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1197

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

Asa

Asa may refer to: People and fictional characters Asa (name), a given name, including a list of people and fictional characters so named Asa people, an ethnic group based in Tanzania Aṣa, Nigerian-French singer, songwriter, and recording artist Bukola Elemide (born 1982) Asa (rapper), Finnish rapper Matti Salo (born 1980) Biblical and mythological figures Asa of Judah, third king of the Kingdom of Judah and the fifth king of the House of David Ása or Æsir, Norse gods Places Asa, Hardoi Uttar Pradesh, India, a village Asu, South Khorasan, Iran, also spelled Asa, a village Asa, Kwara State, Nigeria, a local government area Asa River (Japan), a tributary of the Tama River in Tokyo, Japan Asa (Kazakhstan), a river Asa River (Venezuela) - see List of rivers in Venezuela Other uses Asa (album), the sixth studio album by the German Viking metal band Falkenbach Asa (raga), a peculiar musical raga in Gurmat Sangeet tradition ASA carriage control characters, simple printing command characters used to control the movement of paper through line printers Asa language, spoken by the Asa people of Tanzania Asa Station, a railway station in San'yō-Onoda, Yamaguchi, Japan Asa (railway station), Jambyl Region, Kazakhstan Naboot, also called asa, a quarterstaff constructed of palm wood or rattan Asha, romanized as aṣ̌a, a Zoroastrian concept See also ASA (disambiguation) Åsa (disambiguation) Aasa (disambiguation) Asia (disambiguation) Aza (disambiguation)

1198

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

Acoustics

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

1200

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

Atomic physics

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

1201

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

American Sign Language

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

1202

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

Applet

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

1203

https://en.wikipedia.org/wiki/Alternate%20history

Alternate history

Alternate history (also alternative history, allohistory, althist, AH) is a genre of speculative fiction of stories in which one or more historical events occur and are resolved differently than in real life. As conjecture based upon historical fact, alternate history stories propose What if? scenarios about crucial events in human history, and present outcomes very different from the historical record. Alternate history also is a subgenre of literary fiction, science fiction, and historical fiction; as literature, alternate history uses the tropes of the genre to answer the What if? speculations of the story. Since the 1950s, as a subgenre of science fiction, alternative history stories feature the tropes of time travel between histories, the psychic awareness of the existence of an alternative universe, by the inhabitants of a given universe; and time travel that divides history into various timestreams. In the Spanish, French, German, and Portuguese, Italian, Catalan, and Galician languages, the terms , , and identify the alternate history genre, from which derives the English term uchronia, composed of the Greek prefix ("not", "not any", and "no") and the Greek word () "time", to describe a story that occurs "[in] no time"; analogous to a story that occurs in utopia, "[in] no place". The term uchronia also is the name of the list of alternate-history books, Uchronia: The Alternate History List. Definition Often described as a subgenre of science fiction, Alternative History is a genre of fiction wherein the author speculates upon how the course of history might have been altered if a particular historical event had an outcome different from the real life outcome. An alternate history requires three conditions: (i) A point of divergence from the historical record, before the time in which the author is writing; (ii) A change that would alter known history; and (iii) An examination of the ramifications of that alteration to history. Occasionally, some types of genre fiction are misidentified as alternative history, specifically science fiction stories set in a time that was the future for the writer, but now is the past for the reader, such as the novels 2001: A Space Odyssey (1968), by Arthur C. Clarke and Nineteen Eighty-Four (1949), by George Orwell, because the authors did not alter the history of the past when they wrote the stories. Some alternative history stories feature the tropes of time travel between histories, and the psychic awareness of the existence of an alternative universe, by the inhabitants of a given universe; and time travel that divides history into various timestreams. Similar to the genre of Alternative History, there is also the genre of the Secret History of an event, which can be either fictional or non-fictional, documents events that might have occurred in history, but which had no effect upon the recorded historical outcome. Alternative history also is thematically related to, but distinct from, Counterfactual History, which is a form of historiography that attempts to answer the What if? speculations that arise from counterfactual conditions in order to understand what did happen. As a method of historical research, counterfactual history explores historical events with an extrapolated timeline in which key historical events either did not occur or had an outcome different from the historical record. History of literature Antiquity and medieval The earliest example of alternate (or counterfactual) history is found in Livy's Ab Urbe Condita Libri (book IX, sections 17–19). Livy contemplated an alternative 4th century BC in which Alexander the Great had survived to attack Europe as he had planned; asking, "What would have been the results for Rome if she had been engaged in a war with Alexander?" Livy concluded that the Romans would likely have defeated Alexander. An even earlier possibility is Herodotus's Histories, which contains speculative material. Another example of counterfactual history was posited by cardinal and Doctor of the Church Peter Damian in the 11th century. In his famous work De Divina Omnipotentia, a long letter in which he discusses God's omnipotence, he treats questions related to the limits of divine power, including the question of whether God can change the past, for example, bringing about that Rome was never founded:I see I must respond finally to what many people, on the basis of your holiness’s [own] judgment, raise as an objection on the topic of this dispute. For they say: If, as you assert, God is omnipotent in all things, can he manage this, that things that have been made were not made? He can certainly destroy all things that have been made, so that they do not exist now. But it cannot be seen how he can bring it about that things that have been made were not made. To be sure, it can come about that from now on and hereafter Rome does not exist; for it can be destroyed. But no opinion can grasp how it can come about that it was not founded long ago...One early work of fiction detailing an alternate history is Joanot Martorell's 1490 epic romance Tirant lo Blanch, which was written when the loss of Constantinople to the Turks was still a recent and traumatic memory for Christian Europe. It tells the story of the knight Tirant the White from Brittany who travels to the embattled remnants of the Byzantine Empire. He becomes a Megaduke and commander of its armies and manages to fight off the invading Ottoman armies of . He saves the city from Islamic conquest, and even chases the Turks deeper into lands they had previously conquered. 19th century One of the earliest works of alternate history published in large quantities for the reception of a large audience may be Louis Geoffroy's Histoire de la Monarchie universelle : Napoléon et la conquête du monde (1812–1832) (History of the Universal Monarchy: Napoleon and the Conquest of the World) (1836), which imagines Napoleon's First French Empire emerging victorious in the French invasion of Russia in 1812 and in an invasion of England in 1814, later unifying the world under Bonaparte's rule. In the English language, the first known complete alternate history is Nathaniel Hawthorne's short story "P.'s Correspondence", published in 1845. It recounts the tale of a man who is considered "a madman" due to his perceptions of a different 1845, a reality in which long-dead famous people, such as the poets Robert Burns, Lord Byron, Percy Bysshe Shelley and John Keats, the actor Edmund Kean, the British politician George Canning, and Napoleon Bonaparte, are still alive. The first novel-length alternate history in English would seem to be Castello Holford's Aristopia (1895). While not as nationalistic as Louis Geoffroy's Napoléon et la conquête du monde, 1812–1823, Aristopia is another attempt to portray a Utopian society. In Aristopia, the earliest settlers in Virginia discover a reef made of solid gold and are able to build a Utopian society in North America. Early 20th century and the era of the pulps In 1905, H. G. Wells published A Modern Utopia. As explicitly noted in the book itself, Wells's main aim in writing it was to set out his social and political ideas, the plot serving mainly as a vehicle to expound them. This book introduced the idea of a person being transported from a point in our familiar world to the precise geographical equivalent point in an alternate world in which history had gone differently. The protagonists undergo various adventures in the alternate world, and then are finally transported back to our world, again to the precise geographical equivalent point. Since then, that has become a staple of the alternate history genre. A number of alternate history stories and novels appeared in the late 19th and early 20th centuries (see, for example, Joseph Edgar Chamberlin's The Ifs of History [1907] and Charles Petrie's If: A Jacobite Fantasy [1926]). In 1931, British historian Sir John Squire collected a series of essays from some of the leading historians of the period for his anthology If It Had Happened Otherwise. In that work, scholars from major universities, as well as important non-academic authors, turned their attention to such questions as "If the Moors in Spain Had Won" and "If Louis XVI Had Had an Atom of Firmness". The essays range from serious scholarly efforts to Hendrik Willem van Loon's fanciful and satiric portrayal of an independent 20th-century New Amsterdam, a Dutch city-state on the island of Manhattan. Among the authors included were Hilaire Belloc, André Maurois, and Winston Churchill. One of the entries in Squire's volume was Churchill's "If Lee Had Not Won the Battle of Gettysburg", written from the viewpoint of a historian in a world in which the Confederacy had won the American Civil War. The entry considers what would have happened if the North had been victorious (in other words, a character from an alternate world imagines a world more like the real one we live in, although it is not identical in every detail). Speculative work that narrates from the point of view of an alternate history is variously known as "recursive alternate history", a "double-blind what-if", or an "alternate-alternate history". Churchill's essay was one of the influences behind Ward Moore's alternate history novel Bring the Jubilee in which General Robert E. Lee won the Battle of Gettysburg and paved the way for the eventual victory of the Confederacy in the American Civil War (named the "War of Southron Independence" in this timeline). The protagonist, the autodidact Hodgins Backmaker, travels back to the aforementioned battle and inadvertently changes history, which results in the emergence of our own timeline and the consequent victory of the Union instead. The American humorist author James Thurber parodied alternate history stories about the American Civil War in his 1930 story "If Grant Had Been Drinking at Appomattox", which he accompanied with this very brief introduction: "Scribner's magazine is publishing a series of three articles: 'If Booth Had Missed Lincoln', 'If Lee Had Won the Battle of Gettysburg', and 'If Napoleon Had Escaped to America'. This is the fourth". Another example of alternate history from this period (and arguably the first that explicitly posited cross-time travel from one universe to another as anything more than a visionary experience) is H.G. Wells' Men Like Gods (1923) in which the London-based journalist Mr. Barnstable, along with two cars and their passengers, is mysteriously teleported into "another world", which the "Earthlings" call Utopia. Being far more advanced than Earth, Utopia is some 3000 years ahead of humanity in its development. Wells describes a multiverse of alternative worlds, complete with the paratime travel machines that would later become popular with American pulp writers. However, since his hero experiences only a single alternate world, the story is not very different from conventional alternate history. In the 1930s, alternate history moved into a new arena. The December 1933 issue of Astounding published Nat Schachner's "Ancestral Voices", which was quickly followed by Murray Leinster's "Sidewise in Time". While earlier alternate histories examined reasonably-straightforward divergences, Leinster attempted something completely different. In his "World gone mad", pieces of Earth traded places with their analogs from different timelines. The story follows Professor Minott and his students from a fictitious Robinson College as they wander through analogues of worlds that followed a different history. A somewhat similar approach was taken by Robert A. Heinlein in his 1941 novelette Elsewhen in which a professor trains his mind to move his body across timelines. He then hypnotizes his students so that they can explore more of them. Eventually, each settles into the reality that is most suitable for him or her. Some of the worlds they visit are mundane, some are very odd, and others follow science fiction or fantasy conventions. World War II produced alternate history for propaganda: both British and American authors wrote works depicting Nazi invasions of their respective countries as cautionary tales. Time travel to create historical divergences The period around World War II also saw the publication of the time travel novel Lest Darkness Fall by L. Sprague de Camp in which an American academic travels to Italy at the time of the Byzantine invasion of the Ostrogoths. De Camp's time traveler, Martin Padway, is depicted as making permanent historical changes and implicitly forming a new time branch, thereby making the work an alternate history. In William Tenn's short story Brooklyn Project (1948), a tyrannical US Government brushes aside the warnings of scientists about the dangers of time travel and goes on with a planned experiment - with the result that minor changes to the prehistoric past cause Humanity to never have existed, its place taken by tentacled underwater intelligent creatures - who also have a tyrannical government which also insists on experimenting with time-travel. Time travel as the cause of a point of divergence (POD), which can denote either the bifurcation of a historical timeline or a simple replacement of the future that existed before the time-travelling event, has continued to be a popular theme. In Ward Moore's Bring the Jubilee, the protagonist lives in an alternate history in which the Confederacy has won the American Civil War. He travels backward through time and brings about a Union victory at the Battle of Gettysburg. When a story's assumptions about the nature of time travel lead to the complete replacement of the visited time's future, rather than just the creation of an additional time line, the device of a "time patrol" is often used where guardians move through time to preserve the "correct" history. A more recent example is Making History by Stephen Fry in which a time machine is used to alter history so that Adolf Hitler was never born. That ironically results in a more competent leader of Nazi Germany and results in the country's ascendancy and longevity in the altered timeline. Cross-time stories H.G. Wells' "cross-time" or "many universes" variant (see above) was fully developed by Murray Leinster in his 1934 short story "Sidewise in Time", in which sections of the Earth's surface begin changing places with their counterparts in alternate timelines. Fredric Brown employed this subgenre to satirize the science fiction pulps and their adolescent readers—and fears of foreign invasion—in the classic What Mad Universe (1949). In Clifford D. Simak's Ring Around the Sun (1953), the hero ends up in an alternate earth of thick forests in which humanity never developed but a band of mutants is establishing a colony; the story line appears to frame the author's anxieties regarding McCarthyism and the Cold War. Quantum theory of many worlds While many justifications for alternate histories involve a multiverse, the "many world" theory would naturally involve many worlds, in fact a continually exploding array of universes. In quantum theory, new worlds would proliferate with every quantum event, and even if the writer uses human decisions, every decision that could be made differently would result in a different timeline. A writer's fictional multiverse may, in fact, preclude some decisions as humanly impossible, as when, in Night Watch, Terry Pratchett depicts a character informing Vimes that while anything that can happen, has happened, nevertheless there is no history whatsoever in which Vimes has ever murdered his wife. When the writer explicitly maintains that all possible decisions are made in all possible ways, one possible conclusion is that the characters were neither brave, nor clever, nor skilled, but simply lucky enough to happen on the universe in which they did not choose the cowardly route, take the stupid action, fumble the crucial activity, etc.; few writers focus on this idea, although it has been explored in stories such as Larry Niven's story All the Myriad Ways, where the reality of all possible universes leads to an epidemic of suicide and crime because people conclude their choices have no moral import. In any case, even if it is true that every possible outcome occurs in some world, it can still be argued that traits such as bravery and intelligence might still affect the relative frequency of worlds in which better or worse outcomes occurred (even if the total number of worlds with each type of outcome is infinite, it is still possible to assign a different measure to different infinite sets). The physicist David Deutsch, a strong advocate of the many-worlds interpretation of quantum mechanics, has argued along these lines, saying that "By making good choices, doing the right thing, we thicken the stack of universes in which versions of us live reasonable lives. When you succeed, all the copies of you who made the same decision succeed too. What you do for the better increases the portion of the multiverse where good things happen." This view is perhaps somewhat too abstract to be explored directly in science fiction stories, but a few writers have tried, such as Greg Egan in his short story The Infinite Assassin, where an agent is trying to contain reality-scrambling "whirlpools" that form around users of a certain drug, and the agent is constantly trying to maximize the consistency of behavior among his alternate selves, attempting to compensate for events and thoughts he experiences, he guesses are of low measure relative to those experienced by most of his other selves. Many writers—perhaps the majority—avoid the discussion entirely. In one novel of this type, H. Beam Piper's Lord Kalvan of Otherwhen, a Pennsylvania State Police officer, who knows how to make gunpowder, is transported from our world to an alternate universe where the recipe for gunpowder is a tightly held secret and saves a country that is about to be conquered by its neighbors. The paratime patrol members are warned against going into the timelines immediately surrounding it, where the country will be overrun, but the book never depicts the slaughter of the innocent thus entailed, remaining solely in the timeline where the country is saved. The cross-time theme was further developed in the 1960s by Keith Laumer in the first three volumes of his Imperium sequence, which would be completed in Zone Yellow (1990). Piper's politically more sophisticated variant was adopted and adapted by Michael Kurland and Jack Chalker in the 1980s; Chalker's G.O.D. Inc trilogy (1987–89), featuring paratime detectives Sam and Brandy Horowitz, marks the first attempt at merging the paratime thriller with the police procedural. Kurland's Perchance (1988), the first volume of the never-completed "Chronicles of Elsewhen", presents a multiverse of secretive cross-time societies that utilize a variety of means for cross-time travel, ranging from high-tech capsules to mutant powers. Harry Turtledove has launched the Crosstime Traffic series for teenagers featuring a variant of H. Beam Piper's paratime trading empire. Rival paratime worlds The concept of a cross-time version of a world war, involving rival paratime empires, was developed in Fritz Leiber's Change War series, starting with the Hugo Award winning The Big Time (1958); followed by Richard C. Meredith's Timeliner trilogy in the 1970s, Michael McCollum's A Greater Infinity (1982) and John Barnes' Timeline Wars trilogy in the 1990s. Such "paratime" stories may include speculation that the laws of nature can vary from one universe to the next, providing a science fictional explanation—or veneer—for what is normally fantasy. Aaron Allston's Doc Sidhe and Sidhe Devil take place between our world, the "grim world" and an alternate "fair world" where the Sidhe retreated to. Although technology is clearly present in both worlds, and the "fair world" parallels our history, about fifty years out of step, there is functional magic in the fair world. Even with such explanation, the more explicitly the alternate world resembles a normal fantasy world, the more likely the story is to be labelled fantasy, as in Poul Anderson's "House Rule" and "Loser's Night". In both science fiction and fantasy, whether a given parallel universe is an alternate history may not be clear. The writer might allude to a POD only to explain the existence and make no use of the concept, or may present the universe without explanation of its existence. Major writers explore alternate histories Isaac Asimov's short story "What If—" (1952) is about a couple who can explore alternate realities by means of a television-like device. This idea can also be found in Asimov's novel The End of Eternity (1955), in which the "Eternals" can change the realities of the world, without people being aware of it. Poul Anderson's Time Patrol stories feature conflicts between forces intent on changing history and the Patrol who work to preserve it. One story, Delenda Est, describes a world in which Carthage triumphed over the Roman Republic. The Big Time, by Fritz Leiber, describes a Change War ranging across all of history. Keith Laumer's Worlds of the Imperium is one of the earliest alternate history novels; it was published by Fantastic Stories of the Imagination in 1961, in magazine form, and reprinted by Ace Books in 1962 as one half of an Ace Double. Besides our world, Laumer describes a world ruled by an Imperial aristocracy formed by the merger of European empires, in which the American Revolution never happened, and a third world in post-war chaos ruled by the protagonist's doppelganger. Philip K. Dick's novel, The Man in the High Castle (1962), is an alternate history in which Nazi Germany and Imperial Japan won World War II. This book contains an example of "alternate-alternate" history, in that one of its characters authored a book depicting a reality in which the Allies won the war, itself divergent from real-world history in several aspects. The several characters live within a divided United States, in which the Empire of Japan takes the Pacific states, governing them as a puppet, Nazi Germany takes the East Coast of the United States and parts of the Midwest, with the remnants of the old United States' government as the Neutral Zone, a buffer state between the two superpowers. The book has inspired an Amazon series of the same name. Vladimir Nabokov's novel, Ada or Ardor: A Family Chronicle (1969), is a story of incest that takes place within an alternate North America settled in part by Czarist Russia and that borrows from Dick's idea of "alternate-alternate" history (the world of Nabokov's hero is wracked by rumors of a "counter-earth" that apparently is ours). Some critics believe that the references to a counter-earth suggest that the world portrayed in Ada is a delusion in the mind of the hero (another favorite theme of Dick's novels). Strikingly, the characters in Ada seem to acknowledge their own world as the copy or negative version, calling it "Anti-Terra", while its mythical twin is the real "Terra". Like history, science has followed a divergent path on Anti-Terra: it boasts all the same technology as our world, but all based on water instead of electricity; e.g., when a character in Ada makes a long-distance call, all the toilets in the house flush at once to provide hydraulic power. Guido Morselli described the defeat of Italy (and subsequently France) in World War I in his novel, Past Conditional (1975; ), wherein the static Alpine front line which divided Italy from Austria during that war collapses when the Germans and the Austrians forsake trench warfare and adopt blitzkrieg twenty years in advance. Kingsley Amis set his novel, The Alteration (1976), in the 20th century, but major events in the Reformation did not take place, and Protestantism is limited to the breakaway Republic of New England. Martin Luther was reconciled to the Roman Catholic Church and later became Pope Germanian I. In Nick Hancock and Chris England's 1997 book What Didn't Happen Next: An Alternative History of Football it is suggested that, had Gordon Banks been fit to play in the 1970 FIFA World Cup quarter-final, there would have been no Thatcherism and the post-war consensus would have continued indefinitely. Kim Stanley Robinson's novel, The Years of Rice and Salt (2002), starts at the point of divergence with Timur turning his army away from Europe, and the Black Death has killed 99% of Europe's population, instead of only a third. Robinson explores world history from that point in AD 1405 (807 AH) to about AD 2045 (1467 AH). Rather than following the great man theory of history, focusing on leaders, wars, and major events, Robinson writes more about social history, similar to the Annales School of history theory and Marxist historiography, focusing on the lives of ordinary people living in their time and place. Philip Roth's novel, The Plot Against America (2004), looks at an America where Franklin D. Roosevelt is defeated in 1940 in his bid for a third term as President of the United States, and Charles Lindbergh is elected, leading to a US that features increasing fascism and anti-Semitism. Michael Chabon, occasionally an author of speculative fiction, contributed to the genre with his novel The Yiddish Policemen's Union (2007), which explores a world in which the State of Israel was destroyed in its infancy and many of the world's Jews instead live in a small strip of Alaska set aside by the US government for Jewish settlement. The story follows a Jewish detective solving a murder case in the Yiddish-speaking semi-autonomous city state of Sitka. Stylistically, Chabon borrows heavily from the noir and detective fiction genres, while exploring social issues related to Jewish history and culture. Apart from the alternate history of the Jews and Israel, Chabon also plays with other common tropes of alternate history fiction; in the book, Germany actually loses the war even harder than they did in reality, getting hit with a nuclear bomb instead of just simply losing a ground war (subverting the common "what if Germany won WWII?" trope). Contemporary alternate history in popular literature The late 1980s and the 1990s saw a boom in popular-fiction versions of alternate history, fueled by the emergence of the prolific alternate history author Harry Turtledove, as well as the development of the steampunk genre and two series of anthologies—the What Might Have Been series edited by Gregory Benford and the Alternate ... series edited by Mike Resnick. This period also saw alternate history works by S. M. Stirling, Kim Stanley Robinson, Harry Harrison, Howard Waldrop, Peter Tieryas, and others. In 1986, a sixteen-part epic comic book series called Captain Confederacy began examining a world where the Confederate States of America won the American Civil War. In the series, the Captain and others heroes are staged government propaganda events featuring the feats of these superheroes. Since the late 1990s, Harry Turtledove has been the most prolific practitioner of alternate history and has been given the title "Master of Alternate History" by some. His books include those of Timeline 191 (a.k.a. Southern Victory, also known as TL-191), in which, while the Confederate States of America won the American Civil War, the Union and Imperial Germany defeat the Entente Powers in the two "Great War"s of the 1910s and 1940s (with a Nazi-esque Confederate government attempting to exterminate its Black population), and the Worldwar series, in which aliens invaded Earth during World War II. Other stories by Turtledove include A Different Flesh, in which America was not colonized from Asia during the last ice age; In the Presence of Mine Enemies, in which the Nazis won World War II; and Ruled Britannia, in which the Spanish Armada succeeded in conquering England in the Elizabethan era, with William Shakespeare being given the task of writing the play that will motivate the Britons to rise up against their Spanish conquerors. He also co-authored a book with actor Richard Dreyfuss, The Two Georges, in which the United Kingdom retained the American colonies, with George Washington and King George III making peace. He did a two-volume series in which the Japanese not only bombed Pearl Harbor but also invaded and occupied the Hawaiian Islands. Perhaps the most incessantly explored theme in popular alternate history focuses on worlds in which the Nazis won World War Two. In some versions, the Nazis and/or Axis Powers conquer the entire world; in others, they conquer most of the world but a "Fortress America" exists under siege; while in others, there is a Nazi/Japanese Cold War comparable to the US/Soviet equivalent in 'our' timeline. Fatherland (1992), by Robert Harris, is set in Europe following the Nazi victory. The novel Dominion by C.J. Sansom (2012) is similar in concept but is set in England, with Churchill the leader of an anti-German Resistance and other historic persons in various fictional roles. In the Mecha Samurai Empire series (2016), Peter Tieryas focuses on the Asian-American side of the alternate history, exploring an America ruled by the Japanese Empire while integrating elements of Asian pop culture like mechas and videogames. Several writers have posited points of departure for such a world but then have injected time splitters from the future or paratime travel, for instance James P. Hogan's The Proteus Operation. Norman Spinrad wrote The Iron Dream in 1972, which is intended to be a science fiction novel written by Adolf Hitler after fleeing from Europe to North America in the 1920s. In Jo Walton's "Small Change" series, the United Kingdom made peace with Hitler before the involvement of the United States in World War II, and slowly collapses due to severe economic depression. Former House Speaker Newt Gingrich and William R. Forstchen have written a novel, 1945, in which the US defeated Japan but not Germany in World War II, resulting in a Cold War with Germany rather than the Soviet Union. Gingrich and Forstchen neglected to write the promised sequel; instead, they wrote a trilogy about the American Civil War, starting with Gettysburg: A Novel of the Civil War, in which the Confederates win a victory at the Battle of Gettysburg - however, after Lincoln responds by bringing Grant and his forces to the eastern theater, the Army of Northern Virginia is soon trapped and destroyed in Maryland, and the war ends within weeks. While World War II has been a common Point of Divergence in alternate history literature, several works have been based on other points of divergence. For example, Martin Cruz Smith, in his first novel, posited an independent American Indian nation following the defeat of Custer in The Indians Won (1970). Beginning with The Probability Broach in 1980, L. Neil Smith wrote several novels that postulated the disintegration of the US Federal Government after Albert Gallatin joins the Whiskey Rebellion in 1794 and eventually leads to the creation of a libertarian utopia. In the 2022 novel Poutine and Gin by Steve Rhinelander, the point of divergence is the Battle of the Plains of Abraham of the French and Indian War. That novel is a mystery set in 1940 of that time line. A recent time traveling splitter variant involves entire communities being shifted elsewhere to become the unwitting creators of new time branches. These communities are transported from the present (or the near-future) to the past or to another time-line via a natural disaster, the action of technologically advanced aliens, or a human experiment gone wrong. S. M. Stirling wrote the Island in the Sea of Time trilogy, in which Nantucket Island and all its modern inhabitants are transported to Bronze Age times to become the world's first superpower. In Eric Flint's 1632 series, a small town in West Virginia is transported to 17th century central Europe and drastically changes the course of the Thirty Years' War, which was then underway. John Birmingham's Axis of Time trilogy deals with the culture shock when a United Nations naval task force from 2021 finds itself back in 1942 helping the Allies against the Empire of Japan and the Germans (and doing almost as much harm as good in spite of its advanced weapons). The series also explores the cultural impacts of people with 2021 ideals interacting with 1940s culture. Similarly, Robert Charles Wilson's Mysterium depicts a failed US government experiment which transports a small American town into an alternative version of the US run by believers in a form of Christianity known as Gnosticism, who are engaged in a bitter war with the "Spanish" in Mexico (the chief scientist at the laboratory where the experiment occurred is described as a Gnostic, and references to Christian Gnosticism appear repeatedly in the book). In Time for Patriots by retired astronomer Thomas Wm. Hamilton (4897 Tomhamilton) a town and military academy on Long Island are transported back to 1770, where they shorten the American Revolution, rewrite the Constitution, prolong Mozart's life, battle Barbary pirates, and have other adventures. Although not dealing in physical time travel, in his alt-history novel Marx Returns, Jason Barker introduces anachronisms into the life and times of Karl Marx, such as when his wife Jenny sings a verse from the Sex Pistols's song "Anarchy in the U.K.", or in the games of chess she plays with the Marxes' housekeeper Helene Demuth, which on one occasion involves a Caro–Kann Defence. In her review of the novel, Nina Power writes of "Jenny’s 'utopian' desire for an end to time", an attitude which, according to Power, is inspired by her husband's co-authored book The German Ideology. However, in keeping with the novel's anachronisms, the latter was not published until 1932. By contrast, the novel's timeline ends in 1871. In the 2022 novel Hydrogen Wars: Atomic Sunrise by R.M. Christianson a small change in post-war Japanese history leads to the election of General Douglas MacArthur as President of the United States. This minor change ultimately leads to all-out atomic war between the major Cold War powers. In fantasy genre Many works of straight fantasy and science fantasy take place in historical settings, though with the addition of, for example, magic or mythological beasts. Some present a secret history in which the modern day world no longer believes that these elements ever existed. Many ambiguous alternate/secret histories are set in Renaissance or pre-Renaissance times, and may explicitly include a "retreat" from the world, which would explain the current absence of such phenomena. Other stories make plan a divergence of some kind. In Poul Anderson's Three Hearts and Three Lions in which the Matter of France is history and the fairy folk are real and powerful. The same author's A Midsummer Tempest, occurs in a world in which the plays of William Shakespeare (called here "the Great Historian"), presented the literal truth in every instance. The novel itself takes place in the era of Oliver Cromwell and Charles I. Here, the English Civil War had a different outcome, and the Industrial Revolution has occurred early. Randall Garrett's "Lord Darcy" series presents a point of divergence: a monk systemizes magic rather than science, so the use of foxglove to treat heart disease is regarded as superstition. Another point of divergence occurs in 1199, when Richard the Lionheart survives the Siege of Chaluz and returns to England and makes the Angevin Empire so strong that it survives into the 20th century. Jonathan Strange & Mr Norrell by Susanna Clarke takes place in an England where a separate Kingdom ruled by the Raven King and founded on magic existed in Northumbria for over 300 years. In Patricia Wrede's Regency fantasies, Great Britain has a Royal Society of Wizards. The Tales of Alvin Maker series by Orson Scott Card (a parallel to the life of Joseph Smith, founder of the Latter Day Saint movement) takes place in an alternate America, beginning in the early 19th century. Prior to that time, a POD occurred: England, under the rule of Oliver Cromwell, had banished "makers", or anyone else demonstrating "knacks" (an ability to perform seemingly supernatural feats) to the North American continent. Thus the early American colonists embraced as perfectly ordinary these gifts, and counted on them as a part of their daily lives. The political division of the continent is considerably altered, with two large English colonies bookending a smaller "American" nation, one aligned with England, and the other governed by exiled Cavaliers. Actual historical figures are seen in a much different light: Ben Franklin is revered as the continent's finest "maker", George Washington was executed after being captured, and "Tom" Jefferson is the first president of "Appalachia", the result of a compromise between the Continentals and the British Crown. On the other hand, when the "Old Ones" (fairies) still manifest themselves in England in Keith Roberts's Pavane, which takes place in a technologically backward world after a Spanish assassination of Elizabeth I allowed the Spanish Armada to conquer England, the possibility that the fairies were real but retreated from modern advances makes the POD possible: the fairies really were present all along, in a secret history. Again, in the English Renaissance fantasy Armor of Light by Melissa Scott and Lisa A. Barnett, the magic used in the book, by Dr. John Dee and others, actually was practiced in the Renaissance; positing a secret history of effective magic makes this an alternate history with a point of departure. Sir Philip Sidney survives the Battle of Zutphen in 1586, and shortly thereafter saving the life of Christopher Marlowe. When the magical version of our world's history is set in contemporary times, the distinction becomes clear between alternate history on the one hand and contemporary fantasy, using in effect a form of secret history (as when Josepha Sherman's Son of Darkness has an elf living in New York City, in disguise) on the other. In works such as Robert A. Heinlein's Magic, Incorporated where a construction company can use magic to rig up stands at a sporting event and Poul Anderson's Operation Chaos and its sequel Operation Luna, where djinns are serious weapons of war—with atomic bombs—the use of magic throughout the United States and other modern countries makes it clear that this is not secret history—although references in Operation Chaos to degaussing the effects of cold iron make it possible that it is the result of a POD. The sequel clarifies this as the result of a collaboration of Einstein and Planck in 1901, resulting in the theory of "rhea tics". Henry Moseley applies this theory to "degauss the effects of cold iron and release the goetic forces." This results in the suppression of ferromagnetism and the re-emergence of magic and magical creatures. Alternate history shades off into other fantasy subgenres when the use of actual, though altered, history and geography decreases, although a culture may still be clearly the original source; Barry Hughart's Bridge of Birds and its sequels take place in a fantasy world, albeit one clearly based on China, and with allusions to actual Chinese history, such as the Empress Wu. Richard Garfinkle's Celestial Matters incorporates ancient Chinese physics and Greek Aristotelian physics, using them as if factual. Alternate history has long been a staple of Japanese speculative fiction with such authors as Futaro Yamada and Ryō Hanmura writing novels set in recognizable historical settings with added supernatural or science fiction elements. Ryō Hanmura's 1973 Musubi no Yama Hiroku which recreated 400 years of Japan's history from the perspective of a secret magical family with psychic abilities. The novel has since come to be recognized as a masterpiece of Japanese speculative fiction. Twelve years later, author Hiroshi Aramata wrote the groundbreaking Teito Monogatari which reimagined the history of Tokyo across the 20th century in a world heavily influenced by the supernatural. Television In the Community (TV series) episode Remedial Choas Theory, the six members of the study group roles a die to decide who has to go downstairs to accept a pizza delivery for the group, creating 6 different alternative worlds. Characters from the worst universe, "darkest timeline," would later appear in the "prime universe." The Court-Martial of George Armstrong Custer is a 1977 telemovie where George Custer survives the Battle of Little Bighorn and faces a court martial hearing over his incompetence. Doctor Who's main character has visited two alternative worlds in the TV show and several in its spin off media. The 3rd Doctor visits a world with a fascist Great Britian on the brink of destuction, Inferno (Doctor Who) while the 10th Doctor visits a Britian that has a President and blimps are a common form of transportation beset by Cybermen, Doomsday (Doctor Who). The 7th Doctor faces a threat from an alternative world in Battlefield (Doctor Who), where magic is real and the alternative version of The Doctor is hinted to be that reality's Merlin Fallout (upcoming TV series) shows a 1950s retro-future world that suffers a global nuclear war on the Amazon streaming service. Fatherland (1994 film) is a TV movie set in a 1960 alternative world where US President Joseph Kennedy and Adolph Hitler have agreed to meet to discuss an end to their country’s Cold War 15 years after the Axis victory in World War II. However, an American reporter has discovered proof of the long denied Final Solution threatens the meeting The anime Fena: Pirate Princess featured an alternate 18th century. For All Mankind depicts an alternate timeline in which the Soviet crewed lunar program successfully lands on the Moon before the US Apollo program, resulting in a continued and intensified Space Race. In the TV show Fringe (TV series) the father of one of the main characters crosses into another reality to steal that world’s version of his son after his son dies. The second world has a slightly different history, with a few different states in the United States, such as only one Carolina and Upper Michigan as a state. Also, several major DC Comics events are different, such as Superman not Supergirl dying during Crisis on Infinite Earths. The incursion to steal the son has many negative effects on that world, and while they start out as antagonist, the two realities eventually work together to repair the damage. Loki (TV series) on streaming service Disney+ shows an agency which prevents alterations to the time line. Alternative versions of Loki from various realities appear. The TV show The Man in the High Castle is an adaptation of the novel with the same name that ran for four seasons showing a world where the Axis Powers won World War II. Motherland: Fort Salem explores a female-dominated world in which witchcraft is real. Its world diverged from our timeline when the Salem witch trials are resolved by an agreement between witches and ungifted humans. Parallels (film) was a planned TV show whose pilot was later released as a Netflix movie. The plot concerns a building which can shift realities every 36 hours. The Plot Against America (miniseries) is an HBO miniseries where Charles Lindberg wins the 1940 US Presidential election as an anti-war candidate who moves the country toward fascism. The TV show Sliders explores different possible alternate realities by having the protagonist "slide" into different parallel dimensions of the same planet Earth. SS-GB (TV series) shows a world where the Axis Powers quickly win World War II, killing Churchill and installing a puppet government. However, British resistance fights back. Online Fans of alternate history have made use of the internet from a very early point to showcase their own works and provide useful tools for those fans searching for anything alternate history, first in mailing lists and usenet groups, later in web databases and forums. The "Usenet Alternate History List" was first posted on 11 April 1991, to the Usenet newsgroup rec.arts.sf-lovers. In May 1995, the dedicated newsgroup soc.history.what-if was created for showcasing and discussing alternate histories. Its prominence declined with the general migration from unmoderated usenet to moderated web forums, most prominently AlternateHistory.com, the self-described "largest gathering of alternate history fans on the internet" with over 10,000 active members. In addition to these discussion forums, in 1997 Uchronia: The Alternate History List was created as an online repository, now containing over 2,900 alternate history novels, stories, essays, and other printed materials in several different languages. Uchronia was selected as the Sci Fi Channel's "Sci Fi Site of the Week" twice. See also 20th century in science fiction Alien space bats Alternate ending Alternative future American Civil War alternate histories Dieselpunk Dystopian Fictional universe Future history The Garden of Forking Paths Historical revisionism Hypothetical Axis victory in World War II Invasion literature Jonbar hinge List of alternate history fiction Possible worlds Pulp novels Ruritanian romance References Further reading Chapman, Edgar L., and Carl B. Yoke (eds.). Classic and Iconoclastic Alternate History Science Fiction. Mellen, 2003. Collins, William Joseph. Paths Not Taken: The Development, Structure, and Aesthetics of the Alternative History. University of California at Davis 1990. Darius, Julian. "58 Varieties: Watchmen and Revisionism". In Minutes to Midnight: Twelve Essays on Watchmen. Sequart Research & Literacy Organization, 2010. Focuses on Watchmen as alternate history. Cowley, Robert, ed., What If? Military Historians Imagine What Might Have Been. Pan Books, 1999. Gevers, Nicholas. Mirrors of the Past: Versions of History in Science Fiction and Fantasy. University of Cape Town, 1997 Hellekson, Karen. The Alternate History: Refiguring Historical Time. Kent State University Press, 2001 Keen, Antony G. "Alternate Histories of the Roman Empire in Stephen Baxter, Robert Silverberg and Sophia McDougall". Foundation: The International Review of Science Fiction 102, Spring 2008. McKnight, Edgar Vernon, Jr. Alternative History: The Development of a Literary Genre. University of North Carolina at Chapel Hill, 1994. Morgan, Glyn, and C. Palmer-Patel (eds.). Sideways in Time: Critical Essays on Alternate History Fiction. Liverpool University Press, 2019. Nedelkovh, Aleksandar B. British and American Science Fiction Novel 1950–1980 with the Theme of Alternative History (an Axiological Approach). 1994 , 1999 . Rosenfeld, Gavriel David. The World Hitler Never Made: Alternate History and the Memory of Nazism. 2005 Rosenfeld, Gavriel David. "Why Do We Ask 'What If?' Reflections on the Function of Alternate History." History and Theory 41, Theme Issue 41: Unconventional History (December 2002), 90–103. . Schneider-Mayerson, Matthew. "What Almost Was: The Politics of the Contemporary Alternate History Novel". American Studies 30, 3–4 (Summer 2009), 63–83. Singles, Kathleen. Alternate History: Playing with Contingency and Necessity. De Gruyter, 2013. External links Alternate History on TV Tropes Historical novels subgenres

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

Atomic orbital

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

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

Amino acid

Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. Although hundreds of amino acids exist in nature, by far the most important are the alpha-amino acids, which comprise proteins. Only 22 alpha amino acids appear in the genetic code. Amino acids can be classified according to the locations of the core structural functional groups, as alpha- (α-), beta- (β-), gamma- (γ-) or delta- (δ-) amino acids; other categories relate to polarity, ionization, and side chain group type (aliphatic, acyclic, aromatic, containing hydroxyl or sulfur, etc.). In the form of proteins, amino acid residues form the second-largest component (water being the largest) of human muscles and other tissues. Beyond their role as residues in proteins, amino acids participate in a number of processes such as neurotransmitter transport and biosynthesis. It is thought that they played a key role in enabling life on Earth and its emergence. Amino acids are formally named by the IUPAC-IUBMB Joint Commission on Biochemical Nomenclature in terms of the fictitious "neutral" structure shown in the illustration. For example, the systematic name of alanine is 2-aminopropanoic acid, based on the formula . The Commission justified this approach as follows: The systematic names and formulas given refer to hypothetical forms in which amino groups are unprotonated and carboxyl groups are undissociated. This convention is useful to avoid various nomenclatural problems but should not be taken to imply that these structures represent an appreciable fraction of the amino-acid molecules. History The first few amino acids were discovered in the early 1800s. In 1806, French chemists Louis-Nicolas Vauquelin and Pierre Jean Robiquet isolated a compound from asparagus that was subsequently named asparagine, the first amino acid to be discovered. Cystine was discovered in 1810, although its monomer, cysteine, remained undiscovered until 1884. Glycine and leucine were discovered in 1820. The last of the 20 common amino acids to be discovered was threonine in 1935 by William Cumming Rose, who also determined the essential amino acids and established the minimum daily requirements of all amino acids for optimal growth. The unity of the chemical category was recognized by Wurtz in 1865, but he gave no particular name to it. The first use of the term "amino acid" in the English language dates from 1898, while the German term, , was used earlier. Proteins were found to yield amino acids after enzymatic digestion or acid hydrolysis. In 1902, Emil Fischer and Franz Hofmeister independently proposed that proteins are formed from many amino acids, whereby bonds are formed between the amino group of one amino acid with the carboxyl group of another, resulting in a linear structure that Fischer termed "peptide". General structure In the structure shown at the top of the page, R represents a side chain specific to each amino acid. The carbon atom next to the carboxyl group is called the α–carbon. Amino acids containing an amino group bonded directly to the α-carbon are referred to as α-amino acids. These include proline and hydroxyproline, which are secondary amines. In the past they were often called imino acids, a misnomer because they do not contain an imine grouping . Isomerism The common natural forms of amino acids have a zwitterionic structure, with ( in the case of proline) and functional groups attached to the same C atom, and are thus α-amino acids. With the exception of achiral glycine, natural amino acids have the L configuration, and are the only ones found in proteins during translation in the ribosome. The L and D convention for amino acid configuration refers not to the optical activity of the amino acid itself but rather to the optical activity of the isomer of glyceraldehyde from which that amino acid can, in theory, be synthesized (D-glyceraldehyde is dextrorotatory; L-glyceraldehyde is levorotatory). An alternative convention is to use the (S) and (R) designators to specify the absolute configuration. Almost all of the amino acids in proteins are (S) at the α carbon, with cysteine being (R) and glycine non-chiral. Cysteine has its side chain in the same geometric location as the other amino acids, but the R/S terminology is reversed because sulfur has higher atomic number compared to the carboxyl oxygen which gives the side chain a higher priority by the Cahn-Ingold-Prelog sequence rules, whereas the atoms in most other side chains give them lower priority compared to the carboxyl group. Rarely, D-amino acid residues are found in proteins, and are converted from the -amino acid as a post-translational modification. Side chains Amino acids are designated as α- when the amino nitrogen atom is attached to the α-carbon, the carbon atom adjacent to the carboxylate group. There are several ways to classify amino acids; however, they are often grouped by the polarity of their side chains, as depicted in the graphic at the head of this section. Charged side chains Five amino acids posses a charge at neutral pH. Often these side chains appear at the surfaces on proteins to enable their solubility in water, and side chains with opposite charges form important electrostatic contacts called salt bridges that maintain structures within a single protein or between interfacing proteins. Many proteins bind metal into their structures specifically, and these interactions are commonly mediated by charged side chains such as aspartate, glutamate and histidine. The two negatively charged amino acids at neutral pH are aspartate (Asp, D) and glutamate (Glu, E). The anionic carboxylate groups behave as Brønsted bases in most circumstances. Enzymes in very low pH environments, like the aspartic protease pepsin in mammalian stomachs, may have catalytic aspartate or glutamate residues that act as Brønsted acids. There are three amino acids with side chains that are cations at neutral pH: arginine (Arg, R), lysine (Lys, K) and histidine (His, H). Arginine has a charged guanidino group and lysine a charged alkyl amino group, and are fully protonated at pH 7. Histidine's imidazole group has a pKa of 6.0, and is only around 10 % protonated at neutral pH. Because histidine is easily found in its basic and conjugate acid forms it often participates in catalytic proton transfers in enzyme reactions. Polar uncharged side chains The polar, uncharged amino acids serine (Ser, S), threonine (Thr, T), asparagine (Asn, N) and glutamine (Gln, Q) readily form hydrogen bonds with water and other amino acids. They do not ionize in normal conditions, though a prominent exception being the catalytic serine in serine proteases. This is an example of severe perturbation, and is not characteristic of serine residues in general. Threonine has two chiral centers, not only the L (2S) chiral center at the α-carbon shared by all amino acids apart from achiral glycine, but also (3R) at the β-carbon. The full stereochemical specification is (2S,3R)-L-threonine. Hydrophobic side chains Nonpolar amino acid interactions are the primary driving force behind the processes that fold proteins into their functional three dimensional structures. None of these amino acids' side chains ionize easily, and therefore do not have pKas, with the exception of tyrosine (Tyr, Y). The hydroxyl of tyrosine can deprotonate at high pH forming the negatively charged phenolate. Because of this one could place tyrosine into the polar, uncharged amino acid category, but its very low solubility in water matches the characteristics of hydrophobic amino acids well. Special case side chains Several side chains are not described well by the charged, polar and hydrophobic categories. Glycine (Gly, G) could be considered a polar amino acid since its small size means that its solubility is largely determined by the amino and carboxylate groups. However, the lack of any side chain provides glycine with a unique flexibility among amino acids with large ramifications to protein folding. Cysteine (Cys, C) can also form hydrogen bonds readily, which would place it in the polar amino acid category, though it can often be found in protein structures forming covalent bonds with other cysteines called disulphide bonds. These bonds influence the folding and stability of proteins, and are essential in the formation of antibodies. Proline (Pro, P) has an alkyl side chain and could be considered hydrophobic, but because the side chain joins back onto the alpha amino group it becomes particularly inflexible when incorporated into proteins. Similar to glycine this influences protein structure in a way unique among amino acids. Selenocysteine (Sec, U) is a rare amino acid not directly encoded by DNA, but is incorporated into proteins via the ribosome. Selenocysteine has a lower redox potential compared to the similar cysteine, and participates in several unique enzymatic reactions. Pyrrolysine (Pyl, O) is another amino acid not encoded in DNA, but synthesized into protein by ribosomes. It is found in archaeal species where it participates in the catalytic activity of several methyltransferases. β- and γ-amino acids Amino acids with the structure , such as β-alanine, a component of carnosine and a few other peptides, are β-amino acids. Ones with the structure are γ-amino acids, and so on, where X and Y are two substituents (one of which is normally H). Zwitterions In aqueous solution at pH close to neutrality, amino acids exist as zwitterions, i.e. as dipolar ions with both and in charged states, so the overall structure is . At physiological pH the so-called "neutral forms" are not present to any measurable degree. Although the two charges in the zwitterion structure add up to zero it is misleading to call a species with a net charge of zero "uncharged". In strongly acidic conditions (pH below 3), the carboxylate group becomes protonated and the structure becomes an ammonio carboxylic acid, . This is relevant for enzymes like pepsin that are active in acidic environments such as the mammalian stomach and lysosomes, but does not significantly apply to intracellular enzymes. In highly basic conditions (pH greater than 10, not normally seen in physiological conditions), the ammonio group is deprotonated to give . Although various definitions of acids and bases are used in chemistry, the only one that is useful for chemistry in aqueous solution is that of Brønsted: an acid is a species that can donate a proton to another species, and a base is one that can accept a proton. This criterion is used to label the groups in the above illustration. The carboxylate side chains of aspartate and glutamate residues are the principal Brønsted bases in proteins. Likewise, lysine, tyrosine and cysteine will typically act as a Brønsted acid. Histidine under these conditions can act both as a Brønsted acid and a base. Isoelectric point For amino acids with uncharged side-chains the zwitterion predominates at pH values between the two pKa values, but coexists in equilibrium with small amounts of net negative and net positive ions. At the midpoint between the two pKa values, the trace amount of net negative and trace of net positive ions balance, so that average net charge of all forms present is zero. This pH is known as the isoelectric point pI, so pI = (pKa1 + pKa2). For amino acids with charged side chains, the pKa of the side chain is involved. Thus for aspartate or glutamate with negative side chains, the terminal amino group is essentially entirely in the charged form , but this positive charge needs to be balanced by the state with just one C-terminal carboxylate group is negatively charged. This occurs halfway between the two carboxylate pKa values: pI = (pKa1 + pKa(R)), where pKa(R) is the side chain pKa. Similar considerations apply to other amino acids with ionizable side-chains, including not only glutamate (similar to aspartate), but also cysteine, histidine, lysine, tyrosine and arginine with positive side chains Amino acids have zero mobility in electrophoresis at their isoelectric point, although this behaviour is more usually exploited for peptides and proteins than single amino acids. Zwitterions have minimum solubility at their isoelectric point, and some amino acids (in particular, with nonpolar side chains) can be isolated by precipitation from water by adjusting the pH to the required isoelectric point. Physicochemical properties The 20 canonical amino acids can be classified according to their properties. Important factors are charge, hydrophilicity or hydrophobicity, size, and functional groups. These properties influence protein structure and protein–protein interactions. The water-soluble proteins tend to have their hydrophobic residues (Leu, Ile, Val, Phe, and Trp) buried in the middle of the protein, whereas hydrophilic side chains are exposed to the aqueous solvent. (In biochemistry, a residue refers to a specific monomer within the polymeric chain of a polysaccharide, protein or nucleic acid.) The integral membrane proteins tend to have outer rings of exposed hydrophobic amino acids that anchor them in the lipid bilayer. Some peripheral membrane proteins have a patch of hydrophobic amino acids on their surface that sticks to the membrane. In a similar fashion, proteins that have to bind to positively charged molecules have surfaces rich in negatively charged amino acids such as glutamate and aspartate, while proteins binding to negatively charged molecules have surfaces rich in positively charged amino acids like lysine and arginine. For example, lysine and arginine are present in large amounts in the low-complexity regions of nucleic-acid binding proteins. There are various hydrophobicity scales of amino acid residues. Some amino acids have special properties. Cysteine can form covalent disulfide bonds to other cysteine residues. Proline forms a cycle to the polypeptide backbone, and glycine is more flexible than other amino acids. Glycine and proline are strongly present within low complexity regions of both eukaryotic and prokaryotic proteins, whereas the opposite is the case with cysteine, phenylalanine, tryptophan, methionine, valine, leucine, isoleucine, which are highly reactive, or complex, or hydrophobic. Many proteins undergo a range of posttranslational modifications, whereby additional chemical groups are attached to the amino acid residue side chains sometimes producing lipoproteins (that are hydrophobic), or glycoproteins (that are hydrophilic) allowing the protein to attach temporarily to a membrane. For example, a signaling protein can attach and then detach from a cell membrane, because it contains cysteine residues that can have the fatty acid palmitic acid added to them and subsequently removed. Table of standard amino acid abbreviations and properties Although one-letter symbols are included in the table, IUPAC–IUBMB recommend that "Use of the one-letter symbols should be restricted to the comparison of long sequences". Two additional amino acids are in some species coded for by codons that are usually interpreted as stop codons: In addition to the specific amino acid codes, placeholders are used in cases where chemical or crystallographic analysis of a peptide or protein cannot conclusively determine the identity of a residue. They are also used to summarise conserved protein sequence motifs. The use of single letters to indicate sets of similar residues is similar to the use of abbreviation codes for degenerate bases. Unk is sometimes used instead of Xaa, but is less standard. Ter or * (from termination) is used in notation for mutations in proteins when a stop codon occurs. It correspond to no amino acid at all. In addition, many nonstandard amino acids have a specific code. For example, several peptide drugs, such as Bortezomib and MG132, are artificially synthesized and retain their protecting groups, which have specific codes. Bortezomib is Pyz–Phe–boroLeu, and MG132 is Z–Leu–Leu–Leu–al. To aid in the analysis of protein structure, photo-reactive amino acid analogs are available. These include photoleucine (pLeu) and photomethionine (pMet). Occurrence and functions in biochemistry Amino acids which have the amine group attached to the (alpha-) carbon atom next to the carboxyl group have primary importance in living organisms since they participate in protein synthesis. They are known as 2-, alpha-, or α-amino acids (generic formula in most cases, where R is an organic substituent known as a "side chain"); often the term "amino acid" is used to refer specifically to these. They include the 22 proteinogenic ("protein-building") amino acids, which combine into peptide chains ("polypeptides") to form the building blocks of a vast array of proteins. These are all L-stereoisomers ("left-handed" enantiomers), although a few D-amino acids ("right-handed") occur in bacterial envelopes, as a neuromodulator (D-serine), and in some antibiotics. Many proteinogenic and non-proteinogenic amino acids have biological functions. For example, in the human brain, glutamate (standard glutamic acid) and gamma-aminobutyric acid ("GABA", nonstandard gamma-amino acid) are, respectively, the main excitatory and inhibitory neurotransmitters. Hydroxyproline, a major component of the connective tissue collagen, is synthesised from proline. Glycine is a biosynthetic precursor to porphyrins used in red blood cells. Carnitine is used in lipid transport. Nine proteinogenic amino acids are called "essential" for humans because they cannot be produced from other compounds by the human body and so must be taken in as food. Others may be conditionally essential for certain ages or medical conditions. Essential amino acids may also vary from species to species. Because of their biological significance, amino acids are important in nutrition and are commonly used in nutritional supplements, fertilizers, feed, and food technology. Industrial uses include the production of drugs, biodegradable plastics, and chiral catalysts. Proteinogenic amino acids Amino acids are the precursors to proteins. They join by condensation reactions to form short polymer chains called peptides or longer chains called either polypeptides or proteins. These chains are linear and unbranched, with each amino acid residue within the chain attached to two neighboring amino acids. In Nature, the process of making proteins encoded by DNA/RNA genetic material is called translation and involves the step-by-step addition of amino acids to a growing protein chain by a ribozyme that is called a ribosome. The order in which the amino acids are added is read through the genetic code from an mRNA template, which is an RNA copy of one of the organism's genes. Twenty-two amino acids are naturally incorporated into polypeptides and are called proteinogenic or natural amino acids. Of these, 20 are encoded by the universal genetic code. The remaining 2, selenocysteine and pyrrolysine, are incorporated into proteins by unique synthetic mechanisms. Selenocysteine is incorporated when the mRNA being translated includes a SECIS element, which causes the UGA codon to encode selenocysteine instead of a stop codon. Pyrrolysine is used by some methanogenic archaea in enzymes that they use to produce methane. It is coded for with the codon UAG, which is normally a stop codon in other organisms. This UAG codon is followed by a PYLIS downstream sequence. Several independent evolutionary studies have suggested that Gly, Ala, Asp, Val, Ser, Pro, Glu, Leu, Thr may belong to a group of amino acids that constituted the early genetic code, whereas Cys, Met, Tyr, Trp, His, Phe may belong to a group of amino acids that constituted later additions of the genetic code. Standard vs nonstandard amino acids The 20 amino acids that are encoded directly by the codons of the universal genetic code are called standard or canonical amino acids. A modified form of methionine (N-formylmethionine) is often incorporated in place of methionine as the initial amino acid of proteins in bacteria, mitochondria and chloroplasts. Other amino acids are called nonstandard or non-canonical. Most of the nonstandard amino acids are also non-proteinogenic (i.e. they cannot be incorporated into proteins during translation), but two of them are proteinogenic, as they can be incorporated translationally into proteins by exploiting information not encoded in the universal genetic code. The two nonstandard proteinogenic amino acids are selenocysteine (present in many non-eukaryotes as well as most eukaryotes, but not coded directly by DNA) and pyrrolysine (found only in some archaea and at least one bacterium). The incorporation of these nonstandard amino acids is rare. For example, 25 human proteins include selenocysteine in their primary structure, and the structurally characterized enzymes (selenoenzymes) employ selenocysteine as the catalytic moiety in their active sites. Pyrrolysine and selenocysteine are encoded via variant codons. For example, selenocysteine is encoded by stop codon and SECIS element. N-formylmethionine (which is often the initial amino acid of proteins in bacteria, mitochondria, and chloroplasts) is generally considered as a form of methionine rather than as a separate proteinogenic amino acid. Codon–tRNA combinations not found in nature can also be used to "expand" the genetic code and form novel proteins known as alloproteins incorporating non-proteinogenic amino acids. Non-proteinogenic amino acids Aside from the 22 proteinogenic amino acids, many non-proteinogenic amino acids are known. Those either are not found in proteins (for example carnitine, GABA, levothyroxine) or are not produced directly and in isolation by standard cellular machinery (for example, hydroxyproline and selenomethionine). Non-proteinogenic amino acids that are found in proteins are formed by post-translational modification, which is modification after translation during protein synthesis. These modifications are often essential for the function or regulation of a protein. For example, the carboxylation of glutamate allows for better binding of calcium cations, and collagen contains hydroxyproline, generated by hydroxylation of proline. Another example is the formation of hypusine in the translation initiation factor EIF5A, through modification of a lysine residue. Such modifications can also determine the localization of the protein, e.g., the addition of long hydrophobic groups can cause a protein to bind to a phospholipid membrane. Some non-proteinogenic amino acids are not found in proteins. Examples include 2-aminoisobutyric acid and the neurotransmitter gamma-aminobutyric acid. Non-proteinogenic amino acids often occur as intermediates in the metabolic pathways for standard amino acids – for example, ornithine and citrulline occur in the urea cycle, part of amino acid catabolism (see below). A rare exception to the dominance of α-amino acids in biology is the β-amino acid beta alanine (3-aminopropanoic acid), which is used in plants and microorganisms in the synthesis of pantothenic acid (vitamin B5), a component of coenzyme A. In human nutrition When taken up into the human body from the diet, the 20 standard amino acids either are used to synthesize proteins, other biomolecules, or are oxidized to urea and carbon dioxide as a source of energy. The oxidation pathway starts with the removal of the amino group by a transaminase; the amino group is then fed into the urea cycle. The other product of transamidation is a keto acid that enters the citric acid cycle. Glucogenic amino acids can also be converted into glucose, through gluconeogenesis. Of the 20 standard amino acids, nine (His, Ile, Leu, Lys, Met, Phe, Thr, Trp and Val) are called essential amino acids because the human body cannot synthesize them from other compounds at the level needed for normal growth, so they must be obtained from food. In addition, cysteine, tyrosine, and arginine are considered semiessential amino acids, and taurine a semiessential aminosulfonic acid in children. The metabolic pathways that synthesize these monomers are not fully developed. The amounts required also depend on the age and health of the individual, so it is hard to make general statements about the dietary requirement for some amino acids. Dietary exposure to the nonstandard amino acid BMAA has been linked to human neurodegenerative diseases, including ALS. Non-protein functions In humans, non-protein amino acids also have important roles as metabolic intermediates, such as in the biosynthesis of the neurotransmitter gamma-aminobutyric acid (GABA). Many amino acids are used to synthesize other molecules, for example: Tryptophan is a precursor of the neurotransmitter serotonin. Tyrosine (and its precursor phenylalanine) are precursors of the catecholamine neurotransmitters dopamine, epinephrine and norepinephrine and various trace amines. Phenylalanine is a precursor of phenethylamine and tyrosine in humans. In plants, it is a precursor of various phenylpropanoids, which are important in plant metabolism. Glycine is a precursor of porphyrins such as heme. Arginine is a precursor of nitric oxide. Ornithine and S-adenosylmethionine are precursors of polyamines. Aspartate, glycine, and glutamine are precursors of nucleotides. However, not all of the functions of other abundant nonstandard amino acids are known. Some nonstandard amino acids are used as defenses against herbivores in plants. For example, canavanine is an analogue of arginine that is found in many legumes, and in particularly large amounts in Canavalia gladiata (sword bean). This amino acid protects the plants from predators such as insects and can cause illness in people if some types of legumes are eaten without processing. The non-protein amino acid mimosine is found in other species of legume, in particular Leucaena leucocephala. This compound is an analogue of tyrosine and can poison animals that graze on these plants. Uses in industry Fertilizer The chelating ability of amino acids is sometimes used in fertilizers to facilitate the delivery of minerals to plants in order to correct mineral deficiencies, such as iron chlorosis. These fertilizers are also used to prevent deficiencies from occurring and to improve the overall health of the plants. Animal feed Amino acids are sometimes added to animal feed because some of the components of these feeds, such as soybeans, have low levels of some of the essential amino acids, especially of lysine, methionine, threonine, and tryptophan. Likewise amino acids are used to chelate metal cations in order to improve the absorption of minerals from feed supplements. Food The food industry is a major consumer of amino acids, especially glutamic acid, which is used as a flavor enhancer, and aspartame (aspartylphenylalanine 1-methyl ester), which is used as an artificial sweetener. Amino acids are sometimes added to food by manufacturers to alleviate symptoms of mineral deficiencies, such as anemia, by improving mineral absorption and reducing negative side effects from inorganic mineral supplementation. Pharmaceuticals and cosmetics Similarly, some amino acids derivatives are used in pharmaceutical industry. They include 5-HTP (5-hydroxytryptophan) used for experimental treatment of depression, L-DOPA (L-dihydroxyphenylalanine) for Parkinson's treatment, and eflornithine drug that inhibits ornithine decarboxylase and used in the treatment of sleeping sickness. Amino acids are used in the synthesis of some cosmetics. Expanded genetic code Since 2001, 40 non-natural amino acids have been added into protein by creating a unique codon (recoding) and a corresponding transfer-RNA:aminoacyl – tRNA-synthetase pair to encode it with diverse physicochemical and biological properties in order to be used as a tool to exploring protein structure and function or to create novel or enhanced proteins. Nullomers Nullomers are codons that in theory code for an amino acid, however, in nature there is a selective bias against using this codon in favor of another, for example bacteria prefer to use CGA instead of AGA to code for arginine. This creates some sequences that do not appear in the genome. This characteristic can be taken advantage of and used to create new selective cancer-fighting drugs and to prevent cross-contamination of DNA samples from crime-scene investigations. Chemical building blocks Amino acids are important as low-cost feedstocks. These compounds are used in chiral pool synthesis as enantiomerically pure building blocks. Amino acids have been investigated as precursors chiral catalysts, such as for asymmetric hydrogenation reactions, although no commercial applications exist. Biodegradable plastics Amino acids have been considered as components of biodegradable polymers, which have applications as environmentally friendly packaging and in medicine in drug delivery and the construction of prosthetic implants. An interesting example of such materials is polyaspartate, a water-soluble biodegradable polymer that may have applications in disposable diapers and agriculture. Due to its solubility and ability to chelate metal ions, polyaspartate is also being used as a biodegradable antiscaling agent and a corrosion inhibitor. In addition, the aromatic amino acid tyrosine has been considered as a possible replacement for phenols such as bisphenol A in the manufacture of polycarbonates. Synthesis Chemical synthesis The commercial production of amino acids usually relies on mutant bacteria that overproduce individual amino acids using glucose as a carbon source. Some amino acids are produced by enzymatic conversions of synthetic intermediates. 2-Aminothiazoline-4-carboxylic acid is an intermediate in one industrial synthesis of L-cysteine for example. Aspartic acid is produced by the addition of ammonia to fumarate using a lyase. Biosynthesis In plants, nitrogen is first assimilated into organic compounds in the form of glutamate, formed from alpha-ketoglutarate and ammonia in the mitochondrion. For other amino acids, plants use transaminases to move the amino group from glutamate to another alpha-keto acid. For example, aspartate aminotransferase converts glutamate and oxaloacetate to alpha-ketoglutarate and aspartate. Other organisms use transaminases for amino acid synthesis, too. Nonstandard amino acids are usually formed through modifications to standard amino acids. For example, homocysteine is formed through the transsulfuration pathway or by the demethylation of methionine via the intermediate metabolite S-adenosylmethionine, while hydroxyproline is made by a post translational modification of proline. Microorganisms and plants synthesize many uncommon amino acids. For example, some microbes make 2-aminoisobutyric acid and lanthionine, which is a sulfide-bridged derivative of alanine. Both of these amino acids are found in peptidic lantibiotics such as alamethicin. However, in plants, 1-aminocyclopropane-1-carboxylic acid is a small disubstituted cyclic amino acid that is an intermediate in the production of the plant hormone ethylene. Primordial synthesis The formation of amino acids and peptides are assumed to precede and perhaps induce the emergence of life on earth. Amino acids can form from simple precursors under various conditions. Surface-based chemical metabolism of amino acids and very small compounds may have led to the build-up of amino acids, coenzymes and phosphate-based small carbon molecules. Amino acids and similar building blocks could have been elaborated into proto-peptides, with peptides being considered key players in the origin of life. In the famous Urey-Miller experiment, the passage of an electric arc through a mixture of methane, hydrogen, and ammonia produces a large number of amino acids. Since then, scientists have discovered a range of ways and components by which the potentially prebiotic formation and chemical evolution of peptides may have occurred, such as condensing agents, the design of self-replicating peptides and a number of non-enzymatic mechanisms by which amino acids could have emerged and elaborated into peptides. Several hypotheses invoke the Strecker synthesis whereby hydrogen cyanide, simple aldehydes, ammonia, and water produce amino acids. According to a review, amino acids, and even peptides, "turn up fairly regularly in the various experimental broths that have been allowed to be cooked from simple chemicals. This is because nucleotides are far more difficult to synthesize chemically than amino acids." For a chronological order, it suggests that there must have been a 'protein world' or at least a 'polypeptide world', possibly later followed by the 'RNA world' and the 'DNA world'. Codon–amino acids mappings may be the biological information system at the primordial origin of life on Earth. While amino acids and consequently simple peptides must have formed under different experimentally probed geochemical scenarios, the transition from an abiotic world to the first life forms is to a large extent still unresolved. Reactions Amino acids undergo the reactions expected of the constituent functional groups. Peptide bond formation As both the amine and carboxylic acid groups of amino acids can react to form amide bonds, one amino acid molecule can react with another and become joined through an amide linkage. This polymerization of amino acids is what creates proteins. This condensation reaction yields the newly formed peptide bond and a molecule of water. In cells, this reaction does not occur directly; instead, the amino acid is first activated by attachment to a transfer RNA molecule through an ester bond. This aminoacyl-tRNA is produced in an ATP-dependent reaction carried out by an aminoacyl tRNA synthetase. This aminoacyl-tRNA is then a substrate for the ribosome, which catalyzes the attack of the amino group of the elongating protein chain on the ester bond. As a result of this mechanism, all proteins made by ribosomes are synthesized starting at their N-terminus and moving toward their C-terminus. However, not all peptide bonds are formed in this way. In a few cases, peptides are synthesized by specific enzymes. For example, the tripeptide glutathione is an essential part of the defenses of cells against oxidative stress. This peptide is synthesized in two steps from free amino acids. In the first step, gamma-glutamylcysteine synthetase condenses cysteine and glutamate through a peptide bond formed between the side chain carboxyl of the glutamate (the gamma carbon of this side chain) and the amino group of the cysteine. This dipeptide is then condensed with glycine by glutathione synthetase to form glutathione. In chemistry, peptides are synthesized by a variety of reactions. One of the most-used in solid-phase peptide synthesis uses the aromatic oxime derivatives of amino acids as activated units. These are added in sequence onto the growing peptide chain, which is attached to a solid resin support. Libraries of peptides are used in drug discovery through high-throughput screening. The combination of functional groups allow amino acids to be effective polydentate ligands for metal–amino acid chelates. The multiple side chains of amino acids can also undergo chemical reactions. Catabolism Degradation of an amino acid often involves deamination by moving its amino group to alpha-ketoglutarate, forming glutamate. This process involves transaminases, often the same as those used in amination during synthesis. In many vertebrates, the amino group is then removed through the urea cycle and is excreted in the form of urea. However, amino acid degradation can produce uric acid or ammonia instead. For example, serine dehydratase converts serine to pyruvate and ammonia. After removal of one or more amino groups, the remainder of the molecule can sometimes be used to synthesize new amino acids, or it can be used for energy by entering glycolysis or the citric acid cycle, as detailed in image at right. Complexation Amino acids are bidentate ligands, forming transition metal amino acid complexes. Chemical analysis The total nitrogen content of organic matter is mainly formed by the amino groups in proteins. The Total Kjeldahl Nitrogen (TKN) is a measure of nitrogen widely used in the analysis of (waste) water, soil, food, feed and organic matter in general. As the name suggests, the Kjeldahl method is applied. More sensitive methods are available. See also Amino acid dating Beta-peptide Degron Erepsin Homochirality Hyperaminoacidemia Leucines Miller–Urey experiment Nucleic acid sequence RNA codon table Notes References Further reading External links Nitrogen cycle Zwitterions

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

Alan Turing

Alan Mathison Turing (; 23 June 1912 – 7 June 1954) was an English mathematician, computer scientist, logician, cryptanalyst, philosopher, and theoretical biologist. Turing was highly influential in the development of theoretical computer science, providing a formalisation of the concepts of algorithm and computation with the Turing machine, which can be considered a model of a general-purpose computer. He is widely considered to be the father of theoretical computer science and artificial intelligence. Born in Maida Vale, London, Turing was raised in southern England. He graduated at King's College, Cambridge, with a degree in mathematics. Whilst he was a fellow at Cambridge, he published a proof demonstrating that some purely mathematical yes–no questions can never be answered by computation and defined a Turing machine, and went on to prove that the halting problem for Turing machines is undecidable. In 1938, he obtained his PhD from the Department of Mathematics at Princeton University. During the Second World War, Turing worked for the Government Code and Cypher School (GC&CS) at Bletchley Park, Britain's codebreaking centre that produced Ultra intelligence. For a time he led Hut 8, the section that was responsible for German naval cryptanalysis. Here, he devised a number of techniques for speeding the breaking of German ciphers, including improvements to the pre-war Polish bomba method, an electromechanical machine that could find settings for the Enigma machine. Turing played a crucial role in cracking intercepted coded messages that enabled the Allies to defeat the Axis powers in many crucial engagements, including the Battle of the Atlantic. After the war, Turing worked at the National Physical Laboratory, where he designed the Automatic Computing Engine (ACE), one of the first designs for a stored-program computer. In 1948, Turing joined Max Newman's Computing Machine Laboratory, at the Victoria University of Manchester, where he helped develop the Manchester computers and became interested in mathematical biology. He wrote a paper on the chemical basis of morphogenesis and predicted oscillating chemical reactions such as the Belousov–Zhabotinsky reaction, first observed in the 1960s. Despite these accomplishments, Turing was never fully recognised in Britain during his lifetime because much of his work was covered by the Official Secrets Act. Turing was prosecuted in 1952 for homosexual acts. He accepted hormone treatment with DES, a procedure commonly referred to as chemical castration, as an alternative to prison. Turing died on 7 June 1954, 16 days before his 42nd birthday, from cyanide poisoning. An inquest determined his death as a suicide, but it has been noted that the known evidence is also consistent with accidental poisoning. Following a public campaign in 2009, the British prime minister Gordon Brown made an official public apology on behalf of the British government for "the appalling way [Turing] was treated". Queen Elizabeth II granted a posthumous pardon in 2013. The term "Alan Turing law" is now used informally to refer to a 2017 law in the United Kingdom that retroactively pardoned men cautioned or convicted under historical legislation that outlawed homosexual acts. Turing has an extensive legacy with statues of him and many things named after him, including an annual award for computer science innovations. He appears on the current Bank of England £50 note, which was released on 23 June 2021, to coincide with his birthday. A 2019 BBC series, as voted by the audience, named him the greatest person of the 20th century. Early life and education Family Turing was born in Maida Vale, London, while his father, Julius Mathison Turing (1873–1947), was on leave from his position with the Indian Civil Service (ICS) of the British Raj government at Chatrapur, then in the Madras Presidency and presently in Odisha state, in India. Turing's father was the son of a clergyman, the Rev. John Robert Turing, from a Scottish family of merchants that had been based in the Netherlands and included a baronet. Turing's mother, Julius's wife, was Ethel Sara Turing (; 1881–1976), daughter of Edward Waller Stoney, chief engineer of the Madras Railways. The Stoneys were a Protestant Anglo-Irish gentry family from both County Tipperary and County Longford, while Ethel herself had spent much of her childhood in County Clare. Julius and Ethel married on 1 October 1907 at Batholomew's church on Clyde Road, in Dublin. Julius's work with the ICS brought the family to British India, where his grandfather had been a general in the Bengal Army. However, both Julius and Ethel wanted their children to be brought up in Britain, so they moved to Maida Vale, London, where Alan Turing was born on 23 June 1912, as recorded by a blue plaque on the outside of the house of his birth, later the Colonnade Hotel. Turing had an elder brother, John (the father of Sir John Dermot Turing, 12th Baronet of the Turing baronets). Turing's father's civil service commission was still active and during Turing's childhood years, his parents travelled between Hastings in the United Kingdom and India, leaving their two sons to stay with a retired Army couple. At Hastings, Turing stayed at Baston Lodge, Upper Maze Hill, St Leonards-on-Sea, now marked with a blue plaque. The plaque was unveiled on 23 June 2012, the centenary of Turing's birth. Very early in life, Turing showed signs of the genius that he was later to display prominently. His parents purchased a house in Guildford in 1927, and Turing lived there during school holidays. The location is also marked with a blue plaque. School Turing's parents enrolled him at St Michael's, a primary school at 20 Charles Road, St Leonards-on-Sea, from the age of six to nine. The headmistress recognised his talent, noting that she has "...had clever boys and hardworking boys, but Alan is a genius". Between January 1922 and 1926, Turing was educated at Hazelhurst Preparatory School, an independent school in the village of Frant in Sussex (now East Sussex). In 1926, at the age of 13, he went on to Sherborne School, a boarding independent school in the market town of Sherborne in Dorset, where he boarded at Westcott House. The first day of term coincided with the 1926 General Strike, in Britain, but Turing was so determined to attend that he rode his bicycle unaccompanied from Southampton to Sherborne, stopping overnight at an inn. Turing's natural inclination towards mathematics and science did not earn him respect from some of the teachers at Sherborne, whose definition of education placed more emphasis on the classics. His headmaster wrote to his parents: "I hope he will not fall between two stools. If he is to stay at public school, he must aim at becoming educated. If he is to be solely a Scientific Specialist, he is wasting his time at a public school". Despite this, Turing continued to show remarkable ability in the studies he loved, solving advanced problems in 1927 without having studied even elementary calculus. In 1928, aged 16, Turing encountered Albert Einstein's work; not only did he grasp it, but it is possible that he managed to deduce Einstein's questioning of Newton's laws of motion from a text in which this was never made explicit. Christopher Morcom At Sherborne, Turing formed a significant friendship with fellow pupil Christopher Collan Morcom (13 July 1911 – 13 February 1930), who has been described as Turing's "first love". Their relationship provided inspiration in Turing's future endeavours, but it was cut short by Morcom's death, in February 1930, from complications of bovine tuberculosis, contracted after drinking infected cow's milk some years previously. The event caused Turing great sorrow. He coped with his grief by working that much harder on the topics of science and mathematics that he had shared with Morcom. In a letter to Morcom's mother, Frances Isobel Morcom (née Swan), Turing wrote: Turing's relationship with Morcom's mother continued long after Morcom's death, with her sending gifts to Turing, and him sending letters, typically on Morcom's birthday. A day before the third anniversary of Morcom's death (13 February 1933), he wrote to Mrs. Morcom: Some have speculated that Morcom's death was the cause of Turing's atheism and materialism. Apparently, at this point in his life he still believed in such concepts as a spirit, independent of the body and surviving death. In a later letter, also written to Morcom's mother, Turing wrote: University and work on computability After Sherborne, Turing studied as an undergraduate from 1931 to 1934 at King's College, Cambridge, where he was awarded first-class honours in mathematics. In 1935, at the age of 22, he was elected a Fellow of King's College on the strength of a dissertation in which he proved a version of the central limit theorem. Unknown to Turing, this version of the theorem had already been proven, in 1922, by Jarl Waldemar Lindeberg. Despite this, the committee found Turing's methods original and so regarded the work worthy of consideration for the fellowship. Abram Besicovitch's report for the committee went so far as to say that if Turing's work had been published before Lindeberg's, it would have been "an important event in the mathematical literature of that year". In 1936, Turing published his paper "On Computable Numbers, with an Application to the Entscheidungsproblem". It was published in the Proceedings of the London Mathematical Society journal in two parts, the first on 30 November and the second on 23 December. In this paper, Turing reformulated Kurt Gödel's 1931 results on the limits of proof and computation, replacing Gödel's universal arithmetic-based formal language with the formal and simple hypothetical devices that became known as Turing machines. The Entscheidungsproblem (decision problem) was originally posed by German mathematician David Hilbert in 1928. Turing proved that his "universal computing machine" would be capable of performing any conceivable mathematical computation if it were representable as an algorithm. He went on to prove that there was no solution to the decision problem by first showing that the halting problem for Turing machines is undecidable: it is not possible to decide algorithmically whether a Turing machine will ever halt. This paper has been called "easily the most influential math paper in history". Although Turing's proof was published shortly after Alonzo Church's equivalent proof using his lambda calculus, Turing's approach is considerably more accessible and intuitive than Church's. It also included a notion of a 'Universal Machine' (now known as a universal Turing machine), with the idea that such a machine could perform the tasks of any other computation machine (as indeed could Church's lambda calculus). According to the Church–Turing thesis, Turing machines and the lambda calculus are capable of computing anything that is computable. John von Neumann acknowledged that the central concept of the modern computer was due to Turing's paper. To this day, Turing machines are a central object of study in theory of computation. From September 1936 to July 1938, Turing spent most of his time studying under Church at Princeton University, in the second year as a Jane Eliza Procter Visiting Fellow. In addition to his purely mathematical work, he studied cryptology and also built three of four stages of an electro-mechanical binary multiplier. In June 1938, he obtained his PhD from the Department of Mathematics at Princeton; his dissertation, Systems of Logic Based on Ordinals, introduced the concept of ordinal logic and the notion of relative computing, in which Turing machines are augmented with so-called oracles, allowing the study of problems that cannot be solved by Turing machines. John von Neumann wanted to hire him as his postdoctoral assistant, but he went back to the United Kingdom. Career and research When Turing returned to Cambridge, he attended lectures given in 1939 by Ludwig Wittgenstein about the foundations of mathematics. The lectures have been reconstructed verbatim, including interjections from Turing and other students, from students' notes. Turing and Wittgenstein argued and disagreed, with Turing defending formalism and Wittgenstein propounding his view that mathematics does not discover any absolute truths, but rather invents them. Cryptanalysis During the Second World War, Turing was a leading participant in the breaking of German ciphers at Bletchley Park. The historian and wartime codebreaker Asa Briggs has said, "You needed exceptional talent, you needed genius at Bletchley and Turing's was that genius." From September 1938, Turing worked part-time with the Government Code and Cypher School (GC&CS), the British codebreaking organisation. He concentrated on cryptanalysis of the Enigma cipher machine used by Nazi Germany, together with Dilly Knox, a senior GC&CS codebreaker. Soon after the July 1939 meeting near Warsaw at which the Polish Cipher Bureau gave the British and French details of the wiring of Enigma machine's rotors and their method of decrypting Enigma machine's messages, Turing and Knox developed a broader solution. The Polish method relied on an insecure indicator procedure that the Germans were likely to change, which they in fact did in May 1940. Turing's approach was more general, using crib-based decryption for which he produced the functional specification of the bombe (an improvement on the Polish Bomba). On 4 September 1939, the day after the UK declared war on Germany, Turing reported to Bletchley Park, the wartime station of GC&CS. Like all others who came to Bletchley, he was required to sign the Official Secrets Act, in which he agreed not to disclose anything about his work at Bletchley, with severe legal penalties for violating the Act. Specifying the bombe was the first of five major cryptanalytical advances that Turing made during the war. The others were: deducing the indicator procedure used by the German navy; developing a statistical procedure dubbed Banburismus for making much more efficient use of the bombes; developing a procedure dubbed Turingery for working out the cam settings of the wheels of the Lorenz SZ 40/42 (Tunny) cipher machine and, towards the end of the war, the development of a portable secure voice scrambler at Hanslope Park that was codenamed Delilah. By using statistical techniques to optimise the trial of different possibilities in the code breaking process, Turing made an innovative contribution to the subject. He wrote two papers discussing mathematical approaches, titled The Applications of Probability to Cryptography and Paper on Statistics of Repetitions, which were of such value to GC&CS and its successor GCHQ that they were not released to the UK National Archives until April 2012, shortly before the centenary of his birth. A GCHQ mathematician, "who identified himself only as Richard," said at the time that the fact that the contents had been restricted under the Official Secrets Act for some 70 years demonstrated their importance, and their relevance to post-war cryptanalysis: Turing had a reputation for eccentricity at Bletchley Park. He was known to his colleagues as "Prof" and his treatise on Enigma was known as the "Prof's Book". According to historian Ronald Lewin, Jack Good, a cryptanalyst who worked with Turing, said of his colleague: Peter Hilton recounted his experience working with Turing in Hut 8 in his "Reminiscences of Bletchley Park" from A Century of Mathematics in America: Hilton echoed similar thoughts in the Nova PBS documentary Decoding Nazi Secrets. While working at Bletchley, Turing, who was a talented long-distance runner, occasionally ran the to London when he was needed for meetings, and he was capable of world-class marathon standards. Turing tried out for the 1948 British Olympic team, but he was hampered by an injury. His tryout time for the marathon was only 11 minutes slower than British silver medallist Thomas Richards' Olympic race time of 2 hours 35 minutes. He was Walton Athletic Club's best runner, a fact discovered when he passed the group while running alone. When asked why he ran so hard in training he replied: Due to the problems of counterfactual history, it is hard to estimate the precise effect Ultra intelligence had on the war. However, official war historian Harry Hinsley estimated that this work shortened the war in Europe by more than two years and saved over 14 million lives. At the end of the war, a memo was sent to all those who had worked at Bletchley Park, reminding them that the code of silence dictated by the Official Secrets Act did not end with the war but would continue indefinitely. Thus, even though Turing was appointed an Officer of the Order of the British Empire (OBE) in 1946 by King George VI for his wartime services, his work remained secret for many years. Bombe Within weeks of arriving at Bletchley Park, Turing had specified an electromechanical machine called the bombe, which could break Enigma more effectively than the Polish bomba kryptologiczna, from which its name was derived. The bombe, with an enhancement suggested by mathematician Gordon Welchman, became one of the primary tools, and the major automated one, used to attack Enigma-enciphered messages. The bombe searched for possible correct settings used for an Enigma message (i.e., rotor order, rotor settings and plugboard settings) using a suitable crib: a fragment of probable plaintext. For each possible setting of the rotors (which had on the order of 1019 states, or 1022 states for the four-rotor U-boat variant), the bombe performed a chain of logical deductions based on the crib, implemented electromechanically. The bombe detected when a contradiction had occurred and ruled out that setting, moving on to the next. Most of the possible settings would cause contradictions and be discarded, leaving only a few to be investigated in detail. A contradiction would occur when an enciphered letter would be turned back into the same plaintext letter, which was impossible with the Enigma. The first bombe was installed on 18 March 1940. Action This Day By late 1941, Turing and his fellow cryptanalysts Gordon Welchman, Hugh Alexander and Stuart Milner-Barry were frustrated. Building on the work of the Poles, they had set up a good working system for decrypting Enigma signals, but their limited staff and bombes meant they could not translate all the signals. In the summer, they had considerable success, and shipping losses had fallen to under 100,000 tons a month; however, they badly needed more resources to keep abreast of German adjustments. They had tried to get more people and fund more bombes through the proper channels, but had failed. On 28 October they wrote directly to Winston Churchill explaining their difficulties, with Turing as the first named. They emphasised how small their need was compared with the vast expenditure of men and money by the forces and compared with the level of assistance they could offer to the forces. As Andrew Hodges, biographer of Turing, later wrote, "This letter had an electric effect." Churchill wrote a memo to General Ismay, which read: "ACTION THIS DAY. Make sure they have all they want on extreme priority and report to me that this has been done." On 18 November, the chief of the secret service reported that every possible measure was being taken. The cryptographers at Bletchley Park did not know of the Prime Minister's response, but as Milner-Barry recalled, "All that we did notice was that almost from that day the rough ways began miraculously to be made smooth." More than two hundred bombes were in operation by the end of the war. Hut 8 and the naval Enigma Turing decided to tackle the particularly difficult problem of German naval Enigma "because no one else was doing anything about it and I could have it to myself". In December 1939, Turing solved the essential part of the naval indicator system, which was more complex than the indicator systems used by the other services. That same night, he also conceived of the idea of Banburismus, a sequential statistical technique (what Abraham Wald later called sequential analysis) to assist in breaking the naval Enigma, "though I was not sure that it would work in practice, and was not, in fact, sure until some days had actually broken". For this, he invented a measure of weight of evidence that he called the ban. Banburismus could rule out certain sequences of the Enigma rotors, substantially reducing the time needed to test settings on the bombes. Later this sequential process of accumulating sufficient weight of evidence using decibans (one tenth of a ban) was used in Cryptanalysis of the Lorenz cipher. Turing travelled to the United States in November 1942 and worked with US Navy cryptanalysts on the naval Enigma and bombe construction in Washington; he also visited their Computing Machine Laboratory in Dayton, Ohio. Turing's reaction to the American bombe design was far from enthusiastic: During this trip, he also assisted at Bell Labs with the development of secure speech devices. He returned to Bletchley Park in March 1943. During his absence, Hugh Alexander had officially assumed the position of head of Hut 8, although Alexander had been de facto head for some time (Turing having little interest in the day-to-day running of the section). Turing became a general consultant for cryptanalysis at Bletchley Park. Alexander wrote of Turing's contribution: Turingery In July 1942, Turing devised a technique termed Turingery (or jokingly Turingismus) for use against the Lorenz cipher messages produced by the Germans' new Geheimschreiber (secret writer) machine. This was a teleprinter rotor cipher attachment codenamed Tunny at Bletchley Park. Turingery was a method of wheel-breaking, i.e., a procedure for working out the cam settings of Tunny's wheels. He also introduced the Tunny team to Tommy Flowers who, under the guidance of Max Newman, went on to build the Colossus computer, the world's first programmable digital electronic computer, which replaced a simpler prior machine (the Heath Robinson), and whose superior speed allowed the statistical decryption techniques to be applied usefully to the messages. Some have mistakenly said that Turing was a key figure in the design of the Colossus computer. Turingery and the statistical approach of Banburismus undoubtedly fed into the thinking about cryptanalysis of the Lorenz cipher, but he was not directly involved in the Colossus development. Delilah Following his work at Bell Labs in the US, Turing pursued the idea of electronic enciphering of speech in the telephone system. In the latter part of the war, he moved to work for the Secret Service's Radio Security Service (later HMGCC) at Hanslope Park. At the park, he further developed his knowledge of electronics with the assistance of engineer Donald Bayley. Together they undertook the design and construction of a portable secure voice communications machine codenamed Delilah. The machine was intended for different applications, but it lacked the capability for use with long-distance radio transmissions. In any case, Delilah was completed too late to be used during the war. Though the system worked fully, with Turing demonstrating it to officials by encrypting and decrypting a recording of a Winston Churchill speech, Delilah was not adopted for use. Turing also consulted with Bell Labs on the development of SIGSALY, a secure voice system that was used in the later years of the war. Early computers and the Turing test Between 1945 and 1947, Turing lived in Hampton, London, while he worked on the design of the ACE (Automatic Computing Engine) at the National Physical Laboratory (NPL). He presented a paper on 19 February 1946, which was the first detailed design of a stored-program computer. Von Neumann's incomplete First Draft of a Report on the EDVAC had predated Turing's paper, but it was much less detailed and, according to John R. Womersley, Superintendent of the NPL Mathematics Division, it "contains a number of ideas which are Dr. Turing's own". Although ACE was a feasible design, the effect of the Official Secrets Act surrounding the wartime work at Bletchley Park made it impossible for Turing to explain the basis of his analysis of how a computer installation involving human operators would work. This led to delays in starting the project and he became disillusioned. In late 1947 he returned to Cambridge for a sabbatical year during which he produced a seminal work on Intelligent Machinery that was not published in his lifetime. While he was at Cambridge, the Pilot ACE was being built in his absence. It executed its first program on 10 May 1950, and a number of later computers around the world owe much to it, including the English Electric DEUCE and the American Bendix G-15. The full version of Turing's ACE was not built until after his death. According to the memoirs of the German computer pioneer Heinz Billing from the Max Planck Institute for Physics, published by Genscher, Düsseldorf, there was a meeting between Turing and Konrad Zuse. It took place in Göttingen in 1947. The interrogation had the form of a colloquium. Participants were Womersley, Turing, Porter from England and a few German researchers like Zuse, Walther, and Billing (for more details see Herbert Bruderer, Konrad Zuse und die Schweiz). In 1948, Turing was appointed reader in the Mathematics Department at the Victoria University of Manchester. A year later, he became deputy director of the Computing Machine Laboratory, where he worked on software for one of the earliest stored-program computers—the Manchester Mark 1. Turing wrote the first version of the Programmer's Manual for this machine, and was recruited by Ferranti as a consultant in the development of their commercialised machine, the Ferranti Mark 1. He continued to be paid consultancy fees by Ferranti until his death. During this time, he continued to do more abstract work in mathematics, and in "Computing Machinery and Intelligence" (Mind, October 1950), Turing addressed the problem of artificial intelligence, and proposed an experiment that became known as the Turing test, an attempt to define a standard for a machine to be called "intelligent". The idea was that a computer could be said to "think" if a human interrogator could not tell it apart, through conversation, from a human being. In the paper, Turing suggested that rather than building a program to simulate the adult mind, it would be better to produce a simpler one to simulate a child's mind and then to subject it to a course of education. A reversed form of the Turing test is widely used on the Internet; the CAPTCHA test is intended to determine whether the user is a human or a computer. In 1948, Turing, working with his former undergraduate colleague, D.G. Champernowne, began writing a chess program for a computer that did not yet exist. By 1950, the program was completed and dubbed the Turochamp. In 1952, he tried to implement it on a Ferranti Mark 1, but lacking enough power, the computer was unable to execute the program. Instead, Turing "ran" the program by flipping through the pages of the algorithm and carrying out its instructions on a chessboard, taking about half an hour per move. The game was recorded. According to Garry Kasparov, Turing's program "played a recognizable game of chess". The program lost to Turing's colleague Alick Glennie, although it is said that it won a game against Champernowne's wife, Isabel. His Turing test was a significant, characteristically provocative, and lasting contribution to the debate regarding artificial intelligence, which continues after more than half a century. Pattern formation and mathematical biology When Turing was 39 years old in 1951, he turned to mathematical biology, finally publishing his masterpiece "The Chemical Basis of Morphogenesis" in January 1952. He was interested in morphogenesis, the development of patterns and shapes in biological organisms. He suggested that a system of chemicals reacting with each other and diffusing across space, termed a reaction–diffusion system, could account for "the main phenomena of morphogenesis". He used systems of partial differential equations to model catalytic chemical reactions. For example, if a catalyst A is required for a certain chemical reaction to take place, and if the reaction produced more of the catalyst A, then we say that the reaction is autocatalytic, and there is positive feedback that can be modelled by nonlinear differential equations. Turing discovered that patterns could be created if the chemical reaction not only produced catalyst A, but also produced an inhibitor B that slowed down the production of A. If A and B then diffused through the container at different rates, then you could have some regions where A dominated and some where B did. To calculate the extent of this, Turing would have needed a powerful computer, but these were not so freely available in 1951, so he had to use linear approximations to solve the equations by hand. These calculations gave the right qualitative results, and produced, for example, a uniform mixture that oddly enough had regularly spaced fixed red spots. The Russian biochemist Boris Belousov had performed experiments with similar results, but could not get his papers published because of the contemporary prejudice that any such thing violated the second law of thermodynamics. Belousov was not aware of Turing's paper in the Philosophical Transactions of the Royal Society. Although published before the structure and role of DNA was understood, Turing's work on morphogenesis remains relevant today and is considered a seminal piece of work in mathematical biology. One of the early applications of Turing's paper was the work by James Murray explaining spots and stripes on the fur of cats, large and small. Further research in the area suggests that Turing's work can partially explain the growth of "feathers, hair follicles, the branching pattern of lungs, and even the left-right asymmetry that puts the heart on the left side of the chest". In 2012, Sheth, et al. found that in mice, removal of Hox genes causes an increase in the number of digits without an increase in the overall size of the limb, suggesting that Hox genes control digit formation by tuning the wavelength of a Turing-type mechanism. Later papers were not available until Collected Works of A. M. Turing was published in 1992. Personal life Engagement In 1941, Turing proposed marriage to Hut 8 colleague Joan Clarke, a fellow mathematician and cryptanalyst, but their engagement was short-lived. After admitting his homosexuality to his fiancée, who was reportedly "unfazed" by the revelation, Turing decided that he could not go through with the marriage. Homosexuality and indecency conviction In January 1952, Turing was 39 when he started a relationship with Arnold Murray, a 19-year-old unemployed man. Just before Christmas, Turing was walking along Manchester's Oxford Road when he met Murray just outside the Regal Cinema and invited him to lunch. On 23 January, Turing's house was burgled. Murray told Turing that he and the burglar were acquainted, and Turing reported the crime to the police. During the investigation, he acknowledged a sexual relationship with Murray. Homosexual acts were criminal offences in the United Kingdom at that time, and both men were charged with "gross indecency" under Section 11 of the Criminal Law Amendment Act 1885. Initial committal proceedings for the trial were held on 27 February during which Turing's solicitor "reserved his defence", i.e., did not argue or provide evidence against the allegations. Turing was later convinced by the advice of his brother and his own solicitor, and he entered a plea of guilty. The case, Regina v. Turing and Murray, was brought to trial on 31 March 1952. Turing was convicted and given a choice between imprisonment and probation. His probation would be conditional on his agreement to undergo hormonal physical changes designed to reduce libido, known as "chemical castration". He accepted the option of injections of what was then called stilboestrol (now known as diethylstilbestrol or DES), a synthetic oestrogen; this feminization of his body was continued for the course of one year. The treatment rendered Turing impotent and caused breast tissue to form, fulfilling in the literal sense Turing's prediction that "no doubt I shall emerge from it all a different man, but quite who I've not found out". Murray was given a conditional discharge. Turing's conviction led to the removal of his security clearance and barred him from continuing with his cryptographic consultancy for the Government Communications Headquarters (GCHQ), the British signals intelligence agency that had evolved from GC&CS in 1946, though he kept his academic job. He was denied entry into the United States after his conviction in 1952, but was free to visit other European countries. Treasure In the 1940s, Turing became worried about losing his savings in the event of a German invasion. In order to protect it, he bought two silver bars weighing and worth £250 (in 2022, £8,000 adjusted for inflation, £48,000 at spot price) and buried them in a wood near Bletchley Park. Upon returning to dig them up, Turing found that he was unable to break his own code describing where exactly he had hidden them. This, along with the fact that the area had been renovated, meant that he never regained the silver. Death On 8 June 1954, at his house at 43 Adlington Road, Wilmslow, Turing's housekeeper found him dead. He had died the previous day at the age of 41. Cyanide poisoning was established as the cause of death. When his body was discovered, an apple lay half-eaten beside his bed, and although the apple was not tested for cyanide, it was speculated that this was the means by which Turing had consumed a fatal dose. An inquest determined that he had committed suicide. Andrew Hodges and another biographer, David Leavitt, have both speculated that Turing was re-enacting a scene from the Walt Disney film Snow White and the Seven Dwarfs (1937), his favourite fairy tale. Both men noted that (in Leavitt's words) he took "an especially keen pleasure in the scene where the Wicked Queen immerses her apple in the poisonous brew". Turing's remains were cremated at Woking Crematorium on 12 June 1954, and his ashes were scattered in the gardens of the crematorium, just as his father's had been. Philosopher Jack Copeland has questioned various aspects of the coroner's historical verdict. He suggested an alternative explanation for the cause of Turing's death: the accidental inhalation of cyanide fumes from an apparatus used to electroplate gold onto spoons. The potassium cyanide was used to dissolve the gold. Turing had such an apparatus set up in his tiny spare room. Copeland noted that the autopsy findings were more consistent with inhalation than with ingestion of the poison. Turing also habitually ate an apple before going to bed, and it was not unusual for the apple to be discarded half-eaten. Furthermore, Turing had reportedly borne his legal setbacks and hormone treatment (which had been discontinued a year previously) "with good humour" and had shown no sign of despondency before his death. He even set down a list of tasks that he intended to complete upon returning to his office after the holiday weekend. Turing's mother believed that the ingestion was accidental, resulting from her son's careless storage of laboratory chemicals. Biographer Andrew Hodges theorised that Turing deliberately left the nature of his death ambiguous in order to shield his mother from the knowledge that he had killed himself. It has been suggested that Turing's belief in fortune-telling may have caused his depressed mood. As a youth, Turing had been told by a fortune-teller that he would be a genius. In mid-May 1954, shortly before his death, Turing again decided to consult a fortune-teller during a day-trip to St Annes-on-Sea with the Greenbaum family. According to the Greenbaums' daughter, Barbara: Government apology and pardon In August 2009, British programmer John Graham-Cumming started a petition urging the British government to apologise for Turing's prosecution as a homosexual. The petition received more than 30,000 signatures. The prime minister, Gordon Brown, acknowledged the petition, releasing a statement on 10 September 2009 apologising and describing the treatment of Turing as "appalling": In December 2011, William Jones and his member of Parliament, John Leech, created an e-petition requesting that the British government pardon Turing for his conviction of "gross indecency": The petition gathered over 37,000 signatures, and was submitted to Parliament by the Manchester MP John Leech but the request was discouraged by Justice Minister Lord McNally, who said: John Leech, the MP for Manchester Withington (2005–15), submitted several bills to Parliament and led a high-profile campaign to secure the pardon. Leech made the case in the House of Commons that Turing's contribution to the war made him a national hero and that it was "ultimately just embarrassing" that the conviction still stood. Leech continued to take the bill through Parliament and campaigned for several years, gaining the public support of numerous leading scientists, including Stephen Hawking. At the British premiere of a film based on Turing's life, The Imitation Game, the producers thanked Leech for bringing the topic to public attention and securing Turing's pardon. Leech is now regularly described as the "architect" of Turing's pardon and subsequently the Alan Turing Law which went on to secure pardons for 75,000 other men and women convicted of similar crimes. On 26 July 2012, a bill was introduced in the House of Lords to grant a statutory pardon to Turing for offences under section 11 of the Criminal Law Amendment Act 1885, of which he was convicted on 31 March 1952. Late in the year in a letter to The Daily Telegraph, the physicist Stephen Hawking and 10 other signatories including the Astronomer Royal Lord Rees, President of the Royal Society Sir Paul Nurse, Lady Trumpington (who worked for Turing during the war) and Lord Sharkey (the bill's sponsor) called on Prime Minister David Cameron to act on the pardon request. The government indicated it would support the bill, and it passed its third reading in the House of Lords in October. At the bill's second reading in the House of Commons on 29 November 2013, Conservative MP Christopher Chope objected to the bill, delaying its passage. The bill was due to return to the House of Commons on 28 February 2014, but before the bill could be debated in the House of Commons, the government elected to proceed under the royal prerogative of mercy. On 24 December 2013, Queen Elizabeth II signed a pardon for Turing's conviction for "gross indecency", with immediate effect. Announcing the pardon, Lord Chancellor Chris Grayling said Turing deserved to be "remembered and recognised for his fantastic contribution to the war effort" and not for his later criminal conviction. The Queen officially pronounced Turing pardoned in August 2014. The Queen's action is only the fourth royal pardon granted since the conclusion of the Second World War. Pardons are normally granted only when the person is technically innocent, and a request has been made by the family or other interested party; neither condition was met in regard to Turing's conviction. In September 2016, the government announced its intention to expand this retroactive exoneration to other men convicted of similar historical indecency offences, in what was described as an "Alan Turing law". The Alan Turing law is now an informal term for the law in the United Kingdom, contained in the Policing and Crime Act 2017, which serves as an amnesty law to retroactively pardon men who were cautioned or convicted under historical legislation that outlawed homosexual acts. The law applies in England and Wales. Legacy Awards, honours, and tributes Turing was appointed an officer of the Order of the British Empire in 1946. He was also elected a Fellow of the Royal Society (FRS) in 1951. Turing has been honoured in various ways in Manchester, the city where he worked towards the end of his life. In 1994, a stretch of the A6010 road (the Manchester city intermediate ring road) was named "Alan Turing Way". A bridge carrying this road was widened, and carries the name Alan Turing Bridge. A statue of Turing was unveiled in Manchester on 23 June 2001 in Sackville Park, between the University of Manchester building on Whitworth Street and Canal Street. The memorial statue depicts the "father of computer science" sitting on a bench at a central position in the park, holding an apple. The cast bronze bench carries in relief the text "Alan Mathison Turing 1912–1954" and "IEKYF ROMSI ADXUO KVKZC GUBJ". The latter is described by the sculptor, Glyn Hughes, as "a motto as encoded by the German 'Enigma'". The original message is often given as "Founder of Computer Science", however this is unlikely as the Enigma ciphering system does not allow a letter to be enciphered to itself, while the fourteenth letter of that message (the "U" in "Computer") is the same as the fourteenth letter of the encoded inscription. A plaque at the statue's feet reads "Father of Computer Science, Mathematician, Logician, Wartime Codebreaker, Victim of Prejudice", followed by a Bertrand Russell quotation: "Mathematics, rightly viewed, possesses not only truth but supreme beauty, a beauty cold and austere like that of sculpture." The sculptor's own old Amstrad computer is buried under the statue as a tribute to "the godfather of all modern computer". In 1999, Time magazine named Turing as one of the 100 Most Important People of the 20th century and stated, "The fact remains that everyone who taps at a keyboard, opening a spreadsheet or a word-processing program, is working on an incarnation of a Turing machine." A blue plaque was unveiled at King's College, Cambridge on the centenary of his birth on 23 June 2012 and is now installed at the college's Keynes Building on King's Parade. A high steel sculpture, designed in Turing's honour by Sir Antony Gormley, is planned to be installed at King's College, but Historic England deemed the sculpture too abstract for the setting, saying that it "would result in harm, of a less than substantial nature, to the significance of the listed buildings and landscape, and by extension the conservation area". On 25 March 2021, the Bank of England publicly unveiled the design for a new £50 note, featuring Turing's portrait, before its official issue on 23 June, Turing's birthday. Turing was selected as the new face of the note in 2019 following a public nomination process. Centenary celebrations To mark the 100th anniversary of Turing's birth, the Turing Centenary Advisory Committee (TCAC) co-ordinated the Alan Turing Year in 2012, a year-long programme of events around the world honouring Turing's life and achievements. The TCAC, chaired by S. Barry Cooper with Turing's nephew Sir John Dermot Turing acting as Honorary President, worked with the University of Manchester faculty members and a broad spectrum of people from Cambridge University and Bletchley Park. Notes and references Notes References Sources in and Turing's mother, who survived him by many years, wrote this 157-page biography of her son, glorifying his life. It was published in 1959, and so could not cover his war work. Scarcely 300 copies were sold (Sara Turing to Lyn Newman, 1967, Library of St John's College, Cambridge). The six-page foreword by Lyn Irvine includes reminiscences and is more frequently quoted. It was re-published by Cambridge University Press in 2012, to honour the centenary of his birth, and included a new foreword by Martin Davis, as well as a never-before-published memoir by Turing's older brother John F. Turing. This 1986 Hugh Whitemore play tells the story of Turing's life and death. In the original West End and Broadway runs, Derek Jacobi played Turing and he recreated the role in a 1997 television film based on the play made jointly by the BBC and WGBH, Boston. The play is published by Amber Lane Press, Oxford, ASIN: B000B7TM0Q Further reading Articles Books (originally published in 1983); basis of the film The Imitation Game (originally published in 1959 by W. Heffer & Sons, Ltd) External links Oral history interview with Nicholas C. Metropolis, Charles Babbage Institute, University of Minnesota. Metropolis was the first director of computing services at Los Alamos National Laboratory; topics include the relationship between Turing and John von Neumann How Alan Turing Cracked The Enigma Code Imperial War Museums Alan Turing Year CiE 2012: Turing Centenary Conference Science in the Making Alan Turing's papers in the Royal Society's archives Alan Turing site maintained by Andrew Hodges including a short biography AlanTuring.net – Turing Archive for the History of Computing by Jack Copeland The Turing Archive – contains scans of some unpublished documents and material from the King's College, Cambridge archive Alan Turing Papers – University of Manchester Library, Manchester Sherborne School Archives – holds papers relating to Turing's time at Sherborne School Alan Turing plaques recorded on openplaques.org Alan Turing archive on New Scientist 1912 births 1954 suicides 20th-century English mathematicians 20th-century atheists 20th-century English philosophers Academics of the University of Manchester Academics of the University of Manchester Institute of Science and Technology Alumni of King's College, Cambridge Artificial intelligence researchers Bayesian statisticians Bletchley Park people British anti-fascists British cryptographers British people of World War II Computability theorists Computer designers English atheists English computer scientists English inventors English logicians English male long-distance runners English people of Irish descent English people of Scottish descent Fellows of King's College, Cambridge Fellows of the Royal Society Former Protestants Foreign Office personnel of World War II Gay academics Gay scientists Gay sportsmen GCHQ people History of computing in the United Kingdom LGBT-related suicides LGBT mathematicians LGBT philosophers British LGBT scientists English LGBT sportspeople LGBT track and field athletes Officers of the Order of the British Empire People educated at Sherborne School People from Maida Vale People from Wilmslow People convicted for homosexuality in the United Kingdom People who have received posthumous pardons Princeton University alumni Recipients of British royal pardons Theoretical biologists Theoretical computer scientists Deaths by cyanide poisoning Suicides by cyanide poisoning Suicides in England

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

Area

Area is the measure of a region's size on a surface. The area of a plane region or plane area refers to the area of a shape or planar lamina, while surface area refers to the area of an open surface or the boundary of a three-dimensional object. Area can be understood as the amount of material with a given thickness that would be necessary to fashion a model of the shape, or the amount of paint necessary to cover the surface with a single coat. It is the two-dimensional analogue of the length of a curve (a one-dimensional concept) or the volume of a solid (a three-dimensional concept). The area of a shape can be measured by comparing the shape to squares of a fixed size. In the International System of Units (SI), the standard unit of area is the square metre (written as m2), which is the area of a square whose sides are one metre long. A shape with an area of three square metres would have the same area as three such squares. In mathematics, the unit square is defined to have area one, and the area of any other shape or surface is a dimensionless real number. There are several well-known formulas for the areas of simple shapes such as triangles, rectangles, and circles. Using these formulas, the area of any polygon can be found by dividing the polygon into triangles. For shapes with curved boundary, calculus is usually required to compute the area. Indeed, the problem of determining the area of plane figures was a major motivation for the historical development of calculus. For a solid shape such as a sphere, cone, or cylinder, the area of its boundary surface is called the surface area. Formulas for the surface areas of simple shapes were computed by the ancient Greeks, but computing the surface area of a more complicated shape usually requires multivariable calculus. Area plays an important role in modern mathematics. In addition to its obvious importance in geometry and calculus, area is related to the definition of determinants in linear algebra, and is a basic property of surfaces in differential geometry. In analysis, the area of a subset of the plane is defined using Lebesgue measure, though not every subset is measurable. In general, area in higher mathematics is seen as a special case of volume for two-dimensional regions. Area can be defined through the use of axioms, defining it as a function of a collection of certain plane figures to the set of real numbers. It can be proved that such a function exists. Formal definition An approach to defining what is meant by "area" is through axioms. "Area" can be defined as a function from a collection M of a special kinds of plane figures (termed measurable sets) to the set of real numbers, which satisfies the following properties: For all S in M, . If S and T are in M then so are and , and also . If S and T are in M with then is in M and . If a set S is in M and S is congruent to T then T is also in M and . Every rectangle R is in M. If the rectangle has length h and breadth k then . Let Q be a set enclosed between two step regions S and T. A step region is formed from a finite union of adjacent rectangles resting on a common base, i.e. . If there is a unique number c such that for all such step regions S and T, then . It can be proved that such an area function actually exists. Units Every unit of length has a corresponding unit of area, namely the area of a square with the given side length. Thus areas can be measured in square metres (m2), square centimetres (cm2), square millimetres (mm2), square kilometres (km2), square feet (ft2), square yards (yd2), square miles (mi2), and so forth. Algebraically, these units can be thought of as the squares of the corresponding length units. The SI unit of area is the square metre, which is considered an SI derived unit. Conversions Calculation of the area of a square whose length and width are 1 metre would be: 1 metre × 1 metre = 1 m2 and so, a rectangle with different sides (say length of 3 metres and width of 2 metres) would have an area in square units that can be calculated as: 3 metres × 2 metres = 6 m2. This is equivalent to 6 million square millimetres. Other useful conversions are: 1 square kilometre = 1,000,000 square metres 1 square metre = 10,000 square centimetres = 1,000,000 square millimetres 1 square centimetre = 100 square millimetres. Non-metric units In non-metric units, the conversion between two square units is the square of the conversion between the corresponding length units. 1 foot = 12 inches, the relationship between square feet and square inches is 1 square foot = 144 square inches, where 144 = 122 = 12 × 12. Similarly: 1 square yard = 9 square feet 1 square mile = 3,097,600 square yards = 27,878,400 square feet In addition, conversion factors include: 1 square inch = 6.4516 square centimetres 1 square foot = square metres 1 square yard = square metres 1 square mile = square kilometres Other units including historical There are several other common units for area. The are was the original unit of area in the metric system, with: 1 are = 100 square metres Though the are has fallen out of use, the hectare is still commonly used to measure land: 1 hectare = 100 ares = 10,000 square metres = 0.01 square kilometres Other uncommon metric units of area include the tetrad, the hectad, and the myriad. The acre is also commonly used to measure land areas, where 1 acre = 4,840 square yards = 43,560 square feet. An acre is approximately 40% of a hectare. On the atomic scale, area is measured in units of barns, such that: 1 barn = 10−28 square meters. The barn is commonly used in describing the cross-sectional area of interaction in nuclear physics. In India, 20 dhurki = 1 dhur 20 dhur = 1 khatha 20 khata = 1 bigha 32 khata = 1 acre History Circle area In the 5th century BCE, Hippocrates of Chios was the first to show that the area of a disk (the region enclosed by a circle) is proportional to the square of its diameter, as part of his quadrature of the lune of Hippocrates, but did not identify the constant of proportionality. Eudoxus of Cnidus, also in the 5th century BCE, also found that the area of a disk is proportional to its radius squared. Subsequently, Book I of Euclid's Elements dealt with equality of areas between two-dimensional figures. The mathematician Archimedes used the tools of Euclidean geometry to show that the area inside a circle is equal to that of a right triangle whose base has the length of the circle's circumference and whose height equals the circle's radius, in his book Measurement of a Circle. (The circumference is 2r, and the area of a triangle is half the base times the height, yielding the area r2 for the disk.) Archimedes approximated the value of π (and hence the area of a unit-radius circle) with his doubling method, in which he inscribed a regular triangle in a circle and noted its area, then doubled the number of sides to give a regular hexagon, then repeatedly doubled the number of sides as the polygon's area got closer and closer to that of the circle (and did the same with circumscribed polygons). Swiss scientist Johann Heinrich Lambert in 1761 proved that π, the ratio of a circle's area to its squared radius, is irrational, meaning it is not equal to the quotient of any two whole numbers. In 1794, French mathematician Adrien-Marie Legendre proved that π2 is irrational; this also proves that π is irrational. In 1882, German mathematician Ferdinand von Lindemann proved that π is transcendental (not the solution of any polynomial equation with rational coefficients), confirming a conjecture made by both Legendre and Euler. Triangle area Heron (or Hero) of Alexandria found what is known as Heron's formula for the area of a triangle in terms of its sides, and a proof can be found in his book, Metrica, written around 60 CE. It has been suggested that Archimedes knew the formula over two centuries earlier, and since Metrica is a collection of the mathematical knowledge available in the ancient world, it is possible that the formula predates the reference given in that work. In 499 Aryabhata, a great mathematician-astronomer from the classical age of Indian mathematics and Indian astronomy, expressed the area of a triangle as one-half the base times the height in the Aryabhatiya (section 2.6). A formula equivalent to Heron's was discovered by the Chinese independently of the Greeks. It was published in 1247 in Shushu Jiuzhang ("Mathematical Treatise in Nine Sections"), written by Qin Jiushao. Quadrilateral area In the 7th century CE, Brahmagupta developed a formula, now known as Brahmagupta's formula, for the area of a cyclic quadrilateral (a quadrilateral inscribed in a circle) in terms of its sides. In 1842, the German mathematicians Carl Anton Bretschneider and Karl Georg Christian von Staudt independently found a formula, known as Bretschneider's formula, for the area of any quadrilateral. General polygon area The development of Cartesian coordinates by René Descartes in the 17th century allowed the development of the surveyor's formula for the area of any polygon with known vertex locations by Gauss in the 19th century. Areas determined using calculus The development of integral calculus in the late 17th century provided tools that could subsequently be used for computing more complicated areas, such as the area of an ellipse and the surface areas of various curved three-dimensional objects. Area formulas Polygon formulas For a non-self-intersecting (simple) polygon, the Cartesian coordinates (i=0, 1, ..., n-1) of whose n vertices are known, the area is given by the surveyor's formula: where when i=n-1, then i+1 is expressed as modulus n and so refers to 0. Rectangles The most basic area formula is the formula for the area of a rectangle. Given a rectangle with length and width , the formula for the area is:  (rectangle). That is, the area of the rectangle is the length multiplied by the width. As a special case, as in the case of a square, the area of a square with side length is given by the formula:  (square). The formula for the area of a rectangle follows directly from the basic properties of area, and is sometimes taken as a definition or axiom. On the other hand, if geometry is developed before arithmetic, this formula can be used to define multiplication of real numbers. Dissection, parallelograms, and triangles Most other simple formulas for area follow from the method of dissection. This involves cutting a shape into pieces, whose areas must sum to the area of the original shape. For an example, any parallelogram can be subdivided into a trapezoid and a right triangle, as shown in figure to the left. If the triangle is moved to the other side of the trapezoid, then the resulting figure is a rectangle. It follows that the area of the parallelogram is the same as the area of the rectangle:  (parallelogram). However, the same parallelogram can also be cut along a diagonal into two congruent triangles, as shown in the figure to the right. It follows that the area of each triangle is half the area of the parallelogram:  (triangle). Similar arguments can be used to find area formulas for the trapezoid as well as more complicated polygons. Area of curved shapes Circles The formula for the area of a circle (more properly called the area enclosed by a circle or the area of a disk) is based on a similar method. Given a circle of radius , it is possible to partition the circle into sectors, as shown in the figure to the right. Each sector is approximately triangular in shape, and the sectors can be rearranged to form an approximate parallelogram. The height of this parallelogram is , and the width is half the circumference of the circle, or . Thus, the total area of the circle is :  (circle). Though the dissection used in this formula is only approximate, the error becomes smaller and smaller as the circle is partitioned into more and more sectors. The limit of the areas of the approximate parallelograms is exactly , which is the area of the circle. This argument is actually a simple application of the ideas of calculus. In ancient times, the method of exhaustion was used in a similar way to find the area of the circle, and this method is now recognized as a precursor to integral calculus. Using modern methods, the area of a circle can be computed using a definite integral: Ellipses The formula for the area enclosed by an ellipse is related to the formula of a circle; for an ellipse with semi-major and semi-minor axes and the formula is: Non-planar surface area Most basic formulas for surface area can be obtained by cutting surfaces and flattening them out (see: developable surfaces). For example, if the side surface of a cylinder (or any prism) is cut lengthwise, the surface can be flattened out into a rectangle. Similarly, if a cut is made along the side of a cone, the side surface can be flattened out into a sector of a circle, and the resulting area computed. The formula for the surface area of a sphere is more difficult to derive: because a sphere has nonzero Gaussian curvature, it cannot be flattened out. The formula for the surface area of a sphere was first obtained by Archimedes in his work On the Sphere and Cylinder. The formula is:  (sphere), where is the radius of the sphere. As with the formula for the area of a circle, any derivation of this formula inherently uses methods similar to calculus. General formulas Areas of 2-dimensional figures A triangle: (where B is any side, and h is the distance from the line on which B lies to the other vertex of the triangle). This formula can be used if the height h is known. If the lengths of the three sides are known then Heron's formula can be used: where a, b, c are the sides of the triangle, and is half of its perimeter. If an angle and its two included sides are given, the area is where is the given angle and and are its included sides. If the triangle is graphed on a coordinate plane, a matrix can be used and is simplified to the absolute value of . This formula is also known as the shoelace formula and is an easy way to solve for the area of a coordinate triangle by substituting the 3 points (x1,y1), (x2,y2), and (x3,y3). The shoelace formula can also be used to find the areas of other polygons when their vertices are known. Another approach for a coordinate triangle is to use calculus to find the area. A simple polygon constructed on a grid of equal-distanced points (i.e., points with integer coordinates) such that all the polygon's vertices are grid points: , where i is the number of grid points inside the polygon and b is the number of boundary points. This result is known as Pick's theorem. Area in calculus The area between a positive-valued curve and the horizontal axis, measured between two values a and b (b is defined as the larger of the two values) on the horizontal axis, is given by the integral from a to b of the function that represents the curve: The area between the graphs of two functions is equal to the integral of one function, f(x), minus the integral of the other function, g(x): where is the curve with the greater y-value. An area bounded by a function expressed in polar coordinates is: The area enclosed by a parametric curve with endpoints is given by the line integrals: or the z-component of (For details, see .) This is the principle of the planimeter mechanical device. Bounded area between two quadratic functions To find the bounded area between two quadratic functions, we subtract one from the other to write the difference as where f(x) is the quadratic upper bound and g(x) is the quadratic lower bound. Define the discriminant of f(x)-g(x) as By simplifying the integral formula between the graphs of two functions (as given in the section above) and using Vieta's formula, we can obtain The above remains valid if one of the bounding functions is linear instead of quadratic. Surface area of 3-dimensional figures Cone: , where r is the radius of the circular base, and h is the height. That can also be rewritten as or where r is the radius and l is the slant height of the cone. is the base area while is the lateral surface area of the cone. Cube: , where s is the length of an edge. Cylinder: , where r is the radius of a base and h is the height. The can also be rewritten as , where d is the diameter. Prism: , where B is the area of a base, P is the perimeter of a base, and h is the height of the prism. pyramid: , where B is the area of the base, P is the perimeter of the base, and L is the length of the slant. Rectangular prism: , where is the length, w is the width, and h is the height. General formula for surface area The general formula for the surface area of the graph of a continuously differentiable function where and is a region in the xy-plane with the smooth boundary: An even more general formula for the area of the graph of a parametric surface in the vector form where is a continuously differentiable vector function of is: List of formulas The above calculations show how to find the areas of many common shapes. The areas of irregular (and thus arbitrary) polygons can be calculated using the "Surveyor's formula" (shoelace formula). Relation of area to perimeter The isoperimetric inequality states that, for a closed curve of length L (so the region it encloses has perimeter L) and for area A of the region that it encloses, and equality holds if and only if the curve is a circle. Thus a circle has the largest area of any closed figure with a given perimeter. At the other extreme, a figure with given perimeter L could have an arbitrarily small area, as illustrated by a rhombus that is "tipped over" arbitrarily far so that two of its angles are arbitrarily close to 0° and the other two are arbitrarily close to 180°. For a circle, the ratio of the area to the circumference (the term for the perimeter of a circle) equals half the radius r. This can be seen from the area formula πr2 and the circumference formula 2πr. The area of a regular polygon is half its perimeter times the apothem (where the apothem is the distance from the center to the nearest point on any side). Fractals Doubling the edge lengths of a polygon multiplies its area by four, which is two (the ratio of the new to the old side length) raised to the power of two (the dimension of the space the polygon resides in). But if the one-dimensional lengths of a fractal drawn in two dimensions are all doubled, the spatial content of the fractal scales by a power of two that is not necessarily an integer. This power is called the fractal dimension of the fractal. Area bisectors There are an infinitude of lines that bisect the area of a triangle. Three of them are the medians of the triangle (which connect the sides' midpoints with the opposite vertices), and these are concurrent at the triangle's centroid; indeed, they are the only area bisectors that go through the centroid. Any line through a triangle that splits both the triangle's area and its perimeter in half goes through the triangle's incenter (the center of its incircle). There are either one, two, or three of these for any given triangle. Any line through the midpoint of a parallelogram bisects the area. All area bisectors of a circle or other ellipse go through the center, and any chords through the center bisect the area. In the case of a circle they are the diameters of the circle. Optimization Given a wire contour, the surface of least area spanning ("filling") it is a minimal surface. Familiar examples include soap bubbles. The question of the filling area of the Riemannian circle remains open. The circle has the largest area of any two-dimensional object having the same perimeter. A cyclic polygon (one inscribed in a circle) has the largest area of any polygon with a given number of sides of the same lengths. A version of the isoperimetric inequality for triangles states that the triangle of greatest area among all those with a given perimeter is equilateral. The triangle of largest area of all those inscribed in a given circle is equilateral; and the triangle of smallest area of all those circumscribed around a given circle is equilateral. The ratio of the area of the incircle to the area of an equilateral triangle, , is larger than that of any non-equilateral triangle. The ratio of the area to the square of the perimeter of an equilateral triangle, is larger than that for any other triangle. See also Brahmagupta quadrilateral, a cyclic quadrilateral with integer sides, integer diagonals, and integer area. Equiareal map Heronian triangle, a triangle with integer sides and integer area. List of triangle inequalities One-seventh area triangle, an inner triangle with one-seventh the area of the reference triangle. Routh's theorem, a generalization of the one-seventh area triangle. Orders of magnitude—A list of areas by size. Derivation of the formula of a pentagon Planimeter, an instrument for measuring small areas, e.g. on maps. Area of a convex quadrilateral Robbins pentagon, a cyclic pentagon whose side lengths and area are all rational numbers. References External links

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https://en.wikipedia.org/wiki/Astronomical%20unit

Astronomical unit

The astronomical unit (symbol: au, or or AU) is a unit of length, roughly the distance from Earth to the Sun and approximately equal to or 8.3 light-minutes. The actual distance from Earth to the Sun varies by about 3% as Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once each year. The astronomical unit was originally conceived as the average of Earth's aphelion and perihelion; however, since 2012 it has been defined as exactly (see below for several conversions). The astronomical unit is used primarily for measuring distances within the Solar System or around other stars. It is also a fundamental component in the definition of another unit of astronomical length, the parsec. History of symbol usage A variety of unit symbols and abbreviations have been in use for the astronomical unit. In a 1976 resolution, the International Astronomical Union (IAU) had used the symbol A to denote a length equal to the astronomical unit. In the astronomical literature, the symbol AU was (and remains) common. In 2006, the International Bureau of Weights and Measures (BIPM) had recommended ua as the symbol for the unit. In the non-normative Annex C to ISO 80000-3:2006 (now withdrawn), the symbol of the astronomical unit was "ua". In 2012, the IAU, noting "that various symbols are presently in use for the astronomical unit", recommended the use of the symbol "au". The scientific journals published by the American Astronomical Society and the Royal Astronomical Society subsequently adopted this symbol. In the 2014 revision and 2019 edition of the SI Brochure, the BIPM used the unit symbol "au". ISO 80000-3:2019, which replaces ISO 80000-3:2006, does not mention the astronomical unit. Development of unit definition Earth's orbit around the Sun is an ellipse. The semi-major axis of this elliptic orbit is defined to be half of the straight line segment that joins the perihelion and aphelion. The centre of the Sun lies on this straight line segment, but not at its midpoint. Because ellipses are well-understood shapes, measuring the points of its extremes defined the exact shape mathematically, and made possible calculations for the entire orbit as well as predictions based on observation. In addition, it mapped out exactly the largest straight-line distance that Earth traverses over the course of a year, defining times and places for observing the largest parallax (apparent shifts of position) in nearby stars. Knowing Earth's shift and a star's shift enabled the star's distance to be calculated. But all measurements are subject to some degree of error or uncertainty, and the uncertainties in the length of the astronomical unit only increased uncertainties in the stellar distances. Improvements in precision have always been a key to improving astronomical understanding. Throughout the twentieth century, measurements became increasingly precise and sophisticated, and ever more dependent on accurate observation of the effects described by Einstein's theory of relativity and upon the mathematical tools it used. Improving measurements were continually checked and cross-checked by means of improved understanding of the laws of celestial mechanics, which govern the motions of objects in space. The expected positions and distances of objects at an established time are calculated (in au) from these laws, and assembled into a collection of data called an ephemeris. NASA Jet Propulsion Laboratory HORIZONS System provides one of several ephemeris computation services. In 1976, to establish an even precise measure for the astronomical unit, the IAU formally adopted a new definition. Although directly based on the then-best available observational measurements, the definition was recast in terms of the then-best mathematical derivations from celestial mechanics and planetary ephemerides. It stated that "the astronomical unit of length is that length (A) for which the Gaussian gravitational constant (k) takes the value when the units of measurement are the astronomical units of length, mass and time". Equivalently, by this definition, one au is "the radius of an unperturbed circular Newtonian orbit about the sun of a particle having infinitesimal mass, moving with an angular frequency of "; or alternatively that length for which the heliocentric gravitational constant (the product G) is equal to ()2 au3/d2, when the length is used to describe the positions of objects in the Solar System. Subsequent explorations of the Solar System by space probes made it possible to obtain precise measurements of the relative positions of the inner planets and other objects by means of radar and telemetry. As with all radar measurements, these rely on measuring the time taken for photons to be reflected from an object. Because all photons move at the speed of light in vacuum, a fundamental constant of the universe, the distance of an object from the probe is calculated as the product of the speed of light and the measured time. However, for precision the calculations require adjustment for things such as the motions of the probe and object while the photons are transiting. In addition, the measurement of the time itself must be translated to a standard scale that accounts for relativistic time dilation. Comparison of the ephemeris positions with time measurements expressed in Barycentric Dynamical Time (TDB) leads to a value for the speed of light in astronomical units per day (of ). By 2009, the IAU had updated its standard measures to reflect improvements, and calculated the speed of light at (TDB). In 1983, the CIPM modified the International System of Units (SI) to make the metre defined as the distance travelled in a vacuum by light in 1 /  second. This replaced the previous definition, valid between 1960 and 1983, which was that the metre equalled a certain number of wavelengths of a certain emission line of krypton-86. (The reason for the change was an improved method of measuring the speed of light.) The speed of light could then be expressed exactly as c0 = , a standard also adopted by the IERS numerical standards. From this definition and the 2009 IAU standard, the time for light to traverse an astronomical unit is found to be τA = , which is slightly more than 8 minutes 19 seconds. By multiplication, the best IAU 2009 estimate was A = c0τA = , based on a comparison of Jet Propulsion Laboratory and IAA–RAS ephemerides. In 2006, the BIPM reported a value of the astronomical unit as . In the 2014 revision of the SI Brochure, the BIPM recognised the IAU's 2012 redefinition of the astronomical unit as . This estimate was still derived from observation and measurements subject to error, and based on techniques that did not yet standardize all relativistic effects, and thus were not constant for all observers. In 2012, finding that the equalization of relativity alone would make the definition overly complex, the IAU simply used the 2009 estimate to redefine the astronomical unit as a conventional unit of length directly tied to the metre (exactly ). The new definition also recognizes as a consequence that the astronomical unit is now to play a role of reduced importance, limited in its use to that of a convenience in some applications. {| style="border-spacing:0" |- |rowspan=7 style="vertical-align:top; padding-right:0"|1 astronomical unit  |= metres (by definition) |- |= (exactly) |- |≈ |- |≈ light-seconds |- |≈ light-minutes |- |≈ |- |≈ |} This definition makes the speed of light, defined as exactly , equal to exactly  ×  ÷  or about  au/d, some 60 parts per trillion less than the 2009 estimate. Usage and significance With the definitions used before 2012, the astronomical unit was dependent on the heliocentric gravitational constant, that is the product of the gravitational constant, G, and the solar mass, . Neither G nor can be measured to high accuracy separately, but the value of their product is known very precisely from observing the relative positions of planets (Kepler's Third Law expressed in terms of Newtonian gravitation). Only the product is required to calculate planetary positions for an ephemeris, so ephemerides are calculated in astronomical units and not in SI units. The calculation of ephemerides also requires a consideration of the effects of general relativity. In particular, time intervals measured on Earth's surface (Terrestrial Time, TT) are not constant when compared with the motions of the planets: the terrestrial second (TT) appears to be longer near January and shorter near July when compared with the "planetary second" (conventionally measured in TDB). This is because the distance between Earth and the Sun is not fixed (it varies between and ) and, when Earth is closer to the Sun (perihelion), the Sun's gravitational field is stronger and Earth is moving faster along its orbital path. As the metre is defined in terms of the second and the speed of light is constant for all observers, the terrestrial metre appears to change in length compared with the "planetary metre" on a periodic basis. The metre is defined to be a unit of proper length, but the SI definition does not specify the metric tensor to be used in determining it. Indeed, the International Committee for Weights and Measures (CIPM) notes that "its definition applies only within a spatial extent sufficiently small that the effects of the non-uniformity of the gravitational field can be ignored". As such, the metre is undefined for the purposes of measuring distances within the Solar System. The 1976 definition of the astronomical unit was incomplete because it did not specify the frame of reference in which time is to be measured, but proved practical for the calculation of ephemerides: a fuller definition that is consistent with general relativity was proposed, and "vigorous debate" ensued until August 2012 when the IAU adopted the current definition of 1 astronomical unit = metres. The astronomical unit is typically used for stellar system scale distances, such as the size of a protostellar disk or the heliocentric distance of an asteroid, whereas other units are used for other distances in astronomy. The astronomical unit is too small to be convenient for interstellar distances, where the parsec and light-year are widely used. The parsec (parallax arcsecond) is defined in terms of the astronomical unit, being the distance of an object with a parallax of . The light-year is often used in popular works, but is not an approved non-SI unit and is rarely used by professional astronomers. When simulating a numerical model of the Solar System, the astronomical unit provides an appropriate scale that minimizes (overflow, underflow and truncation) errors in floating point calculations. History The book On the Sizes and Distances of the Sun and Moon, which is ascribed to Aristarchus, says the distance to the Sun is 18 to 20 times the distance to the Moon, whereas the true ratio is about . The latter estimate was based on the angle between the half-moon and the Sun, which he estimated as (the true value being close to ). Depending on the distance that van Helden assumes Aristarchus used for the distance to the Moon, his calculated distance to the Sun would fall between and Earth radii. According to Eusebius in the Praeparatio evangelica (Book XV, Chapter 53), Eratosthenes found the distance to the Sun to be "σταδιων μυριαδας τετρακοσιας και οκτωκισμυριας" (literally "of stadia myriads 400 and ) but with the additional note that in the Greek text the grammatical agreement is between myriads (not stadia) on the one hand and both 400 and on the other, as in Greek, unlike English, all three (or all four if one were to include stadia) words are inflected. This has been translated either as stadia (1903 translation by Edwin Hamilton Gifford), or as stadia (edition of , dated 1974–1991). Using the Greek stadium of 185 to 190 metres, the former translation comes to to , which is far too low, whereas the second translation comes to 148.7 to 152.8 million kilometres (accurate within 2%). Hipparchus also gave an estimate of the distance of Earth from the Sun, quoted by Pappus as equal to 490 Earth radii. According to the conjectural reconstructions of Noel Swerdlow and G. J. Toomer, this was derived from his assumption of a "least perceptible" solar parallax of . A Chinese mathematical treatise, the Zhoubi Suanjing (c. 1st century BCE), shows how the distance to the Sun can be computed geometrically, using the different lengths of the noontime shadows observed at three places li apart and the assumption that Earth is flat. In the 2nd century CE, Ptolemy estimated the mean distance of the Sun as times Earth's radius. To determine this value, Ptolemy started by measuring the Moon's parallax, finding what amounted to a horizontal lunar parallax of 1° 26′, which was much too large. He then derived a maximum lunar distance of Earth radii. Because of cancelling errors in his parallax figure, his theory of the Moon's orbit, and other factors, this figure was approximately correct. He then measured the apparent sizes of the Sun and the Moon and concluded that the apparent diameter of the Sun was equal to the apparent diameter of the Moon at the Moon's greatest distance, and from records of lunar eclipses, he estimated this apparent diameter, as well as the apparent diameter of the shadow cone of Earth traversed by the Moon during a lunar eclipse. Given these data, the distance of the Sun from Earth can be trigonometrically computed to be Earth radii. This gives a ratio of solar to lunar distance of approximately 19, matching Aristarchus's figure. Although Ptolemy's procedure is theoretically workable, it is very sensitive to small changes in the data, so much so that changing a measurement by a few per cent can make the solar distance infinite. After Greek astronomy was transmitted to the medieval Islamic world, astronomers made some changes to Ptolemy's cosmological model, but did not greatly change his estimate of the Earth–Sun distance. For example, in his introduction to Ptolemaic astronomy, al-Farghānī gave a mean solar distance of Earth radii, whereas in his zij, al-Battānī used a mean solar distance of Earth radii. Subsequent astronomers, such as al-Bīrūnī, used similar values. Later in Europe, Copernicus and Tycho Brahe also used comparable figures ( and Earth radii), and so Ptolemy's approximate Earth–Sun distance survived through the 16th century. Johannes Kepler was the first to realize that Ptolemy's estimate must be significantly too low (according to Kepler, at least by a factor of three) in his Rudolphine Tables (1627). Kepler's laws of planetary motion allowed astronomers to calculate the relative distances of the planets from the Sun, and rekindled interest in measuring the absolute value for Earth (which could then be applied to the other planets). The invention of the telescope allowed far more accurate measurements of angles than is possible with the naked eye. Flemish astronomer Godefroy Wendelin repeated Aristarchus’ measurements in 1635, and found that Ptolemy's value was too low by a factor of at least eleven. A somewhat more accurate estimate can be obtained by observing the transit of Venus. By measuring the transit in two different locations, one can accurately calculate the parallax of Venus and from the relative distance of Earth and Venus from the Sun, the solar parallax (which cannot be measured directly due to the brightness of the Sun). Jeremiah Horrocks had attempted to produce an estimate based on his observation of the 1639 transit (published in 1662), giving a solar parallax of , similar to Wendelin's figure. The solar parallax is related to the Earth–Sun distance as measured in Earth radii by The smaller the solar parallax, the greater the distance between the Sun and Earth: a solar parallax of is equivalent to an Earth–Sun distance of Earth radii. Christiaan Huygens believed that the distance was even greater: by comparing the apparent sizes of Venus and Mars, he estimated a value of about Earth radii, equivalent to a solar parallax of . Although Huygens' estimate is remarkably close to modern values, it is often discounted by historians of astronomy because of the many unproven (and incorrect) assumptions he had to make for his method to work; the accuracy of his value seems to be based more on luck than good measurement, with his various errors cancelling each other out. Jean Richer and Giovanni Domenico Cassini measured the parallax of Mars between Paris and Cayenne in French Guiana when Mars was at its closest to Earth in 1672. They arrived at a figure for the solar parallax of , equivalent to an Earth–Sun distance of about Earth radii. They were also the first astronomers to have access to an accurate and reliable value for the radius of Earth, which had been measured by their colleague Jean Picard in 1669 as toises. This same year saw another estimate for the astronomical unit by John Flamsteed, which accomplished it alone by measuring the martian diurnal parallax. Another colleague, Ole Rømer, discovered the finite speed of light in 1676: the speed was so great that it was usually quoted as the time required for light to travel from the Sun to the Earth, or "light time per unit distance", a convention that is still followed by astronomers today. A better method for observing Venus transits was devised by James Gregory and published in his Optica Promata (1663). It was strongly advocated by Edmond Halley and was applied to the transits of Venus observed in 1761 and 1769, and then again in 1874 and 1882. Transits of Venus occur in pairs, but less than one pair every century, and observing the transits in 1761 and 1769 was an unprecedented international scientific operation including observations by James Cook and Charles Green from Tahiti. Despite the Seven Years' War, dozens of astronomers were dispatched to observing points around the world at great expense and personal danger: several of them died in the endeavour. The various results were collated by Jérôme Lalande to give a figure for the solar parallax of . Karl Rudolph Powalky had made an estimate of in 1864. Another method involved determining the constant of aberration. Simon Newcomb gave great weight to this method when deriving his widely accepted value of for the solar parallax (close to the modern value of ), although Newcomb also used data from the transits of Venus. Newcomb also collaborated with A. A. Michelson to measure the speed of light with Earth-based equipment; combined with the constant of aberration (which is related to the light time per unit distance), this gave the first direct measurement of the Earth–Sun distance in kilometres. Newcomb's value for the solar parallax (and for the constant of aberration and the Gaussian gravitational constant) were incorporated into the first international system of astronomical constants in 1896, which remained in place for the calculation of ephemerides until 1964. The name "astronomical unit" appears first to have been used in 1903. The discovery of the near-Earth asteroid 433 Eros and its passage near Earth in 1900–1901 allowed a considerable improvement in parallax measurement. Another international project to measure the parallax of 433 Eros was undertaken in 1930–1931. Direct radar measurements of the distances to Venus and Mars became available in the early 1960s. Along with improved measurements of the speed of light, these showed that Newcomb's values for the solar parallax and the constant of aberration were inconsistent with one another. Developments The unit distance (the value of the astronomical unit in metres) can be expressed in terms of other astronomical constants: where is the Newtonian constant of gravitation, is the solar mass, is the numerical value of Gaussian gravitational constant and is the time period of one day. The Sun is constantly losing mass by radiating away energy, so the orbits of the planets are steadily expanding outward from the Sun. This has led to calls to abandon the astronomical unit as a unit of measurement. As the speed of light has an exact defined value in SI units and the Gaussian gravitational constant is fixed in the astronomical system of units, measuring the light time per unit distance is exactly equivalent to measuring the product × in SI units. Hence, it is possible to construct ephemerides entirely in SI units, which is increasingly becoming the norm. A 2004 analysis of radiometric measurements in the inner Solar System suggested that the secular increase in the unit distance was much larger than can be accounted for by solar radiation, + metres per century. The measurements of the secular variations of the astronomical unit are not confirmed by other authors and are quite controversial. Furthermore, since 2010, the astronomical unit has not been estimated by the planetary ephemerides. Examples The following table contains some distances given in astronomical units. It includes some examples with distances that are normally not given in astronomical units, because they are either too short or far too long. Distances normally change over time. Examples are listed by increasing distance. See also Orders of magnitude (length) References Further reading External links The IAU and astronomical units Recommendations concerning Units (HTML version of the IAU Style Manual) Chasing Venus, Observing the Transits of Venus Transit of Venus Celestial mechanics Unit Units of length

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

Artist

An artist is a person engaged in an activity related to creating art, practicing the arts, or demonstrating an art. The common usage in both everyday speech and academic discourse refers to a practitioner in the visual arts only. However, the term is also often used in the entertainment business, especially in a business context, for musicians and other performers (although less often for actors). "Artiste" (French for artist) is a variant used in English in this context, but this use has become rare. Use of the term "artist" to describe writers is valid, but less common, and mostly restricted to contexts like used in criticism. Dictionary definitions The Oxford English Dictionary defines the older broad meanings of the term "artist": A learned person or Master of Arts. One who pursues a practical science, traditionally medicine, astrology, alchemy, chemistry. A follower of a pursuit in which skill comes by study or practice. A follower of a manual art, such as a mechanic. One who makes their craft a fine art. One who cultivates one of the fine arts – traditionally the arts presided over by the muses. History of the term The Greek word "", often translated as "art," implies mastery of any sort of craft. The adjectival Latin form of the word, "", became the source of the English words technique, technology, and technical. In Greek culture, each of the nine Muses oversaw a different field of human creation: Calliope (the 'beautiful of speech'): chief of the muses and muse of epic or heroic poetry Clio (the 'glorious one'): muse of history Erato (the 'amorous one'): muse of love or erotic poetry, lyrics, and marriage songs Euterpe (the 'well-pleasing'): muse of music and lyric poetry Melpomene (the 'chanting one'): muse of tragedy Polyhymnia or Polymnia (the '[singer] of many hymns'): muse of sacred song, oratory, lyric, singing, and rhetoric Terpsichore (the '[one who] delights in dance'): muse of choral song and dance Thalia (the 'blossoming one'): muse of comedy and bucolic poetry Urania (the 'celestial one'): muse of astronomy No muse was identified with the visual arts of painting and sculpture. In ancient Greece sculptors and painters were held in low regard, somewhere between freemen and slaves, their work regarded as mere manual labour. The word art derives from the Latin "" (stem art-), which, although literally defined means "skill method" or "technique", also conveys a connotation of beauty. During the Middle Ages the word artist already existed in some countries such as Italy, but the meaning was something resembling craftsman, while the word artisan was still unknown. An artist was someone able to do a work better than others, so the skilled excellency was underlined, rather than the activity field. In this period, some "artisanal" products (such as textiles) were much more precious and expensive than paintings or sculptures. The first division into major and minor arts dates back at least to the works of Leon Battista Alberti (1404–1472): De re aedificatoria, De statua, De pictura, which focused on the importance of the intellectual skills of the artist rather than the manual skills (even if in other forms of art there was a project behind). With the academies in Europe (second half of 16th century) the gap between fine and applied arts was definitely set. Many contemporary definitions of "artist" and "art" are highly contingent on culture, resisting aesthetic prescription, in much the same way that the features constituting beauty and the beautiful cannot be standardized easily without moving into kitsch. Training and employment The US Bureau of Labor Statistics classifies many visual artists as either craft artists or fine artists. A craft artist makes handmade functional works of art, such as pottery or clothing. A fine artist makes paintings, illustrations (such as book illustrations or medical illustrations), sculptures, or similar artistic works primarily for their aesthetic value. The main source of skill for both craft artists and fine artists is long-term repetition and practice. Many fine artists have studied their art form at university, and some have a master's degree in fine arts. Artists may also study on their own or receive on-the-job training from an experienced artist. The number of available jobs as an artist is increasing more slowly than other fields. About half of US artists are self-employed. Others work in a variety of industries. For example, a pottery manufacturer will employ craft artists, and book publishers will hire illustrators. In the US, fine artists have a median income of approximately US$50,000 per year, and craft artists have a median income of approximately US$33,000 per year. This compares to US$61,000 for all art-related fields, including related jobs such as graphic designers, multimedia artists, animators, and fashion designers. Many artists work part-time as artists and hold a second job. See also Art Art history Arts by region Artist in Residence Fine art Humanities List of painters by name List of painters List of composers List of sculptors List of sketches of notable people by Marguerite Martyn Mathematics and art Social science Notes References P.Galloni, Il sacro artefice. Mitologie degli artigiani medievali, Laterza, Bari, 1998 C. T. Onions (1991). The Shorter Oxford English Dictionary. Clarendon Press Oxford. External links Aesthetics Art occupations Arts-related lists Humanities occupations Artisans

1213

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

Actaeon

Actaeon (; Aktaion), in Greek mythology, son of the priestly herdsman Aristaeus and Autonoe in Boeotia, was a famous Theban hero. Like Achilles in a later generation, he was trained by the centaur Chiron. He fell to the fatal wrath of Artemis, but the surviving details of his transgression vary: "the only certainty is in what Aktaion suffered, his pathos, and what Artemis did: the hunter became the hunted; he was transformed into a stag, and his raging hounds, struck with a 'wolf's frenzy' (Lyssa), tore him apart as they would a stag." This is the iconic motif by which Actaeon is recognized, both in ancient art and in Renaissance and post-Renaissance depictions. The plot Among others, John Heath has observed, "The unalterable kernel of the tale was a hunter's transformation into a deer and his death in the jaws of his hunting dogs. But authors were free to suggest different motives for his death." In the version that was offered by the Hellenistic poet Callimachus, which has become the standard setting, Artemis was bathing in the woods when the hunter Actaeon stumbled across her, thus seeing her naked. He stopped and stared, amazed at her ravishing beauty. Once seen, Artemis got revenge on Actaeon: she forbade him speech — if he tried to speak, he would be changed into a stag — for the unlucky profanation of her virginity's mystery. Upon hearing the call of his hunting party, he cried out to them and immediately transformed. At this he fled deep into the woods, and doing so he came upon a pond and, seeing his reflection, groaned. His own hounds then turned upon him and pursued him, not recognizing him. In an endeavour to save himself, he raised his eyes (and would have raised his arms, had he had them) toward Mount Olympus. The gods did not heed his plea, and he was torn to pieces. An element of the earlier myth made Actaeon the familiar hunting companion of Artemis, no stranger. In an embroidered extension of the myth, the hounds were so upset with their master's death, that Chiron made a statue so lifelike that the hounds thought it was Actaeon. There are various other versions of his transgression: The Hesiodic Catalogue of Women and pseudo-Apollodoran Bibliotheke state that his offense was that he was a rival of Zeus for Semele, his mother's sister, whereas in Euripides' Bacchae he has boasted that he is a better hunter than Artemis: Further materials, including fragments that belong with the Hesiodic Catalogue of Women and at least four Attic tragedies, including a Toxotides of Aeschylus, have been lost. Diodorus Siculus (4.81.4), in a variant of Actaeon's hubris that has been largely ignored, has it that Actaeon wanted to marry Artemis. Other authors say the hounds were Artemis' own; some lost elaborations of the myth seem to have given them all names and narrated their wanderings after his loss. According to the Latin version of the story told by the Roman Ovid having accidentally seen Diana (Artemis) on Mount Cithaeron while she was bathing, he was changed by her into a stag, and pursued and killed by his fifty hounds. This version also appears in Callimachus' Fifth Hymn, as a mythical parallel to the blinding of Tiresias after he sees Athena bathing. The literary testimony of Actaeon's myth is largely lost, but Lamar Ronald Lacy, deconstructing the myth elements in what survives and supplementing it by iconographic evidence in late vase-painting, made a plausible reconstruction of an ancient Actaeon myth that Greek poets may have inherited and subjected to expansion and dismemberment. His reconstruction opposes a too-pat consensus that has an archaic Actaeon aspiring to Semele, a classical Actaeon boasting of his hunting prowess and a Hellenistic Actaeon glimpsing Artemis' bath. Lacy identifies the site of Actaeon's transgression as a spring sacred to Artemis at Plataea where Actaeon was a hero archegetes ("hero-founder") The righteous hunter, the companion of Artemis, seeing her bathing naked in the spring, was moved to try to make himself her consort, as Diodorus Siculus noted, and was punished, in part for transgressing the hunter's "ritually enforced deference to Artemis" (Lacy 1990:42). Names of dogs Notes: Names of dogs were verified to correspond to the list given in Ovid's text where the names were already transliterated. ? = Seven listed names of dogs in Hyginus' Fabulae, was probably misread or misinterpreted by later authors because it does not correspond to the exact numbers and names given by Ovid: Arcas signifies Arcadia, place of origin of three dogs namely Pamphagos, Dorceus and Oribasus Cyprius means Cyprus, where the dogs Lysisca and Harpalos originated Gnosius can be read as Knossus in Crete, which signify that Ichnobates was a Knossian breed of dog Echnobas, Elion, Aura and Therodanapis were probably place names or adjectives defining the characteristics of dogs The "bed of Actaeon" In the second century AD, the traveller Pausanias was shown a spring on the road in Attica leading to Plataea from Eleutherae, just beyond Megara "and a little farther on a rock. It is called the bed of Actaeon, for it is said that he slept thereon when weary with hunting and that into this spring he looked while Artemis was bathing in it." Parallels in Akkadian and Ugarit poems In the standard version of the Epic of Gilgamesh (tablet vi) there is a parallel, in the series of examples Gilgamesh gives Ishtar of her mistreatment of her serial lovers: You loved the herdsman, shepherd and chief shepherd Who was always heaping up the glowing ashes for you, And cooked ewe-lambs for you every day. But you hit him and turned him into a wolf, His own herd-boys hunt him down And his dogs tear at his haunches. Actaeon, torn apart by dogs incited by Artemis, finds another Near Eastern parallel in the Ugaritic hero Aqht, torn apart by eagles incited by Anath who wanted his hunting bow. The virginal Artemis of classical times is not directly comparable to Ishtar of the many lovers, but the mytheme of Artemis shooting Orion, was linked to her punishment of Actaeon by T.C.W. Stinton;<ref>Stinton "Euripides and the Judgement of Paris" (London, 1965:45 note 14) reprinted in Stinton, Collected Papers on Greek Tragedy (London, 1990:51 note 14).</ref> the Greek context of the mortal's reproach to the amorous goddess is translated to the episode of Anchises and Aphrodite. Daphnis too was a herdsman loved by a goddess and punished by her: see Theocritus' First Idyll. Symbolism regarding Actaeon In Greek Mythology, Actaeon is widely thought to symbolize ritual human sacrifice in attempt to please a God or Goddess: the dogs symbolize the sacrificers and Actaeon symbolizes the sacrifice. Actaeon may symbolize human curiosity or irreverence. The myth is seen by Jungian psychologist Wolfgang Giegerich as a symbol of spiritual transformation and/or enlightenment. Actaeon often symbolizes a cuckold, as when he is turned into a stag, he becomes "horned". This is alluded to in Shakespeare's Merry Wives, Robert Burton's Anatomy of Melancholy, and others.Gordon Williams, A Dictionary of Sexual Language and Imagery in Shakespearean and Stuart Literature, 2001, , p. 8-9 Cultural depictions The two main scenes are Actaeon surprising Artemis/Diana, and his death. In classical art Actaeon is normally shown as fully human, even as his hounds are killing him (sometimes he has small horns), but in Renaissance art he is often given a deer's head with antlers even in the scene with Diana, and by the time he is killed he has at the least this head, and has often completely transformed into the shape of a deer. Aeschylus and other tragic poets made use of the story, which was a favourite subject in ancient works of art. There is a well-known small marble group in the British Museum illustrative of the story, in gallery 83/84. Two paintings by the 16th century painter Titian (Death of Actaeon and Diana and Actaeon).Actéon, an operatic pastorale by Marc-Antoine Charpentier. Percy Bysshe Shelley suggests a parallel between his alter-ego and Actaeon in his elegy for John Keats, Adonais, stanza 31 ('[he] had gazed on Nature's naked loveliness/ Actaeon-like, and now he fled astray/ .../ And his own thoughts, along that rugged way,/ Pursued, like raging hounds, their father and their prey.') The aria "Oft she visits this lone mountain" from Purcell's Dido and Aeneas, first performed in 1689 or earlier. Giordano Bruno, "Gli Eroici Furori". In canto V of Giambattista Marino's poem "Adone" the protagonist goes to theater to see a tragedy representing the myth of Actaeon. This episode foreshadows the protagonist's violent death at the end of the book. In Act I Scene 2 of Jacques Offenbach's Orpheus in the Underworld, Actaeon is Diana (Artemis)'s lover, and it is Jupiter who turns him into a stag, which puts Diana off hunting. His story is relinquished at this point, in favour of the other plots. Ted Hughes wrote a version of the story in his Tales from Ovid. In Alexandre Dumas' novel La Reine Margot, Charles IX of France, fond of the hunt, has a much-loved and ill-fated hunting dog named Actaeon. Diane and Actéon Pas de Deux from Marius Petipa's ballet, Le Roi Candaule, to the music by Riccardo Drigo and Cesare Pugni, later incorporated into the second act of La Esmeralda (ballet). In Twelfth Night by William Shakespeare, Orsino compares his unrequited love for Olivia to the fate of Actaeon. "O, when mine eyes did see Olivia first, Methought she purged the air of pestilence, That instant was I turned into a hart, and my desires like fell and cruel hounds e'er since pursue me." Act 1 Scene 1. In Christopher Marlowe's play Edward II, courtier Piers Gaveston seeks to entertain his lover, King Edward II of England, by presenting a play based on the Actaeon myth. In Gaveston's version, Diane is played by a naked boy holding an olive branch to hide his loins, and it is the boy-Diane who transforms Actaeon into a hart and lets him be devoured by the hounds. Thus, Gaveston's (and Marlowe's) interpretation adds a strong element of homoeroticism, absent from the original myth. Paul Manship in 1925 created a set of copper statute of Diane and Actaeon, which in the Luce Lunder Smithsonian Institution. Diana at Her Bath by Pierre Klossovski (1956) Aktaion Energy is the name of a local conglomerate with ties to the Dome event and The Hounds of Diana is a Dome conspiracy/Aktaion Energy watchdog website run by a member of Aktaion's IT department who goes by the alias Dromas. French based collective LFKs and his film/theatre director, writer and visual artist Jean Michel Bruyere produced a series of 600 shorts and "medium" films, an interactive 360° installation, Si poteris narrare licet ("if you are able to speak of it, then you may do so") in 2002, a 3D 360° installation La Dispersion du Fils (from 2008 to 2016) and an outdoor performance, "Une Brutalité pastorale" (2000) all about the myth of Diana and Actaeon. Actaeon and his dogs make an appearance in Diana Wynne Jones's novel The Game, in which the main character encounters various mythological figures while wandering the mythosphere. The Actaeon myth is incorporated into Rachael Craw's 2018 novel The Rift. In Matthew Barney's 2019 movie Redoubt set in the Sawtooth Mountains of the U.S. state of Idaho and an accompanying traveling art exhibition originating at the Yale University Art Gallery the myth is retold by the visual artist and filmmaker via avenues of his own design. Symphonic poem (1915) by the Romanian composer & conductor Alfred Alessandrescu (1893-1959). Royal House of Thebes family tree Notes ReferencesThe Oxford Classical Dictionary, s.v. "Actaeon". Ovid, Metamorphoses, 3.138ff. Euripides, Bacchae'', 337–340. Diodorus Siculus, 4.81.4. External links The Warburg Institute Iconographic Database: ca 230 images of Actaeon Actaeon by Fabio F. Centamore Deaths due to dog attacks Mythological Greek archers Metamorphoses characters Metamorphoses into animals in Greek mythology Deeds of Artemis Deeds of Zeus Dogs in art Inanna Anat

1214

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

Anglicanism

Anglicanism is a Western Christian tradition that has developed from the practices, liturgy, and identity of the Church of England following the English Reformation, in the context of the Protestant Reformation in Europe. It is one of the largest branches of Christianity, with around 110 million adherents worldwide . Adherents of Anglicanism are called Anglicans; they are also called Episcopalians in some countries. The majority of Anglicans are members of national or regional ecclesiastical provinces of the international Anglican Communion, which forms the third-largest Christian communion in the world, after the Roman Catholic Church and the Eastern Orthodox Church. These provinces are in full communion with the See of Canterbury and thus with the Archbishop of Canterbury, whom the communion refers to as its primus inter pares (Latin, 'first among equals'). The Archbishop calls the decennial Lambeth Conference, chairs the meeting of primates, and is the president of the Anglican Consultative Council. Some churches that are not part of the Anglican Communion or recognised by it, also call themselves Anglican, including those that are within the Continuing Anglican movement and Anglican realignment. Anglicans base their Christian faith on the Bible, traditions of the apostolic church, apostolic succession ("historic episcopate"), and the writings of the Church Fathers. Anglicanism forms one of the branches of Western Christianity, having definitively declared its independence from the Holy See at the time of the Elizabethan Religious Settlement. Many of the new Anglican formularies of the mid-16th century corresponded closely to those of historical Protestantism. These reforms in the Church of England were understood by one of those most responsible for them, Thomas Cranmer, the Archbishop of Canterbury, and others as navigating a middle way between two of the emerging Protestant traditions, namely Lutheranism and Calvinism. In the first half of the 17th century, the Church of England and its associated Church of Ireland were presented by some Anglican divines as comprising a distinct Christian tradition, with theologies, structures, and forms of worship representing a different kind of middle way, or via media, between Protestantism and Catholicism – a perspective that came to be highly influential in later theories of Anglican identity and expressed in the description of Anglicanism as "catholic and reformed". The degree of distinction between Protestant and Catholic tendencies within the Anglican tradition is routinely a matter of debate both within specific Anglican churches and throughout the Anglican Communion. Unique to Anglicanism is the Book of Common Prayer, the collection of services in one prayer book used for centuries. The book is acknowledged as a principal tie which binds the Anglican Communion together as a liturgical rather than a confessional tradition or one possessing a magisterium as in the Roman Catholic Church. After the American Revolution, Anglican congregations in the United States and British North America (which would later form the basis for the modern country of Canada) were each reconstituted into autonomous churches with their own bishops and self-governing structures; these were known as the American Episcopal Church and the Church of England in the Dominion of Canada. Through the expansion of the British Empire and the activity of Christian missions, this model was adopted as the model for many newly formed churches, especially in Africa, Australasia, and the Asia-Pacific. In the 19th century, the term Anglicanism was coined to describe the common religious tradition of these churches; as also that of the Scottish Episcopal Church, which, though originating earlier within the Church of Scotland, had come to be recognised as sharing this common identity. Terminology The word Anglican originates in , a phrase from the Magna Carta dated 15 June 1215, meaning "the Anglican Church shall be free". Adherents of Anglicanism are called Anglicans. As an adjective, "Anglican" is used to describe the people, institutions, and churches, as well as the liturgical traditions and theological concepts developed by the Church of England. As a noun, an Anglican is a member of a church in the Anglican Communion. The word is also used by followers of separated groups which have left the communion or have been founded separately from it, although this is considered as a misuse by the Anglican Communion. The word Anglicanism came into being in the 19th century. The word originally referred only to the teachings and rites of Christians throughout the world in communion with the see of Canterbury, but has come to sometimes be extended to any church following those traditions rather than actual membership in the modern Anglican Communion. Although the term Anglican is found referring to the Church of England as far back as the 16th century, its use did not become general until the latter half of the 19th century. In British parliamentary legislation referring to the English Established Church, there is no need for a description; it is simply the Church of England, though the word "Protestant" is used in many legal acts specifying the succession to the Crown and qualifications for office. When the Union with Ireland Act created the United Church of England and Ireland, it is specified that it shall be one "Protestant Episcopal Church", thereby distinguishing its form of church government from the Presbyterian polity that prevails in the Church of Scotland. The word Episcopal is preferred in the title of the Episcopal Church (the province of the Anglican Communion covering the United States) and the Scottish Episcopal Church, though the full name of the former is The Protestant Episcopal Church in the United States of America. Elsewhere, however, the term "Anglican Church" came to be preferred as it distinguished these churches from others that maintain an episcopal polity. Definition Anglicanism, in its structures, theology, and forms of worship, is commonly understood as a distinct Christian tradition representing a middle ground between what are perceived to be the extremes of the claims of 16th-century Roman Catholicism and the Lutheran and Reformed varieties of Protestantism of that era. As such, it is often referred to as being a via media (or "middle way") between these traditions. The faith of Anglicans is founded in the Scriptures and the Gospels, the traditions of the Apostolic Church, the historical episcopate, the first four ecumenical councils, and the early Church Fathers (among these councils, especially the premier four ones, and among these Fathers, especially those active during the five initial centuries of Christianity, according to the quinquasaecularist principle proposed by the English bishop Lancelot Andrewes and the Lutheran dissident Georg Calixtus). Anglicans understand the Old and New Testaments as "containing all things necessary for salvation" and as being the rule and ultimate standard of faith. Reason and tradition are seen as valuable means to interpret scripture (a position first formulated in detail by Richard Hooker), but there is no full mutual agreement among Anglicans about exactly how scripture, reason, and tradition interact (or ought to interact) with each other. Anglicans understand the Apostles' Creed as the baptismal symbol and the Nicene Creed as the sufficient statement of the Christian faith. Anglicans believe the catholic and apostolic faith is revealed in Holy Scripture and the Catholic creeds and interpret these in light of the Christian tradition of the historic church, scholarship, reason, and experience. Anglicans celebrate the traditional sacraments, with special emphasis being given to the Eucharist, also called Holy Communion, the Lord's Supper or the Mass. The Eucharist is central to worship for most Anglicans as a communal offering of prayer and praise in which the life, death, and resurrection of Jesus Christ are proclaimed through prayer, reading of the Bible, singing, giving God thanks over the bread and wine for the innumerable benefits obtained through the passion of Christ, the breaking of the bread, the blessing of the cup, and the partaking of the body and blood of Christ as instituted at the Last Supper, however one wished to define the Presence. The consecrated bread and wine, which are the true body and blood of Christ after a spiritual manner, are outward symbols of an inner grace given by Christ, which to the repentant conveys forgiveness and cleaning from sin. While many Anglicans celebrate the Eucharist in similar ways to the predominant western Catholic tradition, a considerable degree of liturgical freedom is permitted, and worship styles range from the simple to elaborate. Unique to Anglicanism is the Book of Common Prayer (BCP), the collection of services that worshippers in most Anglican churches have used for centuries. It was called common prayer originally because it was intended for use in all Church of England churches, which had previously followed differing local liturgies. The term was kept when the church became international, because all Anglicans used to share in its use around the world. In 1549, the first Book of Common Prayer was compiled by Thomas Cranmer, who was then Archbishop of Canterbury. While it has since undergone many revisions and Anglican churches in different countries have developed other service books, the Prayer Book is still acknowledged as one of the ties that bind Anglicans together. Identity Early history The founding of Christianity in Britain is commonly attributed to Joseph of Arimathea, according to Anglican legend, and is commemorated in Glastonbury Abbey. Many of the early Church Fathers wrote of the presence of Christianity in Roman Britain, with Tertullian stating "those parts of Britain into which the Roman arms had never penetrated were become subject to Christ". Saint Alban, who was executed in AD 209, is the first Christian martyr in the British Isles. For this reason he is venerated as the British protomartyr. The historian Heinrich Zimmer writes that "Just as Britain was a part of the Roman Empire, so the British Church formed (during the fourth century) a branch of the Catholic Church of the West; and during the whole of that century, from the Council of Arles (316) onward, took part in all proceedings concerning the Church." After Roman troops withdrew from Britain, the "absence of Roman military and governmental influence and overall decline of Roman imperial political power enabled Britain and the surrounding isles to develop distinctively from the rest of the West. A new culture emerged around the Irish Sea among the Celtic peoples with Celtic Christianity at its core. What resulted was a form of Christianity distinct from Rome in many traditions and practices." The historian Charles Thomas, in addition to the Celticist Heinrich Zimmer, writes that the distinction between sub-Roman and post-Roman Insular Christianity, also known as Celtic Christianity, began to become apparent around AD 475, with the Celtic churches allowing married clergy, observing Lent and Easter according to their own calendar, and having a different tonsure; moreover, like the Eastern Orthodox and the Oriental Orthodox Churches, the Celtic churches operated independently of the Pope's authority, as a result of their isolated development in the British Isles. In what is known as the Gregorian mission, Pope Gregory I sent Augustine of Canterbury to the British Isles in AD 596, with the purpose of evangelising the pagans there (who were largely Anglo-Saxons), as well as to reconcile the Celtic churches in the British Isles to the See of Rome. In Kent, Augustine persuaded the Anglo-Saxon king "Æthelberht and his people to accept Christianity". Augustine, on two occasions, "met in conference with members of the Celtic episcopacy, but no understanding was reached between them." Eventually, the "Christian Church of the Anglo-Saxon kingdom of Northumbria convened the Synod of Whitby in 663/664 to decide whether to follow Celtic or Roman usages." This meeting, with King Oswiu as the final decision maker, "led to the acceptance of Roman usage elsewhere in England and brought the English Church into close contact with the Continent". As a result of assuming Roman usages, the Celtic Church surrendered its independence, and, from this point on, the Church in England "was no longer purely Celtic, but became Anglo-Roman-Celtic". The theologian Christopher L. Webber writes that, although "the Roman form of Christianity became the dominant influence in Britain as in all of western Europe, Anglican Christianity has continued to have a distinctive quality because of its Celtic heritage." The Church in England remained united with Rome until the English Parliament, through the Act of Supremacy (1534), declared King Henry VIII to be the Supreme Head of the Church of England to fulfill the "English desire to be independent from continental Europe religiously and politically." As the change was mostly political, done in order to allow for the annulment of Henry VIII's marriage, the English Church under Henry VIII continued to maintain Roman Catholic doctrines and the sacraments despite the separation from Rome. With little exception, Henry VIII allowed no changes during his lifetime. Under King Edward VI (1547–1553), however, the church in England underwent what is known as the English Reformation, in the course of which it acquired a number of characteristics that would subsequently become recognised as constituting its distinctive "Anglican" identity. Development With the Elizabethan Settlement of 1559, the Protestant identity of the English and Irish churches was affirmed by means of parliamentary legislation which mandated allegiance and loyalty to the English Crown in all their members. The Elizabethan church began to develop distinct religious traditions, assimilating some of the theology of Reformed churches with the services in the Book of Common Prayer (which drew extensively on the Sarum Rite native to England), under the leadership and organisation of a continuing episcopate. Over the years, these traditions themselves came to command adherence and loyalty. The Elizabethan Settlement stopped the radical Protestant tendencies under Edward VI by combining the more radical elements of the Second Prayer Book of 1552 with the conservative "Catholic" First Prayer Book of 1549. From then on, Protestantism was in a "state of arrested development", regardless of the attempts to detach the Church of England from its "idiosyncratic anchorage in the medieval past" by various groups which tried to push it towards a more Reformed theology and governance in the years 1560–1660. Although two important constitutive elements of what later would emerge as Anglicanism were present in 1559 – scripture, the historic episcopate, the Book of Common Prayer, the teachings of the First Four Ecumenical Councils as the yardstick of catholicity, the teaching of the Church Fathers and Catholic bishops, and informed reason – neither the laypeople nor the clergy perceived themselves as Anglicans at the beginning of Elizabeth I's reign, as there was no such identity. Neither does the term via media appear until the 1627 to describe a church which refused to identify itself definitely as Catholic or Protestant, or as both, "and had decided in the end that this is virtue rather than a handicap". Historical studies on the period 1560–1660 written before the late 1960s tended to project the predominant conformist spirituality and doctrine of the 1660s on the ecclesiastical situation one hundred years before, and there was also a tendency to take polemically binary partitions of reality claimed by contestants studied (such as the dichotomies Protestant-"Popish" or "Laudian"-"Puritan") at face value. Since the late 1960s, these interpretations have been criticised. Studies on the subject written during the last forty-five years have, however, not reached any consensus on how to interpret this period in English church history. The extent to which one or several positions concerning doctrine and spirituality existed alongside the more well-known and articulate Puritan movement and the Durham House Party, and the exact extent of continental Calvinism among the English elite and among the ordinary churchgoers from the 1560s to the 1620s are subjects of current and ongoing debate. In 1662, under King Charles II, a revised Book of Common Prayer was produced, which was acceptable to high churchmen as well as some Puritans, and is still considered authoritative to this day. In so far as Anglicans derived their identity from both parliamentary legislation and ecclesiastical tradition, a crisis of identity could result wherever secular and religious loyalties came into conflict – and such a crisis indeed occurred in 1776 with the American Declaration of Independence, most of whose signatories were, at least nominally, Anglican. For these American patriots, even the forms of Anglican services were in doubt, since the Prayer Book rites of Matins, Evensong, and Holy Communion all included specific prayers for the British Royal Family. Consequently, the conclusion of the War of Independence eventually resulted in the creation of two new Anglican churches, the Episcopal Church in the United States in those states that had achieved independence; and in the 1830s The Church of England in Canada became independent from the Church of England in those North American colonies which had remained under British control and to which many Loyalist churchmen had migrated. Reluctantly, legislation was passed in the British Parliament (the Consecration of Bishops Abroad Act 1786) to allow bishops to be consecrated for an American church outside of allegiance to the British Crown (since no dioceses had ever been established in the former American colonies). Both in the United States and in Canada, the new Anglican churches developed novel models of self-government, collective decision-making, and self-supported financing; that would be consistent with separation of religious and secular identities. In the following century, two further factors acted to accelerate the development of a distinct Anglican identity. From 1828 and 1829, Dissenters and Catholics could be elected to the House of Commons, which consequently ceased to be a body drawn purely from the established churches of Scotland, England, and Ireland; but which nevertheless, over the following ten years, engaged in extensive reforming legislation affecting the interests of the English and Irish churches; which, by the Acts of Union of 1800, had been reconstituted as the United Church of England and Ireland. The propriety of this legislation was bitterly contested by the Oxford Movement (Tractarians), who in response developed a vision of Anglicanism as religious tradition deriving ultimately from the ecumenical councils of the patristic church. Those within the Church of England opposed to the Tractarians, and to their revived ritual practices, introduced a stream of bills in parliament aimed to control innovations in worship. This only made the dilemma more acute, with consequent continual litigation in the secular and ecclesiastical courts. Over the same period, Anglican churches engaged vigorously in Christian missions, resulting in the creation, by the end of the century, of over ninety colonial bishoprics, which gradually coalesced into new self-governing churches on the Canadian and American models. However, the case of John Colenso, Bishop of Natal, reinstated in 1865 by the English Judicial Committee of the Privy Council over the heads of the Church in South Africa, demonstrated acutely that the extension of episcopacy had to be accompanied by a recognised Anglican ecclesiology of ecclesiastical authority, distinct from secular power. Consequently, at the instigation of the bishops of Canada and South Africa, the first Lambeth Conference was called in 1867; to be followed by further conferences in 1878 and 1888, and thereafter at ten-year intervals. The various papers and declarations of successive Lambeth Conferences have served to frame the continued Anglican debate on identity, especially as relating to the possibility of ecumenical discussion with other churches. This ecumenical aspiration became much more of a possibility, as other denominational groups rapidly followed the example of the Anglican Communion in founding their own transnational alliances: the Alliance of Reformed Churches, the Ecumenical Methodist Council, the International Congregational Council, and the Baptist World Alliance. Theories Anglicanism was seen as a middle way, or via media, between two branches of Protestantism, Lutheranism and Reformed Christianity. In their rejection of absolute parliamentary authority, the Tractarians – and in particular John Henry Newman – looked back to the writings of 17th-century Anglican divines, finding in these texts the idea of the English church as a via media between the Protestant and Catholic traditions. This view was associated – especially in the writings of Edward Bouverie Pusey – with the theory of Anglicanism as one of three "branches" (alongside the Roman Catholic Church and the Orthodox Church) historically arising out of the common tradition of the earliest ecumenical councils. Newman himself subsequently rejected his theory of the via media, as essentially historicist and static and hence unable to accommodate any dynamic development within the church. Nevertheless, the aspiration to ground Anglican identity in the writings of the 17th-century divines and in faithfulness to the traditions of the Church Fathers reflects a continuing theme of Anglican ecclesiology, most recently in the writings of Henry Robert McAdoo. The Tractarian formulation of the theory of the via media between Protestantism and Roman Catholicism was essentially a party platform, and not acceptable to Anglicans outside the confines of the Oxford Movement. However, this theory of the via media was reworked in the ecclesiological writings of Frederick Denison Maurice, in a more dynamic form that became widely influential. Both Maurice and Newman saw the Church of England of their day as sorely deficient in faith; but whereas Newman had looked back to a distant past when the light of faith might have appeared to burn brighter, Maurice looked forward to the possibility of a brighter revelation of faith in the future. Maurice saw the Protestant and Catholic strands within the Church of England as contrary but complementary, both maintaining elements of the true church, but incomplete without the other; such that a true catholic and evangelical church might come into being by a union of opposites. Central to Maurice's perspective was his belief that the collective elements of family, nation, and church represented a divine order of structures through which God unfolds his continuing work of creation. Hence, for Maurice, the Protestant tradition had maintained the elements of national distinction which were amongst the marks of the true universal church, but which had been lost within contemporary Roman Catholicism in the internationalism of centralised papal authority. Within the coming universal church that Maurice foresaw, national churches would each maintain the six signs of Catholicity: baptism, Eucharist, the creeds, Scripture, an episcopal ministry, and a fixed liturgy (which could take a variety of forms in accordance with divinely ordained distinctions in national characteristics). Not surprisingly, this vision of a becoming universal church as a congregation of autonomous national churches proved highly congenial in Anglican circles; and Maurice's six signs were adapted to form the Chicago-Lambeth Quadrilateral of 1888. In the latter decades of the 20th century, Maurice's theory, and the various strands of Anglican thought that derived from it, have been criticised by Stephen Sykes, who argues that the terms Protestant and Catholic as used in these approaches are synthetic constructs denoting ecclesiastic identities unacceptable to those to whom the labels are applied. Hence, the Catholic Church does not regard itself as a party or strand within the universal church – but rather identifies itself as the universal church. Moreover, Sykes criticises the proposition, implicit in theories of via media, that there is no distinctive body of Anglican doctrines, other than those of the universal church; accusing this of being an excuse not to undertake systematic doctrine at all. Contrariwise, Sykes notes a high degree of commonality in Anglican liturgical forms and in the doctrinal understandings expressed within those liturgies. He proposes that Anglican identity might rather be found within a shared consistent pattern of prescriptive liturgies, established and maintained through canon law, and embodying both a historic deposit of formal statements of doctrine, and also framing the regular reading and proclamation of scripture. Sykes nevertheless agrees with those heirs of Maurice who emphasise the incompleteness of Anglicanism as a positive feature, and quotes with qualified approval the words of Michael Ramsey: Doctrine "Catholic and reformed" The distinction between Reformed and Catholic, and the coherence of the two, is a matter of debate within the Anglican Communion. The Oxford Movement of the mid-19th century revived and extended doctrinal, liturgical, and pastoral practices similar to those of Roman Catholicism. This extends beyond the ceremony of high church services to even more theologically significant territory, such as sacramental theology (see Anglican sacraments). While Anglo-Catholic practices, particularly liturgical ones, have become more common within the tradition over the last century, there are also places where practices and beliefs resonate more closely with the evangelical movements of the 1730s (see Sydney Anglicanism). Guiding principles For high-church Anglicans, doctrine is neither established by a magisterium, nor derived from the theology of an eponymous founder (such as Calvinism), nor summed up in a confession of faith beyond the ecumenical creeds (such as the Lutheran Book of Concord). For them, the earliest Anglican theological documents are its prayer books, which they see as the products of profound theological reflection, compromise, and synthesis. They emphasise the Book of Common Prayer as a key expression of Anglican doctrine. The principle of looking to the prayer books as a guide to the parameters of belief and practice is called by the Latin name lex orandi, lex credendi ("the law of prayer is the law of belief"). Within the prayer books are the fundamentals of Anglican doctrine: the Apostles' and Nicene creeds, the Athanasian Creed (now rarely used), the scriptures (via the lectionary), the sacraments, daily prayer, the catechism, and apostolic succession in the context of the historic threefold ministry. For some low-church and evangelical Anglicans, the 16th-century Reformed Thirty-Nine Articles form the basis of doctrine. Distinctives of Anglican belief The Thirty-Nine Articles played a significant role in Anglican doctrine and practice. Following the passing of the 1604 canons, all Anglican clergy had to formally subscribe to the articles. Today, however, the articles are no longer binding, but are seen as a historical document which has played a significant role in the shaping of Anglican identity. The degree to which each of the articles has remained influential varies. On the doctrine of justification, for example, there is a wide range of beliefs within the Anglican Communion, with some Anglo-Catholics arguing for a faith with good works and the sacraments. At the same time, however, some evangelical Anglicans ascribe to the Reformed emphasis on sola fide ("faith alone") in their doctrine of justification (see Sydney Anglicanism). Still other Anglicans adopt a nuanced view of justification, taking elements from the early Church Fathers, Catholicism, Protestantism, liberal theology, and latitudinarian thought. Arguably, the most influential of the original articles has been Article VI on the "sufficiency of scripture", which says that "Scripture containeth all things necessary to salvation: so that whatsoever is not read therein, nor may be proved thereby, is not to be required of any man, that it should be believed as an article of the Faith, or be thought requisite or necessary to salvation." This article has informed Anglican biblical exegesis and hermeneutics since earliest times. Anglicans look for authority in their "standard divines" (see below). Historically, the most influential of these – apart from Cranmer – has been the 16th-century cleric and theologian Richard Hooker, who after 1660 was increasingly portrayed as the founding father of Anglicanism. Hooker's description of Anglican authority as being derived primarily from scripture, informed by reason (the intellect and the experience of God) and tradition (the practices and beliefs of the historical church), has influenced Anglican self-identity and doctrinal reflection perhaps more powerfully than any other formula. The analogy of the "three-legged stool" of scripture, reason, and tradition is often incorrectly attributed to Hooker. Rather, Hooker's description is a hierarchy of authority, with scripture as foundational and reason and tradition as vitally important, but secondary, authorities. Finally, the extension of Anglicanism into non-English cultures, the growing diversity of prayer books, and the increasing interest in ecumenical dialogue have led to further reflection on the parameters of Anglican identity. Many Anglicans look to the Chicago-Lambeth Quadrilateral of 1888 as the sine qua non of communal identity. In brief, the quadrilateral's four points are the scriptures as containing all things necessary to salvation; the creeds (specifically, the Apostles' and Nicene Creeds) as the sufficient statement of Christian faith; the dominical sacraments of Baptism and Holy Communion; and the historic episcopate. Divines Within the Anglican tradition, "divines" are clergy of the Church of England whose theological writings have been considered standards for faith, doctrine, worship, and spirituality, and whose influence has permeated the Anglican Communion in varying degrees through the years. While there is no authoritative list of these Anglican divines, there are some whose names would likely be found on most lists – those who are commemorated in lesser feasts of the Anglican churches and those whose works are frequently anthologised. The corpus produced by Anglican divines is diverse. What they have in common is a commitment to the faith as conveyed by scripture and the Book of Common Prayer, thus regarding prayer and theology in a manner akin to that of the Apostolic Fathers. On the whole, Anglican divines view the via media of Anglicanism not as a compromise, but as "a positive position, witnessing to the universality of God and God's kingdom working through the fallible, earthly ecclesia Anglicana". These theologians regard scripture as interpreted through tradition and reason as authoritative in matters concerning salvation. Reason and tradition, indeed, is extant in and presupposed by scripture, thus implying co-operation between God and humanity, God and nature, and between the sacred and secular. Faith is thus regarded as incarnational and authority as dispersed. Amongst the early Anglican divines of the 16th and 17th centuries, the names of Thomas Cranmer, John Jewel, Matthew Parker, Richard Hooker, Lancelot Andrewes, and Jeremy Taylor predominate. The influential character of Hooker's Of the Laws of Ecclesiastical Polity cannot be overestimated. Published in 1593 and subsequently, Hooker's eight-volume work is primarily a treatise on church-state relations, but it deals comprehensively with issues of biblical interpretation, soteriology, ethics, and sanctification. Throughout the work, Hooker makes clear that theology involves prayer and is concerned with ultimate issues and that theology is relevant to the social mission of the church. The 18th century saw the rise of two important movements in Anglicanism: Cambridge Platonism, with its mystical understanding of reason as the "candle of the Lord", and the evangelical revival, with its emphasis on the personal experience of the Holy Spirit. The Cambridge Platonist movement evolved into a school called Latitudinarianism, which emphasised reason as the barometer of discernment and took a stance of indifference towards doctrinal and ecclesiological differences. The evangelical revival, influenced by such figures as John Wesley and Charles Simeon, re-emphasised the importance of justification through faith and the consequent importance of personal conversion. Some in this movement, such as Wesley and George Whitefield, took the message to the United States, influencing the First Great Awakening and creating an Anglo-American movement called Methodism that would eventually break away, structurally, from the Anglican churches after the American Revolution. By the 19th century, there was a renewed interest in pre-Reformation English religious thought and practice. Theologians such as John Keble, Edward Bouverie Pusey, and John Henry Newman had widespread influence in the realm of polemics, homiletics and theological and devotional works, not least because they largely repudiated the old high-church tradition and replaced it with a dynamic appeal to antiquity which looked beyond the Reformers and Anglican formularies. Their work is largely credited with the development of the Oxford Movement, which sought to reassert Catholic identity and practice in Anglicanism. In contrast to this movement, clergy such as the Bishop of Liverpool, J. C. Ryle, sought to uphold the distinctly Reformed identity of the Church of England. He was not a servant of the status quo, but argued for a lively religion which emphasised grace, holy and charitable living, and the plain use of the 1662 Book of Common Prayer (interpreted in a partisan evangelical way) without additional rituals. Frederick Denison Maurice, through such works as The Kingdom of Christ, played a pivotal role in inaugurating another movement, Christian socialism. In this, Maurice transformed Hooker's emphasis on the incarnational nature of Anglican spirituality to an imperative for social justice. In the 19th century, Anglican biblical scholarship began to assume a distinct character, represented by the so-called "Cambridge triumvirate" of Joseph Lightfoot, F. J. A. Hort, and Brooke Foss Westcott. Their orientation is best summed up by Westcott's observation that "Life which Christ is and which Christ communicates, the life which fills our whole beings as we realise its capacities, is active fellowship with God." The earlier part of the 20th century is marked by Charles Gore, with his emphasis on natural revelation, and William Temple's focus on Christianity and society, while, from outside England, Robert Leighton, Archbishop of Glasgow, and several clergy from the United States have been suggested, such as William Porcher DuBose, John Henry Hobart (1775–1830, Bishop of New York 1816–30), William Meade, Phillips Brooks, and Charles Brent. Churchmanship Churchmanship can be defined as the manifestation of theology in the realms of liturgy, piety and, to some extent, spirituality. Anglican diversity in this respect has tended to reflect the diversity in the tradition's Reformed and Catholic identity. Different individuals, groups, parishes, dioceses and provinces may identify more closely with one or the other, or some mixture of the two. The range of Anglican belief and practice became particularly divisive during the 19th century, when some clergy were disciplined and even imprisoned on charges of introducing illegal ritual while, at the same time, others were criticised for engaging in public worship services with ministers of Reformed churches. Resistance to the growing acceptance and restoration of traditional Catholic ceremonial by the mainstream of Anglicanism ultimately led to the formation of small breakaway churches such as the Free Church of England in England (1844) and the Reformed Episcopal Church in North America (1873). Anglo-Catholic (and some broad-church) Anglicans celebrate public liturgy in ways that understand worship to be something very special and of utmost importance. Vestments are worn by the clergy, sung settings are often used, and incense may be used. Nowadays, in most Anglican churches, the Eucharist is celebrated in a manner similar to the usage of Roman Catholics and some Lutherans, though, in many churches, more traditional, "pre–Vatican II" models of worship are common (e.g., an "eastward orientation" at the altar). Whilst many Anglo-Catholics derive much of their liturgical practice from that of the pre-Reformation English church, others more closely follow traditional Roman Catholic practices. The Eucharist may sometimes be celebrated in the form known as High Mass, with a priest, deacon and subdeacon (usually actually a layman) dressed in traditional vestments, with incense and sanctus bells and prayers adapted from the Roman Missal or other sources by the celebrant. Such churches may also have forms of eucharistic adoration such as Benediction of the Blessed Sacrament. In terms of personal piety, some Anglicans may recite the Rosary and Angelus, be involved in a devotional society dedicated to "Our Lady" (the Blessed Virgin Mary) and seek the intercession of the saints. In recent decades, the prayer books of several provinces have, out of deference to a greater agreement with Eastern Conciliarism (and a perceived greater respect accorded Anglicanism by Eastern Orthodoxy than by Roman Catholicism), instituted a number of historically Eastern and Oriental Orthodox elements in their liturgies, including introduction of the Trisagion and deletion of the filioque clause from the Nicene Creed. For their part, those evangelical (and some broad-church) Anglicans who emphasise the more Protestant aspects of the Church stress the Reformation theme of salvation by grace through faith. They emphasise the two dominical sacraments of Baptism and Eucharist, viewing the other five as "lesser rites". Some evangelical Anglicans may even tend to take the inerrancy of scripture literally, adopting the view of Article VI that it contains all things necessary to salvation in an explicit sense. Worship in churches influenced by these principles tends to be significantly less elaborate, with greater emphasis on the Liturgy of the Word (the reading of the scriptures, the sermon, and the intercessory prayers). The Order for Holy Communion may be celebrated bi-weekly or monthly (in preference to the daily offices), by priests attired in choir habit, or more regular clothes, rather than Eucharistic vestments. Ceremony may be in keeping with their view of the provisions of the 17th-century Puritans – being a Reformed interpretation of the Ornaments Rubric – no candles, no incense, no bells, and a minimum of manual actions by the presiding celebrant (such as touching the elements at the Words of Institution). In recent decades, there has been a growth of charismatic worship among Anglicans. Both Anglo-Catholics and evangelicals have been affected by this movement such that it is not uncommon to find typically charismatic postures, music, and other themes evident during the services of otherwise Anglo-Catholic or evangelical parishes. The spectrum of Anglican beliefs and practice is too large to be fit into these labels. Many Anglicans locate themselves somewhere in the spectrum of the broad-church tradition and consider themselves an amalgam of evangelical and Catholic. Such Anglicans stress that Anglicanism is the via media (middle way) between the two major strains of Western Christianity and that Anglicanism is like a "bridge" between the two strains. Sacramental doctrine and practice In accord with its prevailing self-identity as a via media or "middle path" of Western Christianity, Anglican sacramental theology expresses elements in keeping with its status as being both a church in the Catholic tradition as well as a Reformed church. With respect to sacramental theology, the Catholic heritage is perhaps most strongly asserted in the importance Anglicanism places on the sacraments as a means of grace, sanctification, and salvation, as expressed in the church's liturgy and doctrine. Of the seven sacraments, all Anglicans recognise Baptism and the Eucharist as being directly instituted by Christ. The other five – Confession/Absolution, Matrimony, Confirmation, Holy Orders (also called Ordination), and Anointing of the Sick (also called Unction) – are regarded variously as full sacraments by Anglo-Catholics and many high church and some broad-church Anglicans, but merely as "sacramental rites" by other broad-church and low-church Anglicans, especially evangelicals associated with Reform UK and the Diocese of Sydney. Eucharistic theology Anglican eucharistic theology is divergent in practice, reflecting the essential comprehensiveness of the tradition. A few low-church Anglicans take a strictly memorialist (Zwinglian) view of the sacrament. In other words, they see Holy Communion as a memorial to Christ's suffering, and participation in the Eucharist as both a re-enactment of the Last Supper and a foreshadowing of the heavenly banquet – the fulfilment of the eucharistic promise. Other low-church Anglicans believe in the real presence of Christ in the Eucharist but deny that the presence of Christ is carnal or is necessarily localised in the bread and wine. Despite explicit criticism in the Thirty-Nine Articles, many high-church or Anglo-Catholic Anglicans hold, more or less, the Catholic view of the real presence as expressed in the doctrine of transubstantiation, seeing the Eucharist as a liturgical representation of Christ's atoning sacrifice with the elements actually transformed into Christ's body and blood. The majority of Anglicans, however, have in common a belief in the real presence, defined in one way or another. To that extent, they are in the company of the continental reformer Martin Luther and Calvin rather than Ulrich Zwingli. The Catechism of the American BCP of 1976 repeats the standard Anglican view ("The outward and visible sign in the Eucharist is the bread and wine"..."The inward and spiritual grace in the Holy Communion is the Body and Blood of Christ given to his people, and received by faith") without further definition. It should be remembered that Anglicanism has no official doctrine on this matter, believing it is wiser to leave the Presence a mystery. The faithful can believe privately whatever explanation they favour, be it transubstantiation, consubstantiation, receptionism, or virtualism (the two most congenial to Anglicans for centuries until the Oxford Movement), each of which espouses belief in the real presence in one way or another, or memorialism, which has never been an option with Anglicans. A famous Anglican aphorism regarding Christ's presence in the sacrament, commonly misattributed to Queen Elizabeth I, is first found in print in a poem by John Donne: He was the word that spake it, He took the bread and brake it: And what that word did make it, I do believe and take it. An Anglican position on the eucharistic sacrifice ("Sacrifice of the Mass") was expressed in the response Saepius officio of the Archbishops of Canterbury and York to Pope Leo XIII's Papal Encyclical Apostolicae curae: viz. that the Prayer Book contained a strong sacrificial theology. Later revisions of the Prayer Book influenced by the Scottish Canon of 1764 first adopted by the Protestant Episcopal Church in 1789 made this assertion quite evident: "we do make and celebrate before thy Divine Majesty with these thy holy gifts, which we now OFFER unto thee, the memorial thy Son has commanded us to make", which is repeated in the 1929 English BCP and included in such words or others such as "present" or "show forth" in subsequent revisions. Anglican and Roman Catholic representatives declared that they had "substantial agreement on the doctrine of the Eucharist" in the Windsor Statement on Eucharistic Doctrine by the Anglican-Roman Catholic International Consultation (1971) and the Elucidation of the ARCIC Windsor Statement (1979). The final response (1991) to these documents by the Vatican made it plain that it did not consider the degree of agreement reached to be satisfactory. Practices In Anglicanism, there is a distinction between liturgy, which is the formal public and communal worship of the Church, and personal prayer and devotion, which may be public or private. Liturgy is regulated by the prayer books and consists of the Holy Eucharist (some call it Holy Communion or Mass), the other six Sacraments, and the Divine Office or Liturgy of the Hours. Book of Common Prayer The Book of Common Prayer (BCP) is the foundational prayer book of Anglicanism. The original book of 1549 (revised in 1552) was one of the instruments of the English Reformation, replacing the various "uses" or rites in Latin that had been used in different parts of the country with a single compact volume in the language of the people, so that "now from henceforth all the Realm shall have but one use". Suppressed under Queen Mary I, it was revised in 1559, and then again in 1662, after the Restoration of Charles II. This version was made mandatory in England and Wales by the Act of Uniformity and was in standard use until the mid-20th century. With British colonial expansion from the 17th century onwards, Anglican churches were planted around the globe. These churches at first used and then revised the Book of Common Prayer until they, like their parent church, produced prayer books which took into account the developments in liturgical study and practice in the 19th and 20th centuries, which come under the general heading of the Liturgical Movement. Worship Anglican worship services are open to all visitors. Anglican worship originates principally in the reforms of Thomas Cranmer, who aimed to create a set order of service like that of the pre-Reformation church but less complex in its seasonal variety and said in English rather than Latin. This use of a set order of service is not unlike the Catholic tradition. Traditionally, the pattern was that laid out in the Book of Common Prayer. Although many Anglican churches now use a wide range of modern service books written in the local language, the structures of the Book of Common Prayer are largely retained. Churches which call themselves Anglican will have identified themselves so because they use some form or variant of the Book of Common Prayer in the shaping of their worship. Anglican worship, however, is as diverse as Anglican theology. A contemporary "low-church" service may differ little from the worship of many mainstream non-Anglican Protestant churches. The service is constructed around a sermon focused on Biblical exposition and opened with one or more Bible readings and closed by a series of prayers (both set and extemporised) and hymns or songs. A "high church" or Anglo-Catholic service, by contrast, is usually a more formal liturgy celebrated by clergy in distinctive vestments and may be almost indistinguishable from a Roman Catholic service, often resembling the "pre–Vatican II" Tridentine rite. Between these extremes are a variety of styles of worship, often involving a robed choir and the use of the organ to accompany the singing and to provide music before and after the service. Anglican churches tend to have pews or chairs, and it is usual for the congregation to kneel for some prayers but to stand for hymns and other parts of the service such as the Gloria, Collect, Gospel reading, Creed and either the Preface or all of the Eucharistic Prayer. Anglicans may genuflect or cross themselves in the same way as Roman Catholics. Other more traditional Anglicans tend to follow the 1662 Book of Common Prayer, and retain the use of the King James Bible. This is typical in many Anglican cathedrals and particularly in Royal Peculiars such as the Savoy Chapel and the Queen's Chapel. These services reflect older Anglican liturgies and differ from the Traditional Anglican Communion in that they are in favour of women priests and the ability of clergy to marry. These Anglican church services include classical music instead of songs, hymns from the New English Hymnal (usually excluding modern hymns such as "Lord of the Dance"), and are generally non-evangelical and formal in practice. Until the mid-20th century the main Sunday service was typically morning prayer, but the Eucharist has once again become the standard form of Sunday worship in many Anglican churches; this again is similar to Roman Catholic practice. Other common Sunday services include an early morning Eucharist without music, an abbreviated Eucharist following a service of morning prayer, and a service of evening prayer, sometimes in the form of sung Evensong, usually celebrated between 3 and 6 pm. The late-evening service of Compline was revived in parish use in the early 20th century. Many Anglican churches will also have daily morning and evening prayer, and some have midweek or even daily celebration of the Eucharist. An Anglican service (whether or not a Eucharist) will include readings from the Bible that are generally taken from a standardised lectionary, which provides for much of the Bible (and some passages from the Apocrypha) to be read out loud in the church over a cycle of one, two, or three years (depending on which eucharistic and office lectionaries are used, respectively). The sermon (or homily) is typically about ten to twenty minutes in length, often comparably short to sermons in evangelical churches. Even in the most informal Anglican services, it is common for set prayers such as the weekly Collect to be read. There are also set forms for intercessory prayer, though this is now more often extemporaneous. In high and Anglo-Catholic churches there are generally prayers for the dead. Although Anglican public worship is usually ordered according to the canonically approved services, in practice many Anglican churches use forms of service outside these norms. Liberal churches may use freely structured or experimental forms of worship, including patterns borrowed from ecumenical traditions such as those of the Taizé Community or the Iona Community. Anglo-Catholic parishes might use the modern Roman Catholic liturgy of the Mass or more traditional forms, such as the Tridentine Mass (which is translated into English in the English Missal), the Anglican Missal, or, less commonly, the Sarum Rite. Catholic devotions such as the Rosary, Angelus, and Benediction of the Blessed Sacrament are also common among Anglo-Catholics. Eucharistic discipline Only baptised persons are eligible to receive communion, although in many churches communion is restricted to those who have not only been baptised but also confirmed. In many Anglican provinces, however, all baptised Christians are now often invited to receive communion and some dioceses have regularised a system for admitting baptised young people to communion before they are confirmed. The discipline of fasting before communion is practised by some Anglicans. Most Anglican priests require the presence of at least one other person for the celebration of the Eucharist (referring back to Christ's statement in Matthew 18:20, "When two or more are gathered in my name, I will be in the midst of them."), though some Anglo-Catholic priests (like Roman Catholic priests) may say private Masses. As in the Roman Catholic Church, it is a canonical requirement to use fermented wine for communion. Unlike in Roman Catholicism, the consecrated bread and wine are always offered to the congregation at a eucharistic service ("communion in both kinds"). This practice is becoming more frequent in the Roman Catholic Church as well, especially through the Neocatechumenal Way. In some churches, the sacrament is reserved in a tabernacle or aumbry with a lighted candle or lamp nearby. In Anglican churches, only a priest or a bishop may be the celebrant at the Eucharist. Divine office All Anglican prayer books contain offices for Morning Prayer (Matins) and Evening Prayer (Evensong). In the original Book of Common Prayer, these were derived from combinations of the ancient monastic offices of Matins and Lauds; and Vespers and Compline, respectively. The prayer offices have an important place in Anglican history. Prior to the Catholic revival of the 19th century, which eventually restored the Holy Eucharist as the principal Sunday liturgy, and especially during the 18th century, a morning service combining Matins, the Litany, and ante-Communion comprised the usual expression of common worship, while Matins and Evensong were sung daily in cathedrals and some collegiate chapels. This nurtured a tradition of distinctive Anglican chant applied to the canticles and psalms used at the offices (although plainsong is often used as well). In some official and many unofficial Anglican service books, these offices are supplemented by other offices such as the Little Hours of Prime and prayer during the day such as (Terce, Sext, None, and Compline). Some Anglican monastic communities have a Daily Office based on that of the Book of Common Prayer but with additional antiphons and canticles, etc., for specific days of the week, specific psalms, etc. See, for example, Order of the Holy Cross and Order of St Helena, editors, A Monastic Breviary (Wilton, Conn.: Morehouse-Barlow, 1976). The All Saints Sisters of the Poor, with convents in Catonsville, Maryland, and elsewhere, use an elaborated version of the Anglican Daily Office. The Society of St. Francis publishes Celebrating Common Prayer, which has become especially popular for use among Anglicans. In England, the United States, Canada, Australia, New Zealand, and some other Anglican provinces, the modern prayer books contain four offices: Morning Prayer, corresponding to Matins, Lauds and Prime; Prayer During the Day, roughly corresponding to the combination of Terce, Sext, and None (Noonday Prayer in the USA); Evening Prayer, corresponding to Vespers (and Compline); Compline. In addition, most prayer books include a section of prayers and devotions for family use. In the US, these offices are further supplemented by an "Order of Worship for the Evening", a prelude to or an abbreviated form of Evensong, partly derived from Orthodox prayers. In the United Kingdom, the publication of Daily Prayer, the third volume of Common Worship, was published in 2005. It retains the services for Morning and Evening Prayer and Compline and includes a section entitled "Prayer during the Day". A New Zealand Prayer Book of 1989 provides different outlines for Matins and Evensong on each day of the week, as well as "Midday Prayer", "Night Prayer" and "Family Prayer". Some Anglicans who pray the office on daily basis use the present Divine Office of the Roman Catholic Church. In many cities, especially in England, Anglican and Roman Catholic priests and lay people often meet several times a week to pray the office in common. A small but enthusiastic minority use the Anglican Breviary, or other translations and adaptations of the pre–Vatican II Roman Rite and Sarum Rite, along with supplemental material from cognate western sources, to provide such things as a common of Octaves, a common of Holy Women, and other additional material. Others may privately use idiosyncratic forms borrowed from a wide range of Christian traditions. "Quires and Places where they sing" In the late medieval period, many English cathedrals and monasteries had established small choirs of trained lay clerks and boy choristers to perform polyphonic settings of the Mass in their Lady chapels. Although these "Lady Masses" were discontinued at the Reformation, the associated musical tradition was maintained in the Elizabethan Settlement through the establishment of choral foundations for daily singing of the Divine Office by expanded choirs of men and boys. This resulted from an explicit addition by Elizabeth herself to the injunctions accompanying the 1559 Book of Common Prayer (that had itself made no mention of choral worship) by which existing choral foundations and choir schools were instructed to be continued, and their endowments secured. Consequently, some thirty-four cathedrals, collegiate churches, and royal chapels maintained paid establishments of lay singing men and choristers in the late 16th century. All save four of these have – with interruptions during the Commonwealth and the COVID-19 pandemic – continued daily choral prayer and praise to this day. In the Offices of Matins and Evensong in the 1662 Book of Common Prayer, these choral establishments are specified as "Quires and Places where they sing". For nearly three centuries, this round of daily professional choral worship represented a tradition entirely distinct from that embodied in the intoning of Parish Clerks, and the singing of "west gallery choirs" which commonly accompanied weekly worship in English parish churches. In 1841, the rebuilt Leeds Parish Church established a surpliced choir to accompany parish services, drawing explicitly on the musical traditions of the ancient choral foundations. Over the next century, the Leeds example proved immensely popular and influential for choirs in cathedrals, parish churches, and schools throughout the Anglican communion. More or less extensively adapted, this choral tradition also became the direct inspiration for robed choirs leading congregational worship in a wide range of Christian denominations. In 1719, the cathedral choirs of Gloucester, Hereford, and Worcester combined to establish the annual Three Choirs Festival, the precursor for the multitude of summer music festivals since. By the 20th century, the choral tradition had become for many the most accessible face of worldwide Anglicanism – especially as promoted through the regular broadcasting of choral evensong by the BBC; and also in the annual televising of the festival of Nine Lessons and Carols from King's College, Cambridge. Composers closely concerned with this tradition include Edward Elgar, Ralph Vaughan Williams, Gustav Holst, Charles Villiers Stanford, and Benjamin Britten. A number of important 20th-century works by non-Anglican composers were originally commissioned for the Anglican choral tradition – for example, the Chichester Psalms of Leonard Bernstein and the Nunc dimittis of Arvo Pärt. Communion Principles of governance Contrary to popular misconception, the British monarch is not the constitutional "head" of the Church of England but is, in law, the church's "supreme governor", nor does the monarch have any role in provinces outside England. The role of the crown in the Church of England is practically limited to the appointment of bishops, including the Archbishop of Canterbury, and even this role is limited, as the church presents the government with a short list of candidates from which to choose. This process is accomplished through collaboration with and consent of ecclesial representatives (see Ecclesiastical Commissioners). Although the monarch has no constitutional role in Anglican churches in other parts of the world, the prayer books of several countries where the monarch is head of state contain prayers for him or her as sovereign. A characteristic of Anglicanism is that it has no international juridical authority. All forty-two provinces of the Anglican Communion are autonomous, each with their own primate and governing structure. These provinces may take the form of national churches (such as in Canada, Uganda or Japan) or a collection of nations (such as the West Indies, Central Africa or South Asia), or geographical regions (such as Vanuatu and Solomon Islands) etc. Within these provinces there may exist subdivisions, called ecclesiastical provinces, under the jurisdiction of a metropolitan archbishop. All provinces of the Anglican Communion consist of dioceses, each under the jurisdiction of a bishop. In the Anglican tradition, bishops must be consecrated according to the strictures of apostolic succession, which Anglicans consider one of the marks of catholicity. Apart from bishops, there are two other orders of ordained ministry: deacon and priest. No requirement is made for clerical celibacy, though many Anglo-Catholic priests have traditionally been bachelors. Because of innovations that occurred at various points after the latter half of the 20th century, women may be ordained as deacons in almost all provinces, as priests in most and as bishops in many. Anglican religious orders and communities, suppressed in England during the Reformation, have re-emerged, especially since the mid-19th century, and now have an international presence and influence. Government in the Anglican Communion is synodical, consisting of three houses of laity (usually elected parish representatives), clergy and bishops. National, provincial and diocesan synods maintain different scopes of authority, depending on their canons and constitutions. Anglicanism is not congregational in its polity: it is the diocese, not the parish church, which is the smallest unit of authority in the church. (See Episcopal polity). Archbishop of Canterbury The Archbishop of Canterbury has a precedence of honour over the other primates of the Anglican Communion, and for a province to be considered a part of the communion means specifically to be in full communion with the see of Canterbury – though this principle is currently subject to considerable debate, especially among those in the so-called Global South, including American Anglicans. The archbishop is, therefore, recognised as primus inter pares ("first amongst equals"), even though he does not exercise any direct authority in any province outside England, of which he is chief primate. Rowan Williams, the Archbishop of Canterbury from 2002 to 2012, was the first archbishop appointed from outside the Church of England since the Reformation: he was formerly the Archbishop of Wales. As "spiritual head" of the communion, the Archbishop of Canterbury maintains a certain moral authority and has the right to determine which churches will be in communion with his see. He hosts and chairs the Lambeth Conferences of Anglican Communion bishops and decides who will be invited to them. He also hosts and chairs the Anglican Communion Primates' Meeting and is responsible for the invitations to it. He acts as president of the secretariat of the Anglican Communion Office and its deliberative body, the Anglican Consultative Council. Conferences The Anglican Communion has no international juridical organisation. All international bodies are consultative and collaborative, and their resolutions are not legally binding on the autonomous provinces of the communion. There are three international bodies of note. The Lambeth Conference is the oldest international consultation. It was first convened by Archbishop Charles Longley in 1867 as a vehicle for bishops of the communion to "discuss matters of practical interest, and pronounce what we deem expedient in resolutions which may serve as safe guides to future action". Since then, it has been held roughly every ten years. Invitation is by the Archbishop of Canterbury. The Anglican Consultative Council was created by a 1968 Lambeth Conference resolution and meets biennially. The council consists of representative bishops, clergy and laity chosen by the forty-two provinces. The body has a permanent secretariat, the Anglican Communion Office, of which the Archbishop of Canterbury is president. The Anglican Communion Primates' Meeting is the most recent manifestation of international consultation and deliberation, having been first convened by Archbishop Donald Coggan in 1978 as a forum for "leisurely thought, prayer and deep consultation". Ordained ministry Like the Roman Catholic Church and the Orthodox churches, the Anglican Communion maintains the threefold ministry of deacons, presbyters (usually called "priests"), and bishops. Episcopate Bishops, who possess the fullness of Christian priesthood, are the successors of the apostles. Primates, archbishops, and metropolitans are all bishops and members of the historical episcopate who derive their authority through apostolic succession – an unbroken line of bishops that can be traced back to the 12 apostles of Jesus. Priesthood Bishops are assisted by priests and deacons. Most ordained ministers in the Anglican Communion are priests, who usually work in parishes within a diocese. Priests are in charge of the spiritual life of parishes and are usually called the rector or vicar. A curate (or, more correctly, an "assistant curate") is a priest or deacon who assists the parish priest. Non-parochial priests may earn their living by any vocation, although employment by educational institutions or charitable organisations is most common. Priests also serve as chaplains of hospitals, schools, prisons, and in the armed forces. An archdeacon is a priest or deacon responsible for administration of an archdeaconry, which is often the name given to the principal subdivisions of a diocese. An archdeacon represents the diocesan bishop in his or her archdeaconry. In the Church of England, the position of archdeacon can only be held by someone in priestly orders who has been ordained for at least six years. In some other parts of the Anglican Communion, the position can also be held by deacons. In parts of the Anglican Communion where women cannot be ordained as priests or bishops but can be ordained as deacons, the position of archdeacon is effectively the most senior office to which an ordained woman can be appointed. A dean is a priest who is the principal cleric of a cathedral or other collegiate church and the head of the chapter of canons. If the cathedral or collegiate church has its own parish, the dean is usually also rector of the parish. However, in the Church of Ireland, the roles are often separated, and most cathedrals in the Church of England do not have associated parishes. In the Church in Wales, however, most cathedrals are parish churches and their deans are now also vicars of their parishes. The Anglican Communion recognises Roman Catholic and Eastern Orthodox ordinations as valid. Outside the Anglican Communion, Anglican ordinations (at least of male priests) are recognised by the Old Catholic Church, Porvoo Communion Lutherans, and various Independent Catholic churches. Diaconate In Anglican churches, deacons often work directly in ministry to the marginalised inside and outside the church: the poor, the sick, the hungry, the imprisoned. Unlike Orthodox and most Roman Catholic deacons who may be married only before ordination, deacons are permitted to marry freely both before and after ordination, as are priests. Most deacons are preparing for priesthood and usually only remain as deacons for about a year before being ordained priests. However, there are some deacons who remain so. Many provinces of the Anglican Communion ordain both men and women as deacons. Many of those provinces that ordain women to the priesthood previously allowed them to be ordained only to the diaconate. The effect of this was the creation of a large and overwhelmingly female diaconate for a time, as most men proceeded to be ordained priest after a short time as a deacon. Deacons, in some dioceses, can be granted licences to solemnise matrimony, usually under the instruction of their parish priest and bishop. They sometimes officiate at Benediction of the Blessed Sacrament in churches which have this service. Deacons are not permitted to preside at the Eucharist (but can lead worship with the distribution of already consecrated communion where this is permitted), absolve sins, or pronounce a blessing. It is the prohibition against deacons pronouncing blessings that leads some to believe that deacons cannot solemnise matrimony. Laity All baptised members of the church are called Christian faithful, truly equal in dignity and in the work to build the church. Some non-ordained people also have a formal public ministry, often on a full-time and long-term basis – such as lay readers (also known as readers), churchwardens, vergers, and sextons. Other lay positions include acolytes (male or female, often children), lay eucharistic ministers (also known as chalice bearers), and lay eucharistic visitors (who deliver consecrated bread and wine to "shut-ins" or members of the parish who are unable to leave home or hospital to attend the Eucharist). Lay people also serve on the parish altar guild (preparing the altar and caring for its candles, linens, flowers, etc.), in the choir and as cantors, as ushers and greeters, and on the church council (called the "vestry" in some countries), which is the governing body of a parish. Religious orders A small yet influential aspect of Anglicanism is its religious orders and communities. Shortly after the beginning of the Catholic Revival in the Church of England, there was a renewal of interest in re-establishing religious and monastic orders and communities. One of Henry VIII's earliest acts was their dissolution and seizure of their assets. In 1841, Marian Rebecca Hughes became the first woman to take the vows of religion in communion with the Province of Canterbury since the Reformation. In 1848, Priscilla Lydia Sellon became the superior of the Society of the Most Holy Trinity at Devonport, Plymouth, the first organised religious order. Sellon is called "the restorer, after three centuries, of the religious life in the Church of England". For the next one hundred years, religious orders for both men and women proliferated throughout the world, becoming a numerically small but disproportionately influential feature of global Anglicanism. Anglican religious life at one time boasted hundreds of orders and communities, and thousands of religious. An important aspect of Anglican religious life is that most communities of both men and women lived their lives consecrated to God under the vows of poverty, chastity, and obedience (or, in Benedictine communities, Stability, Conversion of Life, and Obedience) by practising a mixed life of reciting the full eight services of the Breviary in choir, along with a daily Eucharist, plus service to the poor. The mixed life, combining aspects of the contemplative orders and the active orders, remains to this day a hallmark of Anglican religious life. Another distinctive feature of Anglican religious life is the existence of some mixed-gender communities. Since the 1960s, there has been a sharp decline in the number of professed religious in most parts of the Anglican Communion, especially in North America, Europe, and Australia. Many once large and international communities have been reduced to a single convent or monastery with memberships of elderly men or women. In the last few decades of the 20th century, novices have for most communities been few and far between. Some orders and communities have already become extinct. There are, however, still thousands of Anglican religious working today in approximately 200 communities around the world, and religious life in many parts of the Communion – especially in developing nations – flourishes. The most significant growth has been in the Melanesian countries of the Solomon Islands, Vanuatu, and Papua New Guinea. The Melanesian Brotherhood, founded at Tabalia, Guadalcanal, in 1925 by Ini Kopuria, is now the largest Anglican Community in the world, with over 450 brothers in the Solomon Islands, Vanuatu, Papua New Guinea, the Philippines, and the United Kingdom. The Sisters of the Church, started by Mother Emily Ayckbowm in England in 1870, has more sisters in the Solomons than all their other communities. The Community of the Sisters of Melanesia, started in 1980 by Sister Nesta Tiboe, is a growing community of women throughout the Solomon Islands. The Society of Saint Francis, founded as a union of various Franciscan orders in the 1920s, has experienced great growth in the Solomon Islands. Other communities of religious have been started by Anglicans in Papua New Guinea and in Vanuatu. Most Melanesian Anglican religious are in their early to mid-20s – vows may be temporary and it is generally assumed that brothers, at least, will leave and marry in due course – making the average age 40 to 50 years younger than their brothers and sisters in other countries. Growth of religious orders, especially for women, is marked in certain parts of Africa. Worldwide distribution Anglicanism represents the third largest Christian communion in the world, after the Roman Catholic Church and the Eastern Orthodox Church. The number of Anglicans in the world is over 85 million . The 11 provinces in Africa saw growth in the last two decades. They now include 36.7 million members, more Anglicans than there are in England. England remains the largest single Anglican province, with 26 million members. In most industrialised countries, church attendance has decreased since the 19th century. Anglicanism's presence in the rest of the world is due to large-scale emigration, the establishment of expatriate communities, or the work of missionaries. The Church of England has been a church of missionaries since the 17th century, when the Church first left English shores with colonists who founded what would become the United States, Australia, Canada, New Zealand, and South Africa, and established Anglican churches. For example, an Anglican chaplain, Robert Wolfall, with Martin Frobisher's Arctic expedition, celebrated the Eucharist in 1578 in Frobisher Bay. The first Anglican church in the Americas was built at Jamestown, Virginia, in 1607. By the 18th century, missionaries worked to establish Anglican churches in Asia, Africa, and Latin America. The great Church of England missionary societies were founded; for example, the Society for Promoting Christian Knowledge (SPCK) in 1698, the Society for the Propagation of the Gospel in Foreign Parts (SPG) in 1701, and the Church Mission Society (CMS) in 1799. The 19th century saw the founding and expansion of social-oriented evangelism with societies such as the Church Pastoral Aid Society (CPAS) in 1836, Mission to Seafarers in 1856, Girls' Friendly Society (GFS) in 1875, Mothers' Union in 1876, and Church Army in 1882, all carrying out a personal form of evangelism. The 20th century saw the Church of England developing new forms of evangelism such as the Alpha course in 1990, which was developed and propagated from Holy Trinity Brompton Church in London. In the 21st century, there has been renewed effort to reach children and youth. Fresh expressions is a Church of England missionary initiative to youth begun in 2005, and has ministries at a skate park through the efforts of St George's Church, Benfleet, Essex – Diocese of Chelmsford – or youth groups with evocative names, like the C.L.A.W (Christ Little Angels – Whatever!) youth group at Coventry Cathedral. And for the unchurched who do not actually wish to visit a brick and mortar church, there are Internet ministries such as the Diocese of Oxford's online Anglican i-Church, which appeared on the web in 2005. Ecumenism Anglican interest in ecumenical dialogue can be traced back to the time of the Reformation and dialogues with both Orthodox and Lutheran churches in the 16th century. In the 19th century, with the rise of the Oxford Movement, there arose greater concern for reunion of the churches of "Catholic confession". This desire to work towards full communion with other denominations led to the development of the Chicago-Lambeth Quadrilateral, approved by the third Lambeth Conference of 1888. The four points (the sufficiency of scripture, the historic creeds, the two dominical sacraments, and the historic episcopate) were proposed as a basis for discussion, although they have frequently been taken as a non-negotiable bottom-line for any form of reunion. Theological diversity Anglicanism in general has always sought a balance between the emphases of Catholicism and Protestantism, while tolerating a range of expressions of evangelicalism and ceremony. Clergy and laity from all Anglican churchmanship traditions have been active in the formation of the Continuing movement. While there are high church, broad-church and low-church Continuing Anglicans, many Continuing churches are Anglo-Catholic with highly ceremonial liturgical practices. Others belong to a more evangelical or low-church tradition and tend to support the Thirty-nine Articles and simpler worship services. Morning Prayer, for instance, is often used instead of the Holy Eucharist for Sunday worship services, although this is not necessarily true of all low-church parishes. Most Continuing churches in the United States reject the 1979 revision of the Book of Common Prayer by the Episcopal Church and use the 1928 version for their services instead. In addition, Anglo-Catholic bodies may use the Anglican Missal, Anglican Service Book or English Missal when celebrating Mass. Internal conflict A changing focus on social issues after the Second World War led to Lambeth Conference resolutions countenancing contraception and the remarriage of divorced persons. Eventually, most provinces approved the ordination of women. In more recent years, some jurisdictions have permitted the ordination of people in same-sex relationships and authorised rites for the blessing of same-sex unions (see Homosexuality and Anglicanism). "The more liberal provinces that are open to changing Church doctrine on marriage in order to allow for same-sex unions include Brazil, Canada, New Zealand, Scotland, South India, South Africa, the US and Wales," while the more conservative provinces are primarily located in the Global South. The lack of social consensus among and within provinces of diverse cultural traditions has resulted in considerable conflict and even schism concerning some or all of these developments (see Anglican realignment). More conservative elements within and outside of Anglicanism (primarily African churches and factions within North American Anglicanism) have opposed these changes, while some liberal and moderate Anglicans see this opposition as representing a new fundamentalism within Anglicanism and "believe a split is inevitable and preferable to continued infighting and paralysis." Some Anglicans opposed to various liberalising changes, in particular the ordination of women, have become Roman Catholics or Orthodox. Others have, at various times, joined the Continuing Anglican movement. Continuum The term "Continuing Anglicanism" refers to a number of church bodies which have formed outside of the Anglican Communion in the belief that traditional forms of Anglican faith, worship, and order have been unacceptably revised or abandoned within some Anglican Communion churches in recent decades. They therefore claim that they are "continuing" traditional Anglicanism. The modern Continuing Anglican movement principally dates to the Congress of St. Louis, held in the United States in 1977, where participants rejected changes that had been made in the Episcopal Church's Book of Common Prayer and also the Episcopal Church's approval of the ordination of women to the priesthood. More recent changes in the North American churches of the Anglican Communion, such as the introduction of same-sex marriage rites and the ordination of gay and lesbian people to the priesthood and episcopate, have created further separations. Continuing churches have generally been formed by people who have left the Anglican Communion. The original Anglican churches are charged by the Continuing Anglicans with being greatly compromised by secular cultural standards and liberal theology. Many Continuing Anglicans believe that the faith of some churches in communion with the Archbishop of Canterbury has become unorthodox and therefore have not sought to also be in communion with him. The original continuing parishes in the United States were found mainly in metropolitan areas. Since the late 1990s, a number have appeared in smaller communities, often as a result of a division in the town's existing Episcopal churches. The 2007–08 Directory of Traditional Anglican and Episcopal Parishes, published by the Fellowship of Concerned Churchmen, contained information on over 900 parishes affiliated with either the Continuing Anglican churches or the Anglican realignment movement, a more recent wave of Anglicans withdrawing from the Anglican Communion's North American provinces. Social activism A concern for social justice can be traced to very early Anglican beliefs, relating to an intertwined theology of God, nature, and humanity. The Anglican theologian Richard Hooker wrote in his book The Works of that Learned and Judicious Divine that "God hath created nothing simply for itself, but each thing in all things, and of every thing each part in other have such interest, that in the whole world nothing is found whereunto any thing created can say, 'I need thee not.'" Such statements demonstrate a theological Anglican interest in social activism, which has historically appeared in movements such as evangelical Anglican William Wilberforce's campaign against slavery in the 18th century, or 19th century issues concerning industrialisation. Working conditions and Christian socialism Lord Shaftesbury, a devout evangelical, campaigned to improve the conditions in factories, in mines, for chimney sweeps, and for the education of the very poor. For years, he was chairman of the Ragged School Board. Frederick Denison Maurice was a leading figure advocating reform, founding so-called "producer's co-operatives" and the Working Men's College. His work was instrumental in the establishment of the Christian socialist movement, although he himself was not in any real sense a socialist but "a Tory paternalist with the unusual desire to theories his acceptance of the traditional obligation to help the poor", influenced Anglo-Catholics such as Charles Gore, who wrote that "the principle of the incarnation is denied unless the Christian spirit can be allowed to concern itself with everything that interests and touches human life." Anglican focus on labour issues culminated in the work of William Temple in the 1930s and 1940s." Pacifism A question of whether or not Christianity is a pacifist religion has remained a matter of debate for Anglicans. The leading Anglican spokesman for pacifist ideas, from 1914 to 1945, was Ernest Barnes, bishop of Birmingham from 1924 to 1953. He opposed both world wars. In 1937, the Anglican Pacifist Fellowship emerged as a distinct reform organisation, seeking to make pacifism a clearly defined part of Anglican theology. The group rapidly gained popularity amongst Anglican intellectuals, including Vera Brittain, Evelyn Underhill, and the former British political leader George Lansbury. Furthermore, Dick Sheppard, who during the 1930s was one of Britain's most famous Anglican priests due to his landmark sermon broadcasts for BBC Radio, founded the Peace Pledge Union, a secular pacifist organisation for the non-religious that gained considerable support throughout the 1930s. Whilst never actively endorsed by Anglican churches, many Anglicans unofficially have adopted the Augustinian "Just War" doctrine. The Anglican Pacifist Fellowship remains highly active throughout the Anglican world. It rejects this doctrine of "just war" and seeks to reform the Church by reintroducing the pacifism inherent in the beliefs of many of the earliest Christians and present in their interpretation of Christ's Sermon on the Mount. The principles of the Anglican Pacifist Fellowship are often formulated as a statement of belief that "Jesus' teaching is incompatible with the waging of war ... that a Christian church should never support or justify war ... [and] that our Christian witness should include opposing the waging or justifying of war." Confusing the matter was the fact that the 37th Article of Religion in the Book of Common Prayer states that "it is lawful for Christian men, at the commandment of the Magistrate, to wear weapons, and serve in the wars." Therefore, the Lambeth Council in the modern era has sought to provide a clearer position by repudiating modern war and developed a statement that has been affirmed at each subsequent meeting of the council. This statement was strongly reasserted when "the 67th General Convention of the Episcopal Church reaffirms the statement made by the Anglican Bishops assembled at Lambeth in 1978 and adopted by the 66th General Convention of the Episcopal Church in 1979, calling "Christian people everywhere ... to engage themselves in non-violent action for justice and peace and to support others so engaged, recognising that such action will be controversial and may be personally very costly... this General Convention, in obedience to this call, urges all members of this Church to support by prayer and by such other means as they deem appropriate, those who engaged in such non-violent action, and particularly those who suffer for conscience' sake as a result; and be it further Resolved, that this General Convention calls upon all members of this Church seriously to consider the implications for their own lives of this call to resist war and work for peace for their own lives." After World War II The focus on other social issues became increasingly diffuse after the Second World War. On the one hand, the growing independence and strength of Anglican churches in the Global South brought new emphasis to issues of global poverty, the inequitable distribution of resources, and the lingering effects of colonialism. In this regard, figures such as Desmond Tutu and Ted Scott were instrumental in mobilising Anglicans worldwide against the apartheid policies of South Africa. Rapid social change in the industrialised world during the 20th century compelled the church to examine issues of gender, sexuality, and marriage. Ordinariates within the Roman Catholic Church On 4 November 2009, Pope Benedict XVI issued an apostolic constitution, Anglicanorum Coetibus, to allow groups of former Anglicans to enter into full communion with the Roman Catholic Church as members of personal ordinariates. 20 October 2009 announcement of the imminent constitution mentioned: Pope Benedict XVI approved, within the apostolic constitution, a canonical structure that provides for personal ordinariates which will allow former Anglicans to enter full communion with the Roman Catholic Church while preserving elements of distinctive Anglican spiritual patrimony. For each personal ordinariate, the ordinary may be a former Anglican bishop or priest. It was expected that provision would be made to allow the retention of aspects of Anglican liturgy. Notes References Citations Sources Further reading Buchanan, Colin. Historical Dictionary of Anglicanism (2nd ed. 2015) excerpt External links Anglican Communion website What it means to be an Anglican article Anglican History website Anglicans Online website Online Anglican resources Protestant denominations established in the 16th century Christian denominations founded in Great Britain

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

Athens

Athens ( ; ; (pl.) ) is a major coastal city in the Mediterranean and is both the capital and largest city of Greece. With a population close to four million, it is also the seventh largest city in the European Union. Athens dominates and is the capital of the Attica region and is one of the world's oldest cities, with its recorded history spanning over 3,400 years and its earliest human presence beginning somewhere between the 11th and 7th millennia BC. Classical Athens was a powerful city-state. It was a centre for the arts, learning and philosophy, and the home of Plato's Academy and Aristotle's Lyceum. It is widely referred to as the cradle of Western civilization and the birthplace of democracy, largely because of its cultural and political influence on the European continent—particularly Ancient Rome. In modern times, Athens is a large cosmopolitan metropolis and central to economic, financial, industrial, maritime, political and cultural life in Greece. In 2021, Athens' urban area hosted more than three and a half million people, which is around 35% of the entire population of Greece. Athens is a Beta-status global city according to the Globalization and World Cities Research Network, and is one of the biggest economic centers in Southeastern Europe. It also has a large financial sector, and its port Piraeus is both the largest passenger port in Europe, and the third largest in the world. The Municipality of Athens (also City of Athens), which actually constitutes a small administrative unit of the entire city, had a population of 637,798 (in 2021) within its official limits, and a land area of . The Athens Metropolitan Area or Greater Athens extends beyond its administrative municipal city limits, with a population of 3,722,544 (in 2021) over an area of . Athens is also the southernmost capital on the European mainland and the warmest major city in continental Europe with an average annual temperature of up to locally. The heritage of the Classical Era is still evident in the city, represented by ancient monuments, and works of art, the most famous of all being the Parthenon, considered a key landmark of early Western civilization. The city also retains Roman, Byzantine and a smaller number of Ottoman monuments, while its historical urban core features elements of continuity through its millennia of history. Athens is home to two UNESCO World Heritage Sites, the Acropolis of Athens and the medieval Daphni Monastery. Landmarks of the modern era, dating back to the establishment of Athens as the capital of the independent Greek state in 1834, include the Hellenic Parliament and the so-called "Architectural Trilogy of Athens", consisting of the National Library of Greece, the National and Kapodistrian University of Athens, and the Academy of Athens. Athens is also home to several museums and cultural institutions, such as the National Archeological Museum, featuring the world's largest collection of ancient Greek antiquities, the Acropolis Museum, the Museum of Cycladic Art, the Benaki Museum, and the Byzantine and Christian Museum. Athens was the host city of the first modern-day Olympic Games in 1896, and 108 years later it hosted the 2004 Summer Olympics, making it one of the few cities to have hosted the Olympics more than once. Athens joined the UNESCO Global Network of Learning Cities in 2016. Etymology and names In Ancient Greek, the name of the city was (Athênai, in Classical Attic) a plural. In earlier Greek, such as Homeric Greek, the name had been current in the singular form though, as (Athḗnē). It was possibly rendered in the plural later on, like those of (Thêbai) and (Μukênai). The root of the word is probably not of Greek or Indo-European origin, and is possibly a remnant of the Pre-Greek substrate of Attica. In antiquity, it was debated whether Athens took its name from its patron goddess Athena (Attic , Athēnâ, Ionic , Athḗnē, and Doric , Athā́nā) or Athena took her name from the city. Modern scholars now generally agree that the goddess takes her name from the city, because the ending -ene is common in names of locations, but rare for personal names. According to the ancient Athenian founding myth, Athena, the goddess of wisdom and war, competed against Poseidon, the God of the Seas, for patronage of the yet-unnamed city; they agreed that whoever gave the Athenians the better gift would become their patron and appointed Cecrops, the king of Athens, as the judge. According to the account given by Pseudo-Apollodorus, Poseidon struck the ground with his trident and a salt water spring welled up. In an alternative version of the myth from Vergil's poem Georgics, Poseidon instead gave the Athenians the first horse. In both versions, Athena offered the Athenians the first domesticated olive tree. Cecrops accepted this gift and declared Athena the patron goddess of Athens. Eight different etymologies, now commonly rejected, have been proposed since the 17th century. Christian Lobeck proposed as the root of the name the word (áthos) or (ánthos) meaning "flower", to denote Athens as the "flowering city". Ludwig von Döderlein proposed the stem of the verb , stem θη- (tháō, thē-, "to suck") to denote Athens as having fertile soil. Athenians were called cicada-wearers () because they used to wear pins of golden cicadas. A symbol of being autochthonous (earth-born), because the legendary founder of Athens, Erechtheus was an autochthon or of being musicians, because the cicada is a "musician" insect. In classical literature, the city was sometimes referred to as the City of the Violet Crown, first documented in Pindar's ἰοστέφανοι Ἀθᾶναι (iostéphanoi Athânai), or as (tò kleinòn ásty, "the glorious city"). During the medieval period, the name of the city was rendered once again in the singular as . Variant names included Setines, Satine, and Astines, all derivations involving false splitting of prepositional phrases. King Alphonse X of Castile gives the pseudo-etymology 'the one without death/ignorance'. In Ottoman Turkish, it was called Ātīnā, and in modern Turkish, it is Atina. After the establishment of the modern Greek state, and partly due to the conservatism of the written language, again became the official name of the city and remained so until the abandonment of Katharevousa in the 1970s, when Ἀθήνα, Athína, became the official name. Today, it is often simply called ī protévousa; 'the capital'. History The oldest known human presence in Athens is the Cave of Schist, which has been dated to between the 11th and 7th millennia BC. Athens has been continuously inhabited for at least 5,000 years (3000 BC). By 1400 BC, the settlement had become an important centre of the Mycenaean civilization, and the Acropolis was the site of a major Mycenaean fortress, whose remains can be recognised from sections of the characteristic Cyclopean walls. Unlike other Mycenaean centers, such as Mycenae and Pylos, it is not known whether Athens suffered destruction in about 1200 BC, an event often attributed to a Dorian invasion, and the Athenians always maintained that they were pure Ionians with no Dorian element. However, Athens, like many other Bronze Age settlements, went into economic decline for around 150 years afterwards. Iron Age burials, in the Kerameikos and other locations, are often richly provided for and demonstrate that from 900 BC onwards Athens was one of the leading centres of trade and prosperity in the region. The leading position of Athens may well have resulted from its central location in the Greek world, its secure stronghold on the Acropolis and its access to the sea, which gave it a natural advantage over inland rivals such as Thebes and Sparta. By the sixth century BC, widespread social unrest led to the reforms of Solon. These would pave the way for the eventual introduction of democracy by Cleisthenes in 508 BC. Athens had by this time become a significant naval power with a large fleet, and helped the rebellion of the Ionian cities against Persian rule. In the ensuing Greco-Persian Wars Athens, together with Sparta, led the coalition of Greek states that would eventually repel the Persians, defeating them decisively at Marathon in 490 BC, and crucially at Salamis in 480 BC. However, this did not prevent Athens from being captured and sacked twice by the Persians within one year, after a heroic but ultimately failed resistance at Thermopylae by Spartans and other Greeks led by King Leonidas, after both Boeotia and Attica fell to the Persians. The decades that followed became known as the Golden Age of Athenian democracy, during which time Athens became the leading city of Ancient Greece, with its cultural achievements laying the foundations for Western civilization. The playwrights Aeschylus, Sophocles and Euripides flourished in Athens during this time, as did the historians Herodotus and Thucydides, the physician Hippocrates, and the philosopher Socrates. Guided by Pericles, who promoted the arts and fostered democracy, Athens embarked on an ambitious building program that saw the construction of the Acropolis of Athens (including the Parthenon), as well as empire-building via the Delian League. Originally intended as an association of Greek city-states to continue the fight against the Persians, the league soon turned into a vehicle for Athens's own imperial ambitions. The resulting tensions brought about the Peloponnesian War (431–404 BC), in which Athens was defeated by its rival Sparta. By the mid-4th century BC, the northern Greek kingdom of Macedon was becoming dominant in Athenian affairs. In 338 BC the armies of Philip II defeated an alliance of some of the Greek city-states including Athens and Thebes at the Battle of Chaeronea, effectively ending Athenian independence. Later, under Rome, Athens was given the status of a free city because of its widely admired schools. In the second century AD, The Roman emperor Hadrian, himself an Athenian citizen, ordered the construction of a library, a gymnasium, an aqueduct which is still in use, several temples and sanctuaries, a bridge and financed the completion of the Temple of Olympian Zeus. By the end of Late Antiquity, Athens had shrunk due to sacks by the Herulians, Visigoths, and Early Slavs which caused massive destruction in the city. In this era, the first Christian churches were built in Athens, and the Parthenon and other temples were converted into churches. Athens expanded its settlement in the second half of the Middle Byzantine Period, in the ninth to tenth centuries AD, and was relatively prosperous during the Crusades, benefiting from Italian trade. After the Fourth Crusade the Duchy of Athens was established. In 1458, it was conquered by the Ottoman Empire and entered a long period of decline. Following the Greek War of Independence and the establishment of the Greek Kingdom, Athens was chosen as the capital of the newly independent Greek state in 1834, largely because of historical and sentimental reasons. At the time, after the extensive destruction it had suffered during the war of independence, it was reduced to a town of about 4,000 people (less than half its earlier population) in a loose swarm of houses along the foot of the Acropolis. The first King of Greece, Otto of Bavaria, commissioned the architects Stamatios Kleanthis and Eduard Schaubert to design a modern city plan fit for the capital of a state. The first modern city plan consisted of a triangle defined by the Acropolis, the ancient cemetery of Kerameikos and the new palace of the Bavarian king (now housing the Greek Parliament), so as to highlight the continuity between modern and ancient Athens. Neoclassicism, the international style of this epoch, was the architectural style through which Bavarian, French and Greek architects such as Hansen, Klenze, Boulanger or Kaftantzoglou designed the first important public buildings of the new capital. In 1896, Athens hosted the first modern Olympic Games. During the 1920s a number of Greek refugees, expelled from Asia Minor after the Greco-Turkish War and Greek genocide, swelled Athens's population; nevertheless it was most particularly following World War II, and from the 1950s and 1960s, that the population of the city exploded, and Athens experienced a gradual expansion. In the 1980s, it became evident that smog from factories and an ever-increasing fleet of automobiles, as well as a lack of adequate free space due to congestion, had evolved into the city's most important challenge. A series of anti-pollution measures taken by the city's authorities in the 1990s, combined with a substantial improvement of the city's infrastructure (including the Attiki Odos motorway, the expansion of the Athens Metro, and the new Athens International Airport), considerably alleviated pollution and transformed Athens into a much more functional city. In 2004, Athens hosted the 2004 Summer Olympics. Geography Athens sprawls across the central plain of Attica that is often referred to as the Athens Basin or the Attica Basin (). The basin is bounded by four large mountains: Mount Aigaleo to the west, Mount Parnitha to the north, Mount Pentelicus to the northeast and Mount Hymettus to the east. Beyond Mount Aegaleo lies the Thriasian plain, which forms an extension of the central plain to the west. The Saronic Gulf lies to the southwest. Mount Parnitha is the tallest of the four mountains (), and has been declared a national park. The Athens urban area spreads over from Agios Stefanos in the north to Varkiza in the south. The city is located in the north temperate zone, 38 degrees north of the equator. Athens is built around a number of hills. Lycabettus is one of the tallest hills of the city proper and provides a view of the entire Attica Basin. The meteorology of Athens is deemed to be one of the most complex in the world because its mountains cause a temperature inversion phenomenon which, along with the Greek government's difficulties controlling industrial pollution, was responsible for the air pollution problems the city has faced. This issue is not unique to Athens; for instance, Los Angeles and Mexico City also suffer from similar atmospheric inversion problems. The Cephissus river, the Ilisos and the Eridanos stream are the historical rivers of Athens. Environment By the late 1970s, the pollution of Athens had become so destructive that according to the then Greek Minister of Culture, Constantine Trypanis, "...the carved details on the five the caryatids of the Erechtheum had seriously degenerated, while the face of the horseman on the Parthenon's west side was all but obliterated." A series of measures taken by the authorities of the city throughout the 1990s resulted in the improvement of air quality; the appearance of smog (or nefos as the Athenians used to call it) has become less common. Measures taken by the Greek authorities throughout the 1990s have improved the quality of air over the Attica Basin. Nevertheless, air pollution still remains an issue for Athens, particularly during the hottest summer days. In late June 2007, the Attica region experienced a number of brush fires, including a blaze that burned a significant portion of a large forested national park in Mount Parnitha, considered critical to maintaining a better air quality in Athens all year round. Damage to the park has led to worries over a stalling in the improvement of air quality in the city. The major waste management efforts undertaken in the last decade (particularly the plant built on the small island of Psytalia) have greatly improved water quality in the Saronic Gulf, and the coastal waters of Athens are now accessible again to swimmers. Safety Athens ranks in the lowest percentage for the risk on frequency and severity of terrorist attacks according to the EU Global Terrorism Database (EIU 2007–2016 calculations). The city also ranked 35th in Digital Security, 21st on Health Security, 29th on Infrastructure Security and 41st on Personal Security globally in a 2017 The Economist Intelligence Unit report. It also ranks as a very safe city (39th globally out of 162 cities overall) on the ranking of the safest and most dangerous countries. As May 2022 the crime index from Numbeo places Athens at 56.33 (moderate), while its safety index is at 43.68. According to a Mercer 2019 Quality of Living Survey, Athens ranks 89th on the Mercer Quality of Living Survey ranking. Climate Athens has a hot-summer Mediterranean climate (Köppen climate classification: Csa). Athens is the hottest city in mainland Europe and according to the Hellenic National Meteorological Service the Athens Basin is also the warmest area of Greece with an average annual temperature of . The dominant feature of Athens' climate is alternation between prolonged hot and dry summers and mild, wetter winters with moderate rainfall. With an average of of yearly precipitation, rainfall occurs largely between the months of October and April. July and August are the driest months when thunderstorms occur sparsely. Furthermore, some coastal areas such as Piraeus in the Athens Riviera, have a hot semi-arid climate (BSh) according to the climate atlas published by the Hellenic National Meteorological Service. However, places like Elliniko, which are classified as hot semi-arid (BSh) because of the low annual rainfall, have not recorded temperatures as high as other places in the city. This occurs due to the moderating influence of the sea, and lower levels of industrialisation compared to other regions of the city. Owing to the rain shadow of the Pindus Mountains, annual precipitation of Athens is lower than most other parts of Greece, especially western Greece. As an example, Ioannina receives around per year, and Agrinio around per year. Daily average highs for July have been measured around in downtown Athens, but some parts of the city may be even hotter for the higher density of buildings, and the lower density of vegetation, such as the center, in particular, western areas due to a combination of industrialization and a number of natural factors, knowledge of which has existed since the mid-19th century. Due to the large area covered by Athens Metropolitan Area, there are notable climatic differences between parts of the urban conglomeration. The northern suburbs tend to be wetter and cooler in winter, whereas the southern suburbs are some of the driest locations in Greece and record very high minimum temperatures in summer. Heavy snow fell in the Greater Athens area and Athens itself between 14–17 February 2021, when snow blanketed the entire city and its suburbs from the north to the furthest south, coastal suburbs, with depth ranges up to in Central Athens., and with even the Acropolis of Athens completely covered with snow. The National Meteorological Service (EMY) described it was one of the most intense snow storms over the past 40 years. Heavy snow was also reported in Athens on January 24, 2022, with reported locally in the higher elevations. Athens is affected by the urban heat island effect in some areas which is caused by human activity, altering its temperatures compared to the surrounding rural areas, and leaving detrimental effects on energy usage, expenditure for cooling, and health. The urban heat island of the city has also been found to be partially responsible for alterations of the climatological temperature time-series of specific Athens meteorological stations, because of its effect on the temperatures and the temperature trends recorded by some meteorological stations. On the other hand, specific meteorological stations, such as the National Garden station and Thiseio meteorological station, are less affected or do not experience the urban heat island. Athens holds the official World Meteorological Organization record for the highest temperature ever recorded in Europe, at , which was recorded in the Elefsina and Tatoi suburbs of Athens on 10 July 1977. Furthermore, Metropolitan Athens has experienced temperatures of 47.5°C and over in four different locations. Locations Neighbourhoods of the center of Athens (Municipality of Athens) The Municipality of Athens, the City Centre of the Athens Urban Area, is divided into several districts: Omonoia, Syntagma, Exarcheia, Agios Nikolaos, Neapolis, Lykavittos, Lofos Strefi, Lofos Finopoulou, Lofos Filopappou, Pedion Areos, Metaxourgeio, Aghios Kostantinos, Larissa Station, Kerameikos, Psiri, Monastiraki, Gazi, Thission, Kapnikarea, Aghia Irini, Aerides, Anafiotika, Plaka, Acropolis, Pnyka, Makrygianni, Lofos Ardittou, Zappeion, Aghios Spyridon, Pangrati, Kolonaki, Dexameni, Evaggelismos, Gouva, Aghios Ioannis, Neos Kosmos, Koukaki, Kynosargous, Fix, Ano Petralona, Kato Petralona, Rouf, Votanikos, Profitis Daniil, Akadimia Platonos, Kolonos, Kolokynthou, Attikis Square, Lofos Skouze, Sepolia, Kypseli, Aghios Meletios, Nea Kypseli, Gyzi, Polygono, Ampelokipoi, Panormou-Gerokomeio, Pentagono, Ellinorosson, Nea Filothei, Ano Kypseli, Tourkovounia-Lofos Patatsou, Lofos Elikonos, Koliatsou, Thymarakia, Kato Patisia, Treis Gefyres, Aghios Eleftherios, Ano Patisia, Kypriadou, Menidi, Prompona, Aghios Panteleimonas, Pangrati, Goudi, Vyronas and Ilisia. Omonoia, Omonoia Square, () is the oldest square in Athens. It is surrounded by hotels and fast food outlets, and contains a metro station, named Omonia station. The square is the focus for celebration of sporting victories, as seen after the country's winning of the Euro 2004 and the EuroBasket 2005 tournaments. Metaxourgeio () is a neighborhood of Athens. The neighborhood is located north of the historical centre of Athens, between Kolonos to the east and Kerameikos to the west, and north of Gazi. Metaxourgeio is frequently described as a transition neighborhood. After a long period of abandonment in the late 20th century, the area is acquiring a reputation as an artistic and fashionable neighborhood following the opening of art galleries, museums, restaurants and cafés. [1] Local efforts to beautify and invigorate the neighborhood have reinforced a sense of community and artistic expression. Anonymous art pieces containing quotes and statements in both English and Ancient Greek have sprung up throughout the neighborhood, bearing statements such as "Art for art's sake" (Τέχνη τέχνης χάριν). Guerrilla gardening has also helped to beautify the area. Psiri – The reviving Psiri () neighbourhood – also known as Athens's "meat packing district" – is dotted with renovated former mansions, artists' spaces, and small gallery areas. A number of its renovated buildings also host fashionable bars, making it a hotspot for the city in the last decade, while live music restaurants known as "rebetadika", after rebetiko, a unique form of music that blossomed in Syros and Athens from the 1920s until the 1960s, are to be found. Rebetiko is admired by many, and as a result rebetadika are often crammed with people of all ages who will sing, dance and drink till dawn. The Gazi () area, one of the latest in full redevelopment, is located around a historic gas factory, now converted into the Technopolis cultural multiplex, and also includes artists' areas, active nightlife and night clubs, small clubs, cafeterias, bars and restaurants, as well as Athens's "Gay village". The metro's expansion to the western suburbs of the city has brought easier access to the area since spring 2007, as the line 3 now stops at Gazi (Kerameikos station). Syntagma, Syntagma Square, (/Constitution Square), is the capital's central and largest square, lying adjacent to the Greek Parliament (the former Royal Palace) and the city's most notable hotels. Ermou Street, an approximately pedestrian road connecting Syntagma Square to Monastiraki, is a consumer paradise for both Athenians and tourists. Complete with fashion shops and shopping centres promoting most international brands, it now finds itself in the top five most expensive shopping streets in Europe, and the tenth most expensive retail street in the world. Nearby, the renovated Army Fund building in Panepistimiou Street includes the "Attica" department store and several upmarket designer stores. Plaka, Monastiraki, and Thission – Plaka (), lying just beneath the Acropolis, is famous for its plentiful neoclassical architecture, making up one of the most scenic districts of the city. It remains a prime tourist destination with tavernas, live performances and street salesmen. Nearby Monastiraki (), for its part, is known for its string of small shops and markets, as well as its crowded flea market and tavernas specialising in souvlaki. Another district known for its student-crammed, stylish cafés is Theseum or Thission (), lying just west of Monastiraki. Thission is home to the ancient Temple of Hephaestus, standing atop a small hill. This area also has a picturesque 11th-century Byzantine church, as well as a 15th-century Ottoman mosque. Exarcheia (), located north of Kolonaki, often regarded as the city's anarchist scene and as a student quarter with night clubs, cafés, bars and bookshops. Exarcheia is home to the Athens Polytechnic and the National Archaeological Museum; it also contains important buildings of several 20th-century styles: Neoclassicism, Art Deco and Early Modernism (including Bauhaus influences). Kolonaki () is the area at the base of Lycabettus hill, full of boutiques catering to well-heeled customers by day, and bars and more fashionable restaurants by night, with galleries and museums. This is often regarded as one of the more prestigious areas of the capital. Parks and zoos Parnitha National Park is punctuated by well-marked paths, gorges, springs, torrents and caves dotting the protected area. Hiking and mountain-biking in all four mountains are popular outdoor activities for residents of the city. The National Garden of Athens was completed in 1840 and is a green refuge of 15.5 hectares in the centre of the Greek capital. It is to be found between the Parliament and Zappeion buildings, the latter of which maintains its own garden of seven hectares. Parts of the City Centre have been redeveloped under a masterplan called the Unification of Archeological Sites of Athens, which has also gathered funding from the EU to help enhance the project. The landmark Dionysiou Areopagitou Street has been pedestrianised, forming a scenic route. The route starts from the Temple of Olympian Zeus at Vasilissis Olgas Avenue, continues under the southern slopes of the Acropolis near Plaka, and finishes just beyond the Temple of Hephaestus in Thiseio. The route in its entirety provides visitors with views of the Parthenon and the Agora (the meeting point of ancient Athenians), away from the busy City Centre. The hills of Athens also provide green space. Lycabettus, Philopappos hill and the area around it, including Pnyx and Ardettos hill, are planted with pines and other trees, with the character of a small forest rather than typical metropolitan parkland. Also to be found is the Pedion tou Areos (Field of Mars) of 27.7 hectares, near the National Archaeological Museum. Athens' largest zoo is the Attica Zoological Park, a 20-hectare (49-acre) private zoo located in the suburb of Spata. The zoo is home to around 2000 animals representing 400 species, and is open 365 days a year. Smaller zoos exist within public gardens or parks, such as the zoo within the National Garden of Athens. Urban and suburban municipalities The Athens Metropolitan Area consists of 58 densely populated municipalities, sprawling around the Municipality of Athens (the City Centre) in virtually all directions. For the Athenians, all the urban municipalities surrounding the City Centre are called suburbs. According to their geographic location in relation to the City of Athens, the suburbs are divided into four zones; the northern suburbs (including Agios Stefanos, Dionysos, Ekali, Nea Erythraia, Kifissia, Kryoneri, Maroussi, Pefki, Lykovrysi, Metamorfosi, Nea Ionia, Nea Filadelfeia, Irakleio, Vrilissia, Melissia, Penteli, Chalandri, Agia Paraskevi, Gerakas, Pallini, Galatsi, Psychiko and Filothei); the southern suburbs (including Alimos, Nea Smyrni, Moschato, Tavros, Agios Ioannis Rentis, Kallithea, Piraeus, Agios Dimitrios, Palaio Faliro, Elliniko, Glyfada, Lagonisi, Saronida, Argyroupoli, Ilioupoli, Varkiza, Voula, Vari and Vouliagmeni); the eastern suburbs (including Zografou, Dafni, Vyronas, Kaisariani, Cholargos and Papagou); and the western suburbs (including Peristeri, Ilion, Egaleo, Koridallos, Agia Varvara, Keratsini, Perama, Nikaia, Drapetsona, Chaidari, Petroupoli, Agioi Anargyroi, Ano Liosia, Aspropyrgos, Eleusina, Acharnes and Kamatero). The Athens city coastline, extending from the major commercial port of Piraeus to the southernmost suburb of Varkiza for some , is also connected to the City Centre by tram. In the northern suburb of Maroussi, the upgraded main Olympic Complex (known by its Greek acronym OAKA) dominates the skyline. The area has been redeveloped according to a design by the Spanish architect Santiago Calatrava, with steel arches, landscaped gardens, fountains, futuristic glass, and a landmark new blue glass roof which was added to the main stadium. A second Olympic complex, next to the sea at the beach of Palaio Faliro, also features modern stadia, shops and an elevated esplanade. Work is underway to transform the grounds of the old Athens Airport – named Elliniko – in the southern suburbs, into one of the largest landscaped parks in Europe, to be named the Hellenikon Metropolitan Park. Many of the southern suburbs (such as Alimos, Palaio Faliro, Elliniko, Glyfada, Voula, Vouliagmeni and Varkiza) known as the Athens Riviera, host a number of sandy beaches, most of which are operated by the Greek National Tourism Organisation and require an entrance fee. Casinos operate on both Mount Parnitha, some from downtown Athens (accessible by car or cable car), and the nearby town of Loutraki (accessible by car via the Athens – Corinth National Highway, or the Athens Suburban Railway). Administration The large City Centre () of the Greek capital falls directly within the Municipality of Athens or Athens Municipality ()—also City of Athens. Athens Municipality is the largest in population size in Greece. Piraeus also forms a significant city centre on its own, within the Athens Urban Area and it is the second largest in population size within it. Athens Urban Area The Athens Urban Area (), also known as Urban Area of the Capital () or Greater Athens (), today consists of 40 municipalities, 35 of which make up what was referred to as the former Athens Prefecture municipalities, located within 4 regional units (North Athens, West Athens, Central Athens, South Athens); and a further 5 municipalities, which make up the former Piraeus Prefecture municipalities, located within the regional unit of Piraeus as mentioned above. The Athens Municipality forms the core and center of Greater Athens, which in its turn consists of the Athens Municipality and 40 more municipalities, divided in four regional units (Central, North, South and West Athens), accounting for 2,597,935 people (in 2021) within an area of . Until 2010, which made up the abolished Athens Prefecture and the municipality of Piraeus, the historic Athenian port, with 4 other municipalities make up the regional unit of Piraeus. The regional units of Central Athens, North Athens, South Athens, West Athens and Piraeus with part of East and West Attica regional units combined make up the continuous Athens Urban Area, also called the "Urban Area of the Capital" or simply "Athens" (the most common use of the term), spanning over , with a population of 3,041,131 people as of 2021. The Athens Urban Area is considered to form the city of Athens as a whole, despite its administrative divisions, which is the largest in Greece and one of the most populated urban areas in Europe. Athens metropolitan area The Athens metropolitan area spans within the Attica region and includes a total of 58 municipalities, which are organized in seven regional units (those outlined above, along with East Attica and West Attica), having reached a population of 3,722,544 according to the 2021 census. Athens and Piraeus municipalities serve as the two metropolitan centres of the Athens Metropolitan Area. There are also some inter-municipal centres serving specific areas. For example, Kifissia and Glyfada serve as inter-municipal centres for northern and southern suburbs respectively. Demographics Population in modern times The Municipality of Athens has an official population of 637,798 people (in 2021). The four regional units that make up what is referred to as Greater Athens have a combined population of 2,597,935. They together with the regional unit of Piraeus (Greater Piraeus) make up the dense Athens Urban Area which reaches a total population of 3,041,131 inhabitants (in 2021). According to Eurostat, in 2013 the functional urban area of Athens had 3,828,434 inhabitants, being apparently decreasing compared with the pre-economic crisis date of 2009 (4,164,175). The municipality (Center) of Athens is the most populous in Greece, with a population of 637,798 people (in 2021) and an area of , forming the core of the Athens Urban Area within the Attica Basin. The incumbent Mayor of Athens is Kostas Bakoyannis of New Democracy. The municipality is divided into seven municipal districts which are mainly used for administrative purposes. As of the 2011 census, the population for each of the seven municipal districts of Athens is as follows: 1st: 75,810 2nd: 103,004 3rd: 46,508 4th: 85,629 5th: 98,665 6th: 130,582 7th: 123,848 For the Athenians the most popular way of dividing the downtown is through its neighbourhoods such as Pagkrati, Ambelokipi, Goudi, Exarcheia, Patissia, Ilissia, Petralona, Plaka, Anafiotika, Koukaki, Kolonaki and Kypseli, each with its own distinct history and characteristics. Population of the Athens Metropolitan Area The Athens Metropolitan Area, with an area of and inhabited by 3,722,544 people in 2021, consists of the Athens Urban Area with the addition of the towns and villages of East and West Attica, which surround the dense urban area of the Greek capital. It actually sprawls over the whole peninsula of Attica, which is the best part of the region of Attica, excluding the islands. Population in ancient times Mycenean Athens in 1600–1100 BC could have equalled the size of Tiryns, with an estimated population of up to 10,000–15,000. During the Greek Dark Ages the population of Athens was around 4,000 people, rising to an estimated 10,000 by 700 BC. During the Classical period, Athens denotes both the urban area of the city proper and its subject territory (the Athenian city-state) extending across most of the modern Attica region except the territory of the city-state of Megaris and the island section. In 500 BC the Athenian territory probably contained around 200,000 people. Thucydides indicates a fifth-century total of 150,000-350,000 and up to 610,000. A census ordered by Demetrius of Phalerum in 317 BC is said to have recorded 21,000 free citizens, 10,000 resident aliens and 400,000 slaves, a total population of 431,000, but this figure is highly suspect because of the improbably high number of slaves and does not include free women and children and resident foreigners. An estimate based on Thucydides is 40,000 male citizens, 100,000 family members, 70,000 metics (resident foreigners) and 150,000-400,000 slaves, though modern historians again hesitate to take such high numbers at face value, most estimates now preferring a total in the 200–350,000 range. The urban area of Athens proper (excluding the port of Piraeus) covered less than a thousandth of the area of the city-state, though its population density was of course far higher: modern estimates for the population of the built-up area tend to indicate around 35–45,000 inhabitants, though density of occupation, household size and whether there was a significant suburban population beyond the walls remain uncertain. The ancient site of the main city is centred on the rocky hill of the acropolis. Many towns existed in the Athenian territory. Acharnae, Afidnes, Cytherus, Colonus, Corydallus, Cropia, Decelea, Euonymos, Vravron among others were important towns in the Athenian countryside. The new port of Piraeus was located in the site between the passenger section of the modern port (named Kantharos in antiquity) and Pasalimani harbour (named Zea in antiquity). The old port (Phaliro) was in the site of modern Palaio Faliro and gradually declined after the construction of the new port, but remained as a minor port and important settlement with historic significance in late Classical times. Modern Expansion The rapid expansion of the modern city, which continues to this day, took off with industrial growth in the 1950s and 1960s. The expansion is now particularly toward the East and North East (a tendency greatly related to the new Eleftherios Venizelos International Airport and the Attiki Odos, the freeway that cuts across Attica). By this process Athens has engulfed many former suburbs and villages in Attica, and continues to do so. The table below shows the historical population of Athens in recent times. The metropolitan population reached a peak around 2006 and since then has stabilised and even dropped slightly at around 3.7 million. Government and politics Athens became the capital of Greece in 1834, following Nafplion, which was the provisional capital from 1829. The municipality (City) of Athens is also the capital of the Attica region. The term Athens can refer either to the Municipality of Athens, to Greater Athens or urban area, or to the entire Athens Metropolitan Area. International relations and influence Twin towns – sister cities Athens is twinned with: Partnerships Belgrade, Serbia (1966) Paris, France (2000) Ljubljana, Slovenia Naples, Italy Yerevan, Armenia (1993) Other locations named after Athens United States Canada Athens Township, Ontario (pop. 3,086) Costa Rica Atenas (pop. 7,716) Atenas (canton) (pop. 23,743) Germany Athenstedt, Saxony-Anhalt (pop. 431) Honduras Atenas De San Cristóbal, Atlántida Italy Atena Lucana, Province of Salerno, Campania (pop. 2,344) Atina, Province of Frosinone, Lazio (pop. 4,480) Poland Ateny, Podlaskie Voivodeship (pop. 40) Ukraine Afini (Zoria – Зоря), Donetsk (pop. 200) Economy Athens is the financial capital of Greece. According to data from 2014, Athens as a metropolitan economic area produced US$130 billion as GDP in PPP, which consists of nearly half of the production for the whole country. Athens was ranked 102nd in that year's list of global economic metropolises, while GDP per capita for the same year was 32,000 US-dollars. Athens is one of the major economic centres in south-eastern Europe and is considered a regional economic power. The port of Piraeus, where big investments by COSCO have already been delivered during the recent decade, the completion of the new Cargo Centre in Thriasion, the expansion of the Athens Metro and the Athens Tram, as well as the Hellenikon metropolitan park redevelopment in Elliniko and other urban projects, are the economic landmarks of the upcoming years. Prominent Greek companies such as Hellas Sat, Hellenic Aerospace Industry, Mytilineos Holdings, Titan Cement, Hellenic Petroleum, Papadopoulos E.J., Folli Follie, Jumbo S.A., OPAP, and Cosmote have their headquarters in the metropolitan area of Athens. Multinational companies such as Ericsson, Sony, Siemens, Motorola, Samsung, Microsoft, Teleperformance, Novartis, Mondelez and Coca-Cola also have their regional research and development headquarters in the city. The banking sector is represented by National Bank of Greece, Alpha Bank, Eurobank, and Piraeus Bank, while the Bank of Greece is also situated in the City Centre. The Athens Stock Exchange was severely hit by the Greek government-debt crisis and the decision of the government to proceed into capital controls during summer 2015. As a whole the economy of Athens and Greece was strongly affected, while data showed a change from long recession to growth of 1.4% from 2017 onwards. Tourism is also a leading contributor to the economy of the city, as one of Europe's top destinations for city-break tourism, and also the gateway for excursions to both the islands and other parts of the mainland. Greece attracted 26.5 million visitors in 2015, 30.1 million visitors in 2017, and over 33 million in 2018, making Greece one of the most visited countries in Europe and the world, and contributing 18% to the country's GDP. Athens welcomed more than 5 million tourists in 2018, and 1.4 million were "city-breakers"; this was an increase by over a million city-breakers since 2013. Transport Athens is the country's major transportation hub. The city has Greece's largest airport and its largest port; Piraeus, too, is the largest container transport port in the Mediterranean, and the largest passenger port in Europe. Athens is a major national hub for Intercity (Ktel) and international buses, as well as for domestic and international rail transport. Public transport is serviced by a variety of transportation means, making up the country's largest mass transit system. The Athens Mass Transit System consists of a large bus and trolleybus fleet, the city's Metro, a Suburban Railway service and a tram network, connecting the southern suburbs to the city centre. Bus transport OSY () (Odikes Sygkoinonies S.A.), a subsidiary company of OASA (Athens urban transport organisation), is the main operator of buses and trolleybuses in Athens. As of 2017, its network consists of around 322 bus lines, spanning the Athens Metropolitan Area, and making up a fleet of 2,375 buses and trolleybuses. Of those 2,375, 619 buses run on compressed natural gas, making up the largest fleet of natural gas-powered buses in Europe, and 354 are electric-powered (trolleybuses). All of the 354 trolleybuses are equipped to run on diesel in case of power failure. International links are provided by a number of private companies. National and regional bus links are provided by KTEL from two InterCity Bus Terminals; Kifissos Bus Terminal A and Liosion Bus Terminal B, both located in the north-western part of the city. Kifissos provides connections towards Peloponnese, North Greece, West Greece and some Ionian Islands, whereas Liosion is used for most of Central Greece. Athens Metro The Athens Metro is operated by STASY S.A () (Statheres Sygkoinonies S.A), a subsidiary company of OASA (Athens urban transport organisation), which provides public transport throughout the Athens Urban Area. While its main purpose is transport, it also houses Greek artifacts found during the construction of the system. The Athens Metro runs three metro lines, namely Line 1 (Green Line), Line 2 (Red Line) and Line 3 (Blue Line) lines, of which the first was constructed in 1869, and the other two largely during the 1990s, with the initial new sections opened in January 2000. Line 1 mostly runs at ground level and the other two (Line 2 & 3) routes run entirely underground. A fleet of 42 trains, using 252 carriages, operates on the network, with a daily occupancy of 1,353,000 passengers. Line 1 (Green Line) serves 24 stations, and is the oldest line of the Athens metro network. It runs from Piraeus station to Kifissia station and covers a distance of . There are transfer connections with the Blue Line 3 at Monastiraki station and with the Red Line 2 at Omonia and Attiki stations. Line 2 (Red Line) runs from Anthoupoli station to Elliniko station and covers a distance of . The line connects the western suburbs of Athens with the southeast suburbs, passing through the center of Athens. The Red Line has transfer connections with the Green Line 1 at Attiki and Omonia stations. There are also transfer connections with the Blue Line 3 at Syntagma station and with the tram at Syntagma, Syngrou Fix and Neos Kosmos stations. Line 3 (Blue Line) runs from Nikaia station, through the central Monastiraki and Syntagma stations to Doukissis Plakentias avenue in the northeastern suburb of Halandri. It then ascends to ground level and continues to Athens International Airport Eleftherios Venizelos using the suburban railway infrastructure, extending its total length to . The spring 2007 extension from Monastiraki westwards to Egaleo connected some of the main night life hubs of the city, namely those of Gazi (Kerameikos station) with Psirri (Monastiraki station) and the city centre (Syntagma station). Extensions are under construction to the western and southwestern suburbs of Athens, as far as the Port of Piraeus. The new stations will be Maniatika, Piraeus and Dimotiko Theatro, and the completed extension will be ready in 2022, connecting the biggest port of Greece, the Port of Piraeus, with Athens International Airport, the biggest airport of Greece. Commuter/suburban rail (Proastiakos) The Athens Suburban Railway, referred to as the Proastiakos, connects Athens International Airport to the city of Kiato, west of Athens, via Larissa station, the city's central rail station and the port of Piraeus. The length of Athens's commuter rail network extends to , and is expected to stretch to by 2010. Tram The Athens Tram is operated by STASY S.A (Statheres Sygkoinonies S.A), a subsidiary company of OASA (Athens urban transport organisation). It has a fleet of 35 Sirio type vehicles which serve 48 stations, employ 345 people with an average daily occupancy of 65,000 passengers. The tram network spans a total length of and covers ten Athenian suburbs. The network runs from Syntagma Square to the southwestern suburb of Palaio Faliro, where the line splits in two branches; the first runs along the Athens coastline toward the southern suburb of Voula, while the other heads toward Neo Faliro. The network covers the majority of the Athens coastline. Further extension is under construction towards the major commercial port of Piraeus. The expansion to Piraeus will include 12 new stations, increase the overall length of tram route by , and increase the overall transportation network. Athens International Airport Athens is served by the Athens International Airport (ATH), located near the town of Spata, in the eastern Messoghia plain, some east of center of Athens. The airport, awarded the "European Airport of the Year 2004" Award, is intended as an expandable hub for air travel in southeastern Europe and was constructed in 51 months, costing 2.2 billion euros. It employs a staff of 14,000. Railways and ferry connections Athens is the hub of the country's national railway system (OSE), connecting the capital with major cities across Greece and abroad (Istanbul, Sofia, Belgrade and Bucharest). The Port of Piraeus is the largest port in Greece and one of the largest in Europe. Rafina and Lavrio act as alternative ports of Athens, connects the city with numerous Greek islands of the Aegean Sea, Evia and Çeşme in Turkey, while also serving the cruise ships that arrive. Motorways Two main motorways of Greece begin in Athens, namely the A1/E75, heading north towards Greece's second largest city, Thessaloniki; and the border crossing of Evzones and the A8/E94 heading west, towards Greece's third largest city, Patras, which incorporated the GR-8A. Before their completion much of the road traffic used the GR-1 and the GR-8. Athens' Metropolitan Area is served by the motorway network of the Attiki Odos toll-motorway (code: A6). Its main section extends from the western industrial suburb of Elefsina to Athens International Airport; while two beltways, namely the Aigaleo Beltway (A65) and the Hymettus Beltway (A64) serve parts of western and eastern Athens respectively. The span of the Attiki Odos in all its length is , making it the largest metropolitan motorway network in all of Greece. Motorways: A1/E75 N (Lamia, Larissa, Thessaloniki) A8 (GR-8A)/E94 W (Elefsina, Corinth, Patras) A6 W (Elefsina) E (Airport) National roads: GR-1 Ν (Lamia, Larissa, Thessaloniki) GR-8 W (Corinth, Patras) GR-3 N (Elefsina, Lamia, Larissa) Education Located on Panepistimiou Street, the old campus of the University of Athens, the National Library, and the Athens Academy form the "Athens Trilogy" built in the mid-19th century. The largest and oldest university in Athens is the National and Kapodistrian University of Athens. Most of the functions of NKUA have been transferred to a campus in the eastern suburb of Zografou. The National Technical University of Athens is located on Patision Street. The University of West Attica is the second largest university in Athens. The seat of the university is located in the western area of Athens, where the philosophers of Ancient Athens delivered lectures. All the activities of UNIWA are carried out in the modern infrastructure of the three University Campuses within the metropolitan region of Athens (Egaleo Park, Ancient Olive Groove and Athens), which offer modern teaching and research spaces, entertainment and support facilities for all students. Other universities that lie within Athens are the Athens University of Economics and Business, the Panteion University, the Agricultural University of Athens and the University of Piraeus. There are overall ten state-supported Institutions of Higher (or Tertiary) education located in the Athens Urban Area, these are by chronological order: Athens School of Fine Arts (1837), National Technical University of Athens (1837), National and Kapodistrian University of Athens (1837), Agricultural University of Athens (1920), Athens University of Economics and Business (1920), Panteion University of Social and Political Sciences (1927), University of Piraeus (1938), Harokopio University of Athens (1990), School of Pedagogical and Technological Education (2002), University of West Attica (2018). There are also several other private colleges, as they called formally in Greece, as the establishment of private universities is prohibited by the constitution. Many of them are accredited by a foreign state or university such as the American College of Greece and the Athens Campus of the University of Indianapolis. Culture Archaeological hub The city is a world centre of archaeological research. Alongside national academic institutions, such as the Athens University and the Archaeological Society, it is home to multiple archaeological museums, taking in the National Archaeological Museum, the Cycladic Museum, the Epigraphic Museum, the Byzantine & Christian Museum, as well as museums at the ancient Agora, Acropolis, Kerameikos, and the Kerameikos Archaeological Museum. The city is also the setting for the Demokritos laboratory for Archaeometry, alongside regional and national archaeological authorities forming part of the Greek Department of Culture. Athens hosts 17 Foreign Archaeological Institutes which promote and facilitate research by scholars from their home countries. As a result, Athens has more than a dozen archaeological libraries and three specialized archaeological laboratories, and is the venue of several hundred specialized lectures, conferences and seminars, as well as dozens of archaeological exhibitions each year. At any given time, hundreds of international scholars and researchers in all disciplines of archaeology are to be found in the city. Architecture Athens incorporates architectural styles ranging from Greco-Roman and Neoclassical to Modern. They are often to be found in the same areas, as Athens is not marked by a uniformity of architectural style. A visitor will quickly notice the absence of tall buildings: Athens has very strict height restriction laws in order to ensure the Acropolis hill is visible throughout the city. Despite the variety in styles, there is evidence of continuity in elements of the architectural environment through the city's history. For the greatest part of the 19th century Neoclassicism dominated Athens, as well as some deviations from it such as Eclecticism, especially in the early 20th century. Thus, the Old Royal Palace was the first important public building to be built, between 1836 and 1843. Later in the mid and late 19th century, Theophil Freiherr von Hansen and Ernst Ziller took part in the construction of many neoclassical buildings such as the Athens Academy and the Zappeion Hall. Ziller also designed many private mansions in the centre of Athens which gradually became public, usually through donations, such as Schliemann's Iliou Melathron. Beginning in the 1920s, modern architecture including Bauhaus and Art Deco began to exert an influence on almost all Greek architects, and buildings both public and private were constructed in accordance with these styles. Localities with a great number of such buildings include Kolonaki, and some areas of the centre of the city; neighbourhoods developed in this period include Kypseli. In the 1950s and 1960s during the extension and development of Athens, other modern movements such as the International style played an important role. The centre of Athens was largely rebuilt, leading to the demolition of a number of neoclassical buildings. The architects of this era employed materials such as glass, marble and aluminium, and many blended modern and classical elements. After World War II, internationally known architects to have designed and built in the city included Walter Gropius, with his design for the US Embassy, and, among others, Eero Saarinen, in his postwar design for the east terminal of the Ellinikon Airport. Urban sculpture Across the city numerous statues or busts are to be found. Apart from the neoclassicals by Leonidas Drosis at the Academy of Athens (Plato, Socrates, Apollo and Athena), others in notable categories include the statue of Theseus by Georgios Fytalis at Thiseion; depictions of philhellenes such as Lord Byron, George Canning, and William Gladstone; the equestrian statue of Theodoros Kolokotronis by Lazaros Sochos in front of the Old Parliament; statues of Ioannis Kapodistrias, Rigas Feraios and Adamantios Korais at the University; of Evangelos Zappas and Konstantinos Zappas at the Zappeion; Ioannis Varvakis at the National Garden; the" Woodbreaker" by Dimitrios Filippotis; the equestrian statue of Alexandros Papagos in the Papagou district; and various busts of fighters of Greek independence at the Pedion tou Areos. A significant landmark is also the Tomb of the Unknown Soldier in Syntagma. Museums Athens' most important museums include: the National Archaeological Museum, the largest archaeological museum in the country, and one of the most important internationally, as it contains a vast collection of antiquities. Its artefacts cover a period of more than 5,000 years, from late Neolithic Age to Roman Greece; the Benaki Museum with its several branches for each of its collections including ancient, Byzantine, Ottoman-era, Chinese art and beyond; the Byzantine and Christian Museum, one of the most important museums of Byzantine art; the National Art Gallery, the nation's eponymous leading gallery, which reopened in 2021 after renovation; the National Museum of Contemporary Art, which opened in 2000 in a former brewery building; the Numismatic Museum, housing a major collection of ancient and modern coins; the Museum of Cycladic Art, home to an extensive collection of Cycladic art, including its famous figurines of white marble; the New Acropolis Museum, opened in 2009, and replacing the old museum on the Acropolis. The new museum has proved considerably popular; almost one million people visited during the summer period June–October 2009 alone. A number of smaller and privately owned museums focused on Greek culture and arts are also to be found. the Kerameikos Archaeological Museum, a museum which displays artifacts from the burial site of Kerameikos. Much of the pottery and other artifacts relate to Athenian attitudes towards death and the afterlife, throughout many ages. the Jewish Museum of Greece, a museum which describes the history and culture of the Greek Jewish community. Tourism Athens has been a destination for travellers since antiquity. Over the past decade, the city's infrastructure and social amenities have improved, in part because of its successful bid to stage the 2004 Olympic Games. The Greek Government, aided by the EU, has funded major infrastructure projects such as the state-of-the-art Eleftherios Venizelos International Airport, the expansion of the Athens Metro system, and the new Attiki Odos Motorway. Entertainment and performing arts Athens is home to 148 theatrical stages, more than any other city in the world, including the ancient Odeon of Herodes Atticus, home to the Athens Festival, which runs from May to October each year. In addition to a large number of multiplexes, Athens plays host to open air garden cinemas. The city also supports music venues, including the Athens Concert Hall (Megaro Moussikis), which attracts world class artists. The Athens Planetarium, located in Andrea Syngrou Avenue, in Palaio Faliro is one of the largest and best equipped digital planetaria in the world. The Stavros Niarchos Foundation Cultural Center, inaugurated in 2016, will house the National Library of Greece and the Greek National Opera. In 2018 Athens was designated as the World Book Capital by UNESCO. Restaurants, tavernas and bars can be found in the entertainment hubs in Plaka and the Trigono areas of the historic centre, the inner suburbs of Gazi and Psyrri are especially busy with nightclubs and bars, while Kolonaki, Exarchia, Metaxourgeio, Koukaki and Pangrati offer more of a cafe and restaurant scene. The coastal suburbs of Microlimano, Alimos and Glyfada include many tavernas, beach bars and busy summer clubs. Music The most successful songs during the period 1870–1930 were the so-called Athenian serenades (Αθηναϊκές καντάδες), based on the Heptanesean kantádhes (καντάδες 'serenades'; sing.: καντάδα) and the songs performed on stage (επιθεωρησιακά τραγούδια 'theatrical revue songs') in revues, musical comedies, operettas and nocturnes that were dominating Athens' theatre scene. Notable composers of operettas or nocturnes were Kostas Giannidis, Dionysios Lavrangas, Nikos Hatziapostolou, while Theophrastos Sakellaridis' The Godson remains probably the most popular operetta. Despite the fact that the Athenian songs were not autonomous artistic creations (in contrast with the serenades) and despite their original connection with mainly dramatic forms of art, they eventually became hits as independent songs. Notable actors of Greek operettas, who made also a series of melodies and songs popular at the time, include Orestis Makris, the Kalouta sisters, Vasilis Avlonitis, Afroditi Laoutari, Eleni Papadaki, Marika Nezer, Marika Krevata and others. After 1930, receptive to both American and other European musical influences as well as the homegrown musical tradition, Greek composers begin to write music using elements of the tango, waltz, swing, foxtrot, sometimes combined with melodies in the style of Athenian serenades' repertory. Nikos Gounaris was probably the most renowned composer and singer of this time. In 1922, following the war, genocide and later population exchange suffered by the Greek population of Asia Minor, many ethnic Greeks fled to Athens. They settled in poor neighbourhoods and brought with them Rebetiko music, making it also popular in Greece, and which later became the base for the Laïko music. Other forms of song popular today in Greece are elafrolaika, entechno, dimotika, and skyladika. Greece's most notable, and internationally famous, composers of Greek song, mainly of the entechno form, are Manos Hadjidakis and Mikis Theodorakis. Both composers have achieved fame abroad for their composition of film scores. Sports Athens has a long tradition in sports and sporting events, serving as home to the most important clubs in Greek sport and housing a large number of sports facilities. The city has also been host to sports events of international importance. Athens has hosted the Summer Olympic Games twice, in 1896 and 2004. The 2004 Summer Olympics required the development of the Athens Olympic Stadium, which has since gained a reputation as one of the most beautiful stadiums in the world, and one of its most interesting modern monuments. The biggest stadium in the country, it hosted two finals of the UEFA Champions League, in 1994 and 2007. Athens' other major stadium, located in the Piraeus area, is the Karaiskakis Stadium, a sports and entertainment complex, host of the 1971 UEFA Cup Winners' Cup Final. Athens has hosted the EuroLeague final three times, the first in 1985 and second in 1993, both at the Peace and Friendship Stadium, most known as SEF, a large indoor arena, and the third time in 2007 at the Olympic Indoor Hall. Events in other sports such as athletics, volleyball, water polo etc., have been hosted in the capital's venues. Athens is home to three European multi-sport clubs: Panathinaikos, originated in Athens city centre, Olympiacos, originated in the suburb of Piraeus and AEK Athens, originated in the suburb of Nea Filadelfeia. In football, Panathinaikos made it to the 1971 European Cup Final, Olympiacos have dominated domestic competitions, while AEK Athens is the other member of the big three. These clubs also have basketball teams; Panathinaikos and Olympiacos are among the top powers in European basketball, having won the Euroleague six times and three respectively, whilst AEK Athens was the first Greek team to win a European trophy in any team sport. Other notable clubs within Athens are Athinaikos, Panionios, Atromitos, Apollon, Panellinios, Egaleo F.C., Ethnikos Piraeus, Maroussi BCE and Peristeri B.C. Athenian clubs have also had domestic and international success in other sports. The Athens area encompasses a variety of terrain, notably hills and mountains rising around the city, and the capital is the only major city in Europe to be bisected by a mountain range. Four mountain ranges extend into city boundaries and thousands of kilometres of trails criss-cross the city and neighbouring areas, providing exercise and wilderness access on foot and bike. Beyond Athens and across the prefecture of Attica, outdoor activities include skiing, rock climbing, hang gliding and windsurfing. Numerous outdoor clubs serve these sports, including the Athens Chapter of the Sierra Club, which leads over 4,000 outings annually in the area. Sports clubs Beside the above clubs, inside the boundaries of Athens Municipality there are some more clubs with presence in national divisions or notable action for short periods. Some of them are PAO Rouf (Rouf) with earlier presence in Gamma Ethniki, (Petralona), football club founded in 1963, with earlier presence in Beta Ethniki, (Kolonos), football club founded in 1919 with short presence in Gamma Ethniki, (Kypseli), football club founded in 1938 with short presence in Gamma Ethniki, (Gyzi), basketball club founded in 1937 with short presence in Beta Ethniki basketball and (Agios Panteleimonas), basketball club founded in 1992 with earlier presence in A2 Ethniki Basketball. Another important Athenian sport club is the Athens Tennis Club founded in 1895 with important offer for the Greek tennis. Olympic Games 1896 Summer Olympics The revival of the modern Olympic Games was brought forth in 1896, by Frenchman Pierre de Coubertin. Thanks to his efforts, Athens was awarded the first modern Olympic Games. In 1896, the city had a population of 123,000 and the event helped boost the city's international profile. Of the venues used for these Olympics, the Kallimarmaro Stadium, and Zappeion were most crucial. The Kallimarmaro is a replica of the ancient Athenian stadiums, and the only major stadium (in its capacity of 60,000) to be made entirely of white marble from Mount Penteli, the same material used for construction of the Parthenon. 1906 Summer Olympics The 1906 Summer Olympics, or the 1906 Intercalated games, were held in Athens. The intercalated competitions were intermediate games to the internationally organized Olympics, and were meant to be organized in Greece every four years, between the main Olympics. This idea later lost support from the IOC and these games were discontinued. 2004 Summer Olympics Athens was awarded the 2004 Summer Olympics on 5 September 1997 in Lausanne, Switzerland, after having lost a previous bid to host the 1996 Summer Olympics, to Atlanta, United States. It was to be the second time Athens would host the games, following the inaugural event of 1896. After an unsuccessful bid in 1990, the 1997 bid was radically improved, including an appeal to Greece's Olympic history. In the last round of voting, Athens defeated Rome with 66 votes to 41. Prior to this round, the cities of Buenos Aires, Stockholm and Cape Town had been eliminated from competition, having received fewer votes. During the first three years of preparations, the International Olympic Committee had expressed concern over the speed of construction progress for some of the new Olympic venues. In 2000, the Organising Committee's president was replaced by Gianna Angelopoulos-Daskalaki, who was the president of the original Bidding Committee in 1997. From that point forward, preparations continued at a highly accelerated, almost frenzied pace. Although the heavy cost was criticized, estimated at $1.5 billion, Athens was transformed into a more functional city that enjoys modern technology both in transportation and in modern urban development. The games welcomed over 10,000 athletes from all 202 countries. The 2004 Games were judged a success, as both security and organization worked well, and only a few visitors reported minor problems mainly concerning accommodation issues. The 2004 Olympic Games were described as "unforgettable, dream games", by IOC President Jacques Rogge for their return to the birthplace of the Olympics, and for meeting the challenges of holding the Olympic Games. The only observable problem was a somewhat sparse attendance of some early events. Eventually, however, a total of more than 3.5 million tickets were sold, which was higher than any other Olympics with the exception of Sydney (more than 5 million tickets were sold there in 2000). In 2008, it was reported that most of the Olympic venues had fallen into disrepair: according to those reports, 21 of the 22 facilities built for the games had either been left abandoned or are in a state of dereliction, with several squatter camps having sprung up around certain facilities, and a number of venues afflicted by vandalism, graffiti or strewn with rubbish. These claims were disputed and are likely to be inaccurate, as most of the facilities used for the Athens Olympics are either in use or in the process of being converted for post-Olympics use. The Greek Government has created a corporation, Olympic Properties SA, which is overseeing the post-Olympics management, development and conversion of these facilities, some of which will be sold off (or have already been sold off) to the private sector, while other facilities are still in use just as during the Olympics, or have been converted for commercial use or modified for other sports. Concerts and theatrical shows, such as those by the troupe Cirque du Soleil, have recently been held in the complex. See also Outline of Athens Timeline of Athens References External links Official website of the Municipality of Athens Ancient Greek archaeological sites in Greece Archaeological sites in Attica Capitals in Europe Capitals of Greek states City-states Greek regional capitals Populated coastal places in Greece Populated places established in the 5th century BC Populated places in ancient Greece Populated places in Central Athens (regional unit) Roman sites in Greece

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

Anguilla

Anguilla ( ) is a British Overseas Territory in the Caribbean. It is one of the most northerly of the Leeward Islands in the Lesser Antilles, lying east of Puerto Rico and the Virgin Islands and directly north of Saint Martin. The territory consists of the main island of Anguilla, approximately long by wide at its widest point, together with a number of much smaller islands and cays with no permanent population. The territory's capital is The Valley. The total land area of the territory is , with a population of approximately (). Etymology The native Arawak name for the island was Malliouhana. In reference to the island's shape, the Italian , meaning "eel" (in turn, from the Latin diminutive of anguis, "snake") was used as its name. History Anguilla was first settled by Indigenous Amerindian peoples who migrated from South America. The earliest Native American artefacts found on Anguilla have been dated to around 1300 BC; remains of settlements date from AD 600. There are two known petroglyph sites in Anguilla: Big Spring and Fountain Cavern. The rock ledges of Big Spring contain over 100 petroglyphs (dating back to AD 600-1200), the majority consisting of three indentations that form faces. Precisely when Anguilla was first seen by Europeans is uncertain: some sources claim that Columbus sighted the island during his second voyage in 1493, while others state that the first European explorer was the French Huguenot nobleman and merchant René Goulaine de Laudonnière in 1564. The Dutch West India Company established a fort on the island in 1631. However, the Company later withdrew after its fort was destroyed by the Spanish in 1633. Traditional accounts state that Anguilla was first colonised by English settlers from Saint Kitts beginning in 1650. The settlers focused on planting tobacco, and to a lesser extent cotton. The French temporarily took over the island in 1666 but returned it to English control under the terms of the Treaty of Breda the next year. Major John Scott who visited in September 1667, wrote of leaving the island "in good condition" and noted that in July 1668, "200 or 300 people fled thither in time of war". The French attacked again in 1688, 1745 and 1798, causing much destruction but failing to capture the island. It is likely that the early European settlers brought enslaved Africans with them. Historians confirm that African slaves lived in the region in the early 17th century, such as slaves from Senegal living on St Kitts in the mid-1600s. By 1672 a slave depot existed on the island of Nevis, serving the Leeward Islands. While the time of African arrival in Anguilla is difficult to place precisely, archival evidence indicates a substantial African presence of at least 100 enslaved people by 1683; these seem to have come from Central Africa as well as West Africa. The slaves were forced to work on the sugar plantations which had begun to replace tobacco as Anguilla's main crop. Over time the African slaves and their descendants came to vastly outnumber the white settlers. The African slave trade was eventually terminated within the British Empire in 1807, and slavery outlawed completely in 1834. Many planters subsequently sold up or left the island. During the early colonial period, Anguilla was administered by the British through Antigua; in 1825, it was placed under the administrative control of nearby Saint Kitts. Anguilla was federated with St Kitts and Nevis in 1882, against the wishes of many Anguillans. Economic stagnation, and the severe effects of several droughts in the 1890s and later the Great Depression of the 1930s led many Anguillans to emigrate for better prospects elsewhere. Full adult suffrage was introduced to Anguilla in 1952. After a brief period as part of the West Indies Federation (1958–62), the island of Anguilla became part of the associated state of Saint Kitts-Nevis-Anguilla with full internal autonomy in 1967. However many Anguillans had no wish to be a part of this union, and resented the dominance of St Kitts within it. On 30 May 1967 Anguillans forcibly ejected the St Kitts police force from the island and declared their separation from St Kitts following a referendum. The events, led by Atlin Harrigan and Ronald Webster among others, became known as the Anguillan Revolution; its goal was not independence per se, but rather independence from Saint Kitts and Nevis and a return to being a British colony. With negotiations failing to break the deadlock, a second referendum confirming Anguillans' desire for separation from St Kitts was held and the Republic of Anguilla was declared unilaterally, with Ronald Webster as president. Efforts by British envoy William Whitlock failed to break the impasse and 300 British troops were subsequently sent in March 1969. British authority was restored, and confirmed by the Anguilla Act of July 1971. In 1980, Anguilla was finally allowed to formally secede from Saint Kitts and Nevis and become a separate British Crown colony (now a British overseas territory). Since then, Anguilla has been politically stable, and has seen a large growth in its tourism and offshore financing sectors. Geography and geology Anguilla is a flat, low-lying island of coral and limestone in the Caribbean Sea, measuring some 16 miles (26 km) long and 3.5 miles (6 km) in width. It lies to the east of Puerto Rico and the Virgin Islands and directly north of Saint Martin, separated from that island by the Anguilla Channel. The soil is generally thin and poor, supporting scrub, tropical and forest vegetation. The terrain is generally low-lying, with the highest terrain located in the vicinity of The Valley; Crocus Hill, Anguilla's highest peak at , lies in the western regions of the town. Anguilla is noted for its ecologically important coral reefs and beaches. Apart from the main island of Anguilla itself, the territory includes a number of other smaller islands and cays, mostly tiny and uninhabited: Anguillita Blowing Rock Dog Island Little Scrub Island Prickly Pear Cays Scrub Island Seal Island Sombrero, also known as Hat Island Sandy Island Scilly Cay Geology Anguilla (and the wider Anguilla Bank) is of volcanic origin, lying on the Lesser Antilles volcanic island arc, and tuffs and volcaniclastic breccias of Eocene age are exposed locally on the island. The island was largely submerged during the Miocene, leading to the formation of the reefal limestone Anguilla Formation, which was subsequently tectonically uplifted and cover most of the island today. Since the late Pleistocene, however, Anguilla has undergone tectonic subsidence at a rate of around 1-2mm/yr. Climate Temperature Northeastern trade winds keep this tropical island relatively cool and dry. Average annual temperature is . July–October is its hottest period, December–February, its coolest. Rainfall Rainfall averages annually, although the figures vary from season to season and year to year. The island is subject to both sudden tropical storms and hurricanes, which occur in the period from July to November. The island suffered damage in 1995 from Hurricane Luis and severe flooding from Hurricane Lenny in 1999. Governance Political system Anguilla is an internally self-governing overseas territory of the United Kingdom. Its politics take place in a framework of a parliamentary representative democratic dependency, whereby the Premier is the head of government, and of a pluriform multi-party system. The United Nations Committee on Decolonization includes Anguilla on the United Nations list of non-self-governing territories. The territory's constitution is the Anguilla Constitutional Order 1 April 1982 (amended 1990). Executive power is exercised by the government, with legislative power being vested in both the government and the House of Assembly. The judiciary is independent of the executive and the legislature. Defence As a British overseas territory, the UK is responsible for Anguilla's military defence, although there are no active garrisons or armed forces present in the territory. Since 2020, the Royal Navy has forward-deployed the offshore patrol vessel HMS Medway long-term to the Caribbean for patrol and sovereignty protection duties. Anguilla had a small marine police force, comprising around 32 personnel, which operated one VT Halmatic M160-class 52-foot fast patrol boat. Policing on the island is the responsibility of the Royal Anguilla Police Force. Population Demographics The majority of residents (90.08%) are black, most of whom are the descendants of enslaved people transported from Africa. Minorities include whites at 3.74% and people of mixed race at 4.65% (figures from 2001 census). 72% of the population is Anguillan while 28% is non-Anguillan (2001 census). Of the non-Anguillan population, many are citizens of the United States, United Kingdom, St Kitts & Nevis, the Dominican Republic, Jamaica and Nigeria. 2006 and 2007 saw an influx of large numbers of Chinese, Indian and Mexican workers, brought in as labour for major tourist developments due to the local population not being large enough to support the labour requirements. Religion Christian churches did not have a consistent or strong presence during the initial period of English colonisation; spiritual and religious practices of Europeans and Africans tended to reflect their regional origins. As early as 1813, Christian ministers formally ministered to enslaved Africans and promoted literacy among converts. The Wesleyan (Methodist) Missionary Society of England built churches and schools from 1817. According to the 2001 census, Christianity is Anguilla's predominant religion, with 29% of the population practising Anglicanism; another 23.9% are Methodist. Other churches on the island include Seventh-day Adventist, Baptist, Roman Catholic (served by the Diocese of Saint John's–Basseterre, with the See at Saint John on Antigua and Barbuda) and a small community of Jehovah's Witnesses (0.7%). Between 1992 and 2001, the number of followers of the Church of God and Pentecostals increased considerably. There are at least 15 churches on the island. Although a minority on the island, Anguilla is an important location to followers of Rastafarian religion as the birthplace of Robert Athlyi Rogers, author of the Holy Piby which had a strong influence on Rastafarian and other Africa-centre belief systems. More recently, a Muslim cultural centre has opened on the island. Languages Today most people in Anguilla speak a British-influenced variety of standard English. Other languages are also spoken on the island, including varieties of Spanish, Chinese and the languages of other immigrant communities. However, the most common language other than Standard English is the island's own English-lexifier Creole language (not to be confused with Antillean Creole ('French Creole'), spoken in French islands such as Martinique and Guadeloupe). It is referred to locally by terms such as "dialect" (pronounced "dialek"), Anguilla Talk or "Anguillian". It has its main roots in early varieties of English and West African languages, and is similar to the dialects spoken in English-speaking islands throughout the Eastern Caribbean in terms of its structural features. Linguists who are interested in the origins of Anguillan and other Caribbean Creoles point out that some of its grammatical features can be traced to African languages while others can be traced to European languages. Three areas have been identified as significant for the identification of the linguistic origins of those forced migrants who arrived before 1710: the Gold Coast, the Slave Coast and the Windward Coast. Sociohistorical information from Anguilla's archives suggest that Africans and Europeans formed two distinct, but perhaps overlapping speech communities in the early phases of the island's colonisation. "Anguillian" is believed to have emerged as the language of the masses as time passed, slavery was abolished and locals began to see themselves as "belonging" to Anguillan society. Education There are six government primary schools, one government secondary school (Albena Lake Hodge Comprehensive School), and two private schools. There is a single library, the Edison L. Hughes Education & Library Complex of the Anguilla Public Library. A branch of the Saint James School of Medicine was established in 2011 in Anguilla. It is a private, for-profit medical school headquartered in Park Ridge, Illinois. There is a University of the West Indies Open campus site in the island. Culture The island's cultural history begins with the native Taino, Arawak and Carib. Their artefacts have been found around the island, telling of life before European settlers arrived. The Anguilla National Trust (ANT) was established in 1989 and opened its current office in 1991 charged with the responsibility of preserving the heritage of the island, including its cultural heritage. As throughout the Caribbean, holidays are a cultural fixture. Anguilla's most important holidays are of historic as much as cultural importance – particularly the anniversary of the emancipation (previously August Monday in the Park), celebrated as the Summer Festival, or Carnival. British festivities, such as the King's Birthday, are also celebrated. Cuisine Anguillan cuisine is influenced by native Caribbean, African, Spanish, French, and English cuisines. Seafood is abundant, including prawns, shrimp, crab, spiny lobster, conch, mahi-mahi, red snapper, marlin, and grouper. Salt cod is a staple food eaten on its own and used in stews, casseroles and soups. Livestock is limited due to the small size of the island and people there use poultry, pork, goat, and mutton, along with imported beef. Goat is the most commonly eaten meat, used in a variety of dishes. The official national food of Anguilla is pigeon peas and rice. A significant amount of the island's produce is imported due to limited land suitable for agriculture production; much of the soil is sandy and infertile. The agriculture produce of Anguilla includes tomatoes, peppers, limes and other citrus fruits, onion, garlic, squash, pigeon peas, and callaloo. Starch staple foods include imported rice and other foods that are imported or locally grown, including yams, sweet potatoes and breadfruit. Literature The Anguilla National Trust has programmes encouraging Anguillan writers and the preservation of the island's history. In 2015, Where I See The Sun – Contemporary Poetry in Anguilla A New Anthology by Lasana M. Sekou was published by House of Nehesi Publishers. Among the forty three poets in the collection are Rita Celestine-Carty, Bankie Banx, John T. Harrigan, Patricia J. Adams, Fabian Fahie, Dr. Oluwakemi Linda Banks, and Reuel Ben Lewi. Music Various Caribbean musical genres are popular on the island, such as reggae, soca and calypso. Sports Boat racing has deep roots in Anguillan culture and is the national sport. There are regular sailing regattas on national holidays, such as Carnival, which are contested by locally built and designed boats. These boats have names and have sponsors that print their logo on their sails. As in many other former British colonies, cricket is also a popular sport. Anguilla is the home of Omari Banks, who played for the West Indies Cricket Team, while Cardigan Connor played first-class cricket for English county side Hampshire and was 'chef de mission' (team manager) for Anguilla's Commonwealth Games team in 2002. Other noted players include Chesney Hughes, who played for Derbyshire County Cricket Club in England. Rugby union is represented in Anguilla by the Anguilla Eels RFC, who were formed in April 2006. The Eels have been finalists in the St. Martin tournament in November 2006 and semi-finalists in 2007, 2008, 2009 and Champions in 2010. The Eels were formed in 2006 by Scottish club national second row Martin Welsh, Club Sponsor and President of the AERFC Ms. Jacquie Ruan, and Canadian standout Scrumhalf Mark Harris (Toronto Scottish RFC). Anguilla is the birthplace of sprinter Zharnel Hughes who has represented Great Britain since 2015, and England at the 2018 Commonwealth Games. He won the 100 metres at the 2018 European Athletics Championships, the 4 x 100 metres at the same championships, and the 4 x 100 metres for England at the 2018 Commonwealth Games. He also won a relay team gold at the 2022 Birmingham Commonwealth Games and a silver on the relay for Great Britain at the 2020 Olympic Games. Shara Proctor, British Long Jump Silver Medalist in World Championships in Beijing first represented Anguilla in the event until 2010 when she began to represent Great Britain and England. Under the Anguillan Flag she achieved several medals in the NACAC games. Keith Connor, triple jumper, is also an Anguillan. He represented Great Britain and England and achieved several international titles including Commonwealth and European Games gold medals and an Olympic bronze medal. Keith later became Head Coach of Australia Athletics. Natural history Wildlife Anguilla has habitat for the Cuban tree frogs (Osteopilus septentrionalis). The red-footed tortoise (Chelonoidis carbonaria) is a species of tortoise found here, which originally came from South America. Hurricanes in the mid-90s led to over-water dispersal of the green iguanas (Iguana iguana) to Anguilla. All three animals are introductions. Five species of bats are known in the literature from Anguilla – the threatened insular single leaf bat (Monophyllus plethodon), the Antillean fruit-eating bat (Brachyphylla cavernarum), the Jamaican fruit bat (Artibeus jamaicensis), the Mexican funnel-eared bat (Natalus stramineus), and the velvety free-tailed bat (Molossus molossus). Notable people Kelvin Liddie (born 1981), Anguillan football player Carlos Newton, former UFC Welterweight Champion Shara Proctor, longjump athlete Zharnel Hughes , sprinter Economy Anguilla's thin arid soil being largely unsuitable for agriculture, the island has few land-based natural resources. Its main industries are tourism, offshore incorporation and management, offshore banking, captive insurance and fishing. Anguilla's currency is the East Caribbean dollar, though the US dollar is also widely accepted. The exchange rate is fixed to the US dollar at US$1 = EC$2.70. The economy, and especially the tourism sector, suffered a setback in late 1995 due to the effects of Hurricane Luis in September. Hotels were hit particularly hard but a recovery occurred the following year. Another economic setback occurred during the aftermath of Hurricane Lenny in 2000. Before the 2008 worldwide crisis, the economy of Anguilla was growing strongly, especially the tourism sector, which was driving major new developments in partnerships with multi-national companies. Anguilla's tourism industry received a major boost when it was selected to host the World Travel Awards in December 2014. Known as "the Oscars of the travel industry", the awards ceremony was held at the CuisinArt Resort and Spa and was hosted by Vivica A. Fox. Anguilla was voted the World's Leading Luxury Island Destination from a short list of top-tier candidates such as St. Barts, the Maldives, and Mauritius. Anguilla's financial system comprises seven banks, two money services businesses, more than 40 company managers, more than 50 insurers, 12 brokers, more than 250 captive intermediaries, more than 50 mutual funds, and eight trust companies. Anguilla has become a popular tax haven, having no capital gains, estate, profit, sales, or corporate taxes. In April 2011, faced with a mounting deficit, it introduced a 3% "Interim Stabilisation Levy", Anguilla's first form of income tax. Anguilla also has a 0.75% property tax. Anguilla aims to obtain 15% of its energy from solar power to become less reliant on expensive imported diesel. The Climate & Development Knowledge Network is helping the government gather the information it needs to change the territory's legislation, so that it can integrate renewables into its grid. Barbados has also made good progress in switching to renewables, but many other Small Island Developing States are still at the early stages of planning how to integrate renewable energy into their grids. "For a small island we're very far ahead," said Beth Barry, Coordinator of the Anguilla Renewable Energy Office. "We've got an Energy Policy and a draft Climate Change policy and have been focusing efforts on the question of sustainable energy supply for several years now. As a result, we have a lot of information we can share with other islands." Transportation Air Anguilla is served by Clayton J. Lloyd International Airport (prior to 4 July 2010 known as Wallblake Airport). The primary runway at the airport is in length and can accommodate moderate-sized aircraft. Regional scheduled passenger services connect to various other Caribbean islands via local airlines. In December 2021 Anguilla inaugurated its first ever international regular commercial jet service flight to and from the mainland U.S. American Eagle operating on behalf of American Airlines began nonstop Embraer 175 regional jet service to Anguilla from Miami in an aviation watershed moment for Anguilla with the airport also currently attempting to attract other international air carriers. Other airlines currently serving the airport include Tradewind Aviation and Cape Air which provide scheduled air service to San Juan, Puerto Rico. Several other small airlines serve the airport as well. The airport can handle large narrow-body jets such as the Boeing 737 and Airbus A320 and has growing private jet service flights with a new private jet terminal being built. Road Aside from taxis, there is no public transport on the island. Cars drive on the left. Boat There are regular ferries from Saint Martin to Anguilla. It is a 20-minute crossing from Marigot, St. Martin to Blowing Point, Anguilla. Ferries commence service from 7:00 am. There is also a charter service, from Blowing Point, Anguilla to Princess Juliana Airport to make travel easier. This way of travel is the most common method of transport between Anguilla and St. Martin. See also Bibliography of Anguilla Outline of Anguilla Index of Anguilla-related articles References Further reading . . Harris, David R. - Plants, Animals and Man in the Outer Leeward Islands, West Indies. An Ecological Study of Antigua, Barbuda, and Anguilla. External links Government Government of Anguilla—Official government website General information Anguilla. The World Factbook. Central Intelligence Agency. Anguilla from UCB Libraries GovPubs battle for freedom -- youtube video compilation archived at Ghostarchive.org on 18 May 2022 Dependent territories in the Caribbean .Anguilla Leeward Islands (Caribbean) English-speaking countries and territories Island countries Former English colonies British Leeward Islands British West Indies Member states of the Organisation of Eastern Caribbean States States and territories established in 1980 Small Island Developing States 1650 establishments in the British Empire 1650 establishments in North America 1650s establishments in the Caribbean States and territories established in 1650

1223

https://en.wikipedia.org/wiki/Telecommunications%20in%20Anguilla

Telecommunications in Anguilla

This article is about communications systems in Anguilla. Telephone Telephones – main lines in use: 6,200 (2002) country comparison to the world: 212 Telephones – mobile cellular: 1,800 (2002) country comparison to the world: 211 Telephone system: Domestic: Modern internal telephone system International: EAST CARIBBEAN FIBRE SYSTEM ECFS (cable system) microwave radio relay to island of Saint Martin (Guadeloupe and Netherlands Antilles) Mobile phone (GSM) Mobile phone operators: FLOW (Anguilla) Ltd. – GSM and UMTS 850 and 1900 MHz, LTE 700 MHz with Island-wide coverage Digicel (Anguilla) Ltd. – GSM and UMTS 850 to 1900 MHz, LTE 700 MHz Mobiles: ? (2007) Radio Radio broadcast stations: AM 3, FM 7, shortwave 0 (2007) Radios: 3,000 (1997) Television Television broadcast stations: 1 (1997) Televisions: 1,000 (1997) Internet Internet country code: .ai (Top level domain) Internet Service Providers (ISPs): 2 (FLOW – , Digicel Anguilla – ) Internet hosts: 269 (2012) country comparison to the world: 192 Internet: users: 12,377 (2018) country comparison to the world: 206 See also Anguilla FLOW (Anguilla) Ltd. References External links Public Utilities Commission of Anguilla Anguilla, SubmarineCableMap.com Communications in Anguilla Anguilla Anguilla

1227

https://en.wikipedia.org/wiki/Ashmore%20and%20Cartier%20Islands

Ashmore and Cartier Islands

The Territory of Ashmore and Cartier Islands is an uninhabited external territory of Australia consisting of four low-lying tropical islands in two separate reefs, and the territorial sea generated by the islands. The territory is located in the Indian Ocean situated on the edge of the continental shelf, about off the northwest coast of Australia and south of the Indonesian island of Rote. Ashmore Reef is called Pulau Pasir by Indonesians and Nusa Solokaek in the Rotenese language. Both names have the meaning "sand island". Geography The territory comprises Ashmore Reef, which includes West, Middle, and East Islands, and two lagoons, and Cartier Reef, which includes Cartier Island. Ashmore Reef covers approximately and Cartier Reef , both measurements extending to the limits of the reefs. West, Middle, and East Islands have a combined land area variously reported as , and . Cartier Island has a reported land area of . History According to Australian literature, Cartier Island was visited by Captain Nash in 1800, and named after his ship Cartier. Ashmore Island was seen by Captain Samuel Ashmore in 1811 from his ship Hibernia and named after him. Ashmore Island was annexed by the United Kingdom in 1878, as was Cartier Island in 1909. After their annexation, the British government occasionally granted licences on the islands for fishing or guano extraction. In the 1920s, the islands were used as a base for poachers targeting the Western Australian pearling industry. The lack of effective policing led to Australian lobbying for a transfer of control. A British order-in-council dated 23 July 1931 stated that Ashmore and Cartier Islands would be placed under the authority of the Commonwealth of Australia when Australia passed legislation to accept them, and formal administration began two years later. The Commonwealth's resulting Ashmore and Cartier Islands Acceptance Act 1933 came into operation on 10 May 1934, when the islands formally became a territory. The act authorised the Governor of Western Australia to make ordinances for the territory. In July 1938 the territory was annexed to the Northern Territory, then also administered by the Commonwealth, whose laws, ordinances and regulations applied to the Northern Territory. When self-government was granted to the Northern Territory on 1 July 1978, administration of Ashmore and Cartier Islands was retained by the Commonwealth. In 1983, the territory was declared a nature reserve under the National Parks and Wildlife Conservation Act 1975, now replaced by the Environment Protection and Biodiversity Conservation Act 1999. Cartier Island, which was a former bombing range, became a marine reserve in 2000. After the islands became a first point of contact with the Australian migration zone, in September 2001, the Australian government excised the Ashmore and Cartier Islands from the Australian migration zone. Indonesian heritage and memorandum Ashmore has been regularly visited and fished by Indonesian fishermen since the early eighteenth century. A 1974 Memorandum of Understanding (MOU) between Australia and Indonesia sets out arrangements by which traditional fishers can access resources in Australia's territorial sea in the region. This allows traditional Indonesian fishermen to access parts of Ashmore for shelter, freshwater and to visit grave sites. The area, known as the MOU Box, contains the Ashmore and Cartier Islands Territory. Governance Today, the territory is administered from Canberra by the Department of Infrastructure, Regional Development and Cities, which is also responsible for the administration of the territories of Christmas Island, Cocos (Keeling) Islands, the Coral Sea Islands, Jervis Bay Territory and Norfolk Island. The Attorney-General's Department had been responsible for the administration of Australian territories until the 2010 federal election. In that year the responsibility for Australian territories was transferred to the then Department of Regional Australia, Local Government, Arts and Sport, and from 18 September 2013 the Department of Infrastructure and Regional Development has administered Australian territories. Defence of Ashmore and Cartier Islands is the responsibility of Australia, with periodic visits by the Royal Australian Navy, Royal Australian Air Force and the Australia Border Force. Nearby Hibernia Reef, northeast of Ashmore Reef, is not part of the Territory, but belongs to Western Australia. It has no permanently dry land area, although large parts of the reef become exposed during low tide. Environment and protection The Ashmore Reef Marine Park and Cartier Island Marine Park are both classed as strict nature reserves (IUCN Ia) and protect biodiverse areas of significant and international importance, as well as cultural heritage. Cartier Island is an unvegetated sand island, with access prohibited because of the risk of unexploded ordnances. There are no ports or harbours, only offshore anchorage. Today, all the wells in the Territory are infected with cholera or contaminated and undrinkable. The Australian Border Force vessel is stationed off the reef for up to 300 days per year. The islands are also visited by seasonal caretakers and occasional scientific researchers. Economy The area around the Ashmore and Cartier Islands has been a traditional fishing ground of Indonesian fishermen for centuries, and continues. In the 1850s, American whalers operated in the region. Outside of fishing, the islands were historically used as sources of guano, beche-de-mer, trochus and tortoiseshell. Mining of phosphate deposits took place on Ashmore Island in the latter half of the 19th century. Petroleum extraction activities take place at the Jabiru and Challis oil fields, which are adjacent to the Territory, and which are administered by the Northern Territory's Department of Mines and Energy on behalf of the Commonwealth. Migration As Ashmore Reef is the closest point of Australian territory to Indonesia, it was a popular target for people smugglers transporting asylum seekers en route to Australia. Once they had landed on Ashmore Island, asylum seekers could claim to have entered Australian migration zone and request to be processed as refugees. The use of Ashmore Island for this purpose created great notoriety during late 2001, when refugee arrivals became a major political issue in Australia. The Australian Government argued that as Australia was not the country of first asylum for these "boat people", Australia did not have a responsibility to accept them. A number of things were done to discourage the use of the Territory for this purpose, such as attempting to have the people smugglers arrested in Indonesia; the so-called Pacific Solution of processing them in third countries; the boarding and forced turnaround of the boats by Australian military forces; and finally excising the Territory and many other small islands from the Australian migration zone. Two boatloads of asylum seekers were each detained for several days in the lagoon at Ashmore Island after failed attempts by the Royal Australian Navy to turn them back to Indonesia in October 2001. See also Immigration detention in Australia SIEV 36 References External links Ashmore and Cartier Islands. The World Factbook. Central Intelligence Agency. Geoscience Australia—Ashmore and Cartier Islands Department of the Environment and Heritage—Ashmore Reef National Nature Reserve Department of the Environment and Heritage—Cartier Island Commonwealth Marine Reserve First on list of Australian islands "Ashmore Reef Belongs to Indonesia," posted on East Timor Action Network. "Ashmore Islands are member of ARABOSAI" Ramsar sites in Australia Important Bird Areas of Australian External Territories Immigration to Australia Territorial disputes of Australia Territorial disputes of Indonesia Former British protectorates Ashmore Reef

1234

https://en.wikipedia.org/wiki/Acoustic%20theory

Acoustic theory

Acoustic theory is a scientific field that relates to the description of sound waves. It derives from fluid dynamics. See acoustics for the engineering approach. For sound waves of any magnitude of a disturbance in velocity, pressure, and density we have In the case that the fluctuations in velocity, density, and pressure are small, we can approximate these as Where is the perturbed velocity of the fluid, is the pressure of the fluid at rest, is the perturbed pressure of the system as a function of space and time, is the density of the fluid at rest, and is the variance in the density of the fluid over space and time. In the case that the velocity is irrotational (), we then have the acoustic wave equation that describes the system: Where we have Derivation for a medium at rest Starting with the Continuity Equation and the Euler Equation: If we take small perturbations of a constant pressure and density: Then the equations of the system are Noting that the equilibrium pressures and densities are constant, this simplifies to A Moving Medium Starting with We can have these equations work for a moving medium by setting , where is the constant velocity that the whole fluid is moving at before being disturbed (equivalent to a moving observer) and is the fluid velocity. In this case the equations look very similar: Note that setting returns the equations at rest. Linearized Waves Starting with the above given equations of motion for a medium at rest: Let us now take to all be small quantities. In the case that we keep terms to first order, for the continuity equation, we have the term going to 0. This similarly applies for the density perturbation times the time derivative of the velocity. Moreover, the spatial components of the material derivative go to 0. We thus have, upon rearranging the equilibrium density: Next, given that our sound wave occurs in an ideal fluid, the motion is adiabatic, and then we can relate the small change in the pressure to the small change in the density by Under this condition, we see that we now have Defining the speed of sound of the system: Everything becomes For Irrotational Fluids In the case that the fluid is irrotational, that is , we can then write and thus write our equations of motion as The second equation tells us that And the use of this equation in the continuity equation tells us that This simplifies to Thus the velocity potential obeys the wave equation in the limit of small disturbances. The boundary conditions required to solve for the potential come from the fact that the velocity of the fluid must be 0 normal to the fixed surfaces of the system. Taking the time derivative of this wave equation and multiplying all sides by the unperturbed density, and then using the fact that tells us that Similarly, we saw that . Thus we can multiply the above equation appropriately and see that Thus, the velocity potential, pressure, and density all obey the wave equation. Moreover, we only need to solve one such equation to determine all other three. In particular, we have For a moving medium Again, we can derive the small-disturbance limit for sound waves in a moving medium. Again, starting with We can linearize these into For Irrotational Fluids in a Moving Medium Given that we saw that If we make the previous assumptions of the fluid being ideal and the velocity being irrotational, then we have Under these assumptions, our linearized sound equations become Importantly, since is a constant, we have , and then the second equation tells us that Or just that Now, when we use this relation with the fact that , alongside cancelling and rearranging terms, we arrive at We can write this in a familiar form as This differential equation must be solved with the appropriate boundary conditions. Note that setting returns us the wave equation. Regardless, upon solving this equation for a moving medium, we then have See also Acoustic attenuation Sound Fourier analysis References Fluid dynamics Acoustics Sound

1235

https://en.wikipedia.org/wiki/Alexander%20Mackenzie%20%28politician%29

Alexander Mackenzie (politician)

Alexander Mackenzie (January 28, 1822 – April 17, 1892) was a Canadian politician who served as the second prime minister of Canada, in office from 1873 to 1878. Mackenzie was born in Logierait, Perthshire, Scotland. He left school at the age of 13, following his father's death to help his widowed mother, and trained as a stonemason. Mackenzie immigrated to Canada when he was 19, settling in what became Ontario. His masonry business prospered, allowing him to pursue other interests – such as the editorship of a pro-Reformist newspaper called the Lambton Shield. Mackenzie was elected to the Legislative Assembly of the Province of Canada in 1862, as a supporter of George Brown. In 1867, Mackenzie was elected to the new House of Commons of Canada for the Liberal Party. He became leader of the party (thus Leader of the Opposition) in mid-1873, and a few months later succeeded John A. Macdonald as prime minister, following Macdonald's resignation in the aftermath of the Pacific Scandal. Mackenzie and the Liberals won a clear majority at the 1874 election. He was popular among the general public for his humble background and apparent democratic tendencies. As prime minister, Mackenzie continued the nation-building programme that had been begun by his predecessor. His government established the Supreme Court of Canada and Royal Military College of Canada, and created the District of Keewatin to better administer Canada's newly acquired western territories. However, it made little progress on the transcontinental railway, and struggled to deal with the aftermath of the Panic of 1873. At the 1878 election, Mackenzie's government suffered a landslide defeat. He remained leader of the Liberal Party for another two years, and continued on as a Member of Parliament (MP) until his death, due to a stroke. Early life Mackenzie was born on January 28, 1822, in Logierait, Perthshire, Scotland, the son of Mary Stewart (Fleming) and Alexander Mackenzie Sr. (born 1784) who were married in 1817. The site of his birthplace is known as Clais-'n-deoir (the Hollow of the Weeping), where families said their goodbyes as the convicted were led to nearby Gallows Hill. The house in which he was born was built by his father. He was the third of 10 boys, seven of whom survived infancy. Alexander Mackenzie Sr. was a carpenter and ship's joiner who had to move around frequently for work after the end of the Napoleonic Wars in 1815. Mackenzie's father died on March 7, 1836, and at the age of 13, Alexander Mackenzie Jr. was thus forced to end his formal education to help support his family. He apprenticed as a stonemason and met his future wife, Helen Neil, in Irvine, where her father was also a stonemason. The Neils were Baptist and shortly thereafter, Mackenzie converted from Presbyterianism to Baptist beliefs. Together with the Neils, he immigrated to Canada in 1842 to seek a better life. Mackenzie's faith was to link him to the increasingly influential temperance cause, particularly strong in Canada West where he lived, a constituency of which he was to represent in the Parliament of Canada. The Neils and Mackenzie settled in Kingston, Ontario. The limestone in the area proved too hard for his stonemason tools, and not having money to buy new tools, Mackenzie took a job as a labourer constructing a building on Princess Street. The contractor on the job claimed financial difficulty, so Mackenzie accepted a promissory note for summer wages. The note later proved to be worthless. Subsequently, Mackenzie won a contract building a bomb-proof arch at Fort Henry. He later became a foreman on the construction of Kingston's four Martello Towers – Murney Tower, Fort Frederick, Cathcart Tower, and Shoal Tower. He was also a foreman on the construction of the Welland Canal and the Lachine Canal. While working on the Beauharnois Canal, a one-ton stone fell and crushed one of his legs. He recovered, but never regained the strength in that leg. While in Kingston, Mackenzie became a vocal opponent of religious and political entitlement and corruption in government. Mackenzie married Helen Neil (1826–52) in 1845 and with her had three children, with only one girl, Mary, surviving infancy. Helen and he moved to Sarnia, Ontario (known as Canada West) in 1847 and Mary was born in 1848. They were soon joined from Scotland by the rest of Mackenzie's brothers and his mother. He began working as a general contractor, earning a reputation for being a hard-working, honest man, as well as having a working man's view on fiscal policy. Mackenzie helped construct many courthouses and jails across southern Ontario. A number of these still stand today, including the Sandwich Courthouse and Jail now known as the Mackenzie Hall Cultural Centre in Windsor, Ontario, and the Kent County Courthouse and Jail in Chatham, Ontario. He even bid, unsuccessfully, on the construction of the Parliament buildings in Ottawa in 1859. Helen died in 1852, finally succumbing to the effects of excessive doses of mercury-based calomel used to treat a fever while in Kingston. In 1853, he married Jane Sym (1825–93). Early political involvement Mackenzie involved himself in politics almost from the moment he arrived in Canada. He fought passionately for equality and the elimination of all forms of class distinction. In 1851, he became the secretary for the Reform Party for Lambton. After convincing him to run in Kent/Lambton, Mackenzie campaigned relentlessly for George Brown, owner of the Reformist paper The Globe in the 1851 election, helping Brown to win his first seat in the Legislative Assembly. Mackenzie and Brown remained the closest of friends and colleagues for the rest of their lives. In 1852, Mackenzie became editor of another reformist paper, the Lambton Shield. As an editor, Mackenzie was perhaps a little too vocal, leading the paper to a lawsuit for libel against the local conservative candidate. Because a key witness claimed Cabinet Confidence and would not testify, the paper lost the suit and was forced to fold due to financial hardship. After his brother, Hope Mackenzie, declined to run, Alexander was petitioned to run and won his first seat in the Legislative Assembly as a supporter of George Brown in 1861. When Brown resigned from the Great Coalition in 1865 over reciprocity negotiations with the United States, Mackenzie was invited to replace him as the president of the council. Wary of Macdonald's motivations and true to his principles, Mackenzie declined. He entered the House of Commons of Canada in 1867, representing the Lambton, Ontario, riding. No cohesive national Liberal Party of Canada existed at the time and with Brown not winning his seat, no official leader emerged. Mackenzie did not believe he was the best qualified for the position, and although he resisted offers of the position, he nevertheless sat as the de facto leader of the Official Opposition. Prime Minister (1873–1878) When the Macdonald government fell due to the Pacific Scandal in 1873, the Governor General, Lord Dufferin, called upon Mackenzie, who had been chosen as the leader of the Liberal Party a few months earlier, to form a new government. Mackenzie formed a government and asked the Governor General to call an election for January 1874. The Liberals won a majority of the seats in the House of Commons having garnered 40% of the popular vote. Mackenzie remained prime minister until the 1878 election when Macdonald's Conservatives returned to power with a majority government. For a man of Mackenzie's humble origins to attain such a position was unusual in an age which generally offered such opportunity only to the privileged. Lord Dufferin expressed early misgivings about a stonemason taking over government, but on meeting Mackenzie, Dufferin revised his opinions: Mackenzie served concurrently as Minister of Public Works and oversaw the completion of the Parliament buildings. While drawing up the plans for the West Block, he included a circular staircase leading directly from his office to the outside of the building, which allowed him to escape the patronage-seekers waiting for him in his ante-chamber. Proving Dufferin's reflections on his character to be true, Mackenzie disliked intensely the patronage inherent in politics. Nevertheless, he found it a necessary evil to maintain party unity and ensure the loyalty of his fellow Liberals. In keeping with his democratic ideals, Mackenzie refused the offer of a knighthood three times, and was thus the only one of Canada's first eight Prime Ministers not to be knighted. He also declined appointment to the UK Privy Council and hence does not bear the title "Right Honourable". His pride in his working class origins never left him. Once, while touring Fort Henry as prime minister, he asked the soldier accompanying him if he knew the thickness of the wall beside them. The embarrassed escort confessed that he didn't and Mackenzie replied, "I do. It is five feet, ten inches. I know, because I built it myself!" As Prime Minister, Alexander Mackenzie strove to reform and simplify the machinery of government, achieving a remarkable record of reform legislation. He introduced the secret ballot; advised the creation of the Supreme Court of Canada; the establishment of the Royal Military College of Canada in Kingston in 1874; and the creation of the Office of the Auditor General in 1878. He completed the Intercolonial Railway, but struggled to progress on the national railway due to a worldwide economic depression, almost coming to blows with the then Governor General Lord Dufferin over imperial interference. Mackenzie stood up for the rights of Canada as a nation and fought for the supremacy of Parliament and honesty in government. Above all else, he was known and loved for his honesty and integrity. However, his term was marked by economic depression that had grown out of the Panic of 1873, which Mackenzie's government was unable to alleviate. In 1874, Mackenzie negotiated a new free trade agreement with the United States, eliminating the high protective tariffs on Canadian goods in US markets. However, this action did not bolster the economy, and construction of the CPR slowed drastically due to lack of funding. In 1876, the Conservative opposition announced a National Policy of protective tariffs, which resonated with voters. When an election was held at the conclusion of Mackenzie's five-year term, the Conservatives were swept back into office in a landslide victory. Supreme Court appointments Mackenzie chose the following jurists to be appointed as justices of the Supreme Court of Canada by the Governor General: Sir William Buell Richards (Chief Justice) – September 30, 1875 Télesphore Fournier – September 30, 1875 William Alexander Henry – September 30, 1875 Sir William Johnstone Ritchie – September 30, 1875 Sir Samuel Henry Strong – September 30, 1875 Jean-Thomas Taschereau – September 30, 1875 Sir Henri Elzéar Taschereau – October 7, 1878 Later life After his government's defeat, Mackenzie remained Leader of the Opposition for another two years, until 1880. In 1881, he became the first president of The North American Life Assurance Company. He was soon struck with a mysterious ailment that sapped his strength and all but took his voice. Sitting in silence, he nevertheless remained an undefeated MP until his death in 1892 from a stroke that resulted from hitting his head during a fall. He died in Toronto and was buried in Lakeview Cemetery in Sarnia, Ontario. Character Mackenzie's first biography in 1892 referred to him as Canada's Stainless Statesman. He was a devout Baptist and teetotaller who found refuge in, and drew strength from, his family, friends, and faith. He was also a loyal friend and an incorrigible prankster (stuffed chimney on young in-laws; rolled boulder down Thunder Cape towards friend A. McKellar; burned Tory campaign placards in hotel woodstove early in morning). Unpretentious and down to earth, his public official austerity was in striking contrast to private compassion and giving nature. He was the soul of honour and integrity, a proud man who sought no recognition or personal enrichment and accepted gifts reluctantly. He preferred to follow than lead (unreferenced – many times he refused leadership offers) and often found duty outweighed heavy burden of office. He was uncompromising on his principles, perhaps too much so. An historian at the time said, "He was, and ever will remain, the Sir Galahad of Canadian politics." Very proud of his Scottish heritage, he was forever a Scot: "Nemo me impune lacessit" (no one attacks me with impunity). The Upper Canada rebellion leader W.L. Mackenzie referred to him, "He is every whit a self-made, self-educated man. Has large mental capacity and indomitable energy." Canada's Governor General, Lord Dufferin, said of him, he is "as pure as crystal, and as true as steel, with lots of common sense." A close friend, Chief Justice Sir Louis Davies, said he was "the best debater the House of Commons has ever known." A friend and colleague in Cabinet who went on to become prime minister of Canada, Sir Wilfrid Laurier, said he was "one of the truest and strongest characters to be met within Canadian history. He was endowed with a warm heart and a copious and rich fancy, though veiled by a somewhat reticent exterior, and he was of friends the most tender and true." Another friend and colleague, who went on to become premier of Ontario, Sir George Ross, said, "Mackenzie was sui generis a debater. His humorous sallies blistered like a blast from a flaming smelter. His sterling honesty is a great heritage, and will keep his memory green to all future generations." At his eulogy, Rev. Dr. Thomas compared him to the Duke of Wellington, who "stood four square, to all the winds that blow." Newspaper around the world and in Canada had this to say about him. The London Times – the untiring energy, the business-like accuracy, the keen perception and reliable judgment, and above all the inflexible integrity, which marked his private life, he carried without abatement of one jot into his public career. The Westminster Review – a man, who although, through failing health and failing voice, he had virtually passed out of public life, yet retained to the last the affectionate veneration of the Canadian people as no other man of the time can be said to have done. The Charlottetown Patriot – in all that constitutes the real man, the honest statesman, the true patriot, the warm friend, and sincere Christian, he had few equals. Possessed of a clear intellect, a retentive memory, and a ready command of appropriate words, he was one of the most logical and powerful speakers we have ever heard. The St. John Telegraph – he was loved by the people and his political opponents were compelled to respect him even above their own chosen leader. As a statesman, he has had few equals. The Montreal Star – it is one of the very foremost architects of the Canadian nationality that we mourn. In the dark days of ’73, Canadians were in a state of panic, distrusting the stability of their newly-built Dominion; no one can tell what would have happened had not the stalwart form of Alexander Mackenzie lifted itself above the screaming, vociferating and denying mass of politicians, and all Canada felt at once, there was a man who could be trusted. The Toronto Globe – he was a man who loved the people and fought for their rights against privilege and monopoly in every form. The Philadelphia Record – Like Caesar, who twice refused a knightly crown, Alexander Mackenzie refused knighthood three times. Unlike Caesar, he owed his political overthrow to his incorruptible honesty and unswerving integrity. Legacy In their 1999 study of the Prime Ministers of Canada, which included the results of a survey of Canadian historians, J. L. Granatstein and Norman Hillmer found that Mackenzie was in 11th place just after John Sparrow David Thompson. Namesakes The following are named in honour of Alexander Mackenzie: The Mackenzie Mountain Range in the Yukon and Northwest Territories Mount Mackenzie, in the Selkirk Mountains of British Columbia The Mackenzie Building, and the use of the Mackenzie tartan by the bands at the Royal Military College of Canada in Kingston, Ontario, "Alexander Mackenzie", the Royal Military College of Canada March for bagpipes, was composed in his honour by Pipe Major Don M. Carrigan, who was the College Pipe Major 1973 to 1985. Mackenzie Hall in Windsor, Ontario Alexander Mackenzie Scholarships in Economics and Political Science at McGill University and the University of Toronto Alexander MacKenzie Park in Sarnia, Ontario Alexander Mackenzie High School in Sarnia Alexander Mackenzie Housing Co-Operative Inc. in Sarnia Mackenzie Avenue, Ottawa, Ontario Mackenzie Tower, West Block, Parliament Hill, Ottawa, Ontario Other honours A monument is dedicated to his tomb in Lakeview Cemetery, Sarnia, Ontario "Honourable Alexander Mackenzie" (1964) by Lawren Harris, head of the Department of Fine Arts, Mount Allison University, now hangs in the Mackenzie Building, Royal Military College of Canada. The unveiling ceremony was performed by the Right Honourable Louis St. Laurent, a Canadian former Prime Minister, and the gift was accepted by the Commandant, Air Commodore L.J. Birchall. The painting was commissioned in memory of No. 244, Lieut.-Col, F.B. Wilson, O.B.E., her deceased husband, by Mrs, F.W. Dashwood. Also taking part in the ceremony was the Honourable Paul Hellyer, Minister of National Defence, President and Chancellor of the college. In attendance was Mrs. Burton R. Morgan of Ottawa, great-granddaughter of Alexander Mackenzie. Burgess tickets presented to Alexander Mackenzie in Dundee, Dunkeld, Logierait, Irvine, and Perth Scotland Electoral record See also List of prime ministers of Canada References Citations Works cited General sources Alexander Mackenzie fonds at Library and Archives Canada Further reading . External links Photograph:Alexander Mackenzie, 1874 – McCord Museum Prime Ministers of Canada Leaders of the Liberal Party of Canada Provincial Secretaries of Ontario Members of the Legislative Assembly of the Province of Canada from Canada West Businesspeople from Ontario Canadian journalists 19th-century Scottish writers People from Sarnia People from Perth and Kinross Scottish emigrants to pre-Confederation Ontario 1822 births 1892 deaths Leaders of the Opposition (Canada) Persons of National Historic Significance (Canada) Canadian Baptists 19th-century Canadian journalists Canadian male journalists 19th-century British male writers Immigrants to the Province of Canada 19th-century Baptists 19th-century Scottish businesspeople

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

Ashoka

Ashoka (, ; also Asoka;  – 232 BCE), popularly known as Ashoka the Great, was the third emperor of the Maurya Empire of the Indian subcontinent during to 232 BCE. His empire covered a large part of the Indian subcontinent, stretching from present-day Afghanistan in the west to present-day Bangladesh in the east, with its capital at Pataliputra. A patron of Buddhism, he is credited with playing an important role in the spread of Buddhism across ancient Asia. Much of the information about Ashoka comes from his Brahmi edicts, which are among the earliest long inscriptions of ancient India, and the Buddhist legends written centuries after his death. Ashoka was a son of Bindusara, and a grandson of the dynasty's founder Chandragupta. During his father's reign, he served as the governor of Ujjain in central India. According to some Buddhist legends, he also suppressed a revolt in Takshashila as a prince, and after his father's death, killed his brothers to ascend the throne. Ashoka's edicts state that during his eighth regnal year (), he conquered Kalinga after a brutal war, and the destruction caused by the war made him repent violence. This claim is omitted in his inscriptions found in the Kalinga region, possibly because Ashoka considered it politically inappropriate to admit his remorse before the people of Kalinga, or because the claims made in the edicts are not fully accurate and are meant to impress the people of other regions. Ashoka subsequently devoted himself to the propagation of "dhamma" or righteous conduct, the major theme of the edicts. Ashoka's edicts suggest that a few years after the Kalinga War, he was gradually drawn towards Buddhism. The Buddhist legends do not mention the Kalinga War at all, and variously state that Ashoka converted to Buddhism after being dissatisfied with the leaders of the other faiths or after witnessing miracles performed by Buddhist leaders. They credit Ashoka with establishing a large number of stupas, patronising the Third Buddhist council, supporting Buddhist missionaries, making generous donations to the sangha, and even persecuting non-Buddhists. The historicity of these legends is debated among modern historians, as they are often inconsistent with the edicts and among themselves, contain mythological elements, and exaggerate Ashoka's wickedness before and his piousness after his conversion to Buddhism. Ashoka's own edicts suggest that he favoured Buddhism, but also patronised the other major contemporary faiths including Brahmanism, Jainism, and Ājīvikaism. Ashoka's existence as a historical king had almost been forgotten, but this changed with the decipherment of the Brahmi script in the 19th century. Historians connected the titles Priyadasi and Devanampriya mentioned in his edicts to the Ashoka of Buddhist legends, and established Ashoka's reputation as one of the greatest Indian emperors. The emblem of the modern Republic of India is an adaptation of the Lion Capital of Ashoka. Sources of information Information about Ashoka comes from his inscriptions; other inscriptions that mention him or are possibly from his reign; and ancient literature, especially Buddhist texts. These sources often contradict each other, although various historians have attempted to correlate their testimony. So, for example, while Ashoka is often attributed with building many hospitals during his time, there is no clear evidence that any hospitals existed in ancient India during the 3rd century BC or that Ashoka was responsible for commissioning the construction of any. Inscriptions Ashoka's inscriptions are the earliest self-representations of imperial power in the Indian subcontinent. However, these inscriptions are focused mainly on the topic of dhamma, and provide little information regarding other aspects of the Maurya state or society. Even on the topic of dhamma, the content of these inscriptions cannot be taken at face value. In the words of American academic John S. Strong, it is sometimes helpful to think of Ashoka's messages as propaganda by a politician whose aim is to present a favourable image of himself and his administration, rather than record historical facts. A small number of other inscriptions also provide some information about Ashoka. For example, he finds a mention in the 2nd century Junagadh rock inscription of Rudradaman. An inscription discovered at Sirkap mentions a lost word beginning with "Priy", which is theorised to be Ashoka's title "Priyadarshi", although this is not certain. Some other inscriptions, such as the Sohgaura copper plate inscription, have been tentatively dated to Ashoka's period by some scholars, although others contest this. Buddhist legends Much of the information about Ashoka comes from Buddhist legends, which present him as a great, ideal king. These legends appear in texts that are not contemporary to Ashoka and were composed by Buddhist authors, who used various stories to illustrate the impact of their faith on Ashoka. This makes it necessary to exercise caution while relying on them for historical information. Among modern scholars, opinions range from downright dismissal of these legends as mythological to acceptance of all historical portions that seem plausible. The Buddhist legends about Ashoka exist in several languages, including Sanskrit, Pali, Tibetan, Chinese, Burmese, Sinhala, Thai, Lao, and Khotanese. All these legends can be traced to two primary traditions: the North Indian tradition preserved in the Sanskrit-language texts such as Divyavadana (including its constituent Ashokavadana); and Chinese sources such as A-yü wang chuan and A-yü wang ching. the Sri Lankan tradition preserved in Pali-lanuage texts, such as Dipavamsa, Mahavamsa, Vamsatthapakasini (a commentary on Mahavamsa), Buddhaghosha's commentary on the Vinaya, and Samanta-pasadika. There are several significant differences between the two traditions. For example, the Sri Lankan tradition emphasizes Ashoka's role in convening the Third Buddhist council, and his dispatch of several missionaries to distant regions, including his son Mahinda to Sri Lanka. However, the North Indian tradition makes no mention of these events. It describes other events not found in the Sri Lankan tradition, such as a story about another son named Kunala. Even while narrating the common stories, the two traditions diverge in several ways. For example, both Ashokavadana and Mahavamsa mention that Ashoka's queen Tishyarakshita had the Bodhi Tree destroyed. In Ashokavadana, the queen manages to have the tree healed after she realises her mistake. In the Mahavamsa, she permanently destroys the tree, but only after a branch of the tree has been transplanted in Sri Lanka. In another story, both the texts describe Ashoka's unsuccessful attempts to collect a relic of Gautama Buddha from Ramagrama. In Ashokavadana, he fails to do so because he cannot match the devotion of the Nagas who hold the relic; however, in the Mahavamsa, he fails to do so because the Buddha had destined the relic to be enshrined by King Dutthagamani of Sri Lanka. Using such stories, the Mahavamsa glorifies Sri Lanka as the new preserve of Buddhism. Other sources Numismatic, sculptural, and archaeological evidence supplements research on Ashoka. Ashoka's name appears in the lists of Mauryan kings in the various Puranas. However, these texts do not provide further details about him, as their Brahmanical authors were not patronised by the Mauryans. Other texts, such as the Arthashastra and Indica of Megasthenes, which provide general information about the Maurya period, can also be used to make inferences about Ashoka's reign. However, the Arthashastra is a normative text that focuses on an ideal rather than a historical state, and its dating to the Mauryan period is a subject of debate. The Indica is a lost work, and only parts of it survive in the form of paraphrases in later writings. The 12th-century text Rajatarangini mentions a Kashmiri king Ashoka of Gonandiya dynasty who built several stupas: some scholars, such as Aurel Stein, have identified this king with the Maurya king Ashoka; others, such as Ananda W. P. Guruge dismiss this identification as inaccurate. Alternative interpretation of the epigraphic evidence For some scholars, such as Christopher I. Beckwith, Ashoka, whose name only appears in the Minor Rock Edicts, is not the same as king Piyadasi, or Devanampiya Piyadasi (i.e. "Beloved of the Gods Piyadasi", "Beloved of the Gods" being a fairly widespread title for "King"), who is named as the author of the Major Pillar Edicts and the Major Rock Edicts. Beckwith suggests that Piyadasi was living in the 3rd century BCE, was probably the son of Chandragupta Maurya known to the Greeks as Amitrochates, and only advocated for piety ("Dharma") in his Major Pillar Edicts and Major Rock Edicts, without ever mentioning Buddhism, the Buddha, or the Samgha (the single notable exception is the 7th Edict of the Major Pillar Edicts which does mention the Samgha, but is a considered a later fake by Beckwith). Also, the geographical spread of his inscription shows that Piyadasi ruled a vast Empire, contiguous with the Seleucid Empire in the West. On the contrary, for Beckwith, Ashoka was a later king of the 1st–2nd century CE, whose name only appears explicitly in the Minor Rock Edicts and allusively in the Minor Pillar Edicts, and who does mention the Buddha and the Samgha, explicitly promoting Buddhism. The name "Priyadarsi" does occur in two of the minor edicts (Gujarra and Bairat), but Beckwith again considers them as later fabrications. The minor inscriptions cover a very different and much smaller geographical area, clustering in Central India. According to Beckwith, the inscriptions of this later Ashoka were typical of the later forms of "normative Buddhism", which are well attested from inscriptions and Gandhari manuscripts dated to the turn of the millennium, and around the time of the Kushan Empire. The quality of the inscriptions of this Ashoka is significantly lower than the quality of the inscriptions of the earlier Piyadasi. Names and titles The name "A-shoka" literally means "without sorrow". According to an Ashokavadana legend, his mother gave him this name because his birth removed her sorrows. The name Priyadasi is associated with Ashoka in the 3rd–4th century CE Dipavamsa. The term literally means "he who regards amiably", or "of gracious mien" (Sanskrit: Priya-darshi). It may have been a regnal name adopted by Ashoka. A version of this name is used for Ashoka in Greek-language inscriptions: βασιλεὺς Πιοδασσης ("Basileus Piodassēs"). Ashoka's inscriptions mention his title Devanampiya (Sanskrit: Devanampriya, "Beloved of the Gods"). The identification of Devanampiya and Ashoka as the same person is established by the Maski and Gujarra inscriptions, which use both these terms for the king. The title was adopted by other kings, including the contemporary king Devanampiya Tissa of Anuradhapura and Ashoka's descendant Dasharatha Maurya. Date The exact date of Ashoka's birth is not certain, as the extant contemporary Indian texts did not record such details. It is known that he lived in the 3rd century BCE, as his inscriptions mention several contemporary rulers whose dates are known with more certainty, such as Antiochus II Theos, Ptolemy II Philadelphus, Antigonus II Gonatas, Magas of Cyrene, and Alexander (of Epirus or Corinth). Thus, Ashoka must have been born sometime in the late 4th century BCE or early 3rd century BCE (), Ancestry Ashoka's own inscriptions are fairly detailed but make no mention of his ancestors. Other sources, such as the Puranas and the Mahavamsa state that his father was the Mauryan emperor Bindusara, and his grandfather was Chandragupta – the founder of the Empire. The Ashokavadana also names his father as Bindusara, but traces his ancestry to Buddha's contemporary king Bimbisara, through Ajatashatru, Udayin, Munda, Kakavarnin, Sahalin, Tulakuchi, Mahamandala, Prasenajit, and Nanda. The 16th century Tibetan monk Taranatha, whose account is a distorted version of the earlier traditions, describes Ashoka as the illegitimate son of king Nemita of Champarana from the daughter of a merchant. Ashokavadana states that Ashoka's mother was the daughter of a Brahmin from Champa, and was prophesied to marry a king. Accordingly, her father took her to Pataliputra, where she was inducted into Bindusara's harem, and ultimately, became his chief queen. The Ashokavadana does not mention her by name, although other legends provide different names for her. For example, the Asokavadanamala calls her Subhadrangi. The Vamsatthapakasini or Mahavamsa-tika, a commentary on Mahavamsa, calls her "Dharma" ("Dhamma" in Pali), and states that she belonged to the Moriya Kshatriya clan. A Divyavadana legend calls her Janapada-kalyani; according to scholar Ananda W. P. Guruge, this is not a name, but an epithet. According to the 2nd-century historian Appian, Chandragupta entered into a marital alliance with the Greek ruler Seleucus I Nicator, which has led to speculation that either Chandragupta or his son Bindusara married a Greek princess. However, there is no evidence that Ashoka's mother or grandmother was Greek, and most historians have dismissed the idea. As a prince Ashoka's own inscriptions do not describe his early life, and much of the information on this topic comes from apocryphal legends written hundreds of years after him. While these legends include obviously fictitious details such as narratives of Ashoka's past lives, they have some plausible historical information about Ashoka's period. According to the Ashokavadana, Bindusara disliked Ashoka because of his rough skin. One day, Bindusara asked the ascetic Pingala-vatsajiva to determine which of his sons was worthy of being his successor. He asked all the princes to assemble at the Garden of the Golden Pavilion on the ascetic's advice. Ashoka was reluctant to go because his father disliked him, but his mother convinced him to do so. When minister Radhagupta saw Ashoka leaving the capital for the Garden, he offered to provide the prince with a royal elephant for the travel. At the Garden, Pingala-vatsajiva examined the princes and realised that Ashoka would be the next king. To avoid annoying Bindusara, the ascetic refused to name the successor. Instead, he said that one who had the best mount, seat, drink, vessel and food would be the next king; each time, Ashoka declared that he met the criterion. Later, he told Ashoka's mother that her son would be the next king, and on her advice, left the kingdom to avoid Bindusara's wrath. While legends suggest that Bindusara disliked Ashoka's ugly appearance, they also state that Bindusara gave him important responsibilities, such as suppressing a revolt in Takshashila (according to north Indian tradition) and governing Ujjain (according to Sri Lankan tradition). This suggests that Bindusara was impressed by the other qualities of the prince. Another possibility is that he sent Ashoka to distant regions to keep him away from the imperial capital. Rebellion at Taxila According to the Ashokavadana, Bindusara dispatched prince Ashoka to suppress a rebellion in the city of Takshashila (present-day Bhir Mound in Pakistan). This episode is not mentioned in the Sri Lankan tradition, which instead states that Bindusara sent Ashoka to govern Ujjain. Two other Buddhist texts – Ashoka-sutra and Kunala-sutra – state that Bindusara appointed Ashoka as a viceroy in Gandhara (where Takshashila was located), not Ujjain. The Ashokavadana states that Bindusara provided Ashoka with a fourfold-army (comprising cavalry, elephants, chariots and infantry) but refused to provide any weapons for this army. Ashoka declared that weapons would appear before him if he was worthy of being a king, and then, the deities emerged from the earth and provided weapons to the army. When Ashoka reached Takshashila, the citizens welcomed him and told him that their rebellion was only against the evil ministers, not the king. Sometime later, Ashoka was similarly welcomed in the Khasa territory and the gods declared that he would go on to conquer the whole earth. Takshashila was a prosperous and geopolitically influential city, and historical evidence proves that by Ashoka's time, it was well-connected to the Mauryan capital Pataliputra by the Uttarapatha trade route. However, no extant contemporary source mentions the Takshashila rebellion, and none of Ashoka's records states that he ever visited the city. That said, the historicity of the legend about Ashoka's involvement in the Takshashila rebellion may be corroborated by an Aramaic-language inscription discovered at Sirkap near Taxila. The inscription includes a name that begins with the letters "prydr", and most scholars restore it as "Priyadarshi", which was the title of Ashoka. Another evidence of Ashoka's connection to the city may be the name of the Dharmarajika Stupa near Taxila; the name suggests that it was built by Ashoka ("Dharma-raja"). The story about the deities miraculously bringing weapons to Ashoka may be the text's way of deifying Ashoka; or indicating that Bindusara – who disliked Ashoka – wanted him to fail in Takshashila. Governor of Ujjain According to the Mahavamsa, Bindusara appointed Ashoka as the viceroy of present-day Ujjain (Ujjeni), which was an important administrative and commercial centre in the Avanti province of central India. This tradition is corroborated by the Saru Maru inscription discovered in central India; this inscription states that he visited the place as a prince. Ashoka's own rock edict mentions the presence of a prince viceroy at Ujjain during his reign, which further supports the tradition that he himself served as a viceroy at Ujjain. Pataliputra was connected to Ujjain by multiple routes in Ashoka's time, and on the way, Ashoka entourage may have encamped at Rupnath, where his inscription has been found. According to the Sri Lankan tradition, Ashoka visited Vidisha, where he fell in love with a beautiful woman on his way to Ujjain. According to the Dipamvamsa and Mahamvamsa, the woman was Devi – the daughter of a merchant. According to the Mahabodhi-vamsa, she was Vidisha-Mahadevi and belonged to the Shakya clan of Gautama Buddha. The Buddhist chroniclers may have fabricated the Shakya connection to connect Ashoka's family to Buddha. The Buddhist texts allude to her being a Buddhist in her later years but do not describe her conversion to Buddhism. Therefore, it is likely that she was already a Buddhist when she met Ashoka. The Mahavamsa states that Devi gave birth to Ashoka's son Mahinda in Ujjain, and two years later, to a daughter named Sanghamitta. According to the Mahavamsa, Ashoka's son Mahinda was ordained at the age of 20 years, during the sixth year of Ashoka's reign. That means Mahinda must have been 14 years old when Ashoka ascended the throne. Even if Mahinda was born when Ashoka was as young as 20 years old, Ashoka must have ascended the throne at 34 years, which means he must have served as a viceroy for several years. Ascension to the throne Legends suggest that Ashoka was not the crown prince, and his ascension on the throne was disputed. Ashokavadana states that Bindusara's eldest son Susima once slapped a bald minister on his head in jest. The minister worried that after ascending the throne, Susima may jokingly hurt him with a sword. Therefore, he instigated five hundred ministers to support Ashoka's claim to the throne when the time came, noting that Ashoka was predicted to become a chakravartin (universal ruler). Sometime later, Takshashila rebelled again, and Bindusara dispatched Susima to curb the rebellion. Shortly after, Bindusara fell ill and was expected to die soon. Susima was still in Takshashila, having been unsuccessful in suppressing the rebellion. Bindusara recalled him to the capital and asked Ashoka to march to Takshashila. However, the ministers told him that Ashoka was ill and suggested that he temporarily install Ashoka on the throne until Susmia's return from Takshashila. When Bindusara refused to do so, Ashoka declared that if the throne were rightfully his, the gods would crown him as the next king. At that instance, the gods did so, Bindusara died, and Ashoka's authority extended to the entire world, including the Yaksha territory located above the earth and the Naga territory located below the earth. When Susima returned to the capital, Ashoka's newly appointed prime minister Radhagupta tricked him into a pit of charcoal. Susima died a painful death, and his general Bhadrayudha became a Buddhist monk. The Mahavamsa states that when Bindusara fell sick, Ashoka returned to Pataliputra from Ujjain and gained control of the capital. After his father's death, Ashoka had his eldest brother killed and ascended the throne. The text also states that Ashoka killed ninety-nine of his half-brothers, including Sumana. The Dipavamsa states that he killed a hundred of his brothers and was crowned four years later. The Vamsatthapakasini adds that an Ajivika ascetic had predicted this massacre based on the interpretation of a dream of Ashoka's mother. According to these accounts, only Ashoka's uterine brother Tissa was spared. Other sources name the surviving brother Vitashoka, Vigatashoka, Sudatta (So-ta-to in A-yi-uang-chuan), or Sugatra (Siu-ka-tu-lu in Fen-pie-kung-te-hun). The figures such as 99 and 100 are exaggerated and seem to be a way of stating that Ashoka killed several of his brothers. Taranatha states that Ashoka, who was an illegitimate son of his predecessor, killed six legitimate princes to ascend the throne. It is possible that Ashoka was not the rightful heir to the throne and killed a brother (or brothers) to acquire the throne. However, the Buddhist sources have exaggerated the story, which attempts to portray him as evil before his conversion to Buddhism. Ashoka's Rock Edict No. 5 mentions officers whose duties include supervising the welfare of "the families of his brothers, sisters, and other relatives". This suggests that more than one of his brothers survived his ascension. However, some scholars oppose this suggestion, arguing that the inscription talks only about the families of his brothers, not the brothers themselves. Date of ascension According to the Sri Lankan texts Mahavamsa and the Dipavamsa, Ashoka ascended the throne 218 years after the death of Gautama Buddha and ruled for 37 years. The date of the Buddha's death is itself a matter of debate, and the North Indian tradition states that Ashoka ruled a hundred years after the Buddha's death, which has led to further debates about the date. Assuming that the Sri Lankan tradition is correct, and assuming that the Buddha died in 483 BCE – a date proposed by several scholars – Ashoka must have ascended the throne in 265 BCE. The Puranas state that Ashoka's father Bindusara reigned for 25 years, not 28 years as specified in the Sri Lankan tradition. If this is true, Ashoka's ascension can be dated three years earlier, to 268 BCE. Alternatively, if the Sri Lankan tradition is correct, but if we assume that the Buddha died in 486 BCE (a date supported by the Cantonese Dotted Record), Ashoka's ascension can be dated to 268 BCE. The Mahavamsa states that Ashoka consecrated himself as the king four years after becoming a sovereign. This interregnum can be explained assuming that he fought a war of succession with other sons of Bindusara during these four years. The Ashokavadana contains a story about Ashoka's minister Yashas hiding the sun with his hand. Professor P. H. L. Eggermont theorised that this story was a reference to a partial solar eclipse that was seen in northern India on 4 May 249 BCE. According to the Ashokavadana, Ashoka went on a pilgrimage to various Buddhist sites sometime after this eclipse. Ashoka's Rummindei pillar inscription states that he visited Lumbini during his 21st regnal year. Assuming this visit was a part of the pilgrimage described in the text, and assuming that Ashoka visited Lumbini around 1–2 years after the solar eclipse, the ascension date of 268–269 BCE seems more likely. However, this theory is not universally accepted. For example, according to John S. Strong, the event described in the Ashokavadana has nothing to do with chronology, and Eggermont's interpretation grossly ignores the literary and religious context of the legend. Reign before Buddhist influence Both Sri Lankan and North Indian traditions assert that Ashoka was a violent person before Buddhism. Taranatha also states that Ashoka was initially called "Kamashoka" because he spent many years in pleasurable pursuits (kama); he was then called "Chandashoka" ("Ashoka the fierce") because he spent some years performing evil deeds; and finally, he came to be known as Dhammashoka ("Ashoka the righteous") after his conversion to Buddhism. The Ashokavadana also calls him "Chandashoka", and describes several of his cruel acts: The ministers who had helped him ascend the throne started treating him with contempt after his ascension. To test their loyalty, Ashoka gave them the absurd order of cutting down every flower-and fruit-bearing tree. When they failed to carry out this order, Ashoka personally cut off the heads of 500 ministers. One day, during a stroll at a park, Ashoka and his concubines came across a beautiful Ashoka tree. The sight put him in an amorous mood, but the women did not enjoy caressing his rough skin. Sometime later, when Ashoka fell asleep, the resentful women chopped the flowers and the branches of his namesake tree. After Ashoka woke up, he burnt 500 of his concubines to death as punishment. Alarmed by the king's involvement in such massacres, prime minister Radha-Gupta proposed hiring an executioner to carry out future mass killings to leave the king unsullied. Girika, a Magadha village boy who boasted that he could execute the whole of Jambudvipa, was hired for the purpose. He came to be known as Chandagirika ("Girika the fierce"), and on his request, Ashoka built a jail in Pataliputra. Called Ashoka's Hell, the jail looked pleasant from the outside, but inside it, Girika brutally tortured the prisoners. The 5th-century Chinese traveller Faxian states that Ashoka personally visited the underworld to study torture methods there and then invented his methods. The 7th-century traveller Xuanzang claims to have seen a pillar marking the site of Ashoka's "Hell". The Mahavamsa also briefly alludes to Ashoka's cruelty, stating that Ashoka was earlier called Chandashoka because of his evil deeds but came to be called Dharmashoka because of his pious acts after his conversion to Buddhism. However, unlike the north Indian tradition, the Sri Lankan texts do not mention any specific evil deeds performed by Ashoka, except his killing of 99 of his brothers. Such descriptions of Ashoka as an evil person before his conversion to Buddhism appear to be a fabrication of the Buddhist authors, who attempted to present the change that Buddhism brought to him as a miracle. In an attempt to dramatise this change, such legends exaggerate Ashoka's past wickedness and his piousness after the conversion. Kalinga war and conversion to Buddhism Ashoka's inscriptions mention that he conquered the Kalinga region during his 8th regnal year: the destruction caused during the war made him repent violence, and in the subsequent years, he was drawn towards Buddhism. Edict 13 of the Edicts of Ashoka Rock Inscriptions expresses the great remorse the king felt after observing the destruction of Kalinga: On the other hand, the Sri Lankan tradition suggests that Ashoka was already a devoted Buddhist by his 8th regnal year, converted to Buddhism during his 4th regnal year, and constructed 84,000 viharas during his 5th–7th regnal years. The Buddhist legends make no mention of the Kalinga campaign. Based on Sri Lankan tradition, some scholars, such as Eggermont, believe Ashoka converted to Buddhism before the Kalinga war. Critics of this theory argue that if Ashoka were already a Buddhist, he would not have waged the violent Kalinga War. Eggermont explains this anomaly by theorising that Ashoka had his own interpretation of the "Middle Way". Some earlier writers believed that Ashoka dramatically converted to Buddhism after seeing the suffering caused by the war since his Major Rock Edict 13 states that he became closer to the dhamma after the annexation of Kalinga. However, even if Ashoka converted to Buddhism after the war, epigraphic evidence suggests that his conversion was a gradual process rather than a dramatic event. For example, in a Minor Rock Edict issued during his 13th regnal year (five years after the Kalinga campaign), he states that he had been an upasaka (lay Buddhist) for more than two and a half years, but did not make much progress; in the past year, he was drawn closer to the sangha and became a more ardent follower. The Kalinga War According to Ashoka's Major Rock Edict 13, he conquered Kalinga 8 years after ascending to the throne. The edict states that during his conquest of Kalinga, 100,000 men and animals were killed in action; many times that number "perished"; and 150,000 men and animals were carried away from Kalinga as captives. Ashoka states that the repentance of these sufferings caused him to devote himself to the practice and propagation of dharma. He proclaims that he now considered the slaughter, death and deportation caused during the conquest of a country painful and deplorable; and that he considered the suffering caused to the religious people and householders even more deplorable. This edict has been inscribed at several places, including Erragudi, Girnar, Kalsi, Maneshra, Shahbazgarhi and Kandahar. However, it is omitted in Ashoka's inscriptions found in the Kalinga region, where the Rock Edicts 13 and 14 have been replaced by two separate edicts that make no mention of Ashoka's remorse. It is possible that Ashoka did not consider it politically appropriate to make such a confession to the people of Kalinga. Another possibility is the Kalinga war and its consequences, as described in Ashoka's rock edicts, are "more imaginary than real". This description is meant to impress those far removed from the scene, thus unable to verify its accuracy. Ancient sources do not mention any other military activity of Ashoka, although the 16th-century writer Taranatha claims that Ashoka conquered the entire Jambudvipa. First contact with Buddhism Different sources give different accounts of Ashoka's conversion to Buddhism. According to Sri Lankan tradition, Ashoka's father, Bindusara, was a devotee of Brahmanism, and his mother Dharma was a devotee of Ajivikas. The Samantapasadika states that Ashoka followed non-Buddhist sects during the first three years of his reign. The Sri Lankan texts add that Ashoka was not happy with the behaviour of the Brahmins who received his alms daily. His courtiers produced some Ajivika and Nigantha teachers before him, but these also failed to impress him. The Dipavamsa states that Ashoka invited several non-Buddhist religious leaders to his palace and bestowed great gifts upon them in the hope that they would answer a question posed by the king. The text does not state what the question was but mentions that none of the invitees were able to answer it. One day, Ashoka saw a young Buddhist monk called Nigrodha (or Nyagrodha), who was looking for alms on a road in Pataliputra. He was the king's nephew, although the king was not aware of this: he was a posthumous son of Ashoka's eldest brother Sumana, whom Ashoka had killed during the conflict for the throne. Ashoka was impressed by Nigrodha's tranquil and fearless appearance, and asked him to teach him his faith. In response, Nigrodha offered him a sermon on appamada (earnestness). Impressed by the sermon, Ashoka offered Nigrodha 400,000 silver coins and 8 daily portions of rice. The king became a Buddhist upasaka, and started visiting the Kukkutarama shrine at Pataliputra. At the temple, he met the Buddhist monk Moggaliputta Tissa, and became more devoted to the Buddhist faith. The veracity of this story is not certain. This legend about Ashoka's search for a worthy teacher may be aimed at explaining why Ashoka did not adopt Jainism, another major contemporary faith that advocates non-violence and compassion. The legend suggests that Ashoka was not attracted to Buddhism because he was looking for such a faith, rather, for a competent spiritual teacher. The Sri Lankan tradition adds that during his sixth regnal year, Ashoka's son Mahinda became a Buddhist monk, and his daughter became a Buddhist nun. A story in Divyavadana attributes Ashoka's conversion to the Buddhist monk Samudra, who was an ex-merchant from Shravasti. According to this account, Samudra was imprisoned in Ashoka's "Hell", but saved himself using his miraculous powers. When Ashoka heard about this, he visited the monk, and was further impressed by a series of miracles performed by the monk. He then became a Buddhist. A story in the Ashokavadana states that Samudra was a merchant's son, and was a 12-year-old boy when he met Ashoka; this account seems to be influenced by the Nigrodha story. The A-yu-wang-chuan states that a 7-year-old Buddhist converted Ashoka. Another story claims that the young boy ate 500 Brahmanas who were harassing Ashoka for being interested in Buddhism; these Brahmanas later miraculously turned into Buddhist bhikkus at the Kukkutarama monastery, which Ashoka visited. Several Buddhist establishments existed in various parts of India by the time of Ashoka's ascension. It is not clear which branch of the Buddhist sangha influenced him, but the one at his capital Pataliputra is a good candidate. Another good candidate is the one at Mahabodhi: the Major Rock Edict 8 records his visit to the Bodhi Tree – the place of Buddha's enlightenment at Mahabodhi – after his tenth regnal year, and the minor rock edict issued during his 13th regnal year suggests that he had become a Buddhist around the same time. Reign after Buddhist influence Construction of Stupas and Temples Both Mahavamsa and Ashokavadana state that Ashoka constructed 84,000 stupas or viharas. According to the Mahavamsa, this activity took place during his fifth–seventh regnal years. The Ashokavadana states that Ashoka collected seven out of the eight relics of Gautama Buddha, and had their portions kept in 84,000 boxes made of gold, silver, cat's eye, and crystal. He ordered the construction of 84,000 stupas throughout the earth, in towns that had a population of 100,000 or more. He told Elder Yashas, a monk at the Kukkutarama monastery, that he wanted these stupas to be completed on the same day. Yashas stated that he would signal the completion time by eclipsing the sun with his hand. When he did so, the 84,000 stupas were completed at once. The Mahavamsa states that Ashoka ordered construction of 84,000 viharas (monasteries) rather than the stupas to house the relics. Like Ashokavadana, the Mahavamsa describes Ashoka's collection of the relics, but does not mention this episode in the context of the construction activities. It states that Ashoka decided to construct the 84,000 viharas when Moggaliputta Tissa told him that there were 84,000 sections of the Buddha's Dhamma. Ashoka himself began the construction of the Ashokarama vihara, and ordered subordinate kings to build the other viharas. Ashokarama was completed by the miraculous power of Thera Indagutta, and the news about the completion of the 84,000 viharas arrived from various cities on the same day. The construction of following stupas and viharas is credited to Ashoka: Sanchi, Madhya Pradesh, India Dhamek Stupa, Sarnath, Uttar Pradesh, India Mahabodhi Temple, Bihar, India Barabar Caves, Bihar, India Nalanda Mahavihara (some portions like Sariputta Stupa), Bihar, India Taxila University (some portions like Dharmarajika Stupa and Kunala Stupa), Taxila, Pakistan Bhir Mound (reconstructed), Taxila, Pakistan Bharhut stupa, Madhya Pradesh, India Deorkothar Stupa, Madhya Pradesh, India Butkara Stupa, Swat, Pakistan Sannati Stupa, Karnataka, India Mir Rukun Stupa, Nawabshah, Pakistan Propagation of Dhamma Ashoka's rock edicts suggest that during his eighth–ninth regnal years, he made a pilgrimage to the Bodhi Tree, started propagating dhamma, and performed social welfare activities. The welfare activities included establishment of medical treatment facilities for humans and animals; plantation of medicinal herbs; and digging of wells and plantation of trees along the roads. These activities were conducted in the neighbouring kingdoms, including those of the Cholas, the Pandyas, the Satiyaputras, Tamraparni, the Greek kingdom of Antiyoka. The edicts also state that during his tenth–eleventh regnal years, Ashoka became closer to the Buddhist sangha, and went on a tour of the empire that lasted for at least 256 days. By his 12th regnal year, Ashoka had started inscribing edicts to propagate dhamma, having ordered his officers (rajjukas and pradesikas) to tour their jurisdictions every five years for inspection and for preaching dhamma. By the next year, he had set up the post of the dharma-mahamatra. During his 14th regnal year, he commissioned the enlargement of the stupa of Buddha Kanakamuni. Third Buddhist Council The Sri Lankan tradition presents a greater role for Ashoka in the Buddhist community. In this tradition, Ashoka starts feeding monks on a large scale. His lavish patronage to the state patronage leads to many fake monks joining the sangha. The true Buddhist monks refuse to co-operate with these fake monks, and therefore, no uposatha ceremony is held for seven years. The king attempts to eradicate the fake monks, but during this attempt, an over-zealous minister ends up killing some real monks. The king then invites the elder monk Moggaliputta-Tissa, to help him expel non-Buddhists from the monastery founded by him at Pataliputra. 60,000 monks (bhikkhus) convicted of being heretical are de-frocked in the ensuing process. The uposatha ceremony is then held, and Tissa subsequently organises the Third Buddhist council, during the 17th regnal year of Ashoka. Tissa compiles Kathavatthu, a text that reaffirms Theravadin orthodoxy on several points. The North Indian tradition makes no mention of these events, which has led to doubts about the historicity of the Third Buddhist council. Richard Gombrich argues that the non-corroboration of this story by inscriptional evidence cannot be used to dismiss it as completely unhistorical, as several of Ashoka's inscriptions may have been lost. Gombrich also argues that Asohka's inscriptions prove that he was interested in maintaining the "unanimity and purity" of the Sangha. For example, in his Minor Rock Edict 3, Ashoka recommends the members of the Sangha to study certain texts (most of which remain unidentified). Similarly, in an inscription found at Sanchi, Sarnath, and Kosam, Ashoka mandates that the dissident members of the sangha should be expelled, and expresses his desire to the Sangha remain united and flourish. The 8th century Buddhist pilgrim Yijing records another story about Ashoka's involvement in the Buddhist sangha. According to this story, the earlier king Bimbisara, who was a contemporary of the Gautama Buddha, once saw 18 fragments of a cloth and a stick in a dream. The Buddha interpreted the dream to mean that his philosophy would be divided into 18 schools after his death, and predicted that a king called Ashoka would unite these schools over a hundred years later. Buddhist missions In the Sri Lankan tradition, Moggaliputta-Tissa – who is patronised by Ashoka – sends out nine Buddhist missions to spread Buddhism in the "border areas" in . This tradition does not credit Ashoka directly with sending these missions. Each mission comprises five monks, and is headed by an elder. To Sri Lanka, he sent his own son Mahinda, accompanied by four other Theras – Itthiya, Uttiya, Sambala and Bhaddasala. Next, with Moggaliputta-Tissa's help, Ashoka sent Buddhist missionaries to distant regions such as Kashmir, Gandhara, Himalayas, the land of the Yonas (Greeks), Maharashtra, Suvannabhumi, and Sri Lanka. The Sri Lankan tradition dates these missions to Ashoka's 18th regnal year, naming the following missionaries: Mahinda to Sri Lanka Majjhantika to Kashmir and Gandhara Mahadeva to Mahisa-mandala (possibly modern Mysore region) Rakkhita to Vanavasa Dhammarakkhita the Greek to Aparantaka (western India) Maha-dhamma-rakkhita to Maharashtra Maharakkhita to the Greek country Majjhima to the Himalayas Soṇa and Uttara to Suvaṇṇabhūmi (possibly Lower Burma and Thailand) The tradition adds that during his 19th regnal year, Ashoka's daughter Sanghamitta went to Sri Lanka to establish an order of nuns, taking a sapling of the sacred Bodhi Tree with her. The North Indian tradition makes no mention of these events. Ashoka's own inscriptions also appear to omit any mention of these events, recording only one of his activities during this period: in his 19th regnal year, he donated the Khalatika Cave to ascetics to provide them a shelter during the rainy season. Ashoka's Pillar Edicts suggest that during the next year, he made pilgrimage to Lumbini – the place of Buddha's birth, and to the stupa of the Buddha Kanakamuni. The Rock Edict XIII states that Ashoka's won a "dhamma victory" by sending messengers to five kings and several other kingdoms. Whether these missions correspond to the Buddhist missions recorded in the Buddhist chronicles is debated. Indologist Etienne Lamotte argues that the "dhamma" missionaries mentioned in Ashoka's inscriptions were probably not Buddhist monks, as this "dhamma" was not same as "Buddhism". Moreover, the lists of destinations of the missions and the dates of the missions mentioned in the inscriptions do not tally the ones mentioned in the Buddhist legends. Other scholars, such as Erich Frauwallner and Richard Gombrich, believe that the missions mentioned in the Sri Lankan tradition are historical. According to these scholars, a part of this story is corroborated by archaeological evidence: the Vinaya Nidana mentions names of five monks, who are said to have gone to the Himalayan region; three of these names have been found inscribed on relic caskets found at Bhilsa (near Vidisha). These caskets have been dated to the early 2nd century BCE, and the inscription states that the monks are of the Himalayan school. The missions may have set out from Vidisha in central India, as the caskets were discovered there, and as Mahinda is said to have stayed there for a month before setting out for Sri Lanka. According to Gombrich, the mission may have included representatives of other religions, and thus, Lamotte's objection about "dhamma" is not valid. The Buddhist chroniclers may have decided not to mention these non-Buddhists, so as not to sideline Buddhism. Frauwallner and Gombrich also believe that Ashoka was directly responsible for the missions, since only a resourceful ruler could have sponsored such activities. The Sri Lankan chronicles, which belong to the Theravada school, exaggerate the role of the Theravadin monk Moggaliputta-Tissa in order to glorify their sect. Some historians argue that Buddhism became a major religion because of Ashoka's royal patronage. However, epigraphic evidence suggests that the spread of Buddhism in north-western India and Deccan region was less because of Ashoka's missions, and more because of merchants, traders, landowners and the artisan guilds who supported Buddhist establishments. Violence after conversion According to the Ashokavadana, Ashoka resorted to violence even after converting to Buddhism. For example: He slowly tortured Chandagirika to death in the "hell" prison. He ordered a massacre of 18,000 heretics for a misdeed of one. He launched a pogrom against the Jains, announcing a bounty on the head of any heretic; this resulted in the beheading of his own brother – Vitashoka. According to the Ashokavadana, a non-Buddhist in Pundravardhana drew a picture showing the Buddha bowing at the feet of the Nirgrantha leader Jnatiputra. The term nirgrantha ("free from bonds") was originally used for a pre-Jaina ascetic order, but later came to be used for Jaina monks. "Jnatiputra" is identified with Mahavira, 24th Tirthankara of Jainism. The legend states that on complaint from a Buddhist devotee, Ashoka issued an order to arrest the non-Buddhist artist, and subsequently, another order to kill all the Ajivikas in Pundravardhana. Around 18,000 followers of the Ajivika sect were executed as a result of this order. Sometime later, another Nirgrantha follower in Pataliputra drew a similar picture. Ashoka burnt him and his entire family alive in their house. He also announced an award of one dinara (gold coin) to anyone who brought him the head of a Nirgrantha heretic. According to Ashokavadana, as a result of this order, his own brother was mistaken for a heretic and killed by a cowherd. Ashoka realised his mistake, and withdrew the order. For several reasons, scholars say, these stories of persecutions of rival sects by Ashoka appear to be clear fabrications arising out of sectarian propaganda. Family Queens Various sources mention five consorts of Ashoka: Devi (or Vedisa-Mahadevi-Shakyakumari), Karuvaki, Asandhimitra (Pali: Asandhimitta), Padmavati, and Tishyarakshita (Pali: Tissarakkha). Karuvaki is the only queen of Ashoka known from his own inscriptions: she is mentioned in an edict inscribed on a pillar at Allahabad. The inscription names her as the mother of prince Tivara, and orders the royal officers (mahamattas) to record her religious and charitable donations. According to one theory, Tishyarakshita was the regnal name of Kaurvaki. According to the Mahavamsa, Ashoka's chief queen was Asandhimitta, who died four years before him. It states that she was born as Ashoka's queen because in a previous life, she directed a pratyekabuddha to a honey merchant (who was later reborn as Ashoka). Some later texts also state that she additionally gave the pratyekabuddha a piece of cloth made by her. These texts include the Dasavatthuppakarana, the so-called Cambodian or Extended Mahavamsa (possibly from 9th–10th centuries), and the Trai Bhumi Katha (15th century). These texts narrate another story: one day, Ashoka mocked Asandhamitta was enjoying a tasty piece of sugarcane without having earned it through her karma. Asandhamitta replied that all her enjoyments resulted from merit resulting from her own karma. Ashoka then challenged her to prove this by procuring 60,000 robes as an offering for monks. At night, the guardian gods informed her about her past gift to the pratyekabuddha, and next day, she was able to miraculously procure the 60,000 robes. An impressed Ashoka makes her his favourite queen, and even offers to make her a sovereign ruler. Asandhamitta refuses the offer, but still invokes the jealousy of Ashoka's 16,000 other women. Ashoka proves her superiority by having 16,000 identical cakes baked with his royal seal hidden in only one of them. Each wife is asked to choose a cake, and only Asandhamitta gets the one with the royal seal. The Trai Bhumi Katha claims that it was Asandhamitta who encouraged her husband to become a Buddhist, and to construct 84,000 stupas and 84,000 viharas. According to Mahavamsa, after Asandhamitta's death, Tissarakkha became the chief queen. The Ashokavadana does not mention Asandhamitta at all, but does mention Tissarakkha as Tishyarakshita. The Divyavadana mentions another queen called Padmavati, who was the mother of the crown-prince Kunala. As mentioned above, according to the Sri Lankan tradition, Ashoka fell in love with Devi (or Vidisha-Mahadevi), as a prince in central India. After Ashoka's ascension to the throne, Devi chose to remain at Vidisha than move to the royal capital Pataliputra. According to the Mahavmsa, Ashoka's chief queen was Asandhamitta, not Devi: the text does not talk of any connection between the two women, so it is unlikely that Asandhamitta was another name for Devi. The Sri Lankan tradition uses the word samvasa to describe the relationship between Ashoka and Devi, which modern scholars variously interpret as sexual relations outside marriage, or co-habitation as a married couple. Those who argue that Ashoka did not marry Devi argue that their theory is corroborated by the fact that Devi did not become Ashoka's chief queen in Pataliputra after his ascension. The Dipavamsa refers to two children of Ashoka and Devi – Mahinda and Sanghamitta. Sons Tivara, the son of Ashoka and Karuvaki, is the only of Ashoka's sons to be mentioned by name in the inscriptions. According to North Indian tradition, Ashoka had a son named Kunala. Kunala had a son named Samprati. The Sri Lankan tradition mentions a son called Mahinda, who was sent to Sri Lanka as a Buddhist missionary; this son is not mentioned at all in the North Indian tradition. The Chinese pilgrim Xuanzang states that Mahinda was Ashoka's younger brother (Vitashoka or Vigatashoka) rather than his illgetimate son. The Divyavadana mentions the crown-prince Kunala alias Dharmavivardhana, who was a son of queen Padmavati. According to Faxian, Dharmavivardhana was appointed as the governor of Gandhara. The Rajatarangini mentions Jalauka as a son of Ashoka. Daughters According to Sri Lankan tradition, Ashoka had a daughter named Sanghamitta, who became a Buddhist nun. A section of historians, such as Romila Thapar, doubt the historicity of Sanghamitta, based on the following points: The name "Sanghamitta", which literally means the friend of the Buddhist Order (sangha), is unusual, and the story of her going to Ceylon so that the Ceylonese queen could be ordained appears to be an exaggeration. The Mahavamsa states that she married Ashoka's nephew Agnibrahma, and the couple had a son named Sumana. The contemporary laws regarding exogamy would have forbidden such a marriage between first cousins. According to the Mahavamsa, she was 18 years old when she was ordained as a nun. The narrative suggests that she was married two years earlier, and that her husband as well as her child were ordained. It is unlikely that she would have been allowed to become a nun with such a young child. Another source mentions that Ashoka had a daughter named Charumati, who married a kshatriya named Devapala. Brothers According to the Ashokavadana, Ashoka had an elder half-brother named Susima. According to Sri Lankan tradition, this brother was Tissa, who initially lived a luxurious life, without worrying about the world. To teach him a lesson, Ashoka put him on the throne for a few days, then accused him of being an usurper, and sentenced him to die after seven days. During these seven days, Tissa realised that the Buddhist monks gave up pleasure because they were aware of the eventual death. He then left the palace, and became an arhat. The Theragatha commentary calls this brother Vitashoka. According to this legend, one day, Vitashoka saw a grey hair on his head, and realised that he had become old. He then retired to a monastery, and became an arhat. Faxian calls the younger brother Mahendra, and states that Ashoka shamed him for his immoral behaviour. The brother than retired to a dark cave, where he meditated, and became an arhat. Ashoka invited him to return to the family, but he preferred to live alone on a hill. So, Ashoka had a hill built for him within Pataliputra. The Ashoka-vadana states that Ashoka's brother was mistaken for a Nirgrantha, and killed during a massacre of the Nirgranthas ordered by Ashoka. Imperial extent The extent of the territory controlled by Ashoka's predecessors is not certain, but it is possible that the empire of his grandfather Chandragupta extended across northern India from the western coast (Arabian Sea) to the eastern coast (Bay of Bengal), covering nearly two-thirds of the Indian subcontinent. Bindusara and Ashoka seem to have extended the empire southwards. The distribution of Ashoka's inscriptions suggests that his empire included almost the entire Indian subcontinent, except its southernmost parts. The Rock Edicts 2 and 13 suggest that these southernmost parts were controlled by the Cholas, the Pandyas, the Keralaputras, and the Satiyaputras. In the north-west, Ashoka's kingdom extended up to Kandahar, to the east of the Seleucid Empire ruled by Antiochus II. The capital of Ashoka's empire was Pataliputra in the Magadha region. Religion and philosophy Relationship with Buddhism The Buddhist legends state that Ashoka converted to Buddhism, although this has been debated by a section of scholars. The Minor Rock Edict 1 leaves no doubt that Ashoka was a follower of Buddhism. In this edict, he calls himself an upasaka (a lay follower of Buddhism) and a sakya (i.e. Buddhist, after Gautama Buddha's title Shakya-Muni). This and several other edicts are evidence of his Buddhist affiliation: In his Minor Rock Edict 1, Ashoka adds that he did not make much progress for a year after becoming an upasaka, but then, he "went to" the Sangha, and made more progress. It is not certain what "going to" the Sangha means – the Buddhist tradition that he lived with monks may be an exaggeration, but it clearly means that Ashoka was drawn closer to Buddhism. In his Minor Rock Edict 3, he calls himself an upasaka, and records his faith in the Buddha and the Sangha. In the Major Rock Edict 8, he records his visit to Sambodhi (the sacred Bodhi Tree at Bodh Gaya), ten years after his coronation. In the Lumbini (Rumminidei) inscription, he records his visit to the Buddha's birthplace, and declares his reverence for the Buddha and the sangha. In the Nigalisagar inscription, he records his doubling in size of a stupa dedicated to a former Buddha, and his visit to the site for worship. Some of his inscriptions reflect his interest in maintaining the Buddhist sangha (see #Purification of sangha below). The Saru Maru inscription states that Ashoka dispatched the message while travelling to Upunita-vihara in Manema-desha. Although the identity of the destination is not certain, it was obviously a Buddhist monastery (vihara). Other religions A legend in the Buddhist text Vamsatthapakasini states that an Ajivika ascetic invited to interpret a dream of Ashoka's mother had predicted that he would patronise Buddhism and destroy 96 heretical sects. However, such assertions are directly contradicted by Ashoka's own inscriptions. Ashoka's edicts, such as the Rock Edicts 6, 7, and 12, emphasise tolerance of all sects. Similarly, in his Rock Edict 12, Ashoka honours people of all faiths. In his inscriptions, Ashoka dedicates caves to non-Buddhist ascetics, and repeatedly states that both Brahmins and shramanas deserved respect. He also tells people "not to denigrate other sects, but to inform themselves about them". In fact, there is no evidence that Buddhism was a state religion under Ashoka. None of Ashoka's extant edicts record his direct donations to the Buddhists. One inscription records donations by his queen Karuvaki, while the emperor is known to have donated the Barabar Caves to the Ajivikas. There are some indirect references to his donations to Buddhists. For example, the Nigalisagar Pillar inscription records his enlargement of the Konakamana stupa. Similarly, the Lumbini (Rumminidei) inscription states that he exempted the village of Buddha's birth from the land tax, and reduced the revenue tax to one-eighth. Ashoka appointed the dhamma-mahamatta officers, whose duties included the welfare of various religious sects, including the Buddhist sangha, Brahmins, Ajivikas, and Nirgranthas. The Rock Edicts 8 and 12, and the Pillar Edict 7, mandate donations to all religious sects. Ashoka's Minor Rock Edict 1 contains the phrase "amissā devā". According to one interpretation, the term "amissā" derives from the word "amṛṣa" ("false"), and thus, the phrase is a reference to Ashoka's belief in "true" and "false" gods. However, it is more likely that the term derives from the word "amiśra" ("not mingled"), and the phrase refers to celestial beings who did not mingle with humans. The inscription claims that the righteousness generated by adoption of dhamma by the humans attracted even the celestial gods who did not mingle with humans. Dharma Ashoka's various inscriptions suggest that he devoted himself to the propagation of "Dharma" (Pali: Dhamma), a term that refers to the teachings of Gautama Buddha in the Buddhist circles. However, Ashoka's own inscriptions do not mention Buddhist doctrines such as the Four Noble Truths or Nirvana. The word "Dharma" has various connotations in the Indian religions, and can be generally translated as "law, duty, or righteousness". In the Kandahar inscriptions of Ashoka, the word "Dharma" has been translated as eusebeia (Greek) and qsyt (Aramaic), which further suggests that his "Dharma" meant something more generic than Buddhism. The inscriptions suggest that for Ashoka, Dharma meant "a moral polity of active social concern, religious tolerance, ecological awareness, the observance of common ethical precepts, and the renunciation of war." For example: Abolition of the death penalty (Pillar Edict IV) Plantation of banyan trees and mango groves, and construction of resthouses and wells, every along the roads. (Pillar Edict 7). Restriction on killing of animals in the royal kitchen (Rock Edict 1); the number of animals killed was limited to two peacocks and a deer daily, and in future, even these animals were not to be killed. Provision of medical facilities for humans and animals (Rock Edict 2). Encouragement of obedience to parents, "generosity toward priests and ascetics, and frugality in spending" (Rock Edict 3). He "commissions officers to work for the welfare and happiness of the poor and aged" (Rock Edict 5) Promotion of "the welfare of all beings so as to pay off his debt to living creatures and to work for their happiness in this world and the next." (Rock Edict 6) Modern scholars have variously understood this dhamma as a Buddhist lay ethic, a set of politico-moral ideas, a "sort of universal religion", or as an Ashokan innovation. On the other hand, it has also been interpreted as an essentially political ideology that sought to knit together a vast and diverse empire. Ashoka instituted a new category of officers called the dhamma-mahamattas, who were tasked with the welfare of the aged, the infirm, the women and children, and various religious sects. They were also sent on diplomatic missions to the Hellenistic kingdoms of west Asia, in order to propagate the dhamma. Historically, the image of Ashoka in the global Buddhist circles was based on legends (such as those mentioned in the Ashokavadana) rather than his rock edicts. This was because the Brahmi script in which these edicts were written was forgotten soon and remained undeciphered until its study by James Prinsep in the 19th century. The writings of the Chinese Buddhist pilgrims such as Faxian and Xuanzang suggest that Ashoka's inscriptions mark the important sites associated with Gautama Buddha. These writers attribute Buddhism-related content to Ashoka's edicts, but this content does not match with the actual text of the inscriptions as determined by modern scholars after the decipherment of the Brahmi script. It is likely that the script was forgotten by the time of Faxian, who probably relied on local guides; these guides may have made up some Buddhism-related interpretations to gratify him, or may have themselves relied on faulty translations based on oral traditions. Xuanzang may have encountered a similar situation, or may have taken the supposed content of the inscriptions from Faxian's writings. This theory is corroborated by the fact that some Brahmin scholars are known to have similarly come up with a fanciful interpretation of Ashoka pillar inscriptions, when requested to decipher them by the 14th century Muslim king Firuz Shah Tughlaq. According to Shams-i Siraj's Tarikh-i Firoz Shahi, after the king had these pillar transported from Topra and Mirat to Delhi as war trophies, these Brahmins told him that the inscriptions prophesied that nobody would be able to remove the pillars except a king named Firuz. Moreover, by this time, there were local traditions that attributed the erection of these pillars to the legendary hero Bhima. According to scholars such as Richard Gombrich, Ashoka's dharma shows Buddhist influence. For example, the Kalinga Separate Edict I seems to be inspired by Buddha's Advice to Sigala and his other sermons. Animal welfare Ashoka's rock edicts declare that injuring living things is not good, and no animal should be slaughtered for sacrifice. However, he did not prohibit common cattle slaughter or beef eating. He imposed a ban on killing of "all four-footed creatures that are neither useful nor edible", and of specific animal species including several birds, certain types of fish and bulls among others. He also banned killing of female goats, sheep and pigs that were nursing their young; as well as their young up to the age of six months. He also banned killing of all fish and castration of animals during certain periods such as Chaturmasa and Uposatha. Ashoka also abolished the royal hunting of animals and restricted the slaying of animals for food in the royal residence. Because he banned hunting, created many veterinary clinics and eliminated meat eating on many holidays, the Mauryan Empire under Ashoka has been described as "one of the very few instances in world history of a government treating its animals as citizens who are as deserving of its protection as the human residents". Foreign relations It is well known that Ashoka sent dütas or emissaries to convey messages or letters, written or oral (rather both), to various people. The VIth Rock Edict about "oral orders" reveals this. It was later confirmed that it was not unusual to add oral messages to written ones, and the content of Ashoka's messages can be inferred likewise from the XIIIth Rock Edict: They were meant to spread his dhammavijaya, which he considered the highest victory and which he wished to propagate everywhere (including far beyond India). There is obvious and undeniable trace of cultural contact through the adoption of the Kharosthi script, and the idea of installing inscriptions might have travelled with this script, as Achaemenid influence is seen in some of the formulations used by Ashoka in his inscriptions. This indicates to us that Ashoka was indeed in contact with other cultures, and was an active part in mingling and spreading new cultural ideas beyond his own immediate walls. Hellenistic world In his rock edicts, Ashoka states that he had encouraged the transmission of Buddhism to the Hellenistic kingdoms to the west and that the Greeks in his dominion were converts to Buddhism and recipients of his envoys: It is possible, but not certain, that Ashoka received letters from Greek rulers and was acquainted with the Hellenistic royal orders in the same way as he perhaps knew of the inscriptions of the Achaemenid kings, given the presence of ambassadors of Hellenistic kings in India (as well as the dütas sent by Ashoka himself). Dionysius is reported to have been such a Greek ambassador at the court of Ashoka, sent by Ptolemy II Philadelphus, who himself is mentioned in the Edicts of Ashoka as a recipient of the Buddhist proselytism of Ashoka. Some Hellenistic philosophers, such as Hegesias of Cyrene, who probably lived under the rule of King Magas, one of the supposed recipients of Buddhist emissaries from Asoka, are sometimes thought to have been influenced by Buddhist teachings. The Greeks in India even seem to have played an active role in the propagation of Buddhism, as some of the emissaries of Ashoka, such as Dharmaraksita, are described in Pali sources as leading Greek (Yona) Buddhist monks, active in spreading Buddhism (the Mahavamsa, XII). Some Greeks (Yavana) may have played an administrative role in the territories ruled by Ashoka. The Girnar inscription of Rudradaman records that during the rule of Ashoka, a Yavana Governor was in charge in the area of Girnar, Gujarat, mentioning his role in the construction of a water reservoir. It is thought that Ashoka's palace at Patna was modelled after the Achaemenid palace of Persepolis. Legends about past lives Buddhist legends mention stories about Ashoka's past lives. According to a Mahavamsa story, Ashoka, Nigrodha and Devnampiya Tissa were brothers in a previous life. In that life, a pratyekabuddha was looking for honey to cure another, sick pratyekabuddha. A woman directed him to a honey shop owned by the three brothers. Ashoka generously donated honey to the pratyekabuddha, and wished to become the sovereign ruler of Jambudvipa for this act of merit. The woman wished to become his queen, and was reborn as Ashoka's wife Asandhamitta. Later Pali texts credit her with an additional act of merit: she gifted the pratyekabuddha a piece of cloth made by her. These texts include the Dasavatthuppakarana, the so-called Cambodian or Extended Mahavamsa (possibly from 9th–10th centuries), and the Trai Bhumi Katha (15th century). According to an Ashokavadana story, Ashoka was born as Jaya in a prominent family of Rajagriha. When he was a little boy, he gave the Gautama Buddha dirt imagining it to be food. The Buddha approved of the donation, and Jaya declared that he would become a king by this act of merit. The text also state that Jaya's companion Vijaya was reborn as Ashoka's prime-minister Radhagupta. In the later life, the Buddhist monk Upagupta tells Ashoka that his rough skin was caused by the impure gift of dirt in the previous life. Some later texts repeat this story, without mentioning the negative implications of gifting dirt; these texts include Kumaralata's Kalpana-manditika, Aryashura's Jataka-mala, and the Maha-karma-vibhaga. The Chinese writer Pao Ch'eng's Shih chia ju lai ying hua lu asserts that an insignificant act like gifting dirt could not have been meritorious enough to cause Ashoka's future greatness. Instead, the text claims that in another past life, Ashoka commissioned a large number of Buddha statues as a king, and this act of merit caused him to become a great emperor in the next life. The 14th century Pali-language fairy tale Dasavatthuppakarana (possibly from ) combines the stories about the merchant's gift of honey, and the boy's gift of dirt. It narrates a slightly different version of the Mahavamsa story, stating that it took place before the birth of the Gautama Buddha. It then states that the merchant was reborn as the boy who gifted dirt to the Buddha; however, in this case, the Buddha his attendant to Ānanda to create plaster from the dirt, which is used repair cracks in the monastery walls. Last years Tissarakkha as the queen Ashoka's last dated inscription - the Pillar Edict 4 is from his 26th regnal year. The only source of information about Ashoka's later years are the Buddhist legends. The Sri Lankan tradition states that Ashoka's queen Asandhamitta died during his 29th regnal year, and in his 32nd regnal year, his wife Tissarakkha was given the title of queen. Both Mahavamsa and Ashokavadana state that Ashoka extended favours and attention to the Bodhi Tree, and a jealous Tissarakkha mistook "Bodhi" to be a mistress of Ashoka. She then used black magic to make the tree wither. According to the Ashokavadana, she hired a sorceress to do the job, and when Ashoka explained that "Bodhi" was the name of a tree, she had the sorceress heal the tree. According to the Mahavamsa, she completely destroyed the tree, during Ashoka's 34th regnal year. The Ashokavadana states that Tissarakkha (called "Tishyarakshita" here) made sexual advances towards Ashoka's son Kunala, but Kunala rejected her. Subsequently, Ashoka granted Tissarakkha kingship for seven days, and during this period, she tortured and blinded Kunala. Ashoka then threatened to "tear out her eyes, rip open her body with sharp rakes, impale her alive on a spit, cut off her nose with a saw, cut out her tongue with a razor." Kunala regained his eyesight miraculously, and pleaded for mercy for the queen, but Ashoka had her executed anyway. Kshemendra's Avadana-kalpa-lata also narrates this legend, but seeks to improve Ashoka's image by stating that he forgave the queen after Kunala regained his eyesight. Death According to the Sri Lankan tradition, Ashoka died during his 37th regnal year, which suggests that he died around 232 BCE. According to the Ashokavadana, the emperor fell severely ill during his last days. He started using state funds to make donations to the Buddhist sangha, prompting his ministers to deny him access to the state treasury. Ashoka then started donating his personal possessions, but was similarly restricted from doing so. On his deathbed, his only possession was the half of a myrobalan fruit, which he offered to the sangha as his final donation. Such legends encourage generous donations to the sangha and highlight the role of the kingship in supporting the Buddhist faith. Legend states that during his cremation, his body burned for seven days and nights. Legacy In The Outline of History (1920), H. G. Wells wrote, "Amidst the tens of thousands of names of monarchs that crowd the columns of history, their majesties and graciousnesses and serenities and royal highnesses and the like, the name of Ashoka shines, and shines, almost alone, a star." Architecture Besides the various stupas attributed to Ashoka, the pillars erected by him survive at various places in the Indian subcontinent. Ashoka is often credited with the beginning of stone architecture in India, possibly following the introduction of stone-building techniques by the Greeks after Alexander the Great. Before Ashoka's time, buildings were probably built in non-permanent material, such as wood, bamboo or thatch. Ashoka may have rebuilt his palace in Pataliputra by replacing wooden material by stone, and may also have used the help of foreign craftmen. Ashoka also innovated by using the permanent qualities of stone for his written edicts, as well as his pillars with Buddhist symbolism. Symbols Ashokan capitals were highly realistic and used a characteristic polished finish, Mauryan polish, giving a shiny appearance to the stone surface. Lion Capital of Ashoka, the capital of one of the pillars erected by Ashoka features a carving of a spoked wheel, known as the Ashoka Chakra. This wheel represents the wheel of Dhamma set in motion by the Gautama Buddha, and appears on the flag of modern India. This capital also features sculptures of lions, which appear on the seal of India. Inscriptions The edicts of Ashoka are a collection of 33 inscriptions on the Pillars of Ashoka, as well as boulders and cave walls, issued during his reign. These inscriptions are dispersed throughout modern-day Pakistan and India, and represent the first tangible evidence of Buddhism. The edicts describe in detail the first wide expansion of Buddhism through the sponsorship of one of the most powerful kings of Indian history, offering more information about Ashoka's proselytism, moral precepts, religious precepts, and his notions of social and animal welfare. Before Ashoka, the royal communications appear to have been written on perishable materials such as palm leaves, birch barks, cotton cloth, and possibly wooden boards. While Ashoka's administration would have continued to use these materials, Ashoka also had his messages inscribed on rock edicts. Ashoka probably got the idea of putting up these inscriptions from the neighbouring Achaemenid empire. It is likely that Ashoka's messages were also inscribed on more perishable materials, such as wood, and sent to various parts of the empire. None of these records survive now. Scholars are still attempting to analyse both the expressed and implied political ideas of the Edicts (particularly in regard to imperial vision), and make inferences pertaining to how that vision was grappling with problems and political realities of a "virtually subcontinental, and culturally and economically highly variegated, 3rd century BCE Indian empire. Nonetheless, it remains clear that Ashoka's Inscriptions represent the earliest corpus of royal inscriptions in the Indian subcontinent, and therefore prove to be a very important innovation in royal practices." Most of Ashoka's inscriptions are written in a mixture of various Prakrit dialects, in the Brahmi script. Several of Ashoka's inscriptions appear to have been set up near towns, on important routes, and at places of religious significance. Many of the inscriptions have been discovered in hills, rock shelters, and places of local significance. Various theories have been put forward about why Ashoka or his officials chose such places, including that they were centres of megalithic cultures, were regarded as sacred spots in Ashoka's time, or that their physical grandeur may be symbolic of spiritual dominance. Ashoka's inscriptions have not been found at major cities of the Maurya empire, such as Pataliputra, Vidisha, Ujjayini, and Taxila. It is possible that many of these inscriptions are lost; the 7th century Chinese pilgrim Xuanzang refers to some of Ashoka's pillar edicts, which have not been discovered by modern researchers. It appears that Ashoka dispatched every message to his provincial governors, who in turn, relayed it to various officials in their territory. For example, the Minor Rock Edict 1 appears in several versions at multiple places: all the versions state that Ashoka issued the proclamation while on a tour, having spent 256 days on tour. The number 256 indicates that the message was dispatched simultaneously to various places. Three versions of a message, found at edicts in the neighbouring places in Karnataka (Brahmagiri, Siddapura, and Jatinga-Rameshwara), were sent from the southern province's capital Suvarnagiri to various places. All three versions contain the same message, preceded by an initial greeting from the arya-putra (presumably Ashoka's son and the provincial governor) and the mahamatras (officials) in Suvarnagiri. Coinage The caduceus appears as a symbol of the punch-marked coins of the Maurya Empire in India, in the 3rd–2nd century BCE. Numismatic research suggests that this symbol was the symbol of king Ashoka, his personal "Mudra". This symbol was not used on the pre-Mauryan punch-marked coins, but only on coins of the Maurya period, together with the three arched-hill symbol, the "peacock on the hill", the triskelis and the Taxila mark. Modern scholarship Rediscovery Ashoka had almost been forgotten, but in the 19th century James Prinsep contributed in the revelation of historical sources. After deciphering the Brahmi script, Prinsep had originally identified the "Priyadasi" of the inscriptions he found with the King of Ceylon Devanampiya Tissa. However, in 1837, George Turnour discovered an important Sri Lankan manuscript (Dipavamsa, or "Island Chronicle" ) associating Piyadasi with Ashoka: Since then, the association of "Devanampriya Priyadarsin" with Ashoka was confirmed through various inscriptions, and especially confirmed in the Minor Rock Edict inscription discovered in Maski, directly associating Ashoka with his regnal title Devanampriya ("Beloved-of-the-Gods"): Another important historian was British archaeologist John Hubert Marshall, who was director-General of the Archaeological Survey of India. His main interests were Sanchi and Sarnath, in addition to Harappa and Mohenjodaro. Sir Alexander Cunningham, a British archaeologist and army engineer, and often known as the father of the Archaeological Survey of India, unveiled heritage sites like the Bharhut Stupa, Sarnath, Sanchi, and the Mahabodhi Temple. Mortimer Wheeler, a British archaeologist, also exposed Ashokan historical sources, especially the Taxila. Perceptions and historiography The use of Buddhist sources in reconstructing the life of Ashoka has had a strong influence on perceptions of Ashoka, as well as the interpretations of his Edicts. Building on traditional accounts, early scholars regarded Ashoka as a primarily Buddhist monarch who underwent a conversion from the Vedic religion to Buddhism and was actively engaged in sponsoring and supporting the Buddhist monastic institution. Some scholars have tended to question this assessment. Romila Thappar writes about Ashoka that "We need to see him both as a statesman in the context of inheriting and sustaining an empire in a particular historical period, and as a person with a strong commitment to changing society through what might be called the propagation of social ethics." The only source of information not attributable to Buddhist sources are the Ashokan Edicts, and these do not explicitly state that Ashoka was a Buddhist. In his edicts, Ashoka expresses support for all the major religions of his time: Buddhism, Brahmanism, Jainism, and Ajivikaism, and his edicts addressed to the population at large (there are some addressed specifically to Buddhists; this is not the case for the other religions) generally focus on moral themes members of all the religions would accept. For example, Amartya Sen writes, "The Indian Emperor Ashoka in the third century BCE presented many political inscriptions in favor of tolerance and individual freedom, both as a part of state policy and in the relation of different people to each other". However, the edicts alone strongly indicate that he was a Buddhist. In one edict he belittles rituals, and he banned Vedic animal sacrifices; these strongly suggest that he at least did not look to the Vedic tradition for guidance. Furthermore, many edicts are expressed to Buddhists alone; in one, Ashoka declares himself to be an "upasaka", and in another he demonstrates a close familiarity with Buddhist texts. He erected rock pillars at Buddhist holy sites, but did not do so for the sites of other religions. He also used the word "dhamma" to refer to qualities of the heart that underlie moral action; this was an exclusively Buddhist use of the word. However, he used the word more in the spirit than as a strict code of conduct. Romila Thappar writes, "His dhamma did not derive from divine inspiration, even if its observance promised heaven. It was more in keeping with the ethic conditioned by the logic of given situations. His logic of Dhamma was intended to influence the conduct of categories of people, in relation to each other. Especially where they involved unequal relationships." Finally, he promotes ideals that correspond to the first three steps of the Buddha's graduated discourse. Much of the knowledge about Ashoka comes from the several inscriptions that he had carved on pillars and rocks throughout the empire. All his inscriptions present him as compassionate and loving. In the Kalinga rock edits, he addresses his people as his "children" and mentions that as a father he desires their good. Impact of pacifism After Ashoka's death, the Maurya dynasty declined rapidly. The various Puranas provide different details about Ashoka's successors, but all agree that they had relatively short reigns. The empire seems to have weakened, fragmented, and suffered an invasion from the Bactrian Greeks. Some historians, such as H. C. Raychaudhuri, have argued that Ashoka's pacifism undermined the "military backbone" of the Maurya empire. Others, such as Romila Thapar, have suggested that the extent and impact of his pacifism have been "grossly exaggerated". In art, film and literature Jaishankar Prasad composed Ashoka ki Chinta (Ashoka's Anxiety), a poem that portrays Ashoka's feelings during the war on Kalinga. Ashoka, a 1922 Indian silent historical film about the emperor produced by Madan Theatres. The Nine Unknown, a 1923 novel by Talbot Mundy about the "Nine Unknown Men", a fictional secret society founded by Ashoka. Samrat Ashok, a 1928 Indian silent film by Bhagwati Prasad Mishra. Ashok Kumar is a 1941 Indian Tamil-language film directed by Raja Chandrasekhar. The film stars V. Nagayya as Ashoka. Samrat Ashok is a 1947 Indian Hindi-language film by K.B. Lall. Uttar-Priyadarshi (The Final Beatitude), a verse-play written by poet Agyeya depicting his redemption, was adapted to stage in 1996 by theatre director, Ratan Thiyam and has since been performed in many parts of the world. In 1973, Amar Chitra Katha released a graphic novel based on the life of Ashoka. In Piers Anthony's series of space opera novels, the main character mentions Ashoka as a model for administrators to strive for. Samrat Ashok is a 1992 Indian Telugu-language film about the emperor by N. T. Rama Rao with Rao also playing the titular role. Aśoka is a 2001 epic Indian historical drama film directed and co-written by Santosh Sivan. The film stars Shah Rukh Khan as Ashoka. In 2002, Mason Jennings released the song "Emperor Ashoka" on his Living in the Moment EP. It is based on the life of Ashoka. In 2013, Christopher C. Doyle released his debut novel, The Mahabharata Secret, in which he wrote about Ashoka hiding a dangerous secret for the well-being of India. 2014's The Emperor's Riddles, a fiction mystery thriller novel by Satyarth Nayak, traces the evolution of Ashoka and his esoteric legend of the Nine Unknown Men. In 2015, Chakravartin Ashoka Samrat, a television serial by Ashok Banker, based on the life of Ashoka, began airing on Colors TV where Siddharth Nigam played the role of Ashoka. Bharatvarsh is an Indian television historical documentary series, hosted by actor-director Anupam Kher on Hindi news channel ABP News. The series stars Aham Sharma as Ashoka. Notes References Bibliography Further reading External links BBC Radio 4: Sunil Khilnani, Incarnations: Ashoka. BBC Radio 4: Melvyn Bragg with Richard Gombrich et al., In Our Time, Ashoka the Great. 3rd-century BC deaths 3rd-century BC Indian monarchs 3rd-century Buddhism Ancient history of Afghanistan Ancient history of Pakistan Buddhist pacifists Indian Buddhist monarchs Indian pacifists People from Patna

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https://en.wikipedia.org/wiki/American%20%28word%29

American (word)

The meaning of the word American in the English language varies according to the historical, geographical, and political context in which it is used. American is derived from America, a term originally denoting all of the Americas (also called the Western Hemisphere). In some expressions, it retains this Pan-American sense, but its usage has evolved over time and, for various historical reasons, the word came to denote people or things specifically from the United States. In modern English, American generally refers to persons or things related to the United States of America; among native English speakers this usage is almost universal, with any other use of the term requiring specification. However, some linguists in the past have argued that "American" should be widened to also include people or things from anywhere in the American continents. The word can be used as either an adjective or a noun (viz. a demonym). In adjectival use, it means "of or relating to the United States"; for example, "Elvis Presley was an American singer" or "the man prefers American English". In its noun form, the word generally means a resident or citizen of the U.S., but is also used for someone whose ethnic identity is simply "American". The noun is rarely used in English to refer to people not connected to the United States when intending a geographical meaning. When used with a grammatical qualifier, the adjective American can mean "of or relating to the Americas", as in Latin American or Indigenous American. Less frequently, the adjective can take this meaning without a qualifier, as in "American Spanish dialects and pronunciation differ by country" or the names of the Organization of American States and the American Registry for Internet Numbers (ARIN). A third use of the term pertains specifically to the indigenous peoples of the Americas, for instance, "In the 16th century, many Americans died from imported diseases during the European conquest", though this usage is rare, as "indigenous", "First Nations" or "Amerindian" are considered less confusing and generally more appropriate. Compound constructions which indicate a minority ethnic group, such as "African-Americans" likewise refer exclusively to people in or from the United States of America, as does the prefix "Americo-". For instance, the Americo-Liberians and their language Merico derive their name from the fact that they are descended from African-American settlers, i.e. Blacks who were formerly enslaved in the United States of America. Other languages French, German, Italian, Japanese, Hebrew, Arabic, and Russian speakers may use cognates of American to refer to inhabitants of the Americas or to U.S. nationals. They generally have other terms specific to U.S. nationals, such as the German , French , Japanese , and Italian . These specific terms may be less common than the term American. In French, , or , from ("United States of America"), is a rarely used word that distinguishes U.S. things and persons from the adjective , which denotes persons and things from the United States, but may also refer to "the Americas". Likewise, German's use of and observe this cultural distinction, solely denoting U.S. things and people. Note that in normal parlance, the adjective "American" and its direct cognates are usually used if the context renders the nationality of the person clear. This differentiation is prevalent in German-speaking countries, as indicated by the style manual of the Neue Zürcher Zeitung (one of the leading German-language newspapers in Switzerland) which dismisses the term as both 'unnecessary' and 'artificial' and recommends replacing it with amerikanisch. The respective guidelines of the foreign ministries of Austria, Germany and Switzerland all prescribe Amerikaner and amerikanisch in reference to the United States for official usage, making no mention of or . Portuguese has , denoting both a person or thing from the Americas and a U.S. national. For referring specifically to a U.S. national and things, some words used are (also spelled , "United States person"), from , and ("Yankee")—both usages exist in Brazil, but are uncommon in Portugal—but the term most often used, and the only one in Portugal, is , even though it could, as with its Spanish equivalent, apply to Canadians and Mexicans as well. In Spanish, denotes geographic and cultural origin in the New World, as well as (infrequently) a U.S. citizen; the more common term is ("United States person"), which derives from ("United States of America"). The Spanish term ("North American") is frequently used to refer things and persons from the United States, but this term can also denote people and things from Canada and Mexico. Among Spanish-speakers, North America generally doesn't include Central America or the Caribbean. In other languages, however, there is no possibility for confusion. For example, the Chinese word for "U.S. national" is () is derived from a word for the United States, , where is an abbreviation for Yàměilìjiā ("America") and is "country". The name for the American continents is , from plus ("continent"). Thus, a is an American in the continent sense, and a is an American in the U.S. sense. Conversely, in Czech, there is no possibility for disambiguation. Američan (m.) and američanka (f.) can refer to persons from the United States or from the continents of the Americas, and there is no specific word capable of distinguishing the two meanings. For this reason, the latter meaning is very rarely used, and word is used almost exclusively to refer to persons from the United States. The usage is exactly parallel to the English word. Korean and Vietnamese also use unambiguous terms, with Korean having () for the country versus () for the continents, and Vietnamese having for the country versus for the continents. Japanese has such terms as well ( [ versus []), but they are found more in newspaper headlines than in speech, where predominates. In Swahili, means specifically the United States, and is a U.S. national, whereas the international form refers to the continents, and would be an inhabitant thereof. Likewise, the Esperanto word refers to the continents. For the country there is the term . Thus, a citizen of the United States is an , whereas an is an inhabitant of the Americas. History The name America was coined by Martin Waldseemüller from Americus Vespucius, the Latinized version of the name of Amerigo Vespucci (1454–1512), the Italian explorer who mapped South America's east coast and the Caribbean Sea in the early 16th century. Later, Vespucci's published letters were the basis of Waldseemüller's 1507 map, which is the first usage of America. The adjective American subsequently denoted the New World. In the 16th century, European usage of American denoted the native inhabitants of the New World. The earliest recorded use of this term in English is in Thomas Hacket's 1568 translation of André Thévet's book France Antarctique; Thévet himself had referred to the natives as Ameriques. In the following century, the term was extended to European settlers and their descendants in the Americas. The earliest recorded use of "English-American" dates to 1648, in Thomas Gage's The English-American his travail by sea and land: or, a new survey of the West India's. In English, American was used especially for people in British America. Samuel Johnson, the leading English lexicographer, wrote in 1775, before the United States declared independence: "That the Americans are able to bear taxation is indubitable." The Declaration of Independence of July 1776 refers to "[the] unanimous Declaration of the thirteen United States of America" adopted by the "Representatives of the United States of America" on July 4, 1776. The official name of the country was reaffirmed on November 15, 1777, when the Second Continental Congress adopted the Articles of Confederation, the first of which says, "The Stile of this Confederacy shall be 'The United States of America'". The Articles further state: Thomas Jefferson, newly elected president in May 1801 wrote, "I am sure the measures I mean to pursue are such as would in their nature be approved by every American who can emerge from preconceived prejudices; as for those who cannot, we must take care of them as of the sick in our hospitals. The medicine of time and fact may cure some of them." In The Federalist Papers (1787–88), Alexander Hamilton and James Madison used the adjective American with two different meanings: one political and one geographic; "the American republic" in Federalist No. 51 and in Federalist No. 70, and, in Federalist No. 24, Hamilton used American to denote the lands beyond the U.S.'s political borders. Early official U.S. documents show inconsistent usage; the 1778 Treaty of Alliance with France used "the United States of North America" in the first sentence, then "the said United States" afterwards; "the United States of America" and "the United States of North America" derive from "the United Colonies of America" and "the United Colonies of North America". The Treaty of Peace and Amity of September 5, 1795, between the United States and the Barbary States contains the usages "the United States of North America", "citizens of the United States", and "American Citizens". U.S. President George Washington, in his 1796 Farewell Address, declaimed that "The name of American, which belongs to you in your national capacity, must always exalt the just pride of patriotism more than any appellation." Political scientist Virginia L. Arbery notes that, in his Farewell Address: "...Washington invites his fellow citizens to view themselves now as Americans who, out of their love for the truth of liberty, have replaced their maiden names (Virginians, South Carolinians, New Yorkers, etc.) with that of “American”. Get rid of, he urges, “any appellation derived from local discriminations.” By defining himself as an American rather than as a Virginian, Washington set the national standard for all citizens. "Over and over, Washington said that America must be something set apart. As he put it to Patrick Henry, 'In a word, I want an American character, that the powers of Europe may be convinced we act for ourselves and not for others.'" As the historian Garry Wills has noted: "This was a theme dear to Washington. He wrote to Timothy Pickering that the nation 'must never forget that we are Americans; the remembrance of which will convince us we ought not to be French or English'." Washington's countrymen subsequently embraced his exhortation with notable enthusiasm. This semantic divergence among North American anglophones, however, remained largely unknown in the Spanish-American colonies. In 1801, the document titled Letter to American Spaniards—published in French (1799), in Spanish (1801), and in English (1808)—might have influenced Venezuela's Act of Independence and its 1811 constitution. The Latter-day Saints' Articles of Faith refer to the American continents as where they are to build Zion. Common short forms and abbreviations are the United States, the U.S., the U.S.A., and America; colloquial versions include the U.S. of A. and the States. The term Columbia (from the Columbus surname) was a popular name for the U.S. and for the entire geographic Americas; its usage is present today in the District of Columbia's name. Moreover, the womanly personification of Columbia appears in some official documents, including editions of the U.S. dollar. Usage at the United Nations Use of the term American for U.S. nationals is common at the United Nations, and financial markets in the United States are referred to as "American financial markets". American Samoa, an unincorporated territory of the United States, is a recognized territorial name at the United Nations. Cultural views Spain and Hispanic America The use of American as a national demonym for U.S. nationals is challenged, primarily by Hispanic Americans. Spanish speakers in Spain and Latin America use the term to refer to people and things from the United States (from ), while refers to the continents as a whole. The term is also accepted in many parts of Latin America to refer to a person or something from the United States; however, this term may be ambiguous in certain parts. Up to and including the 1992 edition, the , published by the Real Academia Española, did not include the United States definition in the entry for ; this was added in the 2001 edition. The Real Academia Española advised against using exclusively for U.S. nationals: Canada Modern Canadians typically refer to people from the United States as Americans, though they seldom refer to the United States as America; they use the terms the United States, the U.S., or (informally) the States instead. Because of anti-American sentiment or simply national pride, Canadians never apply the term American to themselves. Not being an "American" is a part of Canadian identity, with many Canadians resenting being referred to as Americans or mistaken for U.S. citizens. This is often due to others' inability, particularly overseas, to distinguish Canadians from Americans, by their accent or other cultural attributes. Some Canadians have protested the use of American as a national demonym. People of U.S. ethnic origin in Canada are categorized as "Other North American origins" by Statistics Canada for purposes of census counts. Portugal and Brazil Generally, denotes "U.S. citizen" in Portugal. Usage of to exclusively denote people and things of the U.S. is discouraged by the Lisbon Academy of Sciences, because the specific word (also ) clearly denotes a person from the United States. The term currently used by the Portuguese press is . In Brazil, the term is used to address both that which pertains to the Americas and that which pertains to the U.S.; the particular meaning is deduced from context. Alternatively, the term ("North American") is also used in more informal contexts, while (of the U.S.) is the preferred form in academia. Use of the three terms is common in schools, government, and media. The term is used exclusively for the whole continent, and the U.S. is called ("United States") or ("United States of America"), often abbreviated . In other contexts "American" in the 1994 Associated Press Stylebook was defined as, "An acceptable description for a resident of the United States. It also may be applied to any resident or citizen of nations in North or South America." Elsewhere, the AP Stylebook indicates that "United States" must "be spelled out when used as a noun. Use U.S. (no space) only as an adjective." The entry for "America" in The New York Times Manual of Style and Usage from 1999 reads: Media releases from the Pope and Holy See frequently use "America" to refer to the United States, and "American" to denote something or someone from the United States. International law At least one international law uses U.S. citizen in defining a citizen of the United States rather than American citizen; for example, the English version of the North American Free Trade Agreement includes: Many international treaties use the terms American and American citizen: 1796 – The treaty between the United States and the Dey of the Regency of Algiers on March 7, 1796, protected "American citizens". 1806 – The Louisiana Purchase Treaty between France and United States referred to "American citizens". 1825 – The treaty between the United States and the Cheyenne tribe refers to "American citizen"s. 1848 – The Treaty of Guadalupe Hidalgo between Mexico and the U.S. uses "American Government" to refer to the United States, and "American tribunals" to refer to U.S. courts. 1858 – The Treaty of Amity and Commerce between the United States and Japan protected "American citizens" and also used "American" in other contexts. 1898 – The Treaty of Paris ending the Spanish–American War, known in Spanish as the ("Spain–United States War") uses "American" in reference to United States troops. 1966 – The United States–Thailand Treaty of Amity protects "Americans" and "American corporations". U.S. commercial regulation Products that are labeled, advertised, and marketed in the U.S. as "Made in the USA" must be, as set by the Federal Trade Commission (FTC), "all or virtually all made in the U.S." The FTC, to prevent deception of customers and unfair competition, considers an unqualified claim of "American Made" to expressly claim exclusive manufacture in the U.S: "The FTC Act gives the Commission the power to bring law enforcement actions against false or misleading claims that a product is of U.S. origin." Alternatives There are a number of alternatives to the demonym American as a citizen of the United States that do not simultaneously mean any inhabitant of the Americas. One uncommon alternative is Usonian, which usually describes a certain style of residential architecture designed by Frank Lloyd Wright. Other alternatives have also surfaced, but most have fallen into disuse and obscurity. Merriam-Webster's Dictionary of English Usage says: Nevertheless, no alternative to American is common. See also Americas (terminology) Hyphenated Americans Names of the United States Naming of the Americas Totum pro parte Notes References Works cited External links American culture English words Geographical naming disputes Definitions

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

Ada (programming language)

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

1247

https://en.wikipedia.org/wiki/Alfonso%20Cuar%C3%B3n

Alfonso Cuarón

Alfonso Cuarón Orozco ( , ; born 28 November 1961) is a Mexican filmmaker. He is known for directing films in a variety of genres, including the family drama A Little Princess (1995), the romantic drama Great Expectations (1998), the coming of age road film Y tu mamá también (2001), the fantasy film Harry Potter and the Prisoner of Azkaban (2004), science fiction films such as Children of Men (2006) and Gravity (2013) and the semi-autobiographical drama Roma (2018); he directed the 2009 short I Am Autism. Cuarón has received 11 Academy Award nominations, winning four: Best Director for Gravity and Roma, Best Film Editing for Gravity, and Best Cinematography for Roma. He is the first Mexican filmmaker to win the Best Director award, and one of the two persons (alongside Kenneth Branagh) to have been nominated for Academy Awards in seven different categories. Early life Cuarón was born in Mexico City, the son of Alfredo Cuarón, a doctor specializing in nuclear medicine, and Cristina Orozco, a pharmaceutical biochemist. He has two brothers; Carlos, also a filmmaker, and Alfredo, a conservation biologist. Cuarón studied philosophy at the National Autonomous University of Mexico and filmmaking at the Centro Universitario de Estudios Cinematográficos, a school within the same university. There he met the director Carlos Marcovich and cinematographer Emmanuel Lubezki, and they made what would be his first short film, Vengeance Is Mine. Career 1990s: Early career Cuarón began working on television in Mexico, first as a technician and then as a director. His television work led to assignments as an assistant director for several film productions including La Gran Fiesta, Gaby: A True Story and Romero, and in 1991 he landed his first big-screen directorial assignment. In 1991, Cuarón directed Sólo con tu pareja, a sex comedy about a womanizing businessman (played by Daniel Giménez Cacho) who, after having sex with an attractive nurse, is fooled into believing he's contracted AIDS. In addition to writing, producing and directing, Cuarón co-edited the film with Luis Patlán. The film, which also starred cabaret singer Astrid Hadad and model/actress Claudia Ramírez (with whom Cuarón was linked between 1989 and 1993) was a big hit in Mexico. After this success, director Sydney Pollack hired Cuarón to direct an episode of Fallen Angels, a series of neo-noir stories produced for the Showtime premium cable network in 1993; other directors who worked on the series included Steven Soderbergh, Jonathan Kaplan, Peter Bogdanovich, and Tom Hanks. In 1995, Cuarón released his first feature film produced in the United States, A Little Princess, an adaptation of Frances Hodgson Burnett's classic novel. Cuarón's next feature was also a literary adaptation, a modernized version of Charles Dickens's Great Expectations starring Ethan Hawke, Gwyneth Paltrow, and Robert De Niro. 2000s: International success In 2001, Cuarón found himself returning to Mexico with a Spanish-speaking cast to film Y tu mamá también, starring Gael García Bernal, Diego Luna and Maribel Verdú. It was a provocative and controversial road comedy about two sexually obsessed teenagers who take an extended road trip with an attractive married woman who is much older than them. The film's open portrayal of sexuality and frequent rude humor, as well as the politically and socially relevant asides, made the film an international hit and a major success with critics. Cuarón shared an Academy Award nomination for Best Original Screenplay with co-writer and brother Carlos Cuarón. In 2004, Cuarón directed the third film in the successful Harry Potter series, Harry Potter and the Prisoner of Azkaban. Cuarón faced criticism at the time from some Harry Potter fans for his approach to the film, notably its tendency to take more creative liberties with the source material than its predecessors. However, author J. K. Rowling, who had seen and loved Cuarón's film Y tu mamá también, said that it was her personal favorite from the series so far. Critically, the film was also better received than the first two installments, with some critics remarking its new tone and for being the first Harry Potter film to truly capture the essence of the novels. It has been subsequently rated by audience polls and critics as the best of the movie franchise series. In 2006, Cuarón's feature Children of Men, an adaptation of the P. D. James novel starring Clive Owen, Julianne Moore, and Michael Caine, received wide critical acclaim including three Academy Award nominations. Cuarón himself received two nominations for his work on the film, in Best Film Editing (with Alex Rodríguez) and Best Adapted Screenplay (with several collaborators). He created the production and distribution company Esperanto Filmoj ("Esperanto Films", named because of his support for the international language Esperanto), which has credits in the films Duck Season, Pan's Labyrinth, and Gravity. Cuarón also directed the controversial public service announcement I Am Autism for Autism Speaks that was criticized by disability rights groups for its negative portrayal of autism. 2010s: Awards success In 2010, Cuarón began to develop the film Gravity, a drama set in space. He was joined by producer David Heyman, with whom Cuarón worked on Harry Potter and the Prisoner of Azkaban. Starring Sandra Bullock and George Clooney, the film opened the 70th Venice International Film Festival in August. The film was then released in America in October 2013. The film became a financial success, earning 723.2 million at the box office against a budget of 130 million. The film also received many awards nominations. For the film, he received the Golden Globe Award in the category of Best Director. The film received ten Academy Award nominations, including Best Picture and Best Director. Cuarón won for Best Directing, becoming the first Latin American to win the award, while he and Mark Sanger received the award for Best Film Editing. In 2013, Cuarón created Believe, a science fiction/fantasy/adventure series that was broadcast as part of the 2013–14 United States network television schedule on NBC as a mid-season entry. The series was created by Cuarón for Bad Robot Productions and Warner Bros. Television. In 2014, Time placed him in its list of "100 Most Influential People in the World" – Pioneers. In May 2015, Cuarón was announced as the president of the jury for the 72nd Venice International Film Festival. Production began in fall 2016 for Cuarón's eighth film, Roma, a tale of a housekeeper for a middle class Mexican family in 1970s Mexico City, based on the life of his family's longtime maid, Liboria Rodríguez. The project was produced by Cuarón, Gabriela Rodríguez and Nicolás Celis and starred Yalitza Aparicio and Marina de Tavira both of whom received Oscar nominations. The film debuted at the 75th Venice International Film Festival, where it won the Golden Lion, and was distributed to select Mexican and American theaters before its online release on Netflix. Roma was highly acclaimed upon release; among its accolades are two Golden Globes (Golden Globe Award for Best Foreign Language Film and Best Director for Cuarón) and three Academy Awards (Best Director, Best Foreign Language Film, and Best Cinematography for Cuarón) out of a leading ten nominations. In 2019, Cuaron signed an overall TV deal at Apple. His first series for Apple will be the psychological thriller Disclaimer, which is set to star Cate Blanchett and Kevin Kline. Style Cuarón often uses long takes and moving cameras to emulate a documentary film style. Personal life Cuarón is a vegetarian and has been living in London since 2000. Cuarón's first marriage was to Mariana Elizondo with whom he has a son, Jonás Cuarón, born in 1981. Jonás is also a film director, known for Year of the Nail and Desierto. Alfonso's second marriage, from 2001 to 2008 was to Italian actress and freelance journalist Annalisa Bugliani, with whom he has two children. He has publicly shown his fascination for the Esperanto language and his support for the Esperanto movement. He called his production company Esperanto Filmoj. Filmography Awards and nominations See also Esperanto Filmoj Cha Cha Cha Films Cinema of Mexico List of Academy Award records Notes References External links Alfonso Cuarón: A Life in Pictures, BAFTA webcast, 27 July 2007 1961 births Living people Best Cinematographer Academy Award winners Best Cinematography BAFTA Award winners Best Directing Academy Award winners Best Director AACTA International Award winners Best Director BAFTA Award winners Best Director Golden Globe winners Best Film Editing Academy Award winners Directors Guild of America Award winners Directors of Best Foreign Language Film Academy Award winners Directors of Golden Lion winners English-language film directors Fantasy film directors Filmmakers who won the Best Film BAFTA Award Filmmakers who won the Best Foreign Language Film BAFTA Award Film directors from Mexico City Hugo Award-winning writers Mexican cinematographers Mexican Esperantists Mexican expatriates in the United Kingdom Mexican film producers Mexican filmmakers Mexican people of Spanish descent Mexican screenwriters Mexican television directors Mexican television producers Mexican television writers National Autonomous University of Mexico alumni Nebula Award winners Science fiction film directors Spanish-language film directors Writers from Mexico City

1252

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

Arianism

Arianism (, ) is a Christological doctrine first attributed to Arius (), a Christian presbyter from Alexandria, Egypt. Arian theology holds that Jesus Christ is the Son of God, who was begotten by God the Father with the difference that the Son of God did not always exist but was begotten/made before "time" by God the Father, therefore Jesus was not coeternal with God the Father, and the difference that Arius believed the Son to be "God" only in name. Arius' trinitarian theology, later given an extreme form by Aetius and his disciple Eunomius and called anomoean ("dissimilar"), asserts a total dissimilarity between the Son and the Father. Arianism holds that the Son is distinct from the Father and therefore subordinate to him. The term Arian is derived from the name Arius; it was not what the followers of Arius' teachings called themselves, but rather a term used by outsiders. The nature of Arius's teachings and his supporters were opposed to the theological doctrines held by Homoousian Christians, regarding the nature of the Trinity and the nature of Christ. There was a controversy between two interpretations of Jesus's divinity (Homoousianism and Arianism) based upon the theological orthodoxy of the time, one trinitarian and the other also a derivative of trinitarian orthodoxy, and both of them attempted to solve its respective theological dilemmas. Homoousianism was formally affirmed by the first two ecumenical councils; since then, Arianism has always been condemned as "the heresy or sect of Arius". As such, all mainstream branches of Christianity now consider Arianism to be heterodox and heretical. Trinitarian (Homoousian) doctrines were vigorously upheld by Patriarch Athanasius of Alexandria, who insisted that Jesus (God the Son) was "same in being" or "same in essence" with God the Father. Arius stated: "If the Father begat the Son, then he who was begotten had a beginning in existence, and from this it follows there was a time when the Son was not." The ecumenical First Council of Nicaea of 325, convened by Emperor Constantine to ensure church unity, declared Arianism to be a heresy. According to Everett Ferguson, "The great majority of Christians had no clear views about the nature of the Trinity and they did not understand what was at stake in the issues that surrounded it." Arianism is also used to refer to other nontrinitarian theological systems of the 4th century, which regarded Jesus Christ—the Son of God, the Logos—as either a begotten creature of a similar or different substance to that of the Father, but not identical (as Homoiousian and Anomoeanism) or as neither uncreated nor created in the sense other beings are created (as in semi-Arianism). Origin Controversy over Arianism arose in the late 3rd century and persisted throughout most of the 4th century. It involved most church members—from simple believers, priests, and monks to bishops, emperors, and members of Rome's imperial family. Two Roman emperors, Constantius II and Valens, became Arians or Semi-Arians, as did prominent Gothic, Vandal, and Lombard warlords both before and after the fall of the Western Roman Empire. Such a deep controversy within the early Church during this period of its development could not have materialized without significant historical influences providing a basis for the Arian doctrines. Arius had been a pupil of Lucian of Antioch at Lucian's private academy in Antioch and inherited from him a modified form of the teachings of Paul of Samosata. Arius taught that God the Father and the Son of God did not always exist together eternally. Condemnation by the Council of Nicaea Emperor Constantine the Great summoned the First Council of Nicaea, which defined the dogmatic fundaments of Christianity; these definitions served to rebut the questions posed by Arians. All the bishops who were there were in agreement with the major theological points of the proto-orthodoxy, since at that time all other forms of Christianity "had by this time already been displaced, suppressed, reformed, or destroyed". Although the proto-orthodox won the previous disputes, due to the more accurate defining of orthodoxy, they were vanquished with their own weapons, ultimately being declared heretics, not because they would have fought against ideas regarded as theologically correct, but because their positions lacked the accuracy and refinement needed by the fusion of several contradictory theses accepted at the same time by later orthodox theologians. According to Bart Ehrman that is why the Trinity is a "paradoxical affirmation". Of the roughly 300 bishops in attendance at the Council of Nicaea, two bishops did not sign the Nicene Creed that condemned Arianism. Constantine the Great also ordered a penalty of death for those who refused to surrender the Arian writings: Ten years after the Council of Nicaea, Constantine the Great, who was himself later baptized by the Arian bishop Eusebius of Nicomedia in 337 AD, convened another gathering of church leaders at the regional First Synod of Tyre in 335 (attended by 310 bishops), to address various charges mounted against Athanasius by his detractors, such as "murder, illegal taxation, sorcery, and treason", following his refusal to readmit Arius into fellowship. Athanasius was exiled to Trier (in modern Germany) following his conviction at Tyre of conspiracy, and Arius was, effectively, exonerated. Athanasius eventually returned to Alexandria in 346, after the deaths of both Arius and Constantine. Though Arianism had spread, Athanasius and other Nicene Christian church leaders crusaded against Arian theology, and Arius was anathemised and condemned as a heretic once more at the ecumenical First Council of Constantinople of 381 (attended by 150 bishops). The Roman Emperors Constantius II (337–361) and Valens (364–378) were Arians or Semi-Arians, as was the first King of Italy, Odoacer (433?–493), and the Lombards were also Arians or Semi-Arians until the 7th century. The ruling elite of Visigothic Spain was Arian until 589. Many Goths adopted Arian beliefs upon their conversion to Christianity. The Vandals actively spread Arianism in North Africa. Beliefs Little of Arius's own work survives except in quotations selected for polemical purposes by his opponents, and there is no certainty about what theological and philosophical traditions formed his thought. Arianism taught that the Logos was a divine being begotten by God the Father before the creation of the world, made him a medium through whom everything else was created, and that the Son of God is subordinate to God the Father. A verse from Proverbs was also used: "The Lord created me at the beginning of his work." Therefore, the Son was rather the very first and the most perfect of God's creatures, and he was made "God" only by the Father's permission and power. Arians do not believe in the traditional doctrine of the Trinity. The letter of the Arian bishop Auxentius of Durostorum regarding the Arian missionary Ulfilas gives a picture of Arian beliefs. The Arian Ulfilas, who was ordained a bishop by the Arian bishop Eusebius of Nicomedia and returned to his people to work as a missionary, believed: God, the Father, ("unbegotten" God; Almighty God) always existing and who is the only true God. The Son of God, Jesus Christ, ("only-begotten God"), Mighty God; begotten before time began, , and who is Lord/Master. The Holy Spirit (the illuminating and sanctifying power, who is neither God the Father nor Lord/Master). 1 Corinthians 8:5–6 was cited as proof text: The creed of Arian Ulfilas (c. 311–383), which concludes the above-mentioned letter by Auxentius, distinguishes God the Father ("unbegotten"), who is the only true God, from Son of God ("only-begotten"), who is Lord/Master; and the Holy Spirit, the illuminating and sanctifying power, who is neither God the Father nor Lord/Master: A letter from Arius (c. 250–336) to the Arian Eusebius of Nicomedia (died 341) states the core beliefs of the Arians: Principally, the dispute between Trinitarianism and Arianism was about: has the Son always existed eternally with the Father or was the Son begotten at a certain time in the past? is the Son equal to the Father or subordinated to the Father? For Constantine, these were minor theological points that stood in the way of uniting the Empire, but for the theologians, it was of huge importance; for them, it was a matter of salvation. For the theologians of the 19th century it was already obvious that in fact Arius and Alexander/Athanasius did not have much to quarrel about, the difference between their views was very small, and that the end of the fight was by no means clear during their quarrel, both Arius and Athanasius suffering a great deal for their own views. Arius was the father of Homoiousianism and Alexander the father of Homoousianism, which was championed by Athanasius. For those theologians it was clear that Arius, Alexander and Athanasius were far from a true doctrine of Trinity, which developed later, historically speaking. Guido M. Berndt and Roland Steinacher state clearly that the beliefs of Arius were acceptable ("not especially unusual") to a huge number of orthodox clergy; this is the reason why such a major conflict was able to develop inside the Church, since Arius's theology received widespread sympathy (or at least was not considered to be overly controversial) and could not be dismissed outright as individual heresy. Homoian Arianism Arianism had several different variants, including Eunomianism and Homoian Arianism. Homoian Arianism is associated with Acacius and Eudoxius. Homoian Arianism avoided the use of the word ousia to describe the relation of Father to Son, and described these as "like" each other. Hanson lists twelve creeds that reflect the Homoian faith: The Second Sirmian Creed of 357 The Creed of Nice (Constantinople) 360 The creed put forward by Acacius at Seleucia, 359 The Rule of Faith of Ulfilas The creed uttered by Ulfilas on his deathbed, 383 The creed attributed to Eudoxius The Creed of Auxentius of Milan, 364 The Creed of Germinius professed in correspondence with Ursacius of Singidunum and Valens of Mursa Palladius's rule of faith Three credal statements found in fragments, subordinating the Son to the Father Struggles with orthodoxy First Council of Nicaea In 321, Arius was denounced by a synod at Alexandria for teaching a heterodox view of the relationship of Jesus to God the Father. Because Arius and his followers had great influence in the schools of Alexandria—counterparts to modern universities or seminaries—their theological views spread, especially in the eastern Mediterranean. By 325, the controversy had become significant enough that the Emperor Constantine called an assembly of bishops, the First Council of Nicaea, which condemned Arius's doctrine and formulated the original Nicene Creed of 325. The Nicene Creed's central term, used to describe the relationship between the Father and the Son, is Homoousios (), or Consubstantiality, meaning "of the same substance" or "of one being" (the Athanasian Creed is less often used but is a more overtly anti-Arian statement on the Trinity). The focus of the Council of Nicaea was the nature of the Son of God and his precise relationship to God the Father (see Paul of Samosata and the Synods of Antioch). Arius taught that Jesus Christ was divine/holy and was sent to earth for the salvation of mankind but that Jesus Christ was not equal to God the Father (infinite, primordial origin) in rank and that God the Father and the Son of God were not equal to the Holy Spirit. Under Arianism, Christ was instead not consubstantial with God the Father since both the Father and the Son under Arius were made of "like" essence or being (see homoiousia) but not of the same essence or being (see homoousia). In the Arian view, God the Father is a deity and is divine and the Son of God is not a deity but divine (I, the LORD, am Deity alone.) God the Father sent Jesus to earth for salvation of mankind. Ousia is essence or being, in Eastern Christianity, and is the aspect of God that is completely incomprehensible to mankind and human perception. It is all that subsists by itself and which has not its being in another, God the Father and God the Son and God the Holy Spirit all being uncreated. According to the teaching of Arius, the preexistent Logos and thus the incarnate Jesus Christ was a begotten being; only the Son was directly begotten by God the Father, before ages, but was of a distinct, though similar, essence or substance from the Creator. His opponents argued that this would make Jesus less than God and that this was heretical. Much of the distinction between the differing factions was over the phrasing that Christ expressed in the New Testament to express submission to God the Father. The theological term for this submission is kenosis. This ecumenical council declared that Jesus Christ was true God, co-eternal and consubstantial (i.e., of the same substance) with God the Father. Constantine is believed to have exiled those who refused to accept the Nicaean Creed—Arius himself, the deacon Euzoios, and the Libyan bishops Theonas of Marmarica and Secundus of Ptolemais—and also the bishops who signed the creed but refused to join in condemnation of Arius, Eusebius of Nicomedia and Theognis of Nicaea. The emperor also ordered all copies of the Thalia, the book in which Arius had expressed his teachings, to be burned. However, there is no evidence that his son and ultimate successor, Constantius II, who was a Semi-Arian Christian, was exiled. Although he was committed to maintaining what the Great Church had defined at Nicaea, Constantine was also bent on pacifying the situation and eventually became more lenient toward those condemned and exiled at the council. First, he allowed Eusebius of Nicomedia, who was a protégé of his sister, and Theognis to return once they had signed an ambiguous statement of faith. The two, and other friends of Arius, worked for Arius's rehabilitation. At the First Synod of Tyre in AD 335, they brought accusations against Athanasius, now bishop of Alexandria, the primary opponent of Arius. After this, Constantine had Athanasius banished since he considered him an impediment to reconciliation. In the same year, the Synod of Jerusalem under Constantine's direction readmitted Arius to communion in 336. Arius died on the way to this event in Constantinople. Some scholars suggest that Arius may have been poisoned by his opponents. Eusebius and Theognis remained in the Emperor's favor, and when Constantine, who had been a catechumen much of his adult life, accepted baptism on his deathbed, it was from Eusebius of Nicomedia. Aftermath of Nicaea The First Council of Nicaea did not end the controversy, as many bishops of the Eastern provinces disputed the homoousios, the central term of the Nicene Creed, as it had been used by Paul of Samosata, who had advocated a monarchianist Christology. Both the man and his teaching, including the term homoousios, had been condemned by the Synods of Antioch in 269. Hence, after Constantine's death in 337, open dispute resumed again. Constantine's son Constantius II, who had become emperor of the eastern part of the Roman Empire, actually encouraged the Arians and set out to reverse the Nicene Creed. His advisor in these affairs was Eusebius of Nicomedia, who had already at the Council of Nicaea been the head of the Arian party, who also was made the bishop of Constantinople. Constantius used his power to exile bishops adhering to the Nicene Creed, especially St Athanasius of Alexandria, who fled to Rome. In 355 Constantius became the sole Roman emperor and extended his pro-Arian policy toward the western provinces, frequently using force to push through his creed, even exiling Pope Liberius and installing Antipope Felix II. The Third Council of Sirmium in 357 was the high point of Arianism. The Seventh Arian Confession (Second Sirmium Confession) held that both homoousios (of one substance) and homoiousios (of similar substance) were unbiblical and that the Father is greater than the Son. (This confession was later known as the Blasphemy of Sirmium.) But since many persons are disturbed by questions concerning what is called in Latin substantia, but in Greek ousia, that is, to make it understood more exactly, as to 'coessential,' or what is called, 'like-in-essence,' there ought to be no mention of any of these at all, nor exposition of them in the Church, for this reason and for this consideration, that in divine Scripture nothing is written about them, and that they are above men's knowledge and above men's understanding; As debates raged in an attempt to come up with a new formula, three camps evolved among the opponents of the Nicene Creed. The first group mainly opposed the Nicene terminology and preferred the term homoiousios (alike in substance) to the Nicene homoousios, while they rejected Arius and his teaching and accepted the equality and co-eternality of the persons of the Trinity. Because of this centrist position, and despite their rejection of Arius, they were called "Semi-Arians" by their opponents. The second group also avoided invoking the name of Arius, but in large part followed Arius's teachings and, in another attempted compromise wording, described the Son as being like (homoios) the Father. A third group explicitly called upon Arius and described the Son as unlike (anhomoios) the Father. Constantius wavered in his support between the first and the second party, while harshly persecuting the third. Epiphanius of Salamis labeled the party of Basil of Ancyra in 358 "Semi-Arianism". This is considered unfair by Kelly who states that some members of the group were virtually orthodox from the start but disliked the adjective homoousios while others had moved in that direction after the out-and-out Arians had come into the open. The debates among these groups resulted in numerous synods, among them the Council of Serdica in 343, the Fourth Council of Sirmium in 358 and the double Council of Rimini and Seleucia in 359, and no fewer than fourteen further creed formulas between 340 and 360, leading the pagan observer Ammianus Marcellinus to comment sarcastically: "The highways were covered with galloping bishops." None of these attempts were acceptable to the defenders of Nicene orthodoxy; writing about the latter councils, Saint Jerome remarked that the world "awoke with a groan to find itself Arian." After Constantius's death in 361, his successor Julian, a devotee of Rome's pagan gods, declared that he would no longer attempt to favor one church faction over another, and allowed all exiled bishops to return; this resulted in further increasing dissension among Nicene Christians. The emperor Valens, however, revived Constantius's policy and supported the "Homoian" party, exiling bishops and often using force. During this persecution many bishops were exiled to the other ends of the Roman Empire (e.g., Saint Hilary of Poitiers to the eastern provinces). These contacts and the common plight subsequently led to a rapprochement between the western supporters of the Nicene Creed and the homoousios and the eastern Semi-Arians. Council of Constantinople It was not until the co-reigns of Gratian and Theodosius that Arianism was effectively wiped out among the ruling class and elite of the Eastern Empire. Valens died in the Battle of Adrianople in 378 and was succeeded by Theodosius I, who adhered to the Nicene Creed. This allowed for settling the dispute. Theodosius's wife St Flacilla was instrumental in his campaign to end Arianism. Two days after Theodosius arrived in Constantinople, 24 November 380, he expelled the Homoiousian bishop, Demophilus of Constantinople, and surrendered the churches of that city to Gregory of Nazianzus, the leader of the rather small Nicene community there, an act which provoked rioting. Theodosius had just been baptized, by bishop Acholius of Thessalonica, during a severe illness, as was common in the early Christian world. In February he and Gratian had published an edict that all their subjects should profess the faith of the bishops of Rome and Alexandria (i.e., the Nicene faith), or be handed over for punishment for not doing so. Although much of the church hierarchy in the East had opposed the Nicene Creed in the decades leading up to Theodosius's accession, he managed to achieve unity on the basis of the Nicene Creed. In 381, at the Second Ecumenical Council in Constantinople, a group of mainly Eastern bishops assembled and accepted the Nicene Creed of 381, which was supplemented in regard to the Holy Spirit, as well as some other changes: see Comparison of Nicene Creeds of 325 and 381. This is generally considered the end of the dispute about the Trinity and the end of Arianism among the Roman, non-Germanic peoples. Among medieval Germanic tribes During the time of Arianism's flowering in Constantinople, the Gothic convert and Arian bishop Ulfilas (later the subject of the letter of Auxentius cited above) was sent as a missionary to the Gothic tribes across the Danube, a mission favored for political reasons by the Emperor Constantius II. The Homoians in the Danubian provinces played a major role in the conversion of the Goths to Arianism. Ulfilas's translation of the Bible into Gothic language and his initial success in converting the Goths to Arianism was strengthened by later events; the conversion of Goths led to a widespread diffusion of Arianism among other Germanic tribes as well (Vandals, Langobards, Svevi, and Burgundians). When the Germanic peoples entered the provinces of the Western Roman Empire and began founding their own kingdoms there, most of them were Arian Christians. The conflict in the 4th century had seen Arian and Nicene factions struggling for control of Western Europe. In contrast, among the Arian German kingdoms established in the collapsing Western Empire in the 5th century were entirely separate Arian and Nicene Churches with parallel hierarchies, each serving different sets of believers. The Germanic elites were Arians, and the Romance majority population was Nicene. The Arian Germanic tribes were generally tolerant towards Nicene Christians and other religious minorities, including the Jews. However, the Vandals tried for several decades to force their Arian beliefs on their North African Nicene subjects, exiling Nicene clergy, dissolving monasteries, and exercising heavy pressure on non-conforming Nicene Christians. The apparent resurgence of Arianism after Nicaea was more an anti-Nicene reaction exploited by Arian sympathizers than a pro-Arian development. By the end of the 4th century it had surrendered its remaining ground to Trinitarianism. In Western Europe, Arianism, which had been taught by Ulfilas, the Arian missionary to the Germanic tribes, was dominant among the Goths, Langobards and Vandals. By the 8th century, it had ceased to be the tribes' mainstream belief as the tribal rulers gradually came to adopt Nicene orthodoxy. This trend began in 496 with Clovis I of the Franks, then Reccared I of the Visigoths in 587 and Aripert I of the Lombards in 653. The Franks and the Anglo-Saxons were unlike the other Germanic peoples in that they entered the Western Roman Empire as Pagans and were converted to Chalcedonian Christianity, led by their kings, Clovis I of the Franks, and Æthelberht of Kent and others in Britain (see also Christianity in Gaul and Christianisation of Anglo-Saxon England). The remaining tribes – the Vandals and the Ostrogoths – did not convert as a people nor did they maintain territorial cohesion. Having been militarily defeated by the armies of Emperor Justinian I, the remnants were dispersed to the fringes of the empire and became lost to history. The Vandalic War of 533–534 dispersed the defeated Vandals. Following their final defeat at the Battle of Mons Lactarius in 553, the Ostrogoths went back north and (re)settled in south Austria. From the 5th to the 7th century Much of south-eastern Europe and central Europe, including many of the Goths and Vandals respectively, had embraced Arianism (the Visigoths converted to Arian Christianity in 376 through their bishop Wulfila), which led to Arianism being a religious factor in various wars in the Roman Empire. In the west, organized Arianism survived in North Africa, in Hispania, and parts of Italy until it was finally suppressed in the 6th and 7th centuries. Visigothic Spain converted to Nicene Christianity through their king Reccared I at the Third Council of Toledo in 589. Grimoald, King of the Lombards (662–671), and his young son and successor Garibald (671), were the last Arian kings in Europe. From the 16th to the 19th century Following the Protestant Reformation from 1517, it did not take long for Arian and other nontrinitarian views to resurface. The first recorded English antitrinitarian was John Assheton, who was forced to recant before Thomas Cranmer in 1548. At the Anabaptist Council of Venice 1550, the early Italian instigators of the Radical Reformation committed to the views of Michael Servetus, who was burned alive by the orders of John Calvin in 1553, and these were promulgated by Giorgio Biandrata and others into Poland and Transylvania. The antitrinitarian wing of the Polish Reformation separated from the Calvinist ecclesia maior to form the ecclesia minor or Polish Brethren. These were commonly referred to as "Arians" due to their rejection of the Trinity, though in fact the Socinians, as they were later known, went further than Arius to the position of Photinus. The epithet "Arian" was also applied to the early Unitarians such as John Biddle, though in denial of the pre-existence of Christ they were again largely Socinians, not Arians. In 1683, when Anthony Ashley Cooper, 1st Earl of Shaftesbury, lay dying in Amsterdam—driven into exile by his outspoken opposition to King Charles II—he spoke to the minister Robert Ferguson, and professed himself an Arian. In the 18th century the "dominant trend" in Britain, particularly in Latitudinarianism, was towards Arianism, with which the names of Samuel Clarke, Benjamin Hoadly, William Whiston and Isaac Newton are associated. To quote the Encyclopædia Britannica article on Arianism: "In modern times some Unitarians are virtually Arians in that they are unwilling either to reduce Christ to a mere human being or to attribute to him a divine nature identical with that of the Father." A similar view was held by the ancient anti-Nicene Pneumatomachi (Greek: , "breath" or "spirit" and "fighters", combining as "fighters against the spirit"), so called because they opposed the deifying of the Nicene Holy Ghost. Although the Pneumatomachi's beliefs were somewhat reminiscent of Arianism, they were a distinct group. Today The teachings of the first two ecumenical councils—which entirely reject Arianism—are held by the Catholic Church, the Eastern Orthodox Church, the Oriental Orthodox Churches, the Assyrian Church of the East and most churches founded during the Reformation in the 16th century or influenced by it (Lutheran, Reformed/Presbyterian, and Anglican). Also, nearly all Protestant groups (such as Methodists, Baptists, Evangelicals and most Pentecostals) entirely reject the teachings associated with Arianism. Modern groups which currently appear to embrace some of the principles of Arianism include Unitarians and Jehovah's Witnesses. Although the origins of their beliefs are not necessarily attributed to the teachings of Arius, many of the core beliefs of Unitarians and Jehovah's Witnesses are very similar to them. The Church of Jesus Christ of Latter-day Saints The doctrine of the Church of Jesus Christ of Latter-day Saints (LDS Church) concerning the nature of the Godhead teaches a nontrinitarian theology. The church's first Article of Faith states: "We believe in God, the Eternal Father, and in His Son, Jesus Christ, and in the Holy Ghost," while the 130th section of the Doctrine and Covenants explains that "The Father has a body of flesh and bones as tangible as man's; the Son also; but the Holy Ghost has not a body of flesh and bones, but is a personage of Spirit. Were it not so, the Holy Ghost could not dwell in us." Similarities between LDS doctrines and Arianism were noted as early as 1846. There are, however, a number of key differences between Arianism and Latter-day Saint theology, including the co-eternality of Jesus Christ and the Holy Ghost with the Father. Latter-day Saints deny any form of creation ex nihilo, whereas creation ex nihilo and Christ's created and inferior nature are fundamental premises of Arianism. Arianism also teaches that Christ's existence is contingent on the Father, and that he is ontologically subordinate to the Father. Both of these premises are rejected by Latter-day Saint doctrine. Conversely, the LDS Church teaches that Christ is equal in nature, power, and glory with the Father, having perfectly subordinated his will to the Father's. In turn, the Father is understood to have his power by virtue of his own perfect character and subordination to eternal and uncreated principles of righteousness. The Book of Mormon prophet Alma summarizes this by saying that were God not to be perfectly just, then "God would cease to be God". Thus, Christ's subordination to the Father's will is understood as subordination to those same eternal and uncreated principles of righteousness through perfectly emulating the Father's character and example. The LDS Church teaches that this view of the Godhead is the doctrine taught by Jesus Christ and other ancient prophets, and, by extension, that taught by the scriptures now compiled as the Bible and the Book of Mormon. Thus, Latter-day Saint doctrine does not accept the Nicene definition of Trinity (that the three are consubstantial) nor agree with the Athanasian statement that God and Christ are incomprehensible. In contrast, the Church teaches that the Biblical doctrine is self-evident: "the Father, the Son and the Holy Spirit (or Holy Ghost)... are three physically separate beings, but fully one in love, purpose and will", as illustrated in the Farewell Prayer of Jesus, his baptism at the hands of John, his transfiguration, and the martyrdom of Stephen. Jehovah's Witnesses Jehovah's Witnesses are often referred to as "modern-day Arians" or they are sometimes referred to as "semi-Arians", usually by their opponents, although Jehovah's Witnesses themselves have denied these claims. While there are some significant similarities in matters of doctrine, Jehovah's Witnesses differ from Arians by stating that the Son can fully know the Father (something which Arius himself denied), and by their denial of personality to the Holy Spirit. The original Arians also generally prayed directly to Jesus, whereas Jehovah's Witnesses exclusively worship and pray to Jehovah God (God the Father) only through Jesus the son as a mediator. Iglesia ni Cristo The Iglesia ni Cristo's christology has parallels with Arianism in that it affirms Jesus's pre-existence, but holds that he was sanctified and given his holiness by the Father, who they hold to be the only true God. Others Other groups which oppose the belief in the Trinity are not Arian. Other Biblical Unitarians such as the Christadelphians and Church of God General Conference are typically Socinian rather than Arian in their Christology. The Gospel Assemblies, a group of Pentecostal, non-denominational churches which believe that only the Father has inherent immortality, but that the Son has received immortality from the Father, and that the Holy Spirit is not a distinct person with distinct intelligence, but rather the life and presence of God the Father and his Son. The Godhead comprises two distinct persons. There are also various binitarian churches which believe that God is two persons: the Father and the Son, and that the Holy Spirit is not a person. These include the Church of God (Seventh Day) and its various offshoots. One offshoot in particular, Radio Church of God (founded by Herbert W. Armstrong and renamed Worldwide Church of God), was originally Binitarian, but converted to Trinitarianism after Armstrong's death. That conversion prompted the formation of many small breakaway churches which retained Binitarian beliefs, such as Restored Church of God, United Church of God, Philadelphia Church of God, and Living Church of God. Other Binitarian churches include the Church of Jesus Christ (Bickertonite), an offshoot of Mormonism, which believes that God is two personages, not two persons. Binitarian churches generally believe that the Father is greater than the Son, a view somewhat similar to Arianism. See also References Notes Citations Sources Further reading External links Documents of the Early Arian Controversy Chronological survey of the sources English translations of all extant letters relating to early Arianism A map of early sympathizers with Arius Jewish Encyclopedia: Arianism Concordia Cyclopedia: Arianism (page 1) (page 2) (page 3) The Arians of the fourth century by John Henry "Cardinal" Newman in "btm" format Concise Summary of the Arian Controversy Arianism Today Christian terminology Nontrinitarian denominations Christian theological movements Christian denominations established in the 3rd century Nature of Jesus Christ

1254

https://en.wikipedia.org/wiki/August%201

August 1

Events Pre-1600 30 BC – Octavian (later known as Augustus) enters Alexandria, Egypt, bringing it under the control of the Roman Republic. AD 69 – Batavian rebellion: The Batavians in Germania Inferior (Netherlands) revolt under the leadership of Gaius Julius Civilis. 527 – Justinian I becomes the sole ruler of the Byzantine Empire. 607 – Ono no Imoko is dispatched as envoy to the Sui court in China (Traditional Japanese date: July 3, 607). 902 – Taormina, the last Byzantine stronghold in Sicily, is captured by the Aghlabid army, concluding the Muslim conquest of Sicily. 1203 – Isaac II Angelos, restored Byzantine Emperor, declares his son Alexios IV Angelos co-emperor after pressure from the forces of the Fourth Crusade. 1291 – The Old Swiss Confederacy is formed with the signature of the Federal Charter. 1469 – Louis XI of France founds the chivalric order called the Order of Saint Michael in Amboise. 1498 – Christopher Columbus becomes the first European to visit what is now Venezuela. 1571 – The Ottoman conquest of Cyprus is concluded, by the surrender of Famagusta. 1601–1900 1620 – Speedwell leaves Delfshaven to bring pilgrims to America by way of England. 1664 – Ottoman forces are defeated in the battle of Saint Gotthard by an Austrian army led by Raimondo Montecuccoli, resulting in the Peace of Vasvár. 1714 – George, Elector of Hanover, becomes King George I of Great Britain, marking the beginning of the Georgian era of British history. 1759 – Seven Years' War: The Battle of Minden, an allied Anglo-German army victory over the French. In Britain this was one of a number of events that constituted the Annus Mirabilis of 1759 and is celebrated as Minden Day by certain British Army regiments. 1774 – British scientist Joseph Priestley discovers oxygen gas, corroborating the prior discovery of this element by German-Swedish chemist Carl Wilhelm Scheele. 1798 – French Revolutionary Wars: Battle of the Nile (Battle of Aboukir Bay): Battle begins when a British fleet engages the French Revolutionary Navy fleet in an unusual night action. 1800 – The Acts of Union 1800 are passed which merge the Kingdom of Great Britain and the Kingdom of Ireland into the United Kingdom of Great Britain and Ireland. 1801 – First Barbary War: The American schooner captures the Tripolitan polacca Tripoli in a single-ship action off the coast of modern-day Libya. 1834 – Slavery is abolished in the British Empire as the Slavery Abolition Act 1833 comes into force, although it remains legal in the possessions of the East India Company until the passage of the Indian Slavery Act, 1843. 1834 – Construction begins on the Wilberforce Monument in Kingston Upon Hull. 1842 – The Lombard Street riot erupts in Philadelphia, Pennsylvania, United States. 1849 – Joven Daniel wrecks at the coast of Araucanía, Chile, leading to allegations that local Mapuche tribes murdered survivors and kidnapped Elisa Bravo. 1855 – The first ascent of Monte Rosa, the second highest summit in the Alps. 1863 – At the suggestion of Senator J. V. Snellman and the order of Emperor Alexander II, full rights were promised to the Finnish language by a language regulation in the Grand Duchy of Finland. 1876 – Colorado is admitted as the 38th U.S. state. 1893 – Henry Perky patents shredded wheat. 1894 – The Empire of Japan and Qing China declare war on each other after a week of fighting over Korea, formally inaugurating the First Sino-Japanese War. 1901–present 1907 – The start of the first Scout camp on Brownsea Island, the origin of the worldwide Scouting movement. 1911 – Harriet Quimby takes her pilot's test and becomes the first U.S. woman to earn an Aero Club of America aviator's certificate. 1914 – The German Empire declares war on the Russian Empire at the opening of World War I. The Swiss Army mobilizes because of World War I. 1927 – The Nanchang Uprising marks the first significant battle in the Chinese Civil War between the Kuomintang and Chinese Communist Party. This day is commemorated as the anniversary of the founding of the People's Liberation Army. 1933 – Anti-Fascist activists Bruno Tesch, Walter Möller, Karl Wolff and August Lütgens are executed by the Nazi regime in Altona. 1936 – The Olympics opened in Berlin with a ceremony presided over by Adolf Hitler. 1937 – Josip Broz Tito reads the resolution "Manifesto of constitutional congress of KPH" to the constitutive congress of KPH (Croatian Communist Party) in woods near Samobor. 1943 – World War II: Operation Tidal Wave also known as "Black Sunday", was a failed American attempt to destroy Romanian oil fields. 1944 – World War II: The Warsaw Uprising against the Nazi German occupation breaks out in Warsaw, Poland. 1946 – Leaders of the Russian Liberation Army, a force of Russian prisoners of war that collaborated with Nazi Germany, are executed in Moscow, Soviet Union for treason. 1950 – Guam is organized as an unincorporated territory of the United States as the President Harry S. Truman signs the Guam Organic Act. 1957 – The United States and Canada form the North American Aerospace Defense Command (NORAD). 1960 – Dahomey (later renamed Benin) declares independence from France. 1960 – Islamabad is declared the federal capital of the Government of Pakistan. 1961 – U.S. Defense Secretary Robert McNamara orders the creation of the Defense Intelligence Agency (DIA), the nation's first centralized military espionage organization. 1964 – The former Belgian Congo is renamed the Democratic Republic of the Congo. 1965 – Frank Herbert's novel, Dune was published for the first time. It was named as the world's best-selling science fiction novel in 2003. 1966 – Charles Whitman kills 16 people at the University of Texas at Austin before being killed by the police. 1966 – Purges of intellectuals and imperialists becomes official China policy at the beginning of the Cultural Revolution. 1968 – The coronation is held of Hassanal Bolkiah, the 29th Sultan of Brunei. 1971 – The Concert for Bangladesh, organized by former Beatle George Harrison, is held at Madison Square Garden in New York City. 1974 – Cyprus dispute: The United Nations Security Council authorizes the UNFICYP to create the "Green Line", dividing Cyprus into two zones. 1976 – Niki Lauda has a severe accident that almost claims his life at the German Grand Prix at Nurburgring. 1980 – Vigdís Finnbogadóttir is elected President of Iceland and becomes the world's first democratically elected female head of state. 1980 – A train crash kills 18 people in County Cork, Ireland. 1981 – MTV begins broadcasting in the United States and airs its first video, "Video Killed the Radio Star" by The Buggles. 1984 – Commercial peat-cutters discover the preserved bog body of a man, called Lindow Man, at Lindow Moss, Cheshire, England. 1988 – A British soldier was killed in the Inglis Barracks bombing in London, England. 1993 – The Great Mississippi and Missouri Rivers Flood of 1993 comes to a peak. 2004 – A supermarket fire kills 396 people and injures 500 others in Asunción, Paraguay. 2007 – The I-35W Mississippi River bridge spanning the Mississippi River in Minneapolis, Minnesota, collapses during the evening rush hour, killing 13 people and injuring 145. 2008 – The Beijing–Tianjin Intercity Railway begins operation as the fastest commuter rail system in the world. 2008 – Eleven mountaineers from international expeditions died on K2, the second-highest mountain on Earth in the worst single accident in the history of K2 mountaineering. 2017 – A suicide attack on a mosque in Herat, Afghanistan kills 20 people. Births Pre-1600 10 BC – Claudius, Roman emperor (d. 54) 126 – Pertinax, Roman emperor (d. 193) 845 – Sugawara no Michizane, Japanese scholar and politician (d. 903) 992 – Hyeonjong of Goryeo, Korean king (d. 1031) 1068 – Emperor Taizu of Jin, Chinese emperor (d. 1123) 1313 – Kōgon, Japanese emperor (d. 1364) 1377 – Go-Komatsu, Japanese emperor (d. 1433) 1385 – John FitzAlan, 13th Earl of Arundel (d. 1421) 1410 – John IV, Count of Nassau-Siegen, German count (d. 1475) 1492 – Wolfgang, Prince of Anhalt-Köthen, German prince (d. 1566) 1520 – Sigismund II, Polish king (d. 1572) 1545 – Andrew Melville, Scottish theologian and scholar (d. 1622) 1555 – Edward Kelley, English spirit medium (d. 1597) 1579 – Luis Vélez de Guevara, Spanish author and playwright (d. 1644) 1601–1900 1626 – Sabbatai Zevi, Montenegrin rabbi and theorist (d. 1676) 1630 – Thomas Clifford, 1st Baron Clifford of Chudleigh, English politician, Lord High Treasurer (d. 1673) 1659 – Sebastiano Ricci, Italian painter (d. 1734) 1713 – Charles I, German duke and prince (d. 1780) 1714 – Richard Wilson, Welsh painter and academic (d. 1782) 1738 – Jacques François Dugommier, French general (d. 1794) 1744 – Jean-Baptiste Lamarck, French soldier, biologist, and academic (d. 1829) 1770 – William Clark, American soldier, explorer, and politician, 4th Governor of Missouri Territory (d. 1838) 1779 – Francis Scott Key, American lawyer, author, and poet (d. 1843) 1779 – Lorenz Oken, German-Swiss botanist, biologist, and ornithologist (d. 1851) 1809 – William B. Travis, American colonel and lawyer (d. 1836) 1815 – Richard Henry Dana, Jr., American lawyer and politician (d. 1882) 1818 – Maria Mitchell, American astronomer and academic (d. 1889) 1819 – Herman Melville, American novelist, short story writer, and poet (d. 1891) 1831 – Antonio Cotogni, Italian opera singer and educator (d. 1918) 1843 – Robert Todd Lincoln, American lawyer and politician, 35th United States Secretary of War (d. 1926) 1856 – George Coulthard, Australian footballer and cricketer (d. 1883) 1858 – Gaston Doumergue, French lawyer and politician, 13th President of France (d. 1937) 1858 – Hans Rott, Austrian organist and composer (d. 1884) 1860 – Bazil Assan, Romanian engineer and explorer (d. 1918) 1861 – Sammy Jones, Australian cricketer (d. 1951) 1865 – Isobel Lilian Gloag, English painter (d. 1917) 1871 – John Lester, American cricketer and soccer player (d. 1969) 1877 – George Hackenschmidt, Estonian-English wrestler and strongman (d. 1968) 1878 – Konstantinos Logothetopoulos, Greek physician and politician, Prime Minister of Greece (d. 1961) 1881 – Otto Toeplitz, German mathematician and academic (d. 1940) 1885 – George de Hevesy, Hungarian-German chemist and academic, Nobel Prize laureate (d. 1966) 1889 – Walter Gerlach, German physicist and academic (d. 1979) 1891 – Karl Kobelt, Swiss lawyer and politician, 52nd President of the Swiss Confederation (d. 1968) 1893 – Alexander of Greece (d. 1920) 1894 – Ottavio Bottecchia, Italian cyclist (d. 1927) 1898 – Morris Stoloff, American composer and musical director (d. 1980) 1899 – Raymond Mays, English race car driver and businessman (d. 1980) 1900 – Otto Nothling, Australian cricketer and rugby player (d. 1965) 1901–present 1901 – Francisco Guilledo, Filipino boxer (d. 1925) 1903 – Paul Horgan, American historian, author, and academic (d. 1995) 1905 – Helen Sawyer Hogg, American-Canadian astronomer and academic (d. 1993) 1907 – Eric Shipton, Sri Lankan-English mountaineer and explorer (d. 1977) 1910 – James Henry Govier, English painter and illustrator (d. 1974) 1910 – Walter Scharf, American pianist and composer (d. 2003) 1910 – Gerda Taro, German war photographer (d. 1937) 1911 – Jackie Ormes, American journalist and cartoonist (d. 1985) 1912 – David Brand, Australian politician, 19th Premier of Western Australia (d. 1979) 1912 – Gego, German-Venezuelan sculptor and academic (d. 1994) 1912 – Henry Jones, American actor (d. 1999) 1914 – Jack Delano, American photographer and composer (d. 1997) 1914 – Alan Moore, Australian painter and educator (d. 2015) 1914 – J. Lee Thompson, English-Canadian director, producer, and screenwriter (d. 2002) 1916 – Fiorenzo Angelini, Italian cardinal (d. 2014) 1916 – Anne Hébert, Canadian author and poet (d. 2000) 1918 – T. J. Jemison, American minister and activist (d. 2013) 1919 – Stanley Middleton, English author (d. 2009) 1920 – Raul Renter, Estonian economist and chess player (d. 1992) 1921 – Jack Kramer, American tennis player, sailor, and sportscaster (d. 2009) 1921 – Pat McDonald, Australian actress (d. 1990) 1922 – Arthur Hill, Canadian-American actor (d. 2006) 1924 – Abdullah of Saudi Arabia (d. 2015) 1924 – Frank Havens, American canoeist (d. 2018) 1924 – Marcia Mae Jones, American actress and singer (d. 2007) 1924 – Frank Worrell, Barbadian cricketer (d. 1967) 1925 – Ernst Jandl, Austrian poet and author (d. 2000) 1926 – George Hauptfuhrer, American basketball player and lawyer (d. 2013) 1926 – Hannah Hauxwell, English TV personality (d. 2018) 1927 – María Teresa López Boegeholz, Chilean oceanographer (d. 2006) 1927 – Anthony G. Bosco, American bishop (d. 2013) 1928 – Jack Shea, American director, producer, and screenwriter (d. 2013) 1929 – Hafizullah Amin, Afghan educator and politician, Afghan Minister of Foreign Affairs (d. 1979) 1929 – Ann Calvello, American roller derby racer (d. 2006) 1929 – Leila Abashidze, Georgian actress (d. 2018) 1930 – Lionel Bart, English composer (d. 1999) 1930 – Pierre Bourdieu, French sociologist, anthropologist, and philosopher (d. 2002) 1930 – Julie Bovasso, American actress and writer (d. 1991) 1930 – Lawrence Eagleburger, American lieutenant and politician, 62nd United States Secretary of State (d. 2011) 1930 – Károly Grósz, Hungarian politician, 51st Prime Minister of Hungary (d. 1996) 1930 – Geoffrey Holder, Trinidadian-American actor, singer, dancer, and choreographer (d. 2014) 1931 – Ramblin' Jack Elliott, American singer-songwriter and guitarist 1931 – Trevor Goddard, South African cricketer (d. 2016) 1932 – Meir Kahane, American-Israeli rabbi and activist, founded the Jewish Defense League (d. 1990) 1933 – Dom DeLuise, American actor, singer, director, and producer (d. 2009) 1933 – Masaichi Kaneda, Japanese baseball player and manager (d. 2019) 1933 – Meena Kumari, Indian actress (d. 1972) 1933 – Teri Shields, American actress, producer, and agent (d. 2012) 1933 – Dušan Třeštík, Czech historian and author (d. 2007) 1934 – John Beck, New Zealand cricketer (d. 2000) 1934 – Derek Birdsall, English graphic designer 1935 – Geoff Pullar, English cricketer (d. 2014) 1936 – W. D. Hamilton, Egyptian born British biologist, psychologist, and academic (d. 2000) 1936 – Yves Saint Laurent, Algerian-French fashion designer, co-founded Yves Saint Laurent (d. 2008) 1936 – Laurie Taylor, English sociologist, radio host, and academic 1937 – Al D'Amato, American lawyer and politician 1939 – Bob Frankford, English-Canadian physician and politician (d. 2015) 1939 – Terry Kiser, American actor 1939 – Stephen Sykes, English bishop and theologian (d. 2014) 1939 – Robert James Waller, American author and photographer (d. 2017) 1940 – Mervyn Kitchen, English cricketer and umpire 1940 – Henry Silverman, American businessman, founded Cendant 1940 – Mahmoud Dowlatabadi, Iranian writer and actor 1941 – Ron Brown, American captain and politician, 30th United States Secretary of Commerce (d. 1996) 1941 – Étienne Roda-Gil, French songwriter and screenwriter (d. 2004) 1942 – Jerry Garcia, American singer-songwriter and guitarist (d. 1995) 1942 – Giancarlo Giannini, Italian actor, director, producer, and screenwriter 1944 – Dmitry Nikolayevich Filippov, Russian banker and politician (d. 1998) 1945 – Douglas Osheroff, American physicist and academic, Nobel Prize laureate 1946 – Boz Burrell, English singer-songwriter, bass player, and guitarist (d. 2006) 1946 – Rick Coonce, American drummer (d. 2011) 1946 – Richard O. Covey, American colonel, pilot, and astronaut 1946 – Fiona Stanley, Australian epidemiologist and academic 1947 – Lorna Goodison, Jamaican poet and author 1947 – Chantal Montellier, French comics creator and artist 1948 – Avi Arad, Israeli-American screenwriter and producer, founded Marvel Studios 1948 – Cliff Branch, American football player (d. 2019) 1948 – David Gemmell, English journalist and author (d. 2006) 1949 – Kurmanbek Bakiyev, Kyrgyzstani politician, 2nd President of Kyrgyzstan 1949 – Jim Carroll, American poet, author, and musician (d. 2009) 1949 – Ray Nettles, American football player (d. 2009) 1950 – Roy Williams, American basketball player and coach 1951 – Tim Bachman, Canadian singer-songwriter and guitarist 1951 – Tommy Bolin, American singer-songwriter and guitarist (d. 1976) 1951 – Pete Mackanin, American baseball player, coach, and manager 1952 – Zoran Đinđić, Serbian philosopher and politician, 6th Prime Minister of Serbia (d. 2003) 1953 – Robert Cray, American 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1995 – Madison Cawthorn, American politician 1996 – Katie Boulter, British tennis player 2001 – Park Si-eun, South Korean actress 2001 – Ben Trbojevic, Australian rugby league player 2003 – Joseph Sua'ali'i, Australian-Samoan rugby league player Deaths Pre-1600 30 BC – Mark Antony, Roman general and politician (b. 83 BC) 371 – Eusebius of Vercelli, Italian bishop and saint (b. 283) 527 – Justin I, Byzantine emperor (b. 450) 690s – Jonatus, abbot and saint 873 – Thachulf, duke of Thuringia 946 – Ali ibn Isa al-Jarrah, Abbasid vizier (b. 859) 946 – Lady Xu Xinyue, Chinese queen (b. 902) 953 – Yingtian, Chinese Khitan empress (b. 879) 984 – Æthelwold, bishop of Winchester 1098 – Adhemar of Le Puy, French papal legate 1137 – Louis VI, king of France (b. 1081) 1146 – Vsevolod II of Kiev, Russian prince 1227 – Shimazu Tadahisa, Japanese warlord (b. 1179) 1252 – Giovanni da Pian del Carpine, Italian archbishop and explorer (b. 1180) 1299 – Conrad de Lichtenberg, Bishop of Strasbourg (b. 1240) 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https://en.wikipedia.org/wiki/Antoninus%20Pius

Antoninus Pius

Antoninus Pius (Latin: Titus Aelius Hadrianus Antoninus Pius; 19 September 86 – 7 March 161) was Roman emperor from 138 to 161. He was the fourth of the Five Good Emperors from the Nerva–Antonine dynasty. Born into a senatorial family, Antoninus held various offices during the reign of Emperor Hadrian. He married Hadrian's niece Faustina, and Hadrian adopted him as his son and successor shortly before his death. Antoninus acquired the cognomen Pius after his accession to the throne, either because he compelled the Senate to deify his adoptive father, or because he had saved senators sentenced to death by Hadrian in his later years. His reign is notable for the peaceful state of the Empire, with no major revolts or military incursions during this time. A successful military campaign in southern Scotland early in his reign resulted in the construction of the Antonine Wall. Antoninus was an effective administrator, leaving his successors a large surplus in the treasury, expanding free access to drinking water throughout the Empire, encouraging legal conformity, and facilitating the enfranchisement of freed slaves. He died of illness in 161 and was succeeded by his adopted sons Marcus Aurelius and Lucius Verus as co-emperors. Early life Childhood and family Antoninus Pius was born Titus Aurelius Fulvus Boionius Antoninus near Lanuvium (modern-day Lanuvio) in Italy to Titus Aurelius Fulvus, consul in 86, and wife Arria Fadilla The Aurelii Fulvi were an Aurelian family settled in Nemausus (modern Nîmes). Titus Aurelius Fulvus was the son of a senator of the same name, who, as legate of Legio III Gallica, had supported Vespasian in his bid to the Imperial office and been rewarded with a suffect consulship, plus an ordinary one under Domitian in 85. The Aurelii Fulvi were therefore a relatively new senatorial family from Gallia Narbonensis whose rise to prominence was supported by the Flavians. The link between Antoninus' family and their home province explains the increasing importance of the post of proconsul of Gallia Narbonensis during the late second century. Antoninus' father had no other children and died shortly after his 89 ordinary consulship. Antoninus was raised by his maternal grandfather Gnaeus Arrius Antoninus, reputed by contemporaries to be a man of integrity and culture and a friend of Pliny the Younger. The Arrii Antonini were an older senatorial family from Italy, very influential during Nerva's reign. Arria Fadilla, Antoninus' mother, married afterwards Publius Julius Lupus, suffect consul in 98; from that marriage came two daughters, Arria Lupula and Julia Fadilla. Marriage and children Some time between 110 and 115, Antoninus married Annia Galeria Faustina the Elder. They are believed to have enjoyed a happy marriage. Faustina was the daughter of consul Marcus Annius Verus (II) and Rupilia Faustina (a step-sister to the Empress Vibia Sabina). Faustina was a beautiful woman, and despite rumours about her character, it is clear that Antoninus cared for her deeply. Faustina bore Antoninus four children, two sons and two daughters. They were: Marcus Aurelius Fulvus Antoninus (died before 138); his sepulchral inscription has been found at the Mausoleum of Hadrian in Rome. Marcus Galerius Aurelius Antoninus (died before 138); his sepulchral inscription has been found at the Mausoleum of Hadrian in Rome. His name appears on a Greek Imperial coin. Aurelia Fadilla (died in 135); she married Lucius Plautius Lamia Silvanus, consul 145. She appeared to have no children with her husband; and her sepulchral inscription has been found in Italy. Annia Galeria Faustina Minor or Faustina the Younger (between 125 and 130–175), a future Roman Empress, married her maternal cousin Marcus Aurelius in 146. When Faustina died in 141, Antoninus was greatly distressed. In honour of her memory, he asked the Senate to deify her as a goddess, and authorised the construction of a temple to be built in the Roman Forum in her name, with priestesses serving in her temple. He had various coins with her portrait struck in her honor. These coins were scripted "DIVA FAUSTINA" and were elaborately decorated. He further founded a charity, calling it Puellae Faustinianae or Girls of Faustina, which assisted destitute girls of good family. Finally, Antoninus created a new alimenta, a Roman welfare program, as part of Cura Annonae. The emperor never remarried. Instead, he lived with Galeria Lysistrate, one of Faustina's freed women. Concubinage was a form of female companionship sometimes chosen by powerful men in Ancient Rome, especially widowers like Vespasian, and Marcus Aurelius. Their union could not produce any legitimate offspring who could threaten any heirs, such as those of Antoninus. Also, as one could not have a wife and an official concubine (or two concubines) at the same time, Antoninus avoided being pressed into a marriage with a noblewoman from another family. (Later, Marcus Aurelius would also reject the advances of his former fiancée Ceionia Fabia, Lucius Verus's sister, on the grounds of protecting his children from a stepmother, and took a concubine instead.) Favour with Hadrian Having filled the offices of quaestor and praetor with more than usual success, he obtained the consulship in 120 having as his colleague Lucius Catilius Severus. He was next appointed by the Emperor Hadrian as one of the four proconsuls to administer Italia, his district including Etruria, where he had estates. He then greatly increased his reputation by his conduct as proconsul of Asia, probably during 134–135. He acquired much favor with Hadrian, who adopted him as his son and successor on 25 February 138, after the death of his first adopted son Lucius Aelius, on the condition that Antoninus would in turn adopt Marcus Annius Verus, the son of his wife's brother, and Lucius, son of Lucius Aelius, who afterwards became the emperors Marcus Aurelius and Lucius Verus. He also adopted (briefly) the name Imperator Titus Aelius Caesar Antoninus, in preparation for his rule. There seems to have been some opposition to Antoninus' appointment on the part of other potential claimants, among them his former consular colleague Lucius Catilius Severus, then prefect of the city. Nevertheless, Antoninus assumed power without opposition. Emperor On his accession, Antoninus' name and style became Imperator Caesar Titus Aelius Hadrianus Antoninus Augustus Pontifex Maximus. One of his first acts as Emperor was to persuade the Senate to grant divine honours to Hadrian, which they had at first refused; his efforts to persuade the Senate to grant these honours is the most likely reason given for his title of Pius (dutiful in affection; compare pietas). Two other reasons for this title are that he would support his aged father-in-law with his hand at Senate meetings, and that he had saved those men that Hadrian, during his period of ill-health, had condemned to death. Immediately after Hadrian's death, Antoninus approached Marcus and requested that his marriage arrangements be amended: Marcus' betrothal to Ceionia Fabia would be annulled, and he would be betrothed to Faustina, Antoninus' daughter, instead. Faustina's betrothal to Ceionia's brother Lucius Commodus would also have to be annulled. Marcus consented to Antoninus' proposal. Antoninus built temples, theaters, and mausoleums, promoted the arts and sciences, and bestowed honours and financial rewards upon the teachers of rhetoric and philosophy. Antoninus made few initial changes when he became emperor, leaving intact as far as possible the arrangements instituted by Hadrian. Epigraphical and prosopographical research has revealed that Antoninus' imperial ruling team centered around a group of closely knit senatorial families, most of them members of the priestly congregation for the cult of Hadrian, the sodales Hadrianales. According to the German historian H.G. Pflaum, prosopographical research of Antoninus' ruling team allows us to grasp the deeply conservative character of the ruling senatorial caste. Lack of warfare There are no records of any military related acts in his time in which he participated. One modern scholar has written "It is almost certain not only that at no time in his life did he ever see, let alone command, a Roman army, but that, throughout the twenty-three years of his reign, he never went within five hundred miles of a legion." His reign was the most peaceful in the entire history of the Principate, notwithstanding the fact that there were several military disturbances in the Empire in his time. Such disturbances happened in Mauretania, where a senator was named as governor of Mauretania Tingitana in place of the usual equestrian procurator and cavalry reinforcements from Pannonia were brought in, towns such as Sala and Tipasa being fortified. Similar disturbances took place in Judea, and amongst the Brigantes in Britannia; however, these were considered less serious than prior (and later) revolts among both. It was however in Britain that Antoninus decided to follow a new, more aggressive path, with the appointment of a new governor in 139, Quintus Lollius Urbicus, a native of Numidia and previously governor of Germania Inferior as well as a new man. Under instructions from the emperor, Lollius undertook an invasion of southern Scotland, winning some significant victories, and constructing the Antonine Wall from the Firth of Forth to the Firth of Clyde. The wall, however, was soon gradually decommissioned during the mid-150s and eventually abandoned late during the reign (early 160s), for reasons that are still not quite clear. Antonine's Wall is mentioned in just one literary source, Antoninus' biography in the Historia Augusta. Pausanias makes a brief and confused mention of a war in Britain. In one inscription honoring Antoninus, erected by Legio II Augusta, which participated in the building of the Wall, a relief showing four naked prisoners, one of them beheaded, seems to stand for some actual warfare. Although Antonine's Wall was, in principle, much shorter (37 miles in length as opposed to 73), and at first sight more defensible than Hadrian's Wall, the additional area that it enclosed within the Empire was barren, with land use for grazing already in decay. This meant that supply lines to the wall were strained enough such as the costs for maintaining the additional territory outweighed the benefits of doing so. Also, in the absence of urban development and the ensuing Romanization process, the rear of the wall could not be lastingly pacified. It has been therefore speculated that the invasion of Lowland Scotland and the building of the wall had to do mostly with internal politics, that is, offering Antoninus an opportunity to gain some modicum of necessary military prestige at the start of his reign. Actually, the campaign in Britannia was followed by an Imperial salutation, that is, by Antoninus formally taking for the second (and last) time the title of Imperator in 142. The fact that around the same time coins were struck announcing a victory in Britain points to Antoninus' need to publicize his achievements. The orator Fronto was later to say that, although Antoninus bestowed the direction of the British campaign to others, he should be regarded as the helmsman who directed the voyage, whose glory, therefore, belonged to him. That this quest for some military achievement responded to an actual need is proved by the fact that, although generally peaceful, Antoninus' reign was not free from attempts at usurpation: Historia Augusta mentions two, made by the senators Cornelius Priscianus ("for disturbing the peace of Spain"; Priscianus had also been Lollius Urbicus' successor as governor of Britain) and Atilius Rufius Titianus (possibly a troublemaker already exiled under Hadrian). Both attempts are confirmed by the Fasti Ostienses as well as by the erasing of Priscianus' name from an inscription. In both cases, Antoninus was not in formal charge of the ensuing repression: Priscianus committed suicide and Titianus was found guilty by the Senate, with Antoninus abstaining from sequestering their families' properties. There were also some troubles in Dacia Inferior which required the granting of additional powers to the procurator governor and the dispatch of additional soldiers to the province. On the northern Black Sea coast, the Greek city of Olbia was held against the Scythians. Also during his reign the governor of Upper Germany, probably Caius Popillius Carus Pedo, built new fortifications in the Agri Decumates, advancing the Limes Germanicus fifteen miles forward in his province and neighboring Raetia. In the East, Roman suzerainty over Armenia was retained by the choice in AD 140 of Arsacid scion Sohaemus as client king. Nevertheless, Antoninus was virtually unique among emperors in that he dealt with these crises without leaving Italy once during his reign, but instead dealt with provincial matters of war and peace through their governors or through imperial letters to the cities such as Ephesus (of which some were publicly displayed). This style of government was highly praised by his contemporaries and by later generations. Antoninus was the last Roman Emperor recognised by the Indian Kingdoms, especially the Kushan Empire. Raoul McLaughlin quotes Aurelius Victor as saying "The Indians, the Bactrians, and the Hyrcanians all sent ambassadors to Antoninus. They had all heard about the spirit of justice held by this great emperor, justice that was heightened by his handsome and grave countenance, and his slim and vigorous figure." Due to the outbreak of the Antonine epidemic and wars against northern Germanic tribes, the reign of Marcus Aurelius was forced to alter the focus of foreign policies, and matters relating to the Far East were increasingly abandoned in favour of those directly concerning the Empire's survival. Economy and administration Antoninus was regarded as a skilled administrator and as a builder. In spite of an extensive building directive—the free access of the people of Rome to drinking water was expanded with the construction of aqueducts, not only in Rome but throughout the Empire, as well as bridges and roads—the emperor still managed to leave behind a sizable public treasury of around 2.7 billion sesterces. Rome would not witness another Emperor leaving his successor with a surplus for a long time, but this treasury was depleted almost immediately after Antoninus's reign due to the Antonine Plague brought back by soldiers after the Parthian victory. The Emperor also famously suspended the collection of taxes from cities affected by natural disasters, such as when fires struck Rome and Narbona, and earthquakes affected Rhodes and the Province of Asia. He offered hefty financial grants for rebuilding and recovery of various Greek cities after two serious earthquakes: the first, circa 140, which affected mostly Rhodes and other islands; the second, in 152, which hit Cyzicus (where the huge and newly built Temple to Hadrian was destroyed), Ephesus, and Smyrna. Antoninus' financial help earned him praise by Greek writers such as Aelius Aristides and Pausanias. These cities received from Antoninus the usual honorific accolades, such as when he commanded that all governors of Asia should enter the province, when taking office, by way of Ephesus. Ephesus was specially favoured by Antoninus, who confirmed and upheld its distinction of having two temples for the imperial cult (neocorate), therefore having first place in the list of imperial honor titles, surpassing both Smyrna and Pergamon. In his dealings with Greek-speaking cities, Antoninus followed the policy adopted by Hadrian of ingratiating himself with local elites, especially with local intellectuals: philosophers, teachers of literature, rhetoricians and physicians were explicitly exempted from any duties involving private spending for civic purposes, a privilege granted by Hadrian that Antoninus confirmed by means of an edict preserved in the Digest (27.1.6.8). Antoninus also created a chair for the teaching of rhetoric in Athens. Antoninus was known as an avid observer of rites of religion and of formal celebrations, both Roman and foreign. He is known for having increasingly formalized the official cult offered to the Great Mother, which from his reign onwards included a bull sacrifice, a taurobolium, formerly only a private ritual, now being also performed for the sake of the Emperor's welfare. Antoninus also offered patronage to the worship of Mithras, to whom he erected a temple in Ostia. In 148, he presided over the celebrations of the 900th anniversary of the founding of Rome. Legal reforms Antoninus tried to portray himself as a magistrate of the res publica, no matter how extended and ill-defined his competencies were. He is credited with the splitting of the imperial treasury, the fiscus. This splitting had to do with the division of imperial properties into two parts. Firstly, the fiscus itself, or patrimonium, meaning the properties of the "Crown", the hereditary properties of each succeeding person that sat on the throne, transmitted to his successors in office, regardless of their previous membership in the imperial family. Secondly, the res privata, the "private" properties tied to the personal maintenance of the Emperor and his family, something like a Privy Purse. An anecdote in the Historia Augusta biography, where Antoninus replies to Faustina (who complained about his stinginess) that "we have gained an empire [and] lost even what we had before" possibly relates to Antoninus' actual concerns at the creation of the res privata. While still a private citizen, Antoninus had increased his personal fortune greatly by mean of various legacies, the consequence of his caring scrupulously for his relatives. Also, Antoninus left behind him a reputation for stinginess and was probably determined not to leave his personal property to be "swallowed up by the demands of the imperial throne". The res privata lands could be sold and/or given away, while the patrimonium properties were regarded as public. It was a way of pretending that the Imperial function—and most properties attached to it—was a public one, formally subject to the authority of the Senate and the Roman people. That the distinction played no part in subsequent political history—that the personal power of the princeps absorbed his role as office-holder—proves that the autocratic logic of the imperial order had already subsumed the old republican institutions. Of the public transactions of this period there is only the scantiest of information, but, to judge by what is extant, those twenty-two years were not remarkably eventful in comparison to those before and after the reign. However, Antoninus did take a great interest in the revision and practice of the law throughout the empire. One of his chief concerns was to having local communities conform their legal procedures to existing Roman norms: in a case concerning repression of banditry by local police officers ("irenarchs", Greek for "peace keepers") in Asia Minor, Antoninus ordered that these officers should not treat suspects as already condemned, and also keep a detailed copy of their interrogations, to be used in the possibility of an appeal to the Roman governor. Also, although Antoninus was not an innovator, he would not always follow the absolute letter of the law; rather he was driven by concerns over humanity and equality, and introduced into Roman law many important new principles based upon this notion. In this, the emperor was assisted by five chief lawyers: Lucius Fulvius Aburnius Valens, an author of legal treatises; Lucius Ulpius Marcellus, a prolific writer; and three others. Of these three, the most prominent was Lucius Volusius Maecianus, a former military officer turned by Antoninus into a civil procurator, and who, in view of his subsequent career (discovered on the basis of epigraphical and prosopographical research), was the Emperor's most important legal adviser. Maecianus would eventually be chosen to occupy various prefectures (see below) as well as to conduct the legal studies of Marcus Aurelius. He was also the author of a large work on Fidei commissa (Testamentary Trusts). As a hallmark of the increased connection between jurists and the imperial government, Antoninus' reign also saw the appearance of the Institutes of Gaius, an elementary legal textbook for beginners. Antoninus passed measures to facilitate the enfranchisement of slaves. Mostly, he favoured the principle of favor libertatis, giving the putative freedman the benefit of the doubt when the claim to freedom was not clearcut. Also, he punished the killing of a slave by his/her master without previous trial and determined that slaves could be forcibly sold to another master by a proconsul in cases of consistent mistreatment. Antoninus upheld the enforcement of contracts for selling of female slaves forbidding their further employment in prostitution. In criminal law, Antoninus introduced the important principle that accused persons are not to be treated as guilty before trial, as in the case of the irenarchs (see above). It was to Antoninus that the Christian apologist Justin Martyr addressed his defense of the Christian faith, reminding him of his father's (Emperor Hadrian's) rule that accusations against Christians required proof. Antoninus also asserted the principle that the trial was to be held, and the punishment inflicted, in the place where the crime had been committed. He mitigated the use of torture in examining slaves by certain limitations. Thus he prohibited the application of torture to children under fourteen years, though this rule had exceptions. However, it must be stressed that Antoninus extended, by means of a rescript, the use of torture as a means of obtaining evidence to pecuniary cases, when it had been applied up until then only in criminal cases. Also, already at the time torture of free men of low status (humiliores) had become legal, as proved by the fact that Antoninus exempted town councillors expressly from it, and also free men of high rank (honestiores) in general. One highlight during his reign occurred in 148, with the nine-hundredth anniversary of the foundation of Rome being celebrated by the hosting of magnificent games in Rome. It lasted a number of days, and a host of exotic animals were killed, including elephants, giraffes, tigers, rhinoceroses, crocodiles and hippopotamuses. While this increased Antoninus's popularity, the frugal emperor had to debase the Roman currency. He decreased the silver purity of the denarius from 89% to 83.5, the actual silver weight dropping from 2.88 grams to 2.68 grams. Scholars name Antoninus Pius as the leading candidate for an individual identified as a friend of Rabbi Judah the Prince. According to the Talmud (Avodah Zarah 10a–b), Rabbi Judah was very wealthy and greatly revered in Rome. He had a close friendship with "Antoninus", possibly Antoninus Pius, who would consult Rabbi Judah on various worldly and spiritual matters. Diplomatic mission to China The first group of people claiming to be an ambassadorial mission of Romans to China was recorded in 166 AD by the Hou Hanshu. Harper (2017) states that the embassy was likely to be a group of merchants, as many Roman merchants traveled to India and some might have gone beyond, while there are no records of official ambassadors of Rome travelling as far east. The group came to Emperor Huan of Han China and claimed to be an embassy from "Andun" (; for Anton-inus), "king of Daqin" (Rome). As Antoninus Pius died in 161, leaving the empire to his adoptive son Marcus Aurelius (Antoninus), and the envoy arrived in 166, confusion remains about who sent the mission, given that both Emperors were named "Antoninus". The Roman mission came from the south (therefore probably by sea), entering China by the frontier province of Jiaozhi at Rinan or Tonkin (present-day northern Vietnam). It brought presents of rhinoceros horns, ivory, and tortoise shell, probably acquired in South Asia. The text specifically states that it was the first time there had been direct contact between the two countries. Furthermore, a piece of Republican-era Roman glassware has been found at a Western Han tomb in Guangzhou along the South China Sea, dated to the early 1st century BC. Roman golden medallions made during the reign of Antoninus Pius and perhaps even Marcus Aurelius have been found at Óc Eo in southern Vietnam, then part of the Kingdom of Funan near the Chinese province of Jiaozhi. This may have been the port city of Kattigara, described by Ptolemy (c. 150) as being visited by a Greek sailor named Alexander and lying beyond the Golden Chersonese (i.e., Malay Peninsula). Roman coins from the reigns of Tiberius to Aurelian have been discovered in Xi'an, China (site of the Han capital Chang'an), although the significantly greater amount of Roman coins unearthed in India suggest the Roman maritime trade for purchasing Chinese silk was centered there, not in China or even the overland Silk Road running through ancient Iran. Death and legacy In 156, Antoninus Pius turned 70. He found it difficult to keep himself upright without stays. He started nibbling on dry bread to give him the strength to stay awake through his morning receptions. Marcus Aurelius had already been created consul with Antoninus in 140, receiving the title of Caesar, i.e., heir apparent. As Antoninus aged, Marcus took on more administrative duties. Marcus's administrative duties increased again after the death, in 156 or 157, of one of Antoninus' most trusted advisers, Marcus Gavius Maximus. For twenty years, Gavius Maximus had been praetorian prefect, an office that was as much secretarial as military. Gavius Maximus had been awarded with the consular insignia and the honors due a senator. He had a reputation as a most strict disciplinarian (vir severissimus, according to Historia Augusta) and some fellow equestrian procurators held lasting grudges against him. A procurator named Gaius Censorius Niger died while Gavius Maximus was alive. In his will, Censorius Niger vilified Maximus, creating serious embarrassment for one of the heirs, the orator Fronto. Gavius Maximus' death initiated a change in the ruling team. It has been speculated that it was the legal adviser Lucius Volusius Maecianus who assumed the role of grey eminence. Maecianus was briefly Praefect of Egypt, and subsequently Praefectus annonae in Rome. If it was Maecianus who rose to prominence, he may have risen precisely in order to prepare the incoming — and unprecedented — joint succession. In 160, Marcus and Lucius were designated joint consuls for the following year. Perhaps Antoninus was already ill; in any case, he died before the year was out, probably on 7 March. Two days before his death, the biographer reports, Antoninus was at his ancestral estate at Lorium, in Etruria, about from Rome. He ate Alpine Gruyere cheese at dinner quite greedily. In the night he vomited; he had a fever the next day. The day after that, he summoned the imperial council, and passed the state and his daughter to Marcus. The emperor gave the keynote to his life in the last word that he uttered: when the tribune of the night-watch came to ask the password, he responded, "aequanimitas" (equanimity). He then turned over, as if going to sleep, and died. His death closed out the longest reign since Augustus (surpassing Tiberius by a couple of months). His record for the second-longest reign would be unbeaten for 168 years, until 329 when it was surpassed by Constantine the Great. Antoninus Pius' funeral ceremonies were, in the words of the biographer, "elaborate". If his funeral followed the pattern of past funerals, his body would have been incinerated on a pyre at the Campus Martius, while his spirit would rise to the gods' home in the heavens. However, it seems that this was not the case: according to his Historia Augusta biography (which seems to reproduce an earlier, detailed report) Antoninus' body (and not his ashes) was buried in Hadrian's mausoleum. After a seven-day interval (justitium), Marcus and Lucius nominated their father for deification. In contrast to their behavior during Antoninus' campaign to deify Hadrian, the senate did not oppose the emperors' wishes. A flamen, or cultic priest, was appointed to minister the cult of the deified Antoninus, now Divus Antoninus. A column was dedicated to Antoninus on the Campus Martius, and the temple he had built in the Forum in 141 to his deified wife Faustina was rededicated to the deified Faustina and the deified Antoninus. It survives as the church of San Lorenzo in Miranda. Historiography The only intact account of his life handed down to us is that of the Augustan History, an unreliable and mostly fabricated work. Nevertheless, it still contains information that is considered reasonably sound, for instance, it is the only source that mentions the erection of the Antonine Wall in Britain. Antoninus is unique among Roman emperors in that he has no other biographies. Antoninus in many ways was the ideal of the landed gentleman praised not only by ancient Romans, but also by later scholars of classical history, such as Edward Gibbon or the author of the article on Antoninus Pius in the Encyclopædia Britannica Eleventh Edition. Some historians have a less positive view of his reign. According to the historian J. B. Bury, German historian Ernst Kornemann has had it in his Römische Geschichte [2 vols., ed. by H. Bengtson, Stuttgart 1954] that the reign of Antoninus comprised "a succession of grossly wasted opportunities", given the upheavals that were to come. There is more to this argument, given that the Parthians in the East were themselves soon to make no small amount of mischief after Antoninus' death. Kornemann's brief is that Antoninus might have waged preventive wars to head off these outsiders. Michael Grant agrees that it is possible that had Antoninus acted decisively sooner (it appears that, on his death bed, he was preparing a large-scale action against the Parthians), the Parthians might have been unable to choose their own time, but current evidence is not conclusive. Grant opines that Antoninus and his officers did act in a resolute manner dealing with frontier disturbances of his time, although conditions for long-lasting peace were not created. On the whole, according to Grant, Marcus Aurelius' eulogistic picture of Antoninus seems deserved, and Antoninus appears to have been a conservative and nationalistic (although he respected and followed Hadrian's example of Philhellenism moderately) Emperor who was not tainted by the blood of either citizen or foe, combined and maintained Numa Pompilius' good fortune, pacific dutifulness and religious scrupulousness, and whose laws removed anomalies and softened harshnesses. Krzysztof Ulanowski argues that the claims of military inability are exaggerated, considering that although the sources praise Antoninus' love for peace and his efforts "rather to defend, than enlarge the provinces", he could hardly be considered a pacifist, as shown by the conquest of the Lowlands, the building of the Antonine Wall and the expansion of Germania Superior. Ulanowski also praises Antoninus for being successful in deterrence by diplomatic means. Descendants Although only one of his four children survived to adulthood, Antoninus came to be ancestor to four generations of prominent Romans, including the Emperor Commodus. Hans-Georg Pflaum has identified five direct descendants of Antoninus and Faustina who were consuls in the first half of the third century. Marcus Aurelius Fulvus Antoninus (died before 138), died young without issue Marcus Galerius Aurelius Antoninus (died before 138), died young without issue Aurelia Fadilla (died in 135), who married Lucius Plautius Lamia Silvanus, suffect consul in 145; no children known for certain. Annia Galeria Faustina the Younger (21 September between 125 and 130–175), had several children; those who had children were: Annia Aurelia Galeria Lucilla (7 March 150–182?), whose children included: Tiberius Claudius Pompeianus Annia Galeria Aurelia Faustina (151–?), whose children included: Tiberius Claudius Severus Proculus Empress Annia Faustina, Elagabalus' third wife Annia Aurelia Fadilla (159–after 211) Annia Cornificia Faustina Minor (160–213) References Sources Primary sources Cassius Dio, Roman History, Book 70, English translation Aurelius Victor, Epitome de Caesaribu", English translation Historia Augusta, The Life of Antoninus Pius, English translation. Note that the Historia Augusta includes pseudohistorical elements. Secondary sources This source lists: Bossart-Mueller, Zur Geschichte des Kaisers A. (1868) Bryant, The Reign of Antonine (Cambridge Historical Essays, 1895) Lacour-Gayet, A. le Pieux et son Temps (1888) External links 86 births 161 deaths 2nd-century Gallo-Roman people 2nd-century Roman emperors Adult adoptees Aelii Ancient Roman adoptees Arrii Aurelii Fulvi Burials at the Castel Sant'Angelo Deified Roman emperors Gaulish people Imperial Roman consuls Imperial Roman praetors Nerva–Antonine dynasty People from Gallia Narbonensis People from Lanuvio Roman governors of Asia Roman quaestors Roman pharaohs

1259

https://en.wikipedia.org/wiki/August%203

August 3

Events Pre-1600 8 – Roman Empire general Tiberius defeats the Dalmatae on the river Bosna. 435 – Deposed Ecumenical Patriarch of Constantinople Nestorius, considered the originator of Nestorianism, is exiled by Roman Emperor Theodosius II to a monastery in Egypt. 881 – Battle of Saucourt-en-Vimeu: Louis III of France defeats the Vikings, an event celebrated in the poem Ludwigslied. 908 – Battle of Eisenach: An invading Hungarian force defeats an East Frankish army under Duke Burchard of Thuringia. 1031 – Olaf II of Norway is canonized as Saint Olaf by Grimketel, the English Bishop of Selsey. 1057 – Frederik van Lotharingen elected as first Belgian Pope Stephen IX. 1342 – The Siege of Algeciras commences during the Spanish Reconquista. 1492 – Christopher Columbus sets sail from Palos de la Frontera, Spain. 1527 – The first known letter from North America is sent by John Rut while at St. John's, Newfoundland. 1601–1900 1601 – Long War: Austria captures Transylvania in the Battle of Goroszló. 1645 – Thirty Years' War: The Second Battle of Nördlingen sees French forces defeating those of the Holy Roman Empire. 1678 – Robert LaSalle builds the Le Griffon, the first known ship built on the Great Lakes. 1778 – The theatre La Scala in Milan is inaugurated with the première of Antonio Salieri's Europa riconosciuta. 1795 – Treaty of Greenville is signed, ending the Northwest Indian War in the Ohio Country. 1811 – First ascent of Jungfrau, third highest summit in the Bernese Alps by brothers Johann Rudolf and Hieronymus Meyer. 1829 – The Treaty of Lewistown is signed by the Shawnee and Seneca peoples, exchanging land in Ohio for land west of the Mississippi River. 1852 – Harvard University wins the first Boat Race between Yale University and Harvard. The race is also known as the first ever American intercollegiate athletic event. 1859 – The American Dental Association is founded in Niagara Falls, New York. 1900 – The Firestone Tire and Rubber Company is founded. 1901–present 1903 – Macedonian rebels in Kruševo proclaim the Kruševo Republic, which exists for only ten days before Ottoman Turks lay waste to the town. 1907 – Judge Kenesaw Mountain Landis fines Standard Oil of Indiana a record $29.4 million for illegal rebating to freight carriers; the conviction and fine are later reversed on appeal. 1914 – World War I: Germany declares war against France, while Romania declares its neutrality. 1921 – Major League Baseball Commissioner Kenesaw Mountain Landis confirms the ban of the eight Chicago Black Sox, the day after they were acquitted by a Chicago court. 1936 – Jesse Owens wins the 100 metre dash, defeating Ralph Metcalfe, at the Berlin Olympics. 1936 – A fire wipes out Kursha-2 in the Meshchera Lowlands, Ryazan Oblast, Russia, killing 1,200 and leaving only 20 survivors. 1940 – World War II: Italian forces begin the invasion of British Somaliland. 1946 – Santa Claus Land, the world's first themed amusement park, opens in Santa Claus, Indiana, United States. 1948 – Whittaker Chambers accuses Alger Hiss of being a communist and a spy for the Soviet Union. 1949 – The Basketball Association of America and the National Basketball League finalize the merger that would create the National Basketball Association. 1958 – The world's first nuclear submarine, the USS Nautilus, becomes the first vessel to complete a submerged transit of the geographical North Pole. 1959 – Portugal's state police force PIDE fires upon striking workers in Bissau, Portuguese Guinea, killing over 50 people. 1960 – Niger gains independence from France. 1972 – The United States Senate ratifies the Anti-Ballistic Missile Treaty. 1975 – A privately chartered Boeing 707 strikes a mountain peak and crashes near Agadir, Morocco, killing 188. 1977 – Tandy Corporation announces the TRS-80, one of the world's first mass-produced personal computers. 1981 – Senegalese opposition parties, under the leadership of Mamadou Dia, launch the Antiimperialist Action Front – Suxxali Reew Mi. 1997 – Oued El-Had and Mezouara massacre in Algeria: A total of 116 villagers killed, 40 in Oued El-Had and 76 in Mezouara. 1997 – The tallest free-standing structure in the Southern Hemisphere, Sky Tower in downtown Auckland, New Zealand, opens after two-and-a-half years of construction. 2004 – The pedestal of the Statue of Liberty reopens after being closed since the September 11 attacks. 2005 – President of Mauritania Maaouya Ould Sid'Ahmed Taya is overthrown in a military coup while attending the funeral of King Fahd in Saudi Arabia. 2007 – Former deputy director of the Chilean secret police Raúl Iturriaga is captured after having been on the run following a conviction for kidnapping. 2010 – Widespread rioting erupts in Karachi, Pakistan, after the assassination of a local politician, leaving at least 85 dead and at least 17 billion Pakistani rupees (US$200 million) in damage. 2014 – A 6.1 magnitude earthquake kills at least 617 people and injures more than 2,400 in Yunnan, China. 2014 – The genocide of Yazidis by ISIL begins. 2018 – Two burka-clad men kill 29 people and injure more than 80 in a suicide attack on a Shia mosque in eastern Afghanistan. 2019 – Six hundred protesters, including opposition leader Lyubov Sobol, are arrested in an election protest in Moscow, Russia. 2019 – Twenty-three people are killed and 23 injured in a shooting in El Paso, Texas. Births Pre-1600 1442 – Galeotto I Pico, Duke of Mirandola (d. 1499) 1486 – Imperia Cognati, Italian courtesan (d. 1512) 1491 – Maria of Jülich-Berg, German noblewoman (d. 1543) 1509 – Étienne Dolet, French scholar and translator (d. 1546) 1601–1900 1622 – Wolfgang Julius, Count of Hohenlohe-Neuenstein, German field marshal (d. 1698) 1692 – John Henley, English minister and poet (d. 1759) 1766 – Aaron Chorin, Hungarian rabbi and author (d. 1844) 1770 – Frederick William III of Prussia (d. 1840) 1803 – Joseph Paxton, English gardener and architect, designed The Crystal Palace (d. 1865) 1808 – Hamilton Fish, American lawyer and politician, 26th United States Secretary of State (d. 1893) 1811 – Elisha Otis, American businessman, founded the Otis Elevator Company (d. 1861) 1817 – Archduke Albrecht, Duke of Teschen (d. 1895) 1823 – Thomas Francis Meagher, Irish-American revolutionary and military leader, territorial governor of Montana (d. 1867) 1832 – Ivan Zajc, Croatian composer, conductor, and director (d. 1914) 1840 – John Bigham, 1st Viscount Mersey, English jurist and politician (d. 1929) 1850 – Reginald Heber Roe, English-Australian swimmer, tennis player, and academic (d. 1926) 1856 – Alfred Deakin, Australian lawyer and politician, 2nd Prime Minister of Australia (d. 1919) 1860 – William Kennedy Dickson, French-Scottish actor, director, and producer (d. 1935) 1863 – Géza Gárdonyi, Hungarian author and journalist (d. 1922) 1867 – Stanley Baldwin, English businessman and politician, Prime Minister of the United Kingdom (d. 1947) 1871 – Vernon Louis Parrington, American historian and scholar (d. 1929) 1872 – Haakon VII of Norway (d. 1957) 1886 – Maithili Sharan Gupt, Indian poet and playwright (d. 1964) 1887 – Rupert Brooke, English poet (d. 1915) 1887 – August Wesley, Finnish journalist, trade unionist, and revolutionary (d. ?) 1890 – Konstantin Melnikov, Russian architect, designed the Rusakov Workers' Club (d. 1974) 1894 – Harry Heilmann, American baseball player and sportscaster (d. 1951) 1895 – Allen Bathurst, Lord Apsley, English politician (d. 1942) 1896 – Ralph Horween, American football player and coach (d. 1997) 1899 – Louis Chiron, Monegasque race car driver (d. 1979) 1900 – Ernie Pyle, American soldier and journalist (d. 1945) 1900 – John T. Scopes, American educator (d. 1970) 1901–present 1901 – John C. Stennis, American lawyer and politician (d. 1995) 1901 – Stefan Wyszyński, Polish cardinal (d. 1981) 1902 – Regina Jonas, German rabbi (d. 1944) 1902 – David Buttolph, American film composer (d. 1983) 1903 – Habib Bourguiba, Tunisian journalist and politician, 1st President of the Republic of Tunisia (d. 2000) 1904 – Dolores del Río, Mexican actress (d. 1983) 1904 – Clifford D. Simak, American journalist and author (d. 1988) 1905 – Franz König, Austrian cardinal (d. 2004) 1907 – Lawrence Brown, American trombonist and composer (d. 1988) 1907 – Ernesto Geisel, Brazilian general and politician, 29th President of Brazil (d. 1996) 1907 – Yang Shangkun, Chinese politician, and 4th President of China (d.1998) 1909 – Walter Van Tilburg Clark, American author and educator (d. 1971) 1911 – Alex McCrindle, Scottish actor and producer (d. 1990) 1912 – Fritz Hellwig, German politician (d. 2017) 1913 – Mel Tolkin, Ukrainian-American screenwriter and producer (d. 2007) 1916 – Shakeel Badayuni, Indian poet and songwriter (d. 1970) 1916 – José Manuel Moreno, Argentinian footballer and manager (d. 1978) 1917 – Les Elgart, American trumpet player and bandleader (d. 1995) 1918 – James MacGregor Burns, American historian, political scientist, and author (d. 2014) 1918 – Sidney Gottlieb, American chemist and theorist (d. 1999) 1918 – Larry Haines, American actor (d. 2008) 1918 – Eddie Jefferson, American singer-songwriter (d. 1979) 1920 – Norman Dewis, English test driver and engineer (d. 2019) 1920 – Max Fatchen, Australian journalist and author (d. 2012) 1920 – P. D. James, English author (d. 2014) 1920 – Charlie Shavers, American trumpet player and composer (d. 1971) 1920 – Elmar Tampõld, Estonian-Canadian architect (d. 2013) 1921 – Richard Adler, American composer and producer (d. 2012) 1921 – Hayden Carruth, American poet and critic (d. 2008) 1921 – Marilyn Maxwell, American actress (d. 1972) 1922 – John Eisenhower, American historian, general, and diplomat, 45th United States Ambassador to Belgium (d. 2013) 1923 – Jean Hagen, American actress (d. 1977) 1923 – Pope Shenouda III of Alexandria (d. 2012) 1924 – Connie Converse, American musician and singer-songwriter 1924 – Leon Uris, American soldier and author (d. 2003) 1925 – Marv Levy, American-Canadian football player, coach, and manager 1925 – Lewis Rowland, American neurologist (d. 2017) 1926 – Rona Anderson, Scottish actress (d. 2013) 1926 – Tony Bennett, American singer and actor 1926 – Anthony Sampson, English journalist and author (d. 2004) 1926 – Gordon Scott, American actor (d. 2007) 1928 – Cécile Aubry, French actress, director, and screenwriter (d. 2010) 1928 – Henning Moritzen, Danish actor (d. 2012) 1930 – James Komack, American actor, director, producer, and screenwriter (d. 1997) 1933 – Pat Crawford, Australian cricketer (d. 2009) 1934 – Haystacks Calhoun, American wrestler and actor (d. 1989) 1934 – Michael Chapman, English bassoon player (d. 2005) 1934 – Jonas Savimbi, Angolan general, founded UNITA (d. 2002) 1935 – John Erman, American actor, director, and producer (d. 2021) 1935 – Georgy Shonin, Ukrainian-Russian general, pilot, and cosmonaut (d. 1997) 1935 – Vic Vogel, Canadian pianist, composer, and bandleader (d. 2019) 1936 – Jerry G. Bishop, American radio and television host (d. 2013) 1936 – Edward Petherbridge, English actor 1937 – Steven Berkoff, English actor, director, and playwright 1937 – Roland Burris, American lawyer and politician, 39th Illinois Attorney General 1937 – Duncan Sharpe, Pakistani-Australian cricketer 1938 – Terry Wogan, Irish radio and television host (d. 2016) 1939 – Jimmie Nicol, English drummer 1939 – Apoorva Sengupta, Indian general and cricketer (d. 2013) 1940 – Lance Alworth, American football player 1940 – Martin Sheen, American actor and producer 1940 – James Tyler, American guitarist and songwriter (d. 2010) 1941 – Beverly Lee, American singer 1941 – Martha Stewart, American businesswoman, publisher, and author, founded Martha Stewart Living Omnimedia 1943 – Béla Bollobás, Hungarian-English mathematician and academic 1943 – Princess Christina, Mrs. Magnuson of Sweden 1943 – Steven Millhauser, American novelist and short story writer 1944 – Morris Berman, American historian and social critic 1944 – Nino Bravo, Spanish singer (d. 1973) 1945 – Eamon Dunphy, Irish footballer and journalist 1946 – Robert Ayling, English businessman 1946 – Jack Straw, English lawyer and politician, Shadow Deputy Prime Minister of the United Kingdom 1946 – Syreeta Wright, American singer-songwriter (d. 2004) 1946 – John York, American bass player, songwriter, and producer 1947 – Ralph Wright, English footballer (d. 2020) 1948 – Jean-Pierre Raffarin, French lawyer and politician, 166th Prime Minister of France 1949 – Philip Casnoff, American actor and director 1949 – B. B. Dickerson, American bass player and songwriter 1949 – Sue Slipman, English politician 1950 – Linda Howard, American author 1950 – John Landis, American actor, director, producer, and screenwriter 1950 – Jo Marie Payton, American actress and singer 1950 – Ernesto Samper, Colombian economist and politician, 29th President of Colombia 1951 – Marcel Dionne, Canadian ice hockey player 1951 – Jay North, American actor 1952 – Osvaldo Ardiles, Argentinian footballer and manager 1953 – Ian Bairnson, Scottish saxophonist and keyboard player 1953 – Marlene Dumas, South African painter 1954 – Michael Arthur, English physician and academic 1954 – Gary Peters, English footballer and manager 1956 – Kirk Brandon, English singer-songwriter and guitarist 1956 – Todd Christensen, American football player and sportscaster (d. 2013) 1956 – Dave Cloud, American singer-songwriter and actor (d. 2015) 1956 – Balwinder Sandhu, Indian cricketer and coach 1957 – Bodo Rudwaleit, German footballer and manager 1957 – Kate Wilkinson, New Zealand lawyer and politician, 11th New Zealand Minister of Conservation 1958 – Lindsey Hilsum, English journalist and author 1958 – Ana Kokkinos, Australian director and screenwriter 1959 – Martin Atkins, English drummer and producer 1959 – Mike Gminski, American basketball player and sportscaster 1959 – John C. 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(d. 2010) Celebrated annually as Esther day 1994 – Todd Gurley, American football player 1995 – Victoria Kan, Russian tennis player Deaths Pre-1600 908 – Burchard, duke of Thuringia 908 – Egino, duke of Thuringia 908 – Rudolf I, bishop of Würzburg 925 – Cao, Chinese empress dowager 979 – Thietmar, margrave of Meissen 1003 – At-Ta'i, Abbasid caliph (b. 929) 1355 – Bartholomew de Burghersh, 1st Baron Burghersh, English nobleman 1460 – James II, king of Scotland (b. 1430) 1527 – Scaramuccia Trivulzio, Italian cardinal 1530 – Francesco Ferruccio, Italian captain (b. 1489) 1546 – Antonio da Sangallo the Younger, Italian architect, designed the Apostolic Palace (b. 1484) 1546 – Étienne Dolet, French scholar and translator (b. 1509) 1601–1900 1604 – Bernardino de Mendoza, Spanish commander and diplomat (b. 1540) 1621 – Guillaume du Vair, French lawyer and author (b. 1556) 1712 – Joshua Barnes, English historian and scholar (b. 1654) 1720 – Anthonie Heinsius, Dutch politician (b. 1641) 1721 – Grinling Gibbons, Dutch-English sculptor and woodcarver (b. 1648) 1761 – Johann Matthias Gesner, German scholar and academic (b. 1691) 1773 – Stanisław Konarski, Polish poet and playwright (b. 1700) 1780 – Étienne Bonnot de Condillac, French epistemologist and philosopher (b. 1715) 1792 – Richard Arkwright, English engineer and businessman (b. 1732) 1797 – Jeffery Amherst, 1st Baron Amherst, English field marshal and politician, Colonial Governor of Virginia (b. 1717) 1805 – Christopher Anstey, English author and poet (b. 1724) 1835 – Wenzel Müller, Austrian composer and conductor (b. 1767) 1839 – Dorothea von Schlegel, German author and translator (b. 1763) 1857 – Eugène Sue, French author and politician (b. 1804) 1866 – Gábor Klauzál, Hungarian politician, Hungarian Minister of Agriculture (b. 1804) 1867 – Philipp August Böckh, German historian and scholar (b. 1785) 1877 – William B. 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German businesswoman (b. 1926) 2015 – Jef Murray, American artist and author (b. 1960) 2020 – John Hume, Northern Irish politician (b. 1937) 2022 – Jackie Walorski, American politician (b. 1963) Holidays and observances Anniversary of the Killing of Pidjiguiti (Guinea-Bissau) Armed Forces Day (Equatorial Guinea) Christian feast day: George Freeman Bragg, W. E. B. Du Bois (Episcopal Church) Lydia of Thyatira Myrrhbearers (Lutheran Church) Nicodemus Olaf II of Norway (Translation of the relic) Stephen (Discovery of the relic) Waltheof of Melrose August 3 (Eastern Orthodox liturgics) Flag Day (Venezuela) Independence Day, celebrates the independence of Niger from France in 1960. Arbor Day (Niger) National Guard Day (Venezuela) References External links Days of the year August

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

Advanced Encryption Standard

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

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

April 26

Events Pre-1600 1336 – Francesco Petrarca (Petrarch) ascends Mont Ventoux. 1348 – Czech king Karel IV founds the Charles University in Prague, which was later named after him and was the first university in Central Europe. 1478 – The Pazzi family attack on Lorenzo de' Medici kills his brother Giuliano during High Mass in Florence Cathedral. 1564 – Playwright William Shakespeare is baptized in Stratford-upon-Avon, Warwickshire, England (date of birth is unknown). 1601–1900 1607 – The Virginia Company colonists make landfall at Cape Henry. 1721 – A massive earthquake devastates the Iranian city of Tabriz. 1777 – Sybil Ludington, aged 16, rode to alert American colonial forces to the approach of the British regular forces 1794 – Battle of Beaumont during the Flanders Campaign of the War of the First Coalition. 1802 – Napoleon Bonaparte signs a general amnesty to allow all but about one thousand of the most notorious émigrés of the French Revolution to return to France. 1803 – Thousands of meteor fragments fall from the skies of L'Aigle, France; the event convinces European scientists that meteors exist. 1805 – First Barbary War: United States Marines captured Derne under the command of First Lieutenant Presley O'Bannon. 1865 – Union cavalry troopers corner and shoot dead John Wilkes Booth, assassin of President Abraham Lincoln, in Virginia. 1900 – Fires destroy Canadian cities Ottawa and Hull, reducing them to ashes in 12 hours. Twelve thousand people are left without a home. 1901–present 1903 – Atlético Madrid Association football club is founded 1915 – World War I: Italy secretly signs the Treaty of London pledging to join the Allied Powers. 1916 – Easter Rising: Battle of Mount Street Bridge 1920 – Ice hockey makes its Olympic debut at the Antwerp Games with center Frank Fredrickson scoring seven goals in Canada's 12–1 drubbing of Sweden in the gold medal match. 1923 – The Duke of York weds Lady Elizabeth Bowes-Lyon at Westminster Abbey. 1925 – Paul von Hindenburg defeats Wilhelm Marx in the second round of the German presidential election to become the first directly elected head of state of the Weimar Republic. 1933 – The Gestapo, the official secret police force of Nazi Germany, is established by Hermann Göring. 1933 – Nazi Germany issues the Law Against Overcrowding in Schools and Universities limiting the number of Jewish students able to attend public schools and universities. 1937 – Spanish Civil War: Guernica, Spain, is bombed by German Luftwaffe. 1942 – Benxihu Colliery accident in Manchukuo leaves 1549 Chinese miners dead. 1943 – The Easter Riots break out in Uppsala, Sweden. 1944 – Georgios Papandreou becomes head of the Greek government-in-exile based in Egypt. 1944 – Heinrich Kreipe is captured by Allied commandos in occupied Crete. 1945 – World War II: Battle of Bautzen: Last successful German tank-offensive of the war and last noteworthy victory of the Wehrmacht. 1945 – World War II: Filipino troops of the 66th Infantry Regiment, Philippine Commonwealth Army, USAFIP-NL and the American troops of the 33rd and 37th Infantry Division, United States Army are liberated in Baguio and they fight against the Japanese forces under General Tomoyuki Yamashita. 1954 – The Geneva Conference, an effort to restore peace in Indochina and Korea, begins. 1954 – The first clinical trials of Jonas Salk's polio vaccine begin in Fairfax County, Virginia. 1956 – , the world's first successful container ship, leaves Port Newark, New Jersey, for Houston, Texas. 1958 – Final run of the Baltimore and Ohio Railroad's Royal Blue from Washington, D.C., to New York City after 68 years, the first U.S. passenger train to use electric locomotives. 1960 – Forced out by the April Revolution, President of South Korea Syngman Rhee resigns after 12 years of dictatorial rule. 1962 – NASA's Ranger 4 spacecraft crashes into the Moon. 1962 – The British space programme launches its first satellite, the Ariel 1. 1963 – In Libya, amendments to the constitution transform Libya (United Kingdom of Libya) into one national unity (Kingdom of Libya) and allows for female participation in elections. 1964 – Tanganyika and Zanzibar merge to form the United Republic of Tanzania. 1966 – The magnitude 5.1 Tashkent earthquake affects the largest city in Soviet Central Asia with a maximum MSK intensity of VII (Very strong). Tashkent is mostly destroyed and 15–200 are killed. 1966 – A new government is formed in the Republic of the Congo, led by Ambroise Noumazalaye. 1970 – The Convention Establishing the World Intellectual Property Organization enters into force. 1981 – Dr. Michael R. Harrison of the University of California, San Francisco Medical Center performs the world's first human open fetal surgery. 1982 – Fifty-seven people are killed by former police officer Woo Bum-kon in a shooting spree in South Gyeongsang Province, South Korea. 1986 – The Chernobyl disaster occurs in the Ukrainian Soviet Socialist Republic. 1989 – The deadliest known tornado strikes Central Bangladesh, killing upwards of 1,300, injuring 12,000, and leaving as many as 80,000 homeless. 1989 – People's Daily publishes the April 26 Editorial which inflames the nascent Tiananmen Square protests. 1991 – Fifty-five tornadoes break out in the central United States. Before the outbreak's end, Andover, Kansas, would record the year's only F5 tornado. 1993 – The Space Shuttle Columbia is launched on mission STS-55 to conduct experiments aboard the Spacelab module. 1994 – China Airlines Flight 140 crashes at Nagoya Airport in Japan, killing 264 of the 271 people on board. 1994 – South Africa begins its first multiracial election, which is won by Nelson Mandela's African National Congress. 2002 – Robert Steinhäuser kills 16 at Gutenberg-Gymnasium in Erfurt, Germany before dying of a self-inflicted gunshot. 2005 – Cedar Revolution: Under international pressure, Syria withdraws the last of its 14,000 troop military garrison in Lebanon, ending its 29-year military domination of that country (Syrian occupation of Lebanon). 2015 – Nursultan Nazarbayev is re-elected President of Kazakhstan with 97.7% of the vote. 2018 – American comedian Bill Cosby is convicted of sexual assault. 2019 – Marvel Studios' blockbuster film, Avengers: Endgame, is released, becoming the highest-grossing film of all time, surpassing the previous box office record of Avatar. Births Pre-1600 121 – Marcus Aurelius, Roman emperor (d. 180) 757 – Hisham I of Córdoba (d. 796) 764 – Al-Hadi, Iranian caliph (d. 786) 1284 – Alice de Toeni, Countess of Warwick (d. 1324) 1319 – King John II of France (d. 1364) 1538 – Gian Paolo Lomazzo, Italian painter and academic (d. 1600) 1575 – Marie de' Medici, queen of Henry IV of France (d. 1642) 1601–1900 1647 – William Ashhurst, English banker, Sheriff of London, Lord Mayor of London and politician (d. 1720) 1648 – Peter II of Portugal (d. 1706) 1697 – Adam Falckenhagen, German lute player and composer (d. 1754) 1710 – Thomas Reid, Scottish philosopher and academic (d. 1796) 1718 – Esek Hopkins, American commander (d. 1802) 1774 – Christian Leopold von Buch, German geologist and paleontologist (d. 1853) 1782 – Maria Amalia of Naples and Sicily, Queen of France (d. 1866) 1785 – John James Audubon, French-American ornithologist and painter (d. 1851) 1787 – Ludwig Uhland, German poet, philologist, and historian (d. 1862) 1798 – Eugène Delacroix, French painter and lithographer (d. 1863) 1801 – Ambrose Dudley Mann, American politician and diplomat, 1st United States Assistant Secretary of State (d. 1889) 1804 – Charles Goodyear, American banker, lawyer, and politician (d. 1876) 1822 – Frederick Law Olmsted, American journalist and designer, co-designed Central Park (d. 1903) 1834 – Charles Farrar Browne, American author (d. 1867) 1856 – Joseph Ward, Australian-New Zealand businessman and politician, 17th Prime Minister of New Zealand (d. 1930) 1862 – Edmund C. Tarbell, American painter and educator (d. 1938) 1865 – Akseli Gallen-Kallela, Finnish artist (d. 1931) 1876 – Ernst Felle, German rower (d. 1959) 1877 – James Dooley, Irish-Australian politician, 21st Premier of New South Wales (d. 1950) 1878 – Rafael Guízar y Valencia, Mexican bishop and saint (d. 1938) 1879 – Eric Campbell, British actor (d. 1917) 1879 – Owen Willans Richardson, English physicist and academic, Nobel Prize laureate (d. 1959) 1886 – Ma Rainey, American singer-songwriter (d. 1939) 1886 – Ğabdulla Tuqay, Russian poet and publicist (d. 1913) 1889 – Anita Loos, American author, playwright, and screenwriter (d. 1981) 1889 – Ludwig Wittgenstein, Austrian-English philosopher and academic (d. 1951) 1894 – Rudolf Hess, Egyptian-German politician (d. 1987) 1896 – Ruut Tarmo, Estonian actor and director (d. 1967) 1896 – Ernst Udet, German colonel and pilot (d. 1941) 1897 – Eddie Eagan, American boxer and bobsledder (d. 1967) 1897 – Douglas Sirk, German-American director and screenwriter (d. 1987) 1898 – Vicente Aleixandre, Spanish poet and author, Nobel Prize laureate (d. 1984) 1898 – John Grierson, Scottish director and producer (d. 1972) 1899 – Oscar Rabin, Latvian-English saxophonist and bandleader (d. 1958) 1900 – Eva Aschoff, German bookbinder and calligrapher (d. 1969) 1900 – Charles Francis Richter, American seismologist and physicist (d. 1985) 1900 – Hack Wilson, American baseball player (d. 1948) 1901–present 1904 – Paul-Émile Léger, Canadian cardinal (d. 1991) 1904 – Xenophon Zolotas, Greek economist and politician, 177th Prime Minister of Greece (d. 2004) 1905 – Jean Vigo, French director and screenwriter (d. 1934) 1907 – Ilias Tsirimokos, Greek politician, Prime Minister of Greece (d. 1968) 1909 – Marianne Hoppe, German actress (d. 2002) 1910 – Tomoyuki Tanaka, Japanese screenwriter and producer (d. 1997) 1911 – Paul Verner, German soldier and politician (d. 1986) 1912 – A. E. van Vogt, Canadian-American author (d. 2000) 1914 – Bernard Malamud, American novelist and short story writer (d. 1986) 1914 – James Rouse, American real estate developer (d. 1996) 1916 – Eyvind Earle, American artist, author, and illustrator (d. 2000) 1916 – Ken Wallis, English commander, engineer, and pilot (d. 2013) 1916 – Morris West, Australian author and playwright (d. 1999) 1917 – Sal Maglie, American baseball player and coach (d. 1992) 1917 – I. M. Pei, Chinese-American architect, designed the National Gallery of Art and Bank of China Tower (d. 2019) 1917 – Virgil Trucks, American baseball player and coach (d. 2013) 1918 – Fanny Blankers-Koen, Dutch sprinter and long jumper (d. 2004) 1921 – Jimmy Giuffre, American clarinet player, saxophonist, and composer (d. 2008) 1922 – J. C. Holt, English historian and academic (d. 2014) 1922 – Jeanne Sauvé, Canadian journalist and politician, Governor General of Canada (d. 1993) 1922 – Margaret Scott, South African-Australian ballerina and choreographer (d. 2019) 1924 – Browning Ross, American runner and soldier (d. 1998) 1925 – Vladimir Boltyansky, Russian mathematician, educator and author (d. 2019) 1925 – Gerard Cafesjian, American businessman and philanthropist (d. 2013) 1925 – Michele Ferrero, Italian entrepreneur (d. 2015) 1925 – Frank Hahn, British economist (d. 2013) 1926 – Michael Mathias Prechtl, German soldier and illustrator (d. 2003) 1927 – Jack Douglas, English actor (d. 2008) 1927 – Anne McLaren, British scientist (d. 2007) 1927 – Harry Gallatin, American basketball player and coach (d. 2015) 1927 – Granny Hamner, American baseball player (d. 1993) 1929 – Richard Mitchell, American author and educator (d. 2002) 1930 – Roger Moens, Belgian runner and sportscaster 1931 – Paul Almond, Canadian director, producer, and screenwriter (d. 2015) 1931 – Bernie Brillstein, American talent agent and producer (d. 2008) 1931 – John Cain Jr., Australian politician, 41st Premier of Victoria (d. 2019) 1932 – Israr Ahmed, Indian-Pakistani theologian, philosopher, and scholar (d. 2010) 1932 – Shirley Cawley, English long jumper 1932 – Frank D'Rone, American singer and guitarist (d. 2013) 1932 – Francis Lai, French accordion player and composer (d. 2018) 1932 – Michael Smith, English-Canadian biochemist and geneticist, Nobel Prize laureate (d. 2000) 1933 – Carol Burnett, American actress, singer, and producer 1933 – Filiberto Ojeda Ríos, Puerto Rican-American general (d. 2005) 1933 – Arno Allan Penzias, German-American physicist and academic, Nobel Prize laureate 1937 – Jean-Pierre Beltoise, French racing driver and motorcycle racer (d. 2015) 1938 – Duane Eddy, American singer-songwriter, guitarist, and actor 1938 – Maurice Williams, American doo-wop/R&B singer-songwriter 1940 – Molvi Iftikhar Hussain Ansari, Indian cleric and politician (d. 2014) 1940 – Giorgio Moroder, Italian singer-songwriter and producer 1940 – Cliff Watson, English rugby league player (d. 2018) 1941 – Claudine Auger, French model and actress (d. 2019) 1942 – Svyatoslav Belza, Russian journalist, author, and critic (d. 2014) 1942 – Sharon Carstairs, Canadian lawyer and politician, Leader of the Government in the Senate 1942 – Michael Kergin, Canadian diplomat, Canadian Ambassador to the United States 1942 – Bobby Rydell, American singer and actor (d. 2022) 1942 – Jadwiga Staniszkis, Polish sociologist, political scientist, and academic 1943 – Gary Wright, American singer-songwriter, keyboard player, and producer 1943 – Peter Zumthor, Swiss architect and academic, designed the Therme Vals 1944 – Richard Bradshaw, English conductor (d. 2007) 1945 – Howard Davies, English director and producer (d. 2016) 1945 – Dick Johnson, Australian racing driver 1945 – Sylvain Simard, Canadian academic and politician 1946 – Ralph Coates, English international footballer (d. 2010) 1946 – Marilyn Nelson, American poet and author 1946 – Alberto Quintano, Chilean footballer 1949 – Carlos Bianchi, Argentinian footballer and manager 1949 – Jerry Blackwell, American wrestler (d. 1995) 1951 – John Battle, English politician 1954 – Tatyana Fomina, Estonian chess player 1954 – Alan Hinkes, English mountaineer and explorer 1955 – Kurt Bodewig, German politician 1956 – Koo Stark, American actress and photographer 1958 – John Crichton-Stuart, 7th Marquess of Bute, Scottish racing driver (d. 2021) 1958 – Giancarlo Esposito, American actor, director, and producer 1958 – Georgios Kostikos, Greek footballer, coach, and manager 1959 – John Corabi, American singer-songwriter and guitarist 1959 – Pedro Pierluisi, Puerto Rican politician 1960 – Steve Lombardozzi, American baseball player and coach 1960 – Roger Taylor, English drummer 1961 – Joan Chen, Chinese-American actress, director, producer, and screenwriter 1961 – Chris Mars, American artist 1962 – Colin Anderson, English footballer 1962 – Debra Wilson, American actress and comedian 1963 – Jet Li, Chinese-Singaporean martial artist, actor, and producer 1963 – Colin Scotts, Australian-American football player 1963 – Cornelia Ullrich, German hurdler 1963 – Bill Wennington, Canadian basketball player 1965 – Susannah Harker, English actress 1965 – Kevin James, American actor and comedian 1967 – Glenn Thomas Jacobs, American professional wrestler, actor, businessman and politician 1967 – Marianne Jean-Baptiste, English actress and singer-songwriter 1967 – Toomas Tõniste, Estonian sailor and politician 1970 – Dean Austin, English footballer and manager 1970 – Melania Trump, Slovene-American model; 47th First Lady of the United States 1970 – Kristen R. Ghodsee, American ethnographer and academic 1970 – Tionne "T-Boz" Watkins, American singer-songwriter, dancer, and actress 1971 – Naoki Tanaka, Japanese comedian and actor 1971 – Jay DeMarcus, American bass player, songwriter, and producer 1972 – Jason Bargwanna, Australian racing driver 1972 – Kiko, Spanish footballer 1972 – Natrone Means, American football player and coach 1972 – Avi Nimni, Israeli footballer and manager 1973 – Geoff Blum, American baseball player and sportscaster 1973 – Jules Naudet, French-American director and producer 1973 – Chris Perry, English footballer 1973 – Óscar, Spanish footballer and coach 1975 – Joey Jordison, American musician and songwriter (d. 2021) 1975 – Rahul Verma, Indian social worker and activist 1976 – Luigi Panarelli, Italian footballer 1976 – Václav Varaďa, Czech ice hockey player 1977 – Samantha Cristoforetti, Italian astronaut 1977 – Kosuke Fukudome, Japanese baseball player 1977 – Roxana Saberi, American journalist and author 1977 – Tom Welling, American actor 1978 – Stana Katic, Canadian actress 1978 – Peter Madsen, Danish footballer 1980 – Jordana Brewster, Panamanian-American actress 1980 – Marlon King, English footballer 1980 – Anna Mucha, Polish actress and journalist 1980 – Channing Tatum, American actor and producer 1981 – Caro Emerald, Dutch pop and jazz singer 1981 – Ms. Dynamite, English rapper and producer 1981 – Sandra Schmitt, German skier (d. 2000) 1982 – Novlene Williams-Mills, Jamaican sprinter 1983 – José María López, Argentinian racing driver 1983 – Jessica Lynch, American soldier 1985 – John Isner, American tennis player 1985 – Andrea Koch Benvenuto, Chilean tennis player 1986 – Lior Refaelov, Israeli footballer 1986 – Yuliya Zaripova, Russian runner 1987 – Jorge Andújar Moreno, Spanish footballer 1988 – Ben Spina, Australian rugby league player 1988 – Manuel Viniegra, Mexican footballer 1988 – Gareth Evans, English footballer 1989 – Melvin Ingram, American football player 1989 – Kang Daesung, South Korean singer 1990 – Mitch Rein, Australian rugby league player 1990 – Nevin Spence, Northern Irish rugby player (d. 2012) 1991 – Lazaros Fotias, Greek footballer 1991 – Peter Handscomb, Australian cricketer 1991 – Isaac Liu, New Zealand rugby league player 1991 – Ignacio Lores Varela, Uruguayan footballer 1991 – Srdjan Pejicic, Canadian/Bosnian basketball player 1991 – Wojciech Pszczolarski, Polish bicycle racer 1992 – Aaron Judge, American baseball player 1992 – Delon Wright, American basketball player 1994 – Daniil Kvyat, Russian racing driver 1996 – Jordan Pefok, American footballer 2001 – Thiago Almada, Argentine footballer 2002 – Meagan Best, Barbadian squash player Deaths Pre-1600 499 – Emperor Xiaowen of Northern Wei (b. 467) 645 – Richarius, Frankish monk and saint (b. 560) 680 – Muawiyah I, Umayyad caliph (b. 602) 757 – Pope Stephen II (b. 715) 893 – Chen Jingxuan, general of the Tang Dynasty 962 – Adalbero I, bishop of Metz 1192 – Emperor Go-Shirakawa of Japan (b. 1127) 1366 – Simon Islip, Archbishop of Canterbury 1392 – Jeong Mong-ju, Korean civil minister, diplomat and scholar (b. 1338) 1444 – Robert Campin, Flemish painter (b. 1378) 1478 – Giuliano de' Medici, Italian ruler (b. 1453) 1489 – Ashikaga Yoshihisa, Japanese shōgun (b. 1465) 1558 – Jean Fernel, French physician (b. 1497) 1601–1900 1686 – Magnus Gabriel De la Gardie, Swedish statesman and military man (b. 1622) 1716 – John Somers, 1st Baron Somers, English jurist and politician, Lord High Chancellor of Great Britain (b. 1651) 1784 – Nano Nagle, Irish nun and educator, founded the Presentation Sisters (b. 1718) 1789 – Petr Ivanovich Panin, Russian general (b. 1721) 1809 – Bernhard Schott, German music publisher (b. 1748) 1865 – John Wilkes Booth, American actor, assassin of Abraham Lincoln (b. 1838) 1881 – Ludwig Freiherr von und zu der Tann-Rathsamhausen, German general (b. 1815) 1895 – Eric Stenbock, Estonian-English author and poet (b. 1860) 1901–present 1910 – Bjørnstjerne Bjørnson, Norwegian-French author, poet, and playwright, Nobel Prize laureate (b. 1832) 1915 – John Bunny, American actor (b. 1863) 1915 – Ida Hunt Udall, American diarist (b. 1858) 1916 – Mário de Sá-Carneiro, Portuguese poet and writer (b. 1890) 1920 – Srinivasa Ramanujan, Indian mathematician and theorist (b. 1887) 1932 – William Lockwood, English cricketer (b. 1868) 1934 – Arturs Alberings, Latvian politician, former Prime Minister of Latvia (b. 1876) 1940 – Carl Bosch, German chemist and engineer, Nobel Prize laureate (b. 1874) 1944 – Violette Morris, French footballer, shot putter, and discus thrower (b. 1893) 1945 – Sigmund Rascher, German physician (b. 1909) 1945 – Pavlo Skoropadskyi, German-Ukrainian general and politician, Hetman of Ukraine (b. 1871) 1946 – James Larkin White, American miner, explorer, and park ranger (b. 1882) 1950 – George Murray Hulbert, American lawyer, judge, and politician (b. 1881) 1951 – Arnold Sommerfeld, German physicist and academic (b. 1868) 1956 – Edward Arnold, American actor (b. 1890) 1957 – Gichin Funakoshi, Japanese martial artist, founded Shotokan (b. 1868) 1964 – E. J. Pratt, Canadian poet and author (b. 1882) 1968 – John Heartfield, German illustrator and photographer (b. 1891) 1969 – Morihei Ueshiba, Japanese martial artist, founded aikido (b. 1883) 1970 – Erik Bergman, Swedish minister and author (b. 1886) 1970 – Gypsy Rose Lee, American actress, striptease dancer, and writer (b. 1911) 1973 – Irene Ryan, American actress and philanthropist (b. 1902) 1976 – Sidney Franklin, American bullfighter (b. 1903) 1976 – Sid James, South African-English actor (b. 1913) 1976 – Armstrong Sperry, American author and illustrator (b. 1897) 1980 – Cicely Courtneidge, Australian-born British actress, comedian and singer (b. 1893) 1981 – Jim Davis, American actor (b. 1909) 1984 – Count Basie, American pianist, composer, and bandleader (b. 1904) 1986 – Broderick Crawford, American actor (b. 1911) 1986 – Bessie Love, American actress (b. 1898) 1986 – Dechko Uzunov, Bulgarian painter (b. 1899) 1987 – Shankar, Indian composer and conductor (b. 1922) 1987 – John Silkin, English lawyer and politician, Shadow Leader of the House of Commons (b. 1923) 1989 – Lucille Ball, American model, actress, comedian, and producer (b. 1911) 1991 – Leo Arnaud, French-American composer and conductor (b. 1904) 1991 – Carmine Coppola, American composer and conductor (b. 1910) 1991 – A. B. Guthrie, Jr., American novelist and historian, (b. 1901) 1991 – Richard Hatfield, Canadian lawyer and politician, 26th Premier of New Brunswick (b. 1931) 1994 – Masutatsu Ōyama, Japanese martial artist, founded Kyokushin kaikan (b. 1923) 1996 – Stirling Silliphant, American screenwriter and producer (b. 1918) 1999 – Adrian Borland, English singer-songwriter, guitarist, and producer (b. 1957) 1999 – Jill Dando, English journalist and television personality (b. 1961) 2003 – Rosemary Brown, Jamaican-Canadian academic and politician (b. 1930) 2003 – Yun Hyon-seok, South Korean poet and author (b. 1984) 2003 – Edward Max Nicholson, Irish environmentalist, co-founded the World Wide Fund for Nature (b. 1904) 2004 – Hubert Selby, Jr., American author, poet, and screenwriter (b. 1928) 2005 – Mason Adams, American actor (b. 1919) 2005 – Elisabeth Domitien, Prime Minister of the Central African Republic (b. 1925) 2005 – Maria Schell, Austrian-Swiss actress (b. 1926) 2005 – Augusto Roa Bastos, Paraguayan journalist, author, and academic (b. 1917) 2007 – Jack Valenti, American businessman, created the MPAA film rating system (b. 1921) 2008 – Árpád Orbán, Hungarian footballer (b. 1938) 2009 – Hans Holzer, Austrian-American paranormal investigator and author (b. 1920) 2010 – Mariam A. Aleem, Egyptian graphic designer and academic (b. 1930) 2010 – Urs Felber, Swiss engineer and businessman (b. 1942) 2011 – Phoebe Snow, American singer-songwriter and guitarist (b. 1950) 2012 – Terence Spinks, English boxer and trainer (b. 1938) 2013 – Jacqueline Brookes, American actress and educator (b. 1930) 2013 – George Jones, American singer-songwriter and guitarist (b. 1931) 2014 – Gerald Guralnik, American physicist and academic (b. 1936) 2014 – Paul Robeson, Jr., American historian and author (b. 1927) 2014 – DJ Rashad, American electronic musician, producer and DJ (b. 1979) 2015 – Jayne Meadows, American actress (b. 1919) 2015 – Marcel Pronovost, Canadian ice hockey player and coach (b. 1930) 2016 – Harry Wu, Chinese human rights activist (b. 1937) 2017 – Jonathan Demme, American filmmaker, producer and screenwriter (b. 1944) 2022 – Klaus Schulze, German composer and musician (b. 1947) Holidays and observances Chernobyl disaster related observances: Day of Remembrance of the Chernobyl tragedy (Belarus) Memorial Day of Radiation Accidents and Catastrophes (Russia) Christian feast day: Aldobrandesca (or Alda) Franca Visalta Lucidius of Verona Our Lady of Good Counsel Pope Anacletus and Marcellinus Rafael Arnáiz Barón Riquier Paschasius Radbertus Peter of Rates (or of Braga) Robert Hunt (Episcopal Church (USA)) Stephen of Perm, see also Old Permic Alphabet Day Trudpert April 26 (Eastern Orthodox liturgics) Confederate Memorial Day (Florida, United States) Union Day (Tanzania) World Intellectual Property Day References External links BBC: On This Day Historical Events on April 26 Days of the year April

1264

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

Anisotropy

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

1267

https://en.wikipedia.org/wiki/Alpha%20decay

Alpha decay

Alpha decay or α-decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and thereby transforms or 'decays' into a different atomic nucleus, with a mass number that is reduced by four and an atomic number that is reduced by two. An alpha particle is identical to the nucleus of a helium-4 atom, which consists of two protons and two neutrons. It has a charge of and a mass of . For example, uranium-238 decays to form thorium-234. While alpha particles have a charge , this is not usually shown because a nuclear equation describes a nuclear reaction without considering the electrons – a convention that does not imply that the nuclei necessarily occur in neutral atoms. Alpha decay typically occurs in the heaviest nuclides. Theoretically, it can occur only in nuclei somewhat heavier than nickel (element 28), where the overall binding energy per nucleon is no longer a maximum and the nuclides are therefore unstable toward spontaneous fission-type processes. In practice, this mode of decay has only been observed in nuclides considerably heavier than nickel, with the lightest known alpha emitters being the lightest isotopes (mass numbers 104–109) of tellurium (element 52). Exceptionally, however, beryllium-8 decays to two alpha particles. Alpha decay is by far the most common form of cluster decay, where the parent atom ejects a defined daughter collection of nucleons, leaving another defined product behind. It is the most common form because of the combined extremely high nuclear binding energy and relatively small mass of the alpha particle. Like other cluster decays, alpha decay is fundamentally a quantum tunneling process. Unlike beta decay, it is governed by the interplay between both the strong nuclear force and the electromagnetic force. Alpha particles have a typical kinetic energy of 5 MeV (or ≈ 0.13% of their total energy, 110 TJ/kg) and have a speed of about 15,000,000 m/s, or 5% of the speed of light. There is surprisingly small variation around this energy, due to the strong dependence of the half-life of this process on the energy produced. Because of their relatively large mass, the electric charge of and relatively low velocity, alpha particles are very likely to interact with other atoms and lose their energy, and their forward motion can be stopped by a few centimeters of air. Approximately 99% of the helium produced on Earth is the result of the alpha decay of underground deposits of minerals containing uranium or thorium. The helium is brought to the surface as a by-product of natural gas production. History Alpha particles were first described in the investigations of radioactivity by Ernest Rutherford in 1899, and by 1907 they were identified as He2+ ions. By 1928, George Gamow had solved the theory of alpha decay via tunneling. The alpha particle is trapped inside the nucleus by an attractive nuclear potential well and a repulsive electromagnetic potential barrier. Classically, it is forbidden to escape, but according to the (then) newly discovered principles of quantum mechanics, it has a tiny (but non-zero) probability of "tunneling" through the barrier and appearing on the other side to escape the nucleus. Gamow solved a model potential for the nucleus and derived, from first principles, a relationship between the half-life of the decay, and the energy of the emission, which had been previously discovered empirically and was known as the Geiger–Nuttall law. Mechanism The nuclear force holding an atomic nucleus together is very strong, in general much stronger than the repulsive electromagnetic forces between the protons. However, the nuclear force is also short-range, dropping quickly in strength beyond about 3 femtometers, while the electromagnetic force has an unlimited range. The strength of the attractive nuclear force keeping a nucleus together is thus proportional to the number of the nucleons, but the total disruptive electromagnetic force of proton-proton repulsion trying to break the nucleus apart is roughly proportional to the square of its atomic number. A nucleus with 210 or more nucleons is so large that the strong nuclear force holding it together can just barely counterbalance the electromagnetic repulsion between the protons it contains. Alpha decay occurs in such nuclei as a means of increasing stability by reducing size. One curiosity is why alpha particles, helium nuclei, should be preferentially emitted as opposed to other particles like a single proton or neutron or other atomic nuclei. Part of the reason is the high binding energy of the alpha particle, which means that its mass is less than the sum of the masses of two free protons and two free neutrons. This increases the disintegration energy. Computing the total disintegration energy given by the equation where is the initial mass of the nucleus, is the mass of the nucleus after particle emission, and is the mass of the emitted (alpha-)particle, one finds that in certain cases it is positive and so alpha particle emission is possible, whereas other decay modes would require energy to be added. For example, performing the calculation for uranium-232 shows that alpha particle emission releases 5.4 MeV of energy, while a single proton emission would require 6.1 MeV. Most of the disintegration energy becomes the kinetic energy of the alpha particle, although to fulfill conservation of momentum, part of the energy goes to the recoil of the nucleus itself (see atomic recoil). However, since the mass numbers of most alpha-emitting radioisotopes exceed 210, far greater than the mass number of the alpha particle (4), the fraction of the energy going to the recoil of the nucleus is generally quite small, less than 2%. Nevertheless, the recoil energy (on the scale of keV) is still much larger than the strength of chemical bonds (on the scale of eV), so the daughter nuclide will break away from the chemical environment the parent was in. The energies and ratios of the alpha particles can be used to identify the radioactive parent via alpha spectrometry. These disintegration energies, however, are substantially smaller than the repulsive potential barrier created by the interplay between the strong nuclear and the electromagnetic force, which prevents the alpha particle from escaping. The energy needed to bring an alpha particle from infinity to a point near the nucleus just outside the range of the nuclear force's influence is generally in the range of about 25 MeV. An alpha particle within the nucleus can be thought of as being inside a potential barrier whose walls are 25 MeV above the potential at infinity. However, decay alpha particles only have energies of around 4 to 9 MeV above the potential at infinity, far less than the energy needed to overcome the barrier and escape. Quantum mechanics, however, allows the alpha particle to escape via quantum tunneling. The quantum tunneling theory of alpha decay, independently developed by George Gamow and by Ronald Wilfred Gurney and Edward Condon in 1928, was hailed as a very striking confirmation of quantum theory. Essentially, the alpha particle escapes from the nucleus not by acquiring enough energy to pass over the wall confining it, but by tunneling through the wall. Gurney and Condon made the following observation in their paper on it: It has hitherto been necessary to postulate some special arbitrary 'instability' of the nucleus, but in the following note, it is pointed out that disintegration is a natural consequence of the laws of quantum mechanics without any special hypothesis... Much has been written of the explosive violence with which the α-particle is hurled from its place in the nucleus. But from the process pictured above, one would rather say that the α-particle almost slips away unnoticed. The theory supposes that the alpha particle can be considered an independent particle within a nucleus, that is in constant motion but held within the nucleus by strong interaction. At each collision with the repulsive potential barrier of the electromagnetic force, there is a small non-zero probability that it will tunnel its way out. An alpha particle with a speed of 1.5×107 m/s within a nuclear diameter of approximately 10−14 m will collide with the barrier more than 1021 times per second. However, if the probability of escape at each collision is very small, the half-life of the radioisotope will be very long, since it is the time required for the total probability of escape to reach 50%. As an extreme example, the half-life of the isotope bismuth-209 is . The isotopes in beta-decay stable isobars that are also stable with regards to double beta decay with mass number A = 5, A = 8, 143 ≤ A ≤ 155, 160 ≤ A ≤ 162, and A ≥ 165 are theorized to undergo alpha decay. All other mass numbers (isobars) have exactly one theoretically stable nuclide. Those with mass 5 decay to helium-4 and a proton or a neutron, and those with mass 8 decay to two helium-4 nuclei; their half-lives (helium-5, lithium-5, and beryllium-8) are very short, unlike the half-lives for all other such nuclides with A ≤ 209, which are very long. (Such nuclides with A ≤ 209 are primordial nuclides except 146Sm.) Working out the details of the theory leads to an equation relating the half-life of a radioisotope to the decay energy of its alpha particles, a theoretical derivation of the empirical Geiger–Nuttall law. Uses Americium-241, an alpha emitter, is used in smoke detectors. The alpha particles ionize air in an open ion chamber and a small current flows through the ionized air. Smoke particles from the fire that enter the chamber reduce the current, triggering the smoke detector's alarm. Radium-223 is also an alpha emitter. It is used in the treatment of skeletal metastases (cancers in the bones). Alpha decay can provide a safe power source for radioisotope thermoelectric generators used for space probes and were used for artificial heart pacemakers. Alpha decay is much more easily shielded against than other forms of radioactive decay. Static eliminators typically use polonium-210, an alpha emitter, to ionize the air, allowing the 'static cling' to dissipate more rapidly. Toxicity Highly charged and heavy, alpha particles lose their several MeV of energy within a small volume of material, along with a very short mean free path. This increases the chance of double-strand breaks to the DNA in cases of internal contamination, when ingested, inhaled, injected or introduced through the skin. Otherwise, touching an alpha source is typically not harmful, as alpha particles are effectively shielded by a few centimeters of air, a piece of paper, or the thin layer of dead skin cells that make up the epidermis; however, many alpha sources are also accompanied by beta-emitting radio daughters, and both are often accompanied by gamma photon emission. Relative biological effectiveness (RBE) quantifies the ability of radiation to cause certain biological effects, notably either cancer or cell-death, for equivalent radiation exposure. Alpha radiation has a high linear energy transfer (LET) coefficient, which is about one ionization of a molecule/atom for every angstrom of travel by the alpha particle. The RBE has been set at the value of 20 for alpha radiation by various government regulations. The RBE is set at 10 for neutron irradiation, and at 1 for beta radiation and ionizing photons. However, the recoil of the parent nucleus (alpha recoil) gives it a significant amount of energy, which also causes ionization damage (see ionizing radiation). This energy is roughly the weight of the alpha (4 u) divided by the weight of the parent (typically about 200 u) times the total energy of the alpha. By some estimates, this might account for most of the internal radiation damage, as the recoil nucleus is part of an atom that is much larger than an alpha particle, and causes a very dense trail of ionization; the atom is typically a heavy metal, which preferentially collect on the chromosomes. In some studies, this has resulted in an RBE approaching 1,000 instead of the value used in governmental regulations. The largest natural contributor to public radiation dose is radon, a naturally occurring, radioactive gas found in soil and rock. If the gas is inhaled, some of the radon particles may attach to the inner lining of the lung. These particles continue to decay, emitting alpha particles, which can damage cells in the lung tissue. The death of Marie Curie at age 66 from aplastic anemia was probably caused by prolonged exposure to high doses of ionizing radiation, but it is not clear if this was due to alpha radiation or X-rays. Curie worked extensively with radium, which decays into radon, along with other radioactive materials that emit beta and gamma rays. However, Curie also worked with unshielded X-ray tubes during World War I, and analysis of her skeleton during a reburial showed a relatively low level of radioisotope burden. The Russian dissident Alexander Litvinenko's 2006 murder by radiation poisoning is thought to have been carried out with polonium-210, an alpha emitter. References Alpha emitters by increasing energy (Appendix 1) Notes External links The LIVEChart of Nuclides - IAEA with filter on alpha decay Alpha decay with 3 animated examples showing the recoil of daughter Helium Nuclear physics Radioactivity

1270

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

Extreme poverty

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

1271

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

Analytical Engine

The Analytical Engine was a proposed mechanical general-purpose computer designed by English mathematician and computer pioneer Charles Babbage. It was first described in 1837 as the successor to Babbage's difference engine, which was a design for a simpler mechanical calculator. The Analytical Engine incorporated an arithmetic logic unit, control flow in the form of conditional branching and loops, and integrated memory, making it the first design for a general-purpose computer that could be described in modern terms as Turing-complete. In other words, the structure of the Analytical Engine was essentially the same as that which has dominated computer design in the electronic era. The Analytical Engine is one of the most successful achievements of Charles Babbage. Babbage was never able to complete construction of any of his machines due to conflicts with his chief engineer and inadequate funding. It was not until 1941 that Konrad Zuse built the first general-purpose computer, Z3, more than a century after Babbage had proposed the pioneering Analytical Engine in 1837. Design Babbage's first attempt at a mechanical computing device, the Difference Engine, was a special-purpose machine designed to tabulate logarithms and trigonometric functions by evaluating finite differences to create approximating polynomials. Construction of this machine was never completed; Babbage had conflicts with his chief engineer, Joseph Clement, and ultimately the British government withdrew its funding for the project. During this project, Babbage realised that a much more general design, the Analytical Engine, was possible. The work on the design of the Analytical Engine started around 1833. The input, consisting of programs ("formulae") and data, was to be provided to the machine via punched cards, a method being used at the time to direct mechanical looms such as the Jacquard loom. For output, the machine would have a printer, a curve plotter, and a bell. The machine would also be able to punch numbers onto cards to be read in later. It employed ordinary base-10 fixed-point arithmetic. There was to be a store (that is, a memory) capable of holding 1,000 numbers of 40 decimal digits each (ca. 16.6 kB). An arithmetic unit (the "mill") would be able to perform all four arithmetic operations, plus comparisons and optionally square roots. Initially (1838) it was conceived as a difference engine curved back upon itself, in a generally circular layout, with the long store exiting off to one side. Later drawings (1858) depict a regularised grid layout. Like the central processing unit (CPU) in a modern computer, the mill would rely upon its own internal procedures, to be stored in the form of pegs inserted into rotating drums called "barrels", to carry out some of the more complex instructions the user's program might specify. The programming language to be employed by users was akin to modern day assembly languages. Loops and conditional branching were possible, and so the language as conceived would have been Turing-complete as later defined by Alan Turing. Three different types of punch cards were used: one for arithmetical operations, one for numerical constants, and one for load and store operations, transferring numbers from the store to the arithmetical unit or back. There were three separate readers for the three types of cards. Babbage developed some two dozen programs for the Analytical Engine between 1837 and 1840, and one program later. These programs treat polynomials, iterative formulas, Gaussian elimination, and Bernoulli numbers. In 1842, the Italian mathematician Luigi Federico Menabrea published a description of the engine in French, based on lectures Babbage gave when he visited Turin in 1840. In 1843, the description was translated into English and extensively annotated by Ada Lovelace, who had become interested in the engine eight years earlier. In recognition of her additions to Menabrea's paper, which included a way to calculate Bernoulli numbers using the machine (widely considered to be the first complete computer program), she has been described as the first computer programmer. Construction Late in his life, Babbage sought ways to build a simplified version of the machine, and assembled a small part of it before his death in 1871. In 1878, a committee of the British Association for the Advancement of Science described the Analytical Engine as "a marvel of mechanical ingenuity", but recommended against constructing it. The committee acknowledged the usefulness and value of the machine, but could not estimate the cost of building it, and were unsure whether the machine would function correctly after being built. Intermittently from 1880 to 1910, Babbage's son Henry Prevost Babbage was constructing a part of the mill and the printing apparatus. In 1910, it was able to calculate a (faulty) list of multiples of pi. This constituted only a small part of the whole engine; it was not programmable and had no storage. (Popular images of this section have sometimes been mislabelled, implying that it was the entire mill or even the entire engine.) Henry Babbage's "Analytical Engine Mill" is on display at the Science Museum in London. Henry also proposed building a demonstration version of the full engine, with a smaller storage capacity: "perhaps for a first machine ten (columns) would do, with fifteen wheels in each". Such a version could manipulate 20 numbers of 25 digits each, and what it could be told to do with those numbers could still be impressive. "It is only a question of cards and time", wrote Henry Babbage in 1888, "... and there is no reason why (twenty thousand) cards should not be used if necessary, in an Analytical Engine for the purposes of the mathematician". In 1991, the London Science Museum built a complete and working specimen of Babbage's Difference Engine No. 2, a design that incorporated refinements Babbage discovered during the development of the Analytical Engine. This machine was built using materials and engineering tolerances that would have been available to Babbage, quelling the suggestion that Babbage's designs could not have been produced using the manufacturing technology of his time. In October 2010, John Graham-Cumming started a "Plan 28" campaign to raise funds by "public subscription" to enable serious historical and academic study of Babbage's plans, with a view to then build and test a fully working virtual design which will then in turn enable construction of the physical Analytical Engine. As of May 2016, actual construction had not been attempted, since no consistent understanding could yet be obtained from Babbage's original design drawings. In particular it was unclear whether it could handle the indexed variables which were required for Lovelace's Bernoulli program. By 2017, the "Plan 28" effort reported that a searchable database of all catalogued material was available, and an initial review of Babbage's voluminous Scribbling Books had been completed. Many of Babbage's original drawings have been digitised and are publicly available online. Instruction set Babbage is not known to have written down an explicit set of instructions for the engine in the manner of a modern processor manual. Instead he showed his programs as lists of states during their execution, showing what operator was run at each step with little indication of how the control flow would be guided. Allan G. Bromley has assumed that the card deck could be read in forwards and backwards directions as a function of conditional branching after testing for conditions, which would make the engine Turing-complete: ...the cards could be ordered to move forward and reverse (and hence to loop)... The introduction for the first time, in 1845, of user operations for a variety of service functions including, most importantly, an effective system for user control of looping in user programs. There is no indication how the direction of turning of the operation and variable cards is specified. In the absence of other evidence I have had to adopt the minimal default assumption that both the operation and variable cards can only be turned backward as is necessary to implement the loops used in Babbage's sample programs. There would be no mechanical or microprogramming difficulty in placing the direction of motion under the control of the user. In their emulator of the engine, Fourmilab say: The Engine's Card Reader is not constrained to simply process the cards in a chain one after another from start to finish. It can, in addition, directed by the very cards it reads and advised by whether the Mill's run-up lever is activated, either advance the card chain forward, skipping the intervening cards, or backward, causing previously-read cards to be processed once again. This emulator does provide a written symbolic instruction set, though this has been constructed by its authors rather than based on Babbage's original works. For example, a factorial program would be written as: N0 6 N1 1 N2 1 × L1 L0 S1 – L0 L2 S0 L2 L0 CB?11 where the CB is the conditional branch instruction or "combination card" used to make the control flow jump, in this case backward by 11 cards. Influence Predicted influence Babbage understood that the existence of an automatic computer would kindle interest in the field now known as algorithmic efficiency, writing in his Passages from the Life of a Philosopher, "As soon as an Analytical Engine exists, it will necessarily guide the future course of the science. Whenever any result is sought by its aid, the question will then arise—By what course of calculation can these results be arrived at by the machine in the shortest time?" Computer science From 1872 Henry continued diligently with his father's work and then intermittently in retirement in 1875. Percy Ludgate wrote about the engine in 1914 and published his own design for an Analytical Engine in 1909. It was drawn up in detail, but never built, and the drawings have never been found. Ludgate's engine would be much smaller (about , which corresponds to cube of side length ) than Babbage's, and hypothetically would be capable of multiplying two 20-decimal-digit numbers in about six seconds. In his Essays on Automatics (1913) Leonardo Torres y Quevedo, inspired by Babbage, designed a theoretical electromechanical calculating machine which was to be controlled by a read-only program. The paper also contains the idea of floating-point arithmetic. Vannevar Bush's paper Instrumental Analysis (1936) included several references to Babbage's work. In the same year he started the Rapid Arithmetical Machine project to investigate the problems of constructing an electronic digital computer. Despite this groundwork, Babbage's work fell into historical obscurity, and the Analytical Engine was unknown to builders of electromechanical and electronic computing machines in the 1930s and 1940s when they began their work, resulting in the need to re-invent many of the architectural innovations Babbage had proposed. Howard Aiken, who built the quickly-obsoleted electromechanical calculator, the Harvard Mark I, between 1937 and 1945, praised Babbage's work likely as a way of enhancing his own stature, but knew nothing of the Analytical Engine's architecture during the construction of the Mark I, and considered his visit to the constructed portion of the Analytical Engine "the greatest disappointment of my life". The Mark I showed no influence from the Analytical Engine and lacked the Analytical Engine's most prescient architectural feature, conditional branching. J. Presper Eckert and John W. Mauchly similarly were not aware of the details of Babbage's Analytical Engine work prior to the completion of their design for the first electronic general-purpose computer, the ENIAC. Comparison to other early computers If the Analytical Engine had been built, it would have been digital, programmable and Turing-complete. It would, however, have been very slow. Luigi Federico Menabrea reported in Sketch of the Analytical Engine: "Mr. Babbage believes he can, by his engine, form the product of two numbers, each containing twenty figures, in three minutes". By comparison the Harvard Mark I could perform the same task in just six seconds. A modern PC can do the same thing in well under a billionth of a second. In popular culture The cyberpunk novelists William Gibson and Bruce Sterling co-authored a steampunk novel of alternative history titled The Difference Engine in which Babbage's difference and Analytical Engines became available to Victorian society. The novel explores the consequences and implications of the early introduction of computational technology. Moriarty by Modem, a short story by Jack Nimersheim, describes an alternative history where Babbage's Analytical Engine was indeed completed and had been deemed highly classified by the British government. The characters of Sherlock Holmes and Moriarty had in reality been a set of prototype programs written for the Analytical Engine. This short story follows Holmes as his program is implemented on modern computers and he is forced to compete against his nemesis yet again in the modern counterparts of Babbage's Analytical Engine. A similar setting is used by Sydney Padua in the webcomic The Thrilling Adventures of Lovelace and Babbage. It features an alternative history where Ada Lovelace and Babbage have built the Analytical Engine and use it to fight crime at Queen Victoria's request. The comic is based on thorough research on the biographies of and correspondence between Babbage and Lovelace, which is then twisted for humorous effect. The Orion's Arm online project features the Machina Babbagenseii, fully sentient Babbage-inspired mechanical computers. Each is the size of a large asteroid, only capable of surviving in microgravity conditions, and processes data at 0.5% the speed of a human brain. References Bibliography External links The Babbage Papers, Science Museum archive The Analytical Engine at Fourmilab, includes historical documents and online simulations Image of a later Plan of Analytical Engine with grid layout (1858) First working Babbage "barrel" actually assembled, circa 2005 Special issue, IEEE Annals of the History of Computing, Volume 22, Number 4, October–December 2000 Babbage, Science Museum, London (archived) Plan 28: Building Charles Babbage's Analytical Engine Charles Babbage Computer-related introductions in 1837 English inventions Mechanical calculators Mechanical computers One-of-a-kind computers

1273

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

Augustus

Caesar Augustus (born Gaius Octavius; 23 September 63 BC – 19 August AD 14), also known as Octavian, was the first Roman emperor; he reigned from 27 BC until his death in AD 14. He is known for being the founder of the Roman Principate, which is the first phase of the Roman Empire, and is considered one of the greatest leaders in human history. The reign of Augustus initiated an imperial cult as well as an era associated with imperial peace, the Pax Romana or Pax Augusta. The Roman world was largely free from large-scale conflict for more than two centuries despite continuous wars of imperial expansion on the empire's frontiers and the year-long civil war known as the "Year of the Four Emperors" over the imperial succession. Originally named Gaius Octavius, he was born into an old and wealthy equestrian branch of the plebeian gens Octavia. His maternal great-uncle Julius Caesar was assassinated in 44 BC, and Octavius was named in Caesar's will as his adopted son and heir; as a result, he inherited Caesar's name, estate, and the loyalty of his legions. He, Mark Antony and Marcus Lepidus formed the Second Triumvirate to defeat the assassins of Caesar. Following their victory at the Battle of Philippi (42 BC), the Triumvirate divided the Roman Republic among themselves and ruled as de facto dictators. The Triumvirate was eventually torn apart by the competing ambitions of its members; Lepidus was exiled in 36 BC, and Antony was defeated by Octavian at the Battle of Actium in 31 BC. After the demise of the Second Triumvirate, Augustus restored the outward façade of the free republic, with governmental power vested in the Roman Senate, the executive magistrates and the legislative assemblies, yet he maintained autocratic authority by having the Senate grant him lifetime tenure as commander-in-chief, tribune and censor. A similar ambiguity is seen in his chosen names, the implied rejection of monarchical titles whereby he called himself Princeps Civitatis (First Citizen) juxtaposed with his adoption of the title augustus. Augustus dramatically enlarged the empire, annexing Egypt, Dalmatia, Pannonia, Noricum and Raetia, expanding possessions in Africa, and completing the conquest of Hispania, but he suffered a major setback in Germania. Beyond the frontiers, he secured the empire with a buffer region of client states and made peace with the Parthian Empire through diplomacy. He reformed the Roman system of taxation, developed networks of roads with an official courier system, established a standing army, established the Praetorian Guard as well as official police and fire-fighting services for Rome, and rebuilt much of the city during his reign. Augustus died in AD 14 at age 75, probably from natural causes. Persistent rumors, substantiated somewhat by deaths in the imperial family, have claimed his wife Livia poisoned him. He was succeeded as emperor by his adopted son Tiberius, Livia's son and also former husband of Augustus' only biological daughter Julia. Name As a consequence of Roman customs, society, and personal preference, Augustus ( ) was known by many names throughout his life: Gaius Octavius ( , ). According to Suetonius, the cognomen Thurinus () was added to his birth name as a toddler in 60 BC. Later, after he had taken the name of Caesar, his rival Mark Antony referred to him as "Thurinus" in order to belittle him. In response, he merely said he was surprised that "using his old name was thought to be an insult". Gaius Julius Caesar Octavianus. He took the name of his adoptive father, Julius Caesar, but was often distinguished from him as "Octavianus" (), the adjectival form of "Octavius". He is mainly known by the anglicization "Octavian" ( ) for the period between 44 and 27 BC. Imperator Caesar. Octavian's early coins and inscriptions all refer to him simply as Gaius Caesar, but by 38 BC he had replaced "Gaius" with the victory title imperator ("commander"). Occasionally the epithet divi filius or ("son of the divine Julius") was included, alluding to Julius Caesar's deification in 42 BC. Imperator Caesar Augustus. On 16 January 27 BC, partly on his own insistence, the Roman Senate granted him the surname Augustus (). Historians use this name to refer to him from 27 BC until his death in AD 14. Early life While his paternal family was from the Volscian town of Velletri, approximately south-east of Rome, Augustus was born in Rome on 23 September 63 BC. He was born at Ox Head, a small property on the Palatine Hill, very close to the Roman Forum. He was given the name Gaius Octavius, and in his childhood he received the cognomen Thurinus, possibly commemorating his father's victory at Thurii over a rebellious band of slaves which occurred a few years after his birth. Suetonius wrote: "There are many indications that the Octavian family was in days of old a distinguished one at Velitrae; for not only was a street in the most frequented part of town long ago called Octavian, but an altar was shown there besides, consecrated by an Octavius. This man was leader in a war with a neighbouring town ..." Due to the crowded nature of Rome at the time, Octavius was taken to his father's home village at Velletri to be raised. Octavius mentions his father's equestrian family only briefly in his memoirs. His paternal great-grandfather Gaius Octavius was a military tribune in Sicily during the Second Punic War. His grandfather had served in several local political offices. His father, also named Gaius Octavius, had been governor of Macedonia. His mother, Atia, was the niece of Julius Caesar. His father died in 59 BC when he was four years old. His mother married a former governor of Syria, Lucius Marcius Philippus. Philippus claimed descent from Alexander the Great and was elected consul in 56 BC. Philippus never had much of an interest in young Octavius. Because of this, Octavius was raised by his grandmother, Julia, the sister of Julius Caesar. Julia died in 52 or 51 BC, and Octavius delivered the funeral oration for his grandmother. From this point, his mother and stepfather took a more active role in raising him. He donned the toga virilis ("toga of manhood") four years later and was elected to the College of Pontiffs in 47 BC. The following year he was put in charge of the Greek games that were staged in honor of the Temple of Venus Genetrix, built by Julius Caesar. According to Nicolaus of Damascus, Octavius wished to join Caesar's staff for his campaign in Africa but gave way when his mother protested. In 46 BC, she consented for him to join Caesar in Hispania, where he planned to fight the forces of Pompey, Caesar's late enemy, but Octavius fell ill and was unable to travel. When he had recovered, he sailed to the front but was shipwrecked. After coming ashore with a handful of companions, he crossed hostile territory to Caesar's camp, which impressed his great-uncle considerably. Velleius Paterculus reports that after that time, Caesar allowed the young man to share his carriage. When back in Rome, Caesar deposited a new will with the Vestal Virgins, naming Octavius as the prime beneficiary. Rise to power Heir to Caesar Octavius was studying and undergoing military training in Apollonia, Illyria, when Julius Caesar was assassinated on the Ides of March (15 March) 44 BC. He rejected the advice of some army officers to take refuge with the troops in Macedonia and sailed to Italy to ascertain whether he had any potential political fortunes or security. Caesar had no living legitimate children under Roman law and so had adopted Octavius, his grand-nephew, making him his primary heir. Mark Antony later charged that Octavian had earned his adoption by Caesar through sexual favours, though Suetonius describes Antony's accusation as political slander. This form of slander was popular during this time in the Roman Republic to demean and discredit political opponents by accusing them of having an inappropriate sexual affair. After landing at Lupiae near Brundisium, Octavius learned the contents of Caesar's will, and only then did he decide to become Caesar's political heir as well as heir to two-thirds of his estate. Upon his adoption, Octavius assumed his great-uncle's name Gaius Julius Caesar. Roman citizens adopted into a new family usually retained their old nomen in cognomen form (e.g., Octavianus for one who had been an Octavius, Aemilianus for one who had been an Aemilius, etc.). However, though some of his contemporaries did, there is no evidence that Octavius officially used the name Octavianus, as it would have made his modest origins too obvious. Historians usually refer to the new Caesar as Octavian during the time between his adoption and his assumption of the name Augustus in 27 BC in order to avoid confusing the dead dictator with his heir. Octavian could not rely on his limited funds to make a successful entry into the upper echelons of the Roman political hierarchy. After a warm welcome by Caesar's soldiers at Brundisium, Octavian demanded a portion of the funds that were allotted by Caesar for the intended war against the Parthian Empire in the Middle East. This amounted to 700 million sesterces stored at Brundisium, the staging ground in Italy for military operations in the east. A later senatorial investigation into the disappearance of the public funds took no action against Octavian since he subsequently used that money to raise troops against the Senate's arch enemy Mark Antony. Octavian made another bold move in 44 BC when, without official permission, he appropriated the annual tribute that had been sent from Rome's Near Eastern province to Italy. Octavian began to bolster his personal forces with Caesar's veteran legionaries and with troops designated for the Parthian war, gathering support by emphasizing his status as heir to Caesar. On his march to Rome through Italy, Octavian's presence and newly acquired funds attracted many, winning over Caesar's former veterans stationed in Campania. By June, he had gathered an army of 3,000 loyal veterans, paying each a salary of 500 denarii. Growing tensions Arriving in Rome on 6 May 44 BC, Octavian found consul Mark Antony, Caesar's former colleague, in an uneasy truce with the dictator's assassins. They had been granted a general amnesty on 17 March, yet Antony had succeeded in driving most of them out of Rome with an inflammatory eulogy at Caesar's funeral, mounting public opinion against the assassins. Mark Antony was amassing political support, but Octavian still had the opportunity to rival him as the leading member of the faction supporting Caesar. Antony had lost the support of many Romans and supporters of Caesar when he initially opposed the motion to elevate Caesar to divine status. It is alleged that Antony refused to handover the money due Octavian as Caesar's adopted heir, however Ronald Syme casts doubt on this saying that 'invective asserts and history repeats' such a fact. During the summer, he managed to win support from Caesarian sympathizers and also made common with the optimates, the former enemies of Caesar, who saw him as the lesser evil and hoped to manipulate him. In September, the leading optimate orator Marcus Tullius Cicero began to attack Antony in a series of speeches portraying him as a threat to the republican order. First conflict with Antony With opinion in Rome turning against him and his year of consular power nearing its end, Antony attempted to pass laws that would assign him the province of Cisalpine Gaul. Octavian meanwhile built up a private army in Italy by recruiting Caesarian veterans, and on 28 November he won over two of Antony's legions with the enticing offer of monetary gain. In the face of Octavian's large and capable force, Antony saw the danger of staying in Rome and, to the relief of the Senate, he left Rome for Cisalpine Gaul, which was to be handed to him on 1 January. However, the province had earlier been assigned to Decimus Junius Brutus Albinus, one of Caesar's assassins, who now refused to yield to Antony. Antony besieged him at Mutina and rejected the resolutions passed by the Senate to stop the fighting. The Senate had no army to enforce their resolutions. This provided an opportunity for Octavian, who already was known to have armed forces. Cicero also defended Octavian against Antony's taunts about Octavian's lack of noble lineage and aping of Julius Caesar's name, stating "we have no more brilliant example of traditional piety among our youth." At the urging of Cicero, the Senate inducted Octavian as senator on 1 January 43 BC, yet he also was given the power to vote alongside the former consuls. In addition, Octavian was granted imperium pro praetore (commanding power) which legalized his command of troops, sending him to relieve the siege along with Hirtius and Pansa (the consuls for 43 BC). He assumed the fasces on 7 January, a date that he would later commemorate as the beginning of his public career. Antony's forces were defeated at the battles of Forum Gallorum (14 April) and Mutina (21 April), forcing Antony to retreat to Transalpine Gaul. Both consuls were killed, however, leaving Octavian in sole command of their armies. The Senate heaped many more rewards on Decimus Brutus than on Octavian for defeating Antony, then attempted to give command of the consular legions to Decimus Brutus. In response, Octavian stayed in the Po Valley and refused to aid any further offensive against Antony. In July, an embassy of centurions sent by Octavian entered Rome and demanded the consulship left vacant by Hirtius and Pansa and also that the decree should be rescinded which declared Antony a public enemy. When this was refused, he marched on the city with eight legions. He encountered no military opposition in Rome and on 19 August 43 BC was elected consul with his relative Quintus Pedius as co-consul. Meanwhile, Antony formed an alliance with Marcus Aemilius Lepidus, another leading Caesarian. Second Triumvirate Proscriptions In a meeting near Bologna in October 43 BC, Octavian, Antony, and Lepidus formed the Second Triumvirate. Their powers were officialized by the Senate on 27 November. This explicit arrogation of special powers lasting five years was then legalised by law passed by the plebs, unlike the unofficial First Triumvirate formed by Pompey, Julius Caesar, and Marcus Licinius Crassus. The triumvirs then set in motion proscriptions, in which between 130 and 300 senators and 2,000 equites were branded as outlaws and deprived of their property and, for those who failed to escape, their lives. This decree issued by the triumvirate was motivated in part by a need to raise money to pay the salaries of their troops for the upcoming conflict against Caesar's assassins, Marcus Junius Brutus and Gaius Cassius Longinus. Rewards for their arrest gave incentive for Romans to capture those proscribed, while the assets and properties of those arrested were seized by the triumvirs. Contemporary Roman historians provide conflicting reports as to which triumvir was most responsible for the proscriptions and killing. However, the sources agree that enacting the proscriptions was a means by all three factions to eliminate political enemies. Marcus Velleius Paterculus asserted that Octavian tried to avoid proscribing officials whereas Lepidus and Antony were to blame for initiating them. Cassius Dio defended Octavian as trying to spare as many as possible, whereas Antony and Lepidus, being older and involved in politics longer, had many more enemies to deal with. This claim was rejected by Appian, who maintained that Octavian shared an equal interest with Lepidus and Antony in eradicating his enemies. Suetonius said that Octavian was reluctant to proscribe officials but did pursue his enemies with more vigor than the other triumvirs. Plutarch described the proscriptions as a ruthless and cutthroat swapping of friends and family among Antony, Lepidus, and Octavian. For example, Octavian allowed the proscription of his ally Cicero, Antony the proscription of his maternal uncle Lucius Julius Caesar (the consul of 64 BC), and Lepidus his brother Paullus. Battle of Philippi and division of territory On 1 January 42 BC, the Senate posthumously recognized Julius Caesar as a divinity of the Roman state, divus Iulius. Octavian was able to further his cause by emphasizing the fact that he was divi filius, "Son of the Divine". Antony and Octavian then sent 28 legions by sea to face the armies of Brutus and Cassius, who had built their base of power in Greece. After two battles at Philippi in Macedonia in October 42, the Caesarian army was victorious and Brutus and Cassius committed suicide. Mark Antony later used the examples of these battles as a means to belittle Octavian, as both battles were decisively won with the use of Antony's forces. In addition to claiming responsibility for both victories, Antony branded Octavian as a coward for handing over his direct military control to Marcus Vipsanius Agrippa instead. After Philippi, a new territorial arrangement was made among the members of the Second Triumvirate. Gaul and the province of Hispania were placed in the hands of Octavian. Antony traveled east to Egypt where he allied himself with Queen Cleopatra, the former lover of Julius Caesar and mother of Caesar's son Caesarion. Lepidus was left with the province of Africa, stymied by Antony, who conceded Hispania to Octavian instead. Octavian was left to decide where in Italy to settle the tens of thousands of veterans of the Macedonian campaign, whom the triumvirs had promised to discharge. The tens of thousands who had fought on the republican side with Brutus and Cassius could easily ally with a political opponent of Octavian if not appeased, and they also required land. There was no more government-controlled land to allot as settlements for their soldiers, so Octavian had to choose one of two options: alienating many Roman citizens by confiscating their land, or alienating many Roman soldiers who could mount a considerable opposition against him in the Roman heartland. Octavian chose the former. There were as many as eighteen Roman towns affected by the new settlements, with entire populations driven out or at least given partial evictions. Rebellion and marriage alliances There was widespread dissatisfaction with Octavian over these settlements of his soldiers, and this encouraged many to rally at the side of Lucius Antonius, who was brother of Mark Antony and supported by a majority in the Senate. Meanwhile, Octavian asked for a divorce from Claudia, the daughter of Fulvia (Antony's wife) and her first husband Publius Clodius Pulcher. He returned Claudia to her mother, claiming that their marriage had never been consummated. Fulvia decided to take action. Together with Lucius Antonius, she raised an army in Italy to fight for Antony's rights against Octavian. Lucius and Fulvia took a political and martial gamble in opposing Octavian, however, since the Roman army still depended on the triumvirs for their salaries. Lucius and his allies ended up in a defensive siege at Perusia (modern Perugia), where Octavian forced them into surrender in early 40 BC. Lucius and his army were spared because of his kinship with Antony, the strongman of the East, while Fulvia was exiled to Sicyon. Octavian showed no mercy, however, for the mass of allies loyal to Lucius; on 15 March, the anniversary of Julius Caesar's assassination, he had 300 Roman senators and equestrians executed for allying with Lucius. Perusia also was pillaged and burned as a warning for others. This bloody event sullied Octavian's reputation and was criticized by many, such as Augustan poet Sextus Propertius. Sextus Pompeius, the son of Pompey and still a renegade general following Julius Caesar's victory over his father, had established himself in Sicily and Sardinia as part of an agreement reached with the Second Triumvirate in 39 BC. Both Antony and Octavian were vying for an alliance with Pompeius. Octavian succeeded in a temporary alliance in 40 BC when he married Scribonia, a sister or daughter of Pompeius's father-in-law Lucius Scribonius Libo. Scribonia gave birth to Octavian's only natural child, Julia, the same day that he divorced her to marry Livia Drusilla, little more than a year after their marriage. While in Egypt, Antony had been engaged in an affair with Cleopatra and had fathered twin children with her. Aware of his deteriorating relationship with Octavian, Antony left Cleopatra; he sailed to Italy in 40 BC with a large force to oppose Octavian, laying siege to Brundisium. This new conflict proved untenable for both Octavian and Antony, however. Their centurions, who had become important figures politically, refused to fight because of their Caesarian cause, while the legions under their command followed suit. Meanwhile, in Sicyon, Antony's wife Fulvia died of a sudden illness while Antony was en route to meet her. Fulvia's death and the mutiny of their centurions allowed the two remaining triumvirs to effect a reconciliation. In the autumn of 40, Octavian and Antony approved the Treaty of Brundisium, by which Lepidus would remain in Africa, Antony in the East, Octavian in the West. The Italian Peninsula was left open to all for the recruitment of soldiers, but in reality this provision was useless for Antony in the East. To further cement relations of alliance with Antony, Octavian gave his sister, Octavia Minor, in marriage to Antony in late 40 BC. War with Pompeius Sextus Pompeius threatened Octavian in Italy by denying shipments of grain through the Mediterranean Sea to the peninsula. Pompeius's own son was put in charge as naval commander in the effort to cause widespread famine in Italy. Pompeius's control over the sea prompted him to take on the name Neptuni filius, "son of Neptune". A temporary peace agreement was reached in 39 BC with the Pact of Misenum; the blockade on Italy was lifted once Octavian granted Pompeius Sardinia, Corsica, Sicily, and the Peloponnese, and ensured him a future position as consul for 35 BC. The territorial agreement between the triumvirate and Sextus Pompeius began to crumble once Octavian divorced Scribonia and married Livia on 17 January 38 BC. One of Pompeius's naval commanders betrayed him and handed over Corsica and Sardinia to Octavian. Octavian lacked the resources to confront Pompeius alone, so an agreement was reached with the Second Triumvirate's extension for another five-year period beginning in 37 BC. In supporting Octavian, Antony expected to gain support for his own campaign against the Parthian Empire, desiring to avenge Rome's defeat at Carrhae in 53 BC. In an agreement reached at Tarentum, Antony provided 120 ships for Octavian to use against Pompeius, while Octavian was to send 20,000 legionaries to Antony for use against Parthia. Octavian sent only a tenth of those promised, which Antony viewed as an intentional provocation. Octavian and Lepidus launched a joint operation against Sextus in Sicily in 36 BC. Despite setbacks for Octavian, the naval fleet of Sextus Pompeius was almost entirely destroyed on 3 September by General Agrippa at the naval battle of Naulochus. Sextus fled to the east with his remaining forces, where he was captured and executed in Miletus by one of Antony's generals the following year. As Lepidus and Octavian accepted the surrender of Pompeius's troops, Lepidus attempted to claim Sicily for himself, ordering Octavian to leave. Lepidus's troops deserted him, however, and defected to Octavian since they were weary of fighting and were enticed by Octavian's promises of money. Lepidus surrendered to Octavian and was permitted to retain the office of pontifex maximus (head of the college of priests) but was ejected from the Triumvirate. His public career at an end, he effectively was exiled to a villa at Cape Circei in Italy. The Roman dominions were divided between Octavian in the West and Antony in the East. Octavian ensured Rome's citizens of their rights to property in order to maintain peace and stability in his portion of the empire. This time, he settled his discharged soldiers outside of Italy, while also returning 30,000 slaves to their former Roman owners—slaves who had fled to join Pompeius's army and navy. Octavian had the Senate grant him, his wife, and his sister tribunal immunity, or sacrosanctitas, in order to ensure his own safety and that of Livia and Octavia once he returned to Rome. War with Antony and Cleopatra Meanwhile, Antony's campaign turned disastrous against Parthia, tarnishing his image as a leader, and the mere 2,000 legionaries sent by Octavian to Antony were hardly enough to replenish his forces. On the other hand, Cleopatra could restore his army to full strength; he already was engaged in a romantic affair with her, so he decided to send Octavia back to Rome. Octavian used this to spread propaganda implying that Antony was becoming less than Roman because he rejected a legitimate Roman spouse for an "Oriental paramour". In 36 BC, Octavian used a political ploy to make himself look less autocratic and Antony more the villain by proclaiming that the civil wars were coming to an end and that he would step down as triumvir—if only Antony would do the same. Antony refused. Roman troops captured the Kingdom of Armenia in 34 BC, and Antony made his son Alexander Helios the ruler of Armenia. He also awarded the title "Queen of Kings" to Cleopatra, acts that Octavian used to convince the Roman Senate that Antony had ambitions to diminish the preeminence of Rome. Octavian became consul once again on 1 January 33 BC, and he opened the following session in the Senate with a vehement attack on Antony's grants of titles and territories to his relatives and to his queen. The breach between Antony and Octavian prompted a large portion of the senators, as well as both of that year's consuls, to leave Rome and defect to Antony. However, Octavian received two key deserters from Antony in the autumn of 32 BC: Munatius Plancus and Marcus Titius. These defectors gave Octavian the information that he needed to confirm with the Senate all the accusations that he made against Antony. Octavian forcibly entered the temple of the Vestal Virgins and seized Antony's secret will, which he promptly publicized. The will would have given away Roman-conquered territories as kingdoms for his sons to rule and designated Alexandria as the site for a tomb for him and his queen. In late 32 BC, the Senate officially revoked Antony's powers as consul and declared war on Cleopatra's regime in Egypt. In early 31 BC, Antony and Cleopatra were temporarily stationed in Greece when Octavian gained a preliminary victory: the navy successfully ferried troops across the Adriatic Sea under the command of Agrippa. Agrippa cut off Antony and Cleopatra's main force from their supply routes at sea, while Octavian landed on the mainland opposite the island of Corcyra (modern Corfu) and marched south. Trapped on land and sea, deserters of Antony's army fled to Octavian's side daily while Octavian's forces were comfortable enough to make preparations. Antony's fleet sailed through the bay of Actium on the western coast of Greece in a desperate attempt to break free of the naval blockade. It was there that Antony's fleet faced the much larger fleet of smaller, more maneuverable ships under commanders Agrippa and Gaius Sosius in the Battle of Actium on 2 September 31 BC. Antony and his remaining forces were spared by a last-ditch effort from Cleopatra's fleet that had been waiting nearby. Octavian pursued them and defeated their forces in Alexandria on 1 August 30 BC—after which Antony and Cleopatra committed suicide. Antony fell on his own sword and was taken by his soldiers back to Alexandria where he died in Cleopatra's arms. Cleopatra died soon after, reputedly by the venomous bite of an asp or by poison. Octavian had exploited his position as Caesar's heir to further his own political career, and he was well aware of the dangers in allowing another person to do the same. He therefore followed the advice of Arius Didymus that "two Caesars are one too many", ordering Caesarion killed while sparing Cleopatra's children by Antony, with the exception of Antony's older son. Octavian had previously shown little mercy to surrendered enemies and acted in ways that had proven unpopular with the Roman people, yet he was given credit for pardoning many of his opponents after the Battle of Actium. Sole ruler of Rome After Actium and the defeat of Antony and Cleopatra, Octavian was in a position to rule the entire republic under an unofficial principate—but he had to achieve this through incremental power gains. He did so by courting the Senate and the people while upholding the republican traditions of Rome, appearing that he was not aspiring to dictatorship or monarchy. Marching into Rome, Octavian and Agrippa were elected as consuls by the Senate. Years of civil war had left Rome in a state of near lawlessness, but the republic was not prepared to accept the control of Octavian as a despot. At the same time, Octavian could not give up his authority without risking further civil wars among the Roman generals, and even if he desired no position of authority his position demanded that he look to the well-being of the city of Rome and the Roman provinces. Octavian's aims from this point forward were to return Rome to a state of stability, traditional legality, and civility by lifting the overt political pressure imposed on the courts of law and ensuring free elections—in name at least. First settlement On 13 January 27 BC, Octavian made a show of returning full power to the Roman Senate and relinquishing his control of the Roman provinces and their armies. Under his consulship, however, the Senate had little power in initiating legislation by introducing bills for senatorial debate. Octavian was no longer in direct control of the provinces and their armies, but he retained the loyalty of active duty soldiers and veterans alike. The careers of many clients and adherents depended on his patronage, as his financial power was unrivaled in the Roman Republic. Historian Werner Eck states: To a large extent, the public was aware of the vast financial resources that Octavian commanded. He failed to encourage enough senators to finance the building and maintenance of networks of roads in Italy in 20 BC, but he undertook direct responsibility for them. This was publicized on the Roman currency issued in 16 BC, after he donated vast amounts of money to the aerarium Saturni, the public treasury. According to historian H. H. Scullard, however, Octavian's power was based on the exercise of "a predominant military power and ... the ultimate sanction of his authority was force, however much the fact was disguised." The Senate proposed to Octavian, the victor of Rome's civil wars, that he once again assume command of the provinces. The Senate's proposal was a ratification of Octavian's extra-constitutional power. Through the Senate, Octavian was able to continue the appearance of a still-functional constitution. Feigning reluctance, he accepted a ten-year responsibility of overseeing provinces that were considered chaotic. The provinces ceded to Augustus for that ten-year period comprised much of the conquered Roman world, including all of Hispania and Gaul, Syria, Cilicia, Cyprus, and Egypt. Moreover, command of these provinces provided Octavian with control over the majority of Rome's legions. While Octavian acted as consul in Rome, he dispatched senators to the provinces under his command as his representatives to manage provincial affairs and ensure that his orders were carried out. The provinces not under Octavian's control were overseen by governors chosen by the Roman Senate. Octavian became the most powerful political figure in the city of Rome and in most of its provinces, but he did not have a monopoly on political and martial power. The Senate still controlled North Africa, an important regional producer of grain, as well as Illyria and Macedonia, two strategic regions with several legions. However, the Senate had control of only five or six legions distributed among three senatorial proconsuls, compared to the twenty legions under the control of Octavian, and their control of these regions did not amount to any political or military challenge to Octavian. The Senate's control over some of the Roman provinces helped maintain a republican façade for the autocratic principate. Also, Octavian's control of entire provinces followed republican-era precedents for the objective of securing peace and creating stability, in which such prominent Romans as Pompey had been granted similar military powers in times of crisis and instability. Change to Augustus On 16 January 27 BC the Senate gave Octavian the titles of augustus and princeps. Augustus is from the Latin word augere (meaning to increase) and can be translated as "the illustrious one". It was a title of religious authority rather than political authority. His name of Augustus was also more favorable than Romulus, the previous one which he styled for himself in reference to the story of the legendary founder of Rome, which symbolized a second founding of Rome. The title of Romulus was associated too strongly with notions of monarchy and kingship, an image that Octavian tried to avoid. The title princeps senatus originally meant the member of the Senate with the highest precedence, but in this case it became an almost regnal title for a leader who was first in charge. The name augustus was inherited by all future emperors, eventually becoming, at least in practice, the main title of the emperor. As a result, modern historians usually regard this event as the beginning of Augustus' reign as "emperor". Augustus also styled himself as Imperator Caesar divi filius, "Commander Caesar son of the deified one". With this title, he boasted his familial link to deified Julius Caesar, and the use of imperator signified a permanent link to the Roman tradition of victory. He transformed Caesar, a cognomen for one branch of the Julian family, into a new family line that began with him. Augustus was granted the right to hang the corona civica (civic crown) above his door and to have laurels drape his doorposts. However, he renounced flaunting insignia of power such as holding a scepter, wearing a diadem, or wearing the golden crown and purple toga of his predecessor Julius Caesar. If he refused to symbolize his power by donning and bearing these items on his person, the Senate nonetheless awarded him with a golden shield displayed in the meeting hall of the Curia, bearing the inscription virtus, pietas, clementia, iustitia—"valor, piety, clemency, and justice." Second settlement By 23 BC, some of the un-republican implications were becoming apparent concerning the settlement of 27 BC. Augustus's retention of an annual consulate drew attention to his de facto dominance over the Roman political system and cut in half the opportunities for others to achieve what was still nominally the preeminent position in the Roman state. Further, he was causing political problems by desiring to have his nephew Marcus Claudius Marcellus follow in his footsteps and eventually assume the principate in his turn, alienating his three greatest supporters: Agrippa, Maecenas, and Livia. He appointed noted republican Calpurnius Piso (who had fought against Julius Caesar and supported Cassius and Brutus) as co-consul in 23 BC, after his choice Aulus Terentius Varro Murena died unexpectedly. In the late spring Augustus had a severe illness and on his supposed deathbed made arrangements that would ensure the continuation of the principate in some form, while allaying senators' suspicions of his anti-republicanism. Augustus prepared to hand down his signet ring to his favored general Agrippa. However, Augustus handed over to his co-consul Piso all of his official documents, an account of public finances, and authority over listed troops in the provinces while Augustus's supposedly favored nephew Marcellus came away empty-handed. This was a surprise to many who believed Augustus would have named an heir to his position as an unofficial emperor. Augustus bestowed only properties and possessions to his designated heirs, as an obvious system of institutionalized imperial inheritance would have provoked resistance and hostility among the republican-minded Romans fearful of monarchy. With regards to the principate, it was obvious to Augustus that Marcellus was not ready to take on his position; nonetheless, by giving his signet ring to Agrippa, Augustus intended to signal to the legions that Agrippa was to be his successor and that they should continue to obey Agrippa, constitutional procedure notwithstanding. Soon after his bout of illness subsided, Augustus gave up his consulship. The only other times Augustus would serve as consul would be in the years 5 and 2 BC, both times to introduce his grandsons into public life. This was a clever ploy by Augustus; ceasing to serve as one of two annually elected consuls allowed aspiring senators a better chance to attain the consular position while allowing Augustus to exercise wider patronage within the senatorial class. Although Augustus had resigned as consul, he desired to retain his consular imperium not just in his provinces but throughout the empire. This desire, as well as the Marcus Primus affair, led to a second compromise between him and the Senate known as the second settlement. The primary reasons for the second settlement were as follows. First, after Augustus relinquished the annual consulship, he was no longer in an official position to rule the state, yet his dominant position remained unchanged over his Roman, 'imperial' provinces where he was still a proconsul. When he annually held the office of consul, he had the power to intervene with the affairs of the other provincial proconsuls appointed by the Senate throughout the empire, when he deemed necessary. A second problem later arose showing the need for the second settlement in what became known as the "Marcus Primus affair". In late 24 or early 23 BC, charges were brought against Marcus Primus, the former proconsul (governor) of Macedonia, for waging a war without prior approval of the Senate on the Odrysian kingdom of Thrace, whose king was a Roman ally. He was defended by Lucius Licinius Varro Murena who told the trial that his client had received specific instructions from Augustus ordering him to attack the client state. Later, Primus testified that the orders came from the recently deceased Marcellus. Such orders, had they been given, would have been considered a breach of the Senate's prerogative under the constitutional settlement of 27 BC and its aftermath—i.e., before Augustus was granted imperium proconsulare maius—as Macedonia was a senatorial province under the Senate's jurisdiction, not an imperial province under the authority of Augustus. Such an action would have ripped away the veneer of republican restoration as promoted by Augustus, and exposed his fraud of merely being the first citizen, a first among equals. Even worse, the involvement of Marcellus provided some measure of proof that Augustus's policy was to have the youth take his place as princeps, instituting a form of monarchy – accusations that had already played out. The situation was so serious that Augustus appeared at the trial even though he had not been called as a witness. Under oath, Augustus declared that he gave no such order. Murena disbelieved Augustus's testimony and resented his attempt to subvert the trial by using his auctoritas. He rudely demanded to know why Augustus had turned up to a trial to which he had not been called; Augustus replied that he came in the public interest. Although Primus was found guilty, some jurors voted to acquit, meaning that not everybody believed Augustus's testimony, an insult to the 'August One'. The second settlement was completed in part to allay confusion and formalize Augustus's legal authority to intervene in senatorial provinces. The Senate granted Augustus a form of general imperium proconsulare, or proconsular imperium (power) that applied throughout the empire, not solely to his provinces. Moreover, the Senate augmented Augustus's proconsular imperium into imperium proconsulare maius, or proconsular imperium applicable throughout the empire that was more (maius) or greater than that held by the other proconsuls. This in effect gave Augustus constitutional power superior to all other proconsuls in the empire. Augustus stayed in Rome during the renewal process and provided veterans with lavish donations to gain their support, thereby ensuring that his status of proconsular imperium maius was renewed in 13 BC. Additional powers During the second settlement, Augustus was also granted the power of a tribune (tribunicia potestas) for life, though not the official title of tribune. For some years, Augustus had been awarded tribunicia sacrosanctitas, the immunity given to a tribune of the plebs. Now he decided to assume the full powers of the magistracy, renewed annually, in perpetuity. Legally, it was closed to patricians, a status that Augustus had acquired some years earlier when adopted by Julius Caesar. This power allowed him to convene the Senate and people at will and lay business before them, to veto the actions of either the Assembly or the Senate, to preside over elections, and to speak first at any meeting. Also included in Augustus's tribunician authority were powers usually reserved for the Roman censor; these included the right to supervise public morals and scrutinize laws to ensure that they were in the public interest, as well as the ability to hold a census and determine the membership of the Senate. With the powers of a censor, Augustus appealed to virtues of Roman patriotism by banning all attire but the classic toga while entering the Forum. There was no precedent within the Roman system for combining the powers of the tribune and the censor into a single position, nor was Augustus ever elected to the office of censor. Julius Caesar had been granted similar powers, wherein he was charged with supervising the morals of the state. However, this position did not extend to the censor's ability to hold a census and determine the Senate's roster. The office of the tribunus plebis began to lose its prestige due to Augustus's amassing of tribunal powers, so he revived its importance by making it a mandatory appointment for any plebeian desiring the praetorship. Augustus was granted sole imperium within the city of Rome in addition to being granted proconsular imperium maius and tribunician authority for life. Traditionally, proconsuls (Roman province governors) lost their proconsular "imperium" when they crossed the Pomerium—the sacred boundary of Rome—and entered the city. In these situations, Augustus would have power as part of his tribunician authority, but his constitutional imperium within the Pomerium would be less than that of a serving consul, which meant that when he was in the city he might not be the constitutional magistrate with the most authority. Thanks to his prestige or auctoritas, his wishes would usually be obeyed, but there might be some difficulty. To fill this power vacuum, the Senate voted that Augustus's imperium proconsulare maius (superior proconsular power) should not lapse when he was inside the city walls. All armed forces in the city had formerly been under the control of the urban praetors and consuls, but this situation now placed them under the sole authority of Augustus. In addition, the credit was given to Augustus for each subsequent Roman military victory after this time, because the majority of Rome's armies were stationed in imperial provinces commanded by Augustus through the legatus who were deputies of the princeps in the provinces. Moreover, if a battle was fought in a senatorial province, Augustus's proconsular imperium maius allowed him to take command of (or credit for) any major military victory. This meant that Augustus was the only individual able to receive a triumph, a tradition that began with Romulus, Rome's first king and first triumphant general. Lucius Cornelius Balbus was the last man outside Augustus's family to receive this award, in 19 BC. Tiberius, Augustus's eldest stepson by Livia, was the only other general to receive a triumph—for victories in Germania in 7 BC. Normally during republican times, the powers Augustus held even after the second settlement would have been split between several people, who would each exercise them with the assistance of a colleague and for a specific period of time. Augustus held them all at once by himself and with no time limits; even those that nominally had time limits were automatically renewed whenever they lapsed. Conspiracy Many of the political subtleties of the second settlement seem to have evaded the comprehension of the plebeian class, who were Augustus's greatest supporters and clientele. This caused them to insist upon Augustus's participation in imperial affairs from time to time. Augustus failed to stand for election as consul in 22 BC, and fears arose once again that he was being forced from power by the aristocratic Senate. In 22, 21, and 19 BC, the people rioted in response and only allowed a single consul to be elected for each of those years, ostensibly to leave the other position open for Augustus. Likewise, there was a food shortage in Rome in 22 BC which sparked panic, while many urban plebs called for Augustus to take on dictatorial powers to personally oversee the crisis. After a theatrical display of refusal before the Senate, Augustus finally accepted authority over Rome's grain supply "by virtue of his proconsular imperium", and ended the crisis almost immediately. It was not until AD 8 that a food crisis of this sort prompted Augustus to establish a praefectus annonae, a permanent prefect who was in charge of procuring food supplies for Rome. There were some who were concerned by the expansion of powers granted to Augustus by the second settlement, and this came to a head with the apparent conspiracy of Fannius Caepio. Some time prior to 1 September 22 BC, a certain Castricius provided Augustus with information about a conspiracy led by Fannius Caepio. Murena, the outspoken consul who defended Primus in the Marcus Primus affair, was named among the conspirators. The conspirators were tried in absentia with Tiberius acting as prosecutor; the jury found them guilty, but it was not a unanimous verdict. All the accused were sentenced to death for treason and executed as soon as they were captured—without ever giving testimony in their defence. Augustus ensured that the facade of Republican government continued with an effective cover-up of the events. In 19 BC, the Senate granted Augustus a form of "general consular imperium", which was probably imperium consulare maius, like the proconsular powers that he received in 23 BC. Like his tribune authority, the consular powers were another instance of gaining power from offices that he did not actually hold. In addition, Augustus was allowed to wear the consul's insignia in public and before the Senate, as well as to sit in the symbolic chair between the two consuls and hold the fasces, an emblem of consular authority. This seems to have assuaged the populace; regardless of whether or not Augustus was a consul, the importance was that he both appeared as one before the people and could exercise consular power if necessary. On 6 March 12 BC, after the death of Lepidus, he additionally took up the position of pontifex maximus, the high priest of the college of the pontiffs, the most important position in Roman religion. On 5 February 2 BC, Augustus was also given the title pater patriae, or "father of the country". Stability and staying power A final reason for the second settlement was to give the principate constitutional stability and staying power in case something happened to Princeps Augustus. His illness of early 23 BC and the Caepio conspiracy showed that the regime's existence hung by the thin thread of the life of one man, Augustus himself, who had several severe and dangerous illnesses throughout his life. If he were to die from natural causes or fall victim to assassination, Rome could be subjected to another round of civil war. The memories of Pharsalus, the Ides of March, the proscriptions, Philippi, and Actium, barely twenty-five years distant, were still vivid in the minds of many citizens. Proconsular imperium was conferred upon Agrippa for five years, similar to Augustus's power, in order to accomplish this constitutional stability. The exact nature of the grant is uncertain but it probably covered Augustus's imperial provinces, east and west, perhaps lacking authority over the provinces of the Senate. That came later, as did the jealously guarded tribunicia potestas. Augustus's accumulation of powers was now complete. War and expansion Augustus chose Imperator ("victorious commander") to be his first name, since he wanted to make an emphatically clear connection between himself and the notion of victory, and consequently became known as Imperator Caesar Divi Filius Augustus. By AD 13, Augustus boasted 21 occasions where his troops proclaimed "imperator" as his title after a successful battle. Almost the entire fourth chapter in his publicly released memoirs of achievements known as the Res Gestae is devoted to his military victories and honors. Augustus also promoted the ideal of a superior Roman civilization with a task of ruling the world (to the extent to which the Romans knew it), a sentiment embodied in words that the contemporary poet Virgil attributes to a legendary ancestor of Augustus: tu regere imperio populos, Romane, memento—"Roman, remember by your strength to rule the Earth's peoples!" The impulse for expansionism was apparently prominent among all classes at Rome, and it is accorded divine sanction by Virgil's Jupiter in Book 1 of the Aeneid, where Jupiter promises Rome imperium sine fine, "sovereignty without end". By the end of his reign, the armies of Augustus had conquered northern Hispania (modern Spain and Portugal) and the Alpine regions of Raetia and Noricum (modern Switzerland, Bavaria, Austria, Slovenia), Illyricum and Pannonia (modern Albania, Croatia, Hungary, Serbia, etc.), and had extended the borders of Africa Proconsularis to the east and south. Judea was added to the province of Syria when Augustus deposed Herod Archelaus, successor to client king Herod the Great. Syria (like Egypt after Antony) was governed by a high prefect of the equestrian class rather than by a proconsul or legate of Augustus. Again, no military effort was needed in 25 BC when Galatia (modern Turkey) was converted to a Roman province shortly after Amyntas of Galatia was killed by an avenging widow of a slain prince from Homonada. The rebellious tribes of Asturias and Cantabria in modern-day Spain were finally quelled in 19 BC, and the territory fell under the provinces of Hispania and Lusitania. This region proved to be a major asset in funding Augustus's future military campaigns, as it was rich in mineral deposits that could be fostered in Roman mining projects, especially the very rich gold deposits at Las Médulas. Conquering the peoples of the Alps in 16 BC was another important victory for Rome, since it provided a large territorial buffer between the Roman citizens of Italy and Rome's enemies in Germania to the north. Horace dedicated an ode to the victory, while the monumental Trophy of Augustus near Monaco was built to honor the occasion. The capture of the Alpine region also served the next offensive in 12 BC, when Tiberius began the offensive against the Pannonian tribes of Illyricum, and his brother Nero Claudius Drusus moved against the Germanic tribes of the eastern Rhineland. Both campaigns were successful, as Drusus's forces reached the Elbe River by 9 BC—though he died shortly after by falling off his horse. It was recorded that the pious Tiberius walked in front of his brother's body all the way back to Rome. To protect Rome's eastern territories from the Parthian Empire, Augustus relied on the client states of the east to act as territorial buffers and areas that could raise their own troops for defense. To ensure security of the empire's eastern flank, Augustus stationed a Roman army in Syria, while his skilled stepson Tiberius negotiated with the Parthians as Rome's diplomat to the East. Tiberius was responsible for restoring Tigranes V to the throne of the Kingdom of Armenia. Arguably his greatest diplomatic achievement was negotiating with Phraates IV of Parthia (37–2 BC) in 20 BC for the return of the battle standards lost by Crassus in the Battle of Carrhae, a symbolic victory and great boost of morale for Rome. Werner Eck claims that this was a great disappointment for Romans seeking to avenge Crassus's defeat by military means. However, Maria Brosius explains that Augustus used the return of the standards as propaganda symbolizing the submission of Parthia to Rome. The event was celebrated in art such as the breastplate design on the statue Augustus of Prima Porta and in monuments such as the Temple of Mars Ultor ('Mars the Avenger') built to house the standards. Parthia had always posed a threat to Rome in the east, but the real battlefront was along the Rhine and Danube rivers. Before the final fight with Antony, Octavian's campaigns against the tribes in Dalmatia were the first step in expanding Roman dominions to the Danube. Victory in battle was not always a permanent success, as newly conquered territories were constantly retaken by Rome's enemies in Germania. A prime example of Roman loss in battle was the Battle of the Teutoburg Forest in AD 9, where three entire legions led by Publius Quinctilius Varus were destroyed by Arminius, leader of the Cherusci, an apparent Roman ally. Augustus retaliated by dispatching Tiberius and Drusus to the Rhineland to pacify it, which had some success although the battle brought the end to Roman expansion into Germany. Roman general Germanicus took advantage of a Cherusci civil war between Arminius and Segestes; at the Battle of Idistaviso in AD 16, they defeated Arminius. Death and succession The illness of Augustus in 23 BC brought the problem of succession to the forefront of political issues and the public. To ensure stability, he needed to designate an heir to his unique position in Roman society and government. This was to be achieved in small, undramatic and incremental ways that did not stir senatorial fears of monarchy. If someone was to succeed to Augustus's unofficial position of power, he would have to earn it through his own publicly proven merits. Some Augustan historians argue that indications pointed toward his sister's son Marcellus, who had been quickly married to Augustus's daughter Julia the Elder. Other historians dispute this since Augustus's will was read aloud to the Senate while he was seriously ill in 23 BC, indicating a preference for Marcus Agrippa, who was Augustus's second in charge and arguably the only one of his associates who could have controlled the legions and held the empire together. After the death of Marcellus in 23 BC, Augustus married his daughter to Agrippa. This union produced five children, three sons and two daughters: Gaius Caesar, Lucius Caesar, Vipsania Julia, Agrippina, and Agrippa Postumus, so named because he was born after Marcus Agrippa died. Shortly after the second settlement, Agrippa was granted a five-year term of administering the eastern half of the empire with the imperium of a proconsul and the same tribunicia potestas granted to Augustus (although not trumping Augustus's authority), his seat of governance stationed at Samos in the eastern Aegean. This granting of power showed Augustus's favor for Agrippa, but it was also a measure to please members of his Caesarian party by allowing one of their members to share a considerable amount of power with him. Augustus's intent became apparent to make Gaius and Lucius Caesar his heirs when he adopted them as his own children. He took the consulship in 5 and 2 BC so that he could personally usher them into their political careers, and they were nominated for the consulships of AD 1 and 4. Augustus also showed favor to his stepsons, Livia's children from her first marriage Nero Claudius Drusus Germanicus (henceforth referred to as Drusus) and Tiberius Claudius (henceforth Tiberius), granting them military commands and public office, though seeming to favor Drusus. After Agrippa died in 12 BC, Tiberius was ordered to divorce his own wife Vipsania Agrippina and marry Agrippa's widow, Augustus's daughter Julia—as soon as a period of mourning for Agrippa had ended. Drusus's marriage to Augustus's niece Antonia was considered an unbreakable affair, whereas Vipsania was "only" the daughter of the late Agrippa from his first marriage. Tiberius shared in Augustus's tribune powers as of 6 BC but shortly thereafter went into retirement, reportedly wanting no further role in politics while he exiled himself to Rhodes. No specific reason is known for his departure, though it could have been a combination of reasons, including a failing marriage with Julia as well as a sense of envy and exclusion over Augustus's apparent favouring of his young grandchildren-turned-sons Gaius and Lucius. (Gaius and Lucius joined the college of priests at an early age, were presented to spectators in a more favorable light, and were introduced to the army in Gaul.) After the deaths of both Lucius and Gaius in AD 2 and 4 respectively, and the earlier death of his brother Drusus (9 BC), Tiberius was recalled to Rome in June AD 4, where he was adopted by Augustus on the condition that he, in turn, adopt his nephew Germanicus. This continued the tradition of presenting at least two generations of heirs. In that year, Tiberius was also granted the powers of a tribune and proconsul, emissaries from foreign kings had to pay their respects to him and by AD 13 was awarded with his second triumph and equal level of imperium with that of Augustus. The only other possible claimant as heir was Agrippa Postumus, who had been exiled by Augustus in AD 7, his banishment made permanent by senatorial decree, and Augustus officially disowned him. He certainly fell out of Augustus's favor as an heir; the historian Erich S. Gruen notes various contemporary sources that state Agrippa Postumus was a "vulgar young man, brutal and brutish, and of depraved character". On 19 August AD 14, Augustus died while visiting Nola where his father had died. Both Tacitus and Cassius Dio wrote that Livia was rumored to have brought about Augustus's death by poisoning fresh figs. This element features in many modern works of historical fiction pertaining to Augustus's life, but some historians view it as likely to have been a salacious fabrication made by those who had favoured Postumus as heir, or other of Tiberius's political enemies. Livia had long been the target of similar rumors of poisoning on the behalf of her son, most or all of which are unlikely to have been true. Alternatively, it is possible that Livia did supply a poisoned fig (she did cultivate a variety of fig named for her that Augustus is said to have enjoyed), but did so as a means of assisted suicide rather than murder. Augustus's health had been in decline in the months immediately before his death, and he had made significant preparations for a smooth transition in power, having at last reluctantly settled on Tiberius as his choice of heir. It is likely that Augustus was not expected to return alive from Nola, but it seems that his health improved once there; it has therefore been speculated that Augustus and Livia conspired to end his life at the anticipated time, having committed all political process to accepting Tiberius, in order to not endanger that transition. Augustus's famous last words were, "Have I played the part well? Then applaud as I exit" ()—referring to the play-acting and regal authority that he had put on as emperor. Publicly, though, his last words were, "Behold, I found Rome of clay, and leave her to you of marble" (). An enormous funerary procession of mourners traveled with Augustus's body from Nola to Rome, and all public and private businesses closed on the day of his burial. Tiberius and his son Drusus delivered the eulogy while standing atop two rostra. Augustus's body was coffin-bound and cremated on a pyre close to his mausoleum. It was proclaimed that Augustus joined the company of the gods as a member of the Roman pantheon. Historian D. C. A. Shotter states that Augustus's policy of favoring the Julian family line over the Claudian might have afforded Tiberius sufficient cause to show open disdain for Augustus after the latter's death; instead, Tiberius was always quick to rebuke those who criticized Augustus. Shotter suggests that Augustus's deification obliged Tiberius to suppress any open resentment that he might have harbored, coupled with Tiberius's "extremely conservative" attitude towards religion. Also, historian R. Shaw-Smith points to letters of Augustus to Tiberius which display affection towards Tiberius and high regard for his military merits. Shotter states that Tiberius focused his anger and criticism on Gaius Asinius Gallus (for marrying Vipsania after Augustus forced Tiberius to divorce her), as well as toward the two young Caesars, Gaius and Lucius—instead of Augustus, the real architect of his divorce and imperial demotion. Legacy Augustus created a regime which maintained peace and prosperity in the Roman west and the Greek east for two centuries. Its dominance also laid the foundations of a concept of universal empire in the Byzantine Empire and the Holy Roman Empires down to their dissolutions in 1453 and 1806, respectively. Both his adoptive surname, Caesar, and his title Augustus became the permanent titles of the rulers of the Roman Empire for fourteen centuries after his death, in use both at Old Rome and at New Rome. In many languages, Caesar became the word for emperor, as in the German Kaiser and in the Bulgarian and subsequently Russian Tsar (sometimes Csar or Czar). The cult of Divus Augustus continued until the state religion of the empire was changed to Christianity in 391 by Theodosius I. Consequently, there are many excellent statues and busts of the first emperor. He had composed an account of his achievements, the Res Gestae Divi Augusti, to be inscribed in bronze in front of his mausoleum. Copies of the text were inscribed throughout the empire upon his death. The inscriptions in Latin featured translations in Greek beside it and were inscribed on many public edifices, such as the temple in Ankara dubbed the Monumentum Ancyranum, called the "queen of inscriptions" by historian Theodor Mommsen. The Res Gestae is the only work to have survived from antiquity, though Augustus is also known to have composed poems entitled Sicily, Epiphanus, and Ajax, an autobiography of 13 books, a philosophical treatise, and a written rebuttal to Brutus's Eulogy of Cato. Historians are able to analyze excerpts of letters penned by Augustus, preserved in other works, to others for additional facts or clues about his personal life. Many consider Augustus to be Rome's greatest emperor; his policies certainly extended the empire's life span and initiated the celebrated Pax Romana or Pax Augusta. The Roman Senate wished subsequent emperors to "be more fortunate than Augustus and better than Trajan". Augustus was intelligent, decisive, and a shrewd politician, but he was not perhaps as charismatic as Julius Caesar and was influenced on occasion by Livia (sometimes for the worse). Nevertheless, his legacy proved more enduring. The city of Rome was utterly transformed under Augustus, with Rome's first institutionalized police force, firefighting force, and the establishment of the municipal prefect as a permanent office. The police force was divided into cohorts of 500 men each, while the units of firemen ranged from 500 to 1,000 men each, with 7 units assigned to 14 divided city sectors. A praefectus vigilum, or "Prefect of the Watch" was put in charge of the vigiles, Rome's fire brigade and police. With Rome's civil wars at an end, Augustus was also able to create a standing army for the Roman Empire, fixed at a size of 28 legions of about 170,000 soldiers. This was supported by numerous auxiliary units of 500 non-citizen soldiers each, often recruited from recently conquered areas. With his finances securing the maintenance of roads throughout Italy, Augustus installed an official courier system of relay stations overseen by a military officer known as the praefectus vehiculorum. Besides the advent of swifter communication among Italian polities, his extensive building of roads throughout Italy also allowed Rome's armies to march swiftly and at an unprecedented pace across the country. In the year 6 Augustus established the aerarium militare, donating 170 million sesterces to the new military treasury that provided for both active and retired soldiers. One of the most enduring institutions of Augustus was the establishment of the Praetorian Guard in 27 BC, originally a personal bodyguard unit on the battlefield that evolved into an imperial guard as well as an important political force in Rome. They had the power to intimidate the Senate, install new emperors, and depose ones they disliked; the last emperor they served was Maxentius, as it was Constantine I who disbanded them in the early 4th century and destroyed their barracks, the Castra Praetoria. Although the most powerful individual in the Roman Empire, Augustus wished to embody the spirit of Republican virtue and norms. He also wanted to relate to and connect with the concerns of the plebs and lay people. He achieved this through various means of generosity and a cutting back of lavish excess. In the year 29 BC, Augustus gave 400 sesterces (equal to 1/10 of a Roman pound of gold) each to 250,000 citizens, 1,000 sesterces each to 120,000 veterans in the colonies, and spent 700 million sesterces in purchasing land for his soldiers to settle upon. He also restored 82 different temples to display his care for the Roman pantheon of deities. In 28 BC, he melted down 80 silver statues erected in his likeness and in honor of him, an attempt of his to appear frugal and modest. The longevity of Augustus's reign and its legacy to the Roman world should not be overlooked as a key factor in its success. As Tacitus wrote, the younger generations alive in AD 14 had never known any form of government other than the principate. Had Augustus died earlier, matters might have turned out differently. The attrition of the civil wars on the old Republican oligarchy and the longevity of Augustus, therefore, must be seen as major contributing factors in the transformation of the Roman state into a de facto monarchy in these years. Augustus's own experience, his patience, his tact, and his political acumen also played their parts. He directed the future of the empire down many lasting paths, from the existence of a standing professional army stationed at or near the frontiers, to the dynastic principle so often employed in the imperial succession, to the embellishment of the capital at the emperor's expense. Augustus's ultimate legacy was the peace and prosperity the Empire enjoyed for the next two centuries under the system he initiated. His memory was enshrined in the political ethos of the Imperial age as a paradigm of the good emperor. Every emperor of Rome adopted his name, Caesar Augustus, which gradually lost its character as a name and eventually became a title. The Augustan era poets Virgil and Horace praised Augustus as a defender of Rome, an upholder of moral justice, and an individual who bore the brunt of responsibility in maintaining the empire. However, for his rule of Rome and establishing the principate, Augustus has also been subjected to criticism throughout the ages. The contemporary Roman jurist Marcus Antistius Labeo, fond of the days of pre-Augustan republican liberty in which he had been born, openly criticized the Augustan regime. In the beginning of his Annals, Tacitus wrote that Augustus had cunningly subverted Republican Rome into a position of slavery. He continued to say that, with Augustus's death and swearing of loyalty to Tiberius, the people of Rome traded one slaveholder for another. Tacitus, however, records two contradictory but common views of Augustus: According to the second opposing opinion: In a 2006 biography on Augustus, Anthony Everitt asserts that through the centuries, judgments on Augustus's reign have oscillated between these two extremes but stresses that: Tacitus was of the belief that Nerva (r. 96–98) successfully "mingled two formerly alien ideas, principate and liberty". The 3rd-century historian Cassius Dio acknowledged Augustus as a benign, moderate ruler, yet like most other historians after the death of Augustus, Dio viewed Augustus as an autocrat. The poet Marcus Annaeus Lucanus (AD 39–65) was of the opinion that Caesar's victory over Pompey and the fall of Cato the Younger (95 BC–46 BC) marked the end of traditional liberty in Rome; historian Chester Starr writes of his avoidance of criticizing Augustus, "perhaps Augustus was too sacred a figure to accuse directly." The Anglo-Irish writer Jonathan Swift (1667–1745), in his Discourse on the Contests and Dissentions in Athens and Rome, criticized Augustus for installing tyranny over Rome, and likened what he believed Great Britain's virtuous constitutional monarchy to Rome's moral Republic of the 2nd century BC. In his criticism of Augustus, the admiral and historian Thomas Gordon (1658–1741) compared Augustus to the puritanical tyrant Oliver Cromwell (1599–1658). Thomas Gordon and the French political philosopher Montesquieu (1689–1755) both remarked that Augustus was a coward in battle. In his Memoirs of the Court of Augustus, the Scottish scholar Thomas Blackwell (1701–1757) deemed Augustus a Machiavellian ruler, "a bloodthirsty vindicative usurper", "wicked and worthless", "a mean spirit", and a "tyrant". Revenue reforms Augustus's public revenue reforms had a great impact on the subsequent success of the Empire. Augustus brought a far greater portion of the Empire's expanded land base under consistent, direct taxation from Rome, instead of exacting varying, intermittent, and somewhat arbitrary tributes from each local province as Augustus's predecessors had done. This reform greatly increased Rome's net revenue from its territorial acquisitions, stabilized its flow, and regularized the financial relationship between Rome and the provinces, rather than provoking fresh resentments with each new arbitrary exaction of tribute. The measures of taxation in the reign of Augustus were determined by population census, with fixed quotas for each province. Citizens of Rome and Italy paid indirect taxes, while direct taxes were exacted from the provinces. Indirect taxes included a 4% tax on the price of slaves, a 1% tax on goods sold at auction, and a 5% tax on the inheritance of estates valued at over 100,000 sesterces by persons other than the next of kin. An equally important reform was the abolition of private tax farming, which was replaced by salaried civil service tax collectors. Private contractors who collected taxes for the State were the norm in the Republican era. Some of them were powerful enough to influence the number of votes for men running for offices in Rome. These tax farmers called publicans were infamous for their depredations, great private wealth, and the right to tax local areas. The use of Egypt's immense land rents to finance the Empire's operations resulted from Augustus's conquest of Egypt and the shift to a Roman form of government. As it was effectively considered Augustus's private property rather than a province of the Empire, it became part of each succeeding emperor's patrimonium. Instead of a legate or proconsul, Augustus installed a prefect from the equestrian class to administer Egypt and maintain its lucrative seaports; this position became the highest political achievement for any equestrian besides becoming Prefect of the Praetorian Guard. The highly productive agricultural land of Egypt yielded enormous revenues that were available to Augustus and his successors to pay for public works and military expeditions. Month of August The month of August (Latin: Augustus) is named after Augustus; until his time it was called Sextilis (named so because it had been the sixth month of the original Roman calendar and the Latin word for six is sex). Commonly repeated lore has it that August has 31 days because Augustus wanted his month to match the length of Julius Caesar's July, but this is an invention of the 13th century scholar Johannes de Sacrobosco. Sextilis in fact had 31 days before it was renamed, and it was not chosen for its length (see Julian calendar). According to a senatus consultum quoted by Macrobius, Sextilis was renamed to honor Augustus because several of the most significant events in his rise to power, culminating in the fall of Alexandria, fell in that month. Creation of "Italia" Roman Italy was established by Augustus in 7 BC with the Latin name "Italia". This was the first time that the Italian peninsula was united administratively and politically under the same name. Due to this act, Augustus was called the Father of Italy by Italian historians such as G. Giannelli. Building projects On his deathbed, Augustus boasted "I found a Rome of bricks; I leave to you one of marble." Although there is some truth in the literal meaning of this, Cassius Dio asserts that it was a metaphor for the Empire's strength. Marble could be found in buildings of Rome before Augustus, but it was not extensively used as a building material until the reign of Augustus. Although this did not apply to the Subura slums, which were still as rickety and fire-prone as ever, he did leave a mark on the monumental topography of the centre and of the Campus Martius, with the Ara Pacis (Altar of Peace) and monumental sundial, whose central gnomon was an obelisk taken from Egypt. The relief sculptures decorating the Ara Pacis visually augmented the written record of Augustus's triumphs in the Res Gestae. Its reliefs depicted the imperial pageants of the praetorians, the Vestals, and the citizenry of Rome. He also built the Temple of Caesar, the Baths of Agrippa, and the Forum of Augustus with its Temple of Mars Ultor. Other projects were either encouraged by him, such as the Theatre of Balbus, and Agrippa's construction of the Pantheon, or funded by him in the name of others, often relations (e.g. Portico of Octavia, Theatre of Marcellus). Even his Mausoleum of Augustus was built before his death to house members of his family. To celebrate his victory at the Battle of Actium, the Arch of Augustus was built in 29 BC near the entrance of the Temple of Castor and Pollux, and widened in 19 BC to include a triple-arch design. After the death of Agrippa in 12 BC, a solution had to be found in maintaining Rome's water supply system. This came about because it was overseen by Agrippa when he served as aedile, and was even funded by him afterwards when he was a private citizen paying at his own expense. In that year, Augustus arranged a system where the Senate designated three of its members as prime commissioners in charge of the water supply and to ensure that Rome's aqueducts did not fall into disrepair. In the late Augustan era, the commission of five senators called the curatores locorum publicorum iudicandorum (translated as "Supervisors of Public Property") was put in charge of maintaining public buildings and temples of the state cult. Augustus created the senatorial group of the curatores viarum (translated as "Supervisors for Roads") for the upkeep of roads; this senatorial commission worked with local officials and contractors to organize regular repairs. The Corinthian order of architectural style originating from ancient Greece was the dominant architectural style in the age of Augustus and the imperial phase of Rome. Suetonius once commented that Rome was unworthy of its status as an imperial capital, yet Augustus and Agrippa set out to dismantle this sentiment by transforming the appearance of Rome upon the classical Greek model. Residences The official residence of Augustus was the Domus Augusti on the Palatine which he made into a palace after buying it in 41/40 BC. He had other residences such as the horti maecenati in Rome where Augustus preferred to stay whenever he became ill and which Maecenas left to him in his will in 8 BC. The great villa of Vedius Pollio at Posilipo near Naples was beqeathed (probably forced) to him in 15 BC. Augustus built the Palazzo a Mare palace on Capri. He also built the immense Villa Giulia on the island of Ventotene as a summer residence early in his reign. The family home of Augustus was probably the villa at Somma Vesuviana, Nola. This was the location where he died and where his father also died. Physical appearance and official images His biographer Suetonius, writing about a century after Augustus's death, described his appearance as: "... unusually handsome and exceedingly graceful at all periods of his life, though he cared nothing for personal adornment. He was so far from being particular about the dressing of his hair, that he would have several barbers working in a hurry at the same time, and as for his beard he now had it clipped and now shaved, while at the very same time he would either be reading or writing something ... He had clear, bright eyes ... His teeth were wide apart, small, and ill-kept; his hair was slightly curly and inclined to golden; his eyebrows met. His ears were of moderate size, and his nose projected a little at the top and then bent ever so slightly inward. His complexion was between dark and fair. He was short of stature, although Julius Marathus, his freedman and keeper of his records, says that he was five feet and nine inches (just under 5 ft. 7 in., or 1.70 meters, in modern height measurements), but this was concealed by the fine proportion and symmetry of his figure, and was noticeable only by comparison with some taller person standing beside him...", adding that "his shoes [were] somewhat high-soled, to make him look taller than he really was". Scientific analysis of traces of paint found in his official statues show that he most likely had light brown hair and eyes (his hair and eyes were depicted as the same color). His official images were very tightly controlled and idealized, drawing from a tradition of Hellenistic portraiture rather than the tradition of realism in Roman portraiture. He first appeared on coins at the age of 19, and from about 29 BC "the explosion in the number of Augustan portraits attests a concerted propaganda campaign aimed at dominating all aspects of civil, religious, economic and military life with Augustus's person." The early images did indeed depict a young man, but although there were gradual changes his images remained youthful until he died in his seventies, by which time they had "a distanced air of ageless majesty". Among the best known of many surviving portraits are the Augustus of Prima Porta, the image on the Ara Pacis, and the Via Labicana Augustus, which depicts him in his role as pontifex maximus. Several cameo portraits include the Blacas Cameo and Gemma Augustea. See also Augustan and Julio-Claudian art Augustan literature (ancient Rome) Propaganda in Augustan Rome Bierzo Edict Gaius Maecenas Indo-Roman trade relations Julio-Claudian family tree List of Roman emperors Temple of Augustus Notes References Sources Ancient sources Modern sources Further reading External links Works by and about Augustus at Perseus Digital Library Gallery of the Ancient Art: August The Via Iulia Augusta: road built by the Romans; constructed on the orders of Augustus between the 13–12 B.C. Augustan Legionaries – Augustus's legions and legionaries Augustus – short biography at the BBC Brown, F. The Achievements of Augustus Caesar, Clio History Journal, 2009. "Augustus Caesar and the Pax Romana" – essay by Steven Kreis about Augustus's legacy "De Imperatoribus Romanis" (archived 17 March 2022) – article about Augustus at Garrett G. Fagan's online encyclopedia of Roman emperors Augustus – article by Andrew Selkirk 63 BC births 14 deaths 1st-century BC Roman augurs 1st-century BC Roman consuls 1st-century BC rulers in Europe 1st-century Roman emperors 1st-century clergy Ancient Roman adoptees Ancient Roman military personnel Burials at the Mausoleum of Augustus Characters in Book VI of the Aeneid Children of Julius Caesar Deified Roman emperors Founding monarchs Julii Caesares Julio-Claudian dynasty People in the canonical gospels Political spokespersons Pontifices Roman pharaohs Shipwreck survivors 1st-century Romans Octavii

1274

https://en.wikipedia.org/wiki/Geography%20of%20Antarctica

Geography of Antarctica

The geography of Antarctica is dominated by its south polar location and, thus, by ice. The Antarctic continent, located in the Earth's southern hemisphere, is centered asymmetrically around the South Pole and largely south of the Antarctic Circle. It is washed by the Southern (or Antarctic) Ocean or, depending on definition, the southern Pacific, Atlantic, and Indian Oceans. It has an area of more than 14 million km2. Antarctica is the largest ice desert in the world. Some 98% of Antarctica is covered by the Antarctic ice sheet, the world's largest ice sheet and also its largest reservoir of fresh water. Averaging at least 1.6 km thick, the ice is so massive that it has depressed the continental bedrock in some areas more than 2.5 km below sea level; subglacial lakes of liquid water also occur (e.g., Lake Vostok). Ice shelves and rises populate the ice sheet on the periphery. The present Antarctic ice sheet accounts for 90 percent of Earth's total ice volume and 70 percent of its fresh water. It houses enough water to raise global sea level by 200 ft. In September 2018, researchers at the National Geospatial-Intelligence Agency released a high resolution terrain map (detail down to the size of a car, and less in some areas) of Antarctica, named the "Reference Elevation Model of Antarctica" (REMA). Regions Physically, Antarctica is divided in two by the Transantarctic Mountains, close to the neck between the Ross Sea and the Weddell Sea. Western Antarctica and Eastern Antarctica correspond roughly to the western and eastern hemispheres relative to the Greenwich meridian. West Antarctica is covered by the West Antarctic Ice Sheet. There has been some concern about this ice sheet, because there is a small chance that it will collapse. If it does, ocean levels would rise by a few metres in a very short period of time. Volcanoes Volcanoes that occur underneath glacial ice sheets are known by the term "Glaciovolcanism", or subglacial volcanoes. An article published in 2017 claims that researchers from Edinburgh University recently discovered 91 new volcanoes below the Antarctic ice sheet, adding to the 47 volcanoes that were already known. As of today, there have been 138 possible volcanoes identified in West Antarctica. There is limited knowledge about West Antarctic Volcanoes due to the presence of the West Antarctic Ice Sheet, which heavily covers the West Antarctic Rift System—a likely hub for volcanic activity. Researchers find it difficult to properly identify volcanic activity due to the comprehensive ice covering. East Antarctica is significantly larger than West Antarctica, and similarly remains widely unexplored in terms of its volcanic potential. While there are some indications that there is volcanic activity under the East Antarctic Ice Sheet, there is not a significant amount of present information on the subject. Mount Erebus is one of the most notable sites in the study of Antarctic Volcanism, in that it is the southernmost historically active volcanic site on the planet. Deception Island is another active Antarctic volcano. It is one of the most protected areas in the Antarctic, given its situation between the South Shetland Islands and the Antarctic Peninsula. As the most active volcano in the Antarctic peninsula, it has been studied closely since its initial discovery in 1820. There are four volcanoes on the mainland of Antarctica that are considered to be active on the basis of observed fumarolic activity or "recent" tephra deposits: Mount Melbourne (2,730 m) (74°21'S., 164°42'E.), a stratovolcano; Mount Berlin (3,500 m) (76°03'S., 135°52'W.), a stratovolcano; Mount Kauffman (2,365 m) (75°37'S., 132°25'W.), a stratovolcano; and Mount Hampton (3,325 m) (76°29'S., 125°48'W.), a volcanic caldera. Mount Rittmann (2,600 m) (73.45°S 165.5° E), a volcanic caldera. Several volcanoes on offshore islands have records of historic activity. Mount Erebus (3,795 m), a stratovolcano on Ross Island with 10 known eruptions and 1 suspected eruption. On the opposite side of the continent, Deception Island (62°57'S., 60°38'W.), a volcanic caldera with 10 known and 4 suspected eruptions, have been the most active. Buckle Island in the Balleny Islands (66°50'S., 163°12'E.), Penguin Island (62°06'S., 57°54'W.), Paulet Island (63°35'S., 55°47'W.), and Lindenberg Island (64°55'S., 59°40'W.) are also considered to be active. In 2017, the researchers of Edinburgh University discovered 91 underwater volcanoes under West Antarctica. Glaciovolcanism The definition of Glaciovolcanism is “the interactions of magma with ice in all its forms, including snow, firn and any meltwater.” It defines a special field of volcanic that is specifically centered around ice and ice melt. This field of science is less than 100 years old, and thus continuously makes new discoveries. Glaciovolcanism is characterized by three kinds of eruptions: sub-glacial eruptions, supraglacial volcanism, and ice-marginal volcanism. The study of glaciovolcanism is vital to the understanding of ice sheet formation. It is also a valuable tool to predict volcanic hazards, such as the ash hazard following the Eyjafjallajökull eruption in Iceland. Marie Byrd Land The Marie Byrd Land is an incredibly large portion of West Antarctica, consisting of the Area below the Antarctic Peninsula. The Marie Byrd land is a large formation of volcanic rock, characterized by 18 exposed and subglacial volcanoes. 16 of the 18 volcanoes are entirely covered by the antarctic ice sheet. There have been no eruptions recorded from any of the volcanoes in this area, however scientists believe that some of the volcanoes may be potentially active. Activity Scientists and researchers debate whether or not the 138 identified possible volcanoes are active or dormant. It is very hard to definitively say, given that many of these volcanic structures are buried underneath several kilometers of ice. However, ash layers within the West Antarctic Ice Sheet, as well as deformations in the ice surface indicate that the West Antarctic Rift System could be active and contain erupting volcanoes. Additionally, seismic activity in the region hints at magma movement beneath the crust, a sign of volcanic activity. Despite this, however, there is not yet definitive evidence of presently active volcanoes. Subglacial volcanism is often characterized by ice melt and subglacial water. Though there are other sources of subglacial water, such as geothermal heat, it almost always is a condition of volcanism. Scientists remain uncertain about the presence of water underneath the West Antarctic Ice Sheet, with some claiming to have found evidence indicating the existence. Conditions of Formation In West Antarctica's Marie Byrd Land, volcanoes are typically composed of alkaline and basaltic lava. Sometimes, the volcanoes are entirely basaltic in composition. Due to the geographic similarity of the Marie Byrd Land, it is believed that the volcanoes in the West Antarctic Rift System are also composed of basalt. Above-ice basaltic volcanoes, also known as subaerial basaltic volcanoes, generally form in tall, broad cone shapes. Since they are formed from repeated piling of liquid magma sourced from the center, they spread widely and grow upwards relatively slowly. However, West Antarctic Volcanoes form underneath ice sheets, and are thus categorized as subglacial volcanoes. Subglacial volcanoes that are monogenetic are far more narrow, steeper, flat topped structures. Polygenetic subglacial volcanoes have a wider variety of shapes and sizes due to being made up of many different eruptions. Often, they look more cone shaped, like stratovolcanoes. Hazards Hazardous ash Little has been studied about the implications of volcanic ash from eruptions within the Antarctic Circle. It is likely that an eruption at lower latitudes would cause global health and aviation hazards due to ash disbursement. The clockwise air circulation around the low pressure system at the South Pole forces air upwards, hypothetically sending ash upwards towards the Stratospheric jet streams, and thus quickly dispersing it throughout the globe. Melting ice Recently, in 2017, a study found evidence of subglacial volcanic activity within the West Antarctic Ice Sheet. This activity poses a threat to the stability of the Ice Sheet, as volcanic activity leads to increased melting. This could possibly plunge the West Antarctic Ice Sheet into a positive feedback loop of rising temperatures and increased melting. Canyons There are three vast canyons that run for hundreds of kilometers, cutting through tall mountains. None of the canyons are visible at the snow-covered surface of the continent since they are buried under hundreds of meters of ice. The largest of the canyons is called Foundation Trough and is over 350 km long and 35 km wide. The Patuxent Trough is more than 300 km long and over 15 km wide, while the Offset Rift Basin is 150 km long and 30 km wide. These three troughs all lie under and cross the so-called "ice divide" - the high ice ridge that runs all the way from the South Pole out towards the coast of West Antarctica. West Antarctica West Antarctica is the smaller part of the continent, (50° – 180°W), divided into: Areas Antarctic Peninsula (55° – 75°W) Graham Land Palmer Land Queen Elizabeth Land (20°W – 80°W) Ellsworth Land (79°45' – 103°24'W) English Coast Bryan Coast Eights Coast Marie Byrd Land (103°24' – 158°W) Walgreen Coast Bakutis Coast Hobbs Coast Ruppert Coast Saunders Coast King Edward VII Land (166°E – 155°W) Shirase Coast Seas Scotia Sea (26°30' – 65°W) Weddell Sea (57°18' – 102°20'W) Bellingshausen Sea (57°18' – 102°20'W) Amundsen Sea (102°20′ – 126°W) Ice shelves Larger ice shelves are: Filchner-Ronne Ice Shelf (30° – 83°W) Larsen Ice Shelf Abbot Ice Shelf (89°35' – 103°W) Getz Ice Shelf (114°30' – 136°W) Sulzberger Ice Shelf Ross Ice Shelf (166°E – 155°W) For all ice shelves see List of Antarctic ice shelves. Islands For a list of all Antarctic islands see List of Antarctic and sub-Antarctic islands. East Antarctica East Antarctica is the larger part of the continent, (50°W – 180°E), both the South Magnetic Pole and geographic South Pole are situated here. Divided into: Areas Coats Land (20° – 36°W) Queen Maud Land (20°W – 45°E) Princess Martha Coast Princess Astrid Coast Princess Ragnhild Coast Prince Harald Coast Prince Olav Coast Enderby Land (44°38' – 56°25'E) Kemp Land (56°25' – 59°34'E) Mac. Robertson Land (59°34' – 73°E) Princess Elizabeth Land (73° – 87°43'E) Wilhelm II Land (87°43' – 91°54'E) Queen Mary Land (91°54' – 100°30'E) Wilkes Land (100°31' – 136°11'E) Adélie Land (136°11′ – 142°02′E) George V Land (142°02' – 153°45'E) George V Coast Zélée Subglacial Trench Oates Land (153°45' – 160°E) Victoria Land (70°30' – 78°'S) Seas Weddell Sea (57°18' – 102°20'W) King Haakon VII Sea (20°W – 45°E) Davis Sea (82° – 96°E) Mawson Sea (95°45' – 113°E) D'Urville Sea (140°E) Ross Sea (166°E – 155°W) Bellingshausen Sea (57°18' – 102°20'W) Scotia Sea (26°30' – 65°W) Ice shelves Larger ice shelves are: Riiser-Larsen Ice Shelf Ekstrom Ice Shelf Amery Ice Shelf West Ice Shelf Shackleton Ice Shelf Voyeykov Ice Shelf For all ice shelves see List of Antarctic ice shelves. Islands For a list of all Antarctic islands see List of Antarctic and sub-Antarctic islands. Research stations Territorial landclaims Seven nations have made official Territorial claims in Antarctica. Dependences and territories Bouvet Island French Southern and Antarctic Lands Heard and McDonald Islands South Georgia and the South Sandwich Islands Peter I Island See also List of Antarctic and Subantarctic islands Geology of Antarctica Notes References General references Ivanov, L. General Geography and History of Livingston Island. In: Bulgarian Antarctic Research: A Synthesis. Eds. C. Pimpirev and N. Chipev. Sofia: St. Kliment Ohridski University Press, 2015. pp. 17–28. External links High resolution map (2018) – Reference Elevation Model of Antarctica (REMA) Political Claims Map USGS TerraWeb: Satellite Image Map of Antarctica (archived 1March 2005) United States Antarctic Resource Center (USARC) BEDMAP (archived 25 January 2005) Antarctic Digital Database (Topographic data for Antarctica, including web map browser) Landsat Image Mosaic of Antarctica (LIMA; USGS web pages) Landsat Image Mosaic of Antarctica (LIMA; NASA web pages) (archived 14 February 2015) Geography of the land under the ice of Antarctica: http://www.cbc.ca/news/technology/nasa-map-shows-what-antarctica-would-look-like-without-ice-1.1304997 https://www.bas.ac.uk/project/bedmap-2/ https://www.bas.ac.uk/data/our-data/maps/thematic-maps/bedmap2/ https://www.the-cryosphere.net/7/375/2013/tc-7-375-2013.pdf article in The Cryosphere, 7, 375–393, 2013 https://www.google.com/search?q=bedmap2&ie=utf-8&oe=utf-8&client=firefox-b Google search

1279

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

Transport in Antarctica

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

1285

https://en.wikipedia.org/wiki/Geography%20of%20Alabama

Geography of Alabama

The geography of Alabama describes a state in the Southeastern United States in North America. It extends from high mountains to low valleys and sandy beaches. Alabama is 30th in size and borders four U.S. states: Mississippi, Tennessee, Georgia, and Florida. It also borders the Gulf of Mexico. Physical features Extending entirely across the state of Alabama for about northern boundary, and in the middle stretching farther north, is the Cumberland Plateau, or Tennessee Valley region, broken into broad tablelands by the dissection of rivers. In the northern part of this plateau, west of Jackson county, there are about of level highlands from above sea level. South of these highlands, occupying a narrow strip on each side of the Tennessee River, is a country of gentle rolling lowlands varying in elevation from . To the northeast of these highlands and lowlands is a rugged section with steep mountain-sides, deep narrow coves and valleys, and flat mountain-tops. Its elevations range from . In the remainder of this region, the southern portion, the most prominent feature is Little Mountain, extending about from east to west between two valleys, and rising precipitously on the north side above them or above the sea. Adjoining the Cumberland Plateau region on the southeast is the Appalachian Valley (locally known as Coosa Valley) region, which is the southern extremity of the Appalachian Mountains, and occupies an area within the state of about . This is a limestone belt with parallel hard rock ridges left standing by erosion to form mountains. Although the general direction of the mountains, ridges, and valleys is northeast and southwest, irregularity is one of the most prominent characteristics. In the northeast are several flat-topped mountains, of which Raccoon and Lookout are the most prominent, having a maximum elevation near the Georgia line of little more than and gradually decreasing in height toward the southwest, where Sand Mountain is a continuation of Raccoon. South of these the mountains are marked by steep northwest sides, sharp crests and gently sloping southeast sides. Southeast of the Appalachian Valley region, the Piedmont Plateau also crosses the Alabama border from the N.E. and occupies a small triangular-shaped section of which Randolph and Clay counties, together with the northern part of Tallapoosa and Chambers, form the principal portion. Its surface is gently undulating and has an elevation of about above sea level. The Piedmont Plateau is a lowland worn down by erosion on hard crystalline rocks, then uplifted to form a plateau. The remainder of the state is occupied by the Coastal Plain. This is crossed by foothills and rolling prairies in the central part of the state, where it has a mean elevation of about , becomes lower and more level toward the southwest, and in the extreme south is flat and but slightly elevated above the sea. The Cumberland Plateau region is drained to the west-northwest by the Tennessee River and its tributaries; all other parts of the state are drained to the southwest. In the Appalachian Valley region the Coosa River is the principal river; and in the Piedmont Plateau, the Tallapoosa River. In the Coastal Plain are the Tombigbee River in the west, the Alabama River (formed by the Coosa and Tallapoosa) in the western central, and in the east the Chattahoochee River, which forms almost half of the Georgia boundary. The Tombigbee and Alabama rivers unite near the southwest corner of the state, their waters discharging into Mobile Bay by the Mobile and Tensas rivers. The Black Warrior River is a considerable stream which joins the Tombigbee from the east. The valleys in the north and northeast are usually deep and narrow, but in the Coastal Plain they are broad and in most cases rise in three successive terraces above the stream. The harbour of Mobile was formed by the drowning of the lower part of the valley of the Alabama and Tombigbee rivers as a result of the sinking of the land here, such sinking having occurred on other parts of the Gulf coast. Flora and fauna The fauna and flora of Alabama are similar to those of the Gulf states in general and have no distinctive characteristics. However, the Mobile River system has a high incidence of endemism among freshwater mollusks and biodiversity is high. In Alabama, vast forests of pine constitute the largest proportion of the state's forest growth. There is also an abundance of cypress, hickory, oak, populus, and eastern redcedar trees. In other areas, hemlock growths in the north and southern white cedar in the southwest. Other native trees include ash, hackberry, and holly. In the Gulf region of the state grow various species of palmetto and palm. In Alabama there are more than 150 shrubs, including mountain laurel and rhododendron. Among cultivated plants are wisteria and camellia. While in the past the state enjoyed a variety of mammals such as plains bison, eastern elk, North American cougar, bear, and deer, only the white-tailed deer remains abundant. Still fairly common are the bobcat, American beaver, muskrat, raccoon, Virginia opossum, rabbit, squirrel, red and gray foxes, and long-tailed weasel. Coypu and nine-banded armadillo have been introduced to the state and now also common. Alabama's birds include golden and bald eagles, osprey and other hawks, yellow-shafted flickers, and black-and-white warblers. Game birds include bobwhite quail, duck, wild turkey, and goose. Freshwater fish such as bream, shad, bass, and sucker are common. Along the Gulf Coast there are seasonal runs of tarpon, pompano, red drum, and bonito. The U.S. Fish and Wildlife Service lists as endangered 99 animals, fish, and birds, and 18 plant species. The endangered animals include the Alabama beach mouse, gray bat, Alabama red-bellied turtle, fin and humpback whales, bald eagle, and wood stork. American black bear, racking horse, yellow-shafted flicker, wild turkey, Atlantic tarpon, largemouth bass, southern longleaf pine, eastern tiger swallowtail, monarch butterfly, Alabama red-bellied turtle, Red Hills salamander, camellia, oak-leaf hydrangea, peach, pecan, and blackberry are Alabama's state symbols. Climate and soil The climate of Alabama is humid subtropical. The heat of summer is tempered in the south by the winds from the Gulf of Mexico, and in the north by the elevation above the sea. The average annual temperature is highest in the southwest along the coast, and lowest in the northeast among the highlands. Thus at Mobile the annual mean is , the mean for the summer , and for the winter ; and at Valley Head, in De Kalb county, the annual mean is , the mean for the summer , and for the winter . At Montgomery, in the central region, the average annual temperature is , with a winter average of , and a summer average of . The average winter minimum for the entire state is , and there is an average of 35 days in each year in which the thermometer falls below the freezing-point. At extremely rare intervals the thermometer has fallen below zero (-18 °C), as was the case in the remarkable cold wave of the 12th-13 February 1899, when an absolute minimum of was registered at Valley Head. The highest temperature ever recorded was in Talladega county in 1902. The amount of precipitation is greatest along the coast (62 inches/1,574 mm) and evenly distributed through the rest of the state (about 52 inches/1,320 mm). During each winter there is usually one fall of snow in the south and two in the north; but the snow quickly disappears, and sometimes, during an entire winter, the ground is not covered with snow. Heavy snowfall can occur, such as during the New Year's Eve 1963 snowstorm and the 1993 Storm of the Century. Hailstorms occur occasionally in the spring and summer, but are seldom destructive. Heavy fogs are rare, and are confined chiefly to the coast. Thunderstorms occur throughout the year - they are most common in the summer, but most severe in the spring and fall, when destructive winds and tornadoes occasionally occur. The prevailing winds are from the news. Hurricanes are quite common in the state, especially in the southern part, and major hurricanes occasionally strike the coast which can be very destructive. As regards its soil, Alabama may be divided into four regions. Extending from the Gulf northward for about is the outer belt of the Coastal Plain, also called the Timber Belt, whose soil is sandy and poor, but responds well to fertilization. North of this is the inner lowland of the Coastal Plain, or the Black Prairie, which includes some and seventeen counties. It receives its name from its soil (weathered from the weak underlying limestone), which is black in colour, almost destitute of sand and loam, and rich in limestone and marl formations, especially adapted to the production of cotton; hence the region is also called the Cotton Belt. Between the Cotton Belt and the Tennessee Valley is the mineral region, the Old Land area—a region of resistant rocks—whose soils, also derived from weathering in silu, are of varied fertility, the best coming from the granites, sandstones and limestones, the poorest from the gneisses, schists and slates. North of the mineral region is the Cereal Belt, embracing the Tennessee Valley and the counties beyond, whose richest soils are the red clays and dark loams of the river valley; north of which are less fertile soils, produced by siliceous and sandstone formations. Wetumpka Meteor Crater Wetumpka is the home of "Alabama's greatest natural disaster." A -wide meteorite hit the area about 80 million years ago. The hills just east of downtown showcase the eroded remains of the wide impact crater that was blasted into the bedrock, with the area labeled the Wetumpka crater or astrobleme ("star-wound") for the concentric rings of fractures and zones of shattered rock can be found beneath the surface. In 2002, Christian Koeberl with the Institute of Geochemistry University of Vienna published evidence and established the site as an internationally recognized impact crater. Public lands Alabama includes several types of public use lands. These include four national forests and one national preserve within state borders that provide over 25% of the state's public recreation land. land regions Alabama State Parks Alabama Public Fishing Lakes Alabama Wildlife Management Areas Little River Canyon National Preserve Russell Cave National Monument National Forests Conecuh National Forest Talladega National Forest Tuskegee National Forest William B. Bankhead National Forest Wilderness Areas Cheaha Wilderness Dugger Mountain Wilderness Sipsey Wilderness National Recreation Trail Pinhoti National Recreation Trail National Wildlife Refuge Bon Secour National Wildlife Refuge Cahaba River National Wildlife Refuge Choctaw National Wildlife Refuge Eufaula National Wildlife Refuge Fern Cave National Wildlife Refuge Key Cave National Wildlife Refuge Mountain Longleaf National Wildlife Refuge Sauta Cave National Wildlife Refuge Watercress Darter National Wildlife Refuge Wheeler National Wildlife Refuge See also Alabama Geography of the United States References External links State of Alabama Geological Survey USGS - Tapestry of Time - Alabama Summary of Alabama Park & Recreation Sites Interactive Map of Park & Recreation Sites Encyclopedia of Alabama: Cultural Geography Encyclopedia of Alabama: Black Belt Region in Alabama

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List of governors of Alabama

The governor of Alabama is the head of government of the U.S. state of Alabama. The governor is the head of the executive branch of Alabama's state government and is charged with enforcing state laws. There have officially been 54 governors of the state of Alabama; this official numbering skips acting and military governors. The first governor, William Wyatt Bibb, served as the only governor of the Alabama Territory. Five people have served as acting governor, bringing the total number of people serving as governor to 59, spread over 63 distinct terms. Four governors have served multiple non-consecutive terms: Bibb Graves, Jim Folsom, and Fob James each served two, and George Wallace served three non-consecutive periods. Officially, these non-consecutive terms are numbered only with the number of their first term. William D. Jelks also served non-consecutive terms, but his first term was in an acting capacity. The longest-serving governor was George Wallace, who served 16 years over four terms. The shortest term for a non-acting governor was that of Hugh McVay, who served four and a half months after replacing the resigning Clement Comer Clay. Lurleen Wallace, wife of George Wallace, was the first woman to serve as governor of Alabama, and the third woman to serve as governor of any state. The current governor is Republican Kay Ivey, who took office on April 10, 2017 following Robert J. Bentley's resignation amidst a corruption scandal. She is the second female governor of Alabama. Governors Governor of the Territory of Alabama Alabama Territory was formed on March 3, 1817, from Mississippi Territory. It had only one governor appointed by the President of the United States before it became a state; he became the first state governor. Governors of the State of Alabama Alabama was admitted to the Union on December 14, 1819. It seceded from the Union on January 11, 1861, and was a founding member of the Confederate States of America on February 4, 1861. Following the end of the American Civil War, Alabama during Reconstruction was part of the Third Military District, which exerted some control over governor appointments and elections. Alabama was readmitted to the Union on July 14, 1868. The first Alabama Constitution, ratified in 1819, provided that a governor be elected every two years, limited to serve no more than 4 out of every 6 years. This limit remained in place until the constitution of 1868, which simply allowed governors to serve terms of two years. The current constitution of 1901 increased terms to four years, but prohibited governors from succeeding themselves. Amendment 282 to the constitution, passed in 1968, allowed governors to succeed themselves once; a governor serving two consecutive terms can run again after waiting out the next term. The constitution had no set date for the commencement of a governor's term until 1901, when it was set at the first Monday after the second Tuesday in the January following an election. However, the Alabama Supreme Court ruled in 1911 that a governor's term ends at midnight at the end of Monday, and the next governor's term begins the next day, regardless of if they were sworn in on Monday. The office of lieutenant governor was created in 1868, abolished in 1875, and recreated in 1901. According to the current constitution, should the governor be out of the state for more than 20 days, the lieutenant governor becomes acting governor, and if the office of governor becomes vacant the lieutenant governor ascends to the governorship. Earlier constitutions said the powers of the governor devolved upon the successor, rather than them necessarily becoming governor, but the official listing includes these as full governors. The governor and lieutenant governor are not elected on the same ticket. Alabama was a strongly Democratic state before the Civil War, electing only candidates from the Democratic-Republican and Democratic parties. It had two Republican governors following Reconstruction, but after the Democratic Party re-established control, 112 years passed before voters chose another Republican. See also List of Alabama state legislatures Notes References General Constitutions Specific External links Office of the Governor of Alabama Lists of state governors of the United States Governors Political history of Alabama

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Apocrypha

Apocrypha are written works, often of unknown authorship or doubtful origin. In Christianity, the word apocryphal (ἀπόκρυφος) was first applied to writings which were to be read privately rather than in the public context of church services -- edifying Christian works which were not considered canonical Scripture. In the wake of the Protestant Reformation, the word apocrypha came to mean "false, spurious, bad, or heretical". From a Protestant point of view, Biblical apocrypha are a set of texts included in the Septuagint and the Latin Vulgate, but not in the Hebrew Bible. While Catholic tradition considers some of these texts to be deuterocanonical, and the Orthodox Churches consider them all to be canonical, Protestants consider them apocryphal, that is, non-canonical books that are useful for instruction. Luther's Bible placed them in a separate section in between the Old Testament and New Testament called the Apocrypha, a convention followed by subsequent Protestant Bibles. Other non-canonical apocryphal texts are generally called pseudepigrapha, a term that means "false attribution". Etymology The word's origin is the Medieval Latin adjective (secret, or non-canonical) from the Greek adjective , , (private) from the verb , (to hide away). It comes from Greek and is formed from the combination of (away) and (hide or conceal). The word apocrypha has undergone a major change in meaning throughout the centuries. The word apocrypha in its ancient Christian usage originally meant a text read in private, rather than in public church settings. In English, it later came to have a sense of the esoteric, suspicious, or heretical, largely because of the Protestant interpretation of the usefulness of non-canonical texts. Esoteric writings and objects The word apocryphal () was first applied to writings which were kept secret because they were the vehicles of esoteric knowledge considered too profound or too sacred to be disclosed to anyone other than the initiated. For example, the disciples of the Gnostic Prodicus boasted that they possessed the secret () books of Zoroaster. The term in general enjoyed high consideration among the Gnostics (see Acts of Thomas, pp. 10, 27, 44). Sinologist Anna Seidel refers to texts and even items produced by ancient Chinese sages as apocryphal and studied their uses during Six Dynasties China (A.D. 220 to 589). These artifacts were used as symbols legitimizing and guaranteeing the Emperor's Heavenly Mandate. Examples of these include talismans, charts, writs, tallies, and registers. The first examples were stones, jade pieces, bronze vessels and weapons, but came to include talismans and magic diagrams. From their roots in Zhou era China (1066 to 256 BC), these items came to be surpassed in value by texts by the Han dynasty (206 BC to AD 220). Most of these texts have been destroyed as Emperors, particularly during the Han dynasty, collected these legitimizing objects and proscribed, forbade and burnt nearly all of them to prevent them from falling into the hands of political rivals. Writings of questionable value Apocrypha was also applied to writings that were hidden not because of their divinity but because of their questionable value to the church. The early Christian theologian Origen, in his Commentaries on Matthew, distinguishes between writings which were read by the churches and apocryphal writings: (writing not found in the common and published books on one hand [and] actually found in the secret ones on the other). The meaning of is here practically equivalent to "excluded from the public use of the church" and prepares the way for an even less favourable use of the word. Spurious writings In general use, the word apocrypha came to mean "of doubtful authenticity". This meaning also appears in Origen's prologue to his commentary on the Song of Songs, of which only the Latin translation survives: Other The Gelasian Decree (generally held now as being the work of an anonymous scholar between 519 and 553) refers to religious works by church fathers Eusebius, Tertullian and Clement of Alexandria as apocrypha. Augustine defined the word as meaning simply "obscurity of origin", implying that any book of unknown authorship or questionable authenticity would be considered apocryphal. Jerome in Prologus Galeatus declared that all books outside the Hebrew canon were apocryphal. In practice, Jerome treated some books outside the Hebrew canon as if they were canonical, and the Western Church did not accept Jerome's definition of apocrypha, instead retaining the word's prior meaning. As a result, various church authorities labeled different books as apocrypha, treating them with varying levels of regard. Origen stated that "the canonical books, as the Hebrews have handed them down, are twenty-two". Clement and others cited some apocryphal books as "scripture," "divine scripture," "inspired," and the like. Teachers connected with Palestine and familiar with the Hebrew canon (the protocanon) excluded from the canon all of the Old Testament not found there. This view is reflected in the canon of Melito of Sardis, and in the prefaces and letters of Jerome. A third view was that the books were not as valuable as the canonical scriptures of the Hebrew collection, but were of value for moral uses, as introductory texts for new converts from paganism, and to be read in congregations. They were referred to as "ecclesiastical" works by Rufinus. In 1546, the Catholic Council of Trent reconfirmed the canon of Augustine, dating to the second and third centuries, declaring "He is also to be anathema who does not receive these entire books, with all their parts, as they have been accustomed to be read in the Catholic Church, and are found in the ancient editions of the Latin Vulgate, as sacred and canonical." The whole of the books in question, with the exception of 1 Esdras and 2 Esdras and the Prayer of Manasseh, were declared canonical at Trent. The Protestants, in comparison, were diverse in their opinion of the deuterocanon early on. Some considered them divinely inspired, others rejected them. Lutherans and Anglicans retained the books as Christian intertestamental readings and a part of the Bible (in a section called "Apocrypha"), but no doctrine should be based on them. John Wycliffe, a 14th-century Christian Humanist, had declared in his biblical translation that "whatever book is in the Old Testament besides these twenty-five shall be set among the apocrypha, that is, without authority or belief." Nevertheless, his translation of the Bible included the apocrypha and the Epistle of the Laodiceans. Martin Luther did not class apocryphal books as being scripture, but in the German Luther Bible (1534) the apocrypha are published in a separate section from the other books, although the Lutheran and Anglican lists are different. Anabaptists use the Luther Bible, which contains the intertestamental books; Amish wedding ceremonies include "the retelling of the marriage of Tobias and Sarah in the Apocrypha". The fathers of Anabaptism, such as Menno Simmons, quoted "them [the Apocrypha] with the same authority and nearly the same frequency as books of the Hebrew Bible" and the texts regarding the martyrdoms under Antiochus IV in 1 Maccabees and 2 Maccabees are held in high esteem by the Anabaptists, who faced persecution in their history. In Reformed editions (like the Westminster), readers were warned that these books were not "to be any otherwise approved or made use of than other human writings". A milder distinction was expressed elsewhere, such as in the "argument" introducing them in the Geneva Bible, and in the Sixth Article of the Church of England, where it is said that "the other books the church doth read for example of life and instruction of manners," though not to establish doctrine. Among some Nonconformists, the term apocryphal began to take on extra or altered connotations: not just of dubious authenticity, but having spurious or false content, Protestants, being diverse in theological views, were not unanimous in adopting those meanings. Generally, Anabaptists and magisterial Protestants recognize the fourteen books of the Apocrypha as being non-canonical, but useful for reading "for example of life and instruction of manners": a view that continues today throughout the Lutheran Church, the worldwide Anglican Communion, among many other denominations, such as the Methodist Churches and Quaker Yearly Meetings. Liturgically, the Catholic, Methodist and Anglican churches have a scripture reading from the Book of Tobit in services of Holy Matrimony. According to the Orthodox Anglican Church: Though Protestant Bibles historically include 80 books, 66 of these form the Protestant canon (such as listed in the Westminster Confession of 1646), which has been well established for centuries, with many today supporting the use of the Apocrypha and others contending against the Apocrypha using various arguments. Metaphorical usage The adjective apocryphal is commonly used in modern English to refer to any text or story considered to be of dubious veracity or authority, although it may contain some moral truth. In this broader metaphorical sense, the word suggests a claim that is in the nature of folklore, factoid or urban legend. Buddhism Apocryphal Jatakas of the Pāli Canon, such as those belonging to the Paññāsajātaka collection, have been adapted to fit local culture in certain Southeast Asian countries and have been retold with amendments to the plots to better reflect Buddhist morals. Within the Pali tradition, the apocryphal Jatakas of later composition (some dated even to the 19th century) are treated as a separate category of literature from the "official" Jataka stories that have been more-or-less formally canonized from at least the 5th century—as attested to in ample epigraphic and archaeological evidence, such as extant illustrations in bas relief from ancient temple walls. Judaism The Jewish apocrypha, known in Hebrew as הספרים החיצונים (Sefarim Hachizonim: "the external books"), are books written in large part by Jews, especially during the Second Temple period, not accepted as sacred manuscripts when the Hebrew Bible was canonized. Some of these books are considered sacred by some Christians, and are included in their versions of the Old Testament. The Jewish apocrypha is distinctive from the New Testament apocrypha and biblical apocrypha as it is the only one of these collections which works within a Jewish theological framework. Although Orthodox Jews believe in the exclusive canonization of the current 24 books in the Hebrew Bible, they also consider the Oral Torah, which they believe was handed down from Moses, to be authoritative. Some argue that the Sadducees, unlike the Pharisees but like the Samaritans, seem to have maintained an earlier and smaller number of texts as canonical, preferring to hold to only what was written in the Law of Moses (the Torah), making most of the presently accepted canon, both Jewish and Christian, apocryphal in their eyes. Others believe that it is often mistakenly asserted that the Sadducees only accepted the Pentateuch (Torah). The Essenes in Judea and the Therapeutae in Egypt were said to have a secret literature (see Dead Sea scrolls). Other traditions maintained different customs regarding canonicity. The Ethiopian Jews, for instance, seem to have retained a spread of canonical texts similar to the Ethiopian Orthodox Christians. Christianity Intertestamental books During the Apostolic Age many Jewish texts of Hellenistic origin existed within Judaism and were frequently used by Christians. Patristic authorities frequently recognized these books as important to the emergence of Christianity, but the inspired authority and value of the apocrypha remained widely disputed. Christians included several of these books in the canons of the Christian Bibles, calling them the "apocrypha" or the "hidden books". In the sixteenth century, during the Protestant Reformation, the canonical validity of the intertestamental books was challenged and fourteen books were classed in 80 book Protestant Bibles as an intertestamental section called the Apocrypha, which straddles the Old Testament and New Testament. Prior to 1629, all English-language Protestant Bibles included the Old Testament, Apocrypha, and New Testament; examples include the "Matthew's Bible (1537), the Great Bible (1539), the Geneva Bible (1560), the Bishop's Bible (1568), and the King James Bible (1611)". Fourteen out of eighty biblical books comprise the Protestant Apocrypha, first published as such in Luther's Bible (1534). Many of these texts are considered canonical Old Testament books by the Catholic Church, affirmed by the Council of Rome (AD 382) and later reaffirmed by the Council of Trent (1545–63); all of the books of the Protestant Apocrypha are considered canonical by the Eastern Orthodox Church and are referred to as anagignoskomena per the Synod of Jerusalem (1672). To this date, scripture readings from the Apocrypha are included in the lectionaries of the Lutheran Churches and the Anglican Churches. Anabaptists use the Luther Bible, which contains the intertestamental books; Amish wedding ceremonies include "the retelling of the marriage of Tobias and Sarah in the Apocrypha". The Anglican Communion accepts the Protestant Apocrypha "for instruction in life and manners, but not for the establishment of doctrine (Article VI in the Thirty-Nine Articles)", and many "lectionary readings in The Book of Common Prayer are taken from the Apocrypha", with these lessons being "read in the same ways as those from the Old Testament". The first Methodist liturgical book, The Sunday Service of the Methodists, employs verses from the Apocrypha, such as in the Eucharistic liturgy. The Protestant Apocrypha contains three books (1 Esdras, 2 Esdras and the Prayer of Manasseh) that are accepted by many Eastern Orthodox Churches and Oriental Orthodox Churches as canonical, but are regarded as non-canonical by the Catholic Church and are therefore not included in modern Catholic Bibles. In the 1800s, the British and Foreign Bible Society did not regularly publish the intertestamental section in its Bibles, citing the cost of printing the Apocrypha in addition to the Old Testament and New Testament as a major factor; this legacy came to characterize English-language Bibles in Great Britain and the Americas, unlike in Europe where Protestant Bibles are printed with 80 books in three sections: the Old Testament, Apocrypha, and New Testament. In the present-day, "English Bibles with the Apocrypha are becoming more popular again", usually being printed as intertestamental books. The Revised Common Lectionary, in use by most mainline Protestants including Methodists and Moravians, lists readings from the Apocrypha in the liturgical calendar, although alternate Old Testament scripture lessons are provided. The status of the deuterocanonicals remains unchanged in Catholic and Orthodox Christianity, though there is a difference in number of these books between these two branches of Christianity. Some authorities began using term deuterocanonical to refer to this traditional intertestamental collection as books of "the second canon". These books are often seen as helping to explain the theological and cultural transitions which took place between the Old and New Testaments. They are also sometimes called "intertestamental" by religious groups who do not recognize Hellenistic Judaism as belonging with either Jewish or Christian testaments. Slightly varying collections of apocryphal, deuterocanonical or intertestamental books of the Bible form part of the Catholic, Eastern Orthodox and Oriental Orthodox canons. The deuterocanonical or intertestamental books of the Catholic Church include Tobit, Judith, Baruch, Sirach, 1 Maccabees, 2 Maccabees, Wisdom and additions to Esther, Daniel, and Baruch. The Book of Enoch is included in the biblical canon of the Oriental Orthodox churches of Ethiopia and Eritrea. The Epistle of Jude alludes to a story in the book of Enoch, and some believe the use of this book also appears in the four gospels and 1 Peter. However, while Jesus and his disciples sometimes used phrases also featured in some of the Apocryphal books, the Book of Enoch was never referenced by Jesus. The genuineness and inspiration of Enoch were believed in by the writer of the Epistle of Barnabas, Irenaeus, Tertullian and Clement of Alexandria and many others of the early church. The Epistles of Paul and the Gospels also show influences from the Book of Jubilees, which is part of the Ethiopian canon, as well as the Assumption of Moses and the Testaments of the Twelve Patriarchs, which are included in no biblical canon. Canonicity The establishment of a largely settled uniform canon was a process of centuries, and what the term canon (as well as apocrypha) precisely meant also saw development. The canonical process took place with believers recognizing writings as being inspired by God from known or accepted origins, subsequently being followed by official affirmation of what had become largely established through the study and debate of the writings. The first ecclesiastical decree on the Catholic Church's canonical books of the Sacred Scriptures is attributed to the Council of Rome (382), and is correspondent to that of Trent. Martin Luther, like Jerome, favored the Masoretic canon for the Old Testament, excluding apocryphal books in the Luther Bible as unworthy to be properly called scripture, but included most of them in a separate section. Luther did not include the deuterocanonical books in his Old Testament, terming them "Apocrypha, that are books which are not considered equal to the Holy Scriptures, but are useful and good to read." The Eastern Orthodox Church accepts four other books into its canon than what are contained in the Catholic canon: Psalm 151, the Prayer of Manasseh, 3 Maccabees, and 1 Esdras. Disputes The status of the books which the Catholic Church terms Deuterocanonicals (second canon) and Protestantism refers to as Apocrypha has been an issue of disagreement which preceded the Reformation. Many believe that the pre-Christian-era Jewish translation (into Greek) of holy scriptures known as the Septuagint, a Greek translation of the Hebrew Scriptures originally compiled around 280 BC, originally included the apocryphal writings in dispute, with little distinction made between them and the rest of the Old Testament. Others argue that the Septuagint of the first century did not contain these books but they were added later by Christians. The earliest extant manuscripts of the Septuagint are from the fourth century, and suffer greatly from a lack of uniformity as regards containing apocryphal books, and some also contain books classed as pseudepigrapha, from which texts were cited by some early writers in the second and later centuries as being scripture. While a few scholars conclude that the Jewish canon was the achievement of the Hasmonean dynasty, it is generally considered not to have been finalized until about 100 AD or somewhat later, at which time considerations of Greek language and beginnings of Christian acceptance of the Septuagint weighed against some of the texts. Some were not accepted by the Jews as part of the Hebrew Bible canon and the Apocrypha is not part of the historical Jewish canon. Early church fathers such as Athanasius, Melito, Origen, and Cyril of Jerusalem, spoke against the canonicity of much or all of the apocrypha, but the most weighty opposition was the fourth century Catholic scholar Jerome who preferred the Hebrew canon, whereas Augustine and others preferred the wider (Greek) canon, with both having followers in the generations that followed. The Catholic Encyclopedia states as regards the Middle Ages, The prevailing attitude of Western medieval authors is substantially that of the Greek Fathers. The wider Christian canon accepted by Augustine became the more established canon in the western Church after being promulgated for use in the Easter Letter of Athanasius (circa 372 A.D.), the Synod of Rome (382 A.D., but its Decretum Gelasianum is generally considered to be a much later addition ) and the local councils of Carthage and Hippo in north Africa (391 and 393 A.D). Athanasius called canonical all books of the Hebrew Bible including Baruch, while excluding Esther. He adds that "there are certain books which the Fathers had appointed to be read to catechumens for edification and instruction; these are the Wisdom of Solomon, the Wisdom of Sirach (Ecclesiasticus), Esther, Judith, Tobias, the Didache, or Doctrine of the Apostles, and the Shepherd of Hermas. All others are apocrypha and the inventions of heretics (Festal Epistle for 367)". Nevertheless, none of these constituted indisputable definitions, and significant scholarly doubts and disagreements about the nature of the Apocrypha continued for centuries and even into Trent, which provided the first infallible definition of the Catholic canon in 1546. This canon came to see appropriately 1,000 years of nearly uniform use by the majority, even after the 11th-century schism that separated the church into the branches known as the Roman Catholic and Eastern Orthodox churches. In the 16th century, the Protestant reformers challenged the canonicity of the books and partial-books found in the surviving Septuagint but not in the Masoretic Text. In response to this challenge, after the death of Martin Luther (February 8, 1546) the ecumenical Council of Trent officially ("infallibly") declared these books (called "deuterocanonical" by Catholics) to be part of the canon in April, 1546 A.D. While the Protestant Reformers rejected the parts of the canon that were not part of the Hebrew Bible, they included the four New Testament books Luther considered of doubtful canonicity along with the Apocrypha in his non-binding Luther's canon (although most were separately included in his Bible, as they were in some editions of the KJV bible until 1947). Protestantism therefore established a 66 book canon with the 39 books based on the ancient Hebrew canon, along with the traditional 27 books of the New Testament. Protestants also rejected the Catholic term "deuterocanonical" for these writings, preferring to apply the term "apocryphal" which was already in use for other early and disputed writings. As today (but along with other reasons), various reformers argued that those books contained doctrinal or other errors and thus should not have been added to the canon for that reason. The differences between canons can be seen under Biblical canon and Development of the Christian biblical canon. Explaining the Eastern Orthodox Church's canon is made difficult because of differences of perspective with the Roman Catholic church in the interpretation of how it was done. Those differences (in matters of jurisdictional authority) were contributing factors in the separation of the Roman Catholics and Orthodox around 1054, but the formation of the canon which Trent would later officially definitively settle was largely complete by the fifth century, if not settled, six centuries before the separation. In the eastern part of the church, it took much of the fifth century also to come to agreement, but in the end it was accomplished. The canonical books thus established by the undivided church became the predominant canon for what was later to become Roman Catholic and Eastern Orthodox alike. The East already differed from the West in not considering every question of canon yet settled, and it subsequently adopted a few more books into its Old Testament. It also allowed consideration of yet a few more to continue not fully decided, which led in some cases to adoption in one or more jurisdictions, but not all. Thus, there are today a few remaining differences of canon among Orthodox, and all Orthodox accept a few more books than appear in the Catholic canon. The Psalms of Solomon, 3 Maccabees, 4 Maccabees, the Epistle of Jeremiah the Book of Odes, the Prayer of Manasseh and Psalm 151 are included in some copies of the Septuagint, some of which are accepted as canonical by Eastern Orthodox and some other churches. Protestants accept none of these additional books as canon, but see them having roughly the same status as the other Apocrypha. Eastern Orthodoxy uses a different definition than the Roman Catholic Church does for the books of its canon that it calls deuterocanonical, referring to them as a class of books with less authority than other books of the Old Testament. In contrast, the Catholic Church uses this term to refer to a class of books that were added to its canon later than the other books in its Old Testament canon, considering them all of equal authority. New Testament apocrypha New Testament apocrypha—books similar to those in the New Testament but almost universally rejected by Catholics, Orthodox and Protestants—include several gospels and lives of apostles. Some were written by early Jewish Christians (see the Gospel according to the Hebrews). Others of these were produced by Gnostic authors or members of other groups later defined as heterodox. Many texts believed lost for centuries were unearthed in the 19th and 20th centuries, producing lively speculation about their importance in early Christianity among religious scholars, while many others survive only in the form of quotations from them in other writings; for some, no more than the title is known. Artists and theologians have drawn upon the New Testament apocrypha for such matters as the names of Dismas and Gestas and details about the Three Wise Men. The first explicit mention of the perpetual virginity of Mary is found in the pseudepigraphical Infancy Gospel of James. Before the fifth century, the Christian writings that were then under discussion for inclusion in the canon but had not yet been accepted were classified in a group known as the ancient antilegomenae. These were all candidates for the New Testament and included several books which were eventually accepted, such as: The Epistle to the Hebrews, 2 Peter, 3 John and the Revelation of John (Apocalypse). None of those accepted books can be considered Apocryphal now, since all Christendom accepts them as canonical. Of the uncanonized ones, the Early Church considered some heretical but viewed others quite well. Some Christians, in an extension of the meaning, might also consider the non-heretical books to be "apocryphal" along the manner of Martin Luther: not canon, but useful to read. This category includes books such as the Epistle of Barnabas, the Didache, and The Shepherd of Hermas which are sometimes referred to as the Apostolic Fathers. The Gnostic tradition was a prolific source of apocryphal gospels. While these writings borrowed the characteristic poetic features of apocalyptic literature from Judaism, Gnostic sects largely insisted on allegorical interpretations based on a secret apostolic tradition. With them, these apocryphal books were highly esteemed. A well-known Gnostic apocryphal book is the Gospel of Thomas, the only complete text of which was found in the Egyptian town of Nag Hammadi in 1945. The Gospel of Judas, a Gnostic gospel, also received much media attention when it was reconstructed in 2006. Roman Catholics, Eastern Orthodox, and Protestants all agree on the canon of the New Testament. The Ethiopian Orthodox have in the past also included I & II Clement and Shepherd of Hermas in their New Testament canon. List of Sixty The List of Sixty, dating to around the 7th century, lists the sixty books of the Bible. The unknown author also lists several apocryphal books that are not included amongst the sixty. These books are: Adam Enoch Lamech Twelve Patriarchs Prayer of Joseph Eldad and Modad Testament of Moses Assumption of Moses Psalms of Solomon Apocalypse of Elijah Ascension of Isaiah Apocalypse of Zephaniah Apocalypse of Zechariah Apocalyptic Ezra History of James Apocalypse of Peter Itinerary and Teaching of the Apostles Epistle of Barnabas Acts of Paul Apocalypse of Paul Didascalia of Clement Didascalia of Ignatius Didascalia of Polycarp Gospel According to Barnabas Gospel According to Matthew Taoism Prophetic texts called the Ch'an-wei were written by Han Dynasty (206 BC to AD 220) Taoist priests to legitimize as well as curb imperial power. They deal with treasure objects that were part of the Zhou (1066 to 256 BC) royal treasures. Emerging from the instability of the Warring States period (476–221 BC), ancient Chinese scholars saw the centralized rule of the Zhou as an ideal model for the new Han empire to emulate. The Ch'an-wei are texts written by Han scholars about the Zhou royal treasures, only they were not written to record history for its own sake, but for legitimizing the current imperial reign. These texts took the form of stories about texts and objects being conferred upon the Emperors by Heaven and comprising these ancient sage-king's (this is how the Zhou emperors were referred to by this time, about 500 years after their peak) royal regalia. The desired effect was to confirm the Han emperor's Heavenly Mandate through the continuity offered by his possession of these same sacred talismans. It is because of this politicized recording of their history that it is difficult to retrace the exact origins of these objects. What is known is that these texts were most likely produced by a class of literati called the fangshi. These were a class of nobles who were not part of the state administration; they were considered specialists or occultists, for example diviners, astrologers, alchemists or healers. It is from this class of nobles that the first Taoist priests are believed to have emerged. Seidel points out however that the scarcity of sources relating to the formation of early Taoism make the exact link between the apocryphal texts and the Taoist beliefs unclear. See also List of Gospels Lost work Occult Shakespeare apocrypha Notes References Citations Sources External links Alin Suciu's blog on various Coptic apocrypha The Apocrypha is in the religion section at the e.Lib. Noncanonical Literature Complete NT Apocrypha Claims to be the largest collection of New Testament apocrypha online Deuterocanonical books - Full text from Saint Takla Haymanot Church Website (also presents the full text in Arabic) LDS Bible Dictionary - Apocrypha – Definition & LDS POV, including brief book descriptions. Aldenicum The Trilogy, an apocryphal view on life and reality around us. Christian Cyclopedia article on Apocrypha New Testament Allusions to Apocrypha and Pseudepigrapha Canon Comparison Chart EarlyChristianWritings.com A chronological list of early Christian books and letters, both complete and incomplete works; canonical, apocryphal and Gnostic. Many with links to English translations. Christian terminology

1291

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

Antarctic Treaty System

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

29003619

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

Telebasis

Telebasis is a genus of damselflies in the family Coenagrionidae. The genus occurs in the Neotropics. Most of the species are red with a few blue species in South America. This genus contains the following species: References Coenagrionidae Zygoptera genera Taxa named by Edmond de Sélys Longchamps

1293

https://en.wikipedia.org/wiki/Alfred%20Lawson

Alfred Lawson

Alfred William Lawson (March 24, 1869 – November 29, 1954) was an English born professional baseball player, aviator and utopian philosopher. He was a baseball player, manager, and league promoter from 1887 through 1916 and went on to play a pioneering role in the U.S. aircraft industry. He published two early aviation trade journals. He is frequently cited as the inventor of the airliner and was awarded several of the first air mail contracts, which he ultimately could not fulfill. He founded the Lawson Aircraft Company in Green Bay, Wisconsin, to build military training aircraft and later the Lawson Airplane Company in South Milwaukee, Wisconsin, to build airliners. The crash of his ambitious Lawson L-4 "Midnight Liner" during its trial flight takeoff on May 8, 1921, ended his best chance for commercial aviation success. In 1904, he wrote a utopian novel, Born Again, in which he developed the philosophy which later became Lawsonomy. Baseball career (1888–1907) He made one start for the Boston Beaneaters and two for the Pittsburgh Alleghenys during the 1890 season. His minor league playing career lasted through 1895. He later managed in the minors from 1905 to 1907. Union Professional League In 1908, he started a new professional baseball league known as the Union Professional League. The league took the field in April but folded one month later owing to financial difficulties. Aviation career (1908–1928) An early advocate or rather evangelist of aviation, in October 1908 Lawson started the magazine Fly to stimulate public interest and educate readers in the fundamentals of the new science of aviation. It sold for 10 cents a copy from newsstands across the country. In 1910, moving to New York City, he renamed the magazine Aircraft and published it until 1914. The magazine chronicled the technical developments of the early aviation pioneers. Lawson was the first advocate for commercial air travel, coining the term "airline." He also advocated for a strong American flying force, lobbying Congress in 1913 to expand its appropriations for Army aircraft. In early 1913, he learned to fly the Sloan-Deperdussin and the Moisant-Bleriot monoplanes, becoming an accomplished pilot. Later that year he bought a Thomas flying boat and became the first air commuter regularly flying from his country house in Seidler's Beach, New Jersey, to the foot of 75th Street in New York City (about 35 miles). In 1917, utilizing the knowledge gained from ten years of advocating aviation, he built his first airplane, the Lawson Military Tractor 1 (MT-1) trainer, and founded the Lawson Aircraft Corporation. The company's plant was sited at Green Bay, Wisconsin. There he secured a contract and built the Lawson MT-2. He also designed the steel fuselage Lawson Armored Battler, which never got beyond the drafting board, given doubts within the Army aviation community and the signing of the armistice. After the war, in 1919 Lawson started a project to build America's first airline. He secured financial backing, and in five months he had built and demonstrated in flight his biplane airliner, the 18-passenger Lawson L-2. He demonstrated its capabilities in a 2000-mile multi-city tour from Milwaukee to Chicago-Toledo-Cleveland-Buffalo-Syracuse-New york City-Washington, D.C.-Collinsville-Dayton-Chicago and back to Milwaukee, creating a buzz of positive press. The publicity allowed him to secure an additional $1 million to build the 26-passenger Midnight Liner. The aircraft crashed on takeoff on its maiden flight. In late 1920, he secured government contracts for three airmail routes and to deliver ten war planes, but owing to the fall 1920 recession, he could not secure the necessary $100,000 in cash reserves called for in the contracts and had to decline them. In 1926, he started his last airliner, the 56-seat, two-tier Lawson super airliner. In this phase of his life, he was considered one of the leading thinkers in the budding American commercial aviation community, but his troubles with getting financial backing for his ideas led him to turn to economics, philosophy, and organization. Lawsonomy (1929–1954) In the 1920s, Lawson promoted health practices, including vegetarianism, and claimed to have found the secret of living to 200. He also developed his own highly unusual theories of physics, according to which such concepts as "penetrability", "suction and pressure" and "zig-zag-and-swirl" were discoveries on par with Einstein's theory of relativity. He published numerous books on these concepts, all set in a distinctive typography. He later propounded his own philosophy, Lawsonomy, and the Lawsonian religion. He also developed, during the Great Depression, the populist economic theory of "Direct Credits", according to which banks are the cause of all economic woes, the oppressors of both capital and labour. Lawson believed that the government should replace banks as the provider of loans to business and workers. He predicted the worldwide adoption of Lawsonian principles once "everybody understands this subject". His rallies and lectures attracted thousands of listeners in the early 1930s, mainly in the upper Midwest, but by the late 1930s the crowds had dwindled. His claims about his own greatness became increasingly hyperbolic. The Lawsonomy trilogy, considered by Lawson himself to be his intellectual masterpiece, is full of such self-referential statements as "About every two thousand years a new teacher with advanced intellectual equipment appears upon earth to lead the people a step or two nearer the one God of everybody". In 1943, he founded the Humanity Benefactor Foundation and University of Lawsonomy in Des Moines, on the site of Des Moines University, to spread his teachings and offer the degree of "Knowledgian", but after various IRS and other investigations it was closed and finally sold in 1954, the year of Lawson's death. His financial arrangements remain mysterious to this day, and in later years he seems to have owned little property, moving from city to city as a guest of his farflung acolytes. In 1952, he was brought before a United States Senate investigative committee on allegations that his organization had bought war surplus machines and then sold them for a profit, despite claiming non-profit status. His attempt to explain Lawsonomy to the senators ended in mutual frustration and bafflement. A farm near Racine, Wisconsin, is the only remaining university facility, although a tiny handful of churches may yet survive in places such as Wichita, Kansas. The large sign, formerly reading "University of Lawsonomy", was a familiar landmark for motorists in the region for many years and was visible from Interstate 94 about north of the Illinois state line, on the east side of the highway. A storm in the spring of 2009 destroyed the sign, although the supporting posts are still visible. On the northbound side of Interstate 94, a sign on the roof of the building nearest the freeway said "Study Natural Law" until being shingled over in October 2014. In 2018, the Town of Mount Pleasant paid $933,000 to purchase the property on the northbound side of Interstate 94 for the Foxconn project. All remaining buildings were demolished and removed. Lawsonomy maintains a small following to this day. See also List of topics characterized as pseudoscience References Further reading Henry, Lyell D. Zig-Zag-and Swirl: Alfred W. Lawson's Quest for Greatness. Iowa City: University of Iowa Press, 1991. Kossy, Donna. Kooks: A Guide to the Outer Limits of Human Belief. 2nd ed. Los Angeles: Feral House, 2001. Kuntz, Jerry. Baseball Fiends and Flying Machines: The Many Lives and Outrageous Times of George and Alfred Lawson. Jefferson, North Carolina: McFarland Publishing, 2009. Lawson, Alfred. Lawsonomy, vols. 1-3. Detroit: Humanity Benefactor Foundation, 1935–1939. External links Lawson Demo Flight Departed 93 Years Ago at Wisconsin Aviation Hall of Fame What in the heck is the University of Lawsonomy? – article about Lawson in a Milwaukee-area magazine End of flight – newspaper article about 1921 loss of first Lawson Airliner "ASME Milwaukee – History & Heritage" The Alfred W. Lawson papers at the American Heritage Center 1869 births 1954 deaths Lawsonomy Boston Beaneaters players Pittsburgh Alleghenys players Major League Baseball pitchers 19th-century baseball players Bloomington Blues players Wilmington Blue Hens players Harrisburg Ponies players Oakland Colonels players Pendleton Ho Hos players Spokane Bunchgrassers players Atlanta Firecrackers players Troy Trojans (minor league) players Sandusky Sandies players Albany Senators players Pawtucket Maroons players Norfolk Clams players Norfolk Crows players Sportspeople from London Minor league baseball managers Major League Baseball players from the United Kingdom Major League Baseball players from England English baseball players Fitchburg (minor league baseball) players Cobleskill Giants players

1298

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

Ames, Iowa

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

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

Abalone

Abalone ( or ; via Spanish , from Rumsen aulón) is a common name for any of a group of small to very large marine gastropod molluscs in the family Haliotidae. Other common names are ear shells, sea ears, and, rarely, muttonfish or muttonshells in parts of Australia, ormer in the UK, perlemoen in South Africa, and paua in New Zealand. Abalones are marine snails. Their taxonomy puts them in the family Haliotidae, which contains only one genus, Haliotis, which once contained six subgenera. These subgenera have become alternate representations of Haliotis. The number of species recognized worldwide ranges between 30 and 130 with over 230 species-level taxa described. The most comprehensive treatment of the family considers 56 species valid, with 18 additional subspecies. The shells of abalones have a low, open spiral structure, and are characterized by several open respiratory pores in a row near the shell's outer edge. The thick inner layer of the shell is composed of nacre (mother-of-pearl), which in many species is highly iridescent, giving rise to a range of strong, changeable colors which make the shells attractive to humans as decorative objects, jewelry, and as a source of colorful mother-of-pearl. The flesh of abalones is widely considered to be a desirable food, and is consumed raw or cooked by a variety of cultures. Description Most abalone vary in size from (Haliotis pulcherrima) to . The largest species, Haliotis rufescens, reaches . The shell of abalones is convex, rounded to oval in shape, and may be highly arched or very flattened. The shell of the majority of species has a small, flat spire and two to three whorls. The last whorl, known as the body whorl, is auriform, meaning that the shell resembles an ear, giving rise to the common name "ear shell". Haliotis asinina has a somewhat different shape, as it is more elongated and distended. The shell of Haliotis cracherodii cracherodii is also unusual as it has an ovate form, is imperforate, shows an exserted spire, and has prickly ribs. A mantle cleft in the shell impresses a groove in the shell, in which are the row of holes characteristic of the genus. These holes are respiratory apertures for venting water from the gills and for releasing sperm and eggs into the water column. They make up what is known as the selenizone, which forms as the shell grows. This series of eight to 38 holes is near the anterior margin. Only a small number is generally open. The older holes are gradually sealed up as the shell grows and new holes form. Each species has a typical number of open holes, between four and 10, in the selenizone. An abalone has no operculum. The aperture of the shell is very wide and nacreous. The exterior of the shell is striated and dull. The color of the shell is very variable from species to species, which may reflect the animal's diet. The iridescent nacre that lines the inside of the shell varies in color from silvery white, to pink, red and green-red to deep blue, green to purple. The animal has fimbriated head lobes and side lobes that are fimbriated and cirrated. The radula has small median teeth, and the lateral teeth are single and beam-like. They have about 70 uncini, with denticulated hooks, the first four very large. The rounded foot is very large in comparison to most molluscs. The soft body is coiled around the columellar muscle, and its insertion, instead of being on the columella, is on the middle of the inner wall of the shell. The gills are symmetrical and both well developed. These snails cling solidly with their broad, muscular foot to rocky surfaces at sublittoral depths, although some species such as Haliotis cracherodii used to be common in the intertidal zone. Abalones reach maturity at a relatively small size. Their fecundity is high and increases with their size, laying from 10,000 to 11 million eggs at a time. The spermatozoa are filiform and pointed at one end, and the anterior end is a rounded head. The adults provide no further assistance to the larvae and they are described as lecithotrophic. The adults are herbivorous and feed with their rhipidoglossan radula on macroalgae, preferring red or brown algae. Distribution The haliotid family has a worldwide distribution, along the coastal waters of every continent, except the Pacific coast of South America, the Atlantic coast of North America, the Arctic, and Antarctica. The majority of abalone species are found in cold waters, such as off the coasts of New Zealand, South Africa, Australia, Western North America, and Japan. Structure and properties of the shell The shell of the abalone is exceptionally strong and is made of microscopic calcium carbonate tiles stacked like bricks. Between the layers of tiles is a clingy protein substance. When the abalone shell is struck, the tiles slide instead of shattering and the protein stretches to absorb the energy of the blow. Material scientists around the world are studying this tiled structure for insight into stronger ceramic products such as body armor. The dust created by grinding and cutting abalone shell is dangerous; appropriate safeguards must be taken to protect people from inhaling these particles. Diseases and pests Abalones are subject to various diseases. The Victorian Department of Primary Industries said in 2007 that ganglioneuritis killed up to 90% of stock in affected regions. Abalone are also severe hemophiliacs as their fluids will not clot in the case of a laceration or puncture wound. Members of the Spionidae of the polychaetes are known as pests of abalone. Human use Abalone has been harvested worldwide for centuries as a source of food and decorative items. Abalone shells and associated materials, like their claw-like pearls and nacre, have been used as jewelry and for buttons, buckles, and inlay. These shells have been found in archaeological sites around the world, ranging from 100,000-year-old deposits at Blombos Cave in South Africa to historic Chinese abalone middens on California's Northern Channel Islands. For at least 12,000 years, abalones were harvested to such an extent around the Channel Islands that shells in the area decreased in size four thousand years ago. Farming Farming of abalone began in the late 1950s and early 1960s in Japan and China. Since the mid-1990s, there have been many increasingly successful endeavors to commercially farm abalone for the purpose of consumption. Overfishing and poaching have reduced wild populations to such an extent that farmed abalone now supplies most of the abalone meat consumed. The principal abalone farming regions are China, Taiwan, Japan, and Korea. Abalone is also farmed in Australia, Canada, Chile, France, Iceland, Ireland, Mexico, Namibia, New Zealand, South Africa, Spain, Thailand, and the United States. After trials in 2012, a commercial "sea ranch" was set up in Flinders Bay, Western Australia to raise abalone. The ranch is based on an artificial reef made up of 5,000 separate concrete abalone habitat units, which can host 400 abalone each. The reef is seeded with young abalone from an onshore hatchery. The abalone feed on seaweed that grows naturally on the habitats; the ecosystem enrichment of the bay also results in growing numbers of dhufish, pink snapper, wrasse, and Samson fish among other species. Consumption Abalones have long been a valuable food source for humans in every area of the world where a species is abundant. The meat of this mollusc is considered a delicacy in certain parts of Latin America (particularly Chile), France, New Zealand, East Asia and Southeast Asia. In the Greater China region and among Overseas Chinese communities, abalone is commonly known as bao yu, and sometimes forms part of a Chinese banquet. In the same way as shark fin soup or bird's nest soup, abalone is considered a luxury item, and is traditionally reserved for special occasions such as weddings and other celebrations. As abalone became more popular and less common, the prices adjusted accordingly. In the 1920s, a restaurant-served portion of abalone, about 4 ounces, would cost (in inflation adjusted dollars) about US$7; by 2004, the price had risen to US$75. In the United States, prior to this time, abalone was predominantly eaten, gathered, and prepared by Chinese immigrants. Before that, abalone were collected to be eaten, and used for other purposes by Native American tribes. By 1900, laws were passed in California to outlaw the taking of abalone above the intertidal zone. This forced the Chinese out of the market and the Japanese perfected diving, with or without gear, to enter the market. Abalone started to become popular in the USA after the Panama–Pacific International Exposition in 1915, which exhibited 365 varieties of fish with cooking demonstrations, and a 1300-seat dining hall. In Japan, live and raw abalones are used in awabi sushi, or served steamed, salted, boiled, chopped, or simmered in soy sauce. Salted, fermented abalone entrails are the main component of tottsuru, a local dish from Honshū. Tottsuru is mainly enjoyed with sake. In South Korea, abalone is called Junbok (/juhn-bok/) and used in various recipes. Junbok porridge and Pan-fried abalone steak with butter are popular but also commonly used in soups or ramyun. In California, abalone meat can be found on pizza, sautéed with caramelized mango, or in steak form dusted with cracker meal and flour. Sport harvesting Australia Tasmania supplies about 25% of the yearly world abalone harvest. Around 12,500 Tasmanians recreationally fish for blacklip and greenlip abalone. For blacklip abalone, the size limit varies between for the southern end of the state and for the northern end of the state. Greenlip abalones have a minimum size of , except for an area around Perkins Bay in the north of the state where the minimum size is . With a recreational abalone licence, the bag limit is 10 per day, with a total possession limit of 20. Scuba diving for abalone is allowed, and has a rich history in Australia. (Scuba diving for abalone in the states of New South Wales and Western Australia is illegal; a free-diving catch limit of two is allowed). Victoria has had an active abalone fishery since the late 1950s. The state is sectioned into three fishing zones, Eastern, Central and Western, with each fisher required a zone-allocated licence. Harvesting is performed by divers using surface-supplied air "hookah" systems operating from runabout-style, outboard-powered boats. While the diver seeks out colonies of abalone amongst the reef beds, the deckhand operates the boat, known as working "live" and stays above where the diver is working. Bags of abalone pried from the rocks are brought to the surface by the diver or by way of "shot line", where the deckhand drops a weighted rope for the catch bag to be connected then retrieved. Divers measure each abalone before removing from the reef and the deckhand remeasures each abalone and removes excess weed growth from the shell. Since 2002, the Victorian industry has seen a significant decline in catches, with the total allowable catch reduced from 1440 to 787 tonnes for the 2011/12 fishing year, due to dwindling stocks and most notably the abalone virus ganglioneuritis, which is fast-spreading and lethal to abalone stocks. United States Sport harvesting of red abalone is permitted with a California fishing license and an abalone stamp card. In 2008, the abalone card also came with a set of 24 tags. This was reduced to 18 abalone per year in 2014, and as of 2017 the limit has been reduced to 12, only nine of which may be taken south of Mendocino County. Legal-size abalone must be tagged immediately. Abalone may only be taken using breath-hold techniques or shorepicking; scuba diving for abalone is strictly prohibited. Taking of abalone is not permitted south of the mouth of San Francisco Bay. A size minimum of measured across the shell is in place. A person may be in possession of only three abalone at any given time. As of 2017, abalone season is May to October, excluding July. Transportation of abalone may only legally occur while the abalone is still attached in the shell. Sale of sport-obtained abalone is illegal, including the shell. Only red abalone may be taken, as black, white, pink, flat, green, and pinto abalone are protected by law. In 2018, The California Fish and Game Commission closed recreational abalone season due to dramatically declining populations. That year, they extended the moratorium to last through April 2021. An abalone diver is normally equipped with a thick wetsuit, including a hood, bootees, and gloves, and usually also a mask, snorkel, weight belt, abalone iron, and abalone gauge. Alternatively, the rock picker can feel underneath rocks at low tides for abalone. Abalone are mostly taken in depths from a few inches up to ; less common are freedivers who can work deeper than . Abalone are normally found on rocks near food sources such as kelp. An abalone iron is used to pry the abalone from the rock before it has time to fully clamp down. Divers dive from boats, kayaks, tube floats, or directly off the shore. The largest abalone recorded in California is , caught by John Pepper somewhere off the coast of San Mateo County in September 1993. The mollusc Concholepas concholepas is often sold in the United States under the name "Chilean abalone", though it is not an abalone, but a muricid. New Zealand In New Zealand, abalone is called paua (, from the Māori language). Haliotis iris (or blackfoot paua) is the ubiquitous New Zealand paua, the highly polished nacre of which is extremely popular as souvenirs with its striking blue, green, and purple iridescence. Haliotis australis and Haliotis virginea are also found in New Zealand waters, but are less popular than H. iris. Like all New Zealand shellfish, recreational harvesting of paua does not require a permit provided catch limits, size restrictions, and seasonal and local restrictions set by the Ministry for Primary Industries (MPI) are followed. The legal recreational daily limit is 10 per diver, with a minimum shell length of for H. iris and for H. australis. In addition, no person may be in possession, even on land, of more than 20 paua or more than of paua meat at any one time. Paua can only be caught by free-diving; it is illegal to catch them using scuba gear. An extensive global black market exists in collecting and exporting abalone meat. This can be a particularly awkward problem where the right to harvest paua can be granted legally under Māori customary rights. When such permits to harvest are abused, it is frequently difficult to police. The limit is strictly enforced by roving Ministry for Primary Industries fishery officers with the backing of the New Zealand Police. Poaching is a major industry in New Zealand with many thousands being taken illegally, often undersized. Convictions have resulted in seizure of diving gear, boats, and motor vehicles and fines and in rare cases, imprisonment. South Africa The largest abalone in South Africa, Haliotis midae, occurs along roughly two-thirds of the country's coastline. Abalone-diving has been a recreational activity for many years, but stocks are currently being threatened by illegal commercial harvesting. In South Africa, all persons harvesting this shellfish need permits that are issued annually, and no abalone may be harvested using scuba gear. For the last few years, however, no permits have been issued for collecting abalone, but commercial harvesting still continues as does illegal collection by syndicates. In 2007, because of widespread poaching of abalone, the South African government listed abalone as an endangered species according to the CITES section III appendix, which requests member governments to monitor the trade in this species. This listing was removed from CITES in June 2010 by the South African government and South African abalone is no longer subject to CITES trade controls. Export permits are still required, however. The abalone meat from South Africa is prohibited for sale in the country to help reduce poaching; however, much of the illegally harvested meat is sold in Asian countries. As of early 2008, the wholesale price for abalone meat was approximately US$40.00 per kilogram. There is an active trade in the shells, which sell for more than US$1,400 per tonne. Channel Islands, Brittany and Normandy Ormers (Haliotis tuberculata) are considered a delicacy in the British Channel Islands as well as in adjacent areas of France, and are pursued with great alacrity by the locals. This, and a recent lethal bacterial disease, has led to a dramatic depletion in numbers since the latter half of the 19th century, and "ormering" is now strictly regulated to preserve stocks. The gathering of ormers is now restricted to a number of 'ormering tides', from 1 January to 30 April, which occur on the full or new moon and two days following. No ormers may be taken from the beach that are under in shell length. Gatherers are not allowed to wear wetsuits or even put their heads underwater. Any breach of these laws is a criminal offence and can lead to a fine of up to £5,000 or six months in prison. The demand for ormers is such that they led to the world's first underwater arrest, when Mr. Kempthorne-Leigh of Guernsey was arrested by a police officer in full diving gear when illegally diving for ormers. Decorative items The highly iridescent inner nacre layer of the shell of abalone has traditionally been used as a decorative item, in jewelry, buttons, and as inlay in furniture and musical instruments, such as on fret boards and binding of guitars. Indigenous use Abalone has been an important staple in a number of Indigenous cultures around the world, specifically in Africa and on the Northwest American coast. The meat is a traditional food, and the shell is used to make ornaments; historically, the shells were also used as currency in some communities. Threat of extinction Abalones are one of the many classes of organism threatened with extinction due to overfishing and the acidification of oceans from anthropogenic carbon dioxide, as reduced pH erodes their shells. In the 21st century, white, pink, and green abalone are on the United States federal endangered species list, and possible restoration sites have been proposed for the San Clemente Island and Santa Barbara Island areas. The possibility of farming abalone to be reintroduced into the wild has also been proposed, with these abalone having special tags to help track the population. Species The number of species that are recognized within the genus Haliotis has fluctuated over time, and depends on the source that is consulted. The number of recognized species range from 30 to 130. This list finds a compromise using the WoRMS database, plus some species that have been added, for a total of 57. The majority of abalone have not been rated for conservation status. Those that have been reviewed tend to show that the abalone in general is an animal that is declining in numbers, and will need protection throughout the globe. Synonyms See also List of delicacies Citations References Further reading External links Abalone: Species Diversity ABMAP: The Abalone Mapping Project Abalone biology Conchology Hardy's Internet Guide to Marine Gastropods : Shell Catalog book on crafting with Abalone Shell Fisheries Western Australia – Abalone Fact Sheet Imagemap of worldwide abalone distribution Oman’s Abalone Harvest Pro abalone diver, Mallacoota, Victoria (1967) Tathra NSW(1961), Abalone (1963) Fathom magazine "The Abalone Divers" Pages 43,44,45 (1972) Abalone Healing Properties Commercial molluscs Extant Late Cretaceous first appearances Organic gemstones Mollusc common names Taxa named by Carl Linnaeus de:Seeohren ja:アワビ#人間との関わり zh:鮑魚

1301

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

Abbess

An abbess (Latin: abbatissa), also known as a mother superior, is the female superior of a community of Catholic nuns in an abbey. Description In the Catholic Church (both the Latin Church and Eastern Catholic), Eastern Orthodox, Coptic and Anglican abbeys, the mode of election, position, rights, and authority of an abbess correspond generally with those of an abbot. She must be at least 40 years old and have been a nun for 10 years. The age requirement in the Catholic Church has evolved over time, ranging from 30 to 60. The requirement of 10 years as a nun is only eight in Catholicism. In the rare case of there not being a nun with the qualifications, the requirements may be lowered to 30 years of age and five of those in an "upright manner", as determined by the superior. A woman who is of illegitimate birth, is not a virgin, has undergone non-salutory public penance, is a widow, or is blind or deaf, is typically disqualified for the position, saving by permission of the Holy See. The office is elective, the choice being by the secret votes of the nuns belonging to the community. Like an abbot, after being confirmed in her office by the Holy See, an abbess is solemnly admitted to her office by a formal blessing, conferred by the bishop in whose territory the monastery is located, or by an abbot or another bishop with appropriate permission. Unlike the abbot, the abbess receives only the ring, the crosier, and a copy of the rule of the order. She does not receive a mitre as part of the ceremony. The abbess also traditionally adds a pectoral cross to the outside of her habit as a symbol of office, though she continues to wear a modified form of her religious habit or dress, as she is unordained—females cannot be ordained—and so does not vest or use choir dress in the liturgy. An abbess serves for life, except in Italy and some adjacent islands. Roles and responsibilities Abbesses are, like abbots, major superiors according to canon law, the equivalents of abbots or bishops (the ordained male members of the church hierarchy who have, by right of their own office, executive jurisdiction over a building, diocesan territory, or a communal or non-communal group of persons—juridical entities under church law). They receive the vows of the nuns of the abbey; they may admit candidates to their order's novitiate; they may send them to study; and they may send them to do pastoral or missionary, or to work or assist—to the extent allowed by canon and civil law—in the administration and ministry of a parish or diocese (these activities could be inside or outside the community's territory). They have full authority in its administration. However, there are significant limitations. They may not administer the sacraments, whose celebration is reserved to bishops, priests, deacons (clerics), namely, those in Holy Orders. They may make provision for an ordained cleric to help train and to admit some of their members, if needed, as altar servers, extraordinary ministers of Holy Communion, or lectors—all ministries which are now open to the unordained. They may not serve as a witness to a marriage except by special rescript. They may not administer Penance (Reconciliation), Anointing of the Sick (Extreme Unction), or function as an ordained celebrant or concelebrant of the Mass (by virtue of their office and their training and institution, they may act, if the need arises, as altar servers, lectors, ushers, porters, or extraordinary ministers of Holy Communion, and if need be, the Host). They may preside over the Liturgy of the Hours which they are obliged to say with their community, speak on Scripture to their community, and give certain types of blessings not reserved to the clergy. On the other hand, they may not ordinarily preach a sermon or homily, nor read the Gospel during Mass. As they do not receive episcopal ordination in the Catholic, Orthodox and Oriental Churches, they do not possess the ability to ordain others, nor do they exercise the authority they do possess under canon law over any territories outside of their monastery and its territory (though non-cloistered, non-contemplative female religious members who are based in a convent or monastery but who participate in external affairs may assist as needed by the diocesan bishop and local secular clergy and laity, in certain pastoral ministries and administrative and non-administrative functions not requiring ordained ministry or status as a male cleric in those churches or programs). There are exigent circumstances, where due to Apostolical privilege, certain Abbesses have been granted rights and responsibilities above the normal, such as the Abbess of the Cistercian Monastery of the Abbey of Santa María la Real de Las Huelgas near Burgos, Spain. Also granted exceptional rights was the Abbess of the Cistercian order in Conversano Italy. She was granted the ability to appoint her own vicar-general, select and approve the confessors, along with the practice of receiving the public homage of her clergy. This practice continued until some of the duties were modified due to an appeal by the clergy to Rome. Finally in 1750, the public homage was abolished. During the Middle Ages (7th–10th centuries) in the Catholic Church, greater restrictions on abbesses' spiritual independence gained pace. Instruments of church authority, from papal bulls down to local sanctions, were increasingly used to restrict their freedom to dispense blessings, administer sacraments, including the veiling of nuns, and publicly read the gospels or preach. Such spiritual—and even temporal—authority had in earlier church history, largely been unremarkable. As Thomas Oestereich, contributor to the Catholic Encyclopedia (1913), makes clear, abbesses' past spiritual authority was increasingly seen as the "usurpation" of corresponding priestly power, and a solely male privilege. He gives an example of the attitude toward such practice, from the 9th century, which persists in church administrative control into the modern era: Similarly, in 1210, Innocent III (died 1216) expressed his view of the Cistercian Abbesses of Burgos and Palencia in Spain, who preached and heard confessions of their own religious, characterizing these acts as "unheard of, most indecorous, and highly preposterous." History Historically, in some Celtic monasteries, abbesses presided over joint-houses of monks and nuns, the most famous example being Saint Brigid of Kildare's leadership in the founding of the monastery at Kildare in Ireland. This custom accompanied Celtic monastic missions to France, Spain, and even to Rome itself. In 1115, Robert, the founder of Fontevraud Abbey near Chinon and Saumur, France, committed the government of the whole order, men as well as women, to a female superior. In Lutheran churches, the title of abbess () has in some cases survived (for example, in the ) to designate the heads of abbeys which since the Protestant Reformation have continued as monasteries or convents (). These positions continued, merely changing from Catholic to Lutheran. The first to make this change was the Abbey of Quedlinburg, whose last Catholic Abbess died in 1514. These are collegiate foundations, which provide a home and an income for unmarried ladies, generally of noble birth, called canonesses (), or more usually, or . The office of abbess is of considerable social dignity, and in the past, was sometimes filled by princesses of the reigning houses. Until the dissolution of Holy Roman Empire and mediatisation of smaller imperial fiefs by Napoleon, the evangelical Abbess of Quedlinburg was also per officio the head of that state. The last such ruling abbess was Sofia Albertina, Princess of Sweden. The abess Hildegard of Fraunmünster Abbey sat in the Imperial Diet among other princes of the Holy Roman Empire. The oldest women's abbey in Germany is St. Marienthal Abbey of Cistercian nuns, near Ostritz, established during the early 13th century. In the Hradčany of Prague is a Catholic institute whose mistress is titled an Abbess. It was founded in 1755 by the Empress Maria Theresa, and traditionally was responsible for the coronation of the Queen of Bohemia. The Abbess is required to be an Austrian Archduchess. it was estimated the Catholic Church had around 200 presiding abbesses. See also List of abbots and abbesses of Kildare Katharina von Zimmern (1478–1547), last abbess of the Fraumünster Abbey Citations General and cited references Catholic ecclesiastical titles Christian religious occupations Ecclesiastical titles Religious leadership roles

1303

https://en.wikipedia.org/wiki/Abdominal%20surgery

Abdominal surgery

The term abdominal surgery broadly covers surgical procedures that involve opening the abdomen (laparotomy). Surgery of each abdominal organ is dealt with separately in connection with the description of that organ (see stomach, kidney, liver, etc.) Diseases affecting the abdominal cavity are dealt with generally under their own names (e.g. appendicitis). Types The most common abdominal surgeries are described below. Appendectomy: surgical opening of the abdominal cavity and removal of the appendix. Typically performed as definitive treatment for appendicitis, although sometimes the appendix is prophylactically removed incidental to another abdominal procedure. Caesarean section (also known as C-section): a surgical procedure in which one or more incisions are made through a mother's abdomen (laparotomy) and uterus (hysterotomy) to deliver one or more babies, or, rarely, to remove a dead fetus. Inguinal hernia surgery: the repair of an inguinal hernia. Exploratory laparotomy: the opening of the abdominal cavity for direct examination of its contents; for example, to locate a source of bleeding or trauma. It may or may not be followed by repair or removal of the primary problem. Laparoscopy: a minimally invasive approach to abdominal surgery where rigid tubes are inserted through small incisions into the abdominal cavity. The tubes allow introduction of a small camera, surgical instruments, and gases into the cavity for direct or indirect visualization and treatment of the abdomen. The abdomen is inflated with carbon dioxide gas to facilitate visualization and, often, a small video camera is used to show the procedure on a monitor in the operating room. The surgeon manipulates instruments within the abdominal cavity to perform procedures such as cholecystectomy (gallbladder removal), the most common laparoscopic procedure. The laparoscopic method speeds recovery time and reduces blood loss and infection as compared to the traditional "open" method. Complications Complications of abdominal surgery include, but are not limited to: Adhesions (also called scar tissue): complications of postoperative adhesion formation are frequent, they have a large negative effect on patients’ health, and increase workload in clinical practice Bleeding Infection Paralytic ileus: short-term paralysis of the bowel Perioperative mortality, any death occurring within 30 days after surgery Shock Sterile technique, aseptic post-operative care, antibiotics, use of the WHO Surgical Safety Checklist, and vigilant post-operative monitoring greatly reduce the risk of these complications. Planned surgery performed under sterile conditions is much less risky than that performed under emergency or unsterile conditions. The contents of the bowel are unsterile, and thus leakage of bowel contents, as from trauma, substantially increases the risk of infection. Globally, there are few studies comparing perioperative mortality following abdominal surgery across different health systems. One major prospective study of 10,745 adult patients undergoing emergency laparotomy from 357 centres in 58 high-, middle-, and low-income countries found that mortality is three times higher in low- compared with high-HDI countries even when adjusted for prognostic factors. In this study the overall global mortality rate was 1.6 percent at 24 hours (high 1.1 percent, middle 1.9 percent, low 3.4 percent), increasing to 5.4 percent by 30 days (high 4.5 percent, middle 6.0 percent, low 8.6 percent). Of the 578 patients who died, 404 (69.9 percent) did so between 24 hours and 30 days following surgery (high 74.2 percent, middle 68.8 percent, low 60.5 percent). Patient safety factors were suggested to play an important role, with use of the WHO Surgical Safety Checklist associated with reduced mortality at 30 days. Taking a similar approach, a unique global study of 1,409 children undergoing emergency laparotomy from 253 centres in 43 countries showed that adjusted mortality in children following surgery may be as high as 7 times greater in low-HDI and middle-HDI countries compared with high-HDI countries, translating to 40 excess deaths per 1,000 procedures performed in these settings. Internationally, the most common operations performed were appendectomy, small bowel resection, pyloromyotomy and correction of intussusception. After adjustment for patient and hospital risk factors, child mortality at 30 days was significantly higher in low-HDI (adjusted OR 7.14 (95% CI 2.52 to 20.23)) and middle-HDI (4.42 (1.44 to 13.56)) countries compared with high-HDI countries. Absorption of drugs administered orally was shown to be significantly affected following abdominal surgery. There is low-certainty evidence that there is no difference between using scalpel and electrosurgery in infection rates during major abdominal surgeries. See also Abdominoplasty ASA physical status classification system or perioperative physical fitness Diabetes General surgery Laparotomy Low-fiber/low-residue diet Perioperative mortality References Surgical specialties General surgery

1304

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

Abduction

Abduction may refer to: Media Film and television "Abduction" (The Outer Limits), a 2001 television episode "Abduction" (Death Note) a Japanese animation television series "Abductions" (Totally Spies!), a 2002 episode of an animated television series "The Abduction" (Alias), a 2002 television episode "The Abduction" (Dr. Quinn, Medicine Woman), a 1994 television episode Abduction (1975 film), directed by Joseph Zito Abduction (1997 film), directed by Takao Okawara Abduction (2011 film), directed by John Singleton Abduction (2019 film), directed by Ernie Barbarash Abduction: The Megumi Yokota Story, a 2005 American documentary film The Abduction, a 1996 TV movie starring Victoria Principal and Robert Hays Literature Abduction (novel), a 2000 novel by novelist Robin Cook Abduction!, a 2004 novel by Peg Kehret The Abduction, a 1987 novel (Norwegian title Bortførelsen), written in Norwegian by Mette Newth and translated into English by Steven T. Murray and Tiina Nunnally The Abduction, a 1998 novel by J. Robert King Music "Abduction", a 2005 song by Iron Maiden vocalist Bruce Dickinson Abduction, a music label run by members of Sun City Girls Of a person or people Alien abduction, phenomenon of people reporting what they believe to be the real experience of being kidnapped by extraterrestrial beings Bride kidnapping, a practice in which a man abducts the woman he wishes to marry Child abduction, unauthorized removal of a minor from the custody of their guardians Express kidnapping, abduction where a small immediate ransom is demanded International child abduction, form of human trafficking Kidnapping, unlawful confinement of a person against their will Raptio, large scale abduction of women Tiger kidnapping, taking a hostage to force a loved one or associate of the victim to do something Sciences Abduction (anatomy), a type of movement which draws a structure or limb away from the median plane of the body Abductive reasoning, a method of reasoning in logic See also Abducted (disambiguation) Abductor (disambiguation)

1305

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

Abensberg

Abensberg () is a town in the Lower Bavarian district of Kelheim, in Bavaria, Germany, lying around southwest of Regensburg, east of Ingolstadt, northwest of Landshut and north of Munich. It is situated on the river Abens, a tributary of the Danube. Geography The town lies on the Abens river, a tributary of the Danube, around eight kilometres from the river's source. The area around Abensberg is characterized by the narrow valley of the Danube, where the Weltenburg Abbey stands, the valley of the Altmühl in the north, a left tributary of the Danube, and the famous Hallertau hops-planting region in the south. The town is divided into the municipalities of Abensberg, Arnhofen, Holzharlanden, Hörlbach, Offenstetten, Pullach and Sandharland. Divisions Since the administrative reforms in Bavaria in the 1970s, the town also encompasses the following Ortsteile: In the town: Abensberg (main settlement), Aunkofen (civil parish), Badhaus (village) To the east: Gaden (village), See (village), Offenstetten (civil parish) To the north east: Arnhofen (civil parish), Baiern (village), Pullach (civil parish), Kleedorf (village) To the north: Sandharlanden (civil parish), Holzharlanden (civil parish), Buchhof (small hamlet) To the west: Schwaighausen (village), Schillhof (hamlet), Gilla (small hamlet) To the south: Aumühle (small hamlet), Allersdorf (hamlet) To the south east: Lehen (small hamlet), Mitterhörlbach (hamlet), Upper Hörlbach (village), Lower Hörlbach (hamlet) History There had been settlement on this part of the Abens river since long before the High Middle Ages, dating back to Neolithic times. Of particular interest and national importance are the Neolithic flint mines at Arnhofen, where, around 7,000 years ago, Stone Age people made flint, which was fashioned into drills, blades and arrowheads, and was regarded as the steel of the Stone Age. Traces of over 20,000 individuals were found on this site. The modern history of Abensberg, which is often incorrectly compared with that of the third century Roman castra (military outpost) of Abusina, begins with Gebhard, who was the first to mention Abensberg as a town, in the middle of the 12th century. The earliest written reference to the town, under the name of Habensperch, came from this time, in around 1138. Gebhard was from the Babonen clan. In 1256, the castrum of Abensprech was first mentioned, and on 12 June 1348, Margrave Ludwig of Brandenburg, and his brother, Duke Stephen of Bavaria, raised Abensberg to the status of a city, giving it the right to operate lower courts, enclose itself with a wall and hold markets. The wall was built by Count Ulrich III of Abensberg. Some of the thirty-two round towers and eight turrets are still preserved to this day. In the Middle Ages, the people of Abensberg enjoyed a level of autonomy above their lord. They elected a city council, although only a small number of rich families were eligible for election. In around 1390, the Carmelite Monastery of Our Lady of Abensberg was founded by Count John II and his wife, Agnes. Although Abensberg was an autonomous city, it remained dependent on the powerful Dukes of Bavaria. The last Lord of Abensberg, Niclas, Graf von Abensberg, supposedly named after his godfather, Nicholas of Kues, a Catholic cardinal, was murdered in 1485 by Christopher, a Duke of Bavaria-Munich. The year before, Niclas had unchivalrously taken Christopher captive as he bathed before a tournament in Munich. Although Christopher renounced his claim for revenge, he lay in wait for Niclas in Freising. When the latter arrived, he was killed by Seitz von Frauenberg. He is buried in the former convent of Abensberg. Abensberg then lost its independence and became a part of the Duchy of Bavaria, and from then on was administered by a ducal official, the so-called caretaker. The castle of Abensberg was destroyed during the Thirty Years' War, although the city had bought a guarantee of protection from the Swedish general, Carl Gustaf Wrangel. During the War of the Spanish Succession emperor Leopold I, who had occupied Bavaria, granted the fief of Abensberg to count Ernst von Abensperg und Traun (1608–1668) from an Austrian noble family named Traun that now received the name of the former counts of Abensberg (who were believed to be distant relatives). After the occupation ended, he was however dispossessed. Johannes Aventinus (1477–1534) is the city's most famous son, the founder of the study of history in Bavaria. Aventinus, whose name was real name is Johann or Johannes Turmair (Aventinus being the Latin name of his birthplace) wrote the Annals of Bavaria, a valuable record of the early history of Germany and the first major written work on the subject. He is commemorated in the Walhalla temple, a monument near Regensburg to the distinguished figures of German history. Until 1800, Abensberg was a municipality belonging to the Straubing district of the Electorate of Bavaria. Abensberg also contained a magistrates' court. In the Battle of Abensberg on 19–20 April 1809, Napoleon gained a significant victory over the Austrians under Archduke Ludwig of Austria and General Johann von Hiller. Coat of arms The arms of the city are divided into two halves. On the left are the blue and white rhombuses of Bavaria, while the right half is split into two silver and black triangles. Two diagonally-crossed silver swords with golden handles rest on top. The town has had a coat of arms since 1338, that of the Counts of Abensberg. With the death of the last Count, Nicholas of Abensberg, in 1485, the estates fell to the Duchy of Bavaria-Munich, meaning that henceforth only the Bavarian coat of arms was ever used. On 31 December 1809, a decree of King Maximilian of Bavaria granted the city a new coat of arms, as a recognition of their (mainly humanitarian and logistic) services in the Battle of Abensberg the same year. The diagonally divided field in silver and black came from the old crest of the Counts of Abensberg, while the white and blue diamonds came from that of the House of Wittelsbach, the rulers of Bavaria. The swords recall the Battle of Abensberg. The district of Offenstetten previously possessed its own coat of arms. Twinning Parga, Greece since 1986 Lonigo, Italy since 1999 Economy and Infrastructure The area around Abensberg, the so-called sand belt between Siegburg, Neustadt an der Donau, Abensberg and Langquaid, is used for the intensive farming of asparagus, due to the optimal soil condition and climate. 212 hectares of land can produce ninety-four asparagus plants. Abensberg asparagus enjoys a reputation among connoisseurs as a particular delicacy. In addition to asparagus, the production of hops plays a major role locally, the region having its own label, and there are still three independent breweries in the area. The town of Abensberg marks the start of the Deutsche Hopfenstraße (German Hops Road), a nickname given to the Bundesstraße 301, a German federal highway which runs through the heartland of Germany's hops-growing industry, ending in Freising. Transport The Abensberg railway station is located on the Regensburg–Ingolstadt railway from Regensburg to Ingolstadt. The city can be reached via the A-93 Holledau-Regensburg road (exit Abensberg). Three Bundesstraße (German federal highways) cross south of Abensberg: B 16, B 299 and B 301. Public facilities Schools Abensberg has a Grundschule (primary school) and Hauptschule (open admission secondary school), and the Johann-Turmair-Realschule (secondary modern school). There is also a College of Agriculture and Home Economics. Since 2007, the Kelheim Berufsschule has had a campus in Abensberg, and outside the state sector is the St. Francis Vocational Training Centre, run by a Catholic youth organisation. Culture and sightseeing Theatre In 2008, a former goods shed by the main railway station of Abensberg was converted into a theatre by local volunteers. The "Theater am Bahnhof" (Theatre at the Railway Station) is mostly used by the Theatergruppe Lampenfieber and was opened on 19 October 2008. Museums Abensberg has a long tradition of museums. In the nineteenth century, Nicholas Stark und Peter Paul Dollinger began a collection based on local history. This collection and the collection of the Heimatverein (local history society) were united in 1963 into the Aventinus Museum, in the cloister of the former Carmelite monastery. On 7 July 2006, the new Town Museum of Abensberg was opened in the former duke's castle in the town. Kuchlbauer Brewery Two blocks west of the Old Town is the Kuchlbauer Brewery and beer garden featuring the Kuchlbauer Tower, a colorful and unconventional observation tower designed by Viennese architect Friedensreich Hundertwasser. The brewery and tower are open to the public. Image gallery Missing memorial Up until the 1950s, Abensberg and the surrounding villages contained a number of graves of victims of a Death March in the Spring of 1945 from the Hersbruck sub-camp of the Dachau concentration camp, who were either murdered by the SS or died of exhaustion. They were originally buried where they died, but were later moved on the orders of the US military government to the cemeteries of their previous homes. At the cemetery in what is now the district of Pullach stood a memorial stone which was mentioned as recently as 1967, but which is no longer at the site. The suffering of ten unknown victims of the camp was recorded on the stone. Regular events The Abensberger events calendar begins in February with the Faschingsgillamoos funfair, which reaches its high point on Mad Thursday. There then follows the Frühjahrsmarkt (Spring market) two weeks before Easter, when all the shops in the town are permitted to open on Sunday (which is normally prohibited in Germany). The Bürgerfest is celebrated on the first weekend of July, when the palace gardens with their ancient walls are transformed into a medieval camp. The Schlossgartenfest (Palace Garden Festival) takes place every year at the beginning of August. It is organised since 1977 by the Junge Union, the youth branch of Germany's two main conservative political parties, the CDU and CSU, and attracts all age groups from Abensberg and surrounding areas. On the second Saturday in August, people can wander through the Night Market in the balmy Summer evening. The Gillamoos, the oldest and largest funfair in the Hallertau opens on the Thursday before the first Sunday in September and runs until the Monday thereafter. It is the highlight of the year in Abensberg and is a celebration of the people of Abensberg and the surrounding area. The Herbstmarkt (autumn market), another Sunday shopping day, is on the first weekend in October. Since 1997, a series of cultural, art, music and entertainment events have taken place in November at various locations in the town, under the title, Novembernebel (November fog) On Saint Nicholas Day (6 December), the Niklasmarkt (Nicholas Market) commemorates the Niklasspende, a medieval foundation for the poor. This heralds the beginning of Advent and the Christmas period. Notable residents Sons and daughters of the town Johannes Aventinus (1477–1534): Bavarian historian Stephan Agricola (1491–1547): Lutheran reformer Joseph von Hazzi (1768–1845): Bavarian Privy Councillor Uwe Brandl (born 1959): Mayor of Abensberg Paul Smaczny: Music and film producer Christian Lohr: Musician and producer Stephan Ebn (born 1978): drummer and music producer Richard Resch: Tenor, classical and opera singer People who have worked in the town Wiguläus von Kreittmayr (1705–1790): by marriage Lord of Offenstetten and Hatzkofen Friedensreich Hundertwasser (1928–2000): artist and architect Radu Ivan (born 1969): International Judo champion Ole Bischof (born 1979): Olympic Judo champion See also Battle of Abensberg occurred April 20, 1809. Battle of Landshut occurred April 21, 1809. Battle of Eckmühl occurred 21–22 April 1809. Eckmühl Landshut References External links Abensberger Impressionen - Old Images of Abensberg Spa towns in Germany Kelheim (district)

1306

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

Arminianism

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

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https://en.wikipedia.org/wiki/The%20Alan%20Parsons%20Project

The Alan Parsons Project

The Alan Parsons Project was a British rock band active between 1975 and 1990, whose core membership consisted of producer, audio engineer, musician and composer Alan Parsons and singer, songwriter and pianist Eric Woolfson. They were accompanied by varying session musicians and some relatively consistent session players such as guitarist Ian Bairnson, arranger Andrew Powell, bassist and vocalist David Paton, drummer Stuart Elliott, and vocalists Lenny Zakatek and Chris Rainbow. Parsons and Woolfson shared writing credits on almost all of the Project's songs, with Parsons producing or co-producing all of the band's recordings. The Alan Parsons Project released eleven studio albums in its 15-year career, the most successful being I Robot (1977) and Eye in the Sky (1982). Many of their albums are conceptual in nature and focus on science fiction, supernatural, literary and sociological themes. Among the group's most popular songs are "I Wouldn't Want to Be Like You", "Games People Play", "Time", "Sirius"/"Eye in the Sky" and "Don't Answer Me". Career 1974–1976: Formation and debut Alan Parsons met Eric Woolfson in the canteen of Abbey Road Studios in the summer of 1974. Parsons acted as Assistant Engineer on the Beatles' albums Abbey Road (1969) and Let It Be (1970), engineered Pink Floyd's The Dark Side of the Moon (1973), and produced several acts for EMI Records. Woolfson, a songwriter and composer, was working as a session pianist while composing material for a concept album based on the work of Edgar Allan Poe. Woolfson's idea was to manage Alan and help his already successful production career. This was the start of their longstanding friendly business relationship. He managed Parsons' career as a producer and engineer through a string of successes, including Pilot, Steve Harley, Cockney Rebel, John Miles, Al Stewart, Ambrosia, and the Hollies. Woolfson came up with the idea of making an album based on developments in the film industry—the focal point of the films' promotion shifted from film stars to directors such as Alfred Hitchcock and Stanley Kubrick. If the film industry was becoming a director's medium, Woolfson felt the music business might well become a producer's medium. Recalling his earlier Edgar Allan Poe material, Woolfson saw a way to combine his and Parsons's talents. Parsons produced and engineered songs written and composed by the two, and the first Alan Parsons Project was begun. The Project's first album, Tales of Mystery and Imagination (1976), released by 20th Century Fox Records and including major contributions by all members of Pilot and Ambrosia, was a success, reaching the Top 40 in the US Billboard 200 chart. The song "The Raven" featured lead vocals by the actor Leonard Whiting. According to the 2007 re-mastered album liner notes, this was the first rock song to use a digital vocoder, with Alan Parsons speaking lyrics through it, although others such as Bruce Haack pioneered this field in the previous decade. 1977–1990: Mainstream success and final releases Arista Records then signed the Alan Parsons Project for further albums. Through the late 1970s and early 1980s, the Project's popularity continued to grow. However, the Project was always more popular in North America, Ibero-America, and Continental Europe than in Parsons' home country, never achieving a UK Top 40 single or Top 20 album. The singles "I Wouldn't Want to Be Like You", "Games People Play", "Damned If I Do", "Time" (the first single to feature Woolfson's lead vocal) and "Eye in the Sky" had a notable impact on the Billboard Hot 100. "Don't Answer Me" became the Project's last successful single in the United States; it reached the top 15 on the American charts in 1984. After those successes, however, the Project began to fade from view. There were fewer hit singles, and declining album sales. 1987's Gaudi would be the Project's final release, though it had planned to record an album called Freudiana (1990) next. The musical Freudiana Even though the studio version of Freudiana was produced by Parsons (and featured the regular Project session musicians, making it an 'unofficial' Project album), it was primarily Woolfson's idea to turn it into a musical. While Parsons pursued his own solo career and took many session players of the Project on the road for the first time in a successful worldwide tour, Woolfson went on to produce musical plays influenced by the Project's music. Freudiana, Gaudi, and Gambler were three musicals that included some Project songs like "Eye in the Sky", "Time", "Inside Looking Out", and "Limelight". The live music from Gambler was only distributed at the performance site in Mönchengladbach, Germany. The Sicilian Defence In 1979, Parsons, Woolfson, and their record label Arista, had been stalled in contract renegotiations when the two submitted an all-instrumental album tentatively titled The Sicilian Defence, named after an aggressive opening move in chess, arguably to get out of their recording contract. Arista's refusal to release the album had two known effects: the negotiations led to a renewed contract, and the album was not released at that time. In interviews he gave before his death in 2009, Woolfson said he planned to release one track from the "Sicilian" album, which in 2008 appeared as a bonus track on a CD re-issue of the Eve album. Sometime later, after he had relocated the original tapes, Parsons reluctantly agreed to release the album and announced that it would finally be released on an upcoming Project box set called The Complete Albums Collection in 2014 for the first time as a bonus disc. Parsons' and Woolfson's solo careers Parsons released titles under his name; these were Try Anything Once (1993), On Air (1996), The Time Machine (1999), A Valid Path (2004) and The Secret (2019). Meanwhile, Woolfson made concept albums titled Freudiana (1990), about Sigmund Freud's work on psychology, and Poe: More Tales of Mystery and Imagination (2003); this continued from the Alan Parsons Project's first album about Edgar Allan Poe's literature. Tales of Mystery and Imagination (1976) was re-mixed in 1987 for release on CD, and included narration by Orson Welles recorded in 1975, but delivered too late to be included on the original album. For the 2007 deluxe edition release, parts of this tape were used for the 1976 Griffith Park Planetarium launch of the original album, the 1987 remix, and various radio spots. All were included as bonus material. Sound The band's sound is described as progressive rock, art rock, progressive pop, and soft rock. "Sirius" is their best-known and most-frequently heard of all Parsons/Woolfson songs. It was used as entrance music by various American sports teams, notably by the Chicago Bulls during their 1990s NBA dynasty. It was also used as the entrance theme for Ricky Steamboat in pro wrestling of the mid-1980s. In addition, "Sirius" is played in a variety of TV shows and movies including the BBC series Record Breakers, the episode "Vanishing Act" of The Adventures of Jimmy Neutron: Boy Genius and the 2009 film Cloudy with a Chance of Meatballs. Vocal duties were shared by guests to complement each song. In later years, Woolfson sang lead on many of the group's hits, including "Time", "Eye in the Sky", and "Don't Answer Me". The record company pressured Parsons to use Woolfson more, but Parsons preferred to use polished proficient singers; Woolfson admitted he was not in that category. In addition to Woolfson, vocalists Chris Rainbow, Lenny Zakatek, John Miles, David Paton, and Colin Blunstone are regulars. Other singers, such as Arthur Brown, Steve Harley, Gary Brooker, Dave Terry a.k.a. Elmer Gantry, Vitamin Z's Geoff Barradale, and Marmalade's Dean Ford, recorded only once or twice with the Project. Parsons sang lead on one song ("The Raven") through a vocoder and backing on a few others, including "To One in Paradise". Both of those songs appeared on Tales of Mystery and Imagination (1976). Parsons also sings a prominent counter melody on “Time”. A variety of session musicians worked with the Alan Parsons Project regularly, contributing to the recognizable style of a song despite the varied singer line-up. With Parsons and Woolfson, the studio band consisted of the group Pilot, with Ian Bairnson (guitar), David Paton (bass) and Stuart Tosh (drums). Pilot's keyboardist Billy Lyall contributed. From Pyramid (1978) onward, Tosh was replaced by Stuart Elliott of Cockney Rebel. Bairnson played on all albums, and Paton stayed almost until the end. Andrew Powell appeared as arranger of orchestra (and often choirs) on all albums except Vulture Culture (1985); he was composing the score of Richard Donner's film Ladyhawke (1985). This score was partly in the APP style, recorded by most of the APP regulars, and produced and engineered by Parsons. Powell composed some material for the first two Project albums. For Vulture Culture and later, Richard Cottle played as a regular contributor on synthesizers and saxophone. The Alan Parsons Project played live only once under that name during its original incarnation because Woolfson and Parsons held the roles of writing and production, and because of the technical difficulties of re-producing on stage the complex instrumentation used in the studio. In the 1990s, musical production evolved with the technology of digital samplers. The one occasion the band was introduced as 'The Alan Parsons Project' in a live performance was at The Night of the Proms in October 1990. The concerts featured all Project regulars except Woolfson, present behind the scenes, while Parsons stayed at the mixer except for the last song, when he played acoustic guitar. Since 1993, Alan Parsons continues to perform live as the Alan Parsons Live Project to be distinct from The Alan Parsons Project. The current line up consists of lead singer P.J. Olsson, guitarist Jeffrey Kollman, drummer Danny Thompson, keyboardist Tom Brooks, bass guitarist Guy Erez, vocalist and saxophonist Todd Cooper, and guitarist and vocalist Dan Tracey. In 2013, Alan Parsons Live Project played Colombia with a full choir and orchestra (the Medellin Philharmonic) as 'Alan Parsons Symphonic Project'. A 2-CD live set and a DVD version of this concert were released in May 2016. Members Official members Alan Parsons – production, engineering, programming, composition, vocals, keyboards, guitars (1975–1990) Eric Woolfson – composition, lyrics, piano, keyboards, vocals, executive production (1975–1990) Notable contributors Andrew Powell – composition, keyboards, orchestral arrangements (1975–1996) Philharmonia Orchestra Ian Bairnson – guitars (1975–1990) David Pack – guitars (1976, 1993), vocals, keyboards (1993) Richard Cottle – keyboards, saxophone (1984–1990) David Paton – bass, vocals (1975–1986) Stuart Tosh – drums, percussion (1975–1977) Stuart Elliott – drums, percussion (1977–1990) Geoff Barradale – vocals (1987) Phil Kenzie – saxophone (1978) Dennis Clarke – saxophone (1980) Colin Blunstone – vocals (1978–1984) Gary Brooker – vocals (1985) Arthur Brown – vocals (1975) Lesley Duncan – vocals (1979) Graham Dye – vocals (1985, 1998) Dean Ford – vocals (1978) Dave Terry ("Elmer Gantry") – vocals (1980, 1982) Jack Harris – vocals (1976–1978) The Hollies – vocals John Miles – vocals (1976, 1978, 1985, 1987, 1990) Chris Rainbow – vocals (1979–1990) Eric Stewart – vocals (1990, 1993) Peter Straker – vocals (1977) Clare Torry – vocals (1979) Dave Townsend – vocals (1977, 1979) Lenny Zakatek – vocals (1977–1987) The English Chorale – choir (1976, 1977, 1982, 1987) Discography Tales of Mystery and Imagination (1976) I Robot (1977) Pyramid (1978) Eve (1979) The Turn of a Friendly Card (1980) Eye in the Sky (1982) Ammonia Avenue (1984) Vulture Culture (1985) Stereotomy (1985) Gaudi (1987) Freudiana (1990 – Austrian Original Cast Musical Soundtrack, virtually a solo Woolfson project) The Sicilian Defence (2014, recorded in 1979) Related The Philharmonia Orchestra Plays the Best of the Alan Parsons Project (1983 – orchestral album by Andrew Powell) Ladyhawke (1985 – soundtrack by Powell, produced and engineered by Parsons) References External links www.The-Alan-Parsons-Project.com The official Eric Woolfson website The Alan Parsons Project albums to be listened as stream at Spotify.com British progressive rock groups British soft rock music groups Arista Records artists Charisma Records artists Progressive pop musicians Soft rock duos Male musical duos

1309

https://en.wikipedia.org/wiki/Almost%20all

Almost all

In mathematics, the term "almost all" means "all but a negligible amount". More precisely, if is a set, "almost all elements of " means "all elements of but those in a negligible subset of ". The meaning of "negligible" depends on the mathematical context; for instance, it can mean finite, countable, or null. In contrast, "almost no" means "a negligible amount"; that is, "almost no elements of " means "a negligible amount of elements of ". Meanings in different areas of mathematics Prevalent meaning Throughout mathematics, "almost all" is sometimes used to mean "all (elements of an infinite set) but finitely many". This use occurs in philosophy as well. Similarly, "almost all" can mean "all (elements of an uncountable set) but countably many". Examples: Almost all positive integers are greater than 1012. Almost all prime numbers are odd (2 is the only exception). Almost all polyhedra are irregular (as there are only nine exceptions: the five platonic solids and the four Kepler–Poinsot polyhedra). If P is a nonzero polynomial, then P(x) ≠ 0 for almost all x (if not all x). Meaning in measure theory When speaking about the reals, sometimes "almost all" can mean "all reals but a null set". Similarly, if S is some set of reals, "almost all numbers in S" can mean "all numbers in S but those in a null set". The real line can be thought of as a one-dimensional Euclidean space. In the more general case of an n-dimensional space (where n is a positive integer), these definitions can be generalised to "all points but those in a null set" or "all points in S but those in a null set" (this time, S is a set of points in the space). Even more generally, "almost all" is sometimes used in the sense of "almost everywhere" in measure theory, or in the closely related sense of "almost surely" in probability theory. Examples: In a measure space, such as the real line, countable sets are null. The set of rational numbers is countable, so almost all real numbers are irrational. Georg Cantor's first set theory article proved that the set of algebraic numbers is countable as well, so almost all reals are transcendental. Almost all reals are normal. The Cantor set is also null. Thus, almost all reals are not in it even though it is uncountable. The derivative of the Cantor function is 0 for almost all numbers in the unit interval. It follows from the previous example because the Cantor function is locally constant, and thus has derivative 0 outside the Cantor set. Meaning in number theory In number theory, "almost all positive integers" can mean "the positive integers in a set whose natural density is 1". That is, if A is a set of positive integers, and if the proportion of positive integers in A below n (out of all positive integers below n) tends to 1 as n tends to infinity, then almost all positive integers are in A. More generally, let S be an infinite set of positive integers, such as the set of even positive numbers or the set of primes, if A is a subset of S, and if the proportion of elements of S below n that are in A (out of all elements of S below n) tends to 1 as n tends to infinity, then it can be said that almost all elements of S are in A. Examples: The natural density of cofinite sets of positive integers is 1, so each of them contains almost all positive integers. Almost all positive integers are composite. Almost all even positive numbers can be expressed as the sum of two primes. Almost all primes are isolated. Moreover, for every positive integer , almost all primes have prime gaps of more than both to their left and their right; that is, there is no other prime between and . Meaning in graph theory In graph theory, if A is a set of (finite labelled) graphs, it can be said to contain almost all graphs, if the proportion of graphs with n vertices that are in A tends to 1 as n tends to infinity. However, it is sometimes easier to work with probabilities, so the definition is reformulated as follows. The proportion of graphs with n vertices that are in A equals the probability that a random graph with n vertices (chosen with the uniform distribution) is in A, and choosing a graph in this way has the same outcome as generating a graph by flipping a coin for each pair of vertices to decide whether to connect them. Therefore, equivalently to the preceding definition, the set A contains almost all graphs if the probability that a coin flip-generated graph with n vertices is in A tends to 1 as n tends to infinity. Sometimes, the latter definition is modified so that the graph is chosen randomly in some other way, where not all graphs with n vertices have the same probability, and those modified definitions are not always equivalent to the main one. The use of the term "almost all" in graph theory is not standard; the term "asymptotically almost surely" is more commonly used for this concept. Example: Almost all graphs are asymmetric. Almost all graphs have diameter 2. Meaning in topology In topology and especially dynamical systems theory (including applications in economics), "almost all" of a topological space's points can mean "all of the space's points but those in a meagre set". Some use a more limited definition, where a subset only contains almost all of the space's points if it contains some open dense set. Example: Given an irreducible algebraic variety, the properties that hold for almost all points in the variety are exactly the generic properties. This is due to the fact that in an irreducible algebraic variety equipped with the Zariski topology, all nonempty open sets are dense. Meaning in algebra In abstract algebra and mathematical logic, if U is an ultrafilter on a set X, "almost all elements of X" sometimes means "the elements of some element of U". For any partition of X into two disjoint sets, one of them will necessarily contain almost all elements of X. It is possible to think of the elements of a filter on X as containing almost all elements of X, even if it isn't an ultrafilter. Proofs See also Almost Almost everywhere Almost surely References Primary sources Secondary sources Mathematical terminology

1313

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

Aromatic compound

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

1315

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

Abbey

An abbey is a type of monastery used by members of a religious order under the governance of an abbot or abbess. Abbeys provide a complex of buildings and land for religious activities, work, and housing of Christian monks and nuns. The concept of the abbey has developed over many centuries from the early monastic ways of religious men and women where they would live isolated from the lay community about them. Religious life in an abbey may be monastic. An abbey may be the home of an enclosed religious order or may be open to visitors. The layout of the church and associated buildings of an abbey often follows a set plan determined by the founding religious order. Abbeys are often self-sufficient while using any abundance of produce or skill to provide care to the poor and needy, refuge to the persecuted, or education to the young. Some abbeys offer accommodation to people who are seeking spiritual retreat. There are many famous abbeys across the Mediterranean Basin and Europe. Monastic origins of the abbey Ascetics and anchorites The earliest known Christian monasteries were groups of huts built near the residence of a famous ascetic or other holy person. Disciples wished to be close to their holy man or woman in order to study their doctrine or imitate their way of life. In the earliest times of Christian monasticism, ascetics would live in social isolation but near a village church. They would subsist whilst donating any excess produce to the poor. However, increasing religious fervor about the ascetic's ways and or persecution of them would drive them further away from their community and further into solitude. For instance, the cells and huts of anchorites (religious recluses) have been found in the deserts of Egypt. In 312 AD, Anthony the Great retired to the Thebaid region of Egypt to escape the persecution of the Emperor Maximian. Anthony was the best known of the anchorites of his time due to his degree of austerity, sanctity and his powers of exorcism. The deeper he withdrew into the wilderness, the more numerous his disciples became. They refused to be separated from him and built their cells close to him. This became a first true monastic community. According to August Neander, Anthony inadvertently became the founder of a new mode of living in common, Coenobitism. Laurae and Coenobia At Tabennae on the Nile, in Upper Egypt, Saint Pachomius laid the foundations for the coenobitical life by arranging everything in an organized manner. He built several monasteries, each with about 1,600 separate cells laid out in lines. These cells formed an encampment where the monks slept and performed some of their manual tasks. There were nearby large halls such as the church, refectory, kitchen, infirmary, and guest house for the monk's common needs. An enclosure protecting all these buildings gave the settlement the appearance of a walled village. This layout, known as the laurae (lanes), became popular throughout Israel. As well as the "laurae", communities known as "caenobia" developed. These were monasteries where monks lived a common life together. The monks were not permitted to retire to the cells of a laurae before they had undergone a lengthy period of training. In time, this form of common life superseded that of the older laurae. In the late 300s AD, Palladius visited the Egyptian monasteries. He described three hundred members of the coenobium of Panopolis. There were fifteen tailors, seven smiths, four carpenters, twelve camel-drivers and fifteen tanners. These people were divided into subgroups, each with its own "oeconomus". A chief steward was at the head of the monastery. The produce of the monastery was brought to Alexandria for sale. The moneys raised were used to purchase stores for the monastery or were given away as charity. Twice in the year, the superiors of several coenobia met at the chief monastery, under the presidency of an "archimandrite" (the "chief of the fold" from the word, "miandra" (a sheepfold)) in order to make their reports. Chrysostom recorded the workings of a coenobia in the vicinity of Antioch. The monks lived in separate huts ("kalbbia") which formed a religious hamlet on the mountainside. They were subject to an abbot, and observed a common rule. Great Lavra, Mount Athos The layout of the monastic coenobium was influenced by a number of factors. These included a need for defence, economy of space, and convenience of access. The layout of buildings became compact and orderly. Larger buildings were erected and defence was provided by strong outside walls. Within the walls, the buildings were arranged around one or more open courts surrounded by cloisters. The usual arrangement for monasteries of the Eastern world is exemplified in the plan of the convent of the Great Lavra at Mount Athos. With reference to the diagram, right, the convent of the Great Lavra is enclosed within a strong and lofty blank stone wall. The area within the wall is between three and four acres (12,000 and 16,000 m2). The longer side is about in length. There is only one entrance, which is located on the north side (A), defended by three iron doors. Near the entrance is a large tower (M), a constant feature in the monasteries of the Levant (Eastern Mediterranean area). There is a small postern gate at L. The enceinte comprises two large open courts, surrounded with buildings connected with cloister galleries of wood or stone. The outer court, which is the larger by far, contains the granaries and storehouses (K), the kitchen (H) and other offices connected with the refectory (G). Immediately adjacent to the gateway is a two-storied guest-house, entered from a cloister (C). The inner court is surrounded by a cloister (EE) from which one enters the monks' cells (II). In the centre of this court stands the katholikon or conventual church, a square building with an apse of the cruciform domical Byzantine type, approached by a domed narthex. In front of the church stands a marble fountain (F), covered by a dome supported on columns. Opening from the western side of the cloister, but actually standing in the outer court, is the refectory (G), a large cruciform (cross shaped) building, about square, decorated within with frescoes of saints. At the upper end is a semicircular recess, similar to the triclinium of the Lateran Palace in Rome, in which is placed the seat of the hegumenos or abbot. This apartment is chiefly used as a meeting place, with the monks usually taking their meals in their separate cells. Adoption of the Roman villa plan Monasticism in the West began with the activities of Benedict of Nursia (born 480 AD). Near Nursia, a town in Perugia, Italy, a first abbey was established at Monte Cassino (529 AD). Between 520 and 700 AD, monasteries were built which were spacious and splendid. All the city states of Italy hosted a Benedictine convent as did the cities of England, France and Spain. By 1415 AD, the time of the Council of Constance, 15,070 Benedictine monasteries had been established. The early Benedictine monasteries, including the first at Monte Cassino, were constructed on the plan of the Roman villa. The layout of the Roman villa was quite consistent throughout the Roman Empire and where possible, the monks reused available villas in sound repair. This was done at Monte Cassino. However, over time, changes to the common villa lay out occurred. The monks required buildings which suited their religious and day-to-day activities. No overriding specification was demanded of the monks but the similarity of their needs resulted in uniformity of design of abbeys across Europe. Eventually, the buildings of a Benedictine abbey were built in a uniform lay out, modified where necessary, to accommodate local circumstances. Abbey of St Gall The plan of the Abbey of Saint Gall (719 AD) in what is now Switzerland indicates the general arrangement of a Benedictine monastery of its day. According to the architect Robert Willis (architect) (1800–1875) the Abbey's lay out is that of a town of individual houses with streets running between them. The abbey was planned in compliance with the Benedictine rule that, if possible, a monastery should be self-contained. For instance, there was a mill, a bakehouse, stables, and cattle stalls. In all, there were thirty-three separate structures; mostly one level wooden buildings. The Abbey church occupied the centre of a quadrangular area, about square. On the eastern side of the north transept of the church was the "scriptorium" or writing-room, with a library above. The church and nearby buildings ranged about the cloister, a court about which there was a covered arcade which allowed sheltered movement between the buildings. The nave of the church was on the north boundary of the cloister. On the east side of the cloister, on the ground floor, was the "pisalis" or "calefactory". This was a common room, warmed by flues beneath the floor. Above the common room was the dormitory. The dormitory opened onto the cloister and also onto the south transept of the church. This enabled the monks to attend nocturnal services. A passage at the other end of the dormitory lead to the "necessarium" (latrines). On the south side of the cloister was the refectory. The kitchen, at the west end of the refectory was accessed via an anteroom and a long passage. Nearby were the bake house, brew house and the sleeping-rooms of the servants. The upper story of the refectory was called the "vestiarium" (a room where the ordinary clothes of the monks were stored). On the western side of the cloister was another two-story building with a cellar on the ground floor and the larder and store-room on the upper floor. Between this building and the church was a parlour for receiving visitors. One door of the parlour led to the cloisters and the other led to the outer part of the Abbey. Against the outer wall of the church was a school and headmaster's house. The school consisted of a large schoolroom divided in the middle by a screen or partition, and surrounded by fourteen little rooms, the "dwellings of the scholars". The abbot's home was near the school. To the north of the church and to the right of the main entrance to the Abbey, was a residence for distinguished guests. To the left of the main entrance was a building to house poor travellers and pilgrims. There was also a building to receive visiting monks. These "hospitia" had a large common room or refectory surrounded by bed rooms. Each hospitium had its own brewhouse and bakehouse, and the building for more prestigious travellers had a kitchen and storeroom, with bedrooms for the guests' servants and stables for their horses. The monks of the Abbey lived in a house built against the north wall of the church. The whole of the southern and western areas of the Abbey were devoted to workshops, stables and farm-buildings including stables, ox-sheds, goatstables, piggeries, and sheep-folds, as well as the servants' and labourers' quarters. In the eastern part of the Abbey there was a group of buildings representing in layout, two complete miniature monasteries. That is, each had a covered cloister surrounded by the usual buildings such as the church, the refectory, the dormitory and so on. A detached building belonging to each contained a bathroom and a kitchen. One of the miniature complexes was called the "oblati". These were the buildings for the novices. The other complex was a hospital or infirmary for the care of sick monks. This infirmary complex included a physician's residence, a physic garden, a drug store, and a chamber for the critically ill. There was also a room for bloodletting and purging. The physic garden occupied the north east corner of the Abbey. In the southernmost area of the abbey was the workshop containing utilities for shoemakers, saddlers (or shoemakers, sellarii), cutlers and grinders, trencher-makers, tanners, curriers, fullers, smiths and goldsmiths. The tradesmen's living quarters were at the rear of the workshop. Here, there were also farm buildings, a large granary and threshing-floor, mills, and malthouse. At the south-east corner of the Abbey were hen and duck houses, a poultry-yard, and the dwelling of the keeper. Nearby was the kitchen garden which complemented the physic garden and a cemetery orchard. Every large monastery had priories. A priory was a smaller structure or entities which depended on the monastery. Some were small monasteries accommodating five or ten monks. Others were no more than a single building serving as residence or a farm offices. The outlying farming establishments belonging to the monastic foundations were known as "villae" or "granges". They were usually staffed by lay-brothers, sometimes under the supervision of a monk. Benedictine abbeys in England Many of today's cathedrals in England were originally Benedictine monasteries. These included Canterbury, Chester, Durham, Ely, Gloucester, Norwich, Peterborough, Rochester, Winchester, and Worcester. Shrewsbury Abbey in Shropshire was founded as a Benedictine monastery by the Normans in 1083. Westminster Abbey Westminster Abbey was founded in the tenth century by Saint Dunstan who established a community of Benedictine monks. The only traces of St Dunstan's monastery remaining are round arches and massive supporting columns of the undercroft and the Pyx Chamber. The cloister and buildings lie directly to the south of the church. Parallel to the nave, on the south side of the cloister, was a refectory, with a lavatory at the door. On the eastern side, there was a dormitory, raised on a vaulted substructure and communicating with the south transept and a chapter house (meeting room). A small cloister lay to the south-east of the large cloister. Beyond that was an infirmary with a table hall and a refectory for those who were able to leave their chambers. At the west entrance to the Abbey, there was a house and a small courtyard for the abbot. St Mary's Abbey, York In 1055, St Mary's Abbey, York was built in England's north by the Order of Saint Benedict. It followed the common plan. The entrance to the abbey was through a strong gate on the northern side. Close to the entrance was a chapel. This was for visitors arriving at the Abbey to make their devotions. Near the gate was the hospitium (guest hall). The buildings are completely ruined, but the walls of the nave and the cloisters are still visible on the grounds of the Yorkshire Museum. The Abbey was surrounded by fortified walls on three sides. The River Ouse bordered the fourth side. The stone walls remain as an excellent example of English abbey walls. Reforms at the Abbey of Cluny The Abbey of Cluny was founded by William I, Duke of Aquitaine in 910 AD at Cluny, Saône-et-Loire, France. The Abbey was built in the Romanesque style. The Abbey was noted for its strict observance of the Rule of Saint Benedict. However, reforms resulted in many departures from this precedent. The Cluniac Reforms brought focus to the traditions of monastic life, encouraging art and the caring of the poor. The reforms quickly spread by the founding of new abbey complexes and by adoption of the reforms by existing abbeys. By the twelfth century, the Abbey of Cluny was the head of an order consisting of 314 monasteries. The church at the Abbey was commenced in 1089 AD by Hugh of Cluny, the sixth abbot. It was finished and consecrated by Pope Innocent II around 1132 AD. The church was regarded as one of the wonders of the Middle Ages. At in length, it was the largest church in Christendom until the completion of St Peter's Basilica at Rome. The church consisted of five naves, a narthex (ante-church) which was added in 1220 AD, and several towers. Together with the conventual buildings, it covered an area of twenty-five acres. In the Dechristianization of France during the French Revolution in 1790 AD, the Abbey church was bought by the town and almost entirely destroyed. English Cluniac houses The first English house of the Cluniac order was built at Lewes, Sussex. It was founded by William de Warenne, 1st Earl of Surrey in about 1077 AD. All but one of the Cluniac houses in Britain were known as priories, symbolizing their subordination to the Abbot of Cluny. All the Cluniac houses in England and Scotland were French colonies, governed by French priors who travelled to the Abbey of Cluny to consult or be consulted (unless the abbot of Cluny chose to come to Britain, which happened rarely). The priory at Paisley was an exception. In 1245 AD it was raised to the status of an abbey, answerable only to the Pope. Abbeys of the Augustinian Canons The Augustinian (or "Austin") canons were an order of regular clergy within the hierarchy of the Catholic church. They held a position between monks and secular canons. They were known as "Black canons" because of the colour of their habits. In 1105 AD, the first house of the order was established at St Botolph's Priory, Colchester, Essex. The canons built very long naves to accommodate large congregations. The choirs were also long. Sometimes, as at Llanthony Priory and Christchurch, Dorset (Twynham), the choir was closed from the aisles. At other abbeys of the order, such as Bolton Abbey or Kirkham Priory, there were no aisles. The nave in the northern houses of the order often had only a north aisle (this is the case at Bolton, Brinkburn Priory and Lanercost Priory). The arrangement of the monastic buildings followed the ordinary plan. The prior's lodge was usually attached to the southwest angle of the nave. The Austin canons' house at Thornton, Lincolnshire had a large and magnificent gatehouse. The upper floors of the gatehouse formed the guest-house. The chapter-house was octagonal in shape. Augustinian abbeys Premonstratensians (Norbertians) The Premonstratensian regular canons, or "White canons", were of an order founded in 1119 AD by Norbert of Xanten. The order was a reformed branch of the Augustinian canons. From a marshy area in the Forest of Coucy in the diocese of Laon, the order spread widely. Even in Norbert's lifetime, the order had built abbeys in Aleppo, Syria, and in the Kingdom of Jerusalem. Of the Abbey of Saint Samuel, Denys Pringle wrote, "The Premonstatensian abbey of Saint Samuel was a daughter house of Prémontré itself. Its abbot had the status of a suffragan of the patriarch of Jerusalem, with the right to a cross, but not to a mitre nor a ring." It long maintained its rigid austerity, though in later years the abbey grew wealthier, and its members indulged in more frequent luxuries. Just after 1140 AD, the Premonstratensians were brought to England. Their first settlement was at Newhouse Abbey, Lincolnshire, near the Humber tidal estuary. There were as many as thirty-five Premonstratensian abbeys in England. The head abbey in England was at Welbeck Abbey but the best preserved are Easby Abbey in Yorkshire, and Bayham Old Abbey in Kent. The layout of Easby Abbey is irregular due to its position on the edge of a steep river bank. The cloister is duly placed on the south side of the church, and the chief buildings occupy their usual positions around it. However, the cloister garth (quadrangle), as at Chichester, is not rectangular, and thus, all the surrounding buildings are positioned in an awkward fashion. The church follows the plan adopted by the Austin canons in their northern abbeys, and has only one aisle to the north of the nave, while the choir is long, narrow and without an aisle. Each transept has an aisle to the east, forming three chapels. The church at Bayham Old Abbey had no aisles in the nave or the choir. The latter terminated in a three-sided apse. The church is remarkable for its extreme narrowness in proportion to its length. While the building is long, it is not more than wide. Premonstratensian canons did not care to have congregations nor possessions. Therefore, they built their churches in the shape of a long room. Cistercian abbeys The Cistercians, a Benedictine reform group, were established at Cîteaux in 1098 AD by Robert of Molesme, Abbot of Molesme, for the purpose of restoring, as far as possible, the literal observance of the Rule of Saint Benedict. La Ferté, Pontigny, Clairvaux, and Morimond were the first four abbeys to follow Cîteaux's example and others followed. The monks of Cîteaux created the well known vineyards of Clos-Vougeot and Romanée in Burgundy. The Cistercian principle of rigid self-abnegation carried over to the design of the order's churches and buildings. The defining architectural characteristic of the Cistercian abbeys was extreme simplicity and plainness. Only a single, central tower was permitted, and that was usually very low. Unnecessary pinnacles and turrets were prohibited. The triforium was omitted. The windows were usually plain and undivided, and it was forbidden to decorate them with stained glass. All needless ornament was proscribed. The crosses were made of wood and the candlesticks of iron. The same principle governed the choice of site for Cistercian abbeys in that a most dismal site might be improved by the building of an abbey. The Cistercian monasteries were founded in deep, well-watered valleys, always standing at a stream's edge. The building might extend over the water as is the case at Fountains Abbey. These valleys, now rich and productive, had a very different appearance when the brethren first chose them as their place of retreat. Wide swamps, deep morasses, tangled thickets, and wild, impassable forests were their prevailing features. Clara Vallis of St Bernard, now the "bright valley" was originally, the "Valley of Wormwood". It was an infamous den of robbers. See also: Fossanuova Abbey. Clairvaux Abbey. Cîteaux Abbey. Kirkstall Abbey. Loc-Dieu. Rievaulx Abbey. Strata Florida. Copts The plan of a Coptic Orthodox monastery, from Lenoir, shows a church of three aisles, with cellular apses, and two ranges of cells on either side of an oblong gallery. See also Gothic cathedrals and churches List of abbeys and priories Priory References Sources Attribution External links Monastery and abbey index on sacred-destinations.com Abbeys of Provence, France Abbey Pages on historyfish.net - info on abbeys and monastic life, images from Photochrom collection

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

Annales school

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

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

Antimatter

In modern physics, antimatter is defined as matter composed of the antiparticles (or "partners") of the corresponding particles in "ordinary" matter, and can be thought of as matter with reversed charge, parity, and time (CPT reversal). Antimatter occurs in natural processes like cosmic ray collisions and some types of radioactive decay, but only a tiny fraction of these have successfully been bound together in experiments to form antiatoms. Minuscule numbers of antiparticles can be generated at particle accelerators; however, total artificial production has been only a few nanograms. No macroscopic amount of antimatter has ever been assembled due to the extreme cost and difficulty of production and handling. In theory, a particle and its antiparticle (for example, a proton and an antiproton) have the same mass, but opposite electric charge, and other differences in quantum numbers. A collision between any particle and its anti-particle partner leads to their mutual annihilation, giving rise to various proportions of intense photons (gamma rays), neutrinos, and sometimes less-massive particleantiparticle pairs. The majority of the total energy of annihilation emerges in the form of ionizing radiation. If surrounding matter is present, the energy content of this radiation will be absorbed and converted into other forms of energy, such as heat or light. The amount of energy released is usually proportional to the total mass of the collided matter and antimatter, in accordance with the notable mass–energy equivalence equation, . Antiparticles bind with each other to form antimatter, just as ordinary particles bind to form normal matter. For example, a positron (the antiparticle of the electron) and an antiproton (the antiparticle of the proton) can form an antihydrogen atom. The nuclei of antihelium have been artificially produced, albeit with difficulty, and are the most complex anti-nuclei so far observed. Physical principles indicate that complex antimatter atomic nuclei are possible, as well as anti-atoms corresponding to the known chemical elements. There is strong evidence that the observable universe is composed almost entirely of ordinary matter, as opposed to an equal mixture of matter and antimatter. This asymmetry of matter and antimatter in the visible universe is one of the great unsolved problems in physics. The process by which this inequality between matter and antimatter particles developed is called baryogenesis. Definitions Antimatter particles carry the same charge as matter particles, but of opposite sign. That is, an antiproton is negatively charged and an antielectron (positron) is positively charged. Neutrons do not carry a net charge, but their constituent quarks do. Protons and neutrons have a baryon number of +1, while antiprotons and antineutrons have a baryon number of –1. Similarly, electrons have a lepton number of +1, while that of positrons is –1. When a particle and its corresponding antiparticle collide, they are both converted into energy. The French term contra-terrene led to the initialism "C.T." and the science fiction term "seetee", as used in such novels as Seetee Ship. Conceptual history The idea of negative matter appears in past theories of matter that have now been abandoned. Using the once popular vortex theory of gravity, the possibility of matter with negative gravity was discussed by William Hicks in the 1880s. Between the 1880s and the 1890s, Karl Pearson proposed the existence of "squirts" and sinks of the flow of aether. The squirts represented normal matter and the sinks represented negative matter. Pearson's theory required a fourth dimension for the aether to flow from and into. The term antimatter was first used by Arthur Schuster in two rather whimsical letters to Nature in 1898, in which he coined the term. He hypothesized antiatoms, as well as whole antimatter solar systems, and discussed the possibility of matter and antimatter annihilating each other. Schuster's ideas were not a serious theoretical proposal, merely speculation, and like the previous ideas, differed from the modern concept of antimatter in that it possessed negative gravity. The modern theory of antimatter began in 1928, with a paper by Paul Dirac. Dirac realised that his relativistic version of the Schrödinger wave equation for electrons predicted the possibility of antielectrons. These were discovered by Carl D. Anderson in 1932 and named positrons from "positive electron". Although Dirac did not himself use the term antimatter, its use follows on naturally enough from antielectrons, antiprotons, etc. A complete periodic table of antimatter was envisaged by Charles Janet in 1929. The Feynman–Stueckelberg interpretation states that antimatter and antiparticles are regular particles traveling backward in time. Notation One way to denote an antiparticle is by adding a bar over the particle's symbol. For example, the proton and antiproton are denoted as and , respectively. The same rule applies if one were to address a particle by its constituent components. A proton is made up of quarks, so an antiproton must therefore be formed from antiquarks. Another convention is to distinguish particles by positive and negative electric charge. Thus, the electron and positron are denoted simply as and respectively. To prevent confusion, however, the two conventions are never mixed. Properties Theorized anti-gravitational properties of antimatter are currently being tested at the AEGIS and ALPHA-g experiments at CERN. Research is needed to study the possible gravitational effects between matter and antimatter, and between antimatter and antimatter. However research is difficult considering when the two meet they annihilate, along with the current difficulties of capturing and containing antimatter. There are compelling theoretical reasons to believe that, aside from the fact that antiparticles have different signs on all charges (such as electric and baryon charges), matter and antimatter have exactly the same properties. This means a particle and its corresponding antiparticle must have identical masses and decay lifetimes (if unstable). It also implies that, for example, a star made up of antimatter (an "antistar") will shine just like an ordinary star. This idea was tested experimentally in 2016 by the ALPHA experiment, which measured the transition between the two lowest energy states of antihydrogen. The results, which are identical to that of hydrogen, confirmed the validity of quantum mechanics for antimatter. Origin and asymmetry Most matter observable from the Earth seems to be made of matter rather than antimatter. If antimatter-dominated regions of space existed, the gamma rays produced in annihilation reactions along the boundary between matter and antimatter regions would be detectable. Antiparticles are created everywhere in the universe where high-energy particle collisions take place. High-energy cosmic rays striking Earth's atmosphere (or any other matter in the Solar System) produce minute quantities of antiparticles in the resulting particle jets, which are immediately annihilated by contact with nearby matter. They may similarly be produced in regions like the center of the Milky Way and other galaxies, where very energetic celestial events occur (principally the interaction of relativistic jets with the interstellar medium). The presence of the resulting antimatter is detectable by the two gamma rays produced every time positrons annihilate with nearby matter. The frequency and wavelength of the gamma rays indicate that each carries 511 keV of energy (that is, the rest mass of an electron multiplied by c2). Observations by the European Space Agency's INTEGRAL satellite may explain the origin of a giant antimatter cloud surrounding the galactic center. The observations show that the cloud is asymmetrical and matches the pattern of X-ray binaries (binary star systems containing black holes or neutron stars), mostly on one side of the galactic center. While the mechanism is not fully understood, it is likely to involve the production of electron–positron pairs, as ordinary matter gains kinetic energy while falling into a stellar remnant. Antimatter may exist in relatively large amounts in far-away galaxies due to cosmic inflation in the primordial time of the universe. Antimatter galaxies, if they exist, are expected to have the same chemistry and absorption and emission spectra as normal-matter galaxies, and their astronomical objects would be observationally identical, making them difficult to distinguish. NASA is trying to determine if such galaxies exist by looking for X-ray and gamma ray signatures of annihilation events in colliding superclusters. In October 2017, scientists working on the BASE experiment at CERN reported a measurement of the antiproton magnetic moment to a precision of 1.5 parts per billion. It is consistent with the most precise measurement of the proton magnetic moment (also made by BASE in 2014), which supports the hypothesis of CPT symmetry. This measurement represents the first time that a property of antimatter is known more precisely than the equivalent property in matter. Antimatter quantum interferometry has been first demonstrated in 2018 in the Positron Laboratory (L-NESS) of Rafael Ferragut in Como (Italy), by a group led by Marco Giammarchi. Natural production Positrons are produced naturally in β+ decays of naturally occurring radioactive isotopes (for example, potassium-40) and in interactions of gamma quanta (emitted by radioactive nuclei) with matter. Antineutrinos are another kind of antiparticle created by natural radioactivity (β− decay). Many different kinds of antiparticles are also produced by (and contained in) cosmic rays. In January 2011, research by the American Astronomical Society discovered antimatter (positrons) originating above thunderstorm clouds; positrons are produced in terrestrial gamma ray flashes created by electrons accelerated by strong electric fields in the clouds. Antiprotons have also been found to exist in the Van Allen Belts around the Earth by the PAMELA module. Antiparticles are also produced in any environment with a sufficiently high temperature (mean particle energy greater than the pair production threshold). It is hypothesized that during the period of baryogenesis, when the universe was extremely hot and dense, matter and antimatter were continually produced and annihilated. The presence of remaining matter, and absence of detectable remaining antimatter, is called baryon asymmetry. The exact mechanism that produced this asymmetry during baryogenesis remains an unsolved problem. One of the necessary conditions for this asymmetry is the violation of CP symmetry, which has been experimentally observed in the weak interaction. Recent observations indicate black holes and neutron stars produce vast amounts of positron-electron plasma via the jets. Observation in cosmic rays Satellite experiments have found evidence of positrons and a few antiprotons in primary cosmic rays, amounting to less than 1% of the particles in primary cosmic rays. This antimatter cannot all have been created in the Big Bang, but is instead attributed to have been produced by cyclic processes at high energies. For instance, electron-positron pairs may be formed in pulsars, as a magnetized neutron star rotation cycle shears electron-positron pairs from the star surface. Therein the antimatter forms a wind that crashes upon the ejecta of the progenitor supernovae. This weathering takes place as "the cold, magnetized relativistic wind launched by the star hits the non-relativistically expanding ejecta, a shock wave system forms in the impact: the outer one propagates in the ejecta, while a reverse shock propagates back towards the star." The former ejection of matter in the outer shock wave and the latter production of antimatter in the reverse shock wave are steps in a space weather cycle. Preliminary results from the presently operating Alpha Magnetic Spectrometer (AMS-02) on board the International Space Station show that positrons in the cosmic rays arrive with no directionality, and with energies that range from 10 GeV to 250 GeV. In September, 2014, new results with almost twice as much data were presented in a talk at CERN and published in Physical Review Letters. A new measurement of positron fraction up to 500 GeV was reported, showing that positron fraction peaks at a maximum of about 16% of total electron+positron events, around an energy of 275 ± 32 GeV. At higher energies, up to 500 GeV, the ratio of positrons to electrons begins to fall again. The absolute flux of positrons also begins to fall before 500 GeV, but peaks at energies far higher than electron energies, which peak about 10 GeV. These results on interpretation have been suggested to be due to positron production in annihilation events of massive dark matter particles. Cosmic ray antiprotons also have a much higher energy than their normal-matter counterparts (protons). They arrive at Earth with a characteristic energy maximum of 2 GeV, indicating their production in a fundamentally different process from cosmic ray protons, which on average have only one-sixth of the energy. There is an ongoing search for larger antimatter nuclei, such as antihelium nuclei (that is, anti-alpha particles), in cosmic rays. The detection of natural antihelium could imply the existence of large antimatter structures such as an antistar. A prototype of the AMS-02 designated AMS-01, was flown into space aboard the on STS-91 in June 1998. By not detecting any antihelium at all, the AMS-01 established an upper limit of 1.1×10−6 for the antihelium to helium flux ratio. AMS-02 revealed in December 2016 that it had discovered a few signals consistent with antihelium nuclei amidst several billion helium nuclei. The result remains to be verified, and the team is currently trying to rule out contamination. Artificial production Positrons Positrons were reported in November 2008 to have been generated by Lawrence Livermore National Laboratory in larger numbers than by any previous synthetic process. A laser drove electrons through a gold target's nuclei, which caused the incoming electrons to emit energy quanta that decayed into both matter and antimatter. Positrons were detected at a higher rate and in greater density than ever previously detected in a laboratory. Previous experiments made smaller quantities of positrons using lasers and paper-thin targets; newer simulations showed that short bursts of ultra-intense lasers and millimeter-thick gold are a far more effective source. Antiprotons, antineutrons, and antinuclei The existence of the antiproton was experimentally confirmed in 1955 by University of California, Berkeley physicists Emilio Segrè and Owen Chamberlain, for which they were awarded the 1959 Nobel Prize in Physics. An antiproton consists of two up antiquarks and one down antiquark (). The properties of the antiproton that have been measured all match the corresponding properties of the proton, with the exception of the antiproton having opposite electric charge and magnetic moment from the proton. Shortly afterwards, in 1956, the antineutron was discovered in proton–proton collisions at the Bevatron (Lawrence Berkeley National Laboratory) by Bruce Cork and colleagues. In addition to antibaryons, anti-nuclei consisting of multiple bound antiprotons and antineutrons have been created. These are typically produced at energies far too high to form antimatter atoms (with bound positrons in place of electrons). In 1965, a group of researchers led by Antonino Zichichi reported production of nuclei of antideuterium at the Proton Synchrotron at CERN. At roughly the same time, observations of antideuterium nuclei were reported by a group of American physicists at the Alternating Gradient Synchrotron at Brookhaven National Laboratory. Antihydrogen atoms In 1995, CERN announced that it had successfully brought into existence nine hot antihydrogen atoms by implementing the SLAC/Fermilab concept during the PS210 experiment. The experiment was performed using the Low Energy Antiproton Ring (LEAR), and was led by Walter Oelert and Mario Macri. Fermilab soon confirmed the CERN findings by producing approximately 100 antihydrogen atoms at their facilities. The antihydrogen atoms created during PS210 and subsequent experiments (at both CERN and Fermilab) were extremely energetic and were not well suited to study. To resolve this hurdle, and to gain a better understanding of antihydrogen, two collaborations were formed in the late 1990s, namely, ATHENA and ATRAP. In 1999, CERN activated the Antiproton Decelerator, a device capable of decelerating antiprotons from to  – still too "hot" to produce study-effective antihydrogen, but a huge leap forward. In late 2002 the ATHENA project announced that they had created the world's first "cold" antihydrogen. The ATRAP project released similar results very shortly thereafter. The antiprotons used in these experiments were cooled by decelerating them with the Antiproton Decelerator, passing them through a thin sheet of foil, and finally capturing them in a Penning–Malmberg trap. The overall cooling process is workable, but highly inefficient; approximately 25 million antiprotons leave the Antiproton Decelerator and roughly 25,000 make it to the Penning–Malmberg trap, which is about or 0.1% of the original amount. The antiprotons are still hot when initially trapped. To cool them further, they are mixed into an electron plasma. The electrons in this plasma cool via cyclotron radiation, and then sympathetically cool the antiprotons via Coulomb collisions. Eventually, the electrons are removed by the application of short-duration electric fields, leaving the antiprotons with energies less than . While the antiprotons are being cooled in the first trap, a small cloud of positrons is captured from radioactive sodium in a Surko-style positron accumulator. This cloud is then recaptured in a second trap near the antiprotons. Manipulations of the trap electrodes then tip the antiprotons into the positron plasma, where some combine with antiprotons to form antihydrogen. This neutral antihydrogen is unaffected by the electric and magnetic fields used to trap the charged positrons and antiprotons, and within a few microseconds the antihydrogen hits the trap walls, where it annihilates. Some hundreds of millions of antihydrogen atoms have been made in this fashion. In 2005, ATHENA disbanded and some of the former members (along with others) formed the ALPHA Collaboration, which is also based at CERN. The ultimate goal of this endeavour is to test CPT symmetry through comparison of the atomic spectra of hydrogen and antihydrogen (see hydrogen spectral series). Most of the sought-after high-precision tests of the properties of antihydrogen could only be performed if the antihydrogen were trapped, that is, held in place for a relatively long time. While antihydrogen atoms are electrically neutral, the spins of their component particles produce a magnetic moment. These magnetic moments can interact with an inhomogeneous magnetic field; some of the antihydrogen atoms can be attracted to a magnetic minimum. Such a minimum can be created by a combination of mirror and multipole fields. Antihydrogen can be trapped in such a magnetic minimum (minimum-B) trap; in November 2010, the ALPHA collaboration announced that they had so trapped 38 antihydrogen atoms for about a sixth of a second. This was the first time that neutral antimatter had been trapped. On 26 April 2011, ALPHA announced that they had trapped 309 antihydrogen atoms, some for as long as 1,000 seconds (about 17 minutes). This was longer than neutral antimatter had ever been trapped before. ALPHA has used these trapped atoms to initiate research into the spectral properties of the antihydrogen. In 2016, a new antiproton decelerator and cooler called ELENA (Extra Low ENergy Antiproton decelerator) was built. It takes the antiprotons from the antiproton decelerator and cools them to 90 keV, which is "cold" enough to study. This machine works by using high energy and accelerating the particles within the chamber. More than one hundred antiprotons can be captured per second, a huge improvement, but it would still take several thousand years to make a nanogram of antimatter. The biggest limiting factor in the large-scale production of antimatter is the availability of antiprotons. Recent data released by CERN states that, when fully operational, their facilities are capable of producing ten million antiprotons per minute. Assuming a 100% conversion of antiprotons to antihydrogen, it would take 100 billion years to produce 1 gram or 1 mole of antihydrogen (approximately atoms of anti-hydrogen). However, CERN only produces 1% of the anti-matter Fermilab does, and neither are designed to produce anti-matter. According to Gerald Jackson, using technology already in use today we are capable of producing and capturing 20 grams of anti-matter particles per year at a yearly cost of 670 million dollars per facility. Antihelium Antihelium-3 nuclei () were first observed in the 1970s in proton–nucleus collision experiments at the Institute for High Energy Physics by Y. Prockoshkin's group (Protvino near Moscow, USSR) and later created in nucleus–nucleus collision experiments. Nucleus–nucleus collisions produce antinuclei through the coalescence of antiprotons and antineutrons created in these reactions. In 2011, the STAR detector reported the observation of artificially created antihelium-4 nuclei (anti-alpha particles) () from such collisions. The Alpha Magnetic Spectrometer on the International Space Station has, as of 2021, recorded eight events that seem to indicate the detection of antihelium-3. Preservation Antimatter cannot be stored in a container made of ordinary matter because antimatter reacts with any matter it touches, annihilating itself and an equal amount of the container. Antimatter in the form of charged particles can be contained by a combination of electric and magnetic fields, in a device called a Penning trap. This device cannot, however, contain antimatter that consists of uncharged particles, for which atomic traps are used. In particular, such a trap may use the dipole moment (electric or magnetic) of the trapped particles. At high vacuum, the matter or antimatter particles can be trapped and cooled with slightly off-resonant laser radiation using a magneto-optical trap or magnetic trap. Small particles can also be suspended with optical tweezers, using a highly focused laser beam. In 2011, CERN scientists were able to preserve antihydrogen for approximately 17 minutes. The record for storing antiparticles is currently held by the TRAP experiment at CERN: antiprotons were kept in a Penning trap for 405 days. A proposal was made in 2018 to develop containment technology advanced enough to contain a billion anti-protons in a portable device to be driven to another lab for further experimentation. Cost Scientists claim that antimatter is the costliest material to make. In 2006, Gerald Smith estimated $250 million could produce 10 milligrams of positrons (equivalent to $25 billion per gram); in 1999, NASA gave a figure of $62.5 trillion per gram of antihydrogen. This is because production is difficult (only very few antiprotons are produced in reactions in particle accelerators) and because there is higher demand for other uses of particle accelerators. According to CERN, it has cost a few hundred million Swiss francs to produce about 1 billionth of a gram (the amount used so far for particle/antiparticle collisions). In comparison, to produce the first atomic weapon, the cost of the Manhattan Project was estimated at $23 billion with inflation during 2007. Several studies funded by the NASA Institute for Advanced Concepts are exploring whether it might be possible to use magnetic scoops to collect the antimatter that occurs naturally in the Van Allen belt of the Earth, and ultimately, the belts of gas giants, like Jupiter, hopefully at a lower cost per gram. Uses Medical Matter–antimatter reactions have practical applications in medical imaging, such as positron emission tomography (PET). In positive beta decay, a nuclide loses surplus positive charge by emitting a positron (in the same event, a proton becomes a neutron, and a neutrino is also emitted). Nuclides with surplus positive charge are easily made in a cyclotron and are widely generated for medical use. Antiprotons have also been shown within laboratory experiments to have the potential to treat certain cancers, in a similar method currently used for ion (proton) therapy. Fuel Isolated and stored antimatter could be used as a fuel for interplanetary or interstellar travel as part of an antimatter-catalyzed nuclear pulse propulsion or another antimatter rocket. Since the energy density of antimatter is higher than that of conventional fuels, an antimatter-fueled spacecraft would have a higher thrust-to-weight ratio than a conventional spacecraft. If matter–antimatter collisions resulted only in photon emission, the entire rest mass of the particles would be converted to kinetic energy. The energy per unit mass () is about 10 orders of magnitude greater than chemical energies, and about 3 orders of magnitude greater than the nuclear potential energy that can be liberated, today, using nuclear fission (about per fission reaction or ), and about 2 orders of magnitude greater than the best possible results expected from fusion (about for the proton–proton chain). The reaction of of antimatter with of matter would produce (180 petajoules) of energy (by the mass–energy equivalence formula, ), or the rough equivalent of 43 megatons of TNT – slightly less than the yield of the 27,000 kg Tsar Bomba, the largest thermonuclear weapon ever detonated. Not all of that energy can be utilized by any realistic propulsion technology because of the nature of the annihilation products. While electron–positron reactions result in gamma ray photons, these are difficult to direct and use for thrust. In reactions between protons and antiprotons, their energy is converted largely into relativistic neutral and charged pions. The neutral pions decay almost immediately (with a lifetime of 85 attoseconds) into high-energy photons, but the charged pions decay more slowly (with a lifetime of 26 nanoseconds) and can be deflected magnetically to produce thrust. Charged pions ultimately decay into a combination of neutrinos (carrying about 22% of the energy of the charged pions) and unstable charged muons (carrying about 78% of the charged pion energy), with the muons then decaying into a combination of electrons, positrons and neutrinos (cf. muon decay; the neutrinos from this decay carry about 2/3 of the energy of the muons, meaning that from the original charged pions, the total fraction of their energy converted to neutrinos by one route or another would be about ). Weapons Antimatter has been considered as a trigger mechanism for nuclear weapons. A major obstacle is the difficulty of producing antimatter in large enough quantities, and there is no evidence that it will ever be feasible. Nonetheless, the U.S. Air Force funded studies of the physics of antimatter in the Cold War, and began considering its possible use in weapons, not just as a trigger, but as the explosive itself. See also References Further reading External links Freeview Video 'Antimatter' by the Vega Science Trust and the BBC/OU CERN Webcasts (RealPlayer required) What is Antimatter? (from the Frequently Asked Questions at the Center for Antimatter–Matter Studies) FAQ from CERN with information about antimatter aimed at the general reader, posted in response to antimatter's fictional portrayal in Angels & Demons Antimatter at Angels and Demons, CERN What is direct CP-violation? Animated illustration of antihydrogen production at CERN from the Exploratorium. Quantum field theory Fictional power sources Articles containing video clips

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https://en.wikipedia.org/wiki/Casa%20Batll%C3%B3

Casa Batlló

() is a building in the center of Barcelona. It was designed by Antoni Gaudí, and is considered one of his masterpieces. A remodel of a previously built house, it was redesigned in 1904 by Gaudí and has been refurbished several times after that. Gaudí's assistants Domènec Sugrañes i Gras, Josep Canaleta and Joan Rubió also contributed to the renovation project. The local name for the building is (House of Bones), as it has a visceral, skeletal organic quality. It is located on the in the Eixample district, and forms part of a row of houses known as the (or , the "Block of Discord"), which consists of four buildings by noted architects of Barcelona. Like everything Gaudí designed, is only identifiable as or Art Nouveau in the broadest sense. The ground floor, in particular, has unusual tracery, irregular oval windows and flowing sculpted stone work. There are few straight lines, and much of the façade is decorated with a colorful mosaic made of broken ceramic tiles (). The roof is arched and was likened to the back of a dragon or dinosaur. A common theory about the building is that the rounded feature to the left of centre, terminating at the top in a turret and cross, represents the lance of Saint George (patron saint of Catalonia, Gaudí's home), which has been plunged into the back of the dragon. In 2005, became an UNESCO World Heritage Site among the other Works of Antoni Gaudí, and is visited by people from around the world. History Initial construction (1877) The building that is now was built in 1877, commissioned by Lluís Sala Sánchez. It was a classical building without remarkable characteristics within the eclecticism traditional by the end of the 19th century. The building had a basement, a ground floor, four other floors and a garden in the back. Batlló family The house was bought by Josep Batlló in 1903. The design of the house made the home undesirable to buyers but the Batlló family decided to buy the place due to its centralized location. It is located in the middle of , which in the early 20th century was known as a very prestigious and fashionable area. It was an area where the prestigious family could draw attention to themselves. In 1906, Josep Batlló still owned the home. The Batlló family was very well known in Barcelona for its contribution to the textile industry in the city. Mr. Josep Batlló i Casanovas was a textile industrialist who owned a few factories in the city. Mr. Batlló married Amàlia Godó Belaunzarán, from the family that founded the newspaper La Vanguardia. Josep wanted an architect that would design a house that was like no other and stood out as being audacious and creative. Both Josep and his wife were open to anything and they decided not to limit Gaudí. Josep did not want his house to resemble any of the houses of the rest of the Batlló family, such as Casa Pía, built by the Josep Vilaseca. He chose the architect who had designed Park Güell because he wanted him to come up with a risky plan. The family lived on the principal floor of until the middle of the 1950s. Renovation (1904-1906) In 1904, Josep Batlló hired Gaudí to design his home; at first his plans were to tear down the building and construct a completely new house. Gaudí convinced Josep that a renovation was sufficient and was also able to submit the planning application the same year. The building was completed and refurbished in 1906. He completely changed the main apartment which became the residence for the Batlló family. He expanded the central well in order to supply light to the whole building and also added new floors. In the same year the Barcelona City Council selected the house as a candidate for that year's best building award. The award was given to another architect that year despite Gaudí's design. Refurbishments Josep Batlló died in 1934 and the house was kept in order by the wife until her death in 1940. After the death of the two parents, the house was kept and managed by the children until 1954. In 1954, an insurance company named Seguros Iberia acquired Casa Batlló and set up offices there. In 1970, the first refurbishment occurred mainly in several of the interior rooms of the house. In 1983, the exterior balconies were restored to their original colour and a year later the exterior façade was illuminated in the ceremony of La Mercè. Multiple uses In 1993, the current owners of Casa Batlló bought the home and continued refurbishments throughout the whole building. Two years later, in 1995, Casa Batlló began to hire out its facilities for different events. More than 2,500 square meters of rooms within the building were rented out for many different functions. Due to the building's location and the beauty of the facilities being rented, the rooms of Casa Batlló were in very high demand and hosted many important events for the city. Design Overview The local name for the building is Casa dels ossos (House of Bones), as it has a visceral, skeletal organic quality. The building looks very remarkable — like everything Gaudí designed, only identifiable as Modernisme or Art Nouveau in the broadest sense. The ground floor, in particular, is rather astonishing with tracery, irregular oval windows and flowing sculpted stone work. It seems that the goal of the designer was to avoid straight lines completely. Much of the façade is decorated with a mosaic made of broken ceramic tiles (trencadís) that starts in shades of golden orange moving into greenish blues. The roof is arched and was likened to the back of a dragon or dinosaur. A common theory about the building is that the rounded feature to the left of centre, terminating at the top in a turret and cross, represents the lance of Saint George (patron saint of Catalonia, Gaudí's home), which has been plunged into the back of the dragon. Loft The loft is considered to be one of the most unusual spaces. It was formerly a service area for the tenants of the different apartments in the building which contained laundry rooms and storage areas. It is known for its simplicity of shapes and its Mediterranean influence through the use of white on the walls. It contains a series of sixty catenary arches that creates a space which represents the ribcage of an animal. Some people believe that the “ribcage” design of the arches is a ribcage for the dragon's spine that is represented in the roof. Noble floor and museum The noble floor is larger than seven-hundred square meters. It is the main floor of the building. The noble floor is accessed through a private entrance hall that utilizes skylights resembling tortoise shells and vaulted walls in curving shapes. On the noble floor, there is a spacious landing with direct views to the blue tiling of the building well. On the Passeig de Gracia side is Mr. Batlló's study, a dining room, and a secluded spot for courting couples, decorated with a mushroom-shaped fireplace. The elaborate and animal-like décor continues throughout the whole noble floor. In 2002, the house opened its doors to the public, and people were allowed to visit the noble floor. The building was opened to the public as part of the celebration of the International Year of Gaudí. Casa Batlló met with very much unanticipated success, and visitors became eager to see the rest of the house. Two years later, in celebration of the one hundredth anniversary of the beginning of work on Casa Batlló, the fifth floor was restored and the house extended its visit to the loft and the well. In 2005, Casa Batlló became a UNESCO World Heritage Site. Roof The roof terrace is one of the most popular features of the entire house due to its famous dragon back design. Gaudí represents an animal's spine by using tiles of different colors on one side. The roof is decorated with four chimney stacks, that are designed to prevent backdraughts. Exterior façade The façade has three distinct sections which are harmoniously integrated. The lower ground floor with the main floor and two first-floor galleries are contained in a structure of Montjuïc sandstone with undulating lines. The central part, which reaches the last floor, is a multicolored section with protruding balconies. The top of the building is a crown, like a huge gable, which is at the same level as the roof and helps to conceal the room where there used to be water tanks. This room is currently empty. The top displays a trim with ceramic pieces that has attracted multiple interpretations. Roof tiles The roof's arched profile recalls the spine of a dragon with ceramic tiles for scales, and a small triangular window towards the right of the structure simulates the eye. Legend has it that it was once possible to see the Sagrada Família through this window, which was being built simultaneously. As of 2022, the partial view of the Sagrada Família is available from this vantage point, with its spires visible over newer buildings. The tiles were given a metallic sheen to simulate the varying scales of the monster, with the color grading from green on the right side, where the head begins, to deep blue and violet in the center, to red and pink on the left side of the building. Tower and bulb One of the highlights of the façade is a tower topped with a cross of four arms oriented to the cardinal directions. It is a bulbous, root-like structure that evokes plant life. There is a second bulb-shaped structure similarly reminiscent of a thalamus flower, which is represented by a cross with arms that are actually buds announcing the next flowering. The tower is decorated with monograms of Jesus (JHS), Maria (M with the ducal crown) and Joseph (JHP), made of ceramic pieces that stand out golden on the green background that covers the façade. These symbols show the deep religiosity of Gaudí, who was inspired by the contemporaneous construction of his basilica to choose the theme of the holy family. The bulb was broken when it was delivered, perhaps during transportation. Although the manufacturer committed to re-do the broken parts, Gaudí liked the aesthetic of the broken masonry and asked that the pieces be stuck to the main structure with lime mortar and held in with a brass ring. Central section The central part of the façade evokes the surface of a lake with water lilies, reminiscent of Monet's Nymphéas, with gentle ripples and reflections caused by the glass and ceramic mosaic. It is a great undulating surface covered with plaster fragments of colored glass discs combined with 330 rounds of polychrome pottery. The discs were designed by Gaudí and Jujol between tests during their stay in Majorca, while working on the restoration of the Cathedral of Palma. Balcony Finally, above the central part of the façade is a smaller balcony, also iron, with a different exterior aesthetic, closer to a local type of lily. Two iron arms were installed here to support a pulley to raise and lower furniture. Main floor The façade of the main floor, made entirely in sandstone, and is supported by two columns. The design is complemented by joinery windows set with multicolored stained glass. In front of the large windows, as if they were pillars that support the complex stone structure, there are six fine columns that seem to simulate the bones of a limb, with an apparent central articulation; in fact, this is a floral decoration. The rounded shapes of the gaps and the lip-like edges carved into the stone surrounding them create a semblance of a fully open mouth, for which the Casa Batlló has been nicknamed the "house of yawns". The structure repeats on the first floor and in the design of two windows at the ends forming galleries, but on the large central window there are two balconies as described above. Gallery See also List of Modernista buildings in Barcelona Confidant from the Batlló House References Bibliography External links Official websites Casa Batlló Store Official Virtual Tour Unofficial websites Casa Batlló on GreatBuildings.com Casa Batlló pictures at barcelona-tourist-guide.com Casa Batlló description Casa Batllo at Gaudidesigner.com Casa Batllo at Tot Passejant (Spanish) 1877 establishments in Spain Antoni Gaudí buildings Art Nouveau houses Azulejos in buildings in Catalonia Eixample Houses completed in 1877 Houses in Catalonia Modernisme architecture in Barcelona Passeig de Gràcia Tourist attractions in Barcelona Visionary environments World Heritage Sites in Catalonia

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https://en.wikipedia.org/wiki/Park%20G%C3%BCell

Park Güell

Park Güell ( ; ) is a privatized park system composed of gardens and architectural elements located on Carmel Hill, in Barcelona, Catalonia, Spain. Carmel Hill belongs to the mountain range of Collserola – the Parc del Carmel is located on the northern face. Park Güell is located in La Salut, a neighborhood in the Gràcia district of Barcelona. With urbanization in mind, Eusebi Güell assigned the design of the park to Antoni Gaudí, a renowned architect and the face of Catalan modernism. The park was built from 1900 to 1914 and was officially opened as a public park in 1926. In 1984, UNESCO declared the park a World Heritage Site under "Works of Antoni Gaudí". Description Park Güell is the reflection of Gaudí's artistic plenitude, which belongs to his naturalist phase (first decade of the 20th century). During this period, the architect perfected his personal style through inspiration from organic shapes. He put into practice a series of new structural solutions rooted in the analysis of geometry. To that, the Catalan artist adds creative liberty and an imaginative, ornamental creation. Starting from a sort of baroquism, his works acquire a structural richness of forms and volumes, free of the rational rigidity or any sort of classic premises. In the design of Park Güell, Gaudí unleashed all his architectonic genius and put to practice much of his innovative structural solutions that would become the symbol of his organic style and that would culminate in the creation of the Basilica and Expiatory Church of the Holy Family (Catalan: Sagrada Família). Güell and Gaudí conceived this park, situated within a natural park. They imagined an organized grouping of high-quality homes, decked out with all the latest technological advancements to ensure maximum comfort, finished off with an artistic touch. They also envisioned a community strongly influenced by symbolism, since, in the common elements of the park, they were trying to synthesize many of the political and religious ideals shared by patron and architect: therefore there are noticeable concepts originating from political Catalanism – especially in the entrance stairway where the Catalan countries are represented – and from Catholicism – the Monumento al Calvario, originally designed to be a chapel. The mythological elements are so important: apparently Güell and Gaudí's conception of the park was also inspired by the Temple of Apollo of Delphi. On the other hand, many experts have tried to link the park to various symbols because of the complex iconography that Gaudí applied to the urban project. Such references go from political vindication to religious exaltation, passing through mythology, history and philosophy. Specifically, many studies claim to see references to Freemasonry, despite the deep religious beliefs of both Gaudí and Count Güell. These references have not been proven in the historiography of the modern architect. The multiplicity of symbols found in the Park Güell is, as previously mentioned, associated to political and religious signs, with a touch of mystery according to the preferences of that time for enigmas and puzzles. Origins as a housing development The park was originally part of a commercially unsuccessful housing site, the idea of Count Eusebi Güell, after whom the park was named. It was inspired by the English garden city movement; the original English name Park (in Catalan the name is "Parc Güell"; in Spanish, "Parque Güell"). The site was a rocky hill with little vegetation and few trees, called Muntanya Pelada (Bare Mountain). It already included a large country house called Larrard House or Muntaner de Dalt House and was next to a neighbourhood of upper-class houses called La Salut (The Health). The intention was to exploit the fresh air (well away from smoky factories) and beautiful views from the site, with sixty triangular lots being provided for luxury houses. Count Eusebi Güell added to the prestige of the development by moving in 1906 to live in Larrard House. Ultimately, only two houses were built, neither designed by Gaudí. One was intended to be a show house, but on being completed in 1904 was put up for sale, and as no buyers came forward, Gaudí, at Güell's suggestion, bought it with his savings and moved in with his family and his father in 1906. This house, where Gaudí lived from 1906 to 1926 (his death), was built by Francesc Berenguer in 1904. It contains original works by Gaudí and several of his collaborators. It is now the Gaudí House Museum (Casa Museu Gaudí) since 1963. In 1969, it was declared a historical artistic monument of national interest. Municipal garden It has since been converted into a municipal garden. It can be reached by underground railway (although the stations are at a distance from the Park and at a much lower level below the hill), by city buses, or by commercial tourist buses. Since October 2013 there is an entrance fee to visit the Monumental Zone (main entrance, terrace, viaducts, and the parts containing mosaics), so the entrance to the Park is no longer free. Limited tickets are available that often sell out in advance. Gaudí's house, "la Torre Rosa," – containing furniture that he designed – can be only visited for another entrance fee. There is a reduced rate for those wishing to see both Gaudí's house and the Sagrada Família Church. Park Güell is designed and composed to bring the peace and calm that one would expect from a park. The buildings flanking the entrance, though very original and remarkable with fantastically shaped roofs with unusual pinnacles, fit in well with the use of the park as pleasure gardens and seem relatively inconspicuous in the landscape when one considers the flamboyance of other buildings designed by Gaudí. These two buildings make up the Porter's Lodge pavilion. One of these buildings contains a small room with a telephone booth. The other, while once being the porter's house, is now a permanent exhibition of the Barcelona City History Museum MUHBA focused on the building itself, the park and the city. The focal point of the park is the main terrace, surrounded by a long bench in the form of a sea serpent. The curves of the serpent bench form a number of enclaves, creating a more social atmosphere. Gaudí incorporated many motifs of Catalan nationalism, and elements from religious mysticism and ancient poetry, into the Park. Much of the design of the benches was the work not of Gaudí but of his often overlooked collaborator Josep Maria Jujol. Roadways around the park to service the intended houses were designed by Gaudí as structures jutting out from the steep hillside or running on viaducts, with separate footpaths in arcades formed under these structures. This minimized the intrusion of the roads, and Gaudí designed them using local stone in a way that integrates them closely into the landscape. His structures echo natural forms, with columns like tree trunks supporting branching vaulting under the roadway, and the curves of vaulting and alignment of sloping columns designed in a similar way to his Church of Colònia Güell so that the inverted catenary arch shapes form perfect compression structures. At the park's high-point, there is a stone hill composed of steps leading up to a platform which holds three large crosses. The official name of this is "El Turó de les Tres Creus," however many tourists choose to call it Calvary. Two of the crosses point north–south and east–west, the third, and tallest cross, points skyward. This lookout offers the most complete view of Barcelona and the bay. It is possible to view the main city in panorama, with the Sagrada Família (another one of Antoni Guadí's famous creations), the Agbar Tower, and the Montjuïc area visible at a distance. The park supports a wide variety of wildlife, notably several of the non-native species of parrot found in the Barcelona area. Other birds can be seen from the park, with records including short-toed eagle. The park also supports a population of hummingbird hawk moths. Gallery of images See also List of Modernisme buildings in Barcelona Urban planning of Barcelona References External links Park Guell website Antoni Gaudí buildings Buildings and structures completed in 1914 Buildings and structures in Barcelona Culture in Barcelona Modernisme architecture in Barcelona Mosaics Gràcia Guell Visionary environments Azulejos in buildings in Catalonia Tourist attractions in Barcelona World Heritage Sites in Catalonia

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https://en.wikipedia.org/wiki/Casa%20Mil%C3%A0

Casa Milà

Casa Milà (, ), popularly known as La Pedrera (, ; "the stone quarry") in reference to its unconventional rough-hewn appearance, is a Modernista building in Barcelona, Catalonia, Spain. It was the last private residence designed by architect Antoni Gaudí and was built between 1906 and 1912. The building was commissioned in 1906 by and his wife . At the time, it was controversial because of its undulating stone facade, twisting wrought iron balconies and designed by Josep Maria Jujol. Several structural innovations include a self-supporting stone façade, and a free-plan floor, underground garage and the spectacular terrace on the roof. In 1984, it was declared a World Heritage Site by UNESCO. Since 2013 it has been the headquarters of the Fundació Catalunya La Pedrera, which manages visits to the building, exhibitions and other cultural and educational activities at Casa Milà. Building history Architect Antoni Gaudí i Cornet was born on June 25, 1852 in Catalonia, Spain. As a child, Gaudí's health was poor, suffering from rheumatism. Because of this, he was afforded lengthy periods of time resting at his summer house in Riudoms. Here he spent a large portion of his time outdoors, allowing him to deeply study nature. This would become one of the major influences in his architecture to come. Gaudí was a very practical man and a craftsman at his core. In his work he followed impulses and turned creative plans into reality. His openness to embrace new styles combined with a vivid imagination helped mold new styles of architecture and consequently helped push the limits of construction. Today he is regarded as a pioneer of the modern architecture style. In 1870, Gaudí moved to Barcelona to study architecture. He was an inconsistent student who showed flashes of brilliance. It took him eight years to graduate due to a mix of health complications, military service as well as other activities. After completion of his education he became a prolific architect as well as designing gardens, sculptures and all other decorative arts. Gaudí's most famous works consisted of several buildings: Parque Güell; Palacio Güell; Casa Mila; Casa Vicens. He also is contributed for his work on the Crypt of La Sagrada Familia and the Nativity facade. Gaudí's work at the time was both admired and criticized for his bold, innovative solutions. Gaudí was injured on June 7, 1926 when he was run over by a tram. He later died in the hospital due to his injuries on June 10, 1926 at the age of 73. A few years after his death, his fame became renowned by critics and the general public alike. Building owners Casa Milà was built for Roser Segimón and her husband Pere Milà. Roser Segimón was the wealthy widow of Josep Guardiola, an Indiano or Americano, or former colonist returned from South America, who had made his fortune with a coffee plantation in Guatemala. Her second husband, Pere Milà was a developer known for his flamboyant lifestyle. Construction process In 1905, Milà and Segimón married and on June 9, Roser Segimón bought a house with garden which occupied an area of 1,835 square meters, located on Paseo de Gracia, 92. In September, they commissioned Gaudí for building them a new house with the idea of living in the main floor and renting out the rest of the apartments. On February 2, 1906, the project was presented to the Barcelona City Council and the works began, demolishing the pre-existing building instead of reforming it, as in the case of the Casa Batlló. The building was completed in December 1910 and the owner asked Gaudí to make a certificate to inhabit the main floor, which the City Council authorized in October 1911, and the couple moved in. On October 31, 1912, Gaudí issued the certificate stating that, in accordance with his plans and his direction, the work had been completed and the whole house was ready to be rented. Critics and controversies The building did not respect any rules of conventional style, for which Gaudí received much criticism. To begin with, the name "La Pedrera" is in fact a nickname assigned by the citizens who disapproved of its unusualness. The unique structure of the building and the relationship between the building's architect and Pere Milà became the object of ridicule for the people of Barcelona and many humorous publications of the time. Catholic symbols Gaudí, a Catholic and a devotee of the Virgin Mary, planned for the Casa Milà to be a spiritual symbol. Overt religious elements include an excerpt from the Rosary on the cornice and planned statues of Mary, specifically Our Lady of the Rosary, and two archangels, St. Michael and St. Gabriel. However, the Casa Milà was not built entirely to Gaudí's specifications. The local government ordered the demolition of elements that exceeded the height standard for the city, and fined the Milàs for many infractions of building codes. After Semana Trágica, an outbreak of anticlericalism in the city, Milà prudently decided to forgo the religious statues. Gaudí contemplated abandoning the project but a priest persuaded him to continue. Change of ownership In 1940, Milà died. Segimon sold the property in 1946 for 18 million pesetas to Josep Ballvé i Pellisé, known for his department stores on , in partnership with the family of Pío Rubert Laporta. The Compañía Inmobiliaria Provenza, SA (CIPSA) was founded to administer the building. Roser Segimon continued to live on the main floor until her death in 1964. The new owners divided the first floor facing into five apartments instead of the original two. In 1953, they commissioned to convert 13 rubbish-filled attic laundry rooms to street-facing apartments, leaving a communal hallway on the side facing the courtyards. Some of these two or three room apartments had a loft and were designed and furnished in a typical early 1950s style using brick, ceramic and wood. Items of furniture, such as the , were reminiscent of Eero Saarinen's work. The insurance company Northern took over the main floor in 1966. By then, Casa Milà had housed a bingo hall, an academy and the offices of Cementos Molins and Inoxcrom among others. Maintenance costs were high and the owners had allowed the building to become dilapidated, causing stones to loosen in 1971. Josep Anton Comas made some emergency repairs, especially to the paintings in the courtyards, while respecting the original design. Restoration Gaudí's work was designated a historic and artistic monument on July 24, 1969. Casa Milà was in poor condition in the early 1980s. It had been painted a dreary brown and many of its interior color schemes had been abandoned or allowed to deteriorate, but it has been restored since and many of the original colors revived. In 1984, the building became part of a World Heritage Site encompassing some of Gaudí's works. The Barcelonan city council tried to rent the main floor as an office for the 1992 Olympic bid. Finally, the day before Christmas 1986, Caixa Catalunya bought La Pedrera for 900 million pesetas. On February 19, 1987, urgently needed work began on the restoration and cleaning of the façade. The work was done by the architects Joseph Emilio Hernández-Cros and Rafael Vila. The renovated main floor opened in 1990 as part of the Cultural Olympiad of Barcelona. The floor became an exhibition room with an example of modernism in the Eixample. Design The building is 1,323 m2 per floor on a plot of 1,620 m2. Gaudí made the first sketches in his workshop in the Sagrada Família. He designed the house as a constant curve, both outside and inside, incorporating ruled geometry and naturalistic elements. Casa Milà consists of two buildings, which are structured around two courtyards that provide light to the nine stories: basement, ground floor, mezzanine, main (or noble) floor, four upper floors, and an attic. The basement was intended to be the garage, the main floor the residence of the Milàs (a flat of all 1,323 m2), and the rest distributed over 20 apartments. The resulting layout is shaped like an asymmetrical "8" because of the different shapes and sizes of the courtyards. The attic housed the laundry and drying areas, forming an insulating space for the building and simultaneously determining the levels of the roof. One of the most notable elements of the building is the roof, crowned with skylights, staircase exits, fans, and chimneys. All of these elements, constructed out of brick covered with lime, broken marble, or glass have a specific architectural function but are also real sculptures integrated into the building. The apartments feature plastered ceilings with dynamic reliefs, handcrafted wooden doors, windows, and furniture, as well as hydraulic tiles and various ornamental elements. The stairways were intended as service entries, with the main access to the apartments by elevator except for the noble floor, where Gaudí added a prominent interior staircase. Gaudí wanted the people who lived in the flats to all know each other. Therefore, there were only elevators on every other floor, so people on different floors would meet one another. Structure Casa Milà is characterized by its self-supporting stone facade, meaning that it is free of load-bearing walls. The facade connects to the internal structure of each floor by means of curved iron beams surrounding the perimeter of each floor. This construction system allows, on one hand, large openings in the facade which give light to the homes, and on the other, free structuring of the different levels, so that internal walls can be added and demolished without affecting the stability of the building. This allows the owners to change their minds at will and to modify, without problems, the interior layout of the homes. Constructive and decorative items Facade The facade is composed of large blocks of limestone from the Garraf Massif on the first floor and from the Villefranche quarry for the higher levels. The blocks were cut to follow the plot of the projection of the model, then raised to their location and adjusted to align in a continuous curve to the pieces around them. Viewed from the outside the building has three parts: the main body of the six-storey blocks with winding stone floors, two floors set a block back with a different curve, similar to waves, a smoother texture and whiter color, and with small holes that look like embrasures, and finally the body of the roof. Gaudí's original facade had some of its lower-level ironwork removed. In 1928, the tailor Mosella opened the first store in La Pedrera, and he eliminated the bars. This did not concern anyone, because in the middle of twentieth century, wrought ironwork had little importance. The ironwork was lost until a few years later, when Americans donated one of them to the MoMa, where it is on display. With restoration initiatives launched in 1987, the facade was rejoined to some pieces of stone that had fallen. In order to respect the fidelity of the original, material was obtained from the Villefranche quarry, even though by then it was no longer operating. Hall and courtyards The building uses a completely original solution to solve the issue of a lobby being too closed and dark. Its open and airy courtyards provide a place of transit and are directly visible to those accessing the building. There are two patios on the side of the Passeig de Gracia and of the street Provence. Patios Patios, structurally, are key as supporting loads of interior facades. The floor of the courtyard is supported by pillars of cast iron. In the courtyard, there are traditional elliptical beams and girders but Gaudí applied an ingenious solution of using two concentric cylindrical beams with stretched radial beams, like the spokes of a bicycle. They form a point outside of the beam to two points above and below, making the function of the central girder a keystone and working in tension and compression simultaneously. This supported structure is twelve feet in diameter and is considered "the soul of the building" with a clear resemblance to Gothic crypts. The centerpiece was built in a shipyard by Josep Maria Carandell who copied a steering wheel, interpreting Gaudí's intent as to represent the helm of the ship of life. Interior, gates Access is protected by a massive iron gate with a design attributed to Jujol. It was originally used by both people and cars, as access to the garage is in the basement, now an auditorium. The two halls are fully polychrome with oil paintings on the plaster surfaces, with eclectic references to mythology and flowers. During construction there was a problem including a basement as a garage for cars, the new invention that was thrilling the bourgeois at the time. The future neighbor Felix Anthony Meadows, owner of Industrial Linera, requested a change because his Rolls-Royce could not access it. Gaudí agreed to remove a pillar on the ramp that led into the garage so that Felix, who was establishing sales and factory in Parets del Vallès, could go to both places with his car from La Pedrera. For the floors of Casa Milà, Gaudí used a model of floor forms of square timbers with two colors, and the hydraulic pavement hexagonal pieces of blue and sea motifs that had originally been designed for the Batllo house. The wax was designed in gray by John Bertrand under the supervision of Gaudí who "touched up with their own fingers," in the words of the manufacturer Josep Bay. Loft Like in Casa Batlló, Gaudí shows the application of the catenary arch as a support structure for the roof, a form which he had already used shortly after graduating in the wood frameworks of Mataró's cooperative known as "L'Obrera Mataronense." In this case, Gaudí used the Catalan technique of timbrel, imported from Italy in the fourteenth century. The attic, where the laundry rooms were located, was a clear room under a Catalan vault roof supported by 270 parabolic vaults of different heights and spaced by about 80 cm. The roof resembles both the ribs of a huge animal and a palm, giving the roof-deck a very unconventional shape similar to a landscape of hills and valleys. The shape and location of the courtyards makes the arches higher when the space is narrowed and lower when the space expands. The builder Bayó explained its construction: "First the face of a wide wall was filled with mortar and plastered. Then Canaleta indicated the opening of each arch and Bayó put a nail at each starting point of the arch at the top of the wall. From these nails was dangled a chain so that the lowest point coincided with the deflection of the arch. Then the profile displayed on the wall by the chain was drawn and on this profile the carpenter marked and placed the corresponding centering, and the timbrel vault was started with three rows of plane bricks. Gaudí wanted to add a longitudinal axis of bricks connecting all vaults at their keystones". Roof and chimneys The work of Gaudí on the rooftop of La Pedrera brought his experience at Palau Güell together with solutions that were clearly more innovative – this time creating shapes and volumes with more body, more prominence, and less polychromasia. On the rooftop there are six skylights/staircase exits (four of which were covered with broken pottery and some that ended in a double cross typical of Gaudí), twenty-eight chimneys in several groupings, two half-hidden vents whose function is to renew the air in the building, and four domes that discharged to the facade. The staircases also house the water tanks; some of which are snail-shaped. The stepped roof of La Pedrera, called "the garden of warriors" by the poet Pere Gimferrer because the chimneys appear to be protecting the skylights, has undergone a radical restoration, removing chimneys added in interventions after Gaudí, television antennas, and other elements that degraded the space. The restoration brought back the splendor to the chimneys and the skylights that were covered with fragments of marble and broken Valencia tiles. One of the chimneys was topped with glass pieces – it was said that Gaudí did that the day after the inauguration of the building, taking advantage of the empty bottles from the party. It was restored with the bases of champagne bottles from the early twentieth century. The repair work has enabled the restoration of the original impact of the overhangs made of stone from Ulldecona with fragments of tiles. This whole set is more colorful than the facade, although here the creamy tones are dominant. Furniture Gaudí, as he had done in Casa Batlló, designed furniture specifically for the main floor. This was part of the concept artwork itself integral to modernism in which the architect assumed responsibility for global issues such as the structure and the facade, as well as every detail of the decor, designing furniture and accessories such as lamps, planters, floors or ceilings. This was another point of friction with Segimon, who complained that there was no straight wall to place her Steinway piano. Gaudí's response was blunt: "So play the violin." The result of these disagreements has been the loss of the decorative legacy of Gaudí, as most of the furniture was removed due to climate change and the changes she made to the main floor when Gaudí died. Some remain in private collections, including a curtain made of oak 4 m. long by 1.96 m. high in the Museum of Catalan Modernism; and a chair and desktop of Milà. Gaudí carved oak doors similar to what he had done for the Casa y Bardes, but these were only included on two floors as when Segimon discovered the price, she decided there would be no more at that quality. Architecture Casa Milà is part of the UNESCO World Heritage Site "Works of Antoni Gaudí". It was a predecessor of some buildings with a similar biomorphic appearance: the 1921 Einstein Tower in Potsdam, designed by Erich Mendelsohn Solomon R. Guggenheim Museum in Manhattan, New York, designed by Frank Lloyd Wright Chapelle Notre Dame du Haut, Ronchamp, France, designed by Le Corbusier the Hundertwasserhaus and other works by Austrian architect Friedensreich Hundertwasser Disney Concert Hall in Los Angeles, by Frank Gehry Free exhibitions often are held on the first floor, which also provides some opportunity to see the interior design. There is a charge for entrance to the apartment on the fourth floor and the roof. The other floors are not open to visitors. Constructive similarities Gaudí's La Pedrera was inspired by a mountain, but there is no agreement as to which mountain was the reference model. Joan Bergós thought it was the rocks of Fray Guerau in Prades mountains. Joan Matamala thought that the model could have been St. Miquel del Fai, while the sculptor Vicente Vilarubias believed it was inspired by the cliffs Torrent Pareis in Menorca. Other options include the mountains of Uçhisar in Cappadocia, suggested by Juan Goytisolo, or Mola Gallifa, suggested by Louis Permanyer, based on the fact that Gaudí visited the area in 1885 to escape an outbreak of cholera in Barcelona. Some people say that the interior layout of La Pedrera comes from studies that Gaudí made of medieval fortresses. This image is reinforced by the seeming appearance of the rooftop chimneys as "sentinels" with great helmets. The structure of the iron door in the lobby does not follow any symmetry, straight or repetitive pattern. Rather, it evokes bubbles of soap that are formed between the hands or the structures of a plant cell. Criticism and controversy The building's unconventional style made it the subject of much criticism. It was given the nickname "La Pedrera", meaning "the quarry". Casa Milà appeared in many satirical magazines. Joan Junceda presented it as a traditional "Easter cake" by means of cartoons in Patufet. Joaquim Garcia made a joke about the difficulty of setting the damask wrought iron balconies in his magazine. Homeowners in Passeig de Gracia became angry with Milà and ceased to greet him, arguing that the weird building by Gaudí would lower the price of land in the area. Administrative problems Casa Milà also caused some administrative problems. In December 1907 the City Hall stopped work on the building because of a pillar which occupied part of the sidewalk, not respecting the alignment of facades. Again on August 17, 1908, more problems occurred when the building surpassed the predicted height and borders of its construction site by . The Council called for a fine of 100,000 pesetas (approximately 25% of the cost of work) or for the demolition of the attic and roof. The dispute was resolved a year and a half later, December 28, 1909, when the Commission certified that it was a monumental building and thus not required to have a 'strict compliance' with the bylaws. Design competitions The owner entered La Pedrera in the annual sponsored by the Barcelona City Council (Ayuntament). Other entries in the competition included two works by Sagnier (Calle Mallorca 264, and one on Corsica and Av. Diagonal), the by architect , and the , designed by . Although the most dramatic and clear favorite was Casa Milà, the jury opined that even though the facades were complete, "there's still a lot left to do before it's fully completed, finalized and in a perfect state of appreciation." The winner in 1910 was Samanillo Perez, for his building which now houses the headquarters of the Circulo Ecuestre. Design disagreements Gaudí's relations with Segimon deteriorated during the construction and decoration of the house. There were many disagreements between them, one example was the monumental bronze virgin del Rosario, which Gaudí wanted as the statue on the front of the building in homage to the name of the owner, that the artist Carles Mani i Roig was to sculpt. The statue was not made although the words "Ave gratia M plena Dominus tecum" were written at the top of the facade. Continuing disagreements led Gaudí to take Milà to court over his fees. The lawsuit was won by Gaudí in 1916, and he gave the 105,000 pesetas he won in the case to charity, stating that "the principles mattered more than money." Milà was having to pay the mortgage. After Gaudí's death in 1926, Segimon got rid of most of the furniture that Gaudí had designed and covered over parts of Gaudí's designs with new decorations in the style of Louis XVI. La Pedrera was acquired in 1986 by and when restoration was done four years later, some of the original decorations re-emerged. When the Civil War broke out in July 1936, the Milàs were on vacation. Part of the building was collectivized by the Unified Socialist Party of Catalonia; the Milàs fled the area with some artwork. In media and literature A scene in The Passenger (Italian: Professione: reporter), a film directed by Michelangelo Antonioni and starring Jack Nicholson and Maria Schneider, was filmed on the roof of the building. A scene filmed on the roof in Vicky Cristina Barcelona, directed by Woody Allen. A major part in the story "A murderer is born" in the novel Seiobo There Below by László Krasznahorkai happens here Mentioned in the book by Eoin Colfer: Artemis Fowl and the Lost Colony Mentioned in the book by Trudi Alexy 'The Mezuzah in the Madonna's Foot' Mentioned in the 'Ballrooms and Biscotti' episode (season 4, episode 1) of Gilmore Girls Several scenes in the movie, Gaudi Afternoon A scale model exhibited at the Catalunya en Miniatura park. Featured in the music video for Deep Forest's 'Sweet Lullaby' The home of Edmond Kirsch in Dan Brown's novel Origin, the 5th book featuring Robert Langdon. Gallery See also List of Modernisme buildings in Barcelona References Rainer Zervst. Gaudí, 1852–1926, Antoni Gaudí i Cornet – A Life Devoted to Architecture. Cologne: Benedikt Taschen Verlag GmbH & Co. KG., 1988. p176. External links La Pedrera Official Website Virtual tour Immersive photographies of Casa Milà Link pictures La Casa Milà, furniture and decorative arts Visionary environments Buildings and structures in Barcelona Passeig de Gràcia World Heritage Sites in Catalonia Antoni Gaudí buildings Tourist attractions in Barcelona Apartment buildings in Spain Residential buildings completed in 1910 Eixample Modernisme architecture in Barcelona Art Nouveau apartment buildings

1327

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

Antiparticle

In particle physics, every type of particle is associated with an antiparticle with the same mass but with opposite physical charges (such as electric charge). For example, the antiparticle of the electron is the positron (also known as an antielectron). While the electron has a negative electric charge, the positron has a positive electric charge, and is produced naturally in certain types of radioactive decay. The opposite is also true: the antiparticle of the positron is the electron. Some particles, such as the photon, are their own antiparticle. Otherwise, for each pair of antiparticle partners, one is designated as the normal particle (the one that occurs in matter usually interacted with in daily life). The other (usually given the prefix "anti-") is designated the antiparticle. Particle–antiparticle pairs can annihilate each other, producing photons; since the charges of the particle and antiparticle are opposite, total charge is conserved. For example, the positrons produced in natural radioactive decay quickly annihilate themselves with electrons, producing pairs of gamma rays, a process exploited in positron emission tomography. The laws of nature are very nearly symmetrical with respect to particles and antiparticles. For example, an antiproton and a positron can form an antihydrogen atom, which is believed to have the same properties as a hydrogen atom. This leads to the question of why the formation of matter after the Big Bang resulted in a universe consisting almost entirely of matter, rather than being a half-and-half mixture of matter and antimatter. The discovery of charge parity violation helped to shed light on this problem by showing that this symmetry, originally thought to be perfect, was only approximate. Because charge is conserved, it is not possible to create an antiparticle without either destroying another particle of the same charge (as is for instance the case when antiparticles are produced naturally via beta decay or the collision of cosmic rays with Earth's atmosphere), or by the simultaneous creation of both a particle and its antiparticle, which can occur in particle accelerators such as the Large Hadron Collider at CERN. Although particles and their antiparticles have opposite charges, electrically neutral particles need not be identical to their antiparticles. The neutron, for example, is made out of quarks, the antineutron from antiquarks, and they are distinguishable from one another because neutrons and antineutrons annihilate each other upon contact. However, other neutral particles are their own antiparticles, such as photons, Z0 bosons,  mesons, and hypothetical gravitons and some hypothetical WIMPs. History Experiment In 1932, soon after the prediction of positrons by Paul Dirac, Carl D. Anderson found that cosmic-ray collisions produced these particles in a cloud chamber— a particle detector in which moving electrons (or positrons) leave behind trails as they move through the gas. The electric charge-to-mass ratio of a particle can be measured by observing the radius of curling of its cloud-chamber track in a magnetic field. Positrons, because of the direction that their paths curled, were at first mistaken for electrons travelling in the opposite direction. Positron paths in a cloud-chamber trace the same helical path as an electron but rotate in the opposite direction with respect to the magnetic field direction due to their having the same magnitude of charge-to-mass ratio but with opposite charge and, therefore, opposite signed charge-to-mass ratios. The antiproton and antineutron were found by Emilio Segrè and Owen Chamberlain in 1955 at the University of California, Berkeley. Since then, the antiparticles of many other subatomic particles have been created in particle accelerator experiments. In recent years, complete atoms of antimatter have been assembled out of antiprotons and positrons, collected in electromagnetic traps. Dirac hole theory Solutions of the Dirac equation contain negative energy quantum states. As a result, an electron could always radiate energy and fall into a negative energy state. Even worse, it could keep radiating infinite amounts of energy because there were infinitely many negative energy states available. To prevent this unphysical situation from happening, Dirac proposed that a "sea" of negative-energy electrons fills the universe, already occupying all of the lower-energy states so that, due to the Pauli exclusion principle, no other electron could fall into them. Sometimes, however, one of these negative-energy particles could be lifted out of this Dirac sea to become a positive-energy particle. But, when lifted out, it would leave behind a hole in the sea that would act exactly like a positive-energy electron with a reversed charge. These holes were interpreted as "negative-energy electrons" by Paul Dirac and mistakenly identified with protons in his 1930 paper A Theory of Electrons and Protons However, these "negative-energy electrons" turned out to be positrons, and not protons. This picture implied an infinite negative charge for the universe—a problem of which Dirac was aware. Dirac tried to argue that we would perceive this as the normal state of zero charge. Another difficulty was the difference in masses of the electron and the proton. Dirac tried to argue that this was due to the electromagnetic interactions with the sea, until Hermann Weyl proved that hole theory was completely symmetric between negative and positive charges. Dirac also predicted a reaction  +  →  + , where an electron and a proton annihilate to give two photons. Robert Oppenheimer and Igor Tamm, however, proved that this would cause ordinary matter to disappear too fast. A year later, in 1931, Dirac modified his theory and postulated the positron, a new particle of the same mass as the electron. The discovery of this particle the next year removed the last two objections to his theory. Within Dirac's theory, the problem of infinite charge of the universe remains. Some bosons also have antiparticles, but since bosons do not obey the Pauli exclusion principle (only fermions do), hole theory does not work for them. A unified interpretation of antiparticles is now available in quantum field theory, which solves both these problems by describing antimatter as negative energy states of the same underlying matter field, i.e. particles moving backwards in time. Particle–antiparticle annihilation If a particle and antiparticle are in the appropriate quantum states, then they can annihilate each other and produce other particles. Reactions such as  +  →  (the two-photon annihilation of an electron-positron pair) are an example. The single-photon annihilation of an electron-positron pair,  +  → , cannot occur in free space because it is impossible to conserve energy and momentum together in this process. However, in the Coulomb field of a nucleus the translational invariance is broken and single-photon annihilation may occur. The reverse reaction (in free space, without an atomic nucleus) is also impossible for this reason. In quantum field theory, this process is allowed only as an intermediate quantum state for times short enough that the violation of energy conservation can be accommodated by the uncertainty principle. This opens the way for virtual pair production or annihilation in which a one particle quantum state may fluctuate into a two particle state and back. These processes are important in the vacuum state and renormalization of a quantum field theory. It also opens the way for neutral particle mixing through processes such as the one pictured here, which is a complicated example of mass renormalization. Properties Quantum states of a particle and an antiparticle are interchanged by the combined application of charge conjugation , parity and time reversal . and are linear, unitary operators, is antilinear and antiunitary, . If denotes the quantum state of a particle with momentum and spin whose component in the z-direction is , then one has where denotes the charge conjugate state, that is, the antiparticle. In particular a massive particle and its antiparticle transform under the same irreducible representation of the Poincaré group which means the antiparticle has the same mass and the same spin. If , and can be defined separately on the particles and antiparticles, then where the proportionality sign indicates that there might be a phase on the right hand side. As anticommutes with the charges, , particle and antiparticle have opposite electric charges q and -q. Quantum field theory This section draws upon the ideas, language and notation of canonical quantization of a quantum field theory. One may try to quantize an electron field without mixing the annihilation and creation operators by writing where we use the symbol k to denote the quantum numbers p and σ of the previous section and the sign of the energy, E(k), and ak denotes the corresponding annihilation operators. Of course, since we are dealing with fermions, we have to have the operators satisfy canonical anti-commutation relations. However, if one now writes down the Hamiltonian then one sees immediately that the expectation value of H need not be positive. This is because E(k) can have any sign whatsoever, and the combination of creation and annihilation operators has expectation value 1 or 0. So one has to introduce the charge conjugate antiparticle field, with its own creation and annihilation operators satisfying the relations where k has the same p, and opposite σ and sign of the energy. Then one can rewrite the field in the form where the first sum is over positive energy states and the second over those of negative energy. The energy becomes where E0 is an infinite negative constant. The vacuum state is defined as the state with no particle or antiparticle, i.e., and . Then the energy of the vacuum is exactly E0. Since all energies are measured relative to the vacuum, H is positive definite. Analysis of the properties of ak and bk shows that one is the annihilation operator for particles and the other for antiparticles. This is the case of a fermion. This approach is due to Vladimir Fock, Wendell Furry and Robert Oppenheimer. If one quantizes a real scalar field, then one finds that there is only one kind of annihilation operator; therefore, real scalar fields describe neutral bosons. Since complex scalar fields admit two different kinds of annihilation operators, which are related by conjugation, such fields describe charged bosons. Feynman–Stueckelberg interpretation By considering the propagation of the negative energy modes of the electron field backward in time, Ernst Stueckelberg reached a pictorial understanding of the fact that the particle and antiparticle have equal mass m and spin J but opposite charges q. This allowed him to rewrite perturbation theory precisely in the form of diagrams. Richard Feynman later gave an independent systematic derivation of these diagrams from a particle formalism, and they are now called Feynman diagrams. Each line of a diagram represents a particle propagating either backward or forward in time. In Feynman diagrams, anti-particles are shown traveling backwards in time relative to normal matter, and vice versa. This technique is the most widespread method of computing amplitudes in quantum field theory today. Since this picture was first developed by Stueckelberg, and acquired its modern form in Feynman's work, it is called the Feynman–Stueckelberg interpretation of antiparticles to honor both scientists. See also List of particles Antimatter Gravitational interaction of antimatter Parity, charge conjugation, and time reversal symmetry CP violations Quantum field theory Baryogenesis, baryon asymmetry, and Leptogenesis One-electron universe Paul Dirac Notes References External links Antimatter at CERN Subatomic particles Quantum field theory Antimatter Particle physics

1331

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

Arabian Prince

Kim Renard Nazel (born June 17, 1965), better known by his stage names Arabian Prince or Professor X, is an American rapper, singer, songwriter, record producer, and DJ. He is best known as a founding member of N.W.A. Early life Nazel was born in Compton, California to the son of Joseph "Skippy" Nazel Jr., a prominent African-American author and radio talk show host. His musical background came from his mother, a piano teacher and classical musician. His family tried its best to shelter him, sending him to a Catholic school and keeping him busy with football to keep him away from the gangs. The younger Nazel got his first experience with making music at the radio station his father hosted his talk show on; Nazel used the radio station's equipment to put together mixtapes that he would sell at school. Nazel went on to graduate from Junípero Serra High School in nearby Gardena. Music career Nazel took the stage name of DJ Prince and started selling mixtapes at school. While working at a luggage store at the Del Amo Mall, its owner, Sam Nassif, asked him to DJ a party at a community center. He kept performing there for several weekends and the success persuaded Nassif to invest even more in the place, renaming it "The Cave", where Nazel would continue to host for over three years and even after his N.W.A. days. Nassif also funded DJ Prince's first record, "Strange Life". He changed his stage name when he was 15 years old at the Skateland USA, the same skating venue credited for launching the NWA a few years later, due to a fan's suggestion. He said about his name: Arabian Prince started working with Bobby Jimmy & the Critters in 1984. He also produced the hit single and album for J.J. Fad, "Supersonic". In 1986, he was a founding member of N.W.A, but soon after fellow member Ice Cube came back from the Phoenix Institute of Technology in 1988, Arabian Prince left over royalty and contract disagreements. "I started off as a solo artist", he said, "so I was aware of what a royalty statement was. I knew that when these many records were sold, there is a quarterly statement. When you look at it, you can see how much money was paid and then share it. This was not the case. We were also never paid for touring." Eazy-E, Ice Cube and MC Ren remained as the main performers, DJ Yella was the turntablist and Dr. Dre was the main producer. After leaving N.W.A, Arabian Prince began a solo career. His first album, Brother Arab, was released in 1989 with the single "She's Got A Big Posse"; Where's My Bytches followed in 1993. In the mid-2000s, he started releasing music again, with his Professor X project on the Dutch label Clone Records. "I could not release the record under Arabian Prince", he said, "because I already had a single out, so I called myself Professor X on that record." In 2007, he performed as a DJ on the 2K Sports Holiday Bounce Tour with artists from the Stones Throw label. In 2008, Stones Throw released a compilation of his electro-rap material from the 1980s. One of his songs was included on the 2007 video game, College Hoops 2K8. In 2015, a biopic about N.W.A. titled Straight Outta Compton was released; however, Arabian Prince was not portrayed in the film, and his role was omitted completely. The following year, N.W.A. was inducted into the Rock and Roll Hall of Fame, but again, Arabian Prince was not included nor mentioned. In 2018, Arabian Prince appeared on the AmeriKKKant album of industrial-metal band Ministry. He made a second appearance on Ministry's 2021 album Moral Hygiene. Other ventures Aside from his music career, he worked in special effects, 3D animation and video games. Straight Outta Compton movie controversy After the release of the NWA film, Straight Outta Compton, in 2015, Arabian Prince said to VladTV: "A lot of the scenes in real life, I was there -I'm just not there in the film, which I'm like, if you're gonna write me out of a movie, shoot some other scenes. Don't write scenes where I was there." Some of the pivotal scenes would be choosing the name for the band, the tour and the infamous Detroit concert. He also remembers himself as the main opposer to Jerry Heller about the royalties and the money, a role that in the movie was instead given to Ice Cube. Discography Solo Strange Life (1984) Rapsur Records Brother Arab (1989) Orpheus Records Where's My Bytches (1993) Da Bozak Records Compilations Situation Hot (1990) Macola Records Innovative Life: The Anthology, 1984–1989 (2008) Stones Throw Records Professor X (2007/2008) Clone Records With N.W.A "Panic Zone" (Single) (1987) N.W.A. and the Posse (1987) Straight Outta Compton (1988) References External links Interview with Arabian Prince & Biography on westcoastpioneers August 2008 Interview with L.A. Record Arabian Prince RBMA lecture Arabian Prince: What Happened After N.W.A. and the Posse? at Phoenix New Times DJ Arabian Prince Interview NAMM Oral History Library (2020) 1964 births Living people African-American male rappers Musicians from Compton, California N.W.A members Ruthless Records artists 20th-century American rappers 21st-century American rappers American hip hop singers African-American male singer-songwriters 20th-century African-American male singers 21st-century African-American male singers Singer-songwriters from California

1332

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

August 7

Events Pre-1600 461 – Roman Emperor Majorian is beheaded near the river Iria in north-west Italy following his arrest and deposition by the magister militum Ricimer. 626 – The Avar and Slav armies leave the siege of Constantinople. 768 – Pope Stephen III is elected to office, and quickly seeks Frankish protection against the Lombard threat, since the Byzantine Empire is no longer able to help. 936 – Coronation of King Otto I of Germany. 1461 – The Ming dynasty Chinese military general Cao Qin stages a coup against the Tianshun Emperor. 1479 – Battle of Guinegate: French troops of King Louis XI were defeated by the Burgundians led by Archduke Maximilian of Habsburg. 1601–1900 1679 – The brigantine Le Griffon, commissioned by René-Robert Cavelier, Sieur de La Salle, is towed to the south-eastern end of the Niagara River, to become the first ship to sail the upper Great Lakes of North America. 1714 – The Battle of Gangut: The first important victory of the Russian Navy. 1743 – The Treaty of Åbo ended the 1741–1743 Russo-Swedish War. 1782 – George Washington orders the creation of the Badge of Military Merit to honor soldiers wounded in battle. It is later renamed to the more poetic Purple Heart. 1786 – The first federal Indian Reservation is created by the United States. 1789 – The United States Department of War is established. 1791 – American troops destroy the Miami town of Kenapacomaqua near the site of present-day Logansport, Indiana in the Northwest Indian War. 1794 – U.S. President George Washington invokes the Militia Acts of 1792 to suppress the Whiskey Rebellion in western Pennsylvania. 1819 – Simón Bolívar triumphs over Spain in the Battle of Boyacá. 1858 – The first Australian rules football match is played between Melbourne Grammar and Scotch College. 1890 – Anna Månsdotter, found guilty of the 1889 Yngsjö murder, became the last woman to be executed in Sweden. 1901–present 1909 – Alice Huyler Ramsey and three friends become the first women to complete a transcontinental auto trip, taking 59 days to travel from New York, New York to San Francisco, California. 1927 – The Peace Bridge opens between Fort Erie, Ontario and Buffalo, New York. 1930 – The last confirmed lynching of black people in the Northern United States occurs in Marion, Indiana; two men, Thomas Shipp and Abram Smith, are killed. 1933 – The Kingdom of Iraq slaughters over 3,000 Assyrians in the village of Simele. This date is recognized as Martyrs Day or National Day of Mourning by the Assyrian community in memory of the Simele massacre. 1942 – World War II: The Battle of Guadalcanal begins as the United States Marines initiate the first American offensive of the war with landings on Guadalcanal and Tulagi in the Solomon Islands. 1944 – IBM dedicates the first program-controlled calculator, the Automatic Sequence Controlled Calculator (known best as the Harvard Mark I). 1946 – The government of the Soviet Union presented a note to its Turkish counterparts which refuted the latter's sovereignty over the Turkish Straits, thus beginning the Turkish Straits crisis. 1947 – Thor Heyerdahl's balsa wood raft, the Kon-Tiki, smashes into the reef at Raroia in the Tuamotu Islands after a 101-day, journey across the Pacific Ocean in an attempt to prove that pre-historic peoples could have traveled from South America. 1947 – The Bombay Municipal Corporation formally takes over the Bombay Electric Supply and Transport (BEST). 1959 – Explorer program: Explorer 6 launches from the Atlantic Missile Range in Cape Canaveral, Florida. 1960 – Ivory Coast becomes independent from France. 1962 – Canadian-born American pharmacologist Frances Oldham Kelsey is awarded the U.S. President's Award for Distinguished Federal Civilian Service for her refusal to authorize thalidomide. 1964 – Vietnam War: The U.S. Congress passes the Gulf of Tonkin Resolution giving U.S. President Lyndon B. Johnson broad war powers to deal with North Vietnamese attacks on American forces. 1969 – Richard Nixon appoints Luis R. Bruce, a Mohawk-Oglala Sioux and co-founder of the National Congress of American Indians, as the new commissioner of the Bureau of Indian Affairs. 1970 – California judge Harold Haley is taken hostage in his courtroom and killed during an effort to free George Jackson from police custody. 1974 – Philippe Petit performs a high wire act between the twin towers of the World Trade Center in the air. 1976 – Viking program: Viking 2 enters orbit around Mars. 1978 – U.S. President Jimmy Carter declares a federal emergency at Love Canal due to toxic waste that had been disposed of negligently. 1981 – The Washington Star ceases all operations after 128 years of publication. 1985 – Takao Doi, Mamoru Mohri and Chiaki Mukai are chosen to be Japan's first astronauts. 1987 – Cold War: Lynne Cox becomes the first person to swim from the United States to the Soviet Union, crossing the Bering Strait from Little Diomede Island in Alaska to Big Diomede in the Soviet Union. 1989 – U.S. Congressman Mickey Leland (D-TX) and 15 others die in a plane crash in Ethiopia. 1990 – First American soldiers arrive in Saudi Arabia as part of the Gulf War. 1993 – Ada Deer, a Menominee activist, is sworn in as the head of the Bureau of Indian Affairs. 1995 – The Chilean government declares state of emergency in the southern half of the country in response to an event of intense, cold, wind, rain and snowfall known as the White Earthquake. 1997 – Space Shuttle Program: The Space Shuttle Discovery launches on STS-85 from the Kennedy Space Center in Cape Canaveral, Florida. 1997 – Fine Air Flight 101 crashes after takeoff from Miami International Airport, killing five people. 1998 – Bombings at United States embassies in Dar es Salaam, Tanzania and Nairobi, Kenya kill approximately 212 people. 1999 – The Chechnya-based Islamic International Brigade invades neighboring Dagestan. 2007 – At AT&T Park, Barry Bonds hits his 756th career home run to surpass Hank Aaron's 33-year-old record. 2008 – The start of the Russo-Georgian War over the territory of South Ossetia. 2020 – Air India Express Flight 1344 overshoots the runway at Calicut International Airport in the Malappuram district of Kerala, India, and crashes, killing 21 of the 190 people on board. Births Pre-1600 317 – Constantius II, Roman emperor (d. 361) 1282 – Elizabeth of Rhuddlan (d. 1316) 1533 – Alonso de Ercilla, Spanish soldier and poet (d. 1595) 1560 – Elizabeth Báthory, Hungarian aristocrat and purported serial killer (d. 1614) 1571 – Thomas Lupo, English viol player and composer (d. 1627) 1574 – Robert Dudley, English explorer and cartographer (d. 1649) 1598 – Georg Stiernhielm, Swedish poet and linguist (d. 1672) 1601–1900 1613 – William Frederick, Prince of Nassau-Dietz, Dutch stadtholder (d. 1664) 1702 – Muhammad Shah, Mughal emperor of India (d. 1748) 1726 – James Bowdoin, American banker and politician, 2nd Governor of Massachusetts (d. 1790) 1742 – Nathanael Greene, American general (d. 1786) 1751 – Wilhelmina of Prussia, Princess of Orange (d. 1820) 1779 – Carl Ritter, German geographer and academic (d. 1859) 1826 – August Ahlqvist, Finnish professor, poet, scholar of the Finno-Ugric languages, author, and literary critic (d. 1889) 1844 – Auguste Michel-Lévy, French geologist and author (d. 1911) 1860 – Alan Leo, English astrologer and author (d. 1917) 1862 – Henri Le Sidaner, French painter (d. 1939) 1862 – Victoria of Baden (d. 1931) 1867 – Emil Nolde, Danish-German painter and illustrator (d. 1956) 1868 – Ladislaus Bortkiewicz, Russian-German economist and statistician (d. 1931) 1868 – Huntley Wright, English actor (d. 1941) 1869 – Mary Frances Winston, American mathematician (d. 1959) 1876 – Mata Hari, Dutch dancer and spy (d. 1917) 1879 – Johannes Kotze, South African cricketer (d. 1931) 1884 – Billie Burke, American actress and singer (d. 1970) 1884 – Nikolai Triik, Estonian painter and illustrator (d. 1940) 1887 – Anna Elisabet Weirauch, German author and playwright (d. 1970) 1890 – Elizabeth Gurley Flynn, American author and activist (d. 1964) 1901–present 1901 – Ann Harding, American actress and singer (d. 1981) 1903 – Louis Leakey, Kenyan-English palaeontologist and archaeologist (d. 1972) 1904 – Ralph Bunche, American political scientist, academic, and diplomat, Nobel Prize laureate (d. 1971) 1907 – Albert Kotin, Belarusian-American soldier and painter (d. 1980) 1910 – Freddie Slack, American pianist and bandleader (d. 1965) 1911 – István Bibó, Hungarian lawyer and politician (d. 1979) 1911 – Nicholas Ray, American director and screenwriter (d. 1979) 1913 – George Van Eps, American guitarist (d. 1998) 1916 – Kermit Love, American actor, puppeteer, and costume designer (d. 2008) 1918 – C. Buddingh', Dutch poet and translator (d. 1985) 1918 – Gordon Zahn, American sociologist and author (d. 2007) 1921 – Manitas de Plata, French guitarist (d. 2014) 1921 – Karel Husa, Czech-American composer and conductor (d. 2016) 1924 – Kenneth Kendall, Indian-English journalist and actor (d. 2012) 1925 – Felice Bryant, American songwriter (d. 2003) 1926 – Stan Freberg, American puppeteer, voice actor, and singer (d. 2015) 1927 – Rocky Bridges, American baseball player and coach (d. 2015) 1927 – Edwin Edwards, American soldier, lawyer, and politician, 50th Governor of Louisiana (d. 2021) 1927 – Art Houtteman, American baseball player and journalist (d. 2003) 1928 – Betsy Byars, American author and academic (d. 2020) 1928 – Owen Luder, English architect, designed Tricorn Centre and Trinity Square (d. 2021) 1928 – James Randi, Canadian-American stage magician and author (d. 2020) 1929 – Don Larsen, American baseball player (d. 2020) 1930 – Togrul Narimanbekov, Azerbaijani-French painter and academic (d. 2013) 1930 – Veljo Tormis, Estonian composer and educator (d. 2017) 1931 – Jack Good, British television producer (d. 2017) 1931 – Charles E. Rice, American scholar and author (d. 2015) 1932 – Abebe Bikila, Ethiopian runner (d. 1973) 1932 – Edward Hardwicke, English actor (d. 2011) 1932 – Rien Poortvliet, Dutch painter and illustrator (d. 1995) 1932 – Maurice Rabb, Jr., American ophthalmologist and academic (d. 2005) 1933 – Eddie Firmani, South African footballer and manager 1933 – Elinor Ostrom, American economist and academic, Nobel Prize laureate (d. 2012) 1933 – Jerry Pournelle, American journalist and author (d. 2017) 1933 – Alberto Romulo, Filipino politician and diplomat 1934 – Sándor Simó, Hungarian director, producer, and screenwriter (d. 2001) 1935 – Lee Corso, American college football coach and broadcaster 1935 – Rahsaan Roland Kirk, American saxophonist and composer (d. 1977) 1937 – Zoltán Berczik, Hungarian table tennis player and coach (d. 2011) 1937 – Don Wilson, English cricketer and coach (d. 2012) 1940 – Jean-Luc Dehaene, French-Belgian lawyer and politician, 63rd Prime Minister of Belgium (d. 2014) 1940 – Uwe Nettelbeck, German record producer, journalist and film critic (d. 2007) 1941 – Matthew Evans, Baron Evans of Temple Guiting, English publisher and politician (d. 2016) 1942 – Garrison Keillor, American humorist, novelist, short story writer, and radio host 1942 – Carlos Monzon, Argentinian boxer and actor (d. 1995) 1942 – Caetano Veloso, Brazilian singer-songwriter, writer and producer 1942 – Richard Sykes, English biochemist and academic 1942 – B. J. Thomas, American singer (d. 2021) 1943 – Mohammed Badie, Egyptian religious leader 1943 – Lana Cantrell, Australian singer-songwriter and lawyer 1943 – Alain Corneau, French director and screenwriter (d. 2010) 1944 – John Glover, American actor 1944 – Robert Mueller, American soldier and lawyer, 6th Director of the Federal Bureau of Investigation 1945 – Kenny Ireland, Scottish actor and director (d. 2014) 1945 – Alan Page, American football player and jurist 1947 – Franciscus Henri, Dutch-Australian singer-songwriter 1947 – Sofia Rotaru, Ukrainian singer-songwriter, producer, and actress 1948 – Marty Appel, American businessman and author 1948 – Greg Chappell, Australian cricketer and coach 1949 – Walid Jumblatt, Lebanese journalist and politician 1949 – Matthew Parris, South African-English journalist and politician 1950 – Rodney Crowell, American singer-songwriter and guitarist 1950 – Alan Keyes, American politician and diplomat, 16th Assistant Secretary of State for International Organization Affairs 1950 – S. Thandayuthapani, Sri Lankan educator and politician 1952 – Caroline Aaron, American actress and producer 1952 – Eamonn Darcy, Irish golfer 1952 – Kees Kist, Dutch footballer 1952 – Alexei Sayle, English comedian, actor, and author 1953 – Anne Fadiman, American journalist and author 1954 – Valery Gazzaev, Russian footballer, manager and politician 1954 – Jonathan Pollard, Israeli spy 1954 – Alan Reid, Scottish politician 1955 – Wayne Knight, American actor, comedian and voice actor 1955 – Greg Nickels, American lawyer and politician, 51st Mayor of Seattle 1955 – Vladimir Sorokin, Russian author and playwright 1957 – Daire Brehan, Irish journalist, lawyer, and actress (d. 2012) 1957 – Alexander Dityatin, Russian gymnast and colonel 1958 – Russell Baze, Canadian-American jockey 1958 – Bruce Dickinson, English singer-songwriter and guitarist 1958 – Alberto Salazar, Cuban-American runner and coach 1959 – Koenraad Elst, Belgian orientalist and author 1959 – Ali Shah, Zimbabwean cricketer and coach 1960 – David Duchovny, American actor, director, producer, and screenwriter 1961 – Brian Conley, English actor and singer 1961 – Yelena Davydova, Russian gymnast 1961 – Walter Swinburn, English jockey and trainer (d. 2016) 1961 – Carlos Vives, Colombian singer, songwriter, and actor 1962 – Alison Brown, American banjo player, songwriter, and producer 1963 – Paul Dunn, Australian rugby league player 1963 – Nick Gillespie, American journalist and author 1963 – Marcus Roberts, American pianist and educator 1964 – John Birmingham, English-Australian journalist and author 1964 – Ian Dench, English guitarist and songwriter 1964 – Peter Niven, Scottish jockey 1965 – Raul Malo, American singer-songwriter, guitarist, and producer 1965 – Elizabeth Manley, Canadian figure skater 1966 – David Cairns, Scottish laicised priest and politician, Minister of State for Scotland (d. 2011) 1966 – Shobna Gulati, British actress 1966 – Kristin Hersh, American singer-songwriter and guitarist 1966 – Jimmy Wales, American-British entrepreneur, co-founder of Wikipedia 1967 – Jason Grimsley, American baseball player 1968 – Francesca Gregorini, Italian-American director and screenwriter 1968 – Trevor Hendy, Australian surfer and coach 1968 – Sophie Lee, Australian actress and author 1969 – Paul Lambert, Scottish footballer and manager 1969 – Dana G. Peleg, Israeli writer and LGBT activist 1970 – Eric Namesnik, American swimmer (d. 2006) 1971 – Dominic Cork, England cricketer and sportscaster 1971 – Rachel York, American actress and singer 1972 – Gerry Peñalosa, Filipino boxer and promoter 1973 – Mikhail Gorsheniov, Russian singer-songwriter (d. 2013) 1973 – Danny Graves, Vietnamese-American baseball player 1973 – Kevin Muscat, English-Australian footballer, coach, and manager 1974 – Chico Benymon, American actor 1974 – Michael Shannon, American actor 1975 – Koray Candemir, Turkish singer-songwriter 1975 – Gerard Denton, Australian cricketer 1975 – Megan Gale, Australian model and actress 1975 – Ray Hill, American football player (d. 2015) 1975 – Rebecca Kleefisch, American journalist and politician, 44th Lieutenant Governor of Wisconsin 1975 – Édgar Rentería, Colombian baseball player 1975 – Charlize Theron, South African actress 1976 – Dimitrios Eleftheropoulos, Greek footballer and manager 1976 – Shane Lechler, American football player 1977 – Charlotte Ronson, English fashion designer 1977 – Samantha Ronson, English singer-songwriter and DJ 1977 – Justin Brooker, Rugby League Player 1978 – Alexandre Aja, French director, producer, and screenwriter 1978 – Jamey Jasta, American singer-songwriter 1978 – Mark McCammon, English-Barbadian footballer 1978 – Cirroc Lofton, American actor 1979 – Eric Johnson, American actor, director, and screenwriter 1979 – Miguel Llera, Spanish footballer 1979 – Birgit Zotz, Austrian anthropologist and author 1980 – Carsten Busch, German footballer 1980 – Aurélie Claudel, French model and actress 1980 – Tácio Caetano Cruz Queiroz, Brazilian footballer 1980 – Seiichiro Maki, Japanese footballer 1981 – David Testo, American soccer player 1981 – Randy Wayne, American actor and producer 1982 – Ángeles Balbiani, Argentine actress and singer 1982 – Abbie Cornish, Australian actress 1982 – Juan Martín Hernández, Argentine rugby player 1982 – Marquise Hill, American football player (d. 2007) 1982 – Vassilis Spanoulis, Greek basketball player 1982 – Martin Vučić, Macedonian singer and drummer 1983 – Christian Chávez, Mexican singer-songwriter and actor 1983 – Murat Dalkılıç, Turkish singer-songwriter 1983 – Danny, Portuguese footballer 1983 – Andriy Hrivko, Ukrainian cyclist 1983 – Mark Pettini, English cricketer and journalist 1984 – Stratos Perperoglou, Greek basketball player 1984 – Tooba Siddiqui, Pakistani model and actress 1984 – Yun Hyon-seok, South Korean poet and author (d. 2003) 1986 – Paul Biedermann, German swimmer 1986 – Valter Birsa, Slovenian footballer 1986 – Altaír Jarabo, Mexican model and actress 1986 – Juan de la Rosa, Mexican boxer 1987 – Sidney Crosby, Canadian ice hockey player 1987 – Mustapha Dumbuya, Sierra Leonean footballer 1987 – Ryan Lavarnway, American baseball player 1987 – Rouven Sattelmaier, German footballer 1988 – Jonathan Bernier, Canadian ice hockey player 1988 – Mohamed Coulibaly, Senegalese footballer 1988 – Anisa Mohammed, West Indian cricketer 1988 – Melody Oliveria, American blogger 1988 – Erik Pieters, Dutch footballer 1988 – Beanie Wells, American football player 1989 – DeMar DeRozan, American basketball player 1990 – Josh Franceschi, English singer-songwriter 1991 – Luis Salom, Spanish motorcycle racer (d. 2016) 1991 – Mitchell te Vrede, Dutch footballer 1991 – Mike Trout, American baseball player 1992 – Adam Yates, English cyclist 1992 – Simon Yates, English cyclist 1992 – E. J. Tackett, American bowler 1993 – Martti Nõmme, Estonian ski jumper 1993 – Karol Zalewski, Polish sprinter 1997 – Matty Cash, Polish footballer 1997 – Kyler Murray, American football player 1998 – Vladimir Barbu, Italian diver 1998 – María Bazo, Peruvian windsurfer Deaths Pre-1600 461 – Majorian, Roman emperor (b. 420) 707 – Li Chongjun, Chinese prince 1028 – Alfonso V, king of León (b. 994) 1106 – Henry IV, Holy Roman Emperor (b. 1050) 1234 – Hugh Foliot, bishop of Hereford (b. c. 1155) 1272 – Richard Middleton, English Lord Chancellor 1296 – Heinrich II von Rotteneck, prince-bishop of Regensburg 1385 – Joan of Kent, mother of Richard II (b. 1328) 1485 – Alexander Stewart, duke of Albany (b. 1454) 1547 – Cajetan, Italian priest and saint (b. 1480) 1601–1900 1613 – Thomas Fleming, English judge and politician, Lord Chief Justice of England (b. 1544) 1616 – Vincenzo Scamozzi, Italian architect, designed Teatro Olimpico (b. 1548) 1632 – Robert de Vere, 19th Earl of Oxford, English soldier (b. 1575) 1635 – Friedrich Spee, German poet and academic (b. 1591) 1639 – Martin van den Hove, Dutch astronomer and mathematician (b. 1605) 1661 – Jin Shengtan, Chinese journalist and critic (b. 1608) 1787 – Francis Blackburne, English Anglican churchman and activist (b. 1705) 1817 – Pierre Samuel du Pont de Nemours, French economist and politician (b. 1739) 1834 – Joseph Marie Jacquard, French weaver and inventor, invented the Jacquard loom (b. 1752) 1848 – Jöns Jacob Berzelius, Swedish chemist and academic (b. 1779) 1855 – Mariano Arista, Mexican general and politician, 19th President of Mexico (b. 1802) 1864 – Li Xiucheng, Chinese field marshal (b. 1823) 1893 – Alfredo Catalani, Italian composer and academic (b. 1854) 1899 – Jacob Maris, Dutch painter and educator (b. 1837) 1900 – Wilhelm Liebknecht, German lawyer and politician (b. 1826) 1901–present 1912 – François-Alphonse Forel, Swiss limnologist and academic (b. 1841) 1917 – Edwin Harris Dunning, South African-English commander and pilot (b. 1891) 1938 – Konstantin Stanislavski, Russian actor and director (b. 1863) 1941 – Rabindranath Tagore, Indian author, poet, and playwright, Nobel Prize laureate (b. 1861) 1948 – Charles Bryant, English-American actor and director (b. 1879) 1953 – Abner Powell, American baseball player and manager (b. 1860) 1957 – Oliver Hardy, American actor, singer, and director (b. 1892) 1958 – Elizabeth Foreman Lewis, American author and educator (b. 1892) 1960 – Luis Ángel Firpo, Argentine boxer (b. 1894) 1963 – Ramon Vila Capdevila, last of the Spanish Maquis, holding out after the end of the Spanish Civil War (b.1908) 1968 – Giovanni Bracco, Italian race car driver (b. 1908) 1969 – Jean Bastien, French professional footballer (b. 1915) 1969 – Joseph Kosma, Hungarian-French composer (b. 1905) 1970 – Harold Haley, American lawyer and judge (b. 1904) 1970 – Jonathan P. Jackson, American bodyguard and kidnapper (b. 1953) 1972 – Joi Lansing, American model, actress, and singer (b. 1929) 1973 – Jack Gregory, Australian cricketer (b. 1895) 1974 – Rosario Castellanos, Mexican poet and author (b. 1925) 1974 – Sylvio Mantha, Canadian ice hockey player and coach (b. 1902) 1978 – Eddie Calvert, English trumpeter (b. 1922) 1981 – Gunnar Uusi, Estonian chess player (b. 1931) 1985 – Grayson Hall, American actress (b. 1922) 1987 – Camille Chamoun, Lebanese lawyer and politician, 7th President of Lebanon (b. 1900) 1989 – Mickey Leland, American lawyer and politician (b. 1944) 1994 – Larry Martyn, English actor (b. 1934) 1995 – Brigid Brophy, English author and critic (b. 1929) 2001 – Algirdas Lauritėnas, Lithuanian basketball player (b. 1932) 2003 – K. D. Arulpragasam, Sri Lankan zoologist and academic (b. 1931) 2003 – Mickey McDermott, American baseball player and coach (b. 1929) 2004 – Red Adair, American firefighter (b. 1915) 2004 – Colin Bibby, English ornithologist and academic (b. 1948) 2005 – Peter Jennings, Canadian-American journalist and author (b. 1938) 2006 – Mary Anderson Bain, American lawyer and politician (b. 1911) 2007 – Ernesto Alonso, Mexican actor, director, and producer (b. 1917) 2007 – Angus Tait, New Zealand businessman, founded Tait Communications (b. 1919) 2008 – Bernie Brillstein, American talent agent and producer (b. 1931) 2008 – Andrea Pininfarina, Italian engineer and businessman (b. 1957) 2009 – Louis E. Saavedra, American educator and politician, 48th Mayor of Albuquerque (b. 1933) 2009 – Mike Seeger, American singer-songwriter (b. 1933) 2010 – John Nelder, English mathematician and statistician (b. 1924) 2011 – Mark Hatfield, American soldier, academic, and politician, 29th Governor of Oregon (b. 1922) 2011 – Nancy Wake, New Zealand-English captain and spy (b. 1912) 2012 – Murtuz Alasgarov, Azerbaijani academic and politician, Speaker of the National Assembly of Azerbaijan (b. 1928) 2012 – Judith Crist, American critic and academic (b. 1922) 2012 – Vladimir Kobzev, Russian footballer and coach (b. 1959) 2012 – Anna Piaggi, Italian journalist and author (b. 1931) 2012 – Mayer Zald, American sociologist and academic (b. 1931) 2012 – Dušan Zbavitel, Czech indologist and author (b. 1925) 2013 – Samuel G. Armistead, American linguist, historian, and academic (b. 1927) 2013 – Almir Kayumov, Russian footballer (b. 1964) 2013 – Anthony Pawson, English-Canadian biologist, chemist, and academic (b. 1952) 2013 – Margaret Pellegrini, American actress and dancer (b. 1923) 2013 – Meeli Truu, Estonian architect (d. 1946) 2013 – Alexander Yagubkin, Russian boxer (b. 1961) 2014 – Víctor Fayad, Argentine lawyer and politician (b. 1955) 2014 – Perry Moss, American football player and coach (b. 1926) 2014 – Henry Stone, American record producer (b. 1921) 2015 – Manuel Contreras, Chilean general (b. 1929) 2015 – Frances Oldham Kelsey, Canadian pharmacologist and physician (b. 1914) 2015 – Louise Suggs, American golfer, co-founded LPGA (b. 1923) 2016 – Bryan Clauson, American racing driver (b. 1989) 2017 – Don Baylor, American baseball player (b. 1949) 2017 – David Maslanka, American composer (b. 1943) 2018 – M. Karunanidhi, Indian politician, former Tamil Nadu Chief Minister and prominent leader of Tamils (b. 1924) 2018 – Stan Mikita, Slovak hockey player (b. 1940) 2019 – David Berman, American musician, singer, poet and cartoonist (b. 1967) 2020 – Lê Khả Phiêu, Vietnamese politician (b. 1931) 2021 – Markie Post, American actress (b. 1950) 2022 - David McCullough, American historian and author (b. 1933) Holidays and observances Assyrian Martyrs Day (Assyrian community) Battle of Boyacá Day (Colombia) Christian feast day: Albert of Trapani Cajetan of Thienna Carpophorus and companions Dometius of Persia Donatus of Arezzo Donatus of Besançon Donatus of Muenstereifel John Mason Neale and Catherine Winkworth (Episcopal Church (USA)) Nantovinus Pope Sixtus II August 7 (Eastern Orthodox liturgics) Filseta (Ethiopian and Eritrean Orthodox Tewahedo Church) Emancipation Day (Saint Kitts and Nevis) Republic Day (Ivory Coast) Youth Day (Kiribati) National Purple Heart Day (United States) References External links Days of the year August

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https://en.wikipedia.org/wiki/August%208

August 8

Events Pre-1600 685 BC – Spring and Autumn period: Battle of Qianshi: Upon the death of the previous Duke of Qi, Gongsun Wuzhi, Duke Zhuang of Lu sends an army into the Duchy of Qi to install the exiled Qi prince Gongzi Jiu as the new Duke of Qi — but is defeated at Qianshi by Jiu’s brother and rival claimant, the newly inaugurated Duke Huan of Qi. 870 – Treaty of Meerssen: King Louis the German and his half-brother Charles the Bald partition the Middle Frankish Kingdom into two larger east and west divisions. 1220 – Sweden is defeated by Estonian tribes in the Battle of Lihula. 1264 – Mudéjar revolt: Muslim rebel forces took the Alcázar of Jerez de la Frontera after defeating the Castilian garrison. 1503 – King James IV of Scotland marries Margaret Tudor, daughter of King Henry VII of England at Holyrood Abbey in Edinburgh, Scotland. 1509 – Krishnadeva Raya is crowned Emperor of Vijayanagara at Chittoor. 1576 – The cornerstone for Tycho Brahe's Uraniborg observatory is laid on the island of Hven. 1585 – John Davis enters Cumberland Sound in search of the Northwest Passage. 1588 – Anglo-Spanish War: Battle of Gravelines: The naval engagement ends, ending the Spanish Armada's attempt to invade England. 1601–1900 1647 – The Irish Confederate Wars and Wars of the Three Kingdoms: Battle of Dungan's Hill: English Parliamentary forces defeat Irish forces. 1648 – Mehmed IV (1648–1687) succeeds Ibrahim I (1640–1648) as Ottoman sultan. 1709 – Bartolomeu de Gusmão demonstrates the lifting power of hot air in an audience before the king of Portugal in Lisbon, Portugal. 1786 – Mont Blanc on the French-Italian border is climbed for the first time by Jacques Balmat and Dr. Michel-Gabriel Paccard. 1794 – Joseph Whidbey leads an expedition to search for the Northwest Passage near Juneau, Alaska. 1831 – Four hundred Shawnee people agree to relinquish their lands in Ohio in exchange for land west of the Mississippi River in the Treaty of Wapakoneta. 1844 – The Quorum of the Twelve Apostles, headed by Brigham Young, is reaffirmed as the leading body of the Church of Jesus Christ of Latter-day Saints (LDS Church). 1863 – American Civil War: Following his defeat in the Battle of Gettysburg, General Robert E. Lee sends a letter of resignation to Confederate President Jefferson Davis (which is refused upon receipt). 1863 – Tennessee Military Governor Andrew Johnson frees his personal slaves in Greeneville, Tennessee despite them being exempt from the Emancipation Proclamation, now commemorated as Emancipation Day in the state. 1870 – The Republic of Ploiești, a failed Radical-Liberal rising against Domnitor Carol of Romania. 1876 – Thomas Edison receives a patent for his mimeograph. 1901–present 1903 – Black Saturday occurs, killing 12 in a stadium collapse in Philadelphia. 1908 – Wilbur Wright makes his first flight at a racecourse at Le Mans, France. It is the Wright Brothers' first public flight. 1918 – World War I: The Battle of Amiens begins a string of almost continuous Allied victories with a push through the German front lines (Hundred Days Offensive). 1919 – The Anglo-Afghan Treaty of 1919 is signed. It establishes peaceful relations between Afghanistan and the UK, and confirms the Durand line as the mutual border. In return, the UK is no longer obligated to subsidize the Afghan government. 1929 – The German airship Graf Zeppelin begins a round-the-world flight. 1940 – The "Aufbau Ost" directive is signed by Wilhelm Keitel. 1942 – Quit India Movement is launched in India against the British rule in response to Mohandas Gandhi's call for swaraj or complete independence. 1945 – The London Charter is signed by France, the United Kingdom, the Soviet Union and the United States, establishing the laws and procedures for the Nuremberg trials. 1946 – First flight of the Convair B-36, the world's first mass-produced nuclear weapon delivery vehicle, the heaviest mass-produced piston-engined aircraft, with the longest wingspan of any military aircraft, and the first bomber with intercontinental range. 1963 – Great Train Robbery: In England, a gang of 15 train robbers steal £2.6 million in bank notes. 1963 – The Zimbabwe African National Union (ZANU), the current ruling party of Zimbabwe, is formed by a split from the Zimbabwe African People's Union. 1967 – The Association of Southeast Asian Nations (ASEAN) is founded by Indonesia, Malaysia, the Philippines, Singapore and Thailand. 1969 – At a zebra crossing in London, photographer Iain Macmillan takes the iconic photo that becomes the cover image of the Beatles' album Abbey Road. 1973 – Kim Dae-jung, a South Korean politician and later president of South Korea, is kidnapped. 1974 – President Richard Nixon, in a nationwide television address, announces his resignation from the office of the President of the United States effective noon the next day. 1988 – The 8888 Uprising begins in Rangoon (Yangon), Burma (Myanmar). Led by students, hundreds of thousands join in nationwide protests against the one-party regime. On September 18, the demonstrations end in a military crackdown, killing thousands. 1988 – The first night baseball game in the history of Chicago's Wrigley Field (game was rained out in the fourth inning). 1989 – Space Shuttle program: STS-28 Mission: Space Shuttle Columbia takes off on a secret five-day military mission. 1990 – Iraq occupies Kuwait and the state is annexed to Iraq. This would lead to the Gulf War shortly afterward. 1991 – The Warsaw radio mast, then the tallest construction ever built, collapses. 1993 – The 7.8 Guam earthquake shakes the island with a maximum Mercalli intensity of IX (Violent), causing around $250 million in damage and injuring up to 71 people. 1998 – Iranian consulate in Mazar-i-Sharif, Afghanistan is raided by Taliban leading to the deaths of ten Iranian diplomats and a journalist. 2000 – Confederate submarine H.L. Hunley is raised to the surface after 136 years on the ocean floor and 30 years after its discovery by undersea explorer E. Lee Spence. 2001 – Albanian rebels ambush a convoy of the Army of the Republic of Macedonia near Tetovo, killing 10 soldiers. 2004 – A tour bus belonging to the Dave Matthews Band dumps approximately 800 pounds of human waste onto a boat full of passengers. 2007 – An EF2 tornado touches down in Kings County and Richmond County, New York, the most powerful tornado in New York to date and the first in Brooklyn since 1889. 2008 – A EuroCity express train en route from Kraków, Poland to Prague, Czech Republic strikes a part of a motorway bridge that had fallen onto the railroad track near Studénka railway station in the Czech Republic and derails, killing eight people and injuring 64 others. 2008 – The 29th modern summer Olympic Games took place in Beijing, China until August 24. 2010 – China Floods: A mudslide in Zhugqu County, Gansu, China, kills more than 1,400 people. 2013 – A suicide bombing at a funeral in the Pakistani city of Quetta kills at least 31 people. 2015 – Eight people are killed in a shooting in Harris County, Texas. 2016 – Terrorists attack a government hospital in Quetta, Pakistan with a suicide blast and shooting, killing between 70 and 94 people, and injuring around 130 others. 2022 – The Federal Bureau of Investigation (FBI) executes a raid on former president Donald Trump's residence in Mar-a-Lago, Palm Beach, Florida. Births Pre-1600 422 – Casper, ruler of the Maya city of Palenque 1079 – Emperor Horikawa of Japan (d. 1107) 1170 – Saint Dominic, founder of the Dominicans (d. 1221) 1306 – Rudolf II, Duke of Bavaria (d. 1353) 1492 – Matteo Tafuri, Italian alchemist (d. 1582) 1518 – Conrad Lycosthenes, French-German scholar and author (d. 1561) 1558 – George Clifford, 3rd Earl of Cumberland, English noble (d. 1605) 1601–1900 1605 – Cecil Calvert, 2nd Baron Baltimore, English lawyer and politician, Governor of Newfoundland (d. 1675) 1640 – Amalia Catharina, German poet and composer (d. 1697) 1646 – Godfrey Kneller, German-English painter (d. 1723) 1673 – John Ker, Scottish spy (d. 1726) 1693 – Laurent Belissen, French composer (d. 1762) 1694 – Francis Hutcheson, Irish philosopher and academic (d. 1746) 1709 – Hermann Anton Gelinek, German-Italian monk and violinist (d. 1779) 1720 – Carl Fredrik Pechlin, Swedish general and politician (d. 1796) 1754 – Hipólito Ruiz López, Spanish botanist (d. 1816) 1758 – Friedrich Georg Weitsch, German painter (d. 1828) 1790 – Ferenc Kölcsey, Hungarian poet, critic, and politician (d. 1838) 1807 – Emilie Flygare-Carlén, Swedish author (d. 1892) 1814 – Esther Hobart Morris, American suffragette and judge (d. 1902) 1822 – George Stoneman, Jr., United States Army cavalry officer (d. 1894) 1839 – Nelson A. Miles, American general (d. 1925) 1851 – George Turner, Australian politician, 18th Premier of Victoria (d. 1916) 1856 – Thomas Anstey Guthrie, English journalist and author (d. 1934) 1857 – Cécile Chaminade, French pianist and composer (d. 1944) 1863 – Jean Leon Gerome Ferris, American painter (d. 1930) 1866 – Matthew Henson, American explorer (d. 1955) 1874 – Albert Stanley, 1st Baron Ashfield, English businessman and politician, President of the Board of Trade (d. 1948) 1875 – Arthur Bernardes, Brazilian lawyer and politician, 12th President of Brazil (d. 1955) 1876 – Varghese Payyappilly Palakkappilly, Indian-Syrian priest, founded the Sisters of the Destitute (d. 1929) 1879 – Bob Smith, American physician and surgeon, co-founded Alcoholics Anonymous (d. 1950) 1879 – Emiliano Zapata, Mexican general and politician (d. 1919) 1880 – Earle Page, Australian lawyer, academic, and politician, 11th Prime Minister of Australia (d. 1961) 1881 – Paul Ludwig Ewald von Kleist, German field marshal (d. 1954) 1882 – Ladislas Starevich, Russian-French animator, screenwriter, and cinematographer (d. 1965) 1884 – Sara Teasdale, American poet and educator (d. 1933) 1889 – Hans Egede Budtz, Danish actor (d. 1968) 1889 – Jack Ryder, Australian cricketer (d. 1977) 1891 – Adolf Busch, German violinist and composer (d. 1952) 1896 – Marjorie Kinnan Rawlings, American author and academic (d. 1953) 1898 – Marguerite Bise, French chef (d. 1965) 1901–present 1901 – Ernest Lawrence, American physicist and academic, Nobel Prize laureate (d. 1958) 1902 – Paul Dirac, English-American physicist and academic, Nobel Prize laureate (d. 1984) 1904 – Achille Varzi, Italian racing driver (d. 1948) 1905 – André Jolivet, French composer (d. 1974) 1907 – Benny Carter, American saxophonist, trumpet player, and composer (d. 2003) 1908 – Arthur Goldberg, American jurist and politician, 6th United States Ambassador to the United Nations (d. 1990) 1909 – Charles Lyttelton, 10th Viscount Cobham, English cricketer and politician, 9th Governor-General of New Zealand (d. 1977) 1909 – Jack Renshaw, Australian politician, 31st Premier of New South Wales (d. 1987) 1909 – Bill Voce, England cricketer and coach (d. 1984) 1910 – Jimmy Murphy, Welsh-English footballer and manager (d. 1989) 1910 – Sylvia Sidney, American actress (d. 1999) 1911 – Rosetta LeNoire, American actress (d. 2002) 1915 – James Elliott, American runner and coach (d. 1981) 1919 – Dino De Laurentiis, Italian actor and producer (d. 2010) 1919 – John David Wilson, English animator and producer (d. 2013) 1920 – Leo Chiosso, Italian songwriter and producer (d. 2006) 1920 – Jimmy Witherspoon, American jump blues singer (d. 1997) 1921 – William Asher, American director, producer, and screenwriter (d. 2012) 1921 – Webb Pierce, American singer-songwriter and guitarist (d. 1991) 1921 – Esther Williams, American swimmer and actress (d. 2013) 1922 – Rory Calhoun, American actor (d. 1999) 1922 – Rudi Gernreich, Austrian-American fashion designer, created the Monokini (d. 1985) 1922 – Gertrude Himmelfarb, American historian, author, and academic (d. 2019) 1922 – Károly Reich, Hungarian illustrator (d. 1988) 1925 – Alija Izetbegović, Bosnian lawyer and politician, 1st President of Bosnia and Herzegovina (d. 2003) 1925 – Aziz Sattar, Malaysian actor, comedian, singer and director (d. 2014) 1926 – Richard Anderson, American actor and producer (d. 2017) 1927 – Johnny Temple, American baseball player and coach (d. 1994) 1927 – Maia Wojciechowska, Polish-American author (d. 2002) 1928 – Don Burrows, Australian saxophonist, clarinet player, and flute player (d. 2020) 1929 – Larisa Bogoraz, Russian linguist and activist (d. 2004) 1929 – Luis García Meza Tejada, Bolivian general and politician, 68th President of Bolivia (d. 2018) 1930 – Terry Nation, Welsh-American author and screenwriter (d. 1997) 1930 – Jerry Tarkanian, American basketball player and coach (d. 2015) 1931 – Roger Penrose, English physicist, mathematician, and philosopher, Nobel Prize laureate 1932 – Mel Tillis, American singer-songwriter and guitarist (d. 2017) 1933 – Joe Tex, American soul singer-songwriter (d. 1982) 1934 – Sarat Pujari, Indian actor, director, and screenwriter (d. 2014) 1935 – Donald P. Bellisario, American director, producer, and screenwriter 1935 – John Laws, Papua New Guinean-Australian singer and radio host 1936 – Frank Howard, American baseball player and manager 1936 – Jan Pieńkowski, Polish-English author and illustrator (d. 2022) 1937 – Dustin Hoffman, American actor and director 1937 – Sheila Varian, American horse breeder (d. 2016) 1937 – Cornelis Vreeswijk, Dutch-Swedish singer-songwriter, guitarist, and actor (d. 1987) 1938 – Jack Baldwin, English chemist and academic (d. 2020) 1938 – Jacques Hétu, Canadian composer and educator (d. 2010) 1938 – Connie Stevens, American actress and businesswoman 1939 – Jana Andrsová, Czech actress and ballerina 1939 – Viorica Viscopoleanu, Romanian long jumper 1939 – Alexander Watson, American diplomat, United States Ambassador to Peru 1940 – Dilip Sardesai, Indian cricketer (d. 2007) 1940 – Dennis Tito, American engineer and businessman, founded Wilshire Associates 1942 – James Blanchard, American diplomat and politician, 45th Governor of Michigan 1942 – Dennis Canavan, Scottish educator and politician 1942 – John Gustafson, English singer-songwriter and bass player (d. 2014) 1942 – Vardo Rumessen, Estonian pianist and musicologist (d. 2015) 1944 – John C. Holmes, American film actor (d. 1988) 1944 – Michael Johnson, American singer-songwriter, guitarist, and producer (d. 2017) 1944 – John Renbourn, English-Scottish guitarist and songwriter (d. 2015) 1944 – Simon Taylor, English journalist and author 1946 – Joe Bethancourt, American singer-songwriter (d. 2014) 1947 – Ken Dryden, Canadian ice hockey player, lawyer, and politician 1947 – Larry Wilcox, American actor, director, and producer 1948 – Svetlana Savitskaya, Russian engineer and astronaut 1948 – Margaret Urban Walker, American philosopher 1949 – Terry Burnham, American actress 1949 – Keith Carradine, American actor 1949 – Ricardo Londoño, Colombian racing driver (d. 2009) 1950 – Willie Hall, American drummer and producer 1950 – Ken Kutaragi, Japanese businessman, created PlayStation 1951 – Martin Brest, American director, producer, and screenwriter 1951 – Phil Carlson, Australian cricketer (d. 2022) 1951 – Mohamed Morsi, Egyptian engineer, academic, and politician, 5th President of Egypt (d. 2019) 1951 – Mamoru Oshii, Japanese director, producer, and screenwriter 1951 – Randy Shilts, American journalist and author (d. 1994) 1951 – Louis van Gaal, Dutch footballer and manager 1952 – Anton Fig, South African-American drummer 1952 – Jostein Gaarder, Norwegian author 1952 – Doug Melvin, Canadian baseball player and manager 1952 – Robin Quivers, American nurse, radio host/personality, and author 1952 – Sudhakar Rao, Indian cricketer 1953 – Nigel Mansell, English racing driver 1954 – Nick Holtam, English bishop 1955 – Diddú, Icelandic singer-songwriter 1955 – Herbert Prohaska, Austrian footballer and manager 1955 – Michael Roe, Irish racing driver 1956 – Chris Foreman, English singer-songwriter and guitarist 1956 – David Grant, English singer 1956 – Cecilia Roth, Argentinian actress 1957 – Dennis Drew, American keyboard player 1958 – Deborah Norville, American journalist 1959 – Caroline Ansink, Dutch flute player, composer, and educator 1960 – Mustafa Balbay, Turkish journalist and politician 1960 – Ulrich Maly, German politician, 16th Mayor of Nuremberg 1961 – The Edge, British-Irish musician, singer and songwriter 1961 – Daniel House, American bass player and producer 1961 – Ron Klain, American lawyer and politician, White House Chief of Staff 1961 – Bruce Matthews, American football player and coach 1961 – Rikki Rockett, American glam rock drummer 1962 – Kool Moe Dee, American musician, singer and actor 1963 – Hur Jin-ho, South Korean director and screenwriter 1963 – Ron Karkovice, American baseball player and manager 1963 – Emi Shinohara, Japanese voice actress and singer 1963 – Jon Turteltaub, American director and producer 1963 – Stephen Walkom, Canadian ice hockey player, referee, and manager 1964 – Anastasia M. Ashman, American blogger and author 1964 – Giuseppe Conte, Prime Minister of Italy 1964 – Scott Sandelin, American ice hockey player and coach 1964 – Paul Taylor, English cricketer 1965 – Angus Fraser, English cricketer, manager, and journalist 1965 – Kate Langbroek, Australian talk show host 1966 – Chris Eubank, English boxer 1966 – John Hudek, American baseball player and coach 1967 – Marcelo Balboa, American soccer player, coach, and sportscaster 1968 – Yvie Burnett, Scottish soprano 1968 – Aldo Calderón van Dyke, Honduran journalist (d. 2013) 1968 – Abey Kuruvilla, Indian cricketer and coach 1968 – Huey Morgan, American singer-songwriter and guitarist 1969 – Monika Tsõganova, Estonian chess player 1969 – Faye Wong, Chinese singer-songwriter and actress 1970 – Trev Alberts, American football player and journalist 1970 – Ben G. Davis, English chemist and academic 1970 – José Francisco Molina, Spanish footballer and manager 1970 – Chester Williams, South African rugby player and coach (d. 2019) 1971 – Johnny Balentina, Dutch baseball player 1972 – Joely Collins, Canadian actress and producer 1972 – Andrea de Rossi, Italian rugby player and coach 1972 – Axel Merckx, Belgian cyclist 1972 – Steven Tweed, Scottish footballer and manager 1973 – Shane Lee, Australian cricketer and guitarist 1973 – Gert Olesk, Estonian footballer and manager 1973 – Scott Stapp, American singer-songwriter and producer 1973 – Mark Wills, American singer-songwriter 1973 – Ilka Agricola, German mathematician 1974 – Manjul Bhargava, Canadian-American mathematician and academic 1974 – Scott D'Amore, Canadian wrestler and manager 1974 – Brian Harvey, English singer-songwriter 1974 – Andy Priaulx, Guernseyan racing driver 1975 – Mick Moss, English singer-songwriter 1976 – JC Chasez, American singer and dancer 1976 – Drew Lachey, American singer and actor 1977 – Lindsay Sloane, American actress 1977 – Darren Manzella, American sergeant (d. 2013) 1977 – Rocky Thompson, Canadian ice hockey player and coach 1977 – Nicolas Vogondy, French cyclist 1977 – Mohammad Wasim, Pakistani cricketer 1978 – Alan Maybury, Irish footballer and coach 1978 – Louis Saha, French footballer 1978 – Miho Shiraishi, Japanese actress 1979 – Richard Harwood, English cellist 1979 – Rashard Lewis, American basketball player 1979 – Richard Lyons, Northern Irish racing driver 1980 – Craig Breslow, American baseball player 1980 – Jack Cassel, American baseball player 1980 – Denisse Guerrero, Mexican singer-songwriter 1980 – Mike Hindert, American singer and bass player 1980 – Sabine Klaschka, German tennis player 1980 – Diego Markwell, Dutch baseball player 1980 – Pat Noonan, American soccer player 1980 – Michael Urie, American actor, director, and producer 1981 – Vanessa Amorosi, Australian singer-songwriter 1981 – Roger Federer, Swiss tennis player 1981 – Meagan Good, American actress and producer 1981 – Harel Skaat, Israeli singer-songwriter 1982 – David Florence, English canoe racer 1982 – Ross Ohlendorf, American baseball player 1983 – Guy Burnet, English actor and producer 1983 – Willie Tonga, Australian rugby league player 1984 – Kirk Broadfoot, Scottish footballer 1984 – Norbert Michelisz, Hungarian racing driver 1984 – Martrez Milner, American football player 1985 – Toby Flood, English rugby player 1985 – Ryan Koolwijk, Dutch footballer 1985 – James Morgan, Welsh actor and producer 1985 – Brett Ratliff, American football player 1985 – Anita Włodarczyk, Polish track and field athlete 1986 – Kateryna Bondarenko, Ukrainian tennis player 1986 – Pierre Garçon, American football player 1986 – Chris Pressley, American football player 1987 – Pierre Boulanger, French actor 1987 – Katie Leung, Scottish actress 1987 – Tatjana Maria, German tennis player 1988 – Princess Beatrice, Mrs Edoardo Mapelli Mozzi, British Princess 1988 – Danilo Gallinari, Italian basketball player 1988 – Rinku Singh, Indian baseball player 1988 – Laura Slade Wiggins, American actress and singer 1989 – Ken Baumann, American actor and author 1989 – Anthony Rizzo, American baseball player 1989 – Hannah Miley, English-Scottish swimmer 1989 – Prajakta Mali, Indian actress 1990 – Vladimír Darida, Czech footballer 1990 – Parker Kligerman, American race car driver 1990 – Aleksandra Szwed, Polish actress and singer 1990 – Kane Williamson, New Zealand cricket captain 1991 – Nélson Oliveira, Portuguese footballer 1991 – Tyrone Peachey, Australian rugby league player 1992 – Josip Drmić, Swiss footballer 1992 – Casey Cott, American actor 1998 – Shawn Mendes, Canadian singer-songwriter and guitarist 1998 – Ryan Garcia, American boxer 2000 – Félix Auger-Aliassime, Canadian tennis player Deaths Pre-1600 117 – Trajan, Roman emperor (b. 53) 753 – Hildegar, bishop of Cologne 869 – Lothair II, Frankish king (b. 835) 998 – Seo Hui, Korean politician and diplomat (b. 942) 1002 – Almanzor, chief minister and de facto ruler of Córdoba 1171 – Henry of Blois, bishop of Winchester (b. 1111) 1303 – Henry of Castile the Senator, Spanish nobleman (b. 1230) 1533 – Lucas van Leyden, Dutch artist (b. 1494) 1555 – Oronce Finé, French mathematician and cartographer (b. 1494) 1588 – Alonso Sánchez Coello, Spanish painter (b. 1532) 1601–1900 1604 – Horio Tadauji, Japanese daimyō (b. 1578) 1616 – Cornelis Ketel, Dutch painter (b. 1548) 1631 – Konstantinas Sirvydas, Lithuanian priest, lexicographer, and academic (b. 1579) 1684 – George Booth, 1st Baron Delamer, English politician (b. 1622) 1724 – Christoph Ludwig Agricola, German painter (b. 1665) 1747 – Madeleine de Verchères, Canadian raid leader (b. 1678) 1746 – Francis Hutcheson, Irish philosopher (b. 1694) 1759 – Carl Heinrich Graun, German tenor and composer (b. 1704) 1827 – George Canning, English lawyer and politician, Prime Minister of the United Kingdom (b. 1770) 1828 – Carl Peter Thunberg, Swedish botanist and psychologist (b. 1743) 1858 – Marie-Claire Heureuse Félicité Bonheur, Haitian Empress (b. 1758) 1863 – Angus MacAskill, Scottish-Canadian giant (b. 1825) 1879 – Immanuel Hermann Fichte, German philosopher and academic (b. 1797) 1887 – Alexander William Doniphan, American colonel, lawyer, and politician (b. 1808) 1897 – Jacob Burckhardt, Swiss historian and academic (b. 1818) 1898 – Eugène Boudin, French painter (b. 1824) 1901–present 1902 – James Tissot, French painter and illustrator (b. 1836) 1902 – John Henry Twachtman, American painter and academic (b. 1853) 1909 – Mary MacKillop, Australian nun and saint, co-founded the Sisters of St Joseph of the Sacred Heart (b. 1842) 1911 – William P. Frye, American lawyer and politician (b. 1830) 1920 – Eduard Birnbaum, Polish-born German cantor (b. 1855) 1921 – Juhani Aho, Finnish journalist and author (b. 1861) 1928 – Stjepan Radić, Croatian politician (b. 1871) 1930 – Launceston Elliot, Scottish wrestler and weightlifter (b. 1874) 1934 – Wilbert Robinson, American baseball player, coach, and manager (b. 1863) 1937 – Jimmie Guthrie, Scottish motorcycle racer (b. 1897) 1940 – Johnny Dodds, American clarinet player and saxophonist (b. 1892) 1944 – Erwin von Witzleben, German field marshal (b. 1881) 1944 – Michael Wittmann, German commander (b. 1914) 1950 – Fergus McMaster, Australian businessman, founded Qantas (b. 1879) 1959 – Albert Namatjira, Australian painter (b. 1902) 1965 – Shirley Jackson, American novelist and short story writer (b. 1916) 1969 – Otmar Freiherr von Verschuer, German biologist and eugenicist (b. 1896) 1971 – Freddie Spencer Chapman, English lieutenant (b. 1907) 1973 – Vilhelm Moberg, Swedish historian and author (b. 1898) 1974 – Elisabeth Abegg, German anti-Nazi resistance fighter (b. 1882) 1975 – Cannonball Adderley, American saxophonist (b. 1928) 1979 – Nicholas Monsarrat, English lieutenant and author (b. 1910) 1980 – Paul Triquet, Canadian general, Victoria Cross recipient (b. 1910) 1981 – Thomas McElwee, Irish republican and PIRA volunteer (b. 1957) 1982 – Eric Brandon, English racing driver and businessman (b. 1920) 1984 – Richard Deacon, American actor (b. 1921) 1984 – Ellen Raskin, American author and illustrator (b. 1928) 1985 – Louise Brooks, American actress (b. 1906) 1987 – Danilo Blanuša, Croatian mathematician and physicist (b. 1903) 1988 – Félix Leclerc, Canadian singer-songwriter and guitarist (b. 1914) 1988 – Alan Napier, English actor (b. 1903) 1991 – James Irwin, American colonel, pilot, and astronaut (b. 1930) 1992 – Abu al-Qasim al-Khoei, Iranian religious leader and scholar (b. 1899) 1996 – Nevill Francis Mott, English physicist and academic, Nobel Prize laureate (b. 1905) 1996 – Jüri Randviir, Estonian chess player and journalist (b. 1927) 1998 – Mahmoud Saremi, Iranian journalist (b. 1968) 2003 – Dirk Hoogendam, Dutch-German SS officer (b. 1922) 2003 – Falaba Issa Traoré, Malian director and playwright (b. 1930) 2004 – Leon Golub, American painter and academic (b. 1922) 2004 – Fay Wray, Canadian-American actress (b. 1907) 2005 – Barbara Bel Geddes, American actress (b. 1922) 2005 – Ahmed Deedat, South African missionary and author (b. 1918) 2005 – John H. Johnson, American publisher, founded the Johnson Publishing Company (b. 1918) 2005 – Gene Mauch, American baseball player and manager (b. 1925) 2005 – Dean Rockwell, American commander, wrestler, and coach (b. 1912) 2005 – Monica Sjöö, Swedish-English painter (b. 1938) 2007 – Ma Lik, Chinese journalist and politician (b. 1952) 2007 – Melville Shavelson, American director, producer, and screenwriter (b. 1917) 2008 – Orville Moody, American golfer (b. 1933) 2009 – Daniel Jarque, Spanish footballer (b. 1983) 2010 – Patricia Neal, American actress (b. 1926) 2012 – Fay Ajzenberg-Selove, German-American physicist and academic (b. 1926) 2012 – Ruth Etchells, English poet and academic (b. 1931) 2012 – Surya Lesmana, Indonesian footballer and manager (b. 1944) 2012 – Kurt Maetzig, German director and screenwriter (b. 1911) 2013 – Karen Black, American actress (b. 1939) 2013 – Johannes Bluyssen, Dutch bishop (b. 1926) 2013 – Fernando Castro Pacheco, Mexican painter, engraver, and illustrator (b. 1918) 2013 – Igor Kurnosov, Russian chess player (b. 1985) 2013 – Regina Resnik, American soprano and actress (b. 1922) 2014 – Menahem Golan, Israeli director and producer (b. 1929) 2014 – Charles Keating, English-American actor (b. 1941) 2014 – Leonardo Legaspi, Filipino archbishop (b. 1935) 2014 – Peter Sculthorpe, Australian composer and conductor (b. 1929) 2014 – Red Wilson, American football and baseball player (b. 1929) 2015 – Sean Price, American rapper (b. 1972) 2015 – Gus Mortson, Canadian ice hockey player and coach (b. 1925) 2017 – Glen Campbell, American singer-songwriter, guitarist, and actor (b. 1936) 2018 – Nicholas Bett, Kenyan track and field athlete (b. 1990) 2020 – Gabriel Ochoa Uribe, Colombian football player and manager (b. 1929) 2020 – Alfredo Lim, former Philippine senator and Mayor of Manila (b. 1929) 2021 – Bill Davis, Canadian politician, 18th premier of Ontario (b. 1929) 2022 – Olivia Newton-John, English-Australian singer-songwriter and actress (b. 1948) Holidays and observances Ceasefire Day (end of Iran–Iraq War) (Iraqi Kurdistan) Christian Feast Day: Altmann of Passau Cyriacus Dominic de Guzmán, founder of the Dominican Order. Four Crowned Martyrs Largus Mary MacKillop Saint Smaragdus (and companions) Severus of Vienne August 8 (Eastern Orthodox liturgics) Father's Day or Bā bā Day (爸爸節), Bā Bā is Mandarin for "father" and "8-8", or August 8. (Mongolia, Taiwan) Happiness Happens Day International Cat Day Namesday of the Queen (Sweden) Nane Nane Day (Tanzania) Signal Troops Day (Ukraine) References External links Days of the year August

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https://en.wikipedia.org/wiki/April%2016

April 16

Events Pre-1600 1457 BC – Battle of Megido - the first battle to have been recorded in what is accepted as relatively reliable detail. 69 – Defeated by Vitellius' troops at Bedriacum, Otho commits suicide. 73 – Masada, a Jewish fortress, falls to the Romans after several months of siege, ending the First Jewish–Roman War. 1346 – Stefan Dušan, "the Mighty", is crowned Emperor of the Serbs at Skopje, his empire occupying much of the Balkans. 1520 – The Revolt of the Comuneros begins in Spain against the rule of Charles V. 1582 – Spanish conquistador Hernando de Lerma founds the settlement of Salta, Argentina. 1601–1900 1746 – The Battle of Culloden is fought between the French-supported Jacobites and the British Hanoverian forces commanded by William Augustus, Duke of Cumberland, in Scotland. After the battle many highland traditions were banned and the Highlands of Scotland were cleared of inhabitants. 1780 – Franz Friedrich Wilhelm von Fürstenberg founds the University of Münster. 1799 – French Revolutionary Wars: The Battle of Mount Tabor: Napoleon drives Ottoman Turks across the River Jordan near Acre. 1818 – The United States Senate ratifies the Rush–Bagot Treaty, limiting naval armaments on the Great Lakes and Lake Champlain. 1838 – The French Army captures Veracruz in the Pastry War. 1847 – Shooting of a Māori by an English sailor results in the opening of the Wanganui Campaign of the New Zealand Wars. 1853 – The Great Indian Peninsula Railway opens the first passenger rail in India, from Bori Bunder to Thane. 1858 – The Wernerian Natural History Society, a former Scottish learned society, is dissolved. 1862 – American Civil War: Battle at Lee's Mills in Virginia. 1862 – American Civil War: The District of Columbia Compensated Emancipation Act, a bill ending slavery in the District of Columbia, becomes law. 1863 – American Civil War: During the Vicksburg Campaign, gunboats commanded by acting Rear Admiral David Dixon Porter run downriver past Confederate artillery batteries at Vicksburg. 1878 – The Senate of the Grand Duchy of Finland issued a declaration establishing a city of Kotka on the southern part islands from the old Kymi parish. 1881 – In Dodge City, Kansas, Bat Masterson fights his last gun battle. 1901–present 1908 – Natural Bridges National Monument is established in Utah. 1910 – The oldest existing indoor ice hockey arena still used for the sport in the 21st century, Boston Arena, opens for the first time. 1912 – Harriet Quimby becomes the first woman to fly an airplane across the English Channel. 1917 – Russian Revolution: Vladimir Lenin returns to Petrograd, Russia, from exile in Switzerland. 1919 – Mohandas Gandhi organizes a day of "prayer and fasting" in response to the killing of Indian protesters in the Jallianwala Bagh massacre by the British colonial troops three days earlier. 1919 – Polish–Lithuanian War: The Polish Army launches the Vilna offensive to capture Vilnius in modern Lithuania. 1922 – The Treaty of Rapallo, pursuant to which Germany and the Soviet Union re-establish diplomatic relations, is signed. 1925 – During the Communist St Nedelya Church assault in Sofia, Bulgaria, 150 are killed and 500 are wounded. 1941 – World War II: The Italian-German Tarigo convoy is attacked and destroyed by British ships. 1941 – World War II: The Nazi-affiliated Ustaše is put in charge of the Independent State of Croatia by the Axis powers after Operation 25 is effected. 1942 – King George VI awarded the George Cross to the people of Malta in appreciation of their heroism. 1943 – Albert Hofmann accidentally discovers the hallucinogenic effects of the research drug LSD. He intentionally takes the drug three days later on April 19. 1944 – World War II: Allied forces start bombing Belgrade, killing about 1,100 people. This bombing fell on the Orthodox Christian Easter. 1945 – World War II: The Red Army begins the final assault on German forces around Berlin, with nearly one million troops fighting in the Battle of the Seelow Heights. 1945 – The United States Army liberates Nazi Sonderlager (high security) prisoner-of-war camp Oflag IV-C (better known as Colditz). 1945 – More than 7,000 die when the German transport ship Goya is sunk by a Soviet submarine. 1947 – An explosion on board a freighter in port causes the city of Texas City, Texas, to catch fire, killing almost 600. 1947 – Bernard Baruch first applies the term "Cold War" to describe the relationship between the United States and the Soviet Union. 1948 – The Organization of European Economic Co-operation is formed. 1961 – In a nationally broadcast speech, Cuban leader Fidel Castro declares that he is a Marxist–Leninist and that Cuba is going to adopt Communism. 1963 – Dr. Martin Luther King Jr. pens his Letter from Birmingham Jail while incarcerated in Birmingham, Alabama for protesting against segregation. 1972 – Apollo program: The launch of Apollo 16 from Cape Canaveral, Florida. 1990 – "Doctor Death", Jack Kevorkian, participates in his first assisted suicide. 1996 – Israel strikes a civilian house in Nabatieh Fawka, Lebanon, killing nine people, including seven children. 2001 – India and Bangladesh begin a five-day border conflict, but are unable to resolve the disputes about their border. 2003 – The Treaty of Accession is signed in Athens admitting ten new member states to the European Union. 2003 – Michael Jordan plays his final game with the National Basketball Association. 2007 – Virginia Tech shooting: Seung-Hui Cho guns down 32 people and injures 17 before committing suicide. 2008 – The U.S. Supreme Court rules in the Baze v. Rees decision that execution by lethal injection does not violate the Eighth Amendment ban against cruel and unusual punishment. 2012 – The trial for Anders Behring Breivik, the perpetrator of the 2011 Norway attacks, begins in Oslo, Norway. 2012 – The Pulitzer Prize winners were announced, it was the first time since 1977 that no book won the Fiction Prize. 2013 – A 7.8-magnitude earthquake strikes Sistan and Baluchestan Province, Iran, killing at least 35 people and injuring 117 others. 2013 – The 2013 Baga massacre is started when Boko Haram militants engage government soldiers in Baga. 2014 – The South Korean ferry MV Sewol capsizes and sinks near Jindo Island, killing 304 passengers and crew and leading to widespread criticism of the South Korean government, media, and shipping authorities. 2016 – Ecuador's worst earthquake in nearly 40 years kills 676 and injures 6,274. 2018 – The New York Times and the New Yorker win the Pulitzer Prize for Public Service for breaking news of the Harvey Weinstein sexual abuse scandal. Births Pre-1600 1488 – Jungjong of Joseon (d. 1544) 1495 – Petrus Apianus, German mathematician and astronomer (d. 1557) 1516 – Tabinshwehti, Burmese king (d. 1550) 1569 – John Davies, English poet and lawyer (d. 1626) 1601–1900 1635 – Frans van Mieris the Elder, Dutch painter (d. 1681) 1646 – Jules Hardouin-Mansart, French architect, designed the Château de Dampierre and Grand Trianon (probable; d. 1708) 1660 – Hans Sloane, Irish-English physician and academic (d. 1753) 1661 – Charles Montagu, 1st Earl of Halifax, English poet and politician, First Lord of the Treasury (d. 1715) 1682 – John Hadley, English mathematician, invented the octant (d. 1744) 1697 – Johann Gottlieb Görner, German organist and composer (d. 1778) 1728 – Joseph Black, French-Scottish physician and chemist (d. 1799) 1730 – Henry Clinton, English general and politician (d. 1795) 1755 – Louise Élisabeth Vigée Le Brun, French painter (d. 1842) 1786 – John Franklin, English admiral and politician, fourth Lieutenant Governor of Van Diemen's Land (d. 1847) 1800 – George Bingham, 3rd Earl of Lucan, English field marshal and politician (d. 1888) 1808 – Caleb Blood Smith, American journalist, lawyer, and politician, sixth United States Secretary of the Interior (d. 1864) 1821 – Ford Madox Brown, French-English soldier and painter (d. 1893) 1823 – Gotthold Eisenstein, German mathematician and academic (d. 1852) 1826 – Sir James Corry, 1st Baronet, British politician (d. 1891) 1827 – Octave Crémazie, Canadian poet and bookseller (d. 1879) 1839 – Antonio Starabba, Marchese di Rudinì, Italian politician, 12th Prime Minister of Italy (d. 1908) 1834 – Charles Lennox Richardson, English merchant (d. 1862) 1844 – Anatole France, French journalist, novelist, and poet, Nobel Prize laureate (d. 1924) 1847 – Hans Auer, Swiss-Austrian architect, designed the Federal Palace of Switzerland (d. 1906) 1848 – Kandukuri Veeresalingam, Indian author and activist (d. 1919) 1851 – Ponnambalam Ramanathan, Sri Lankan lawyer and politician, third Solicitor General of Sri Lanka (d. 1930) 1864 – Rose Talbot Bullard, American medical doctor and professor (d. 1915) 1865 – Harry Chauvel, Australian general (d. 1945) 1866 – José de Diego, Puerto Rican journalist, lawyer, and politician (d. 1918) 1867 – Wilbur Wright, American inventor (d. 1912) 1871 – John Millington Synge, Irish author, poet, and playwright (d. 1909) 1874 – Jōtarō Watanabe, Japanese general (d. 1936) 1878 – R. E. Foster, English cricketer and footballer (d. 1914) 1882 – Seth Bingham, American organist and composer (d. 1972) 1884 – Ronald Barnes, 3rd Baron Gorell, English cricketer, journalist, and politician (d. 1963) 1885 – Leó Weiner, Hungarian composer and educator (d. 1960) 1886 – Michalis Dorizas, Greek-American football player and javelin thrower (d. 1957) 1886 – Ernst Thälmann, German politician (d. 1944) 1888 – Billy Minter, English footballer and manager (d. 1940) 1889 – Charlie Chaplin, English actor, director, producer, screenwriter, and composer (d. 1977) 1890 – Fred Root, English cricketer and umpire (d. 1954) 1890 – Gertrude Chandler Warner, American author and educator (d. 1979) 1891 – Dorothy P. Lathrop, American author and illustrator (d. 1980) 1892 – Howard Mumford Jones, American author, critic, and academic (d. 1980) 1893 – Germaine Guèvremont, Canadian journalist and author (d. 1968) 1893 – John Norton, American hurdler (d. 1979) 1895 – Ove Arup, English-Danish engineer and businessman, founded Arup (d. 1988) 1896 – Robert Henry Best, American journalist (d. 1952) 1896 – Árpád Weisz, Hungarian footballer (d. 1944) 1899 – Osman Achmatowicz, Polish chemist and academic (d. 1988) 1900 – Polly Adler, Russian-American madam and author (d. 1962) 1901–present 1903 – Paul Waner, American baseball player and manager (d. 1965) 1904 – Fifi D'Orsay, Canadian-American vaudevillian, actress, and singer (d. 1983) 1905 – Frits Philips, Dutch businessman (d. 2005) 1907 – Joseph-Armand Bombardier, Canadian inventor and businessman, founded Bombardier Inc. (d. 1964) 1907 – August Eigruber, Austrian-German politician (d. 1947) 1908 – Ellis Marsalis, Sr., American businessman and activist (d. 2004) 1908 – Ray Ventura, French jazz bandleader (d. 1979) 1910 – Berton Roueché, American journalist and author (d. 1994) 1911 – Guy Burgess, English-Russian spy (d. 1963) 1913 – Les Tremayne, English actor (d. 2003) 1914 – John Hodiak, American actor (d. 1955) 1915 – Robert Speck, Canadian politician, first Mayor of Mississauga (d. 1972) 1916 – Behçet Necatigil, Turkish author, poet, and translator (d. 1979) 1917 – Victoria Eugenia Fernández de Córdoba, 18th Duchess of Medinaceli (d. 2013) 1917 – Barry Nelson, American actor (d. 2007) 1918 – Dick Gibson, English racing driver (d. 2010) 1918 – Hsuan Hua, Chinese-American monk and author (d. 1995) 1918 – Juozas Kazickas, Lithuanian-American businessman and philanthropist (d. 2014) 1918 – Spike Milligan, Irish actor, comedian, and writer (d. 2002) 1919 – Merce Cunningham, American dancer and choreographer (d. 2009) 1919 – Nilla Pizzi, Italian singer (d. 2011) 1919 – Pedro Ramírez Vázquez, Mexican architect, designed the Tijuana Cultural Center and National Museum of Anthropology (d. 2013) 1919 – Thomas Willmore, English geometer and academic (d. 2005) 1920 – Ananda Dassanayake, Sri Lankan politician (d. 2012) 1920 – Prince George Valdemar of Denmark (d. 1986) 1921 – Arlin Adams, American lawyer and judge (d. 2015) 1921 – Wolfgang Leonhard, German historian and author (d. 2014) 1921 – Peter Ustinov, English actor, director, producer, and screenwriter (d. 2004) 1922 – Kingsley Amis, English novelist, poet, and critic (d. 1995) 1922 – John Christopher, English author (d. 2012) 1922 – Lawrence N. Guarino, American colonel (d. 2014) 1922 – Leo Tindemans, Belgian politician, 43rd Prime Minister of Belgium (d. 2014) 1923 – Warren Barker, American composer (d. 2006) 1923 – Arch A. Moore Jr., American sergeant, lawyer, and politician, 28th Governor of West Virginia (d. 2015) 1924 – John Harvey-Jones, English academic and businessman (d. 2008) 1924 – Henry Mancini, American composer and conductor (d. 1994) 1924 – Rudy Pompilli, American saxophonist (d. 1976) 1924 – Madanjeet Singh, Indian diplomat, author, and philanthropist (d. 2013) 1926 – Pierre Fabre, French pharmacist, founded Laboratoires Pierre Fabre (d. 2013) 1927 – Edie Adams, American actress and singer (d. 2008) 1927 – Pope Benedict XVI (d. 2022) 1927 – Rolf Schult, German actor (d. 2013) 1929 – Roy Hamilton, American singer (d. 1969) 1929 – Ralph Slatyer, Australian biologist and ecologist (d. 2012) 1929 – Ed Townsend, American singer-songwriter and producer (d. 2003) 1930 – Doug Beasy, Australian footballer and educator (d. 2013) 1930 – Herbie Mann, American flute player and composer (d. 2003) 1932 – Maury Meyers, American lawyer and politician (d. 2014) 1933 – Marcos Alonso Imaz, Spanish footballer (d. 2012) 1933 – Joan Bakewell, English journalist and author 1933 – Perry Botkin Jr., American composer, arranger and musician (d. 2021) 1933 – Vera Krepkina, Russian long jumper 1933 – Ike Pappas, American journalist and actor (d. 2008) 1934 – Vince Hill, English singer-songwriter 1934 – Robert Stigwood, Australian producer and manager (d. 2016) 1934 – Barrie Unsworth, Australian politician, 36th Premier of New South Wales 1934 – Vicar, Chilean cartoonist (d. 2012) 1935 – Marcel Carrière, Canadian director and screenwriter 1935 – Sarah Kirsch, German poet and author (d. 2013) 1935 – Lennart Risberg, Swedish boxer (d. 2013) 1935 – Dominique Venner, French journalist and historian (d. 2013) 1935 – Bobby Vinton, American singer 1936 – Vadim Kuzmin, Russian physicist and academic (d. 2015) 1937 – Gert Potgieter, South African hurdler and coach 1938 – Rich Rollins, American baseball player 1938 – Gordon Wilson, Scottish lawyer and politician (d. 2017) 1939 – John Amabile, American football player and coach (d. 2012) 1939 – Dusty Springfield, English singer and record producer (d. 1999) 1940 – Benoît Bouchard, Canadian academic and politician, 18th Canadian Minister of Transport 1940 – David Holford, Barbadian cricketer 1940 – Queen Margrethe II of Denmark 1940 – Joan Snyder, American painter 1940 – Thomas Stonor, 7th Baron Camoys, English banker and politician, Lord Chamberlain of the United Kingdom 1941 – Allan Segal, American director and producer (d. 2012) 1942 – Jim Lonborg, American baseball pitcher 1942 – Sir Frank Williams, English businessman, founded the Williams F1 Racing Team (d. 2021) 1943 – Lonesome Dave Peverett, English singer-songwriter and guitarist (d. 2000) 1943 – Petro Tyschtschenko, Austrian-German businessman 1943 – John Watkins, Australian cricketer 1945 – Tom Allen, American lawyer and politician 1946 – Margot Adler, American journalist and author (d. 2014) 1946 – Ernst Bakker, Dutch politician (d. 2014) 1946 – Johnnie Lewis, Liberian lawyer and politician, 18th Chief Justice of Liberia (d. 2015) 1946 – R. Carlos Nakai, American flute player 1947 – Kareem Abdul-Jabbar, American basketball player and coach 1947 – Gerry Rafferty, Scottish singer-songwriter (d. 2011) 1948 – Reg Alcock, Canadian businessman and politician, 17th Canadian President of the Treasury Board (d. 2011) 1950 – David Graf, American actor (d. 2001) 1950 – Colleen Hewett, Australian singer and actress 1951 – Ioan Mihai Cochinescu, Romanian author and photographer 1952 – Bill Belichick, American football player and coach 1952 – Michel Blanc, French actor and director 1952 – Esther Roth-Shahamorov, Israeli sprinter and hurdler 1952 – Billy West, American voice actor, singer-songwriter, and comedian 1953 – Peter Garrett, Australian singer-songwriter and politician 1953 – Jay O. Sanders, American actor 1954 – Ellen Barkin, American actress 1954 – John Bowe, Australian racing driver 1954 – Mike Zuke, Canadian ice hockey player 1955 – Bruce Bochy, American baseball player and manager 1955 – Henri, Grand Duke of Luxembourg 1956 – David M. Brown, American captain, pilot, and astronaut (d. 2003) 1956 – T Lavitz, American keyboard player, composer, and producer (d. 2010) 1956 – Lise-Marie Morerod, Swiss skier 1957 – Patricia De Martelaere, Belgian philosopher, author, and academic (d. 2009) 1958 – Tim Flach, English photographer and director 1958 – Ulf Wakenius, Swedish guitarist 1959 – Alison Ramsay, English-Scottish field hockey player and lawyer 1960 – Wahab Akbar, Filipino politician (d. 2007) 1960 – Rafael Benítez, Spanish footballer and manager 1960 – Pierre Littbarski, German footballer and manager 1961 – Jarbom Gamlin, Indian lawyer and politician, seventh Chief Minister of Arunachal Pradesh (d. 2014) 1961 – Linda Ruth Williams, British film studies academic 1962 – Anna Dello Russo, Italian journalist 1962 – Douglas Elmendorf, American economist and politician 1962 – Ian MacKaye, American singer-songwriter, guitarist, and producer 1963 – Saleem Malik, Pakistani cricketer 1963 – Jimmy Osmond, American singer 1964 – David Kohan, American screenwriter and producer 1964 – Dave Pirner, American singer, songwriter and producer 1964 – Esbjörn Svensson, Swedish pianist (d. 2008) 1965 – Yves-François Blanchet, Canadian politician 1965 – Jon Cryer, American actor, director, producer, and screenwriter 1965 – Martin Lawrence, American actor, director, producer, and screenwriter 1966 – Jarle Vespestad, Norwegian drummer 1968 – Vickie Guerrero, American wrestler and manager 1968 – Rüdiger Stenzel, German runner 1969 – Patrik Järbyn, Swedish skier 1969 – Fernando Viña, American baseball player and sportscaster 1970 – Dero Goi, German singer-songwriter and drummer 1970 – Walt Williams, American basketball player 1971 – Cameron Blades, Australian rugby player 1971 – Selena, American singer-songwriter, actress, and fashion designer (d. 1995) 1971 – Seigo Yamamoto, Japanese racing driver 1971 – Natasha Zvereva, Belarusian tennis player 1972 – Conchita Martínez, Spanish-American tennis player 1972 – Tracy K. Smith, American poet and educator 1973 – Akon, Senegalese-American singer, rapper and songwriter 1973 – Charlotta Sörenstam, Swedish golfer 1973 – Teddy Cobeña, Spanish-Ecuadorian expressionist and representational sculptor 1976 – Lukas Haas, American actor and musician 1976 – Kelli O'Hara, American actress and singer 1977 – Freddie Ljungberg, Swedish footballer 1979 – Christijan Albers, Dutch racing driver 1979 – Lars Börgeling, German pole vaulter 1979 – Daniel Browne, New Zealand rugby player 1981 – Anestis Agritis, Greek footballer 1981 – Maya Dunietz, Israeli singer-songwriter and pianist 1981 – Matthieu Proulx, Canadian football player 1982 – Gina Carano, American mixed martial artist and actress 1982 – Boris Diaw, French basketball player 1982 – Jonathan Vilma, American football player 1983 – Marié Digby, American singer-songwriter, guitarist, and actress 1983 – Cat Osterman, American softball player 1984 – Teddy Blass, American composer and producer 1984 – Claire Foy, English actress 1984 – Tucker Fredricks, American speed skater 1984 – Paweł Kieszek, Polish footballer 1984 – Kerron Stewart, Jamaican sprinter 1985 – Luol Deng, Sudanese-English basketball player 1985 – Brendon Leonard, New Zealand rugby player 1985 – Taye Taiwo, Nigerian footballer 1986 – Shinji Okazaki, Japanese footballer 1986 – Peter Regin, Danish ice hockey player 1986 – Epke Zonderland, Dutch gymnast 1987 – Cenk Akyol, Turkish basketball player 1987 – Aaron Lennon, English international footballer 1988 – Kyle Okposo, American ice hockey player 1990 – Reggie Jackson, American basketball player 1990 – Vangelis Mantzaris, Greek basketball player 1990 – Tony McQuay, American sprinter 1991 – Nolan Arenado, American baseball player 1991 – Kim Kyung-jung, South Korean footballer 1993 – Chance the Rapper, American rapper 1993 – Mirai Nagasu, Japanese-American figure skater 1996 – Anya Taylor-Joy, Argentine-British actress 1996 – Taylor Townsend, American tennis player 2002 – Sadie Sink, American actress Deaths Pre-1600 AD 69 – Otho, Roman emperor (b. AD 32) 665 – Fructuosus of Braga, French archbishop and saint 1090 – Sikelgaita, duchess of Apulia (b. c. 1040) 1113 – Sviatopolk II of Kiev (b. 1050) 1118 – Adelaide del Vasto, regent of Sicily, mother of Roger II of Sicily, queen of Baldwin I of Jerusalem 1198 – Frederick I, Duke of Austria (b. 1175) 1234 – Richard Marshal, 3rd Earl of Pembroke (b. 1191) 1375 – John Hastings, 2nd Earl of Pembroke, English nobleman and soldier (b. 1347) 1496 – Charles II, Duke of Savoy (b. 1489) 1587 – Anne Seymour, Duchess of Somerset (b. 1497) 1601–1900 1640 – Countess Charlotte Flandrina of Nassau (b. 1579) 1645 – Tobias Hume, Scottish soldier, viol player, and composer (b. 1569) 1687 – George Villiers, 2nd Duke of Buckingham, English poet and politician, Lord Lieutenant of the West Riding of Yorkshire (b. 1628) 1689 – Aphra Behn, English author and playwright (b. 1640) 1742 – Stefano Benedetto Pallavicino, Italian poet and translator (b. 1672) 1756 – Jacques Cassini, French astronomer (b. 1677) 1783 – Christian Mayer, Czech astronomer and educator (b. 1719) 1788 – Georges-Louis Leclerc, Comte de Buffon, French mathematician, cosmologist, and author (b. 1707) 1828 – Francisco Goya, Spanish-French painter and illustrator (b. 1746) 1846 – Domenico Dragonetti, Italian bassist and composer (b. 1763) 1850 – Marie Tussaud, French-English sculptor, founded the Madame Tussauds Wax Museum (b. 1761) 1859 – Alexis de Tocqueville, French historian and philosopher, French Minister of Foreign Affairs (b. 1805) 1879 – Bernadette Soubirous, French nun and saint (b. 1844) 1888 – Zygmunt Florenty Wróblewski, Polish physicist and chemist (b. 1845) 1899 – Emilio Jacinto, Filipino journalist and activist (b. 1875) 1901–present 1904 – Maximilian Kronberger, German poet and author (b. 1888) 1904 – Samuel Smiles, Scottish-English author (b. 1812) 1914 – George William Hill, American astronomer and mathematician (b. 1838) 1915 – Nelson W. Aldrich, American businessman and politician (b. 1841) 1925 – Stefan Nerezov, Bulgarian general (b. 1867) 1928 – Henry Birks, Canadian businessman, founded Henry Birks and Sons (b. 1840) 1928 – Roman Steinberg, Estonian wrestler (b. 1900) 1930 – José Carlos Mariátegui, Peruvian journalist, philosopher, and activist (b. 1894) 1935 – Panait Istrati, Romanian journalist and author (b. 1884) 1937 – Jay Johnson Morrow, American military engineer and politician, third Governor of the Panama Canal Zone (b. 1870) 1938 – Steve Bloomer, English footballer and manager (b. 1874) 1940 – Tony D'Arcy, Irish Republican hunger striker 1941 – Josiah Stamp, 1st Baron Stamp, English economist and civil servant (b. 1880) 1942 – Princess Alexandra of Saxe-Coburg and Gotha (b. 1878) 1942 – Denis St. George Daly, Irish polo player (b. 1862) 1946 – Arthur Chevrolet, Swiss-American race car driver and engineer (b. 1884) 1947 – Rudolf Höss, German SS officer (b. 1900) 1950 – Eduard Oja, Estonian composer, conductor, and critic (b. 1905) 1950 – Anders Peter Nielsen, Danish target shooter (b. 1867) 1955 – David Kirkwood, Scottish engineer and politician (b. 1872) 1958 – Rosalind Franklin, English biophysicist and academic (b. 1920) 1960 – Mihály Fekete, Hungarian actor, screenwriter and film director (b. 1884) 1961 – Carl Hovland, American psychologist and academic (b. 1912) 1965 – Francis Balfour, English soldier and colonial administrator (b. 1884) 1965 – Sydney Chaplin, English actor, comedian, brother of Charlie Chaplin (b. 1885) 1966 – Eric Lambert, Australian author (b. 1918) 1968 – Fay Bainter, American actress (b. 1893) 1968 – Edna Ferber, American novelist, short story writer, and playwright (b. 1885) 1969 – Hem Vejakorn, Thai illustrator and painter (b. 1904) 1970 – Richard Neutra, Austrian-American architect, designed the Los Angeles County Hall of Records (b. 1892) 1970 – Péter Veres, Hungarian politician, Hungarian Minister of Defence (b. 1897) 1972 – Yasunari Kawabata, Japanese novelist and short story writer, Nobel Prize laureate (b. 1899) 1972 – Frank O'Connor, Australian public servant (b. 1894) 1973 – István Kertész, Hungarian conductor and educator (b. 1929) 1978 – Lucius D. Clay, American officer and military governor in occupied Germany (b. 1898) 1980 – Morris Stoloff, American composer (b. 1898) 1985 – Scott Brady, American actor (b. 1924) 1988 – Khalil al-Wazir, Palestinian commander, founded Fatah (b. 1935) 1988 – Youri Egorov, Russian pianist (b. 1954) 1989 – Jocko Conlan, American baseball player and umpire (b. 1899) 1989 – Kaoru Ishikawa Japanese author and educator (b. 1915) 1989 – Miles Lawrence, English cricketer (b. 1940) 1989 – Hakkı Yeten, Turkish footballer, manager and president (b. 1910) 1991 – David Lean, English director, producer, and screenwriter (b. 1908) 1992 – Neville Brand, American actor (b. 1920) 1992 – Alexandru Nicolschi, Romanian spy and activist (b. 1915) 1992 – Andy Russell, American singer and actor (b. 1919) 1994 – Paul-Émilien Dalpé, Canadian labor unionist (b. 1919) 1994 – Ralph Ellison, American novelist and critic (b. 1913) 1996 – Lucille Bremer, American actress and dancer (b. 1917) 1997 – Esmeralda Arboleda Cadavid, Colombian politician (b. 1921) 1997 – Roland Topor, French actor, director, and painter (b. 1938) 1998 – Alberto Calderón, Argentinian-American mathematician and academic (b. 1920) 1998 – Fred Davis, English snooker player (b. 1913) 1998 – Marie-Louise Meilleur, Canadian super-centenarian (b. 1880) 1999 – Skip Spence, Canadian-American singer-songwriter and guitarist (b. 1946) 2001 – Robert Osterloh, American actor (b. 1918) 2001 – Michael Ritchie, American director, producer, and screenwriter (b. 1938) 2001 – Alec Stock, English footballer and manager (b. 1917) 2002 – Billy Ayre, English footballer and manager (b. 1952) 2002 – Ruth Fertel, American businesswoman, founded Ruth's Chris Steak House (b. 1927) 2002 – Robert Urich, American actor (b. 1946) 2003 – Graham Jarvis, Canadian actor (b. 1930) 2003 – Graham Stuart Thomas, English horticulturalist and author (b. 1909) 2005 – Kay Walsh, English actress, singer, and dancer (b. 1911) 2007 – Frank Bateson, New Zealand astronomer (b. 1909) 2007 – Gaétan Duchesne, Canadian ice hockey player (b. 1962) 2007 – Maria Lenk, Brazilian swimmer (b. 1915) 2007 – Chandrabose Suthaharan, Sri Lankan journalist 2008 – Edward Norton Lorenz, American mathematician and meteorologist (b. 1917) 2010 – Rasim Delić, Bosnian general and convicted war criminal (b. 1949) 2010 – Daryl Gates, American police officer, created the D.A.R.E. Program (b. 1926) 2011 – Gerry Alexander, Jamaican cricketer and veterinarian (b. 1928) 2011 – Allan Blakeney, Canadian scholar and politician, tenth Premier of Saskatchewan (b. 1925) 2011 – Sol Saks, American screenwriter and producer (b. 1910) 2012 – Sári Barabás, Hungarian soprano (b. 1914) 2012 – Marian Biskup, Polish author and academic (b. 1922) 2012 – Alan Hacker, English clarinet player and conductor (b. 1938) 2012 – George Kunda, Zambian lawyer and politician, 11th Vice-President of Zambia (b. 1956) 2012 – Mærsk Mc-Kinney Møller, Danish businessman (b. 1913) 2012 – Carlo Petrini, Italian footballer and coach (b. 1948) 2013 – Charles Bruzon, Gibraltarian politician (b. 1938) 2013 – Ali Kafi, Algerian politician (b. 1928) 2013 – Siegfried Ludwig, Austrian politician, 18th Governor of Lower Austria (b. 1926) 2013 – Pentti Lund, Finnish-Canadian ice hockey player (b. 1925) 2013 – George Beverly Shea, Canadian-American singer-songwriter (b. 1909) 2013 – Pat Summerall, American football player and sportscaster (b. 1930) 2013 – Pedro Ramírez Vázquez, Mexican architect, designed the Tijuana Cultural Center and National Museum of Anthropology (b. 1919) 2014 – Gyude Bryant, Liberian businessman and politician (b. 1949) 2014 – Aulis Rytkönen, Finnish footballer and manager (b. 1929) 2014 – Ernst Florian Winter, Austrian-American historian and political scientist (b. 1923) 2015 – Valery Belousov, Russian ice hockey player and coach (b. 1948) 2015 – Stanislav Gross, Czech lawyer and politician, fifth Prime Minister of the Czech Republic (b. 1969) 2018 – Harry Anderson, American actor and magician (b. 1952) 2021 – Andrew Peacock, Australian politician (b. 1939) 2021 – Helen McCrory, British actress (b. 1968) 2021 – Liam Scarlett, British choreographer (b. 1986) 2021 – John Dawes, Welsh rugby union player (b. 1940) Holidays and observances Christian feast day: Benedict Joseph Labre Bernadette Soubirous Drogo Engratia Fructuosus of Braga Isabella Gilmore (Church of England) Martyrs of Zaragoza Molly Brant (Konwatsijayenni) (Anglican Church of Canada, Episcopal Church) Turibius of Astorga April 16 (Eastern Orthodox liturgics) Birthday of José de Diego (Puerto Rico, United States) Birthday of Queen Margrethe II (Denmark) Emancipation Day (Washington, D.C., United States) Memorial Day for the Victims of the Holocaust (Hungary) National Healthcare Decisions Day (United States) Remembrance of Chemical Attack on Balisan and Sheikh Wasan (Iraqi Kurdistan) World Voice Day References External links BBC: On This Day Historical Events on April 16 Days of the year April

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https://en.wikipedia.org/wiki/Associative%20property

Associative property

In mathematics, the associative property is a property of some binary operations, which means that rearranging the parentheses in an expression will not change the result. In propositional logic, associativity is a valid rule of replacement for expressions in logical proofs. Within an expression containing two or more occurrences in a row of the same associative operator, the order in which the operations are performed does not matter as long as the sequence of the operands is not changed. That is (after rewriting the expression with parentheses and in infix notation if necessary), rearranging the parentheses in such an expression will not change its value. Consider the following equations: Even though the parentheses were rearranged on each line, the values of the expressions were not altered. Since this holds true when performing addition and multiplication on any real numbers, it can be said that "addition and multiplication of real numbers are associative operations". Associativity is not the same as commutativity, which addresses whether the order of two operands affects the result. For example, the order does not matter in the multiplication of real numbers, that is, , so we say that the multiplication of real numbers is a commutative operation. However, operations such as function composition and matrix multiplication are associative, but (generally) not commutative. Associative operations are abundant in mathematics; in fact, many algebraic structures (such as semigroups and categories) explicitly require their binary operations to be associative. However, many important and interesting operations are non-associative; some examples include subtraction, exponentiation, and the vector cross product. In contrast to the theoretical properties of real numbers, the addition of floating point numbers in computer science is not associative, and the choice of how to associate an expression can have a significant effect on rounding error. Definition Formally, a binary operation on a set is called associative if it satisfies the associative law: Here, ∗ is used to replace the symbol of the operation, which may be any symbol, and even the absence of symbol (juxtaposition) as for multiplication. The associative law can also be expressed in functional notation thus: . Generalized associative law If a binary operation is associative, repeated application of the operation produces the same result regardless of how valid pairs of parentheses are inserted in the expression. This is called the generalized associative law. For instance, a product of four elements may be written, without changing the order of the factors, in five possible ways: If the product operation is associative, the generalized associative law says that all these expressions will yield the same result. So unless the expression with omitted parentheses already has a different meaning (see below), the parentheses can be considered unnecessary and "the" product can be written unambiguously as As the number of elements increases, the number of possible ways to insert parentheses grows quickly, but they remain unnecessary for disambiguation. An example where this does not work is the logical biconditional . It is associative; thus, is equivalent to , but most commonly means , which is not equivalent. Examples Some examples of associative operations include the following. Propositional logic Rule of replacement In standard truth-functional propositional logic, association, or associativity are two valid rules of replacement. The rules allow one to move parentheses in logical expressions in logical proofs. The rules (using logical connectives notation) are: and where "" is a metalogical symbol representing "can be replaced in a proof with". Truth functional connectives Associativity is a property of some logical connectives of truth-functional propositional logic. The following logical equivalences demonstrate that associativity is a property of particular connectives. The following (and their converses, since is commutative) are truth-functional tautologies. Associativity of disjunction Associativity of conjunction Associativity of equivalence Joint denial is an example of a truth functional connective that is not associative. Non-associative operation A binary operation on a set S that does not satisfy the associative law is called non-associative. Symbolically, For such an operation the order of evaluation does matter. For example: Subtraction Division Exponentiation Vector cross product Also although addition is associative for finite sums, it is not associative inside infinite sums (series). For example, whereas Some non-associative operations are fundamental in mathematics. They appear often as the multiplication in structures called non-associative algebras, which have also an addition and a scalar multiplication. Examples are the octonions and Lie algebras. In Lie algebras, the multiplication satisfies Jacobi identity instead of the associative law; this allows abstracting the algebraic nature of infinitesimal transformations. Other examples are quasigroup, quasifield, non-associative ring, and commutative non-associative magmas. Nonassociativity of floating point calculation In mathematics, addition and multiplication of real numbers is associative. By contrast, in computer science, the addition and multiplication of floating point numbers is not associative, as rounding errors are introduced when dissimilar-sized values are joined together. To illustrate this, consider a floating point representation with a 4-bit mantissa: Even though most computers compute with 24 or 53 bits of mantissa, this is an important source of rounding error, and approaches such as the Kahan summation algorithm are ways to minimise the errors. It can be especially problematic in parallel computing. Notation for non-associative operations In general, parentheses must be used to indicate the order of evaluation if a non-associative operation appears more than once in an expression (unless the notation specifies the order in another way, like ). However, mathematicians agree on a particular order of evaluation for several common non-associative operations. This is simply a notational convention to avoid parentheses. A left-associative operation is a non-associative operation that is conventionally evaluated from left to right, i.e., while a right-associative operation is conventionally evaluated from right to left: Both left-associative and right-associative operations occur. Left-associative operations include the following: Subtraction and division of real numbers Function application This notation can be motivated by the currying isomorphism, which enables partial application. Right-associative operations include the following: Exponentiation of real numbers in superscript notation Exponentiation is commonly used with brackets or right-associatively because a repeated left-associative exponentiation operation is of little use. Repeated powers would mostly be rewritten with multiplication: Formatted correctly, the superscript inherently behaves as a set of parentheses; e.g. in the expression the addition is performed before the exponentiation despite there being no explicit parentheses wrapped around it. Thus given an expression such as , the full exponent of the base is evaluated first. However, in some contexts, especially in handwriting, the difference between , and can be hard to see. In such a case, right-associativity is usually implied. Function definition Using right-associative notation for these operations can be motivated by the Curry–Howard correspondence and by the currying isomorphism. Non-associative operations for which no conventional evaluation order is defined include the following. Exponentiation of real numbers in infix notation Knuth's up-arrow operators Taking the cross product of three vectors Taking the pairwise average of real numbers Taking the relative complement of sets .(Compare material nonimplication in logic.) History William Rowan Hamilton seems to have coined the term "associative property" around 1844, a time when he was contemplating the non-associative algebra of the octonions he had learned about from John T. Graves. See also Light's associativity test Telescoping series, the use of addition associativity for cancelling terms in an infinite series A semigroup is a set with an associative binary operation. Commutativity and distributivity are two other frequently discussed properties of binary operations. Power associativity, alternativity, flexibility and N-ary associativity are weak forms of associativity. Moufang identities also provide a weak form of associativity. References Properties of binary operations Elementary algebra Functional analysis Rules of inference

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https://en.wikipedia.org/wiki/The%20Apache%20Software%20Foundation

The Apache Software Foundation

The Apache Software Foundation (ASF) is an American nonprofit corporation (classified as a 501(c)(3) organization in the United States) to support a number of open source software projects. The ASF was formed from a group of developers of the Apache HTTP Server, and incorporated on March 25, 1999. As of 2021, it includes approximately 1000 members. The Apache Software Foundation is a decentralized open source community of developers. The software they produce is distributed under the terms of the Apache License, a permissive open-source license for free and open-source software (FOSS). The Apache projects are characterized by a collaborative, consensus-based development process and an open and pragmatic software license, which is to say that it allows developers who receive the software freely, to re-distribute it under nonfree terms. Each project is managed by a self-selected team of technical experts who are active contributors to the project. The ASF is a meritocracy, implying that membership of the foundation is granted only to volunteers who have actively contributed to Apache projects. The ASF is considered a second generation open-source organization, in that commercial support is provided without the risk of platform lock-in. Among the ASF's objectives are: to provide legal protection to volunteers working on Apache projects; to prevent the Apache brand name from being used by other organizations without permission. The ASF also holds several ApacheCon conferences each year, highlighting Apache projects and related technology. History The history of the Apache Software Foundation is linked to the Apache HTTP Server, development beginning in February 1993. A group of eight developers started working on enhancing the NCSA HTTPd daemon. They came to be known as the Apache Group. On March 25, 1999, the Apache Software Foundation was formed. The first official meeting of the Apache Software Foundation was held on April 13, 1999. The initial members of the Apache Software Foundation consisted of the Apache Group: Brian Behlendorf, Ken Coar, Miguel Gonzales, Mark Cox, Lars Eilebrecht, Ralf S. Engelschall, Roy T. Fielding, Dean Gaudet, Ben Hyde, Jim Jagielski, Alexei Kosut, Martin Kraemer, Ben Laurie, Doug MacEachern, Aram Mirzadeh, Sameer Parekh, Cliff Skolnick, Marc Slemko, William (Bill) Stoddard, Paul Sutton, Randy Terbush and Dirk-Willem van Gulik. After a series of additional meetings to elect board members and resolve other legal matters regarding incorporation, the effective incorporation date of the Apache Software Foundation was set to June 1, 1999. Co-founder Brian Behlendorf states how the name 'Apache' was chosen: "I suggested the name Apache partly because the web technologies at the time that were launching were being called cyber this or spider that or something on those themes and I was like we need something a little more interesting, a little more romantic, not to be a cultural appropriator or anything like that, I had just seen a documentary about Geronimo and the last days of a Native American tribe called the Apaches, right, who succumbed to the invasion from the West, from the United States, and they were the last tribe to give up their territory and for me that almost romantically represented what I felt we were doing with this web-server project..." Projects Apache divides its software development activities into separate semi-autonomous areas called "top-level projects" (formally known as a "Project Management Committee" in the bylaws), some of which have a number of sub-projects. Unlike some other organizations that host FOSS projects, before a project is hosted at Apache it has to be licensed to the ASF with a grant or contributor agreement. In this way, the ASF gains the necessary intellectual property rights for the development and distribution of all its projects. Board of directors The Board of Directors of The Apache Software Foundation (ASF) is responsible for management and oversight of the business and affairs of the corporation in accordance with the Bylaws. This includes management of the corporate assets (funds, intellectual property, trademarks, and support equipment), appointment of a President and corporate officers managing the core operations of the ASF, and allocation of corporate resources for the benefit of Apache projects. Technical decision-making authority for every Apache project is assigned to their independent project management committee; the participants in each project provide direction, not the board. The board is elected annually by the ASF membership. Since March 17, 2021, the board of directors has been: Bertrand Delacretaz Roy T. Fielding Sharan Foga Justin Mclean Sam Ruby Craig L. Russell Roman Shaposhnik Sander Striker Sheng Wu See also List of Apache Software Foundation projects Apache Attic Apache Incubator Log4Shell CNCF Linux Foundation Notes Further reading Wikinomics: How Mass Collaboration Changes Everything (2006); Don Tapscott, Anthony D. Williams. External links ApacheCon website “Trillions and Trillions Served” Feature documentary by the Apache Software Foundation detailing its history and impact on the open-source software community (2020) 1999 establishments in Maryland 501(c)(3) organizations Free and open-source software organizations Non-profit organizations based in Maryland Software companies established in 1999

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

Americans with Disabilities Act of 1990

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

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

Apple I

The Apple Computer 1, originally released as the Apple Computer and known later as the Apple I or Apple-1, is an 8-bit desktop computer released by the Apple Computer Company (now Apple Inc.) in 1976. It was designed by Steve Wozniak. The idea of selling the computer came from Wozniak's friend and Apple co-founder Steve Jobs. The Apple I was Apple's first product, and to finance its creation, Wozniak sold his HP-65 calculator for $500 and Jobs sold a second hand VW Microbus, for a few hundred dollars (Wozniak later said that Jobs planned instead to use his bicycle to get around). Wozniak demonstrated the first prototype in July 1976 at the Homebrew Computer Club in Palo Alto, California. Production was discontinued on September 30, 1977, after the June 10, 1977 introduction of its successor, the Apple II, which Byte magazine referred to as part of the "1977 Trinity" of personal computing (along with the PET 2001 from Commodore Business Machines and the TRS-80 Model I from Tandy Corporation). History on March 5, 1975, Steve Wozniak attended the first meeting of the Homebrew Computer Club in Gordon French's garage. He was so inspired that he immediately set to work on what would eventually become the Apple I computer. After building it for himself and showing it at the club, he and Steve Jobs gave out schematics (technical designs) for the computer to interested club members and even helped some of them build and test out copies. Then, Steve Jobs suggested that they design and sell a single etched and silkscreened circuit board—just the bare board, with no electronic parts—that people could use to build the computers. Wozniak calculated that having the board design laid out would cost and manufacturing would cost another per board; he hoped to recoup his costs if 50 people bought the boards for each. To fund this small venture—their first company—Jobs sold his van and Wozniak sold his HP-65 calculator. Very soon after, Steve Jobs arranged to sell "something like 50" completely-built computers to the Byte Shop (a computer store in Mountain View, California) at each. To fulfill the order, they obtained in parts at 30 days net and delivered the finished product in 10 days. The Apple I went on sale in July 1976 at a price of , because Wozniak "liked repeating digits" and because of a one-third markup on the wholesale price. Jobs had managed to get the inventory into the nation's first four storefront microcomputer retailers: Byte Shop (Palo Alto, California), itty bitty machine company (Evanston, Illinois), Data Domain (Bloomington, Indiana), and Computer Mart (New York City). The first unit produced was used in a high school math class, and donated to Liza Loop's public-access computer center. About 200 units were produced, and all but 25 were sold within nine or ten months. In April 1977, the price was dropped to . It continued to be sold through August 1977, despite the introduction of the Apple II in April 1977, which began shipping in June of that year. In October 1977, the Apple I was officially discontinued and removed from Apple's price list. As Wozniak was the only person who could answer most customer support questions about the computer, the company offered Apple I owners discounts and trade-ins for Apple IIs to persuade them to return their computers. These recovered boards were then destroyed by Apple, contributing to their rarity today. Overview Wozniak's design originally used a Motorola 6800 processor, which cost $175, but when MOS Technology introduced the much cheaper 6502 microprocessor ($25) he switched. The Apple I CPU ran at , a fraction () of the NTSC color carrier which simplified video circuitry. Memory used the new 4-Kbit DRAM chips, and was , expandable to on board, or externally. The board was designed to use the next generation of 16-Kbit memory chips when they became available. An optional $75 plug-in cassette interface card allowed users to store programs on ordinary audio cassette tapes. A BASIC interpreter, originally written by Wozniak, was provided that let users easily write programs and play simple games. An onboard AC power supply was included. The Apple I's built-in computer terminal circuitry with TV composite output used shift registers and a character generator. All one needed was a television set and a ASCII keyboard. The Apple 1 did not come with a case. It was either used as-is or some chose to build custom (mostly wooden) cases. Competing machines such as the Altair 8800 generally were programmed with front-mounted toggle switches and used indicator lights (red LEDs, most commonly) for output, and had to be extended with separate hardware to allow connection to a computer terminal or a teletypewriter machine. This made the Apple I, along with earlier introduced Sphere 1 and other hobbyist microcomputers, an innovative machine for its day. Apple I character set The computer used a Signetics 2513 64×8×5 Character Generator, capable of displaying uppercase characters, numbers and basic punctuation and math symbols with a 5x8 pixel font: Collectors' item , 62 Apple I computers have been confirmed to exist, and, according to unverified information, 20 more are likely to exist. From these, 41 were produced in the first batch, 39 in the second batch, and 2 unknown versions, potentially from other batches, also exist. Most are now in working condition. The 1986 official Apple IIe Owner's Guide stated "Collectors now pay between $10,000 and $15,000 for an Apple I." An Apple I reportedly sold for US$50,000 at auction in 1999. In 2008, the website Vintage Computing and Gaming reported that Apple I owner Rick Conte was looking to sell his unit and was "expecting a price in excess of U.S." The site later reported Conte had donated the unit to the Maine Personal Computer Museum in 2009. A unit was sold in September 2009 for on eBay. A unit belonging to early Apple Computer engineers Dick and Cliff Huston was sold on March 23, 2010, for on eBay. In November 2010, an Apple I sold for £133,250 ($210,000) at Christie's auction house in London. The high price was likely due to the rare documents and packaging offered in the sale in addition to the computer, including the original packaging (with the return label showing Steve Jobs' parents' address, the original Apple Computer Inc "headquarters" being their garage), a personally typed and signed letter from Jobs (answering technical questions about the computer), and the original invoice showing "Steven" as the salesman. The computer was brought to Polytechnic University of Turin where it was fixed and used to run the BASIC programming language. On June 15, 2012, a working Apple I was sold at auction by Sotheby's for a then-record , more than double the expected price. This unit is on display at the Nexon Computer Museum in Jeju City, South Korea. In October 2012, a non-working Apple I from the estate of former Apple Computer employee Joe Copson was put up for auction by Christie's, but found no bidder who was willing to pay the starting price of (£50,000). Copson's board had previously been listed on eBay in December 2011, with a starting bid of and failed to sell. Following the Christie's auction, the board was restored to working condition by computer historian Corey Cohen. Copson's Apple I was once again listed on eBay, where it sold for US$236,100.03 on April 23, 2015. On November 24, 2012, a working Apple I was sold at auction by Auction Team Breker for €400,000 (). On May 25, 2013, a functioning 1976 model was sold for a then-record €516,000 () in Cologne. Auction Team Breker said "an unnamed Asian client" bought the Apple I. This particular unit has Wozniak's signature. An old business transaction letter from Jobs also was included, as well as the original owner's manual. On June 24, 2013, an Apple I was listed by Christie's as part of a special online-only auction lot called "First Bytes: Iconic Technology From the Twentieth Century." Bidding ran through July 9, 2013. The unit sold for . In November 2013, a working unit speculated to have been part of the original lot of 50 boards delivered to the Byte Shop was listed by Auction Team Breker for (), but failed to sell during the auction. Immediately following the close of bidding, a private collector purchased it for (). This board was marked "01-0046," matching the numbering placed on other units sold to the Byte Shop and included the original operation manuals, software cassettes, and shipping box autographed by Steve Wozniak. The board also bears Wozniak's signature. In October 2014, a working, early Apple I was sold at auction for to the Henry Ford Museum in Dearborn, Michigan. The sale included the keyboard, monitor, cassette decks and a manual. The auction was run by Bonhams. On December 13, 2014, a fully functioning, early Apple I was sold at auction for by auction house Christie's. The sale included a keyboard, custom case, original manual and a check labeled "Purchased July 1976 from Steve Jobs in his parents' garage in Los Altos". On May 30, 2015, a woman reportedly dropped off boxes of electronics for disposal at an electronics recycling center in the Silicon Valley of Northern California. Included in the items removed from her garage after the death of her husband was an original Apple I computer, which the recycling firm sold for to a private collector. It is the company's practice to give back 50% of the proceeds to the original owner when an item is sold, so they want to find the mystery donor. On September 21, 2015, an Apple I bearing the Byte Shop number 01-0059 was listed by Bonhams Auctions as part of their "History of Science and Technology" auction with a starting bid of US$300,000. The machine was described as, "in near perfect condition." The owner, Tom Romkey, "...only used the Apple-1 once or twice, and ...set it on a shelf, and did not touch it again." The machine did not sell. However, Glenn and Shannon Dellimore, the co-founders of GLAMGLOW, a beauty company which they sold to Estee Lauder Companies, bought it after the auction through Bonhams Auction house. On the 40th Anniversary of Apple Computers 2016 the Dellimore's working Apple-1 went on loan and on display in 'Artifact' at the V&A Museum in London, England. On August 26, 2016, an Apple I made and hand-built by Steve Jobs himself (according to Apple I expert Corey Cohen) and dubbed the 'Holy Grail' of computers was sold for to winning bidders Glenn and Shannon Dellimore, the co-founders of cosmetics firm Glamglow, in an auction by Charitybuzz. The for-profit internet company that raises funds for nonprofit organizations declared that ten percent of the proceeds will go to the Leukemia and Lymphoma Society, based in New York. On April 15, 2017, an Apple I removed from Steve Jobs's office in 1985 by Apple quality control engineer Don Hutmacher was placed on display at Living Computers: Museum + Labs. This Apple I was modified by Dan Kottke and Bill Fernandez. This previously unknown unit was purchased from Hutmacher's heirs for an undisclosed amount. On September 25, 2018, a functioning Apple I was purchased at a Dallas auction for by an anonymous buyer. On May 23, 2019, an Apple I was purchased through Christie's auction house in London for £371,000. This Apple I is uniquely built into the bottom half of a briefcase and the lot included a modified cassette interface card, Panasonic RQ-309DS cassette tape recorder, SWTPC PR-40 alphanumeric printer, Sanyo VM4209 monitor and Motorola M6800 microprocessor. On March 12, 2020, a fully-functional Apple I was purchased at a Boston auction for . The lot included the original board with a Synertek CPU, Apple Cassette Interface, display case, keyboard kit, power supply, monitor and manuals. On November 9, 2021, one sold with user manuals and Apple software on two cassette tapes for (many wrote $400,000 and forgot the premium), originally purchased by a college professor then sold to his student for . On August 18, 2022, the only known Apple I prototype in existence, dubbed Production Prototype Computer A, sold on RR Auction for over (roughly 200x the original Apple I price adjusted for inflation), after nearly a month on auction. The prototype is heavily damaged—having been split down the near-middle—and only the left-hand portion (bearing the "Apple Computer A" marking) survives. This prototype was thought lost for nearly 40 years, surviving in only several Polaroids taken by Paul Terrell, whose Byte Shop computer outlet was the first to stock Apple I in 1976. Terrell signed on to order shipments of the Apple I after viewing this prototype, which is said to have been hand-soldered by Wozniak. Serial numbers Both Steve Jobs and Steve Wozniak have stated that Apple did not assign serial numbers to the Apple l. Several boards have been found with numbered stickers affixed to them, which appear to be inspection stickers from the PCB manufacturer/assembler. A batch of boards is known to have numbers hand-written in black permanent marker on the back; these usually appear as "01-00##". As of January 2022, 29 Apple-1s with a serial number are known. The highest known number is . Two original Apple-1s have been analyzed by PSA, Los Angeles, concluding the serial numbers had been hand-written by Steve Jobs. Museums displaying an original Apple 1 Computer United States American Computer & Robotics Museum in Bozeman, Montana Computer History Museum in Mountain View, California Computer Museum of America in Roswell, Georgia Smithsonian Museum of American History in Washington, DC Living Computers: Museum + Labs in Seattle, Washington System Source Computer Museum in Hunt Valley, Maryland Australia Powerhouse Museum in Sydney, New South Wales Germany Heinz Nixdorf MuseumsForum in Paderborn (working condition) Deutsches Museum in Munich (working condition) United Kingdom Science Museum, London in London, United Kingdom South Korea Nexon Computer Museum in Jeju Island, South Korea Switzerland ENTER Computer Museum in Solothurn, Switzerland (ONLY the case is visible. It is unknown if an original Apple-1 is really inside. No picture of the Apple-1 can be found there.) Clones and replicas Several Apple I clones and replicas have been released in recent years. These are all created by hobbyists and marketed to the hobbyist/collector community. Availability is usually limited to small runs in response to demand. Replica 1: Created by Vince Briel. A software-compatible clone, produced using modern components, released in 2003 at a price of around $150. PE6502: Created by Jason Putnam. A single board computer kit made with all through-hole and current production components. Runs Apple 1 "Integer BASIC", a clone of AppleSoft BASIC (floating point capable), Wozmon and Krusader- all built-in ROM. 32k of RAM, and a Parallax Propeller terminal. Software compatible with the Apple 1. A-One: Created by Frank Achatz, also using modern components. RC6502 Apple I Replica, which uses a modern or period CPU and MC6821 PIA, and usually modern RAM and ROM. The system is modular, with multiple boards plugging into a backplane, but a single-board version (using an Arduino Nano to replace the keyboard and video hardware with a serial interface) is also available. Obtronix Apple I reproduction: Created by Steve Gabaly, using original components or equivalents thereof. Sold through eBay. Mimeo 1: Created by Mike Willegal. A hardware kit designed to replicate a real Apple I as accurately possible. Buyers are expected to assemble the kits themselves. Newton 1: Created by Michael Ng and released in 2012. Similar to the Mimeo 1, but is made using the same materials and same obsolete processing technique commonly used in the 1970s. Over 400 bare boards, kits and assembled boards were sold. There are Newton NTI and non-NTI versions available. Brain Board, a plug-in firmware board for the Apple II that, with the optional "Wozanium Pack" program, can emulate a functional Apple-1. Replica by MDesk. An accurate PCB copy of original Apple 1 was researched in 2012–2014. A few PCBs without components were sold for $26 in 2014. SmartyKit 1 computer kit: created by Sergey Panarin with package design by Greg Chemeris and released in 2019. A hardware kit on breadboards designed to replicate a real Apple I with modern components (ROM, RAM, Arduino controllers for video and keyboard) and real 6502 CPU. Made to teach anyone how to build a computer and how it works. Was presented at CES 2020 in Las Vegas and then featured in Apple Insider, WIRED, Tom's Hardware. JRM2020: Created by Justin McDermid and released in 2020. Apple 1 replica motherboards in both regular and NTI versions based on edited open source Russian design. Spartan: A very accurate Apple 1 clone motherboard design created in 2022 by Justin McDermid with both non-NTI and NTI versions available as well as a special Apple Computer A version of the Apple 1 prototype motherboard. Emulation Apple 1js, a web-based Apple I emulator written in JavaScript. MESS, a multi-system emulator able to emulate the Apple I. OpenEmulator, an accurate emulator of the Apple I, the ACI (Apple Cassette Interface) and CFFA1 expansion card. Pom1, an open source Apple I emulator for Microsoft Windows, Arch Linux and Android devices. Apple 1 Emulator, an emulator for the SAM Coupé home computer. CocoaPom, a Java-based emulator with a Cocoa front-end for Macintosh. Sim6502, an Apple I emulator for Macintosh. Green Delicious Apple-1, an emulator for the Commodore 64. See also Computer museums History of computer science History of computing References Citations Sources Price, Rob (1987). So Far: The First Ten Years of a Vision. Cupertino, Calif.: Apple Computer. . Owad, Tom (2005). Apple I Replica Creation: Back to the Garage. Rockland, Mass.: Syngress Publishing. . External links Apple I Computer specifications Bugbook Computer Museum blog. Apple 1 display. Apple I Owners Club Apple I Operational Manual (browse) German making-of article to recreate the Apple I Operational Manual Apple I project on www.sbprojects.com Apple 1 Computer Registry Macintosh Prehistory: The Apple I John Calande III blog – Building the Apple I clone, including corrections on the early history of Apple Computer Apple 1 | Cameron's Closet – includes display of the Apple 1's character set on real hardware, compared to on most emulators Computer-related introductions in 1976 Apple II family Apple Inc. hardware Early microcomputers 6502-based home computers Character sets

1346

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

Apatosaurus

Apatosaurus (; meaning "deceptive lizard") is a genus of herbivorous sauropod dinosaur that lived in North America during the Late Jurassic period. Othniel Charles Marsh described and named the first-known species, A. ajax, in 1877, and a second species, A. louisae, was discovered and named by William H. Holland in 1916. Apatosaurus lived about 152 to 151 million years ago (mya), during the late Kimmeridgian to early Tithonian age, and are now known from fossils in the Morrison Formation of modern-day Colorado, Oklahoma, New Mexico, Wyoming, and Utah in the United States. Apatosaurus had an average length of , and an average mass of . A few specimens indicate a maximum length of 11–30% greater than average and a mass of approximately . The cervical vertebrae of Apatosaurus are less elongated and more heavily constructed than those of Diplodocus, a diplodocid like Apatosaurus, and the bones of the leg are much stockier despite being longer, implying that Apatosaurus was a more robust animal. The tail was held above the ground during normal locomotion. Apatosaurus had a single claw on each forelimb and three on each hindlimb. The Apatosaurus skull, long thought to be similar to Camarasaurus, is much more similar to that of Diplodocus. Apatosaurus was a generalized browser that likely held its head elevated. To lighten its vertebrae, Apatosaurus had air sacs that made the bones internally full of holes. Like that of other diplodocids, its tail may have been used as a whip to create loud noises, or, as more recently suggested, as a sensory organ. The skull of Apatosaurus was confused with that of Camarasaurus and Brachiosaurus until 1909, when the holotype of A. louisae was found, and a complete skull just a few meters away from the front of the neck. Henry Fairfield Osborn disagreed with this association, and went on to mount a skeleton of Apatosaurus with a Camarasaurus skull cast. Apatosaurus skeletons were mounted with speculative skull casts until 1970, when McIntosh showed that more robust skulls assigned to Diplodocus were more likely from Apatosaurus. Apatosaurus is a genus in the family Diplodocidae. It is one of the more basal genera, with only Amphicoelias and possibly a new, unnamed genus more primitive. Although the subfamily Apatosaurinae was named in 1929, the group was not used validly until an extensive 2015 study. Only Brontosaurus is also in the subfamily, with the other genera being considered synonyms or reclassified as diplodocines. Brontosaurus has long been considered a junior synonym of Apatosaurus; its type species was reclassified as A.excelsus in 1903. A 2015 study concluded that Brontosaurus is a valid genus of sauropod distinct from Apatosaurus, but not all paleontologists agree with this division. As it existed in North America during the late Jurassic, Apatosaurus would have lived alongside dinosaurs such as Allosaurus, Camarasaurus, Diplodocus, and Stegosaurus. Description Apatosaurus was a large, long-necked, quadrupedal animal with a long, whip-like tail. Its forelimbs were slightly shorter than its hindlimbs. Most size estimates are based on specimen CM3018, the type specimen of A.louisae, reaching in length and in body mass. A 2015 study that estimated the mass of volumetric models of Dreadnoughtus, Apatosaurus, and Giraffatitan estimates CM3018 at , similar in mass to Dreadnoughtus. Some specimens of A.ajax (such as OMNH1670) represent individuals 1130% longer, suggesting masses twice that of CM3018 or , potentially rivaling the largest titanosaurs. However, the upper size estimate of OMNH1670 is likely an exaggeration, with the size estimates revised in 2020 at in length and in body mass based on volumetric analysis. The skull is small in relation to the size of the animal. The jaws are lined with spatulate (chisel-like) teeth suited to an herbivorous diet. The snout of Apatosaurus and similar diplodocoids is squared, with only Nigersaurus having a squarer skull. The braincase of Apatosaurus is well preserved in specimen BYU17096, which also preserved much of the skeleton. A phylogenetic analysis found that the braincase had a morphology similar to those of other diplodocoids. Some skulls of Apatosaurus have been found still in articulation with their teeth. Those teeth that have the enamel surface exposed do not show any scratches on the surface; instead, they display a sugary texture and little wear. Like those of other sauropods, the neck vertebrae are deeply bifurcated; they carried neural spines with a large trough in the middle, resulting in a wide, deep neck. The vertebral formula for the holotype of A.louisae is 15cervicals, 10dorsals, 5sacrals, and 82caudals. The caudal vertebra number may vary, even within species. The cervical vertebrae of Apatosaurus and Brontosaurus are stouter and more robust than those of other diplodocids and were found to be most similar to Camarasaurus by Charles Whitney Gilmore. In addition, they support cervical ribs that extend farther towards the ground than in diplodocines, and have vertebrae and ribs that are narrower towards the top of the neck, making the neck nearly triangular in cross-section. In Apatosaurus louisae, the atlas-axis complex of the first cervicals is nearly fused. The dorsal ribs are not fused or tightly attached to their vertebrae and are instead loosely articulated. Apatosaurus has ten dorsal ribs on either side of the body. The large neck was filled with an extensive system of weight-saving air sacs. Apatosaurus, like its close relative Supersaurus, has tall neural spines, which make up more than half the height of the individual bones of its vertebrae. The shape of the tail is unusual for a diplodocid; it is comparatively slender because of the rapidly decreasing height of the vertebral spines with increasing distance from the hips. Apatosaurus also had very long ribs compared to most other diplodocids, giving it an unusually deep chest. As in other diplodocids, the tail transformed into a whip-like structure towards the end. The limb bones are also very robust. Within Apatosaurinae, the scapula of Apatosaurus louisae is intermediate in morphology between those of A.ajax and Brontosaurus excelsus. The arm bones are stout, so the humerus of Apatosaurus resembles that of Camarasaurus, as well as Brontosaurus. However, the humeri of Brontosaurus and A.ajax are more similar to each other than they are to A.louisae. In 1936, Charles Gilmore noted that previous reconstructions of Apatosaurus forelimbs erroneously proposed that the radius and ulna could cross; in life they would have remained parallel. Apatosaurus had a single large claw on each forelimb, a feature shared by all sauropods more derived than Shunosaurus. The first three toes had claws on each hindlimb. The phalangeal formula is 2-1-1-1-1, meaning the innermost finger (phalanx) on the forelimb has two bones and the next has one. The single manual claw bone (ungual) is slightly curved and squarely truncated on the anterior end. The pelvic girdle includes the robust ilia, and the fused (co-ossified) pubes and ischia. The femora of Apatosaurus are very stout and represent some of the most robust femora of any member of Sauropoda. The tibia and fibula bones are different from the slender bones of Diplodocus but are nearly indistinguishable from those of Camarasaurus. The fibula is longer and slenderer than the tibia. The foot of Apatosaurus has three claws on the innermost digits; the digit formula is 3-4-5-3-2. The first metatarsal is the stoutest, a feature shared among diplodocids. Discovery and species Initial discovery The first Apatosaurus fossils were discovered by Arthur Lakes, a local miner, and his friend Henry C. Beckwith in the spring of 1877 in Morrison, a town in the eastern foothills of the Rocky Mountains in Jefferson County, Colorado. Arthur Lakes wrote to Othniel Charles Marsh, Professor of Paleontology at Yale University, and Edward Drinker Cope, paleontologist based in Philadelphia, about the discovery until eventually collecting several fossils and sending them to both paleontologists. Marsh named Atlantosaurus montanus based on some of the fossils sent and hired Lakes to collect the rest of the material at Morrison and send it to Yale, while Cope attempted to hire Lakes as well but was rejected. One of the best specimens collected by Lakes in 1877 was a well preserved partial postcranial skeleton, including many vertebrae, and a partial braincase (YPM VP 1860), which was sent to Marsh and named Apatosaurus ajax in November 1877. The composite term Apatosaurus comes from the Greek words ()/ () meaning "deception"/"deceptive", and () meaning "lizard"; thus, "deceptive lizard". Marsh gave it this name based on the chevron bones, which are dissimilar to those of other dinosaurs; instead, the chevron bones of Apatosaurus showed similarities with those of mosasaurs, most likely that of the representative species Mosasaurus. By the end of excavations at Lakes' quarry in Morrison, several partial specimens of Apatosaurus had been collected, but only the type specimen of A. ajax can be confidently referred to the species. During excavation and transportation, the bones of the holotype skeleton were mixed with those of another Apatosaurine individual originally described as Atlantosaurus immanis; as a consequence, some elements cannot be ascribed to either specimen with confidence. Marsh distinguished the new genus Apatosaurus from Atlantosaurus on the basis of the number of sacral vertebrae, with Apatosaurus possessing three and Atlantosaurus four. Recent research shows that traits usually used to distinguish taxa at this time were actually widespread across several taxa, causing many of the taxa named to be invalid, like Atlantosaurus. Two years later, Marsh announced the discovery of a larger and more complete specimen (YPM VP 1980) from Como Bluff, Wyoming, he gave this specimen the name Brontosaurus excelsus. Also at Como Bluff, the Hubbell brothers working for Edward Drinker Cope collected a tibia, fibula, scapula, and several caudal vertebrae along with other fragments belonging to Apatosaurus in 1877–78 at Cope's Quarry 5 at the site. Later in 1884, Othniel Marsh named Diplodocus lacustris based on a chimeric partial dentary, snout, and several teeth collected by Lakes in 1877 at Morrison. In 2013, it was suggested that the dentary of D. lacustris and its teeth were actually from Apatosaurus ajax based on its proximity to the type braincase of A. ajax. All specimens currently considered Apatosaurus were from the Morrison Formation, the location of the excavations of Marsh and Cope. Second Dinosaur Rush and skull issue After the end of the Bone Wars, many major institutions in the eastern United States were inspired by the depictions and finds by Marsh and Cope to assemble their own dinosaur fossil collections. The competition to mount the first sauropod skeleton specifically was the most intense, with the American Museum of Natural History, Carnegie Museum of Natural History, and Field Museum of Natural History all sending expeditions to the west to find the most complete sauropod specimen, bring it back to the home institution, and mount it in their fossil halls. The American Museum of Natural History was the first to launch an expedition, finding a well preserved skeleton (AMNH 460), which is occasionally assigned to Apatosaurus, is considered nearly complete; only the head, feet, and sections of the tail are missing, and it was the first sauropod skeleton mounted. The specimen was found north of Medicine Bow, Wyoming, in 1898 by Walter Granger, and took the entire summer to extract. To complete the mount, sauropod feet that were discovered at the same quarry and a tail fashioned to appear as Marsh believed it shouldbut which had too few vertebraewere added. In addition, a sculpted model of what the museum thought the skull of this massive creature might look like was made. This was not a delicate skull like that of Diplodocuswhich was later found to be more accuratebut was based on "the biggest, thickest, strongest skull bones, lower jaws and tooth crowns from three different quarries". These skulls were likely those of Camarasaurus, the only other sauropod for which good skull material was known at the time. The mount construction was overseen by Adam Hermann, who failed to find Apatosaurus skulls. Hermann was forced to sculpt a stand-in skull by hand. Osborn said in a publication that the skull was "largely conjectural and based on that of Morosaurus" (now Camarasaurus). In 1903, Elmer Riggs published a study that described a well-preserved skeleton of a diplodocid from the Grand River Valley near Fruita, Colorado, Field Museum of Natural History specimen P25112. Riggs thought that the deposits were similar in age to those of the Como Bluff in Wyoming from which Marsh had described Brontosaurus. Most of the skeleton was found, and after comparison with both Brontosaurus and Apatosaurus ajax, Riggs realized that the holotype of A.ajax was immature, and thus the features distinguishing the genera were not valid. Since Apatosaurus was the earlier name, Brontosaurus should be considered a junior synonym of Apatosaurus. Because of this, Riggs recombined Brontosaurus excelsus as Apatosaurus excelsus. Based on comparisons with other species proposed to belong to Apatosaurus, Riggs also determined that the Field Columbian Museum specimen was likely most similar to A.excelsus. Despite Riggs' publication, Henry Fairfield Osborn, who was a strong opponent of Marsh and his taxa, labeled the Apatosaurus mount of the American Museum of Natural History Brontosaurus. Because of this decision the name Brontosaurus was commonly used outside of scientific literature for what Riggs considered Apatosaurus, and the museum's popularity meant that Brontosaurus became one of the best known dinosaurs, even though it was invalid throughout nearly all of the 20th and early 21st centuries. It was not until 1909 that an Apatosaurus skull was found during the first expedition, led by Earl Douglass, to what would become known as the Carnegie Quarry at Dinosaur National Monument. The skull was found a short distance from a skeleton (specimen CM3018) identified as the new species Apatosaurus louisae, named after Louise Carnegie, wife of Andrew Carnegie, who funded field research to find complete dinosaur skeletons in the American West. The skull was designated CM11162; it was very similar to the skull of Diplodocus. Another smaller skeleton of A.louisae was found nearby CM11162 and CM3018. The skull was accepted as belonging to the Apatosaurus specimen by Douglass and Carnegie Museum director William H. Holland, although other scientistsmost notably Osbornrejected this identification. Holland defended his view in 1914 in an address to the Paleontological Society of America, yet he left the Carnegie Museum mount headless. While some thought Holland was attempting to avoid conflict with Osborn, others suspected Holland was waiting until an articulated skull and neck were found to confirm the association of the skull and skeleton. After Holland's death in 1934, museum staff placed a cast of a Camarasaurus skull on the mount. While most other museums were using cast or sculpted Camarasaurus skulls on Apatosaurus mounts, the Yale Peabody Museum decided to sculpt a skull based on the lower jaw of a Camarasaurus, with the cranium based on Marsh's 1891 illustration of the skull. The skull also included forward-pointing nasalssomething unusual for any dinosaurand fenestrae differing from both the drawing and other skulls. No Apatosaurus skull was mentioned in literature until the 1970s when John Stanton McIntosh and David Berman redescribed the skulls of Diplodocus and Apatosaurus. They found that though he never published his opinion, Holland was almost certainly correct, that Apatosaurus had a Diplodocus-like skull. According to them, many skulls long thought to pertain to Diplodocus might instead be those of Apatosaurus. They reassigned multiple skulls to Apatosaurus based on associated and closely associated vertebrae. Even though they supported Holland, it was noted that Apatosaurus might have possessed a Camarasaurus-like skull, based on a disarticulated Camarasaurus-like tooth found at the precise site where an Apatosaurus specimen was found years before. On October20, 1979, after the publications by McIntosh and Berman, the first true skull of Apatosaurus was mounted on a skeleton in a museum, that of the Carnegie. In 1998, it was suggested that the Felch Quarry skull that Marsh had included in his 1896 skeletal restoration instead belonged to Brachiosaurus. Recent discoveries and reassesment In 2011, the first specimen of Apatosaurus where a skull was found articulated with its cervical vertebrae was described. This specimen, CMCVP7180, was found to differ in both skull and neck features from A.louisae, but shared many features of the cervical vertebrae with A.ajax. Another well-preserved skull is Brigham Young University specimen 17096, a well-preserved skull and skeleton, with a preserved braincase. The specimen was found in Cactus Park Quarry in western Colorado. In 2013, Matthew Mossbrucker and several other authors published an abstract that described a premaxilla and maxilla from Lakes' original quarry in Morrison and referred the material to Apatosaurus ajax. Almost all modern paleontologists agreed with Riggs that the two dinosaurs should be classified together in a single genus. According to the rules of the ICZN (which governs the scientific names of animals), the name Apatosaurus, having been published first, has priority as the official name; Brontosaurus was considered a junior synonym and was therefore long discarded from formal use. Despite this, at least one paleontologistRobert T. Bakkerargued in the 1990s that A.ajax and A.excelsus were in fact sufficiently distinct for the latter to merit a separate genus. In 2015, Emanuel Tschopp, Octávio Mateus, and Roger Benson released a paper on diplodocoid systematics, and proposed that genera could be diagnosed by thirteen differing characters, and species separated based on six. The minimum number for generic separation was chosen based on the fact that A.ajax and A.louisae differ in twelve characters, and Diplodocus carnegiei and D.hallorum differ in eleven characters. Thus, thirteen characters were chosen to validate the separation of genera. The six differing features for specific separation were chosen by counting the number of differing features in separate specimens generally agreed to represent one species, with only one differing character in D.carnegiei and A.louisae, but five differing features in B.excelsus. Therefore, Tschopp etal. argued that Apatosaurus excelsus, originally classified as Brontosaurus excelsus, had enough morphological differences from other species of Apatosaurus that it warranted being reclassified as a separate genus again. The conclusion was based on a comparison of 477 morphological characteristics across 81 different dinosaur individuals. Among the many notable differences are the widerand presumably strongerneck of Apatosaurus species compared to B.excelsus. Other species previously assigned to Apatosaurus, such as Elosaurus parvus and Eobrontosaurus yahnahpin were also reclassified as Brontosaurus. Some features proposed to separate Brontosaurus from Apatosaurus include: posterior dorsal vertebrae with the centrum longer than wide; the scapula rear to the acromial edge and the distal blade being excavated; the acromial edge of the distal scapular blade bearing a rounded expansion; and the ratio of the proximodistal length to transverse breadth of the astragalus 0.55 or greater. Sauropod expert Michael D'Emic pointed out that the criteria chosen were to an extent arbitrary and that they would require abandoning the name Brontosaurus again if newer analyses obtained different results. Mammal paleontologist Donald Prothero criticized the mass media reaction to this study as superficial and premature, concluding that he would keep "Brontosaurus" in quotes and not treat the name as a valid genus. Valid species Many species of Apatosaurus have been designated from scant material. Marsh named as many species as he could, which resulted in many being based upon fragmentary and indistinguishable remains. In 2005, Paul Upchurch and colleagues published a study that analyzed the species and specimen relationships of Apatosaurus. They found that A.louisae was the most basal species, followed by FMNHP25112, and then a polytomy of A.ajax, A.parvus, and A.excelsus. Their analysis was revised and expanded with many additional diplodocid specimens in 2015, which resolved the relationships of Apatosaurus slightly differently, and also supported separating Brontosaurus from Apatosaurus. Apatosaurus ajax was named by Marsh in 1877 after Ajax, a hero from Greek mythology. Marsh designated the incomplete, juvenile skeleton YPM1860 as its holotype. The species is less studied than Brontosaurus and A.louisae, especially because of the incomplete nature of the holotype. In 2005, many specimens in addition to the holotype were found assignable to A.ajax, YPM1840, NSMT-PV 20375, YPM1861, and AMNH460. The specimens date from the late Kimmeridgian to the early Tithonian ages. In 2015, only the A.ajax holotype YPM1860 assigned to the species, with AMNH460 found either to be within Brontosaurus, or potentially its own taxon. However, YPM1861 and NSMT-PV 20375 only differed in a few characteristics, and cannot be distinguished specifically or generically from A.ajax. YPM1861 is the holotype of "Atlantosaurus" immanis, which means it might be a junior synonym of A.ajax. Apatosaurus louisae was named by Holland in 1916, being first known from a partial skeleton that was found in Utah. The holotype is CM3018, with referred specimens including CM3378, CM11162, and LACM52844. The former two consist of a vertebral column; the latter two consist of a skull and a nearly complete skeleton, respectively. Apatosaurus louisae specimens all come from the late Kimmeridgian of Dinosaur National Monument. In 2015, Tschopp etal. found the type specimen of Apatosaurus laticollis to nest closely with CM3018, meaning the former is likely a junior synonym of A.louisae. The cladogram below is the result of an analysis by Tschopp, Mateus, and Benson (2015). The authors analyzed most diplodocid type specimens separately to deduce which specimen belonged to which species and genus. Reassigned species Apatosaurus grandis was named in 1877 by Marsh in the article that described A.ajax. It was briefly described, figured, and diagnosed. Marsh later mentioned it was only provisionally assigned to Apatosaurus when he reassigned it to his new genus Morosaurus in 1878. Since Morosaurus has been considered a synonym of Camarasaurus, C.grandis is the oldest-named species of the latter genus. Apatosaurus excelsus was the original type species of Brontosaurus, first named by Marsh in 1879. Elmer Riggs reclassified Brontosaurus as a synonym of Apatosaurus in 1903, transferring the species B.excelsus to A.excelsus. In 2015, Tschopp, Mateus, and Benson argued that the species was distinct enough to be placed in its own genus, so they reclassified it back into Brontosaurus. Apatosaurus parvus, first described from a juvenile specimen as Elosaurus in 1902 by Peterson and Gilmore, was reassigned to Apatosaurus in 1994, and then to Brontosaurus in 2015. Many other, more mature specimens were assigned to it following the 2015 study. Apatosaurus minimus was originally described as a specimen of Brontosaurus sp. in 1904 by Osborn. In 1917, Henry Mook named it as its own species, A.minimus, for a pair of ilia and their sacrum. In 2012, Mike P. Taylor and Matt J. Wedel published a short abstract describing the material of A. minimus, finding it hard to place among either Diplodocoidea or Macronaria. While it was placed with Saltasaurus in a phylogenetic analysis, it was thought to represent instead some form with convergent features from many groups. The study of Tschopp etal. did find that a camarasaurid position for the taxon was supported, but noted that the position of the taxon was found to be highly variable and there was no clearly more likely position. Apatosaurus alenquerensis was named in 1957 by Albert-Félix de Lapparent and Georges Zbyweski. It was based on post cranial material from Portugal. In 1990, this material was reassigned to Camarasaurus, but in 1998 it was given its own genus, Lourinhasaurus. This was further supported by the findings of Tschopp etal. in 2015, where Lourinhasaurus was found to be sister to Camarasaurus and other camarasaurids. Apatosaurus yahnahpin was named by James Filla and Patrick Redman in 1994. Bakker made A.yahnahpin the type species of a new genus, Eobrontosaurus in 1998, and Tschopp reclassified it as Brontosaurus yahnahpin in 2015. Classification Apatosaurus is a member of the family Diplodocidae, a clade of gigantic sauropod dinosaurs. The family includes some of the longest creatures ever to walk the earth, including Diplodocus, Supersaurus, and Barosaurus. Apatosaurus is sometimes classified in the subfamily Apatosaurinae, which may also include Suuwassea, Supersaurus, and Brontosaurus. Othniel Charles Marsh described Apatosaurus as allied to Atlantosaurus within the now-defunct group Atlantosauridae. In 1878, Marsh raised his family to the rank of suborder, including Apatosaurus, Atlantosaurus, Morosaurus (=Camarasaurus) and Diplodocus. He classified this group within Sauropoda, a group he erected in the same study. In 1903, Elmer S. Riggs said the name Sauropoda would be a junior synonym of earlier names; he grouped Apatosaurus within Opisthocoelia. Sauropoda is still used as the group name. In 2011, John Whitlock published a study that placed Apatosaurus a more basal diplodocid, sometimes less basal than Supersaurus. Cladogram of the Diplodocidae after Tschopp, Mateus, and Benson (2015). Paleobiology It was believed throughout the 19th and early 20th centuries that sauropods like Apatosaurus were too massive to support their own weight on dry land. It was theorized that they lived partly submerged in water, perhaps in swamps. More recent findings do not support this; sauropods are now thought to have been fully terrestrial animals. A study of diplodocid snouts showed that the square snout, large proportion of pits, and fine, subparallel scratches of the teeth of Apatosaurus suggests it was a ground-height, nonselective browser. It may have eaten ferns, cycadeoids, seed ferns, horsetails, and algae. Stevens and Parish (2005) speculate that these sauropods fed from riverbanks on submerged water plants. A 2015 study of the necks of Apatosaurus and Brontosaurus found many differences between them and other diplodocids, and that these variations may have shown that the necks of Apatosaurus and Brontosaurus were used for intraspecific combat. Various uses for the single claw on the forelimb of sauropods have been proposed. One suggestion is that they were used for defense, but their shape and size make this unlikely. It was also possible they were for feeding, but the most probable use for the claw was grasping objects such as tree trunks when rearing. Trackways of sauropods like Apatosaurus show that they may have had a range of around per day, and that they could potentially have reached a top speed of per hour. The slow locomotion of sauropods may be due to their minimal muscling, or to recoil after strides. A trackway of a juvenile has led some to believe that they were capable of bipedalism, though this is disputed. Neck posture Diplodocids like Apatosaurus are often portrayed with their necks held high up in the air, allowing them to browse on tall trees. Some studies state diplodocid necks were less flexible than previously believed, because the structure of the neck vertebrae would not have allowed the neck to bend far upward, and that sauropods like Apatosaurus were adapted to low browsing or ground feeding. Other studies by Taylor find that all tetrapods appear to hold their necks at the maximum possible vertical extension when in a normal, alert posture; they argue the same would hold true for sauropods barring any unknown, unique characteristics that set the soft tissue anatomy of their necks apart from that of other animals. Apatosaurus, like Diplodocus, would have held its neck angled upward with the head pointing downward in a resting posture. Kent Stevens and Michael Parrish (1999 and 2005) state Apatosaurus had a great feeding range; its neck could bend into a U-shape laterally. The neck's range of movement would have also allowed the head to feed at the level of the feet. Matthew Cobley et al. (2013) dispute this, finding that large muscles and cartilage would have limited movement of the neck. They state the feeding ranges for sauropods like Diplodocus were smaller than previously believed, and the animals may have had to move their whole bodies around to better access areas where they could browse vegetation. As such, they might have spent more time foraging to meet their minimum energy needs. The conclusions of Cobley etal. are disputed by Taylor, who analyzed the amount and positioning of intervertebral cartilage to determine the flexibility of the neck of Apatosaurus and Diplodocus. He found that the neck of Apatosaurus was very flexible. Physiology Given the large body mass and long neck of sauropods like Apatosaurus, physiologists have encountered problems determining how these animals breathed. Beginning with the assumption that, like crocodilians, Apatosaurus did not have a diaphragm, the dead-space volume (the amount of unused air remaining in the mouth, trachea, and air tubes after each breath) has been estimated at about for a specimen. Paladino calculates its tidal volume (the amount of air moved in or out during a single breath) at with an avian respiratory system, if mammalian, and if reptilian. On this basis, its respiratory system would likely have been parabronchi, with multiple pulmonary air sacs as in avian lungs, and a flow-through lung. An avian respiratory system would need a lung volume of about compared with a mammalian requirement of , which would exceed the space available. The overall thoracic volume of Apatosaurus has been estimated at , allowing for a , four-chambered heart and a lung capacity. That would allow about for the necessary tissue. Evidence for the avian system in Apatosaurus and other sauropods is also present in the pneumaticity of the vertebrae. Though this plays a role in reducing the weight of the animal, Wedel (2003) states they are also likely connected to air sacs, as in birds. James Spotila et al. (1991) concludes that the large body size of sauropods would have made them unable to maintain high metabolic rates because they would not have been able to release enough heat. They assumed sauropods had a reptilian respiratory system. Wedel says that an avian system would have allowed it to dump more heat. Some scientists state that the heart would have had trouble sustaining sufficient blood pressure to oxygenate the brain. Others suggest that the near-horizontal posture of the head and neck would have eliminated the problem of supplying blood to the brain because it would not have been elevated. James Farlow (1987) calculates that an Apatosaurus-sized dinosaur about would have possessed of fermentation contents. Assuming Apatosaurus had an avian respiratory system and a reptilian resting-metabolism, Frank Paladino etal. (1997) estimate the animal would have needed to consume only about of water per day. Growth A 1999 microscopic study of Apatosaurus and Brontosaurus bones concluded the animals grew rapidly when young and reached near-adult sizes in about 10years. In 2008, a study on the growth rates of sauropods was published by Thomas Lehman and Holly Woodward. They said that by using growth lines and length-to-mass ratios, Apatosaurus would have grown to 25t (25 long tons; 28 short tons) in 15years, with growth peaking at in a single year. An alternative method, using limb length and body mass, found Apatosaurus grew per year, and reached its full mass before it was about 70years old. These estimates have been called unreliable because the calculation methods are not sound; old growth lines would have been obliterated by bone remodelling. One of the first identified growth factors of Apatosaurus was the number of sacral vertebrae, which increased to five by the time of the creature's maturity. This was first noted in 1903 and again in 1936. Long-bone histology enables researchers to estimate the age that a specific individual reached. A study by Eva Griebeler etal. (2013) examined long-bone histological data and concluded the Apatosaurus sp.SMA0014 weighed , reached sexual maturity at 21years, and died aged 28. The same growth model indicated Apatosaurus sp.BYU 601–17328 weighed , reached sexual maturity at 19years, and died aged 31. Juveniles Compared with most sauropods, a relatively large amount of juvenile material is known from Apatosaurus. Multiple specimens in the OMNH are from juveniles of an undetermined species of Apatosaurus; this material includes partial shoulder and pelvic girdles, some vertebrae, and limb bones. OMNH juvenile material is from at least two different age groups and based on overlapping bones likely comes from more than three individuals. The specimens exhibit features that distinguish Apatosaurus from its relatives, and thus likely belong to the genus. Juvenile sauropods tend to have proportionally shorter necks and tails, and a more pronounced forelimb-hindlimb disparity than found in adult sauropods. Tail An article published in 1997 reported research of the mechanics of Apatosaurus tails by Nathan Myhrvold and paleontologist Philip J. Currie. Myhrvold carried out a computer simulation of the tail, which in diplodocids like Apatosaurus was a very long, tapering structure resembling a bullwhip. This computer modeling suggested diplodocids were capable of producing a whiplike cracking sound of over 200 decibels, comparable to the volume of a cannon being fired. A pathology has been identified on the tail of Apatosaurus, caused by a growth defect. Two caudal vertebrae are seamlessly fused along the entire articulating surface of the bone, including the arches of the neural spines. This defect might have been caused by the lack or inhibition of the substance that forms intervertebral disks or joints. It has been proposed that the whips could have been used in combat and defense, but the tails of diplodocids were quite light and narrow compared to Shunosaurus and mamenchisaurids, and thus to injure another animal with the tail would severely injure the tail itself. More recently, Baron (2020) considers the use of the tail as a bullwhip unlikely because of the potentially catastrophic muscle and skeletal damage such speeds could cause on the large and heavy tail. Instead, he proposes that the tails might have been used as a tactile organ to keep in touch with the individuals behind and on the sides in a group while migrating, which could have augmented cohesion and allowed communication among individuals while limiting more energetically demanding activities like stopping to search for dispersed individuals, turning to visually check on individuals behind, or communicating vocally. Paleoecology The Morrison Formation is a sequence of shallow marine and alluvial sediments which, according to radiometric dating, dates from between 156.3mya at its base, and 146.8mya at the top, placing it in the late Oxfordian, Kimmeridgian, and early Tithonian stages of the Late Jurassic period. This formation is interpreted as originating in a locally semiarid environment with distinct wet and dry seasons. The Morrison Basin, where dinosaurs lived, stretched from New Mexico to Alberta and Saskatchewan; it was formed when the precursors to the Front Range of the Rocky Mountains started pushing up to the west. The deposits from their east-facing drainage basins were carried by streams and rivers and deposited in swampy lowlands, lakes, river channels, and floodplains. This formation is similar in age to the Lourinhã Formation in Portugal and the Tendaguru Formation in Tanzania. Apatosaurus was the second most common sauropod in the Morrison Formation ecosystem, after Camarasaurus. Apatosaurus may have been more solitary than other Morrison Formation dinosaurs. Fossils of the genus have only been found in the upper levels of the formation. Those of Apatosaurus ajax are known exclusively from the upper Brushy Basin Member, about 152–151 mya. A.louisae fossils are rare, known only from one site in the upper Brushy Basin Member; they date to the late Kimmeridgian stage, about 151mya. Additional Apatosaurus remains are known from similarly aged or slightly younger rocks, but they have not been identified as any particular species, and thus may instead belong to Brontosaurus. The Morrison Formation records a time when the local environment was dominated by gigantic sauropod dinosaurs. Dinosaurs known from the Morrison Formation include the theropods Allosaurus, Ceratosaurus, Ornitholestes, Saurophaganax, and Torvosaurus; the sauropods Brontosaurus, Brachiosaurus, Camarasaurus, and Diplodocus; and the ornithischians Camptosaurus, Dryosaurus, and Stegosaurus. Apatosaurus is commonly found at the same sites as Allosaurus, Camarasaurus, Diplodocus, and Stegosaurus. Allosaurus accounted for 70–75% of theropod specimens and was at the top trophic level of the Morrison food web. Many of the dinosaurs of the Morrison Formation are of the same genera as those seen in Portuguese rocks of the Lourinhã Formationmainly Allosaurus, Ceratosaurus, and Torvosaurusor have a close counterpartBrachiosaurus and Lusotitan, Camptosaurus and Draconyx, and Apatosaurus and Dinheirosaurus. Other vertebrates that are known to have shared this paleo-environment include ray-finned fishes, frogs, salamanders, turtles, sphenodonts, lizards, terrestrial and aquatic crocodylomorphans, and several species of pterosaur. Shells of bivalves and aquatic snails are also common. The flora of the period has been evidenced in fossils of green algae, fungi, mosses, horsetails, cycads, ginkgoes, and several families of conifers. Vegetation varied from river-lining forests of tree ferns with fern understory (gallery forests), to fern savannas with occasional trees such as the Araucaria-like conifer Brachyphyllum. References External links Batuman, Elif. Brontosaurus Rising (April 2015), The New Yorker Krystek, Lee. "Whatever Happened to the Brontosaurus?" UnMuseum (Museum of Unnatural Mystery), 2002. Taylor, Mike. "Why is 'Brontosaurus' now called Apatosaurus?" MikeTaylor.org.uk, June 28, 2004. Apatosaurinae Dinosaurs of the Morrison Formation Fossil taxa described in 1877 Late Jurassic dinosaurs of North America Paleontology in Colorado Paleontology in Wyoming Taxa named by Othniel Charles Marsh

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

Allosaurus

Allosaurus () is a genus of large carnosaurian theropod dinosaur that lived 155 to 145 million years ago during the Late Jurassic epoch (Kimmeridgian to late Tithonian). The name "Allosaurus" means "different lizard" alluding to its unique (at the time of its discovery) concave vertebrae. It is derived from the Greek () ("different, other") and () ("lizard / generic reptile"). The first fossil remains that could definitively be ascribed to this genus were described in 1877 by paleontologist Othniel Charles Marsh. As one of the first well-known theropod dinosaurs, it has long attracted attention outside of paleontological circles. Allosaurus was a large bipedal predator. Its skull was light, robust and equipped with dozens of sharp, serrated teeth. It averaged in length for A. fragilis, with the largest specimens estimated as being long. Relative to the large and powerful hindlimbs, its three-fingered forelimbs were small, and the body was balanced by a long and heavily muscled tail. It is classified as an allosaurid, a type of carnosaurian theropod dinosaur. The genus has a complicated taxonomy, and includes at least three valid species, the best known of which is A. fragilis. The bulk of Allosaurus remains have come from North America's Morrison Formation, with material also known from Portugal. It was known for over half of the 20th century as Antrodemus, but a study of the abundant remains from the Cleveland-Lloyd Dinosaur Quarry brought the name "Allosaurus" back to prominence and established it as one of the best-known dinosaurs. As the most abundant large predator in the Morrison Formation, Allosaurus was at the top of the food chain, probably preying on contemporaneous large herbivorous dinosaurs, and perhaps other predators. Potential prey included ornithopods, stegosaurids, and sauropods. Some paleontologists interpret Allosaurus as having had cooperative social behavior, and hunting in packs, while others believe individuals may have been aggressive toward each other, and that congregations of this genus are the result of lone individuals feeding on the same carcasses. Discovery and history Early discoveries and research The discovery and early study of Allosaurus is complicated by the multiplicity of names coined during the Bone Wars of the late 19th century. The first described fossil in this history was a bone obtained secondhand by Ferdinand Vandeveer Hayden in 1869. It came from Middle Park, near Granby, Colorado, probably from Morrison Formation rocks. The locals had identified such bones as "petrified horse hoofs". Hayden sent his specimen to Joseph Leidy, who identified it as half of a tail vertebra, and tentatively assigned it to the European dinosaur genus Poekilopleuron as Poicilopleuron valens. He later decided it deserved its own genus, Antrodemus. Allosaurus itself is based on YPM 1930, a small collection of fragmentary bones including parts of three vertebrae, a rib fragment, a tooth, a toe bone, and, most useful for later discussions, the shaft of the right humerus (upper arm). Othniel Charles Marsh gave these remains the formal name Allosaurus fragilis in 1877. Allosaurus comes from the Greek /, meaning "strange" or "different" and /, meaning "lizard" or "reptile". It was named 'different lizard' because its vertebrae were different from those of other dinosaurs known at the time of its discovery. The species epithet fragilis is Latin for "fragile", referring to lightening features in the vertebrae. The bones were collected from the Morrison Formation of Garden Park, north of Cañon City. Marsh and Edward Drinker Cope, who were in scientific competition with each other, went on to coin several other genera based on similarly sparse material that would later figure in the taxonomy of Allosaurus. These include Marsh's Creosaurus and Labrosaurus, and Cope's Epanterias. In their haste, Cope and Marsh did not always follow up on their discoveries (or, more commonly, those made by their subordinates). For example, after the discovery by Benjamin Mudge of the type specimen of Allosaurus in Colorado, Marsh elected to concentrate work in Wyoming; when work resumed at Garden Park in 1883, M. P. Felch found an almost complete Allosaurus and several partial skeletons. In addition, one of Cope's collectors, H. F. Hubbell, found a specimen in the Como Bluff area of Wyoming in 1879, but apparently did not mention its completeness, and Cope never unpacked it. Upon unpacking in 1903 (several years after Cope had died), it was found to be one of the most complete theropod specimens then known, and in 1908 the skeleton, now cataloged as AMNH 5753, was put on public view. This is the well-known mount poised over a partial Apatosaurus skeleton as if scavenging it, illustrated as such by Charles R. Knight. Although notable as the first free-standing mount of a theropod dinosaur, and often illustrated and photographed, it has never been scientifically described. The multiplicity of early names complicated later research, with the situation compounded by the terse descriptions provided by Marsh and Cope. Even at the time, authors such as Samuel Wendell Williston suggested that too many names had been coined. For example, Williston pointed out in 1901 that Marsh had never been able to adequately distinguish Allosaurus from Creosaurus. The most influential early attempt to sort out the convoluted situation was produced by Charles W. Gilmore in 1920. He came to the conclusion that the tail vertebra named Antrodemus by Leidy was indistinguishable from those of Allosaurus, and Antrodemus thus should be the preferred name because, as the older name, it had priority. Antrodemus became the accepted name for this familiar genus for over 50 years, until James Henry Madsen published on the Cleveland-Lloyd specimens and concluded that Allosaurus should be used because Antrodemus was based on material with poor, if any, diagnostic features and locality information (for example, the geological formation that the single bone of Antrodemus came from is unknown). "Antrodemus" has been used informally for convenience when distinguishing between the skull Gilmore restored and the composite skull restored by Madsen. Cleveland-Lloyd discoveries Although sporadic work at what became known as the Cleveland-Lloyd Dinosaur Quarry in Emery County, Utah, had taken place as early as 1927, and the fossil site itself described by William L. Stokes in 1945, major operations did not begin there until 1960. Under a cooperative effort involving nearly 40 institutions, thousands of bones were recovered between 1960 and 1965, led by James Henry Madsen. The quarry is notable for the predominance of Allosaurus remains, the condition of the specimens, and the lack of scientific resolution on how it came to be. The majority of bones belong to the large theropod Allosaurus fragilis (it is estimated that the remains of at least 46 A. fragilis have been found there, out of at a minimum 73 dinosaurs), and the fossils found there are disarticulated and well-mixed. Nearly a dozen scientific papers have been written on the taphonomy of the site, suggesting numerous mutually exclusive explanations for how it may have formed. Suggestions have ranged from animals getting stuck in a bog, to becoming trapped in deep mud, to falling victim to drought-induced mortality around a waterhole, to getting trapped in a spring-fed pond or seep. Regardless of the actual cause, the great quantity of well-preserved Allosaurus remains has allowed this genus to be known in detail, making it among the best-known theropods. Skeletal remains from the quarry pertain to individuals of almost all ages and sizes, from less than to long, and the disarticulation is an advantage for describing bones usually found fused. Due to being one of Utah's two fossil quarries where many Allosaurus specimens have been discovered, Allosaurus was designated as the state fossil of Utah in 1988. Recent work: 1980s–present The period since Madsen's monograph has been marked by a great expansion in studies dealing with topics concerning Allosaurus in life (paleobiological and paleoecological topics). Such studies have covered topics including skeletal variation, growth, skull construction, hunting methods, the brain, and the possibility of gregarious living and parental care. Reanalysis of old material (particularly of large 'allosaur' specimens), new discoveries in Portugal, and several very complete new specimens have also contributed to the growing knowledge base. "Big Al" and "Big Al II" In 1991, "Big Al" (MOR 693), a 95% complete, partially articulated specimen of Allosaurus was discovered. It measured about 8 meters (about 26 ft) in length. MOR 693 was excavated near Shell, Wyoming, by a joint Museum of the Rockies and University of Wyoming Geological Museum team. This skeleton was discovered by a Swiss team, led by Kirby Siber. Chure and Loewen in 2020 identified the individual as a representative of the species Allosaurus jimmadseni. In 1996, the same team discovered a second Allosaurus, "Big Al II". This specimen, the best preserved skeleton of its kind to date, is also referred to Allosaurus jimmadseni. The completeness, preservation, and scientific importance of this skeleton gave "Big Al" its name; the individual itself was below the average size for Allosaurus fragilis, and was a subadult estimated at only 87% grown. The specimen was described by Breithaupt in 1996. Nineteen of its bones were broken or showed signs of infection, which may have contributed to "Big Al's" death. Pathologic bones included five ribs, five vertebrae, and four bones of the feet; several damaged bones showed osteomyelitis, a bone infection. A particular problem for the living animal was infection and trauma to the right foot that probably affected movement and may have also predisposed the other foot to injury because of a change in gait. Al had an infection on the first phalanx on the third toe that was afflicted by an involucrum. The infection was long-lived, perhaps up to six months. Big Al Two is also known to have multiple injuries. Species Six species of Allosaurus have been named: A. amplus, A. atrox, A. europaeus, the type species A. fragilis, A. jimmadseni and A. lucasi. Among these, Daniel Chure and Mark Loewen in 2020 only recognized the species A. fragilis, A. europaeus, and the newly-named A. jimmadseni as being valid species. However, A. europaeus does not show any unique characters compared to the North American species, so a reevaluation of its validity is required. A. fragilis is the type species and was named by Marsh in 1877. It is known from the remains of at least 60 individuals, all found in the Kimmeridgian–Tithonian Upper Jurassic-age Morrison Formation of the United States, spread across the states of Colorado, Montana, New Mexico, Oklahoma, South Dakota, Utah, and Wyoming. Details of the humerus (upper arm) of A. fragilis have been used as diagnostic among Morrison theropods, but A. jimmadseni indicates that this is no longer the case at the species level. A. jimmadseni has been scientifically described based on two nearly complete skeletons. The first specimen to wear the identification was unearthed in Dinosaur National Monument in northeastern Utah, with the original "Big Al" individual subsequently recognized as belonging to the same species. This species differs from A. fragilis in several anatomical details, including a jugal or cheekbone with a straight lower margin. Fossils are confined to the Salt Wash Member of the Morrison Formation, with A. fragilis only found in the higher Brushy Basin Member. A. fragilis, A. jimmadseni, A. amplus, and A. lucasi are all known from remains discovered in the Kimmeridgian–Tithonian Upper Jurassic-age Morrison Formation of the United States, spread across the states of Colorado, Montana, New Mexico, Oklahoma, South Dakota, Utah and Wyoming. A. fragilis is regarded as the most common, known from the remains of at least 60 individuals. For a while in the late 1980s and early 1990s, it was common to recognize A. fragilis as the short-snouted species, with the long-snouted taxon being A. atrox; however, subsequent analysis of specimens from the Cleveland-Lloyd Dinosaur Quarry, Como Bluff, and Dry Mesa Quarry showed that the differences seen in the Morrison Formation material could be attributed to individual variation. A study of skull elements from the Cleveland-Lloyd site found wide variation between individuals, calling into question previous species-level distinctions based on such features as the shape of the lacrimal horns, and the proposed differentiation of A. jimmadseni based on the shape of the jugal. A. europaeus was found in the Kimmeridgian-age Porto Novo Member of the Lourinhã Formation, but may be the same as A. fragilis. Allosaurus material from Portugal was first reported in 1999 on the basis of MHNUL/AND.001, a partial skeleton including a quadrate, vertebrae, ribs, gastralia, chevrons, part of the hips, and hindlimbs. This specimen was assigned to A. fragilis, but the subsequent discovery of a partial skull and neck (ML 415) near Lourinhã, in the Kimmeridgian-age Porto Novo Member of the Lourinhã Formation, spurred the naming of the new species A. europaeus by Octávio Mateus and colleagues. The species appeared earlier in the Jurassic than A. fragilis and differs from other species of Allosaurus in cranial details. However, more material may show it to be A. fragilis, as originally described. The issue of species and potential synonyms is complicated by the type specimen of Allosaurus fragilis (catalog number YPM 1930) being extremely fragmentary, consisting of a few incomplete vertebrae, limb bone fragments, rib fragments, and a tooth. Because of this, several scientists have interpreted the type specimen as potentially dubious, and thus the genus Allosaurus itself or at least the species A. fragilis would be a nomen dubium ("dubious name", based on a specimen too incomplete to compare to other specimens or to classify). To address this situation, Gregory S. Paul and Kenneth Carpenter (2010) submitted a petition to the ICZN to have the name "A. fragilis" officially transferred to the more complete specimen USNM4734 (as a neotype). Synonyms Creosaurus, Epanterias, and Labrosaurus are regarded as junior synonyms of Allosaurus. Most of the species that are regarded as synonyms of A. fragilis, or that were misassigned to the genus, are obscure and were based on scrappy remains. One exception is Labrosaurus ferox, named in 1884 by Marsh for an oddly formed partial lower jaw, with a prominent gap in the tooth row at the tip of the jaw, and a rear section greatly expanded and turned down. Later researchers suggested that the bone was pathologic, showing an injury to the living animal, and that part of the unusual form of the rear of the bone was due to plaster reconstruction. It is now regarded as an example of A. fragilis. In his 1988 book, Predatory Dinosaurs of the World, the freelance dinosaurologist Gregory Paul proposed that A. fragilis had tall pointed horns and a slender build compared to a postulated second species A. atrox, and was not a different sex due to rarity. Allosaurus atrox was originally named by Marsh in 1878 as the type species of its own genus, Creosaurus, and is based on YPM 1890, an assortment of bones including a couple of pieces of the skull, portions of nine tail vertebrae, two hip vertebrae, an ilium, and ankle and foot bones. Although the idea of two common Morrison allosaur species was followed in some semi-technical and popular works, the 2000 thesis on Allosauridae noted that Charles Gilmore mistakenly reconstructed USNM 4734 as having a shorter skull than the specimens referred by Paul to atrox, refuting supposed differences between USNM 4734 and putative A. atrox specimens like DINO 2560, AMNH 600, and AMNH 666. "Allosaurus agilis", seen in Zittel, 1887, and Osborn, 1912, is a typographical error for A. fragilis. "Allosaurus ferox" is a typographical error by Marsh for A. fragilis in a figure caption for the partial skull YPM 1893, and YPM 1893 has been treated as a specimen of A fragilis. Likewise, "Labrosaurus fragilis" is a typographical error by Marsh (1896) for Labrosaurus ferox. "A. whitei" is a nomen nudum coined by Pickering in 1996 for the complete Allosaurus specimens that Paul referred to A. atrox. "Madsenius" was coined by David Lambert in 1990, for remains from Dinosaur National Monument assigned to Allosaurus or Creosaurus (a synonym of Allosaurus), and was to be described by paleontologist Bob Bakker as "Madsenius trux". However, "Madsenius" is now seen as yet another synonym of Allosaurus because Bakker's action was predicated upon the false assumption of USNM 4734 being distinct from long-snouted Allosaurus due to errors in Gilmore's (1920) reconstruction of USNM 4734. "Wyomingraptor" was informally coined by Bakker for allosaurid remains from the Morrison Formation of the Late Jurassic. The remains unearthed are labeled as Allosaurus and are housed in the Tate Geological Museum. However, there has been no official description of the remains and "Wyomingraptor" has been dismissed as a nomen nudum, with the remains referable to Allosaurus. Formerly assigned species and fossils Several species initially classified within or referred to Allosaurus do not belong within the genus. A. medius was named by Marsh in 1888 for various specimens from the Early Cretaceous Arundel Formation of Maryland, although most of the remains were removed by Richard Swann Lull to the new ornithopod species Dryosaurus grandis, except for a tooth. Gilmore considered the tooth nondiagnostic but transferred it to Dryptosaurus, as D. medius. The referral was not accepted in the most recent review of basal tetanurans, and Allosaurus medius was simply listed as a dubious species of theropod. It may be closely related to Acrocanthosaurus. Allosaurus valens is a new combination for Antrodemus valens used by Friedrich von Huene in 1932; Antrodemus valens itself may also pertain to Allosaurus fragilis, as Gilmore suggested in 1920. A. lucaris, another Marsh name, was given to a partial skeleton in 1878. He later decided it warranted its own genus, Labrosaurus, but this has not been accepted, and A. lucaris is also regarded as another specimen of A. fragilis. Allosaurus lucaris, is known mostly from vertebrae, sharing characters with Allosaurus. Paul and Carpenter stated that the type specimen of this species, YPM 1931, was from a younger age than Allosaurus, and might represent a different genus. However, they found that the specimen was undiagnostic, and thus A. lucaris was a nomen dubium. Allosaurus sibiricus was described in 1914 by A. N. Riabinin on the basis of a bone, later identified as a partial fourth metatarsal, from the Early Cretaceous of Buryatia, Russia. It was transferred to Chilantaisaurus in 1990, but is now considered a nomen dubium indeterminate beyond Theropoda. Allosaurus meriani was a new combination by George Olshevsky for Megalosaurus meriani Greppin, 1870, based on a tooth from the Late Jurassic of Switzerland. However, a recent overview of Ceratosaurus included it in Ceratosaurus sp. Apatodon mirus, based on a scrap of vertebra Marsh first thought to be a mammalian jaw, has been listed as a synonym of Allosaurus fragilis. However, it was considered indeterminate beyond Dinosauria by Chure, and Mickey Mortimer believes that the synonymy of Apatodon with Allosaurus was due to correspondence to Ralph Molnar by John McIntosh, whereby the latter reportedly found a paper saying that Othniel Charles Marsh admitted that the Apatodon holotype was actually an allosaurid dorsal vertebra. A. amplexus was named by Gregory S. Paul for giant Morrison allosaur remains, and included in his conception Saurophagus maximus (later Saurophaganax). A. amplexus was originally coined by Cope in 1878 as the type species of his new genus Epanterias, and is based on what is now AMNH 5767, parts of three vertebrae, a coracoid, and a metatarsal. Following Paul's work, this species has been accepted as a synonym of A. fragilis. A 2010 study by Paul and Kenneth Carpenter, however, indicates that Epanterias is temporally younger than the A. fragilis type specimen, so it is a separate species at minimum. A. maximus was a new combination by David K. Smith for Chure's Saurophaganax maximus, a taxon created by Chure in 1995 for giant allosaurid remains from the Morrison of Oklahoma. These remains had been known as Saurophagus, but that name was already in use, leading Chure to propose a substitute. Smith, in his 1998 analysis of variation, concluded that S. maximus was not different enough from Allosaurus to be a separate genus, but did warrant its own species, A. maximus. This reassignment was rejected in a review of basal tetanurans. There are also several species left over from the synonymizations of Creosaurus and Labrosaurus with Allosaurus. Creosaurus potens was named by Lull in 1911 for a vertebra from the Early Cretaceous of Maryland. It is now regarded as a dubious theropod. Labrosaurus stechowi, described in 1920 by Janensch based on isolated Ceratosaurus-like teeth from the Tendaguru beds of Tanzania, was listed by Donald F. Glut as a species of Allosaurus, is now considered a dubious ceratosaurian related to Ceratosaurus. L. sulcatus, named by Marsh in 1896 for a Morrison theropod tooth, which like L. stechowi is now regarded as a dubious Ceratosaurus-like ceratosaur. A. tendagurensis was named in 1925 by Werner Janensch for a partial shin (MB.R.3620) found in the Kimmeridgian-age Tendaguru Formation in Mtwara, Tanzania. Although tabulated as a tentatively valid species of Allosaurus in the second edition of the Dinosauria, subsequent studies place it as indeterminate beyond Tetanurae, either a carcharodontosaurian or megalosaurid. Although obscure, it was a large theropod, possibly around 10 meters long (33 ft) and 2.5 metric tons (2.8 short tons) in weight. Kurzanov and colleagues in 2003 designated six teeth from Siberia as Allosaurus sp. (meaning the authors found the specimens to be most like those of Allosaurus, but did not or could not assign a species to them). They were reclassified as an indeterminate theropod. Also, reports of Allosaurus in Shanxi, China go back to at least 1982. These were interpreted as Torvosaurus remains in 2012. An astragalus (ankle bone) thought to belong to a species of Allosaurus was found at Cape Paterson, Victoria in Early Cretaceous beds in southeastern Australia. It was thought to provide evidence that Australia was a refugium for animals that had gone extinct elsewhere. This identification was challenged by Samuel Welles, who thought it more resembled that of an ornithomimid, but the original authors defended their identification. With fifteen years of new specimens and research to look at, Daniel Chure reexamined the bone and found that it was not Allosaurus, but could represent an allosauroid. Similarly, Yoichi Azuma and Phil Currie, in their description of Fukuiraptor, noted that the bone closely resembled that of their new genus. This specimen is sometimes referred to as "Allosaurus robustus", an informal museum name. It may have belonged to something similar to, or the same as, Australovenator, or it may represent an abelisaur. Description Allosaurus was a typical large theropod, having a massive skull on a short neck, a long, slightly sloping tail, and reduced forelimbs. Allosaurus fragilis, the best-known species, had an average length of and mass of , with the largest definitive Allosaurus specimen (AMNH 680) estimated at long, with an estimated weight of . In his 1976 monograph on Allosaurus, James H. Madsen mentioned a range of bone sizes which he interpreted to show a maximum length of . As with dinosaurs in general, weight estimates are debatable, and since 1980 have ranged between , , and approximately for modal adult weight (not maximum). John Foster, a specialist on the Morrison Formation, suggests that is reasonable for large adults of A. fragilis, but that is a closer estimate for individuals represented by the average-sized thigh bones he has measured. Using the subadult specimen nicknamed "Big Al", since assigned to the species Allosaurus jimmadseni, researchers using computer modelling arrived at a best estimate of for the individual, but by varying parameters they found a range from approximately to approximately . A. europaeus has been measured up to in length and in body mass. Several gigantic specimens have been attributed to Allosaurus, but may in fact belong to other genera. The closely related genus Saurophaganax (OMNH 1708) reached perhaps in length, and its single species has sometimes been included in the genus Allosaurus as Allosaurus maximus, though recent studies support it as a separate genus. Another potential specimen of Allosaurus, once assigned to the genus Epanterias (AMNH 5767), may have measured in length. A more recent discovery is a partial skeleton from the Peterson Quarry in Morrison rocks of New Mexico; this large allosaurid may be another individual of Saurophaganax. David K. Smith, examining Allosaurus fossils by quarry, found that the Cleveland-Lloyd Dinosaur Quarry (Utah) specimens are generally smaller than those from Como Bluff (Wyoming) or Brigham Young University's Dry Mesa Quarry (Colorado), but the shapes of the bones themselves did not vary between the sites. A later study by Smith incorporating Garden Park (Colorado) and Dinosaur National Monument (Utah) specimens found no justification for multiple species based on skeletal variation; skull variation was most common and was gradational, suggesting individual variation was responsible. Further work on size-related variation again found no consistent differences, although the Dry Mesa material tended to clump together on the basis of the astragalus, an ankle bone. Kenneth Carpenter, using skull elements from the Cleveland-Lloyd site, found wide variation between individuals, calling into question previous species-level distinctions based on such features as the shape of the horns, and the proposed differentiation of A. jimmadseni based on the shape of the jugal. A study published by Motani et al., in 2020 suggests that Allosaurus was also sexually dimorphic in the width of the femur's head against its length. Skull The skull and teeth of Allosaurus were modestly proportioned for a theropod of its size. Paleontologist Gregory S. Paul gives a length of for a skull belonging to an individual he estimates at long. Each premaxilla (the bones that formed the tip of the snout) held five teeth with D-shaped cross-sections, and each maxilla (the main tooth-bearing bones in the upper jaw) had between 14 and 17 teeth; the number of teeth does not exactly correspond to the size of the bone. Each dentary (the tooth-bearing bone of the lower jaw) had between 14 and 17 teeth, with an average count of 16. The teeth became shorter, narrower, and more curved toward the back of the skull. All of the teeth had saw-like edges. They were shed easily, and were replaced continually, making them common fossils. Its skull was light, robust and equipped with dozens of sharp, serrated teeth. The skull had a pair of horns above and in front of the eyes. These horns were composed of extensions of the lacrimal bones, and varied in shape and size. There were also lower paired ridges running along the top edges of the nasal bones that led into the horns. The horns were probably covered in a keratin sheath and may have had a variety of functions, including acting as sunshades for the eyes, being used for display, and being used in combat against other members of the same species (although they were fragile). There was a ridge along the back of the skull roof for muscle attachment, as is also seen in tyrannosaurids. Inside the lacrimal bones were depressions that may have held glands, such as salt glands. Within the maxillae were sinuses that were better developed than those of more basal theropods such as Ceratosaurus and Marshosaurus; they may have been related to the sense of smell, perhaps holding something like Jacobson's organs. The roof of the braincase was thin, perhaps to improve thermoregulation for the brain. The skull and lower jaws had joints that permitted motion within these units. In the lower jaws, the bones of the front and back halves loosely articulated, permitting the jaws to bow outward and increasing the animal's gape. The braincase and frontals may also have had a joint. Postcranial skeleton Allosaurus had nine vertebrae in the neck, 14 in the back, and five in the sacrum supporting the hips. The number of tail vertebrae is unknown and varied with individual size; James Madsen estimated about 50, while Gregory S. Paul considered that to be too many and suggested 45 or less. There were hollow spaces in the neck and anterior back vertebrae. Such spaces, which are also found in modern theropods (that is, the birds), are interpreted as having held air sacs used in respiration. The rib cage was broad, giving it a barrel chest, especially in comparison to less derived theropods like Ceratosaurus. Allosaurus had gastralia (belly ribs), but these are not common findings, and they may have ossified poorly. In one published case, the gastralia show evidence of injury during life. A furcula (wishbone) was also present, but has only been recognized since 1996; in some cases furculae were confused with gastralia. The ilium, the main hip bone, was massive, and the pubic bone had a prominent foot that may have been used for both muscle attachment and as a prop for resting the body on the ground. Madsen noted that in about half of the individuals from the Cleveland-Lloyd Dinosaur Quarry, independent of size, the pubes had not fused to each other at their foot ends. He suggested that this was a sexual characteristic, with females lacking fused bones to make egg-laying easier. This proposal has not attracted further attention, however. The forelimbs of Allosaurus were short in comparison to the hindlimbs (only about 35% the length of the hindlimbs in adults) and had three fingers per hand, tipped with large, strongly curved and pointed claws. The arms were powerful, and the forearm was somewhat shorter than the upper arm (1:1.2 ulna/humerus ratio). The wrist had a version of the semilunate carpal also found in more derived theropods like maniraptorans. Of the three fingers, the innermost (or thumb) was the largest, and diverged from the others. The phalangeal formula is 2-3-4-0-0, meaning that the innermost finger (phalange) has two bones, the next has three, and the third finger has four. The legs were not as long or suited for speed as those of tyrannosaurids, and the claws of the toes were less developed and more hoof-like than those of earlier theropods. Each foot had three weight-bearing toes and an inner dewclaw, which Madsen suggested could have been used for grasping in juveniles. There was also what is interpreted as the splint-like remnant of a fifth (outermost) metatarsal, perhaps used as a lever between the Achilles tendon and foot. Skin Skin impressions from Allosaurus have been described. One impression, from a juvenile specimen, measures 30 cm² and is associated with the anterior dorsal ribs/pectoral region. The impression show small scales measuring 1-3 mm in diameter. A large skin impression from the "Big Al Two" specimen, associated with the base of the tail, measures 20 cm x 20 cm, and show large scales measuring up to 2 cm in diameter. However it has been noted that these scales are more similar to those of sauropods, and due to the presence of non-theropod remains associated with the tail of "Big Al Two" there is a possibility that this skin impression is not from Allosaurus. Another Allosaurus fossil feature a skin impression from the mandible, showing scales measuring 1-2 mm in diameter. The same fossil also preserves skin impressions from the ventral side of the neck, showing broad scutes. A small skin impression from an Allosaurus skull has been reported, but never described. Classification Allosaurus was an allosaurid, a member of a family of large theropods within the larger group Carnosauria. The family name Allosauridae was created for this genus in 1878 by Othniel Charles Marsh, but the term was largely unused until the 1970s in favor of Megalosauridae, another family of large theropods that eventually became a wastebasket taxon. This, along with the use of Antrodemus for Allosaurus during the same period, is a point that needs to be remembered when searching for information on Allosaurus in publications that predate James Madsen's 1976 monograph. Major publications using the name "Megalosauridae" instead of "Allosauridae" include Gilmore, 1920, von Huene, 1926, Romer, 1956 and 1966, Steel, 1970, and Walker, 1964. Following the publication of Madsen's influential monograph, Allosauridae became the preferred family assignment, but it too was not strongly defined. Semi-technical works used Allosauridae for a variety of large theropods, usually those that were larger and better-known than megalosaurids. Typical theropods that were thought to be related to Allosaurus included Indosaurus, Piatnitzkysaurus, Piveteausaurus, Yangchuanosaurus, Acrocanthosaurus, Chilantaisaurus, Compsosuchus, Stokesosaurus, and Szechuanosaurus. Given modern knowledge of theropod diversity and the advent of cladistic study of evolutionary relationships, none of these theropods is now recognized as an allosaurid, although several, like Acrocanthosaurus and Yangchuanosaurus, are members of closely related families. Below is a cladogram based on the analysis of Benson et al. in 2010. Allosauridae is one of four families in Allosauroidea; the other three are Neovenatoridae, Carcharodontosauridae and Sinraptoridae. Allosauridae has at times been proposed as ancestral to the Tyrannosauridae (which would make it paraphyletic), one example being Gregory S. Paul's Predatory Dinosaurs of the World, but this has been rejected, with tyrannosaurids identified as members of a separate branch of theropods, the Coelurosauria. Allosauridae is the smallest of the carnosaur families, with only Saurophaganax and a currently unnamed French allosauroid accepted as possible valid genera besides Allosaurus in the most recent review. Another genus, Epanterias, is a potential valid member, but it and Saurophaganax may turn out to be large examples of Allosaurus. Recent reviews have kept the genus Saurophaganax and included Epanterias with Allosaurus. Paleobiology Life history The wealth of Allosaurus fossils, from nearly all ages of individuals, allows scientists to study how the animal grew and how long its lifespan may have been. Remains may reach as far back in the lifespan as eggs—crushed eggs from Colorado have been suggested as those of Allosaurus. Based on histological analysis of limb bones, bone deposition appears to stop at around 22 to 28 years, which is comparable to that of other large theropods like Tyrannosaurus. From the same analysis, its maximum growth appears to have been at age 15, with an estimated growth rate of about 150 kilograms (330 lb) per year. Medullary bone tissue (endosteally derived, ephemeral, mineralization located inside the medulla of the long bones in gravid female birds) has been reported in at least one Allosaurus specimen, a shin bone from the Cleveland-Lloyd Quarry. Today, this bone tissue is only formed in female birds that are laying eggs, as it is used to supply calcium to shells. Its presence in the Allosaurus individual has been used to establish sex and show it had reached reproductive age. However, other studies have called into question some cases of medullary bone in dinosaurs, including this Allosaurus individual. Data from extant birds suggested that the medullary bone in this Allosaurus individual may have been the result of a bone pathology instead. However, with the confirmation of medullary tissue indicating sex in a specimen of Tyrannosaurus, it may be possible to ascertain whether or not the Allosaurus in question was indeed female. The discovery of a juvenile specimen with a nearly complete hindlimb shows that the legs were relatively longer in juveniles, and the lower segments of the leg (shin and foot) were relatively longer than the thigh. These differences suggest that younger Allosaurus were faster and had different hunting strategies than adults, perhaps chasing small prey as juveniles, then becoming ambush hunters of large prey upon adulthood. The thigh bone became thicker and wider during growth, and the cross-section less circular, as muscle attachments shifted, muscles became shorter, and the growth of the leg slowed. These changes imply that juvenile legs has less predictable stresses compared with adults, which would have moved with more regular forward progression. Conversely, the skull bones appear to have generally grown isometrically, increasing in size without changing in proportion. Feeding Many paleontologists accept Allosaurus as an active predator of large animals. There is dramatic evidence for allosaur attacks on Stegosaurus, including an Allosaurus tail vertebra with a partially healed puncture wound that fits a Stegosaurus tail spike, and a Stegosaurus neck plate with a U-shaped wound that correlates well with an Allosaurus snout. Sauropods seem to be likely candidates as both live prey and as objects of scavenging, based on the presence of scrapings on sauropod bones fitting allosaur teeth well and the presence of shed allosaur teeth with sauropod bones. However, as Gregory Paul noted in 1988, Allosaurus was probably not a predator of fully grown sauropods, unless it hunted in packs, as it had a modestly sized skull and relatively small teeth, and was greatly outweighed by contemporaneous sauropods. Another possibility is that it preferred to hunt juveniles instead of fully grown adults. Research in the 1990s and the first decade of the 21st century may have found other solutions to this question. Robert T. Bakker, comparing Allosaurus to Cenozoic saber-toothed carnivorous mammals, found similar adaptations, such as a reduction of jaw muscles and increase in neck muscles, and the ability to open the jaws extremely wide. Although Allosaurus did not have saber teeth, Bakker suggested another mode of attack that would have used such neck and jaw adaptations: the short teeth in effect became small serrations on a saw-like cutting edge running the length of the upper jaw, which would have been driven into prey. This type of jaw would permit slashing attacks against much larger prey, with the goal of weakening the victim. Similar conclusions were drawn by another study using finite element analysis on an Allosaurus skull. According to their biomechanical analysis, the skull was very strong but had a relatively small bite force. By using jaw muscles only, it could produce a bite force of 805 to 8,724 N, but the skull could withstand nearly 55,500 N of vertical force against the tooth row. The authors suggested that Allosaurus used its skull like a machete against prey, attacking open-mouthed, slashing flesh with its teeth, and tearing it away without splintering bones, unlike Tyrannosaurus, which is thought to have been capable of damaging bones. They also suggested that the architecture of the skull could have permitted the use of different strategies against different prey; the skull was light enough to allow attacks on smaller and more agile ornithopods, but strong enough for high-impact ambush attacks against larger prey like stegosaurids and sauropods. Their interpretations were challenged by other researchers, who found no modern analogues to a hatchet attack and considered it more likely that the skull was strong to compensate for its open construction when absorbing the stresses from struggling prey. The original authors noted that Allosaurus itself has no modern equivalent, that the tooth row is well-suited to such an attack, and that articulations in the skull cited by their detractors as problematic actually helped protect the palate and lessen stress. Another possibility for handling large prey is that theropods like Allosaurus were "flesh grazers" which could take bites of flesh out of living sauropods that were sufficient to sustain the predator so it would not have needed to expend the effort to kill the prey outright. This strategy would also potentially have allowed the prey to recover and be fed upon in a similar way later. An additional suggestion notes that ornithopods were the most common available dinosaurian prey, and that allosaurs may have subdued them by using an attack similar to that of modern big cats: grasping the prey with their forelimbs, and then making multiple bites on the throat to crush the trachea. This is compatible with other evidence that the forelimbs were strong and capable of restraining prey. Studies done by Stephen Lautenschager et al. from the University of Bristol also indicate Allosaurus could open its jaws quite wide and sustain considerable muscle force. When compared with Tyrannosaurus and the therizinosaurid Erlikosaurus in the same study, it was found that Allosaurus had a wider gape than either; the animal was capable of opening its jaws to a 92-degree angle at maximum. The findings also indicate that large carnivorous dinosaurs, like modern carnivores, had wider jaw gapes than herbivores. A biomechanical study published in 2013 by Eric Snively and colleagues found that Allosaurus had an unusually low attachment point on the skull for the longissimus capitis superficialis neck muscle compared to other theropods such as Tyrannosaurus. This would have allowed the animal to make rapid and forceful vertical movements with the skull. The authors found that vertical strikes as proposed by Bakker and Rayfield are consistent with the animal's capabilities. They also found that the animal probably processed carcasses by vertical movements in a similar manner to falcons, such as kestrels: the animal could have gripped prey with the skull and feet, then pulled back and up to remove flesh. This differs from the prey-handling envisioned for tyrannosaurids, which probably tore flesh with lateral shakes of the skull, similar to crocodilians. In addition, Allosaurus was able to "move its head and neck around relatively rapidly and with considerable control", at the cost of power. Other aspects of feeding include the eyes, arms, and legs. The shape of the skull of Allosaurus limited potential binocular vision to 20° of width, slightly less than that of modern crocodilians. As with crocodilians, this may have been enough to judge prey distance and time attacks. The arms, compared with those of other theropods, were suited for both grasping prey at a distance or clutching it close, and the articulation of the claws suggests that they could have been used to hook things. Finally, the top speed of Allosaurus has been estimated at 30 to 55 kilometers per hour (19 to 34 miles per hour). A paper on the cranio-dental morphology of Allosaurus and how it worked has deemed the hatchet jaw attack unlikely, reinterpreting the unusually wide gape as an adaptation to allow Allosaurus to deliver a muscle-driven bite to large prey, with the weaker jaw muscles being a trade-off to allow for the widened gape. An alternate hypothesis by Pahl and Ruedas in 2021 suggested instead that Allosaurus subsisted primarily on carrion produced by sauropods. They proposed that sauropod carcasses were analogous to modern whale falls, in that they may have provided dense energy reservoirs to the entire ecosystem as the animals died naturally of starvation or exhaustion. However, the paper has been criticized for omitting direct fossil evidence of hunting behaviour in Allosaurus, overestimating scavengers' advantages over active predators, using unrealistic modelling assumptions about carcass availability, mortality risk, and energy expenditure, and for mis-representing previous works. Pahl and Ruedas suggested that the fossil evidence apparently demonstrating hunting interactions in Allosaurus are better explained by scavenging or by predation under extenuating environmental conditions, defended their modelling assumptions, and drew attention to a preference for scavenging among modern predators as well as the resistance to microbial infections imparted by a scavenging lifestyle. Social behavior It has been speculated since the 1970s that Allosaurus preyed on sauropods and other large dinosaurs by hunting in groups. Such a depiction is common in semitechnical and popular dinosaur literature. Robert T. Bakker has extended social behavior to parental care, and has interpreted shed allosaur teeth and chewed bones of large prey animals as evidence that adult allosaurs brought food to lairs for their young to eat until they were grown, and prevented other carnivores from scavenging on the food. However, there is actually little evidence of gregarious behavior in theropods, and social interactions with members of the same species would have included antagonistic encounters, as shown by injuries to gastralia and bite wounds to skulls (the pathologic lower jaw named Labrosaurus ferox is one such possible example). Such head-biting may have been a way to establish dominance in a pack or to settle territorial disputes. Although Allosaurus may have hunted in packs, it has been argued that Allosaurus and other theropods had largely aggressive interactions instead of cooperative interactions with other members of their own species. The study in question noted that cooperative hunting of prey much larger than an individual predator, as is commonly inferred for theropod dinosaurs, is rare among vertebrates in general, and modern diapsid carnivores (including lizards, crocodiles, and birds) rarely cooperate to hunt in such a way. Instead, they are typically territorial and will kill and cannibalize intruders of the same species, and will also do the same to smaller individuals that attempt to eat before they do when aggregated at feeding sites. According to this interpretation, the accumulation of remains of multiple Allosaurus individuals at the same site; e.g., in the Cleveland–Lloyd Quarry, are not due to pack hunting, but to the fact that Allosaurus individuals were drawn together to feed on other disabled or dead allosaurs, and were sometimes killed in the process. This could explain the high proportion of juvenile and subadult allosaurs present, as juveniles and subadults are disproportionally killed at modern group feeding sites of animals like crocodiles and Komodo dragons. The same interpretation applies to Bakker's lair sites. There is some evidence for cannibalism in Allosaurus, including Allosaurus shed teeth found among rib fragments, possible tooth marks on a shoulder blade, and cannibalized allosaur skeletons among the bones at Bakker's lair sites. Brain and senses The brain of Allosaurus, as interpreted from spiral CT scanning of an endocast, was more consistent with crocodilian brains than those of the other living archosaurs, birds. The structure of the vestibular apparatus indicates that the skull was held nearly horizontal, as opposed to strongly tipped up or down. The structure of the inner ear was like that of a crocodilian, and so Allosaurus probably could have heard lower frequencies best, and would have had trouble with subtle sounds. The olfactory bulbs were large and seem to have been well suited for detecting odors, although the area for evaluating smells was relatively small. Paleopathology In 2001, Bruce Rothschild and others published a study examining evidence for stress fractures and tendon avulsions in theropod dinosaurs and the implications for their behavior. Since stress fractures are caused by repeated trauma rather than singular events they are more likely to be caused by the behavior of the animal than other kinds of injury. Stress fractures and tendon avulsions occurring in the forelimb have special behavioral significance since while injuries to the feet could be caused by running or migration, resistant prey items are the most probable source of injuries to the hand. Allosaurus was one of only two theropods examined in the study to exhibit a tendon avulsion, and in both cases the avulsion occurred on the forelimb. When the researchers looked for stress fractures, they found that Allosaurus had a significantly greater number of stress fractures than Albertosaurus, Ornithomimus or Archaeornithomimus. Of the 47 hand bones the researchers studied, three were found to contain stress fractures. Of the feet, 281 bones were studied and 17 were found to have stress fractures. The stress fractures in the foot bones "were distributed to the proximal phalanges" and occurred across all three weight-bearing toes in "statistically indistinguishable" numbers. Since the lower end of the third metatarsal would have contacted the ground first while an allosaur was running, it would have borne the most stress. If the allosaurs' stress fractures were caused by damage accumulating while walking or running this bone should have experience more stress fractures than the others. The lack of such a bias in the examined Allosaurus fossils indicates an origin for the stress fractures from a source other than running. The authors conclude that these fractures occurred during interaction with prey, like an allosaur trying to hold struggling prey with its feet. The abundance of stress fractures and avulsion injuries in Allosaurus provide evidence for "very active" predation-based rather than scavenging diets. The left scapula and fibula of an Allosaurus fragilis specimen catalogued as USNM 4734 are both pathological, both probably due to healed fractures. The specimen USNM 8367 preserved several pathological gastralia which preserve evidence of healed fractures near their middle. Some of the fractures were poorly healed and "formed pseudoarthroses". A specimen with a fractured rib was recovered from the Cleveland-Lloyd Quarry. Another specimen had fractured ribs and fused vertebrae near the end of the tail. An apparent subadult male Allosaurus fragilis was reported to have extensive pathologies, with a total of fourteen separate injuries. The specimen MOR 693 had pathologies on five ribs, the sixth neck vertebra, the third, eighth, and thirteenth back vertebrae, the second tail vertebra and its chevron, the gastralia right scapula, manual phalanx I left ilium metatarsals III and V, the first phalanx of the third toe and the third phalanx of the second. The ilium had "a large hole...caused by a blow from above". The near end of the first phalanx of the third toe was afflicted by an involucrum. Other pathologies reported in Allosaurus include: Willow breaks in two ribs Healed fractures in the humerus and radius Distortion of joint surfaces in the foot, possibly due to osteoarthritis or developmental issues Osteopetrosis along the endosteal surface of a tibia. Distortions of the joint surfaces of the tail vertebrae, possibly due to osetoarthritis or developmental issues "[E]xtensive 'neoplastic' ankylosis of caudals", possibly due to physical trauma, as well as the fusion of chevrons to centra Coossification of vertebral centra near the end of the tail Amputation of a chevron and foot bone, both possibly a result of bites "[E]xtensive exostoses" in the first phalanx of the third toe Lesions similar to those caused by osteomyelitis in two scapulae Bone spurs in a premaxilla, ungual, and two metacarpals Exostosis in a pedal phalanx possibly attributable to an infectious disease A metacarpal with a round depressed fracture Paleoecology Allosaurus was the most common large theropod in the vast tract of Western American fossil-bearing rock known as the Morrison Formation, accounting for 70 to 75% of theropod specimens, and as such was at the top trophic level of the Morrison food chain. The Morrison Formation is interpreted as a semiarid environment with distinct wet and dry seasons, and flat floodplains. Vegetation varied from river-lining forests of conifers, tree ferns, and ferns (gallery forests), to fern savannas with occasional trees such as the Araucaria-like conifer Brachyphyllum. The Morrison Formation has been a rich fossil hunting ground. The flora of the period has been revealed by fossils of green algae, fungi, mosses, horsetails, ferns, cycads, ginkgoes, and several families of conifers. Animal fossils discovered include bivalves, snails, ray-finned fishes, frogs, salamanders, turtles, sphenodonts, lizards, terrestrial and aquatic crocodylomorphs, several species of pterosaur, numerous dinosaur species, and early mammals such as docodonts, multituberculates, symmetrodonts, and triconodonts. Dinosaurs known from the Morrison include the theropods Ceratosaurus, Ornitholestes, Tanycolagreus, and Torvosaurus, the sauropods Haplocanthosaurus, Camarasaurus, Cathetosaurus, Brachiosaurus, Suuwassea, Apatosaurus, Brontosaurus, Barosaurus, Diplodocus, Supersaurus, Amphicoelias, and Maraapunisaurus, and the ornithischians Camptosaurus, Dryosaurus, and Stegosaurus. Allosaurus is commonly found at the same sites as Apatosaurus, Camarasaurus, Diplodocus, and Stegosaurus. The Late Jurassic formations of Portugal where Allosaurus is present are interpreted as having been similar to the Morrison, but with a stronger marine influence. Many of the dinosaurs of the Morrison Formation are the same genera as those seen in Portuguese rocks (mainly Allosaurus, Ceratosaurus, Torvosaurus, and Stegosaurus), or have a close counterpart (Brachiosaurus and Lusotitan, Camptosaurus and Draconyx). Allosaurus coexisted with fellow large theropods Ceratosaurus and Torvosaurus in both the United States and Portugal. The three appear to have had different ecological niches, based on anatomy and the location of fossils. Ceratosaurus and Torvosaurus may have preferred to be active around waterways, and had lower, thinner bodies that would have given them an advantage in forest and underbrush terrains, whereas Allosaurus was more compact, with longer legs, faster but less maneuverable, and seems to have preferred dry floodplains. Ceratosaurus, better known than Torvosaurus, differed noticeably from Allosaurus in functional anatomy by having a taller, narrower skull with large, broad teeth. Allosaurus was itself a potential food item to other carnivores, as illustrated by an Allosaurus pubic foot marked by the teeth of another theropod, probably Ceratosaurus or Torvosaurus. The location of the bone in the body (along the bottom margin of the torso and partially shielded by the legs), and the fact that it was among the most massive in the skeleton, indicates that the Allosaurus was being scavenged. A bone assemblage in the Upper Jurassic Mygatt-Moore Quarry preserves an unusually high occurrence of theropod bite marks, most of which can be attributed to Allosaurus and Ceratosaurus, while others could have been made by Saurophaganax or Torvosaurus given the size of the striations. While the position of the bite marks on the herbivorous dinosaurs is consistent with predation or early access to remains, bite marks found on Allosaurus material suggest scavenging, either from the other theropods or from another Allosaurus. The unusually high concentration of theropod bite marks compared to other assemblages could be explained either by a more complete utilization of resources during a dry season by theropods, or by a collecting bias in other localities. References External links Specimens, discussion, and references pertaining to Allosaurus fragilis at The Theropod Database Utah State Fossil, Allosaurus , from Pioneer: Utah's Online Library Restoration of MOR 693 ("Big Al") and muscle and organ restoration at Scott Hartman's Skeletal Drawing website List of the many possible Allosaurus species... Late Jurassic genus first appearances Late Jurassic genus extinctions Late Jurassic dinosaurs of Europe Jurassic Portugal Fossils of Portugal Lourinhã Formation Late Jurassic dinosaurs of North America Dinosaurs of the Morrison Formation Paleontology in Colorado Paleontology in Wyoming Paleontology in Utah Fossil taxa described in 1877 Taxa named by Othniel Charles Marsh Apex predators

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https://en.wikipedia.org/wiki/AK-47

AK-47

The AK-47, officially known as the Avtomat Kalashnikova (; also known as the Kalashnikov or just AK), is a gas-operated assault rifle that is chambered for the 7.62×39mm cartridge. Developed in the Soviet Union by Russian small-arms designer Mikhail Kalashnikov, it is the originating firearm of the Kalashnikov (or "AK") family of rifles. After more than seven decades since its creation, the AK-47 model and its variants remain one of the most popular and widely used firearms in the world. The number "47" refers to the year the rifle was finished. Design work on the AK-47 began in 1945. It was presented for official military trials in 1947, and, in 1948, the fixed-stock version was introduced into active service for selected units of the Soviet Army. In early 1949, the AK was officially accepted by the Soviet Armed Forces and used by the majority of the member states of the Warsaw Pact. The model and its variants owe their global popularity to their reliability under harsh conditions, low production cost (compared to contemporary weapons), availability in virtually every geographic region, and ease of use. The AK has been manufactured in many countries, and has seen service with armed forces as well as irregular forces and insurgencies throughout the world. , "of the estimated 500 million firearms worldwide, approximately 100 million belong to the Kalashnikov family, three-quarters of which are AK-47s". The model is the basis for the development of many other types of individual, crew-served and specialised firearms. History Origins During World War II, the Sturmgewehr 44 rifle used by German forces made a deep impression on their Soviet counterparts. The select-fire rifle was chambered for a new intermediate cartridge, the 7.92×33mm Kurz, and combined the firepower of a submachine gun with the range and accuracy of a rifle. On 15 July 1943, an earlier model of the Sturmgewehr was demonstrated before the People's Commissariat of Arms of the USSR. The Soviets were impressed with the weapon and immediately set about developing an intermediate caliber fully automatic rifle of their own, to replace the PPSh-41 submachine guns and outdated Mosin–Nagant bolt-action rifles that armed most of the Soviet Army. The Soviets soon developed the 7.62×39mm M43 cartridge, used in the semi-automatic SKS carbine and the RPD light machine gun. Shortly after World War II, the Soviets developed the AK-47 rifle, which quickly replaced the SKS in Soviet service. Introduced in 1959, the AKM is a lighter stamped steel version and the most ubiquitous variant of the entire AK series of firearms. In the 1960s, the Soviets introduced the RPK light machine gun, an AK type weapon with a stronger receiver, a longer heavy barrel, and a bipod, that eventually replaced the RPD light machine gun. Concept Mikhail Kalashnikov began his career as a weapon designer in 1941 while recuperating from a shoulder wound which he received during the Battle of Bryansk. Kalashnikov himself stated..."I was in the hospital, and a soldier in the bed beside me asked: 'Why do our soldiers have only one rifle for two or three of our men, when the Germans have automatics?' So I designed one. I was a soldier, and I created a machine gun for a soldier. It was called an Avtomat Kalashnikova, the automatic weapon of Kalashnikov—AK—and it carried the year of its first manufacture, 1947." The AK-47 is best described as a hybrid of previous rifle technology innovations. "Kalashnikov decided to design an automatic rifle combining the best features of the American M1 Garand and the German StG 44." Kalashnikov's team had access to these weapons and had no need to "reinvent the wheel". Kalashnikov himself observed: "A lot of Russian Army soldiers ask me how one can become a constructor, and how new weaponry is designed. These are very difficult questions. Each designer seems to have his own paths, his own successes and failures. But one thing is clear: before attempting to create something new, it is vital to have a good appreciation of everything that already exists in this field. I myself have had many experiences confirming this to be so." Some claimed that Kalashnikov copied designs like Bulkin's TKB-415 or Simonov's AVS-31. Early designs Kalashnikov started work on a submachine gun design in 1942 and light machine gun design in 1943. Early in 1944, Kalashnikov was given some 7.62×39mm M43 cartridges and informed that other designers were working on weapons for this new Soviet small-arms cartridge. It was suggested that a new weapon might well lead to greater things. He then undertook work on the new rifle. In 1944, he entered a design competition with this new 7.62×39mm, semi-automatic, gas-operated, long-stroke piston carbine, strongly influenced by the American M1 Garand. The new rifle was in the same class as the SKS-45 carbine, with a fixed magazine and gas tube above the barrel. However, the new Kalashnikov design lost out to a Simonov design. In 1946, a new design competition was initiated to develop a new rifle. Kalashnikov submitted a gas-operated rifle with a short-stroke gas piston above the barrel, a breechblock mechanism similar to his 1944 carbine, and a curved 30-round magazine. Kalashnikov's rifles, the AK-1 (with a milled receiver) and AK-2 (with a stamped receiver), proved to be reliable weapons and were accepted to a second round of competition along with other designs. These prototypes (also known as the AK-46) had a rotary bolt, a two-part receiver with separate trigger unit housing, dual controls (separate safety and fire selector switches) and a non-reciprocating charging handle located on the left side of the weapon. This design had many similarities to the StG 44. In late 1946, as the rifles were being tested, one of Kalashnikov's assistants, Aleksandr Zaitsev, suggested a major redesign to improve reliability. At first, Kalashnikov was reluctant, given that their rifle had already fared better than its competitors. Eventually, however, Zaitsev managed to persuade Kalashnikov. In November 1947, the new prototypes (AK-47s) were completed. The rifle used a long-stroke gas piston above the barrel. The upper and lower receivers were combined into a single receiver. The selector and safety were combined into a single control lever/dust cover on the right side of the rifle. And, the bolt-handle was simply attached to the bolt-carrier. This simplified the design and production of the rifle. The first army trial series began in early 1948. The new rifle proved to be reliable under a wide range of conditions and possessed convenient handling characteristics. In 1949, it was adopted by the Soviet Army as "7.62 mm Kalashnikov rifle (AK)". Further development There were many difficulties during the initial phase of production. The first production models had stamped sheet metal receivers with a milled trunnion and butt stock insert, and a stamped body. Difficulties were encountered in welding the guide and ejector rails, causing high rejection rates. Instead of halting production, a heavy machined receiver was substituted for the sheet metal receiver. Even though production of these milled rifles started in 1951, they were officially referred to as AK-49, based on the date their development started, but they are widely known in the collectors' and current commercial market as "Type 2 AK-47". This was a more costly process, but the use of machined receivers accelerated production as tooling and labor for the earlier Mosin–Nagant rifle's machined receiver were easily adapted. Partly because of these problems, the Soviets were not able to distribute large numbers of the new rifle to soldiers until 1956. During this time, production of the interim SKS rifle continued. Once the manufacturing difficulties of non-milled receivers had been overcome, a redesigned version designated the AKM (M for "modernized" or "upgraded"; in Russian: []) was introduced in 1959. This new model used a stamped sheet metal receiver and featured a slanted muzzle brake on the end of the barrel to compensate for muzzle rise under recoil. In addition, a hammer retarder was added to prevent the weapon from firing out of battery (without the bolt being fully closed), during rapid or fully automatic fire. This is also sometimes referred to as a "cyclic rate reducer", or simply "rate reducer", as it also has the effect of reducing the number of rounds fired per minute during fully automatic fire. The rifle was also roughly one-third lighter than the previous model. Most licensed and unlicensed productions of the Kalashnikov assault rifle abroad were of the AKM variant, partially due to the much easier production of the stamped receiver. This model is the most commonly encountered, having been produced in much greater quantities. All rifles based on the Kalashnikov design are often colloquially referred to as "AK-47s" in the West and some parts of Asia, although this is only correct when applied to rifles based on the original three receiver types. In most former Eastern Bloc countries, the weapon is known simply as the "Kalashnikov" or "AK". The differences between the milled and stamped receivers includes the use of rivets rather than welds on the stamped receiver, as well as the placement of a small dimple above the magazine well for stabilization of the magazine. Replacement In 1974, the Soviets began replacing their AK-47 and AKM rifles with a newer design, the AK-74, which uses 5.45×39mm ammunition. This new rifle and cartridge had only started to be manufactured in Eastern European nations when the Soviet Union collapsed, drastically slowing production of the AK-74 and other weapons of the former Soviet bloc. Design The AK-47 was designed to be a simple, reliable fully automatic rifle that could be manufactured quickly and cheaply, using mass production methods that were state of the art in the Soviet Union during the late 1940s. The AK-47 uses a long-stroke gas system generally associated with high reliability in adverse conditions. The large gas piston, generous clearance between moving parts, and tapered cartridge case design allow the gun to endure large amounts of foreign matter and fouling without failing to cycle. Cartridge The AK fires the 7.62×39mm cartridge with a muzzle velocity of . The cartridge weight is , the projectile weight is . The original Soviet M43 bullets are 123 grain boat-tail bullets with a copper-plated steel jacket, a large steel core, and some lead between the core and the jacket. The AK has excellent penetration when shooting through heavy foliage, walls or a common vehicle's metal body and into an opponent attempting to use these things as cover. The 7.62×39mm M43 projectile does not generally fragment when striking an opponent and has an unusual tendency to remain intact even after making contact with bone. The 7.62×39mm round produces significant wounding in cases where the bullet tumbles (yaws) in tissue, but produces relatively minor wounds in cases where the bullet exits before beginning to yaw. In the absence of yaw, the M43 round can pencil through tissue with relatively little injury. Most, if not all, of the 7.62×39mm ammunition found today is of the upgraded M67 variety. This variety deleted the steel insert, shifting the center of gravity rearward, and allowing the projectile to destabilize (or yaw) at about , nearly earlier in tissue than the M43 round. This change also reduces penetration in ballistic gelatin to ~ for the newer M67 round versus ~ for the older M43 round. However, the wounding potential of M67 is mostly limited to the small permanent wound channel the bullet itself makes, especially when the bullet yaws. Operating mechanism To fire, the operator inserts a loaded magazine, pulls back and releases the charging handle, and then pulls the trigger. In semi-automatic, the firearm fires only once, requiring the trigger to be released and depressed again for the next shot. In fully automatic, the rifle continues to fire automatically cycling fresh rounds into the chamber until the magazine is exhausted or pressure is released from the trigger. After ignition of the cartridge primer and propellant, rapidly expanding propellant gases are diverted into the gas cylinder above the barrel through a vent near the muzzle. The build-up of gases inside the gas cylinder drives the long-stroke piston and bolt carrier rearward and a cam guide machined into the underside of the bolt carrier, along with an ejector spur on the bolt carrier rail guide, rotates the bolt approximately 35° and unlocks it from the barrel extension via a camming pin on the bolt. The moving assembly has about of free travel, which creates a delay between the initial recoil impulse of the piston and the bolt unlocking sequence, allowing gas pressures to drop to a safe level before the seal between the chamber and the bolt is broken. The AK-47 does not have a gas valve; excess gases are ventilated through a series of radial ports in the gas cylinder. Unlike many other rifle platforms, such as the AR-15 platform, the Kalashnikov platform bolt locking lugs are chamfered allowing for primary extraction upon bolt rotation which aids reliable feeding and extraction, albeit not with that much force due to the short distance the bolt carrier travels before acting on the locking lug. The Kalashnikov platform then uses an extractor claw to eject the spent cartridge case. Barrel The rifle received a barrel with a chrome-lined bore and four right-hand grooves at a 240 mm (1 in 9.45 in) or 31.5 calibers rifling twist rate. The gas block contains a gas channel that is installed at a slanted angle in relation to the bore axis. The muzzle is threaded for the installation of various muzzle devices such as a muzzle brake or a blank-firing adaptor. Gas block The gas block of the AK-47 features a cleaning rod capture or sling loop. Gas relief ports that alleviate gas pressure are placed horizontally in a row on the gas cylinder. Fire selector The fire selector is a large lever located on the right side of the rifle; it acts as a dust cover and prevents the charging handle from being pulled fully to the rear when it is on safe. It is operated by the shooter's right fore-fingers and has three settings: safe (up), full-auto (center), and semi-auto (down). The reason for this is that a soldier under stress will push the selector lever down with considerable force, bypassing the full-auto stage and setting the rifle to semi-auto. To set the AK-47 to full-auto requires the deliberate action of centering the selector lever. To operate the fire selector lever, right-handed shooters have to briefly remove their right hand from the pistol grip, which is ergonomically sub-optimal. Some AK-type rifles also have a more traditional selector lever on the left side of the receiver, just above the pistol grip. This lever is operated by the shooter's right thumb and has three settings: safe (forward), full-auto (center), and semi-auto (backward). Sights The AK-47 uses a notched rear tangent iron sight calibrated in increments from . The front sight is a post adjustable for elevation in the field. Horizontal adjustment requires a special drift tool and is done by the armory before issue or if the need arises by an armorer after issue. The sight line elements are approximately over the bore axis. The "point-blank range" battle zero setting "П" standing for постоянная (constant) on the 7.62×39mm AK-47 rear tangent sight element corresponds to a zero. These settings mirror the Mosin–Nagant and SKS rifles, which the AK-47 replaced. For the AK-47 combined with service cartridges, the 300 m battle zero setting limits the apparent "bullet rise" within approximately relative to the line of sight. Soldiers are instructed to fire at any target within this range by simply placing the sights on the center of mass (the belt buckle, according to Russian and former Soviet doctrine) of the enemy target. Any errors in range estimation are tactically irrelevant, as a well-aimed shot will hit the torso of the enemy soldier. Some AK-type rifles have a front sight with a flip-up luminous dot that is calibrated at , for improved night fighting. Furniture The AK-47 was originally equipped with a buttstock, handguard and an upper heat guard made from solid wood. With the introduction of the Type 3 receiver the buttstock, lower handguard and upper heatguard were manufactured from birch plywood laminates. Such engineered woods are stronger and resist warping better than the conventional one-piece patterns, do not require lengthy maturing, and are cheaper. The wooden furniture was finished with the Russian amber shellac finishing process. AKS and AKMS models featured a downward-folding metal butt-stock similar to that of the German MP40 submachine-gun, for use in the restricted space in the BMP infantry combat vehicle, as well as by paratroops. All 100 series AKs use plastic furniture with side-folding stocks. Magazines The standard magazine capacity is 30 rounds. There are also 10, 20, and 40-round box magazines, as well as 75-round drum magazines. The AK-47's standard 30-round magazines have a pronounced curve that allows them to smoothly feed ammunition into the chamber. Their heavy steel construction combined with "feed-lips" (the surfaces at the top of the magazine that control the angle at which the cartridge enters the chamber) machined from a single steel billet makes them highly resistant to damage. These magazines are so strong that "Soldiers have been known to use their mags as hammers, and even bottle openers". This contributes to the AK-47 magazine being more reliable, but makes it heavier than U.S. and NATO magazines. The early slab-sided steel AK-47 30-round detachable box magazines had sheet-metal bodies and weighed empty. The later steel AKM 30-round magazines had lighter sheet-metal bodies with prominent reinforcing ribs weighing empty. To further reduce weight, a lightweight magazine with an aluminum body with a prominent reinforcing waffle rib pattern weighing empty was developed for the AKM that proved to be too fragile and the small issued amount of these magazines was quickly withdrawn from service. As a replacement steel-reinforced 30-round plastic 7.62×39mm box magazines were introduced. These rust-colored magazines weigh empty and are often mistakenly identified as being made of Bakelite (a phenolic resin), but were actually fabricated from two-parts of AG-S4 molding compound (a glass-reinforced phenol-formaldehyde binder impregnated composite), assembled using an epoxy resin adhesive. Noted for their durability, these magazines did however compromise the rifle's camouflage and lacked the small horizontal reinforcing ribs running down both sides of the magazine body near the front that were added on all later plastic magazine generations. A second generation steel-reinforced dark-brown (color shades vary from maroon to plum to near black) 30-round 7.62×39mm magazine was introduced in the early 1980s, fabricated from ABS plastic. The third generation steel-reinforced 30-round 7.62×39mm magazine is similar to the second generation, but is darker colored and has a matte nonreflective surface finish. The current issue steel-reinforced matte true black nonreflective surface finished 7.62×39mm 30-round magazines, fabricated from ABS plastic weigh empty. Early steel AK-47 magazines are long; the later ribbed steel AKM and newer plastic 7.62×39mm magazines are about shorter. The transition from steel to mainly plastic magazines yields a significant weight reduction and allows a soldier to carry more ammunition for the same weight. All 7.62×39mm AK magazines are backwards compatible with older AK variants. 10.12 kg (22.3 lb) is the maximum amount of ammo that the average soldier can comfortably carry. It also allows for best comparison of the three most common 7.62×39mm AK magazines. Most Yugoslavian and some East German AK magazines were made with cartridge followers that hold the bolt open when empty; however, most AK magazine followers allow the bolt to close when the magazine is empty. Accessories Accessories supplied with the rifle include a long 6H3 bayonet featuring a long spear point blade. The AK-47 bayonet is installed by slipping the diameter muzzle ring around the muzzle and latching the handle down on the bayonet lug under the front sight base. All current model AKM rifles can mount under-barrel 40 mm grenade launchers such as the GP-25 and its variants, which can fire up to 20 rounds per minute and have an effective range of up to 400 metres. The main grenade is the VOG-25 (VOG-25M) fragmentation grenade which has a 6 m (9 m) (20 ft (30 ft)) lethality radius. The VOG-25P/VOG-25PM ("jumping") variant explodes above the ground. The AK-47 can also mount a (rarely used) cup-type grenade launcher, the Kalashnikov grenade launcher that fires standard RGD-5 Soviet hand-grenades. The maximum effective range is approximately 150 meters. This launcher can also be used to launch tear-gas and riot control grenades. All current AKs (100 series) and some older models, have side rails for mounting a variety of scopes and sighting devices, such as the PSO-1 Optical Sniper Sight. The side rails allow for the removal and remounting of optical accessories without interfering with the zeroing of the optic. However, the 100 series side folding stocks cannot be folded with the optics mounted. Characteristics Service life The AK-47 and its variants have been and are made in dozens of countries, with "quality ranging from finely engineered weapons to pieces of questionable workmanship." As a result, the AK-47 has a service/system life of approximately 6,000, to 10,000, to 15,000 rounds. The AK-47 was designed to be a cheap, simple, easy to manufacture rifle, perfectly matching Soviet military doctrine that treats equipment and weapons as disposable items. As units are often deployed without adequate logistical support and dependent on "battlefield cannibalization" for resupply, it is actually more cost-effective to replace rather than repair weapons. The AK-47 has small parts and springs that need to be replaced every few thousand rounds. However, "Every time it is disassembled beyond the field stripping stage, it will take some time for some parts to regain their fit, some parts may tend to shake loose and fall out when firing the weapon. Some parts of the AK-47 line are riveted together. Repairing these can be quite a hassle, since the end of the rivet has to be ground off and a new one set after the part is replaced." Variants Early variants (7.62×39mm) Issue of 1948/49: Type 1: The very earliest models, stamped sheet metal receiver, are now very rare. Issue of 1951: Type 2: Has a milled receiver. Barrel and chamber are chrome plated to resist corrosion. Issue of 1954/55: Type 3: Lightened, milled receiver variant. Rifle weight is . AKS (AKS-47): Type 1, 2, or 3 receiver: Featured a downward-folding metal stock similar to that of the MP 40 produced in Nazi Germany, for use in the restricted space in the BMP infantry combat vehicle, as well as by paratroops. AKN (AKSN): Night scope rail. Modernized (7.62×39mm) AKM: A simplified, lighter version of the AK-47; Type 4 receiver is made from stamped and riveted sheet metal. A slanted muzzle device was added to counter climb in automatic fire. Rifle weight is due to the lighter receiver. This is the most ubiquitous variant of the AK-47. AKMS: Under-folding stock version of the AKM intended for airborne troops. AKMN (AKMSN): Night scope rail. AKML (AKMSL): Slotted flash suppressor and night scope rail. RPK: Hand-held machine gun version with longer barrel and bipod. The variants—RPKS, RPKN (RPKSN), RPKL (RPKSL)—mirror AKM variants. The "S" variants have a side-folding wooden stock. Foreign Variants (7.62×39mm) Type 56: Chinese assault rifle based on the . Still in production primarily for export markets. For the further developed AK models, see Kalashnikov rifles. Production Manufacturing countries of AK-47 and its variants in alphabetical order. A private company Kalashnikov Concern (formerly Izhmash) from Russia has repeatedly claimed that the majority of foreign manufacturers are producing AK-type rifles without proper licensing. Accuracy potential Western method The AK-47's accuracy has always been considered to be "good enough" to hit an adult male torso out to about , though even experts firing from prone or bench rest positions at this range were observed to have difficulty placing ten consecutive rounds on target. Later designs did not significantly improve the rifle's accuracy. An AK can fire a 10-shot group of at , and at The newer stamped-steel receiver AKM models, while more rugged and less prone to metal fatigue, are actually less accurate than the forged/milled receivers of their predecessors: the milled AK-47s are capable of shooting groups at , whereas the stamped AKMs are capable of shooting groups at . The best shooters are able to hit a man-sized target at within five shots (firing from prone or bench rest position) or ten shots (standing). The single-shot hit-probability on the NATO E-type Silhouette Target (a human upper body half and head silhouette) of the AK-47 and the later developed AK-74, M16A1 and M16A2 rifles were measured by the US military under ideal proving ground conditions in the 1980s as follows: Under worst field exercise circumstances, the hit probabilities for all the tested rifles were drastically reduced, 34% at 50m down to 3–4% at 600m with no significant differences between weapons at each range. Russian method The following table represents the Russian method for determining accuracy, which is far more complex than Western methods. In the West, one fires a group of shots into the target and then simply measures the overall diameter of the group. The Russians, on the other hand, fire a group of shots into the target. They then draw two circles on the target, one for the maximum vertical dispersion of hits and one for the maximum horizontal dispersion of hits. They then disregard the hits on the outer part of the target and only count half of the hits (50% or R50) on the inner part of the circles. This dramatically reduces the overall diameter of the groups. They then use both the vertical and horizontal measurements of the reduced groups to measure accuracy. This circular error probable method used by the Russians and other European militaries cannot be converted and is not comparable to US military methods for determining rifle accuracy. When the R50 results are doubled the hit probability increases to 93.7%. R50 means the closest 50 percent of the shot group will all be within a circle of the mentioned diameter. The vertical and horizontal mean (R50) deviations with service ammunition at for AK platforms are. Users : Type 56 variant. : EKAM: The counter-terrorist unit of the Hellenic Police. : Type 58 variant. – Locally made as well as being in service with the Army : Replaced by the AKM in 1959 and the AK-74 in 1974. Used by Thahan Phran Former users : MPi-K (AK-47) and MPi-KM (AKM). : Replaced by the AKM and AK-74. : Captured from PAVN and Vietcong Illicit trade Throughout the world, the AK and its variants are commonly used by governments, revolutionaries, terrorists, criminals, and civilians alike. In some countries, such as Somalia, Rwanda, Mozambique, Congo and Tanzania, the prices for Black Market AKs are between $30 and $125 per weapon and prices have fallen in the last few decades due to mass counterfeiting. In Kenya, "an AK-47 fetches five head of cattle (about 10,000 Kenya shillings or 100 U.S. dollars) when offered for barter, but costs almost half that price when cash is paid". There are places around the world where AK type weapons can be purchased on the black market "for as little as $6, or traded for a chicken or a sack of grain". The AK-47 has also spawned a cottage industry of sorts and has been copied and manufactured (one gun at a time) in small shops around the world (see Khyber Pass Copy). The estimated numbers of AK-type weapons vary greatly. The Small Arms Survey suggest that "between 70 and 100 million of these weapons have been produced since 1947". The World Bank estimates that out of the 500 million total firearms available worldwide, 100 million are of the Kalashnikov family, and 75 million are AK-47s. Because AK-type weapons have been made in many countries, often illicitly, it is impossible to know how many really exist. Conflicts The AK-47 has been used in the following conflicts: 1950s Hungarian Revolution (1956) Vietnam War (1955–1975) Laotian Civil War (1959–1975) 1960s Congo Crisis (1960–1965) Portuguese Colonial War (1961–1974) Rhodesian Bush War (1964–1979) The Troubles (late 1960s–1998) Communist insurgency in Thailand (1965–1983) South African Border War (1966–1990) India-China clashes (1967) Cambodian Civil War (1968–1975) Communist insurgency in Malaysia (1968–1989) 1970s Yom Kippur War (1973) Ethiopian Civil War (1974–1991) Western Sahara War (1975–1991) Cambodian–Vietnamese War (1978–1989) Chadian–Libyan conflict (1978–1987) Soviet–Afghan War (1979–1989) 1980s Iran–Iraq War (1980–1988) Kashmir Insurgency (1988–2022) Sri Lankan Civil War (1983–2009) United States invasion of Grenada (1983) Lord's Resistance Army insurgency (1987–present) 1990s Tuareg rebellion (1990–1995) Gulf War (1990–1991) Somali Civil War (1991–present) Yugoslav Wars (1991–2001) Burundian Civil War (1993–2005) Congo Civil War (1997–1999) Kargil War (1999) 2000s War in Afghanistan (2001–2021) Iraq War (2003–2011) South Thailand insurgency (2004–present) Mexican Drug War (2006–present) 2010s Libyan Civil War (2011) Syrian Civil War (2011–present) Iraqi insurgency (2011–2013) Central African Republic Civil War (2012–present) Russo-Ukrainian war (2014–present) 2020s 2020 Nagorno-Karabakh war (2020) Tigray War (2020–2022) Russian invasion of Ukraine (2022–present) Cultural influence and impact During the Cold War, the Soviet Union and the People's Republic of China, as well as United States and other NATO nations supplied arms and technical knowledge to numerous countries and rebel forces around the world. During this time the Western countries used relatively expensive automatic rifles, such as the FN FAL, the HK G3, the M14, and the M16. In contrast, the Russians and Chinese used the AK-47; its low production cost and ease of manufacture allow them to make AKs in vast numbers. In the pro-communist states, the AK-47 became a symbol of the Third World revolution. They were utilized in the Cambodian Civil War and the Cambodian–Vietnamese War. During the 1980s, the Soviet Union became the principal arms dealer to countries embargoed by Western nations, including Middle Eastern nations such as Libya and Syria, which welcomed Soviet Union backing against Israel. After the fall of the Soviet Union, AK-47s were sold both openly and on the black market to any group with cash, including drug cartels and dictatorial states, and more recently they have been seen in the hands of Islamic groups such as Al-Qaeda, ISIL, and the Taliban in Afghanistan and Iraq, and FARC, Ejército de Liberación Nacional guerrillas in Colombia. In Russia, the Kalashnikov is a tremendous source of national pride. "The family of the inventor of the world's most famous rifle, Mikhail Kalashnikov, has authorized German engineering company MMI to use the well-known Kalashnikov name on a variety of not-so-deadly goods." In recent years, Kalashnikov Vodka has been marketed with souvenir bottles in the shape of the AK-47 Kalashnikov. There are also Kalashnikov watches, umbrellas, and knives. The Kalashnikov Museum (also called the AK-47 museum) opened on 4 November 2004 in Izhevsk, Udmurt Republic. This city is in the Ural Region of Russia. The museum chronicles the biography of General Kalashnikov and documents the invention of the AK-47. The museum complex of Kalashnikov's small arms, a series of halls, and multimedia exhibitions are devoted to the evolution of the AK-47 rifle and attracts 10,000 monthly visitors. Nadezhda Vechtomova, the museum director, stated in an interview that the purpose of the museum is to honor the ingenuity of the inventor and the hard work of the employees and to "separate the weapon as a weapon of murder from the people who are producing it and to tell its history in our country". On 19 September 2017 a monument of Kalashnikov was unveiled in central Moscow. A protester, later detained by police, attempted to unfurl a banner reading "a creator of weapons is a creator of death". The proliferation of this weapon is reflected by more than just numbers. The AK-47 is included on the flag of Mozambique and its emblem, an acknowledgment that the country gained its independence in large part through the effective use of their AK-47s. It is also found in the coats of arms of East Timor, Zimbabwe and the revolution era Burkina Faso, as well as in the flags of Hezbollah, Syrian Resistance, FARC-EP, the New People's Army, TKP/TIKKO and the International Revolutionary People's Guerrilla Forces. U.S. and Western Europe countries frequently associate the AK-47 with their enemies; both Cold War era and present-day. For example, Western works of fiction (movies, television, novels, video games) often portray criminals, gang members, insurgents, and terrorists using AK-47s as the weapon of choice. Conversely, throughout the developing world, the AK-47 can be positively attributed with revolutionaries against foreign occupation, imperialism, or colonialism. In Ireland the AK-47 is associated with The Troubles due to its extensive use by republican paramilitaries during this period. In 2013, a decommissioned AK-47 was included in the A History of Ireland in 100 Objects collection. The AK-47 made an appearance in U.S. popular culture as a recurring focus in the Nicolas Cage film Lord of War (2005). Numerous monologues in the movie focus on the weapon, and its effects on global conflict and the gun running market. In Iraq and Afghanistan, private military company contractors from the U.K. and other countries used the AK-47 and its variants along with Western firearms such as the AR-15. In 2006, the Colombian musician and peace activist César López devised the escopetarra, an AK converted into a guitar. One sold for US$17,000 in a fundraiser held to benefit the victims of anti-personnel mines, while another was exhibited at the United Nations' Conference on Disarmament. In Mexico, the AK-47 is known as "Cuerno de Chivo" (literally "Goat's Horn") because of its curved magazine design. It is one of the weapons of choice of Mexican drug cartels. It is sometimes mentioned in Mexican folk music lyrics. Gallery See also Comparison of the AK-47 and M16 AK-12 PK machine gun Notes References Bibliography Further reading Ружье. Оружие и амуниция, 1999/3, pp. 18–21 has an article about the AK-47 prototypes. An article rejecting some of the alternative theories as to the authorship of the AK-47. An article comparing the internals of the StG 44 and AK-47. Transcription of the commission report on the testing round from the summer of 1947; no winner was selected at this point, but the commission held Kalashnikov's, Dementiev's and Bulkin's designs as most closely satisfying TTT number 3131. Report/letter on the final round of testing, 27 December 1947, declaring Kalashnikov's design the winner. Articles on the 1948 military trials. External links US Army Operator's Manual for the AK-47 Assault Rifle & Weapons and ammunition introduced in 1947 7.62×39mm assault rifles Infantry weapons of the Cold War Rifles of the Cold War Kalashnikov derivatives Assault rifles of the Soviet Union Kalashnikov Concern products

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

Atanasoff–Berry computer

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

1354

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

Andes

The Andes, Andes Mountains or Andean Mountain Range (; ) are the longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range is long, wide (widest between 18°S – 20°S latitude), and has an average height of about . The Andes extend from north to south through seven South American countries: Venezuela, Colombia, Ecuador, Peru, Bolivia, Chile, and Argentina. Along their length, the Andes are split into several ranges, separated by intermediate depressions. The Andes are the location of several high plateaus—some of which host major cities such as Quito, Bogotá, Cali, Arequipa, Medellín, Bucaramanga, Sucre, Mérida, El Alto and La Paz. The Altiplano plateau is the world's second-highest after the Tibetan plateau. These ranges are in turn grouped into three major divisions based on climate: the Tropical Andes, the Dry Andes, and the Wet Andes. The Andes Mountains are the highest mountain range outside Asia. The highest mountain outside Asia, Argentina's Mount Aconcagua, rises to an elevation of about above sea level. The peak of Chimborazo in the Ecuadorian Andes is farther from the Earth's center than any other location on the Earth's surface, due to the equatorial bulge resulting from the Earth's rotation. The world's highest volcanoes are in the Andes, including Ojos del Salado on the Chile-Argentina border, which rises to . The Andes are also part of the American Cordillera, a chain of mountain ranges (cordillera) that consists of an almost continuous sequence of mountain ranges that form the western "backbone" of North America, Central America, South America and Antarctica. Etymology The etymology of the word Andes has been debated. The majority consensus is that it derives from the Quechua word 'east' as in Antisuyu (Quechua for 'east region'), one of the four regions of the Inca Empire. The term cordillera comes from the Spanish word cordel 'rope' and is used as a descriptive name for several contiguous sections of the Andes, as well as the entire Andean range, and the combined mountain chain along the western part of the North and South American continents. Geography The Andes can be divided into three sections: The Southern Andes in Argentina and Chile, south of Llullaillaco. The Central Andes in Peru and Bolivia. The Northern Andes in Venezuela, Colombia, and Ecuador. In the northern part of the Andes, the separate Sierra Nevada de Santa Marta range is often treated as part of the Northern Andes. The Leeward Antilles islands Aruba, Bonaire, and Curaçao, which lie in the Caribbean Sea off the coast of Venezuela, were formerly thought to represent the submerged peaks of the extreme northern edge of the Andes range, but ongoing geological studies indicate that such a simplification does not do justice to the complex tectonic boundary between the South American and Caribbean plates. Geology The Andes are a Mesozoic–Tertiary orogenic belt of mountains along the Pacific Ring of Fire, a zone of volcanic activity that encompasses the Pacific rim of the Americas as well as the Asia-Pacific region. The Andes are the result of tectonic plate processes, caused by the subduction of oceanic crust beneath the South American Plate as the Nazca Plate and South American Plate converge. These processes were accelerated by the effects of climate. As the uplift of the Andes created a rain shadow on the western fringes of Chile, ocean currents and prevailing winds carried moisture away from the Chilean coast. This caused some areas of the subduction zone to be sediment starved, causing excess friction and an increased rate of compressed coastal uplift. The main cause of the rise of the Andes is the compression of the western rim of the South American Plate due to the subduction of the Nazca Plate and the Antarctic Plate.To the east, the Andes range is bounded by several sedimentary basins, such as Orinoco, Amazon Basin, Madre de Dios and Gran Chaco, that separate the Andes from the ancient cratons in eastern South America. In the south, the Andes share a long boundary with the former Patagonia Terrane. To the west, the Andes end at the Pacific Ocean, although the Peru-Chile trench can be considered their ultimate western limit. From a geographical approach, the Andes are considered to have their western boundaries marked by the appearance of coastal lowlands and a less rugged topography. The Andes Mountains also contain large quantities of iron ore located in many mountains within the range. The Andean orogen has a series of bends or oroclines. The Bolivian Orocline is a seaward concave bending in the coast of South America and the Andes Mountains at about 18° S. At this point, the orientation of the Andes turns from Northwest in Peru to South in Chile and Argentina. The Andean segment north and south of the Orocline have been rotated 15° to 20° counter clockwise and clockwise respectively. The Bolivian Orocline area overlaps with the area of maximum width of the Altiplano Plateau and according to Isacks (1988) the Orocline is related to crustal shortening. The specific point at 18° S where the coastline bends is known as the "Arica Elbow". Further south lies the Maipo Orocline a more subtle Orocline between 30° S and 38°S with a seaward-concave break in trend at 33° S. Near the southern tip of the Andes lies the Patagonian Orocline. Orogeny The western rim of the South American Plate has been the place of several pre-Andean orogenies since at least the late Proterozoic and early Paleozoic, when several terranes and microcontinents collided and amalgamated with the ancient cratons of eastern South America, by then the South American part of Gondwana. The formation of the modern Andes began with the events of the Triassic when Pangaea began the break up that resulted in developing several rifts. The development continued through the Jurassic Period. It was during the Cretaceous Period that the Andes began to take their present form, by the uplifting, faulting and folding of sedimentary and metamorphic rocks of the ancient cratons to the east. The rise of the Andes has not been constant, as different regions have had different degrees of tectonic stress, uplift, and erosion. Tectonic forces above the subduction zone along the entire west coast of South America where the Nazca Plate and a part of the Antarctic Plate are sliding beneath the South American Plate continue to produce an ongoing orogenic event resulting in minor to major earthquakes and volcanic eruptions to this day. In the extreme south, a major transform fault separates Tierra del Fuego from the small Scotia Plate. Across the wide Drake Passage lie the mountains of the Antarctic Peninsula south of the Scotia Plate which appear to be a continuation of the Andes chain. The regions immediately east of the Andes experience a series of changes resulting from the Andean orogeny. Parts of the Sunsás Orogen in Amazonian craton disappeared from the surface of earth being overridden by the Andes. The Sierras de Córdoba, where the effects of the ancient Pampean orogeny can be observed, owe their modern uplift and relief to the Andean orogeny in the Tertiary. Further south in southern Patagonia the onset of the Andean orogeny caused the Magallanes Basin to evolve from being an extensional back-arc basin in the Mesozoic to being a compressional foreland basin in the Cenozoic. Volcanism The Andes range has many active volcanoes distributed in four volcanic zones separated by areas of inactivity. The Andean volcanism is a result of subduction of the Nazca Plate and Antarctic Plate underneath the South American Plate. The belt is subdivided into four main volcanic zones that are separated from each other by volcanic gaps. The volcanoes of the belt are diverse in terms of activity style, products and morphology. While some differences can be explained by which volcanic zone a volcano belongs to, there are significant differences inside volcanic zones and even between neighbouring volcanoes. Despite being a type location for calc-alkalic and subduction volcanism, the Andean Volcanic Belt has a large range of volcano-tectonic settings, such as rift systems and extensional zones, transpressional faults, subduction of mid-ocean ridges and seamount chains apart from a large range of crustal thicknesses and magma ascent paths, and different amount of crustal assimilations. Ore deposits and evaporates The Andes Mountains host large ore and salt deposits and some of their eastern fold and thrust belt acts as traps for commercially exploitable amounts of hydrocarbons. In the forelands of the Atacama Desert some of the largest porphyry copper mineralizations occur making Chile and Peru the first- and second-largest exporters of copper in the world. Porphyry copper in the western slopes of the Andes has been generated by hydrothermal fluids (mostly water) during the cooling of plutons or volcanic systems. The porphyry mineralization further benefited from the dry climate that let them largely out of the disturbing actions of meteoric water. The dry climate in the central western Andes has also led to the creation of extensive saltpeter deposits which were extensively mined until the invention of synthetic nitrates. Yet another result of the dry climate are the salars of Atacama and Uyuni, the first one being the largest source of lithium today and the second the world's largest reserve of the element. Early Mesozoic and Neogene plutonism in Bolivia's Cordillera Central created the Bolivian tin belt as well as the famous, now depleted, deposits of Cerro Rico de Potosí. History The Andes Mountains, initially inhabited by hunter-gatherers, experienced the development of agriculture and rise of politically centralised civilizations, which culminated in the establishment of the century-long Inca Empire. This all changed in the 16th century, when the Spanish conquistadors colonized the mountains in the advance of the mining economy. In tide of anti-imperialist nationalism, the Andes became the scene of a series of independence wars in the 19th century when rebel forces swept through the region to overthrow Spanish colonial rule. Since then, many former Spanish territories have become five independent Andean states. Climate and hydrology The climate in the Andes varies greatly depending on latitude, altitude, and proximity to the sea. Temperature, atmospheric pressure and humidity decrease in higher elevations. The southern section is rainy and cool, the central section is dry. The northern Andes are typically rainy and warm, with an average temperature of in Colombia. The climate is known to change drastically in rather short distances. Rainforests exist just kilometres away from the snow-covered peak Cotopaxi. The mountains have a large effect on the temperatures of nearby areas. The snow line depends on the location. It is at between in the tropical Ecuadorian, Colombian, Venezuelan, and northern Peruvian Andes, rising to in the drier mountains of southern Peru south to northern Chile south to about 30°S before descending to on Aconcagua at 32°S, at 40°S, at 50°S, and only in Tierra del Fuego at 55°S; from 50°S, several of the larger glaciers descend to sea level. The Andes of Chile and Argentina can be divided into two climatic and glaciological zones: the Dry Andes and the Wet Andes. Since the Dry Andes extend from the latitudes of Atacama Desert to the area of Maule River, precipitation is more sporadic and there are strong temperature oscillations. The line of equilibrium may shift drastically over short periods of time, leaving a whole glacier in the ablation area or in the accumulation area. In the high Andes of Central Chile and Mendoza Province, rock glaciers are larger and more common than glaciers; this is due to the high exposure to solar radiation. In these regions glaciers occur typically at higher altitudes than rock glaciers. The lowest active rock glacier occur at 900 m a.s.l. in Aconcagua. Though precipitation increases with the height, there are semiarid conditions in the nearly highest mountains of the Andes. This dry steppe climate is considered to be typical of the subtropical position at 32–34° S. The valley bottoms have no woods, just dwarf scrub. The largest glaciers, for example the Plomo glacier and the Horcones glaciers, do not even reach in length and have an only insignificant ice thickness. At glacial times, however, c. 20,000 years ago, the glaciers were over ten times longer. On the east side of this section of the Mendozina Andes, they flowed down to and on the west side to about above sea level. The massifs of Cerro Aconcagua (), Cerro Tupungato () and Nevado Juncal () are tens of kilometres away from each other and were connected by a joint ice stream network. The Andes' dendritic glacier arms, i.e. components of valley glaciers, were up to long, over thick and overspanned a vertical distance of . The climatic glacier snowline (ELA) was lowered from to at glacial times. Flora The Andean region cuts across several natural and floristic regions, due to its extension, from Caribbean Venezuela to cold, windy and wet Cape Horn passing through the hyperarid Atacama Desert. Rainforests and tropical dry forests used to encircle much of the northern Andes but are now greatly diminished, especially in the Chocó and inter-Andean valleys of Colombia. Opposite of the humid Andean slopes are the relatively dry Andean slopes in most of western Peru, Chile and Argentina. Along with several Interandean Valles, they are typically dominated by deciduous woodland, shrub and xeric vegetation, reaching the extreme in the slopes near the virtually lifeless Atacama Desert. About 30,000 species of vascular plants live in the Andes, with roughly half being endemic to the region, surpassing the diversity of any other hotspot. The small tree Cinchona pubescens, a source of quinine which is used to treat malaria, is found widely in the Andes as far south as Bolivia. Other important crops that originated from the Andes are tobacco and potatoes. The high-altitude Polylepis forests and woodlands are found in the Andean areas of Colombia, Ecuador, Peru, Bolivia and Chile. These trees, by locals referred to as Queñua, Yagual and other names, can be found at altitudes of above sea level. It remains unclear if the patchy distribution of these forests and woodlands is natural, or the result of clearing which began during the Incan period. Regardless, in modern times the clearance has accelerated, and the trees are now considered to be highly endangered, with some believing that as little as 10% of the original woodland remains. Fauna The Andes are rich in fauna: With almost 1,000 species, of which roughly 2/3 are endemic to the region, the Andes are the most important region in the world for amphibians. The diversity of animals in the Andes is high, with almost 600 species of mammals (13% endemic), more than 1,700 species of birds (about 1/3 endemic), more than 600 species of reptile (about 45% endemic), and almost 400 species of fish (about 1/3 endemic). The vicuña and guanaco can be found living in the Altiplano, while the closely related domesticated llama and alpaca are widely kept by locals as pack animals and for their meat and wool. The crepuscular (active during dawn and dusk) chinchillas, two threatened members of the rodent order, inhabit the Andes' alpine regions. The Andean condor, the largest bird of its kind in the Western Hemisphere, occurs throughout much of the Andes but generally in very low densities. Other animals found in the relatively open habitats of the high Andes include the huemul, cougar, foxes in the genus Pseudalopex, and, for birds, certain species of tinamous (notably members of the genus Nothoprocta), Andean goose, giant coot, flamingos (mainly associated with hypersaline lakes), lesser rhea, Andean flicker, diademed sandpiper-plover, miners, sierra-finches and diuca-finches. Lake Titicaca hosts several endemics, among them the highly endangered Titicaca flightless grebe and Titicaca water frog. A few species of hummingbirds, notably some hillstars, can be seen at altitudes above , but far higher diversities can be found at lower altitudes, especially in the humid Andean forests ("cloud forests") growing on slopes in Colombia, Ecuador, Peru, Bolivia and far northwestern Argentina. These forest-types, which includes the Yungas and parts of the Chocó, are very rich in flora and fauna, although few large mammals exist, exceptions being the threatened mountain tapir, spectacled bear and yellow-tailed woolly monkey. Birds of humid Andean forests include mountain-toucans, quetzals and the Andean cock-of-the-rock, while mixed species flocks dominated by tanagers and furnariids commonly are seen – in contrast to several vocal but typically cryptic species of wrens, tapaculos and antpittas. A number of species such as the royal cinclodes and white-browed tit-spinetail are associated with Polylepis, and consequently also threatened. Human activity The Andes Mountains form a north–south axis of cultural influences. A long series of cultural development culminated in the expansion of the Inca civilization and Inca Empire in the central Andes during the 15th century. The Incas formed this civilization through imperialistic militarism as well as careful and meticulous governmental management. The government sponsored the construction of aqueducts and roads in addition to preexisting installations. Some of these constructions are still in existence today. Devastated by European diseases and by civil war, the Incas were defeated in 1532 by an alliance composed of tens of thousands of allies from nations they had subjugated (e.g. Huancas, Chachapoyas, Cañaris) and a small army of 180 Spaniards led by Francisco Pizarro. One of the few Inca sites the Spanish never found in their conquest was Machu Picchu, which lay hidden on a peak on the eastern edge of the Andes where they descend to the Amazon. The main surviving languages of the Andean peoples are those of the Quechua and Aymara language families. Woodbine Parish and Joseph Barclay Pentland surveyed a large part of the Bolivian Andes from 1826 to 1827. Cities In modern times, the largest cities in the Andes are Bogotá, with a metropolitan population of over ten million, and Santiago, Medellín, Cali, and Quito. Lima is a coastal city adjacent to the Andes and is the largest city of all Andean countries. It is the seat of the Andean Community of Nations. La Paz, Bolivia's seat of government, is the highest capital city in the world, at an elevation of approximately . Parts of the La Paz conurbation, including the city of El Alto, extend up to . Other cities in or near the Andes include Bariloche, Catamarca, Jujuy, Mendoza, Salta, San Juan, Tucumán, and Ushuaia in Argentina; Calama and Rancagua in Chile; Cochabamba, Oruro, Potosí, Sucre, Sacaba, Tarija, and Yacuiba in Bolivia; Arequipa, Cajamarca, Cusco, Huancayo, Huánuco, Huaraz, Juliaca, and Puno in Peru; Ambato, Cuenca, Ibarra, Latacunga, Loja, Riobamba and Tulcán in Ecuador; Armenia, Cúcuta, Bucaramanga, Duitama, Ibagué, Ipiales, Manizales, Palmira, Pasto, Pereira, Popayán, Sogamoso, Tunja, and Villavicencio in Colombia; and Barquisimeto, La Grita, Mérida, San Cristóbal, Tovar, Trujillo, and Valera in Venezuela. The cities of Caracas, Valencia, and Maracay are in the Venezuelan Coastal Range, which is a debatable extension of the Andes at the northern extremity of South America. Transportation Cities and large towns are connected with asphalt-paved roads, while smaller towns are often connected by dirt roads, which may require a four-wheel-drive vehicle. The rough terrain has historically put the costs of building highways and railroads that cross the Andes out of reach of most neighboring countries, even with modern civil engineering practices. For example, the main crossover of the Andes between Argentina and Chile is still accomplished through the Paso Internacional Los Libertadores. Only recently the ends of some highways that came rather close to one another from the east and the west have been connected. Much of the transportation of passengers is done via aircraft. However, there is one railroad that connects Chile with Peru via the Andes, and there are others that make the same connection via southern Bolivia. See railroad maps of that region. There are multiple highways in Bolivia that cross the Andes. Some of these were built during a period of war between Bolivia and Paraguay, in order to transport Bolivian troops and their supplies to the war front in the lowlands of southeastern Bolivia and western Paraguay. For decades, Chile claimed ownership of land on the eastern side of the Andes. However, these claims were given up in about 1870 during the War of the Pacific between Chile and the allied Bolivia and Peru, in a diplomatic deal to keep Peru out of the war. The Chilean Army and Chilean Navy defeated the combined forces of Bolivia and Peru, and Chile took over Bolivia's only province on the Pacific Coast, some land from Peru that was returned to Peru decades later. Bolivia has been a completely landlocked country ever since. It mostly uses seaports in eastern Argentina and Uruguay for international trade because its diplomatic relations with Chile have been suspended since 1978. Because of the tortuous terrain in places, villages and towns in the mountains—to which travel via motorized vehicles is of little use—are still located in the high Andes of Chile, Bolivia, Peru, and Ecuador. Locally, the relatives of the camel, the llama, and the alpaca continue to carry out important uses as pack animals, but this use has generally diminished in modern times. Donkeys, mules, and horses are also useful. Agriculture The ancient peoples of the Andes such as the Incas have practiced irrigation techniques for over 6,000 years. Because of the mountain slopes, terracing has been a common practice. Terracing, however, was only extensively employed after Incan imperial expansions to fuel their expanding realm. The potato holds a very important role as an internally consumed staple crop. Maize was also an important crop for these people, and was used for the production of chicha, important to Andean native people. Currently, tobacco, cotton and coffee are the main export crops. Coca, despite eradication programmes in some countries, remains an important crop for legal local use in a mildly stimulating herbal tea, and, both controversially and illegally, for the production of cocaine. Irrigation In unirrigated land, pasture is the most common type of land use. In the rainy season (summer), part of the rangeland is used for cropping (mainly potatoes, barley, broad beans and wheat). Irrigation is helpful in advancing the sowing data of the summer crops which guarantees an early yield in the period of food shortage. Also, by early sowing, maize can be cultivated higher up in the mountains (up to ). In addition, it makes cropping in the dry season (winter) possible and allows the cultivation of frost-resistant vegetable crops like onion and carrot. Mining The Andes rose to fame for their mineral wealth during the Spanish conquest of South America. Although Andean Amerindian peoples crafted ceremonial jewelry of gold and other metals, the mineralizations of the Andes were first mined on a large scale after the Spanish arrival. Potosí in present-day Bolivia and Cerro de Pasco in Peru were among the principal mines of the Spanish Empire in the New World. Río de la Plata and Argentina derive their names from the silver of Potosí. Currently, mining in the Andes of Chile and Peru places these countries as the first and second major producers of copper in the world. Peru also contains the 4th largest goldmine in the world: the Yanacocha. The Bolivian Andes produce principally tin although historically silver mining had a huge impact on the economy of 17th century Europe. There is a long history of mining in the Andes, from the Spanish silver mines in Potosí in the 16th century to the vast current porphyry copper deposits of Chuquicamata and Escondida in Chile and Toquepala in Peru. Other metals including iron, gold, and tin in addition to non-metallic resources are important. Peaks This list contains some of the major peaks in the Andes mountain range. The highest peak is Aconcagua of Argentina (see below). Argentina Aconcagua, Cerro Bonete, Galán, Mercedario, Pissis, Border between Argentina and Chile Cerro Bayo, Cerro Fitz Roy, or 3,405 m, Patagonia, also known as Cerro Chaltén Cerro Escorial, Cordón del Azufre, Falso Azufre, Incahuasi, Lastarria, Llullaillaco, Maipo, Marmolejo, Ojos del Salado, Olca, Sierra Nevada de Lagunas Bravas, Socompa, Nevado Tres Cruces, (south summit) (III Region) Tronador, Tupungato, Nacimiento, Bolivia Janq'u Uma, Cabaraya, Chacaltaya, Wayna Potosí, Illampu, Illimani, Laram Q'awa, Macizo de Pacuni, Nevado Anallajsi, Nevado Sajama, Patilla Pata, Tata Sabaya, Border between Bolivia and Chile Acotango, Michincha, Iru Phutunqu, Licancabur, Olca, Parinacota, Paruma, Pomerape, Chile Monte San Valentin, Cerro Paine Grande, Cerro Macá, c. Monte Darwin, c. Volcan Hudson, c. Cerro Castillo Dynevor, c. Mount Tarn, c. Polleras, c. Acamarachi, c. Colombia Nevado del Huila, Nevado del Ruiz, Nevado del Tolima, Pico Pan de Azúcar, Ritacuba Negro, Nevado del Cumbal, Cerro Negro de Mayasquer, Ritacuba Blanco, Nevado del Quindío, Puracé, Santa Isabel, Doña Juana, Galeras, Azufral, Ecuador Antisana, Cayambe, Chiles, Chimborazo, Corazón, Cotopaxi, El Altar, Illiniza, Pichincha, Quilotoa, Reventador, Sangay, Tungurahua, Peru Alpamayo, Artesonraju, Carnicero, Chumpe, Coropuna, El Misti, El Toro, Huandoy, Huascarán, Jirishanca, Pumasillo, Rasac, Rondoy, Sarapo, Salcantay, Seria Norte, Siula Grande, Huaytapallana, Yerupaja, Yerupaja Chico, Venezuela Pico Bolívar, Pico Humboldt, Pico Bonpland, Pico La Concha, Pico Piedras Blancas, Pico El Águila, Pico El Toro Pico El León Pico Mucuñuque See also Andean Geology—a scientific journal Andesite line Apu (god) Mountain passes of the Andes List of mountain ranges Notes References Biggar, J. (2005). The Andes: A Guide For Climbers. 3rd. edition. Andes: Kirkcudbrightshire. de Roy, T. (2005). The Andes: As the Condor Flies. Firefly books: Richmond Hill. Fjeldså, J. & N. Krabbe (1990). The Birds of the High Andes. Zoological Museum, University of Copenhagen: Fjeldså, J. & M. Kessler (1996). Conserving the biological diversity of Polylepis woodlands of the highlands on Peru and Bolivia, a contribution to sustainable natural resource management in the Andes. NORDECO: Copenhagen. Bibliography External links University of Arizona: Andes geology Blueplanetbiomes.org: Climate and animal life of the Andes Discover-peru.org: Regions and Microclimates in the Andes Peaklist.org: Complete list of mountains in South America with an elevation at/above Mountain ranges of South America Regions of South America Physiographic divisions

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

Ancylopoda

Ancylopoda is a group of browsing, herbivorous, mammals in the Perissodactyla that show long, curved and cleft claws. Morphological evidence indicates the Ancylopoda diverged from the tapirs, rhinoceroses and horses (Euperissodactyla) after the Brontotheria; however, earlier authorities such as Osborn sometimes considered the Ancylopoda to be outside Perissodactyla or, as was popular more recently, to be related to Brontotheriidae. Macrotherium, which is typically from the middle Miocene of Sansan, in Gers, France, may indicate a distinct genus. Limb-bones resembling those of Macrotherium, but relatively stouter, have been described from the Pliocene beds of Attica and Samos as Ancylotherium. In the Americas, the names Morothorium and Moropus have been applied to similar bones, in the belief that they indicated Xenarthrans. Macrotherium magnum must have been an animal of about nine feet in length. References Chalicotheres Eocene first appearances Pleistocene extinctions

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

Anchor

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

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https://en.wikipedia.org/wiki/Anbar%20%28town%29

Anbar (town)

Anbar (, ,) also known by its original ancient name, Peroz-Shapur, was an ancient and medieval town in central Iraq. It played a role in the Roman–Persian Wars of the 3rd–4th centuries, and briefly became the capital of the Abbasid Caliphate before the founding of Baghdad in 762. It remained a moderately prosperous town through the 10th century, but quickly declined thereafter. As a local administrative centre, it survived until the 14th century, but was later abandoned. Its ruins are near modern Fallujah. The city gives its name to the Al-Anbar Governorate. History Origins The city is located on the left bank of the Middle Euphrates, at the junction with the Nahr Isa canal, the first of the navigable canals that link the Euphrates to the River Tigris to the east. The origins of the city are unknown, but ancient, perhaps dating to the Babylonian era and even earlier: the local artificial mound of Tell Aswad dates to . Sasanian period The town was originally known as Misiche (Greek: ), Mesiche (), or Massice ( mšyk; mšyk). As a major crossing point of the Euphrates, and occupying the northernmost point of the complex irrigation network of the Sawad, the town was of considerable strategic significance. As the western gate to central Mesopotamia, it was fortified by the Sasanian ruler Shapur I () to shield his capital, Ctesiphon, from the Roman Empire. After his decisive defeat of the Roman emperor Gordian III at the Battle of Misiche in 244, Shapur renamed the town to Peroz-Shapur (Pērōz-Šāpūr or Pērōz-Šābuhr, from , meaning "victorious Shapur"; in ; in ). It became known as Pirisapora or Bersabora () to the Greeks and Romans. The city was fortified by a double wall, possibly through the use of Roman prisoner labour; it was sacked and burned after an agreement with its garrison in March 363 by the Roman emperor Julian during his invasion of the Sasanian Empire. It was rebuilt by Shapur II. By 420, it is attested as a bishopric, both for the Church of the East and for the Syriac Orthodox Church. The town's garrison was Persian, but it also contained sizeable Arab and Jewish populations. Anbar was adjacent or identical to the Babylonian Jewish center of Nehardea (), and lies a short distance from the present-day town of Fallujah, formerly the Babylonian Jewish center of Pumbedita (). Islamic period The city fell to the Rashidun Caliphate in July 633, after a fiercely fought siege. The Arabs retained the name (Fīrūz Shābūr) for the surrounding district, but the town itself became known as Anbar (Middle Persian word for "granary" or "storehouse") from the granaries in its citadel, a name that had appeared already during the 6th century. According to Baladhuri, the third mosque to be built in Iraq was erected in the city by Sa'd ibn Abi Waqqas. Ibn Abi Waqqas initially considered Anbar as a candidate for the location of one of the first Muslim garrison towns, but the fever and fleas endemic in the area persuaded him otherwise. According to medieval Arabic sources, most of the inhabitants of the town migrated north to found the city of Hdatta south of Mosul. The famous governor al-Hajjaj ibn Yusuf cleared the canals of the city. Abu'l-Abbas as-Saffah (), the founder of the Abbasid Caliphate, made it his capital in 752, constructing a new town half a farsakh () to the north for his Khurasani troops. There he died and was buried at the palace he had built. His successor, al-Mansur (), remained in the city until the founding of Baghdad in 762. The Abbasids also dug the great Nahr Isa canal to the south of the city, which carried water and commerce east to Baghdad. The Nahr al-Saqlawiyya or Nahr al-Qarma canal, which branches off from the Euphrates to the west of the city, is sometimes erroneously held to be the Nahr Isa, but it is more likely that it is to be identified with the pre-Islamic Nahr al-Rufayl. It continued to be a place of much importance throughout the Abbasid period. Caliph Harun al-Rashid () stayed at the town in 799 and in 803. The town's prosperity was founded on agricultural activities, but also on trade between Iraq and Syria. The town was still prosperous in the early 9th century, but the decline of Abbasid authority during the later 9th century exposed it to Bedouin attacks in 882 and 899. In 927, the Qarmatians under Abu Tahir al-Jannabi sacked the city during their invasion of Iraq, and the devastation was compounded by another Bedouin attack two years later. The town's decline accelerated after that: while the early 10th-century geographer Istakhri still calls the town modest but populous, with the ruins of the buildings of as-Saffah still visible, Ibn Hawqal and al-Maqdisi, who wrote a generation later, attest to its decline, and the diminution of its population. The town was sacked again in 1262 by the Mongols under Kerboka. The Ilkhanids retained Anbar as an administrative centre, a role it retained until the first half of the 14th century; the Ilkhanid minister Shams al-Din Juvayni had a canal dug from the city to Najaf, and the city was surrounded by a wall of sun-dried bricks. Ecclesiastical history Anbar used to host an Assyrian community from the fifth century: the town was the seat of a bishopric of the Church of the East. The names of fourteen of its bishops of the period 486–1074 are known, three of whom became Chaldean Patriarchs of Babylon. Narses Simeon Salibazachi Paul Theodosius John Enos 890 Elias Jaballaha Sebarjesus Elias II Unnamed bishop Mundar Maris Zacharias Titular see Anbar is listed by the Catholic Church as a titular see of the Chaldean Catholic Church, established as titular bishopric in 1980. It has had the following incumbents: Titular Archbishop Stéphane Katchou (1980.10.03 – 1981.11.10), as Coadjutor Archeparch of Bassorah of the Chaldeans (Iraq) (1980.10.03 – 1981.11.10) Titular Bishop Ibrahim Namo Ibrahim (1982.01.11 – 1985.08.03), as Apostolic Exarch in the United States of America (1982.01.11 – 1985.08.03) Titular Bishop Shlemon Warduni (since 2001.01.12), Curial Bishop of the Chaldean Catholic Church Today It is now entirely deserted, occupied only by mounds of ruins, whose great number indicate the city's former importance. Its ruins are northwest of Fallujah, with a circumference of some . The remains include traces of the late medieval wall, a square fortification, and the early Islamic mosque. Citations General sources GCatholic, with titular incumbent biography links Al Anbar Governorate Dioceses of the Church of the East Eastern Catholic titular sees Former populated places in Iraq Medieval Iraq Abbasid Caliphate Capitals in Asia Archaeological sites in Iraq

1360

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

Anazarbus

Anazarbus (, medieval Ain Zarba; modern Anavarza; ) was an ancient Cilician city. Under the late Roman Empire, it was the capital of Cilicia Secunda. Roman emperor Justinian I rebuilt the city in 527 after a strong earthquake hit it. It was destroyed in 1374 by the forces of the Mamluk Empire, after their conquest of Cilician Armenia. Location It was situated in Anatolia in modern Turkey, in the present Çukurova (or classical Aleian plain) about 15 km west of the main stream of the present Ceyhan River (or classical Pyramus river) and near its tributary the Sempas Su. A lofty isolated ridge formed its acropolis. Though some of the masonry in the ruins is certainly pre-Roman, the Suda's identification of it with Cyinda, famous as a treasure city in the wars of Eumenes of Cardia, cannot be accepted in the face of Strabo's express location of Cyinda in western Cilicia. History According to the Suda, the original name of the place was Cyinda or Kyinda or Quinda (); and that it was next called Diocaesarea (Διοκαισάρεια). A city in Cilicia called Kundu rebelled against the Assyrian king Esarhaddon in 7th century BC, but it's unclear if there is a connection. At least it's known a city called Anazarbus (Ἀνάζαρβος) and Anazarba (Ἀνάζαρβα) and Anazarbon (Ἀνάζαρβον), situated on the river Pyramus, existed in the first century BC and was a part of the small client-kingdom of Tarcondimotus I until it was annexed by Rome. How the city obtained the name is a matter of conjecture. According to Stephanus of Byzantium, after the city was destroyed by an earthquake, the emperor Nerva sent thither one Anazarbus, a man of senatorial rank, who rebuilt the city, and gave to it his own name. This account cannot be accurate, as Valesius remarks, for it was called Anazarbus in Pliny's time. Dioscorides is called a native of Anazarbus; but the period of Dioscorides is not certain. It was also the home of the poet Oppian. Its later name was Caesarea ad Anazarbum, and there are many medals of the place in which it is both named Anazarbus and Caesarea at or under Anazarbus. On the division of Cilicia it became the chief place of the Roman province of Cilicia Secunda, with the title of Metropolis. Early in the sixth century, in the reign of Eastern Roman emperor Justin I, it was named Justinopolis or Ioustinoupolis (Ἰουστινούπολις). The city suffered from an earthquake in 526 and was rebuilt by Justinian I and renamed Justinianopolis or Ioustinianoupolis (Ἰουστινιανούπολις); but the old name persisted, and when Thoros I, king of Lesser Armenia, made it his capital early in the 12th century, it was known as Anazarva. Its great natural strength and situation, not far from the mouth of the Sis pass, and near the great road which debouched from the Cilician Gates, made Anazarbus play a considerable part in the struggles between the Eastern Roman Empire and the early Muslim invaders. It had been rebuilt by Harun al-Rashid in 796, refortified at great expense by the Hamdanid Sayf al-Dawla (mid-10th century) and again destroyed in 962 by Nikephoros II Phokas. In the 11th century it was again a major fortress, comparable to Tarsos and Marash, and belonged to the realm of Philaretos Brachamios before it was captured around 1084 by the Seljuk Turks. In late 1097 or early 1098 it was captured by the armies of the First Crusade and after the conquest of Antioch it was incorporated into Bohemond of Taranto's Principality of Antioch. The site briefly exchanged hands between the Byzantine Empire and Armenians, until it was formally part of the Armenian Kingdom of Cilicia. Anazarbus was one of a chain of Armenian fortifications stretching through Cilicia. The castle of Sis (modern Kozan, Adana) lies to the north while Tumlu Castle and Yilankale are to the south, and the fortresses of Amouda and Sarvandikar are to the east. The Mamluk Empire of Egypt finally destroyed the city in 1374. Remains The Crusaders are probably responsible for the construction of an impressive donjon atop the center of the outcrop. Most of the remaining fortifications, including the curtain walls, massive horse-shaped towers, undercrofts, cisterns, and free-standing structures date from the Armenian periods of occupation, which began with the arrival of the Rubenid Baron T‛oros I, . Within the fortress are two Armenian chapels and the magnificent (but severely damaged) three-aisle church built by T‛oros I to celebrate his conquests. The church was once surrounded by a continuous, well-executed dedicatory inscription in Armenian. The present wall of the lower city is of late construction. It encloses a mass of ruins conspicuous in which are a fine triumphal arch, the colonnades of two streets, a gymnasium, etc. A stadium and a theatre lie outside the walls to the south. The remains of the acropolis fortifications are very interesting, including roads and ditches hewn in the rock. There are no notable structures in the upper town. For picturesqueness the site is not equaled in Cilicia, and it is worthwhile to trace the three fine aqueducts to their sources. A necropolis on the escarpment to the south of the curtain wall can also be seen complete with signs of illegal modern excavations. A modest Turkish farming village (Dilekkaya) lies to the southwest of the ancient city. A small outdoor museum with some of the artifacts collected in the area can be viewed for a small fee. Also nearby are some beautiful mosaics discovered in a farmers field. A visit in December 2002 showed that the three aqueducts mentioned above have been nearly completely destroyed. Only small, isolated sections are left standing with the largest portion lying in a pile of rubble that stretches the length of where the aqueducts once stood. A powerful earthquake that struck the area in 1945 is thought to be responsible for the destruction. In 2013, excavations uncovered the first known colonnaded double-lane road of the ancient world, 34 meters wide and 2700 meters long, also uncovered the ruins of a church and a bathhouse. In 2017, archaeologists discovered a limestone statue of the goddess Hygieia and the god Eros. The statue is thought to date to the third or fourth century B.C. Ecclesiastical history Anazarbus was the capital and so also from 553 (the date of the Second Council of Constantinople) the metropolitan see of the Late Roman province of Cilicia Secunda. In the 4th century, one of the bishops of Anazarbus was Athanasius, a "consistent expounder of the theology of Arius." His theological opponent, Athanasius of Alexandria, in De Synodis 17, 1 refers to Anazarbus as Ναζαρβῶν. Maximin of Anazarbus attended the Council of Chalcedon. A 6th century Notitia Episcopatuum indicates that it had as suffragan sees Epiphania, Alexandria Minor, Irenopolis, Flavias, Castabala and Aegeae. Rhosus was also subject to Anazarbus, but after the 6th century was made exempt, and Mopsuestia was raised to the rank of autocephalous metropolitan see, though without suffragans. Latin Catholic titular see The titular archbishopric was revived in the 18th century as a see of the Latin Catholic church, Anazarbus. It is vacant, having had the following incumbents, generally of the highest (Metropolitan) rank, with an episcopal (lowest rank) exception: Titular Archbishop Giuseppe Maria Saporiti (1726.04.08 – 1743.12.02) Titular Bishop Isidro Alfonso Cavanillas (1753.04.09 – 1755.05.12) Titular Archbishop Gerolamo Formagliari (1760.07.21 – 1781) Titular Archbishop Romain-Frédéric Gallard (1839.02.21 – 1839.09.28) Titular Archbishop Andon Bedros Hassoun (1842.06.07 – 1846.08.02), as Coadjutor Archeparch of Istanbul of the Armenians (Turkey) (1842.06.07 – 1846.08.02), succeeded as Archeparch of Istanbul of the Armenians (Turkey) (1846.08.02 – 1866.09.14), later Patriarch of Cilicia of the Armenians (Lebanon) ([1866.09.14] 1867.07.12 – 1881.06), created Cardinal-Priest of Ss. Vitale, Valeria, Gervasio e Protasio (1880.12.16 – 1884.02.28) Titular Archbishop Giorgio Labella, Friars Minor (O.F.M.) (1847.06.04 – 1860.10.27) Titular Archbishop Charles Petre Eyre (1868.12.03 – 1878.03.15) Titular Archbishop John Baptist Salpointe (1884.04.22 – 1885.08.18) Titular Archbishop Michael Logue (1887.04.19 – 1887.12.03) (later Cardinal)* Titular Archbishop François Laurencin (1888.06.01 – 1892.12.18) Titular Archbishop Joaquín Larraín Gandarillas (1893.06.15 – 1897.09.26) Titular Archbishop Raimondo Ingheo (1907.12.16 – 1911.07.08) Titular Archbishop Cláudio José Gonçalves Ponce de Leon, Lazarists (C.M.) (1912.01.09 – 1924.05.26) Titular Archbishop Raymund Netzhammer, Benedictine Order(] O.S.B.) (1924.07.14 – 1945.09.18) Titular Archbishop Michele Akras (1945.10.27 – 1947.02.05) Titular Archbishop Heinrich Döring (ハインリヒ・デーリング), S.J. (1948.01.15 – 1951.12.17) Titular Archbishop Joseph-Marie Le Gouaze (1955.06.24 – 1964.07.31) Armenian Catholic titular see In the 19th century, an Armenian Catholic titular bishopric of Anazarbus (of the Armenians) (Anazarbus degli Armeni in Curiate Italian) was established. It was a suppressed in 1933, having had a single incumbent, of the intermediary (archiepiscopal) rank : Titular Archbishop Avedis Arpiarian (1898.04.05 – 1911.08.27), previously Eparch of Kharput of the Armenians (1890.09.23 – 1898.04.05); later Eparch of Marasc of the Armenians (1911.08.27 – 1928.06.29), Auxiliary Eparch of the patriarchate Cilicia of the Armenians (Lebanon) (1928.06.29 – 1931.10.17), Armenian Catholic Patriarch of Cilicia (Lebanon) ([1931.10.17] 1933.03.13 – 1937.10.26) Notable locals Pedanius Dioscorides (1st century) Greek physician, pharmacologist and botanist St. Domnina of Anazarbus St. Theodula of Anazarbus See also Diocese of Alexandretta References Citations General references External links GCatholic Latin titular see GCatholic Armenian Catholic former titular see Carefully documented photographic survey and plan of Anazarbus Castle Ancient Greek archaeological sites in Turkey Former populated places in Cilicia Armenian Kingdom of Cilicia Catholic titular sees in Asia Eastern Catholic titular sees History of Adana Province Roman sites in Turkey Tourist attractions in Adana Province World Heritage Tentative List for Turkey Defunct dioceses of the Ecumenical Patriarchate of Constantinople Populated places in ancient Cilicia

1361

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

Anagram

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

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https://en.wikipedia.org/wiki/Anadyr%20%28river%29

Anadyr (river)

The Anadyr (; Yukaghir: Онандырь; ) is a river in the far northeast of Siberia which flows into the Gulf of Anadyr of the Bering Sea and drains much of the interior of Chukotka Autonomous Okrug. Its basin corresponds to the Anadyrsky District of Chukotka. Geography The Anadyr is long and has a basin of . It is frozen from October to late May and has a maximum flow in June with the snowmelt. It is navigable in small boats for about to near Markovo. West of Markovo it is in the Anadyr Highlands (moderate mountains and valleys with a few trees) and east of Markovo it moves into the Anadyr Lowlands (very flat treeless tundra with lakes and bogs). The drop from Markovo to the sea is less than . It rises at about 67°N latitude and 171°E longitude in the Anadyr Highlands, near the headwaters of the Maly Anyuy, flows southwest receiving the waters of the rivers Yablon and Yeropol, turns east around the Shchuchy Range and passes Markvovo and the old site of Anadyrsk, turns north and east and receives the Mayn from the south, thereby encircling the Lebediny Zakaznik, turns northeast to receive the Belaya from the north in the Parapol-Belsky Lowlands, then past Ust-Belaya it turns southeast into the Anadyr Lowlands past the Ust-Tanyurer Zakaznik and receives the Tanyurer from the north. At Lake Krasnoye, it turns east and flows into the Onemen Bay of the Anadyr Estuary. If the Onemen Bay is considered part of the river, it also receives the Velikaya from the south and the Kanchalan from the north. Other important tributaries are the Yablon, Yeropol and Mamolina from the right and the Chineyveyem and Ubiyenka from the left. Its basin is surrounded by the Amguema and Palyavaam basins to the north, the Bolshoy Anyuy, Oloy and Kolyma basins to the northwest, and the Penzhina basin to the southwest. History In 1648, Semyon Dezhnev reached the mouth of the Anadyr after being shipwrecked on the coast. In 1649, he went upriver and built winter quarters at Anadyrsk. For the next 100 years, the Anadyr was the main route from the Arctic to the Pacific and Kamchatka. In the 18th century, the Anadyr was described by the polar explorer Dmitry Laptev. Ecology The country through which it passes is thinly populated, and is dominated by tundra, with a rich variety of plant life. Much of the region's landscapes are dominated by rugged mountains. For nine months of the year the ground is covered with snow, and the frozen rivers become navigable roads. George Kennan, an American working on the Western Union Telegraph Expedition in the late 1860s, found that dog sled travel on the lower Anadyr was limited by lack of firewood. Reindeer, upon which the local inhabitants subsisted, were once found in considerable numbers, but the domestic reindeer population has collapsed dramatically since the reorganization and privatization of state-run collective farms beginning in 1992. As herds of domestic reindeer have declined, herds of wild caribou have increased. There are ten species of salmon inhabiting the Anadyr river basin. Every year, on the last Sunday in April, there is an ice fishing competition in the frozen estuarine waters of the Anadyr's mouth. This festival is locally known as Korfest. The area is a summering place for a number of migratory birds including brent geese, Eurasian wigeons, and the pintails of California. See also Operation Anadyr Sources Footnotes Notes References External links "Tourist and environmental information" Chukotka Autonomous Okrug website, in English "Russia Far East: Anadyr River" Wild Salmon Center Anadyr River Watershed "Snezhnoye: a village on the Anadyr' River" Rivers of Chukotka Autonomous Okrug Drainage basins of the Bering Sea

1363

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

André-Marie Ampère

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

1365

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

Ammonia

Ammonia is an inorganic compound of nitrogen and hydrogen with the formula . A stable binary hydride, and the simplest pnictogen hydride, ammonia is a colourless gas with a distinct pungent smell. Biologically, it is a common nitrogenous waste, particularly among aquatic organisms, and it contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to 45% of the world's food and fertilizers. Around 70% of ammonia is used to make fertilisers in various forms and composition, such as urea and Diammonium phosphate. Ammonia in pure form is also applied directly into the soil. Ammonia, either directly or indirectly, is also a building block for the synthesis of many pharmaceutical products and is used in many commercial cleaning products. It is mainly collected by downward displacement of both air and water. Although common in nature—both terrestrially and in the outer planets of the Solar System—and in wide use, ammonia is both caustic and hazardous in its concentrated form. In many countries it is classified as an extremely hazardous substance, and is subject to strict reporting requirements by facilities which produce, store, or use it in significant quantities. The global industrial production of ammonia in 2018 was 175 million tonnes, with no significant change relative to the 2013 global industrial production of 175 million tonnes. In 2021 this was 235 million tonnes, with very little being made within the United States. Industrial ammonia is sold either as ammonia liquor (usually 28% ammonia in water) or as pressurized or refrigerated anhydrous liquid ammonia transported in tank cars or cylinders. For fundamental reasons, the production of ammonia from the elements hydrogen and nitrogen is difficult, requiring high pressures and high temperatures. The Haber process that enabled industrial production was invented at the beginning of the 20th century, revolutionizing agriculture. boils at at a pressure of one atmosphere, so the liquid must be stored under pressure or at low temperature. Household ammonia or ammonium hydroxide is a solution of in water. The concentration of such solutions is measured in units of the Baumé scale (density), with 26 degrees Baumé (about 30% of ammonia by weight at ) being the typical high-concentration commercial product. Etymology Pliny, in Book XXXI of his Natural History, refers to a salt named hammoniacum, so called because of its proximity to the nearby Temple of Jupiter Amun (Greek Ἄμμων Ammon) in the Roman province of Cyrenaica. However, the description Pliny gives of the salt does not conform to the properties of ammonium chloride. According to Herbert Hoover's commentary in his English translation of Georgius Agricola's De re metallica, it is likely to have been common sea salt. In any case, that salt ultimately gave ammonia and ammonium compounds their name. Roman visitors to oracle temple of Amun in Siwa oasis collected a white crystalline material from the ceiling and walls caused by various pollutants. This white crystalline salt was called "salt of Ammon" (sal ammoniac). Joseph Priestley noticed that when this salt reacted with lime, a vapor was released, which he termed as Ammonia. Natural occurrence Ammonia is a chemical found in trace quantities on Earth, being produced from nitrogenous animal and vegetable matter. Ammonia and ammonium salts are also found in small quantities in rainwater, whereas ammonium chloride (sal ammoniac), and ammonium sulfate are found in volcanic districts. Crystals of ammonium bicarbonate have been found in Patagonia guano. Ammonia is also found throughout the Solar System on Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto, among other places: on smaller, icy bodies such as Pluto, ammonia can act as a geologically important antifreeze, as a mixture of water and ammonia can have a melting point as low as if the ammonia concentration is high enough and thus allow such bodies to retain internal oceans and active geology at a far lower temperature than would be possible with water alone. Substances containing ammonia, or those that are similar to it, are called ammoniacal. Properties Ammonia is a colourless gas with a characteristically pungent smell. It is lighter than air, its density being 0.589 times that of air. It is easily liquefied due to the strong hydrogen bonding between molecules. Gaseous ammonia turns to the colourless liquid which boils at , and freezes to colourless crystals at . Few data are available at very high temperatures and pressures, such as supercritical conditions. Solid The crystal symmetry is cubic, Pearson symbol cP16, space group P213 No.198, lattice constant 0.5125 nm. Liquid Liquid ammonia possesses strong ionising powers reflecting its high ε of 22. Liquid ammonia has a very high standard enthalpy change of vaporization (23.35 kJ/mol, for comparison water 40.65 kJ/mol, methane 8.19 kJ/mol, phosphine 14.6 kJ/mol) and can therefore be used in laboratories in uninsulated vessels without additional refrigeration. See liquid ammonia as a solvent. Solvent properties Ammonia readily dissolves in water. In an aqueous solution, it can be expelled by boiling. The aqueous solution of ammonia is basic. The maximum concentration of ammonia in water (a saturated solution) has a density of 0.880 g/cm3 and is often known as '.880 ammonia'. Decomposition At high temperature and in the presence of a suitable catalyst or in a pressurized vessel with constant volume and high temperature (e.g. ), ammonia is decomposed into its constituent elements. Decomposition of ammonia is a slightly endothermic process requiring 23 kJ/mol (5.5 kcal/mol) of ammonia, and yields hydrogen and nitrogen gas. Ammonia can also be used as a source of hydrogen for acid fuel cells if the unreacted ammonia can be removed. Ruthenium and platinum catalysts were found to be the most active, whereas supported Ni catalysts were less active. Table of thermal and physical properties of saturated liquid ammonia: Table of thermal and physical properties of ammonia () at atmospheric pressure: Structure The ammonia molecule has a trigonal pyramidal shape as predicted by the valence shell electron pair repulsion theory (VSEPR theory) with an experimentally determined bond angle of 106.7°. The central nitrogen atom has five outer electrons with an additional electron from each hydrogen atom. This gives a total of eight electrons, or four electron pairs that are arranged tetrahedrally. Three of these electron pairs are used as bond pairs, which leaves one lone pair of electrons. The lone pair repels more strongly than bond pairs, therefore the bond angle is not 109.5°, as expected for a regular tetrahedral arrangement, but 106.8°. This shape gives the molecule a dipole moment and makes it polar. The molecule's polarity, and especially, its ability to form hydrogen bonds, makes ammonia highly miscible with water. The lone pair makes ammonia a base, a proton acceptor. Ammonia is moderately basic; a 1.0 M aqueous solution has a pH of 11.6, and if a strong acid is added to such a solution until the solution is neutral (pH = 7), 99.4% of the ammonia molecules are protonated. Temperature and salinity also affect the proportion of ammonium . The latter has the shape of a regular tetrahedron and is isoelectronic with methane. The ammonia molecule readily undergoes nitrogen inversion at room temperature; a useful analogy is an umbrella turning itself inside out in a strong wind. The energy barrier to this inversion is 24.7 kJ/mol, and the resonance frequency is 23.79 GHz, corresponding to microwave radiation of a wavelength of 1.260 cm. The absorption at this frequency was the first microwave spectrum to be observed and was used in the first maser. Amphotericity One of the most characteristic properties of ammonia is its basicity. Ammonia is considered to be a weak base. It combines with acids to form ammonium salts; thus with hydrochloric acid it forms ammonium chloride (sal ammoniac); with nitric acid, ammonium nitrate, etc. Perfectly dry ammonia gas will not combine with perfectly dry hydrogen chloride gas; moisture is necessary to bring about the reaction. As a demonstration experiment under air with ambient moisture, opened bottles of concentrated ammonia and hydrochloric acid solutions produce a cloud of ammonium chloride, which seems to appear "out of nothing" as the salt aerosol forms where the two diffusing clouds of reagents meet between the two bottles. The salts produced by the action of ammonia on acids are known as the ammonium salts and all contain the ammonium ion (). Although ammonia is well known as a weak base, it can also act as an extremely weak acid. It is a protic substance and is capable of formation of amides (which contain the ion). For example, lithium dissolves in liquid ammonia to give a blue solution (solvated electron) of lithium amide: Self-dissociation Like water, liquid ammonia undergoes molecular autoionisation to form its acid and base conjugates: Ammonia often functions as a weak base, so it has some buffering ability. Shifts in pH will cause more or fewer ammonium cations () and amide anions () to be present in solution. At standard pressure and temperature, K = = 10−30. Combustion Ammonia does not burn readily or sustain combustion, except under narrow fuel-to-air mixtures of 15–25% air. When mixed with oxygen, it burns with a pale yellowish-green flame. Ignition occurs when chlorine is passed into ammonia, forming nitrogen and hydrogen chloride; if chlorine is present in excess, then the highly explosive nitrogen trichloride () is also formed. The combustion of ammonia to form nitrogen and water is exothermic: , ΔH°r = −1267.20 kJ (or −316.8 kJ/mol if expressed per mol of ) The standard enthalpy change of combustion, ΔH°c, expressed per mole of ammonia and with condensation of the water formed, is −382.81 kJ/mol. Dinitrogen is the thermodynamic product of combustion: all nitrogen oxides are unstable with respect to and , which is the principle behind the catalytic converter. Nitrogen oxides can be formed as kinetic products in the presence of appropriate catalysts, a reaction of great industrial importance in the production of nitric acid: A subsequent reaction leads to : The combustion of ammonia in air is very difficult in the absence of a catalyst (such as platinum gauze or warm chromium(III) oxide), due to the relatively low heat of combustion, a lower laminar burning velocity, high auto-ignition temperature, high heat of vaporization, and a narrow flammability range. However, recent studies have shown that efficient and stable combustion of ammonia can be achieved using swirl combustors, thereby rekindling research interest in ammonia as a fuel for thermal power production. The flammable range of ammonia in dry air is 15.15–27.35% and in 100% relative humidity air is 15.95–26.55%. For studying the kinetics of ammonia combustion, knowledge of a detailed reliable reaction mechanism is required, but this has been challenging to obtain. Formation of other compounds Ammonia is a direct or indirect precursor to most manufactured nitrogen-containing compounds. In organic chemistry, ammonia can act as a nucleophile in substitution reactions. Amines can be formed by the reaction of ammonia with alkyl halides or with alcohols. The resulting − group is also nucleophilic so secondary and tertiary amines are often formed. When such multiple substitution is not desired, an excess of ammonia helps minimise it. For example, methylamine is prepared by the reaction of ammonia with chloromethane or with methanol. In both cases, dimethylamine and trimethylamine are co-produced. Ethanolamine is prepared by a ring-opening reaction with ethylene oxide, and when the reaction is allowed to go further it produces diethanolamine and triethanolamine. The reaction of ammonia with 2-bromopropanoic acid has been used to prepare racemic alanine in 70% yield. Amides can be prepared by the reaction of ammonia with carboxylic acid derivatives. For example, ammonia reacts with formic acid (HCOOH) to yield formamide () when heated. Acyl chlorides are the most reactive, but the ammonia must be present in at least a twofold excess to neutralise the hydrogen chloride formed. Esters and anhydrides also react with ammonia to form amides. Ammonium salts of carboxylic acids can be dehydrated to amides by heating to 150–200 °C as long as no thermally sensitive groups are present. The hydrogen in ammonia is susceptible to replacement by a myriad of substituents. When dry ammonia gas is heated with metallic sodium it converts to sodamide, . With chlorine, monochloramine is formed. Pentavalent ammonia is known as λ5-amine or, more commonly, ammonium hydride . This crystalline solid is only stable under high pressure and decomposes back into trivalent ammonia (λ3-amine) and hydrogen gas at normal conditions. This substance was once investigated as a possible solid rocket fuel in 1966. Ammonia as a ligand Ammonia can act as a ligand in transition metal complexes. It is a pure σ-donor, in the middle of the spectrochemical series, and shows intermediate hard–soft behaviour (see also ECW model). Its relative donor strength toward a series of acids, versus other Lewis bases, can be illustrated by C-B plots. For historical reasons, ammonia is named ammine in the nomenclature of coordination compounds. Some notable ammine complexes include tetraamminediaquacopper(II) (), a dark blue complex formed by adding ammonia to a solution of copper(II) salts. Tetraamminediaquacopper(II) hydroxide is known as Schweizer's reagent, and has the remarkable ability to dissolve cellulose. Diamminesilver(I) () is the active species in Tollens' reagent. Formation of this complex can also help to distinguish between precipitates of the different silver halides: silver chloride (AgCl) is soluble in dilute (2 M) ammonia solution, silver bromide (AgBr) is only soluble in concentrated ammonia solution, whereas silver iodide (AgI) is insoluble in aqueous ammonia. Ammine complexes of chromium(III) were known in the late 19th century, and formed the basis of Alfred Werner's revolutionary theory on the structure of coordination compounds. Werner noted only two isomers (fac- and mer-) of the complex could be formed, and concluded the ligands must be arranged around the metal ion at the vertices of an octahedron. This proposal has since been confirmed by X-ray crystallography. An ammine ligand bound to a metal ion is markedly more acidic than a free ammonia molecule, although deprotonation in aqueous solution is still rare. One example is the reaction of mercury(II) chloride with ammonia (Calomel reaction) where the resulting mercuric amidochloride is highly insoluble. Ammonia forms 1:1 adducts with a variety of Lewis acids such as , phenol, and . Ammonia is a hard base (HSAB theory) and its E & C parameters are EB = 2.31 and CB = 2.04. Its relative donor strength toward a series of acids, versus other Lewis bases, can be illustrated by C-B plots. Detection and determination Ammonia in solution Ammonia and ammonium salts can be readily detected, in very minute traces, by the addition of Nessler's solution, which gives a distinct yellow colouration in the presence of the slightest trace of ammonia or ammonium salts. The amount of ammonia in ammonium salts can be estimated quantitatively by distillation of the salts with sodium (NaOH) or potassium hydroxide (KOH), the ammonia evolved being absorbed in a known volume of standard sulfuric acid and the excess of acid then determined volumetrically; or the ammonia may be absorbed in hydrochloric acid and the ammonium chloride so formed precipitated as ammonium hexachloroplatinate, . Gaseous ammonia Sulfur sticks are burnt to detect small leaks in industrial ammonia refrigeration systems. Larger quantities can be detected by warming the salts with a caustic alkali or with quicklime, when the characteristic smell of ammonia will be at once apparent. Ammonia is an irritant and irritation increases with concentration; the permissible exposure limit is 25 ppm, and lethal above 500 ppm. Higher concentrations are hardly detected by conventional detectors, the type of detector is chosen according to the sensitivity required (e.g. semiconductor, catalytic, electrochemical). Holographic sensors have been proposed for detecting concentrations up to 12.5% in volume. Ammoniacal nitrogen (NH3-N) Ammoniacal nitrogen (NH3-N) is a measure commonly used for testing the quantity of ammonium ions, derived naturally from ammonia, and returned to ammonia via organic processes, in water or waste liquids. It is a measure used mainly for quantifying values in waste treatment and water purification systems, as well as a measure of the health of natural and man-made water reserves. It is measured in units of mg/L (milligram per litre). History The ancient Greek historian Herodotus mentioned that there were outcrops of salt in an area of Libya that was inhabited by a people called the "Ammonians" (now: the Siwa oasis in northwestern Egypt, where salt lakes still exist). The Greek geographer Strabo also mentioned the salt from this region. However, the ancient authors Dioscorides, Apicius, Arrian, Synesius, and Aëtius of Amida described this salt as forming clear crystals that could be used for cooking and that were essentially rock salt. Hammoniacus sal appears in the writings of Pliny, although it is not known whether the term is identical with the more modern sal ammoniac (ammonium chloride). The fermentation of urine by bacteria produces a solution of ammonia; hence fermented urine was used in Classical Antiquity to wash cloth and clothing, to remove hair from hides in preparation for tanning, to serve as a mordant in dying cloth, and to remove rust from iron. It was also used by ancient dentists to wash teeth. In the form of sal ammoniac (نشادر, nushadir), ammonia was important to the Muslim alchemists. It was mentioned in the Book of Stones, likely written in the 9th century and attributed to Jābir ibn Hayyān. It was also important to the European alchemists of the 13th century, being mentioned by Albertus Magnus. It was also used by dyers in the Middle Ages in the form of fermented urine to alter the colour of vegetable dyes. In the 15th century, Basilius Valentinus showed that ammonia could be obtained by the action of alkalis on sal ammoniac. At a later period, when sal ammoniac was obtained by distilling the hooves and horns of oxen and neutralizing the resulting carbonate with hydrochloric acid, the name "spirit of hartshorn" was applied to ammonia. Gaseous ammonia was first isolated by Joseph Black in 1756 by reacting sal ammoniac (ammonium chloride) with calcined magnesia (magnesium oxide). It was isolated again by Peter Woulfe in 1767, by Carl Wilhelm Scheele in 1770 and by Joseph Priestley in 1773 and was termed by him "alkaline air". Eleven years later in 1785, Claude Louis Berthollet ascertained its composition. The Haber–Bosch process to produce ammonia from the nitrogen in the air was developed by Fritz Haber and Carl Bosch in 1909 and patented in 1910. It was first used on an industrial scale in Germany during World War I, following the allied blockade that cut off the supply of nitrates from Chile. The ammonia was used to produce explosives to sustain war efforts. Before the availability of natural gas, hydrogen as a precursor to ammonia production was produced via the electrolysis of water or using the chloralkali process. With the advent of the steel industry in the 20th century, ammonia became a byproduct of the production of coking coal. Applications Solvent Liquid ammonia is the best-known and most widely studied nonaqueous ionising solvent. Its most conspicuous property is its ability to dissolve alkali metals to form highly coloured, electrically conductive solutions containing solvated electrons. Apart from these remarkable solutions, much of the chemistry in liquid ammonia can be classified by analogy with related reactions in aqueous solutions. Comparison of the physical properties of with those of water shows has the lower melting point, boiling point, density, viscosity, dielectric constant and electrical conductivity; this is due at least in part to the weaker hydrogen bonding in and because such bonding cannot form cross-linked networks, since each molecule has only one lone pair of electrons compared with two for each molecule. The ionic self-dissociation constant of liquid at −50 °C is about 10−33. Solubility of salts Liquid ammonia is an ionising solvent, although less so than water, and dissolves a range of ionic compounds, including many nitrates, nitrites, cyanides, thiocyanates, metal cyclopentadienyl complexes and metal bis(trimethylsilyl)amides. Most ammonium salts are soluble and act as acids in liquid ammonia solutions. The solubility of halide salts increases from fluoride to iodide. A saturated solution of ammonium nitrate (Divers' solution, named after Edward Divers) contains 0.83 mol solute per mole of ammonia and has a vapour pressure of less than 1 bar even at . Solutions of metals Liquid ammonia will dissolve all of the alkali metals and other electropositive metals such as Ca, Sr, Ba, Eu, and Yb (also Mg using an electrolytic process). At low concentrations (<0.06 mol/L), deep blue solutions are formed: these contain metal cations and solvated electrons, free electrons that are surrounded by a cage of ammonia molecules. These solutions are very useful as strong reducing agents. At higher concentrations, the solutions are metallic in appearance and in electrical conductivity. At low temperatures, the two types of solution can coexist as immiscible phases. Redox properties of liquid ammonia The range of thermodynamic stability of liquid ammonia solutions is very narrow, as the potential for oxidation to dinitrogen, E° (), is only +0.04 V. In practice, both oxidation to dinitrogen and reduction to dihydrogen are slow. This is particularly true of reducing solutions: the solutions of the alkali metals mentioned above are stable for several days, slowly decomposing to the metal amide and dihydrogen. Most studies involving liquid ammonia solutions are done in reducing conditions; although oxidation of liquid ammonia is usually slow, there is still a risk of explosion, particularly if transition metal ions are present as possible catalysts. Fertilizer In the US as of 2019, approximately 88% of ammonia was used as fertilizers either as its salts, solutions or anhydrously. When applied to soil, it helps provide increased yields of crops such as maize and wheat. 30% of agricultural nitrogen applied in the US is in the form of anhydrous ammonia and worldwide 110 million tonnes are applied each year. Precursor to nitrogenous compounds Ammonia is directly or indirectly the precursor to most nitrogen-containing compounds. Virtually all synthetic nitrogen compounds are derived from ammonia. An important derivative is nitric acid. This key material is generated via the Ostwald process by oxidation of ammonia with air over a platinum catalyst at , ≈9 atm. Nitric oxide is an intermediate in this conversion: Nitric acid is used for the production of fertilizers, explosives, and many organonitrogen compounds. Ammonia is also used to make the following compounds: Hydrazine, in the Olin Raschig process and the peroxide process Hydrogen cyanide, in the BMA process and the Andrussow process Hydroxylamine and ammonium carbonate, in the Raschig process Phenol, in the Raschig–Hooker process Urea, in the Bosch–Meiser urea process and in Wöhler synthesis Amino acids, using Strecker amino-acid synthesis Acrylonitrile, in the Sohio process Ammonia can also be used to make compounds in reactions which are not specifically named. Examples of such compounds include: ammonium perchlorate, ammonium nitrate, formamide, dinitrogen tetroxide, alprazolam, ethanolamine, ethyl carbamate, hexamethylenetetramine, and ammonium bicarbonate. Cleansing agent Household "ammonia" (more correctly called ammonium hydroxide) is a solution of in water, and is used as a general purpose cleaner for many surfaces. Because ammonia results in a relatively streak-free shine, one of its most common uses is to clean glass, porcelain, and stainless steel. It is also frequently used for cleaning ovens and for soaking items to loosen baked-on grime. Household ammonia ranges in concentration by weight from 5% to 10% ammonia. US manufacturers of cleaning products are required to provide the product's material safety data sheet which lists the concentration used. Solutions of ammonia (5–10% by weight) are used as household cleaners, particularly for glass. These solutions are irritating to the eyes and mucous membranes (respiratory and digestive tracts), and to a lesser extent the skin. Experts advise that caution be used to ensure the chemical is not mixed into any liquid containing bleach, due to the danger of forming toxic chlorine gas. Mixing with chlorine-containing products or strong oxidants, such as household bleach, can generate toxic chloramine fumes. Experts also warn not to use ammonia-based cleaners (such as glass or window cleaners) on car touchscreens, due to the risk of damage to the screen's anti-glare and anti-fingerprint coatings. Fermentation Solutions of ammonia ranging from 16% to 25% are used in the fermentation industry as a source of nitrogen for microorganisms and to adjust pH during fermentation. Antimicrobial agent for food products As early as in 1895, it was known that ammonia was "strongly antiseptic ... it requires 1.4 grams per litre to preserve beef tea (broth)." In one study, anhydrous ammonia destroyed 99.999% of zoonotic bacteria in 3 types of animal feed, but not silage. Anhydrous ammonia is currently used commercially to reduce or eliminate microbial contamination of beef. Lean finely textured beef (popularly known as "pink slime") in the beef industry is made from fatty beef trimmings (c. 50–70% fat) by removing the fat using heat and centrifugation, then treating it with ammonia to kill E. coli. The process was deemed effective and safe by the US Department of Agriculture based on a study that found that the treatment reduces E. coli to undetectable levels. There have been safety concerns about the process as well as consumer complaints about the taste and smell of ammonia-treated beef. Fuel The raw energy density of liquid ammonia is 11.5 MJ/L, which is about a third that of diesel. There is the opportunity to convert ammonia back to hydrogen, where it can be used to power hydrogen fuel cells, or it may be used directly within high-temperature solid oxide direct ammonia fuel cells to provide efficient power sources that do not emit greenhouse gases. The conversion of ammonia to hydrogen via the sodium amide process, either for combustion or as fuel for a proton exchange membrane fuel cell, is possible. Another method is the catalytic decomposition of ammonia using solid catalysts. Conversion to hydrogen would allow the storage of hydrogen at nearly 18 wt% compared to ≈5% for gaseous hydrogen under pressure. Ammonia engines or ammonia motors, using ammonia as a working fluid, have been proposed and occasionally used. The principle is similar to that used in a fireless locomotive, but with ammonia as the working fluid, instead of steam or compressed air. Ammonia engines were used experimentally in the 19th century by Goldsworthy Gurney in the UK and the St. Charles Avenue Streetcar line in New Orleans in the 1870s and 1880s, and during World War II ammonia was used to power buses in Belgium. Ammonia is sometimes proposed as a practical alternative to fossil fuel for internal combustion engines. Its high octane rating of 120 and low flame temperature allows the use of high compression ratios without a penalty of high production. Since ammonia contains no carbon, its combustion cannot produce carbon dioxide, carbon monoxide, hydrocarbons, or soot. Ammonia production currently creates 1.8% of global emissions. "Green ammonia" is ammonia produced by using green hydrogen (hydrogen produced by electrolysis), whereas "blue ammonia" is ammonia produced using blue hydrogen (hydrogen produced by steam methane reforming where the carbon dioxide has been captured and stored). However, ammonia cannot be easily used in existing Otto cycle engines because of its very narrow flammability range. The 60 MW Rjukan dam in Telemark, Norway, produced ammonia for many years from 1913, providing fertilizer for much of Europe. Despite this, several tests have been run. Compared to hydrogen as a fuel, ammonia is much more energy efficient, and could be produced, stored, and delivered at a much lower cost than hydrogen, which must be kept compressed or as a cryogenic liquid. Rocket engines have also been fueled by ammonia. The Reaction Motors XLR99 rocket engine that powered the hypersonic research aircraft used liquid ammonia. Although not as powerful as other fuels, it left no soot in the reusable rocket engine, and its density approximately matches the density of the oxidizer, liquid oxygen, which simplified the aircraft's design. In early August 2018, scientists from Australia's Commonwealth Scientific and Industrial Research Organisation (CSIRO) announced the success of developing a process to release hydrogen from ammonia and harvest that at ultra-high purity as a fuel for cars. This uses a special membrane. Two demonstration fuel cell vehicles have the technology, a Hyundai Nexo and Toyota Mirai. In 2020, Saudi Arabia shipped 40 metric tons of liquid "blue ammonia" to Japan for use as a fuel. It was produced as a by-product by petrochemical industries, and can be burned without giving off greenhouse gases. Its energy density by volume is nearly double that of liquid hydrogen. If the process of creating it can be scaled up via purely renewable resources, producing green ammonia, it could make a major difference in avoiding climate change. The company ACWA Power and the city of Neom have announced the construction of a green hydrogen and ammonia plant in 2020. Green ammonia is considered as a potential fuel for future container ships. In 2020, the companies DSME and MAN Energy Solutions announced the construction of an ammonia-based ship, DSME plans to commercialize it by 2025. The use of ammonia as a potential alternative fuel for aircraft jet engines is also being explored. Japan intends to implement a plan to develop ammonia co-firing technology that can increase the use of ammonia in power generation, as part of efforts to assist domestic and other Asian utilities to accelerate their transition to carbon neutrality. In October 2021, the first International Conference on Fuel Ammonia (ICFA2021) was held. In June 2022, IHI Corporation succeeded in reducing greenhouse gases by over 99% during combustion of liquid ammonia in a 2,000-kilowatt-class gas turbine achieving truly -free power generation. In July 2022, Quad nations of Japan, the U.S., Australia and India agreed to promote technological development for clean-burning hydrogen and ammonia as fuels at the security grouping's first energy meeting. , however, significant amounts of are produced. Nitrous oxide may also be a problem. Other Remediation of gaseous emissions Ammonia is used to scrub from the burning of fossil fuels, and the resulting product is converted to ammonium sulfate for use as fertilizer. Ammonia neutralises the nitrogen oxide () pollutants emitted by diesel engines. This technology, called SCR (selective catalytic reduction), relies on a vanadia-based catalyst. Ammonia may be used to mitigate gaseous spills of phosgene. As a hydrogen carrier Due to its attributes, being liquid at ambient temperature under its own vapour pressure and having high volumetric and gravimetric energy density, ammonia is considered a suitable carrier for hydrogen, and may be cheaper than direct transport of liquid hydrogen. Refrigeration – R717 Because of ammonia's vaporization properties, it is a useful refrigerant. It was commonly used before the popularisation of chlorofluorocarbons (Freons). Anhydrous ammonia is widely used in industrial refrigeration applications and hockey rinks because of its high energy efficiency and low cost. It suffers from the disadvantage of toxicity, and requiring corrosion resistant components, which restricts its domestic and small-scale use. Along with its use in modern vapor-compression refrigeration it is used in a mixture along with hydrogen and water in absorption refrigerators. The Kalina cycle, which is of growing importance to geothermal power plants, depends on the wide boiling range of the ammonia–water mixture. Ammonia coolant is also used in the S1 radiator aboard the International Space Station in two loops which are used to regulate the internal temperature and enable temperature-dependent experiments. The potential importance of ammonia as a refrigerant has increased with the discovery that vented CFCs and HFCs are extremely potent and stable greenhouse gases. Stimulant Ammonia, as the vapor released by smelling salts, has found significant use as a respiratory stimulant. Ammonia is commonly used in the illegal manufacture of methamphetamine through a Birch reduction. The Birch method of making methamphetamine is dangerous because the alkali metal and liquid ammonia are both extremely reactive, and the temperature of liquid ammonia makes it susceptible to explosive boiling when reactants are added. Textile Liquid ammonia is used for treatment of cotton materials, giving properties like mercerisation, using alkalis. In particular, it is used for prewashing of wool. Lifting gas At standard temperature and pressure, ammonia is less dense than atmosphere and has approximately 45–48% of the lifting power of hydrogen or helium. Ammonia has sometimes been used to fill balloons as a lifting gas. Because of its relatively high boiling point (compared to helium and hydrogen), ammonia could potentially be refrigerated and liquefied aboard an airship to reduce lift and add ballast (and returned to a gas to add lift and reduce ballast). Fuming Ammonia has been used to darken quartersawn white oak in Arts & Crafts and Mission-style furniture. Ammonia fumes react with the natural tannins in the wood and cause it to change colour. Safety The US Occupational Safety and Health Administration (OSHA) has set a 15-minute exposure limit for gaseous ammonia of 35 ppm by volume in the environmental air and an 8-hour exposure limit of 25 ppm by volume. The National Institute for Occupational Safety and Health (NIOSH) recently reduced the IDLH (Immediately Dangerous to Life and Health, the level to which a healthy worker can be exposed for 30 minutes without suffering irreversible health effects) from 500 to 300 based on recent more conservative interpretations of original research in 1943. Other organizations have varying exposure levels. US Navy Standards [U.S. Bureau of Ships 1962] maximum allowable concentrations (MACs): for continuous exposure (60 days) is 25 ppm; for exposure of 1 hour is 400 ppm. Ammonia vapor has a sharp, irritating, pungent odor that acts as a warning of potentially dangerous exposure. The average odor threshold is 5 ppm, well below any danger or damage. Exposure to very high concentrations of gaseous ammonia can result in lung damage and death. Ammonia is regulated in the US as a non-flammable gas, but it meets the definition of a material that is toxic by inhalation and requires a hazardous safety permit when transported in quantities greater than . Liquid ammonia is dangerous because it is hygroscopic and because it can cause caustic burns. See for more information. Toxicity The toxicity of ammonia solutions does not usually cause problems for humans and other mammals, as a specific mechanism exists to prevent its build-up in the bloodstream. Ammonia is converted to carbamoyl phosphate by the enzyme carbamoyl phosphate synthetase, and then enters the urea cycle to be either incorporated into amino acids or excreted in the urine. Fish and amphibians lack this mechanism, as they can usually eliminate ammonia from their bodies by direct excretion. Ammonia even at dilute concentrations is highly toxic to aquatic animals, and for this reason it is classified as dangerous for the environment. Atmospheric ammonia plays a key role in the formation of fine particulate matter. Ammonia is a constituent of tobacco smoke. Coking wastewater Ammonia is present in coking wastewater streams, as a liquid by-product of the production of coke from coal. In some cases, the ammonia is discharged to the marine environment where it acts as a pollutant. The Whyalla steelworks in South Australia is one example of a coke-producing facility which discharges ammonia into marine waters. Aquaculture Ammonia toxicity is believed to be a cause of otherwise unexplained losses in fish hatcheries. Excess ammonia may accumulate and cause alteration of metabolism or increases in the body pH of the exposed organism. Tolerance varies among fish species. At lower concentrations, around 0.05 mg/L, un-ionised ammonia is harmful to fish species and can result in poor growth and feed conversion rates, reduced fecundity and fertility and increase stress and susceptibility to bacterial infections and diseases. Exposed to excess ammonia, fish may suffer loss of equilibrium, hyper-excitability, increased respiratory activity and oxygen uptake and increased heart rate. At concentrations exceeding 2.0 mg/L, ammonia causes gill and tissue damage, extreme lethargy, convulsions, coma, and death. Experiments have shown that the lethal concentration for a variety of fish species ranges from 0.2 to 2.0 mg/L. During winter, when reduced feeds are administered to aquaculture stock, ammonia levels can be higher. Lower ambient temperatures reduce the rate of algal photosynthesis so less ammonia is removed by any algae present. Within an aquaculture environment, especially at large scale, there is no fast-acting remedy to elevated ammonia levels. Prevention rather than correction is recommended to reduce harm to farmed fish and in open water systems, the surrounding environment. Storage information Similar to propane, anhydrous ammonia boils below room temperature when at atmospheric pressure. A storage vessel capable of is suitable to contain the liquid. Ammonia is used in numerous different industrial application requiring carbon or stainless steel storage vessels. Ammonia with at least 0.2% by weight water content is not corrosive to carbon steel. carbon steel construction storage tanks with 0.2% by weight or more of water could last more than 50 years in service. Experts warn that ammonium compounds not be allowed to come in contact with bases (unless in an intended and contained reaction), as dangerous quantities of ammonia gas could be released. Laboratory The hazards of ammonia solutions depend on the concentration: "dilute" ammonia solutions are usually 5–10% by weight (<5.62 mol/L); "concentrated" solutions are usually prepared at >25% by weight. A 25% (by weight) solution has a density of 0.907 g/cm3, and a solution that has a lower density will be more concentrated. The European Union classification of ammonia solutions is given in the table. The ammonia vapour from concentrated ammonia solutions is severely irritating to the eyes and the respiratory tract, and experts warn that these solutions only be handled in a fume hood. Saturated ("0.880" – see #Properties) solutions can develop a significant pressure inside a closed bottle in warm weather, and experts also warn that the bottle be opened with care. This is not usually a problem for 25% ("0.900") solutions. Experts warn that ammonia solutions not be mixed with halogens, as toxic and/or explosive products are formed. Experts also warn that prolonged contact of ammonia solutions with silver, mercury or iodide salts can also lead to explosive products: such mixtures are often formed in qualitative inorganic analysis, and that it needs to be lightly acidified but not concentrated (<6% w/v) before disposal once the test is completed. Laboratory use of anhydrous ammonia (gas or liquid) Anhydrous ammonia is classified as toxic (T) and dangerous for the environment (N). The gas is flammable (autoignition temperature: 651 °C) and can form explosive mixtures with air (16–25%). The permissible exposure limit (PEL) in the United States is 50 ppm (35 mg/m3), while the IDLH concentration is estimated at 300 ppm. Repeated exposure to ammonia lowers the sensitivity to the smell of the gas: normally the odour is detectable at concentrations of less than 50 ppm, but desensitised individuals may not detect it even at concentrations of 100 ppm. Anhydrous ammonia corrodes copper- and zinc-containing alloys which makes brass fittings not appropriate for handling the gas. Liquid ammonia can also attack rubber and certain plastics. Ammonia reacts violently with the halogens. Nitrogen triiodide, a primary high explosive, is formed when ammonia comes in contact with iodine. Ammonia causes the explosive polymerisation of ethylene oxide. It also forms explosive fulminating compounds with compounds of gold, silver, mercury, germanium or tellurium, and with stibine. Violent reactions have also been reported with acetaldehyde, hypochlorite solutions, potassium ferricyanide and peroxides. Production Ammonia has one of the highest rates of production of any inorganic chemical. Production is sometimes expressed in terms of 'fixed nitrogen'. Global production was estimated as being 160 million tonnes in 2020 (147 tons of fixed nitrogen). China accounted for 26.5% of that, followed by Russia at 11.0%, the United States at 9.5%, and India at 8.3%. Before the start of World War I, most ammonia was obtained by the dry distillation of nitrogenous vegetable and animal waste products, including camel dung, where it was distilled by the reduction of nitrous acid and nitrites with hydrogen; in addition, it was produced by the distillation of coal, and also by the decomposition of ammonium salts by alkaline hydroxides such as quicklime: For small scale laboratory synthesis, one can heat urea and calcium hydroxide: Haber–Bosch Mass production uses the Haber–Bosch process, a gas phase reaction between hydrogen () and nitrogen () at a moderately-elevated temperature (450 °C) and high pressure (): , ΔH° = −91.8 kJ/mol This reaction is exothermic and results in decreased entropy, meaning that the reaction is favoured at lower temperatures and higher pressures. It is difficult and expensive to achieve, as lower temperatures result in slower reaction kinetics (hence a slower reaction rate) and high pressure requires high-strength pressure vessels that are not weakened by hydrogen embrittlement. Diatomic nitrogen is bound together by a triple bond, which makes it rather inert. Yield and efficiency are low, meaning that the output must be continuously separated and extracted for the reaction to proceed at an acceptable pace. Combined with the energy needed to produce hydrogen and purified atmospheric nitrogen, ammonia production is energy-intensive, accounting for 1% to 2% of global energy consumption, 3% of global carbon emissions, and 3 to 5% of natural gas consumption. The choice of catalyst is important for synthesizing ammonia. In 2012, Hideo Hosono's group found that Ru-loaded calcium-aluminum oxide C12A7: electride works well as a catalyst and pursued more efficient formation. This method is implemented in a small plant for ammonia synthesis in Japan. In 2019, Hosono's group found another catalyst, a novel perovskite oxynitride-hydride , that works at lower temperature and without costly ruthenium. Electrochemical Ammonia can be synthesized electrochemically. The only required inputs are sources of nitrogen (potentially atmospheric) and hydrogen (water), allowing generation at the point of use. The availability of renewable energy creates the possibility of zero emission production. Another electrochemical synthesis mode involves the reductive formation of lithium nitride, which can be protonated to ammonia, given a proton source. Ethanol has been used as such a source, although it may degrade. The first use of this chemistry was reported in 1930, where lithium solutions in ethanol were used to produce ammonia at pressures of up to 1000 bar. In 1994, Tsuneto et al. used lithium electrodeposition in tetrahydrofuran to synthesize ammonia at more moderate pressures with reasonable Faradaic efficiency. Other studies have since used the ethanol-tetrahydrofuran system for electrochemical ammonia synthesis. In 2019, Lazouski et al. proposed a mechanism to explain observed ammonia formation kinetics. In 2020, Lazouski et al. developed a solvent-agnostic gas diffusion electrode to improve nitrogen transport to the reactive lithium. The study observed production rates of up to 30 ± 5 nanomoles/s/cm2 and Faradaic efficiencies of up to 47.5 ± 4% at ambient temperature and 1 bar pressure. In 2021, Suryanto et al. replaced ethanol with a tetraalkyl phosphonium salt. This cation can stably undergo deprotonation–reprotonation cycles, while it enhances the medium's ionic conductivity. The study observed production rates of 53 ± 1 nanomoles/s/cm2 at 69 ± 1% faradaic efficiency experiments under 0.5-bar hydrogen and 19.5-bar nitrogen partial pressure at ambient temperature. Role in biological systems and human disease Ammonia is both a metabolic waste and a metabolic input throughout the biosphere. It is an important source of nitrogen for living systems. Although atmospheric nitrogen abounds (more than 75%), few living creatures are capable of using atmospheric nitrogen in its diatomic form, gas. Therefore, nitrogen fixation is required for the synthesis of amino acids, which are the building blocks of protein. Some plants rely on ammonia and other nitrogenous wastes incorporated into the soil by decaying matter. Others, such as nitrogen-fixing legumes, benefit from symbiotic relationships with rhizobia bacteria that create ammonia from atmospheric nitrogen. In humans, inhaling ammonia in high concentrations can be fatal. Exposure to ammonia can cause headaches, edema, impaired memory, seizures and coma as it is neurotoxic in nature. Biosynthesis In certain organisms, ammonia is produced from atmospheric nitrogen by enzymes called nitrogenases. The overall process is called nitrogen fixation. Intense effort has been directed toward understanding the mechanism of biological nitrogen fixation. The scientific interest in this problem is motivated by the unusual structure of the active site of the enzyme, which consists of an ensemble. Ammonia is also a metabolic product of amino acid deamination catalyzed by enzymes such as glutamate dehydrogenase 1. Ammonia excretion is common in aquatic animals. In humans, it is quickly converted to urea, which is much less toxic, particularly less basic. This urea is a major component of the dry weight of urine. Most reptiles, birds, insects, and snails excrete uric acid solely as nitrogenous waste. Physiology Ammonia plays a role in both normal and abnormal animal physiology. It is biosynthesised through normal amino acid metabolism and is toxic in high concentrations. The liver converts ammonia to urea through a series of reactions known as the urea cycle. Liver dysfunction, such as that seen in cirrhosis, may lead to elevated amounts of ammonia in the blood (hyperammonemia). Likewise, defects in the enzymes responsible for the urea cycle, such as ornithine transcarbamylase, lead to hyperammonemia. Hyperammonemia contributes to the confusion and coma of hepatic encephalopathy, as well as the neurologic disease common in people with urea cycle defects and organic acidurias. Ammonia is important for normal animal acid/base balance. After formation of ammonium from glutamine, α-ketoglutarate may be degraded to produce two bicarbonate ions, which are then available as buffers for dietary acids. Ammonium is excreted in the urine, resulting in net acid loss. Ammonia may itself diffuse across the renal tubules, combine with a hydrogen ion, and thus allow for further acid excretion. Excretion Ammonium ions are a toxic waste product of metabolism in animals. In fish and aquatic invertebrates, it is excreted directly into the water. In mammals, sharks, and amphibians, it is converted in the urea cycle to urea, which is less toxic and can be stored more efficiently. In birds, reptiles, and terrestrial snails, metabolic ammonium is converted into uric acid, which is solid and can therefore be excreted with minimal water loss. Beyond Earth Ammonia has been detected in the atmospheres of the giant planets Jupiter, Saturn, Uranus and Neptune, along with other gases such as methane, hydrogen, and helium. The interior of Saturn may include frozen ammonia crystals. It is found on Deimos and Phobos – the two moons of Mars. Interstellar space Ammonia was first detected in interstellar space in 1968, based on microwave emissions from the direction of the galactic core. This was the first polyatomic molecule to be so detected. The sensitivity of the molecule to a broad range of excitations and the ease with which it can be observed in a number of regions has made ammonia one of the most important molecules for studies of molecular clouds. The relative intensity of the ammonia lines can be used to measure the temperature of the emitting medium. The following isotopic species of ammonia have been detected: , , , , and . The detection of triply deuterated ammonia was considered a surprise as deuterium is relatively scarce. It is thought that the low-temperature conditions allow this molecule to survive and accumulate. Since its interstellar discovery, has proved to be an invaluable spectroscopic tool in the study of the interstellar medium. With a large number of transitions sensitive to a wide range of excitation conditions, has been widely astronomically detected – its detection has been reported in hundreds of journal articles. Listed below is a sample of journal articles that highlights the range of detectors that have been used to identify ammonia. The study of interstellar ammonia has been important to a number of areas of research in the last few decades. Some of these are delineated below and primarily involve using ammonia as an interstellar thermometer. Interstellar formation mechanisms The interstellar abundance for ammonia has been measured for a variety of environments. The []/[] ratio has been estimated to range from 10−7 in small dark clouds up to 10−5 in the dense core of the Orion molecular cloud complex. Although a total of 18 total production routes have been proposed, the principal formation mechanism for interstellar is the reaction: The rate constant, k, of this reaction depends on the temperature of the environment, with a value of 5.2×10−6 at 10 K. The rate constant was calculated from the formula . For the primary formation reaction, and . Assuming an abundance of 3×10−7 and an electron abundance of 10−7 typical of molecular clouds, the formation will proceed at a rate of in a molecular cloud of total density . All other proposed formation reactions have rate constants of between 2 and 13 orders of magnitude smaller, making their contribution to the abundance of ammonia relatively insignificant. As an example of the minor contribution other formation reactions play, the reaction: has a rate constant of 2.2. Assuming densities of 105 and []/[] ratio of 10−7, this reaction proceeds at a rate of 2.2, more than 3 orders of magnitude slower than the primary reaction above. Some of the other possible formation reactions are: Interstellar destruction mechanisms There are 113 total proposed reactions leading to the destruction of . Of these, 39 were tabulated in extensive tables of the chemistry among C, N, and O compounds. A review of interstellar ammonia cites the following reactions as the principal dissociation mechanisms: with rate constants of 4.39×10−9 and 2.2×10−9, respectively. The above equations (, ) run at a rate of 8.8×10−9 and 4.4×10−13, respectively. These calculations assumed the given rate constants and abundances of []/[] = 10−5, []/[] = 2×10−5, []/[] = 2×10−9, and total densities of n = 105, typical of cold, dense, molecular clouds. Clearly, between these two primary reactions, equation () is the dominant destruction reaction, with a rate ≈10,000 times faster than equation (). This is due to the relatively high abundance of . Single antenna detections Radio observations of from the Effelsberg 100-m Radio Telescope reveal that the ammonia line is separated into two components – a background ridge and an unresolved core. The background corresponds well with the locations previously detected CO. The 25 m Chilbolton telescope in England detected radio signatures of ammonia in H II regions, HNH2O masers, H-H objects, and other objects associated with star formation. A comparison of emission line widths indicates that turbulent or systematic velocities do not increase in the central cores of molecular clouds. Microwave radiation from ammonia was observed in several galactic objects including W3(OH), Orion A, W43, W51, and five sources in the galactic centre. The high detection rate indicates that this is a common molecule in the interstellar medium and that high-density regions are common in the galaxy. Interferometric studies VLA observations of in seven regions with high-velocity gaseous outflows revealed condensations of less than 0.1 pc in L1551, S140, and Cepheus A. Three individual condensations were detected in Cepheus A, one of them with a highly elongated shape. They may play an important role in creating the bipolar outflow in the region. Extragalactic ammonia was imaged using the VLA in IC 342. The hot gas has temperatures above 70 K, which was inferred from ammonia line ratios and appears to be closely associated with the innermost portions of the nuclear bar seen in CO. was also monitored by VLA toward a sample of four galactic ultracompact HII regions: G9.62+0.19, G10.47+0.03, G29.96-0.02, and G31.41+0.31. Based upon temperature and density diagnostics, it is concluded that in general such clumps are probably the sites of massive star formation in an early evolutionary phase prior to the development of an ultracompact HII region. Infrared detections Absorption at 2.97 micrometres due to solid ammonia was recorded from interstellar grains in the Becklin-Neugebauer Object and probably in NGC 2264-IR as well. This detection helped explain the physical shape of previously poorly understood and related ice absorption lines. A spectrum of the disk of Jupiter was obtained from the Kuiper Airborne Observatory, covering the 100 to 300 cm−1 spectral range. Analysis of the spectrum provides information on global mean properties of ammonia gas and an ammonia ice haze. A total of 149 dark cloud positions were surveyed for evidence of "dense cores" by using the (J,K) = (1,1) rotating inversion line of NH3. In general, the cores are not spherically shaped, with aspect ratios ranging from 1.1 to 4.4. It is also found that cores with stars have broader lines than cores without stars. Ammonia has been detected in the Draco Nebula and in one or possibly two molecular clouds, which are associated with the high-latitude galactic infrared cirrus. The finding is significant because they may represent the birthplaces for the Population I metallicity B-type stars in the galactic halo that could have been borne in the galactic disk. Observations of nearby dark clouds By balancing and stimulated emission with spontaneous emission, it is possible to construct a relation between excitation temperature and density. Moreover, since the transitional levels of ammonia can be approximated by a 2-level system at low temperatures, this calculation is fairly simple. This premise can be applied to dark clouds, regions suspected of having extremely low temperatures and possible sites for future star formation. Detections of ammonia in dark clouds show very narrow linesindicative not only of low temperatures, but also of a low level of inner-cloud turbulence. Line ratio calculations provide a measurement of cloud temperature that is independent of previous CO observations. The ammonia observations were consistent with CO measurements of rotation temperatures of ≈10 K. With this, densities can be determined, and have been calculated to range between 104 and 105 cm−3 in dark clouds. Mapping of gives typical clouds sizes of 0.1 pc and masses near 1 solar mass. These cold, dense cores are the sites of future star formation. UC HII regions Ultra-compact HII regions are among the best tracers of high-mass star formation. The dense material surrounding UCHII regions is likely primarily molecular. Since a complete study of massive star formation necessarily involves the cloud from which the star formed, ammonia is an invaluable tool in understanding this surrounding molecular material. Since this molecular material can be spatially resolved, it is possible to constrain the heating/ionising sources, temperatures, masses, and sizes of the regions. Doppler-shifted velocity components allow for the separation of distinct regions of molecular gas that can trace outflows and hot cores originating from forming stars. Extragalactic detection Ammonia has been detected in external galaxies, and by simultaneously measuring several lines, it is possible to directly measure the gas temperature in these galaxies. Line ratios imply that gas temperatures are warm (≈50 K), originating from dense clouds with sizes of tens of pc. This picture is consistent with the picture within our Milky Way galaxyhot dense molecular cores form around newly forming stars embedded in larger clouds of molecular material on the scale of several hundred pc (giant molecular clouds; GMCs). See also Notes References Works Cited Further reading External links International Chemical Safety Card 0414 (anhydrous ammonia), ilo.org. International Chemical Safety Card 0215 (aqueous solutions), ilo.org. Emergency Response to Ammonia Fertilizer Releases (Spills) for the Minnesota Department of Agriculture.ammoniaspills.org National Institute for Occupational Safety and Health – Ammonia Page, cdc.gov NIOSH Pocket Guide to Chemical Hazards – Ammonia, cdc.gov Ammonia, video Bases (chemistry) Foul-smelling chemicals Gaseous signaling molecules Household chemicals Industrial gases Inorganic solvents Nitrogen cycle Nitrogen hydrides Nitrogen(−III) compounds Refrigerants Toxicology

1366

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

Amethyst

Amethyst is a lilac variety of quartz. The name comes from the Koine Greek αμέθυστος amethystos from α- a-, "not" and μεθύσκω (Ancient Greek) / μεθώ (Modern Greek), "intoxicate", a reference to the belief that the stone protected its owner from drunkenness. Ancient Greeks wore amethyst and carved drinking vessels from it in the belief that it would prevent intoxication. Amethyst, a semiprecious stone, is often used in jewelry. Structure Amethyst is a purple variety of quartz (SiO2) and owes its violet color to irradiation, impurities of iron and in some cases other transition metals, and the presence of other trace elements, which result in complex crystal lattice substitutions. The hardness of the mineral is the same as quartz, thus making it suitable for use in jewelry. Hue and tone Amethyst occurs in primary hues from a light lavender or pale violet to a deep purple. Amethyst may exhibit one or both secondary hues, red and blue. High-quality amethyst can be found in Siberia, Sri Lanka, Brazil, Uruguay, and the Far East. The ideal grade, called "Deep Siberian", has a primary purple hue of around 75–80%, with 15–20% blue and (depending on the light source) red secondary hues. "Rose de France" is defined by its markedly light shade of the purple, reminiscent of a lavender/lilac shade. These pale colors were once considered undesirable, but have recently become popular due to intensive marketing. Green quartz is sometimes incorrectly called green amethyst; this is a misnomer and not an appropriate name for the material, as the proper terminology is prasiolite. Other names for green quartz are vermarine or lime citrine. Amethyst frequently shows color zoning, with the most intense color typically found at the crystal terminations. It is the most prized variety of quartz. One of a gem cutter’s tasks is to make a finished product with even color. Sometimes, only a thin layer of a natural, uncut amethyst is violet colored, or the color is very uneven. The uncut gem may have only a small portion that is suitable for faceting. The color of amethyst has been demonstrated to result from substitution by irradiation of trivalent iron (Fe3+) for silicon in the structure, in the presence of trace elements of large ionic radius, and to a certain extent, the amethyst color can naturally result from displacement of transition elements even if the iron concentration is low. Natural amethyst is dichroic in reddish violet and bluish violet, but when heated, turns yellow-orange, yellow-brown, or dark brownish and may resemble citrine, but loses its dichroism, unlike genuine citrine. When partially heated, amethyst can result in ametrine. Amethyst can fade in tone if overexposed to light sources, and can be artificially darkened with adequate irradiation. It does not fluoresce under either short-wave or long-wave UV light. Geographic distribution Amethyst is found in many locations around the world. Between 2000 and 2010, the greatest production was from Marabá and Pau d'Arco, Pará, and the Paraná Basin, Rio Grande do Sul, Brazil; Sandoval, Santa Cruz, Bolivia; Artigas, Uruguay; Kalomo, Zambia; and Thunder Bay, Ontario. Lesser amounts are found in many other locations in Africa, Brazil, Spain, Argentina, Russia, Afghanistan, South Korea, Mexico, and the United States. Amethyst is produced in abundance in the state of Rio Grande do Sul in Brazil where it occurs in large geodes within volcanic rocks. Many of the hollow agates of southwestern Brazil and Uruguay contain a crop of amethyst crystals in the interior. Artigas, Uruguay and neighboring Brazilian state Rio Grande do Sul are large world producers, with lesser quantities mined in Minas Gerais and Bahia states. Amethyst is also found and mined in South Korea. The large opencast amethyst vein at Maissau, Lower Austria, was historically important, but is no longer included among significant producers. Much fine amethyst comes from Russia, especially near Mursinka in the Ekaterinburg district, where it occurs in drusy cavities in granitic rocks. Amethyst was historically mined in many localities in south India, though these are no longer significant producers. One of the largest global amethyst producers is Zambia in southern Africa, with an annual production around 1000 tons. Amethyst occurs at many localities in the United States. The most important production is at Four Peaks, Gila and Maricopa Counties, Arizona, and Jackson's Crossroads, Wilkes County, Georgia. Smaller occurrences have been reported in the Red Feather Lakes, near Fort Collins, Colorado; Amethyst Mountain, Texas; Yellowstone National Park; Delaware County, Pennsylvania; Haywood County, North Carolina; Deer Hill and Stow, Maine, and in the Lake Superior region of Minnesota, Wisconsin, and Michigan. Amethyst is relatively common in the Canadian provinces of Ontario and Nova Scotia. The largest amethyst mine in North America is located in Thunder Bay, Ontario. Amethyst is the official state gemstone of South Carolina. Several South Carolina amethysts are on display at the Smithsonian Museum of Natural History. History Amethyst was used as a gemstone by the ancient Egyptians and was largely employed in antiquity for intaglio engraved gems. The Greeks believed amethyst gems could prevent intoxication, while medieval European soldiers wore amethyst amulets as protection in battle in the belief that amethysts heal people and keep them cool-headed. Beads of amethyst were found in Anglo-Saxon graves in England. Anglican bishops wear an episcopal ring often set with an amethyst, an allusion to the description of the Apostles as "not drunk" at Pentecost in Acts 2:15. A large geode, or "amethyst-grotto", from near Santa Cruz in southern Brazil was presented at a 1902 exhibition in Düsseldorf, Germany. The meaning of amethyst varies from time to time and culture, which is why amethyst has different meanings in Feng Shui and focuses on increasing wealth. In ancient China, it was also used as a powerful tool to remove negative energies and drive away the hazards of daily life. Synthetic amethyst Synthetic (laboratory-grown) amethyst is produced by a synthesis method called hydrothermal growth, which grows the crystals inside a high-pressure autoclave. Synthetic amethyst is made to imitate the best quality amethyst. Its chemical and physical properties are the same as those of natural amethyst, and it cannot be differentiated with absolute certainty without advanced gemmological testing (which is often cost-prohibitive). One test based on "Brazil law twinning" (a form of quartz twinning where right- and left-hand quartz structures are combined in a single crystal) can be used to identify most synthetic amethyst rather easily. Synthesizing twinned amethyst is possible, but this type is not available in large quantities in the market. Treated amethyst is produced by gamma ray, X-ray, or electron-beam irradiation of clear quartz (rock crystal), which has been first doped with ferric impurities. Exposure to heat partially cancels the irradiation effects and amethyst generally becomes yellow or even green. Much of the citrine, cairngorm, or yellow quartz of jewelry is said to be merely "burnt amethyst". Cultural history Ancient Greece The Greek word amethystos may be translated as "not drunken", from Greek a-, "not" + , "intoxicated". Amethyst was considered to be a strong antidote against drunkenness, which is why wine goblets were often carved from it. In his poem "L'Amethyste, ou les Amours de Bacchus et d'Amethyste" (Amethyst or the loves of Bacchus and Amethyste), the French poet Remy Belleau (1528–1577) invented a myth in which Bacchus, the god of intoxication, of wine, and grapes was pursuing a maiden named Amethyste, who refused his affections. Amethyste prayed to the gods to remain chaste, a prayer which the chaste goddess Diana answered, transforming her into a white stone. Humbled by Amethyste's desire to remain chaste, Bacchus poured wine over the stone as an offering, dyeing the crystals purple. Variations of the story include that Dionysus had been insulted by a mortal and swore to slay the next mortal who crossed his path, creating fierce tigers to carry out his wrath. The mortal turned out to be a beautiful young woman, Amethystos, who was on her way to pay tribute to Artemis. Her life was spared by Artemis, who transformed the maiden into a statue of pure crystalline quartz to protect her from the brutal claws. Dionysus wept tears of wine in remorse for his action at the sight of the beautiful statue. The god's tears then stained the quartz purple. This myth and its variations are not found in classical sources. However, the goddess Rhea does present Dionysus with an amethyst stone to preserve the wine-drinker's sanity in historical text. Other cultural associations Tibetans consider amethyst sacred to the Buddha and make prayer beads from it. Amethyst is considered the birthstone of February. In the Middle Ages, it was considered a symbol of royalty and used to decorate English regalia. In the Old World, amethyst was considered one of the cardinal gems, in that it was one of the five gemstones considered precious above all others, until large deposits were found in Brazil. Value Until the 18th century, amethyst was included in the cardinal, or most valuable, gemstones (along with diamond, sapphire, ruby, and emerald), but since the discovery of extensive deposits in locations such as Brazil, it has lost most of its value. It is now considered a semiprecious stone. Collectors look for depth of color, possibly with red flashes if cut conventionally. As amethyst is readily available in large structures, the value of the gem is not primarily defined by carat weight. This is different from most gemstones, since the carat weight typically exponentially increases the value of the stone. The biggest factor in the value of amethyst is the color displayed. The highest-grade amethyst (called "Deep Russian") is exceptionally rare. When one is found, its value is dependent on the demand of collectors. The highest-grade sapphires or rubies are still orders of magnitude more expensive than amethyst. Handling and care The most suitable setting for gem amethyst is a prong or a bezel setting. The channel method must be used with caution. Amethyst has a good hardness, and handling it with proper care will prevent any damage to the stone. Amethyst is sensitive to strong heat and may lose or change its colour when exposed to prolonged heat or light. Polishing the stone or cleaning it by ultrasonic or steamer must be done with caution. See also Ametrine List of minerals Specimen Ridge References Kostov, R. I. 1992. Amethyst. A Geological-Mineralogical and Gemmological Essay. Union of Scientists in Bulgaria, Sofia, 249 p. (in Bulgarian with English abstract) Lieber, W. 1994. Amethyst. Geschichte, Eigenschaften, Fundorte. Christian Weise Verlag, München, 188 S. External links Quartz gemstones Provincial symbols of Ontario Trigonal minerals Minerals in space group 152 or 154

1367

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

Albertosaurus

Albertosaurus (; meaning "Alberta lizard") is a genus of tyrannosaurid theropod dinosaurs that lived in western North America during the Late Cretaceous Period, about 71 million years ago. The type species, A. sarcophagus, was apparently restricted in range to the modern-day Canadian province of Alberta, after which the genus is named, although an indeterminate species ("cf. Albertosaurus sp.") has been discovered in the Corral de Enmedio and Packard Formations in Mexico. Scientists disagree on the content of the genus, with some recognizing Gorgosaurus libratus as a second species. As a tyrannosaurid, Albertosaurus was a bipedal predator with tiny, two-fingered hands and a massive head that had dozens of large, sharp teeth. It may have been an apex predator in its local ecosystem. While Albertosaurus was large for a theropod, it was much smaller than its larger and more famous relative Tyrannosaurus rex, growing up to in length and weighing . Since the first discovery in 1884, fossils of more than 30 individuals have been recovered, providing scientists with a more detailed knowledge of Albertosaurus anatomy than is available for most other tyrannosaurids. The discovery of 26 individuals at one site provides evidence of pack behaviour and allows studies of ontogeny and population biology, which are impossible with lesser-known dinosaurs due to their remains being rarer and more fragmentary compared to those of Albertosaurus. History of discovery Naming Albertosaurus was named by Henry Fairfield Osborn in a one-page note at the end of his 1905 description of Tyrannosaurus rex. Its namesake is Alberta, the Canadian province established the same year, in which the first remains were found. The generic name also incorporates the Greek term /sauros ("lizard"), the most common suffix in dinosaur names. The type species is Albertosaurus sarcophagus; the specific name is derived from Ancient Greek σαρκοφάγος () meaning "flesh-eating" and having the same etymology as the funeral container with which it shares its name: a combination of the Greek words σαρξ/ ("flesh") and / ("to eat"). More than 30 specimens of all ages are known to science. Early discoveries The type specimen is a partial skull collected on June 9, 1884 from an outcrop of the Horseshoe Canyon Formation alongside the Red Deer River in Alberta. It was recovered by an expedition of the Geological Survey of Canada, led by the famous geologist Joseph Burr Tyrrell. Due to a lack of specialised equipment the almost complete skull could only be partially secured. In 1889, Tyrrell's colleague Thomas Chesmer Weston found an incomplete smaller skull associated with some skeletal material at a location nearby. The two skulls were assigned to the preexisting species Laelaps incrassatus by Edward Drinker Cope in 1892; although the name Laelaps was preoccupied by a genus of mite and had been changed to Dryptosaurus in 1877 by Othniel Charles Marsh, Cope refused to recognize the new name created by his archrival. However, Lawrence Lambe used the name Dryptosaurus incrassatus instead of Laelaps incrassatus when he described the remains in detail in 1903 and 1904, a combination first coined by Oliver Perry Hay in 1902. Shortly later, Osborn pointed out that D. incrassatus was based on generic tyrannosaurid teeth, so the two Horseshoe Canyon skulls could not be confidently referred to that species. The Horseshoe Canyon skulls also differed markedly from the remains of D. aquilunguis, type species of Dryptosaurus, so Osborn created the new name Albertosaurus sarcophagus for them in 1905. He did not describe the remains in any great detail, citing Lambe's complete description the year before. Both specimens (the holotype CMN 5600 and the paratype CMN 5601) are stored in the Canadian Museum of Nature in Ottawa. By the early twenty-first century, some concerns had arisen that, due to the damaged state of the holotype, Albertosaurus might be a nomen dubium that could only be used for the type specimen itself because other fossils could not reliably be assigned to it. However, in 2010, Thomas Carr established that the holotype, the paratype and comparable later finds all shared a single common unique trait or autapomorphy: the possession of an enlarged pneumatic opening in the back rim of the side of the palatine bone, proving that Albertosaurus was a valid taxon. Dry Island bone bed On 11 August 1910, American paleontologist Barnum Brown discovered the remains of a large group of Albertosaurus at another quarry alongside the Red Deer River. Because of the large number of bones and the limited time available, Brown's party did not collect every specimen, but made sure to collect remains from all of the individuals that they could identify in the bone bed. Among the bones deposited in the American Museum of Natural History collections in New York City are seven sets of right metatarsals, along with two isolated toe bones that did not match any of the metatarsals in size. This indicated the presence of at least nine individuals in the quarry. Palaeontologist Philip J. Currie of the Royal Tyrrell Museum of Palaeontology rediscovered the bonebed in 1997 and resumed fieldwork at the site, which is now located inside Dry Island Buffalo Jump Provincial Park. Further excavation from 1997 to 2005 turned up the remains of 13 more individuals of various ages, including a diminutive two-year-old and a very old individual estimated at over in length. None of these individuals are known from complete skeletons, and most are represented by remains in both museums. Excavations continued until 2008, when the minimum number of individuals present had been established at 12, on the basis of preserved elements that occur only once in a skeleton, and at 26 if mirrored elements were counted when differing in size due to ontogeny. A total of 1,128 Albertosaurus bones had been secured, the largest concentration of large theropod fossils known from the Cretaceous. Other discoveries In 1911, Barnum Brown, during the second year of American Museum of Natural History operations in Alberta, uncovered a fragmentary partial Albertosaurus skull at the Red Deer River near Tolman Bridge, specimen AMNH 5222. William Parks described a new species in 1928, Albertosaurus arctunguis, based on a partial skeleton lacking a skull excavated by Gus Lindblad and Ralph Hornell near the Red Deer River in 1923, but this species has been considered identical to A. sarcophagus since 1970. Parks' specimen (ROM 807) is housed in the Royal Ontario Museum in Toronto. No Albertosaurus fossils were found from 1926–1972, but, there has been an increase in findings since then. Apart from the Dry Island bonebed, six more skulls and skeletons have since been discovered in Alberta and are housed in various Canadian museums: specimens RTMP 81.010.001, found in 1978 by amateur paleontologist Maurice Stefanuk; RTMP 85.098.001, found by Stefanuk on 16 June 1985; RTMP 86.64.001 (December 1985); RTMP 86.205.001 (1986); RTMP 97.058.0001 (1996); and CMN 11315. None of the skeletons were found with complete skulls. Fossils have also been reported from the American states of Montana, New Mexico, Wyoming, and Missouri, but they are doubted to be from A. sarcophagus and may not even belong to the genus Albertosaurus. Two specimens from "cf Albertosaurus ".sp" have been found in Mexico (Packard Formation and Corral de Enmedio Formation). Gorgosaurus libratus In 1913, paleontologist Charles H. Sternberg recovered another tyrannosaurid skeleton from the slightly older Dinosaur Park Formation in Alberta. Lawrence Lambe named this dinosaur Gorgosaurus libratus in 1914. Other specimens were later found in Alberta and the US state of Montana. Finding—largely due to a lack of good Albertosaurus skull material—no significant differences to separate the two taxa, Dale Russell declared the name Gorgosaurus a junior synonym of Albertosaurus, which had been named first, and G. libratus was renamed Albertosaurus libratus in 1970. A species distinction was maintained because of the age difference. The addition extended the temporal range of the genus Albertosaurus earlier by several million years and its geographic range southwards by hundreds of kilometres. In 2003, Philip J. Currie, benefiting from much more extensive finds and a general increase in anatomical knowledge of theropods, compared several tyrannosaurid skulls and came to the conclusion that the two species are more distinct than previously thought. As the two species are sister taxa, they are more closely related to each other than to any other species. Recognizing this, Currie nevertheless recommended that Albertosaurus and Gorgosaurus be kept as separate genera, as he concluded that they were no more similar than Daspletosaurus and Tyrannosaurus, which are almost always separated. In addition, several albertosaurine specimens have been recovered from Alaska and New Mexico, and Currie suggested that the Albertosaurus-Gorgosaurus situation may be clarified once these are described fully. Most authors have followed Currie's recommendation, but some have not. Other species In 1930, Anatoly Nikolaevich Riabinin named Albertosaurus pericolosus based on a tooth from China, that probably belonged to Tarbosaurus. In 1932, Friedrich von Huene renamed Dryptosaurus incrassatus, not considered a nomen dubium by him, to Albertosaurus incrassatus. Because he had identified Gorgosaurus with Albertosaurus, in 1970, Russell also renamed Gorgosaurus sternbergi (Matthew & Brown 1922) into Albertosaurus sternbergi and Gorgosaurus lancensis (Gilmore 1946) into Albertosaurus lancensis. The former species is today seen as a juvenile form of Gorgosaurus libratus, the latter as either identical to Tyrannosaurus or representing a separate genus Nanotyrannus. In 1988, Gregory S. Paul based Albertosaurus megagracilis on a small tyrannosaurid skeleton, specimen LACM 28345, from the Hell Creek Formation of Montana. It was renamed Dinotyrannus in 1995, but is now thought to represent a juvenile Tyrannosaurus rex. Also in 1988, Paul renamed Alectrosaurus olseni (Gilmore 1933) into Albertosaurus olseni; this has found no general acceptance. In 1989, Gorgosaurus novojilovi (Maleev 1955) was renamed by Bryn Mader and Robert Bradley as Albertosaurus novojilovi. On two occasions, species based on valid Albertosaurus material were reassigned to a different genus: in 1922 William Diller Matthew renamed A. sarcophagus into Deinodon sarcophagus and in 1939 German paleontologist Oskar Kuhn renamed A. arctunguis into Deinodon arctunguis. Description Albertosaurus was a large bipedal predator but smaller than Tarbosaurus and Tyrannosaurus rex. Typical Albertosaurus adults measured up to long, and weighed between in body mass. Albertosaurus shared a similar body appearance with all other tyrannosaurids. Typically for a theropod, Albertosaurus was bipedal and balanced the heavy head and torso with a long tail. However, tyrannosaurid forelimbs were extremely small for their body size and retained only two digits. The hind limbs were long and ended in a four-toed foot on which the first digit, called the hallux, was short and did not reach the ground. The third digit was longer than the rest. Albertosaurus may have been able to reach walking speeds of 14–21 km/hour (8–13 mi/hour). At least for the younger individuals, a high running speed is plausible. Two skin impressions from Albertosaurus are known, both showing scales. One patch is found associated with some gastralic ribs and the impression of a long, unknown bone, indicating that the patch is from the belly. The scales are pebbly and gradually become larger and somewhat hexagonal in shape. Also preserved are two larger feature scales, placed 4.5 cm apart from each other, making Albertosaurus, along with Carnotaurus, the only known theropods with preserved feature scales. Another skin impression is from an unknown part of the body. These scales are small, diamond-shaped and arranged in rows. Skull and teeth The massive skull of Albertosaurus, which was perched on a short, S-shaped neck, was about long in the largest adults. Wide openings in the skull (fenestrae) reduced the weight of the head while also providing space for muscle attachment and sensory organs. Its long jaws contained, both sides combined, 58 or more banana-shaped teeth; larger tyrannosaurids possessed fewer teeth; Gorgosaurus had 62. Unlike most theropods, Albertosaurus and other tyrannosaurids were heterodont, with teeth of different forms depending on their position in the mouth. The premaxillary teeth at the tip of the upper jaw, four per side, were much smaller than the rest, more closely packed, and D-shaped in cross section. Like with Tyrannosaurus, the maxillary (cheek) teeth of Albertosaurus were adapted in general form to resist lateral forces exerted by a struggling prey. The bite force of Albertosaurus was less formidable, however, with the maximum force, by the hind teeth, reaching 3,413 Newtons. Above the eyes were short bony crests that may have been brightly coloured in life and used in courtship to attract a mate. William Abler observed in 2001 that Albertosaurus tooth serrations resemble a crack in the tooth ending in a round void called an ampulla. Tyrannosaurid teeth were used as holdfasts for pulling flesh off a body, so when a tyrannosaur pulled back on a piece of meat, the tension could cause a purely crack-like serration to spread through the tooth. However, the presence of the ampulla distributed these forces over a larger surface area, and lessened the risk of damage to the tooth under strain. The presence of incisions ending in voids has parallels in human engineering. Guitar makers use incisions ending in voids to, as Abler describes, "impart alternating regions of flexibility and rigidity" to wood they work. The use of a drill to create an "ampulla" of sorts and prevent the propagation of cracks through material is also used to protect aircraft surfaces. Abler demonstrated that a plexiglass bar with incisions called "kerfs" and drilled holes was more than 25% stronger than one with only regularly placed incisions. Unlike tyrannosaurs, ancient predators like phytosaurs and Dimetrodon had no adaptations to prevent the crack-like serrations of their teeth from spreading when subjected to the forces of feeding. Classification and systematics Albertosaurus is a member of the theropod family Tyrannosauridae, in the subfamily Albertosaurinae. Its closest relative is the slightly older Gorgosaurus libratus (sometimes called Albertosaurus libratus; see below). These two species are the only described albertosaurines; other undescribed species may exist. Thomas Holtz found Appalachiosaurus to be an albertosaurine in 2004, but his more recent unpublished work locates it just outside Tyrannosauridae, in agreement with other authors. The other major subfamily of tyrannosaurids is the Tyrannosaurinae, which includes Daspletosaurus, Tarbosaurus and Tyrannosaurus. Compared with these robust tyrannosaurines, albertosaurines had slender builds, with proportionately smaller skulls and longer bones of the lower leg (tibia) and feet (metatarsals and phalanges). Below is the cladogram of the Tyrannosauridae based on the phylogenetic analysis conducted by Loewen et al. in 2013. Palaeobiology Growth pattern Most age categories of Albertosaurus are represented in the fossil record. Using bone histology, the age of an individual animal at the time of death can often be determined, allowing growth rates to be estimated and compared with other species. The youngest known Albertosaurus is a two-year-old discovered in the Dry Island bonebed, which would have weighed about 50 kilograms (110 lb) and measured slightly more than in length. The specimen from the same quarry is the oldest and largest known, at 28 years of age. When specimens of intermediate age and size are plotted on a graph, an S-shaped growth curve results, with the most rapid growth occurring in a four-year period ending around the sixteenth year of life, a pattern also seen in other tyrannosaurids. The growth rate during this phase was per year, based on an adult 1.3 tonnes. Other studies have suggested higher adult weights; this would affect the magnitude of the growth rate, but not the overall pattern. Tyrannosaurids similar in size to Albertosaurus had similar growth rates, although the much larger Tyrannosaurus rex grew at almost five times this rate ( per year) at its peak. The end of the rapid growth phase suggests the onset of sexual maturity in Albertosaurus, although growth continued at a slower rate throughout the animals' lives. Sexual maturation while still actively growing appears to be a shared trait among small and large dinosaurs as well as in large mammals such as humans and elephants. This pattern of relatively early sexual maturation differs strikingly from the pattern in birds, which delay their sexual maturity until after they have finished growing. During growth, through thickening the tooth morphology changed so much that, had the association of young and adult skeletons on the Dry Island bonebed not proven they belonged to the same taxon, the teeth of juveniles would likely have been identified by statistical analysis as those of a different species. Life history Most known Albertosaurus individuals were aged 14 years or more at the time of death. Juvenile animals are rarely found as fossils for several reasons, mainly preservation bias, where the smaller bones of younger animals were less likely to be preserved by fossilization than the larger bones of adults, and collection bias, where smaller fossils are less likely to be noticed by collectors in the field. Young Albertosaurus are relatively large for juvenile animals, but their remains are still rare in the fossil record compared with adults. It has been suggested that this phenomenon is a consequence of life history, rather than bias, and that fossils of juvenile Albertosaurus are rare because they simply did not die as often as adults did. A hypothesis of Albertosaurus life history postulates that hatchlings died in large numbers, but have not been preserved in the fossil record due to their small size and fragile construction. After just two years, juveniles were larger than any other predator in the region aside from adult Albertosaurus, and more fleet of foot than most of their prey animals. This resulted in a dramatic decrease in their mortality rate and a corresponding rarity of fossil remains. Mortality rates doubled at age twelve, perhaps the result of the physiological demands of the rapid growth phase, and then doubled again with the onset of sexual maturity between the ages of fourteen and sixteen. This elevated mortality rate continued throughout adulthood, perhaps due to the high physiological demands of procreation, including stress and injuries received during intraspecific competition for mates and resources, and eventually, the ever-increasing effects of senescence. The higher mortality rate in adults may explain their more common preservation. Very large animals were rare because few individuals survived long enough to attain such sizes. High infant mortality rates, followed by reduced mortality among juveniles and a sudden increase in mortality after sexual maturity, with very few animals reaching maximum size, is a pattern observed in many modern large mammals, including elephants, African buffalo, and rhinoceros. The same pattern is also seen in other tyrannosaurids. The comparison with modern animals and other tyrannosaurids lends support to this life history hypothesis, but bias in the fossil record may still play a large role, especially since more than two-thirds of all Albertosaurus specimens are known from one locality. Pack behaviour The Dry Island bonebed discovered by Barnum Brown and his crew contains the remains of 26 Albertosaurus, the most individuals found in one locality of any large Cretaceous theropod, and the second-most of any large theropod dinosaur behind the Allosaurus assemblage at the Cleveland-Lloyd Dinosaur Quarry in Utah. The group seems to be composed of one very old adult; eight adults between 17 and 23 years old; seven sub-adults undergoing their rapid growth phases at between 12 and 16 years old; and six juveniles between the ages of 2 and 11 years, who had not yet reached the growth phase. The near-absence of herbivore remains and the similar state of preservation common to the many individuals at the Albertosaurus bonebed quarry led Currie to conclude that the locality was not a predator trap like the La Brea Tar Pits in California, and that all of the preserved animals died at the same time. Currie claims this as evidence of pack behaviour. Other scientists are skeptical, observing that the animals may have been driven together by drought, flood or for other reasons. There is plentiful evidence for gregarious behaviour among herbivorous dinosaurs, including ceratopsians and hadrosaurs. However, only rarely are so many dinosaurian predators found at the same site. Small theropods like Deinonychus and Coelophysis have been found in aggregations, as have larger predators like Allosaurus and Mapusaurus. There is some evidence of gregarious behaviour in other tyrannosaurids as well. Fragmentary remains of smaller individuals were found alongside "Sue", the Tyrannosaurus mounted in the Field Museum of Natural History in Chicago, and a bonebed in the Two Medicine Formation of Montana contains at least three specimens of Daspletosaurus, preserved alongside several hadrosaurs. These findings may corroborate the evidence for social behaviour in Albertosaurus, although some or all of the above localities may represent temporary or unnatural aggregations. Others have speculated that instead of social groups, at least some of these finds represent Komodo dragon-like mobbing of carcasses, where aggressive competition leads to some of the predators being killed and cannibalized. Currie has also speculated on the pack-hunting habits of Albertosaurus. The leg proportions of the smaller individuals were comparable to those of ornithomimids, which were probably among the fastest dinosaurs. Younger Albertosaurus were probably equally fleet-footed, or at least faster than their prey. Currie hypothesized that the younger members of the pack may have been responsible for driving their prey towards the adults, who were larger and more powerful, but also slower. Juveniles may also have had different lifestyles than adults, filling predator niches between the enormous adults and the smaller contemporaneous theropods, the largest of which were two orders of magnitude smaller than adult Albertosaurus in mass. A similar situation is observed in modern Komodo dragons, with hatchlings beginning life as small insectivores before growing to become the dominant predators on their islands. However, as the preservation of behaviour in the fossil record is exceedingly rare, these ideas cannot readily be tested. In 2010, Currie, though still favouring the hunting pack hypothesis, admitted that the concentration could have been brought about by other causes, such as a slowly rising water level during an extended flood. Palaeopathology In 2009, researchers hypothesized that smooth-edged holes found in the fossil jaws of tyrannosaurid dinosaurs such as Albertosaurus were caused by a parasite similar to Trichomonas gallinae, which infects birds. They suggested that tyrannosaurids transmitted the infection by biting each other, and that the infection impaired their ability to eat food. In 2001, Bruce Rothschild and others published a study examining evidence for stress fractures and tendon avulsions in theropod dinosaurs and the implications for their behavior. They found that only one of the 319 Albertosaurus foot bones checked for stress fractures actually had them and none of the four hand bones did. The scientists found that stress fractures were "significantly" less common in Albertosaurus than in the carnosaur Allosaurus. ROM 807, the holotype of A. arctunguis (now referred to A. sarcophagus), had a deep hole in the iliac blade, although the describer of the species did not recognize this as pathological. The specimen also contains some exostosis on the fourth left metatarsal. In 1970, two of the five Albertosaurus sarcophagus specimens with humeri were reported by Dale Russel as having pathological damage to them. In 2010, the health of the Dry Island Albertosaurus assembly was reported upon. Most specimens showed no sign of disease. On three phalanges of the foot strange bony spurs, consisting of abnormal ossifications of the tendons, so-called enthesophytes, were present, their cause unknown. Two ribs and a belly-rib showed signs of breaking and healing. One adult specimen had a left lower jaw showing a puncture wound and both healed and unhealed bite marks. The low number of abnormalities compares favourably with the health condition of a Majungasaurus population of which it in 2007 was established that 19% of individuals showed bone pathologies. Palaeoecology Most fossils of Albertosaurus sarcophagus are known from the upper Horseshoe Canyon Formation in Alberta. These younger units of this geologic formation date to the early Maastrichtian stage of the Late Cretaceous Period, 70 to 68 Ma (million years ago). Immediately below this formation is the Bearpaw Shale, a marine formation representing a section of the Western Interior Seaway. The seaway was receding as the climate cooled and sea levels subsided towards the end of the Cretaceous, exposing land that had previously been underwater. It was not a smooth process, however, and the seaway would periodically rise to cover parts of the region throughout Horseshoe Canyon before finally receding altogether in the years after. Due to the changing sea levels, many different environments are represented in the Horseshoe Canyon Formation, including offshore and near-shore marine habitats and coastal habitats like lagoons, estuaries and tidal flats. Numerous coal seams represent ancient peat swamps. Like most of the other vertebrate fossils from the formation, Albertosaurus remains are found in deposits laid down in the deltas and floodplains of large rivers during the later half of Horseshoe Canyon times. The fauna of the Horseshoe Canyon Formation is well-known, as vertebrate fossils, including those of dinosaurs, are quite common. Sharks, rays, sturgeons, bowfins, gars and the gar-like Aspidorhynchus made up the fish fauna. Mammals included multituberculates and the marsupial Didelphodon. The saltwater plesiosaur Leurospondylus has been found in marine sediments in the Horseshoe Canyon, while freshwater environments were populated by turtles, Champsosaurus, and crocodilians like Leidyosuchus and Stangerochampsa. Dinosaurs dominate the fauna, especially hadrosaurs, which make up half of all dinosaurs known, including the genera Edmontosaurus, Saurolophus and Hypacrosaurus. Ceratopsians and ornithomimids were also very common, together making up another third of the known fauna. Along with much rarer ankylosaurians and pachycephalosaurs, all of these animals would have been prey for a diverse array of carnivorous theropods, including troodontids, dromaeosaurids, and caenagnathids. Intermingled with the Albertosaurus remains of the Dry Island bonebed, the bones of the small theropod Albertonykus were found. Adult Albertosaurus were the apex predators in this environment, with intermediate niches possibly filled by juvenile albertosaurs. See also Timeline of tyrannosaur research References External links Late Cretaceous dinosaurs of North America Tyrannosaurids Fossil taxa described in 1905 Taxa named by Henry Fairfield Osborn Maastrichtian life Paleontology in Alberta Maastrichtian genus first appearances Maastrichtian genus extinctions Horseshoe Canyon fauna

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

Assembly language

In computer programming, assembly language (or assembler language, or symbolic machine code), often referred to simply as Assembly and commonly abbreviated as ASM or asm, is any low-level programming language with a very strong correspondence between the instructions in the language and the architecture's machine code instructions. Assembly language usually has one statement per machine instruction (1:1), but constants, comments, assembler directives, symbolic labels of, e.g., memory locations, registers, and macros are generally also supported. The first assembly code in which a language is used to represent machine code instructions is found in Kathleen and Andrew Donald Booth's 1947 work, Coding for A.R.C.. Assembly code is converted into executable machine code by a utility program referred to as an assembler. The term "assembler" is generally attributed to Wilkes, Wheeler and Gill in their 1951 book The Preparation of Programs for an Electronic Digital Computer, who, however, used the term to mean "a program that assembles another program consisting of several sections into a single program". The conversion process is referred to as assembly, as in assembling the source code. The computational step when an assembler is processing a program is called assembly time. Because assembly depends on the machine code instructions, each assembly language is specific to a particular computer architecture. Sometimes there is more than one assembler for the same architecture, and sometimes an assembler is specific to an operating system or to particular operating systems. Most assembly languages do not provide specific syntax for operating system calls, and most assembly languages can be used universally with any operating system, as the language provides access to all the real capabilities of the processor, upon which all system call mechanisms ultimately rest. In contrast to assembly languages, most high-level programming languages are generally portable across multiple architectures but require interpreting or compiling, much more complicated tasks than assembling. In the first decades of computing, it was commonplace for both systems programming and application programming to take place entirely in assembly language. While still irreplaceable for some purposes, the majority of programming is now conducted in higher-level interpreted and compiled languages. In "No Silver Bullet", Fred Brooks summarised the effects of the switch away from assembly language programming: "Surely the most powerful stroke for software productivity, reliability, and simplicity has been the progressive use of high-level languages for programming. Most observers credit that development with at least a factor of five in productivity, and with concomitant gains in reliability, simplicity, and comprehensibility." Today, it is typical to use small amounts of assembly language code within larger systems implemented in a higher-level language, for performance reasons or to interact directly with hardware in ways unsupported by the higher-level language. For instance, just under 2% of version 4.9 of the Linux kernel source code is written in assembly; more than 97% is written in C. Assembly language syntax Assembly language uses a mnemonic to represent, e.g., each low-level machine instruction or opcode, each directive, typically also each architectural register, flag, etc. Some of the mnemonics may be built in and some user defined. Many operations require one or more operands in order to form a complete instruction. Most assemblers permit named constants, registers, and labels for program and memory locations, and can calculate expressions for operands. Thus, programmers are freed from tedious repetitive calculations and assembler programs are much more readable than machine code. Depending on the architecture, these elements may also be combined for specific instructions or addressing modes using offsets or other data as well as fixed addresses. Many assemblers offer additional mechanisms to facilitate program development, to control the assembly process, and to aid debugging. Some are column oriented, with specific fields in specific columns; this was very common for machines using punched cards in the 1950s and early 1960s. Some assemblers have free-form syntax, with fields separated by delimiters, e.g., punctuation, white space. Some assemblers are hybrid, with, e.g., labels, in a specific column and other fields separated by delimiters; this became more common than column oriented syntax in the 1960s. IBM System/360 All of the IBM assemblers for System/360, by default, have a label in column 1, fields separated by delimiters in columns 2-71, a continuation indicator in column 72 and a sequence number in columns 73-80. The delimiter for label, opcode, operands and comments is spaces, while individual operands are separated by commas and parentheses. Terminology A macro assembler is an assembler that includes a macroinstruction facility so that (parameterized) assembly language text can be represented by a name, and that name can be used to insert the expanded text into other code. Open code refers to any assembler input outside of a macro definition. A cross assembler (see also cross compiler) is an assembler that is run on a computer or operating system (the host system) of a different type from the system on which the resulting code is to run (the target system). Cross-assembling facilitates the development of programs for systems that do not have the resources to support software development, such as an embedded system or a microcontroller. In such a case, the resulting object code must be transferred to the target system, via read-only memory (ROM, EPROM, etc.), a programmer (when the read-only memory is integrated in the device, as in microcontrollers), or a data link using either an exact bit-by-bit copy of the object code or a text-based representation of that code (such as Intel hex or Motorola S-record). A high-level assembler is a program that provides language abstractions more often associated with high-level languages, such as advanced control structures (IF/THEN/ELSE, DO CASE, etc.) and high-level abstract data types, including structures/records, unions, classes, and sets. A microassembler is a program that helps prepare a microprogram, called firmware, to control the low level operation of a computer. A meta-assembler is "a program that accepts the syntactic and semantic description of an assembly language, and generates an assembler for that language", or that accepts an assembler source file along with such a description and assembles the source file in accordance with that description. "Meta-Symbol" assemblers for the SDS 9 Series and SDS Sigma series of computers are meta-assemblers. Sperry Univac also provided a Meta-Assembler for the UNIVAC 1100/2200 series. inline assembler (or embedded assembler) is assembler code contained within a high-level language program. This is most often used in systems programs which need direct access to the hardware. Key concepts Assembler An assembler program creates object code by translating combinations of mnemonics and syntax for operations and addressing modes into their numerical equivalents. This representation typically includes an operation code ("opcode") as well as other control bits and data. The assembler also calculates constant expressions and resolves symbolic names for memory locations and other entities. The use of symbolic references is a key feature of assemblers, saving tedious calculations and manual address updates after program modifications. Most assemblers also include macro facilities for performing textual substitution – e.g., to generate common short sequences of instructions as inline, instead of called subroutines. Some assemblers may also be able to perform some simple types of instruction set-specific optimizations. One concrete example of this may be the ubiquitous x86 assemblers from various vendors. Called jump-sizing, most of them are able to perform jump-instruction replacements (long jumps replaced by short or relative jumps) in any number of passes, on request. Others may even do simple rearrangement or insertion of instructions, such as some assemblers for RISC architectures that can help optimize a sensible instruction scheduling to exploit the CPU pipeline as efficiently as possible. Assemblers have been available since the 1950s, as the first step above machine language and before high-level programming languages such as Fortran, Algol, COBOL and Lisp. There have also been several classes of translators and semi-automatic code generators with properties similar to both assembly and high-level languages, with Speedcode as perhaps one of the better-known examples. There may be several assemblers with different syntax for a particular CPU or instruction set architecture. For instance, an instruction to add memory data to a register in a x86-family processor might be add eax,[ebx], in original Intel syntax, whereas this would be written addl (%ebx),%eax in the AT&T syntax used by the GNU Assembler. Despite different appearances, different syntactic forms generally generate the same numeric machine code. A single assembler may also have different modes in order to support variations in syntactic forms as well as their exact semantic interpretations (such as FASM-syntax, TASM-syntax, ideal mode, etc., in the special case of x86 assembly programming). Number of passes There are two types of assemblers based on how many passes through the source are needed (how many times the assembler reads the source) to produce the object file. One-pass assemblers process the source code once. For symbols used before they are defined, the assembler will emit "errata" after the eventual definition, telling the linker or the loader to patch the locations where the as yet undefined symbols had been used. Multi-pass assemblers create a table with all symbols and their values in the first passes, then use the table in later passes to generate code. In both cases, the assembler must be able to determine the size of each instruction on the initial passes in order to calculate the addresses of subsequent symbols. This means that if the size of an operation referring to an operand defined later depends on the type or distance of the operand, the assembler will make a pessimistic estimate when first encountering the operation, and if necessary, pad it with one or more "no-operation" instructions in a later pass or the errata. In an assembler with peephole optimization, addresses may be recalculated between passes to allow replacing pessimistic code with code tailored to the exact distance from the target. The original reason for the use of one-pass assemblers was memory size and speed of assembly – often a second pass would require storing the symbol table in memory (to handle forward references), rewinding and rereading the program source on tape, or rereading a deck of cards or punched paper tape. Later computers with much larger memories (especially disc storage), had the space to perform all necessary processing without such re-reading. The advantage of the multi-pass assembler is that the absence of errata makes the linking process (or the program load if the assembler directly produces executable code) faster. Example: in the following code snippet, a one-pass assembler would be able to determine the address of the backward reference BKWD when assembling statement S2, but would not be able to determine the address of the forward reference FWD when assembling the branch statement S1; indeed, FWD may be undefined. A two-pass assembler would determine both addresses in pass 1, so they would be known when generating code in pass 2. B ... EQU * ... EQU * ... B High-level assemblers More sophisticated high-level assemblers provide language abstractions such as: High-level procedure/function declarations and invocations Advanced control structures (IF/THEN/ELSE, SWITCH) High-level abstract data types, including structures/records, unions, classes, and sets Sophisticated macro processing (although available on ordinary assemblers since the late 1950s for, e.g., the IBM 700 series and IBM 7000 series, and since the 1960s for IBM System/360 (S/360), amongst other machines) Object-oriented programming features such as classes, objects, abstraction, polymorphism, and inheritance See Language design below for more details. Assembly language A program written in assembly language consists of a series of mnemonic processor instructions and meta-statements (known variously as declarative operations, directives, pseudo-instructions, pseudo-operations and pseudo-ops), comments and data. Assembly language instructions usually consist of an opcode mnemonic followed by an operand, which might be a list of data, arguments or parameters. Some instructions may be "implied," which means the data upon which the instruction operates is implicitly defined by the instruction itself—such an instruction does not take an operand. The resulting statement is translated by an assembler into machine language instructions that can be loaded into memory and executed. For example, the instruction below tells an x86/IA-32 processor to move an immediate 8-bit value into a register. The binary code for this instruction is 10110 followed by a 3-bit identifier for which register to use. The identifier for the AL register is 000, so the following machine code loads the AL register with the data 01100001. 10110000 01100001 This binary computer code can be made more human-readable by expressing it in hexadecimal as follows. B0 61 Here, B0 means 'Move a copy of the following value into AL, and 61 is a hexadecimal representation of the value 01100001, which is 97 in decimal. Assembly language for the 8086 family provides the mnemonic MOV (an abbreviation of move) for instructions such as this, so the machine code above can be written as follows in assembly language, complete with an explanatory comment if required, after the semicolon. This is much easier to read and to remember. MOV AL, 61h ; Load AL with 97 decimal (61 hex) In some assembly languages (including this one) the same mnemonic, such as MOV, may be used for a family of related instructions for loading, copying and moving data, whether these are immediate values, values in registers, or memory locations pointed to by values in registers or by immediate (a.k.a. direct) addresses. Other assemblers may use separate opcode mnemonics such as L for "move memory to register", ST for "move register to memory", LR for "move register to register", MVI for "move immediate operand to memory", etc. If the same mnemonic is used for different instructions, that means that the mnemonic corresponds to several different binary instruction codes, excluding data (e.g. the 61h in this example), depending on the operands that follow the mnemonic. For example, for the x86/IA-32 CPUs, the Intel assembly language syntax MOV AL, AH represents an instruction that moves the contents of register AH into register AL. The hexadecimal form of this instruction is: 88 E0 The first byte, 88h, identifies a move between a byte-sized register and either another register or memory, and the second byte, E0h, is encoded (with three bit-fields) to specify that both operands are registers, the source is AH, and the destination is AL. In a case like this where the same mnemonic can represent more than one binary instruction, the assembler determines which instruction to generate by examining the operands. In the first example, the operand 61h is a valid hexadecimal numeric constant and is not a valid register name, so only the B0 instruction can be applicable. In the second example, the operand AH is a valid register name and not a valid numeric constant (hexadecimal, decimal, octal, or binary), so only the 88 instruction can be applicable. Assembly languages are always designed so that this sort of unambiguousness is universally enforced by their syntax. For example, in the Intel x86 assembly language, a hexadecimal constant must start with a numeral digit, so that the hexadecimal number 'A' (equal to decimal ten) would be written as 0Ah or 0AH, not AH, specifically so that it cannot appear to be the name of register AH. (The same rule also prevents ambiguity with the names of registers BH, CH, and DH, as well as with any user-defined symbol that ends with the letter H and otherwise contains only characters that are hexadecimal digits, such as the word "BEACH".) Returning to the original example, while the x86 opcode 10110000 (B0) copies an 8-bit value into the AL register, 10110001 (B1) moves it into CL and 10110010 (B2) does so into DL. Assembly language examples for these follow. MOV AL, 1h ; Load AL with immediate value 1 MOV CL, 2h ; Load CL with immediate value 2 MOV DL, 3h ; Load DL with immediate value 3 The syntax of MOV can also be more complex as the following examples show. MOV EAX, [EBX] ; Move the 4 bytes in memory at the address contained in EBX into EAX MOV [ESI+EAX], CL ; Move the contents of CL into the byte at address ESI+EAX MOV DS, DX ; Move the contents of DX into segment register DS In each case, the MOV mnemonic is translated directly into one of the opcodes 88-8C, 8E, A0-A3, B0-BF, C6 or C7 by an assembler, and the programmer normally does not have to know or remember which. Transforming assembly language into machine code is the job of an assembler, and the reverse can at least partially be achieved by a disassembler. Unlike high-level languages, there is a one-to-one correspondence between many simple assembly statements and machine language instructions. However, in some cases, an assembler may provide pseudoinstructions (essentially macros) which expand into several machine language instructions to provide commonly needed functionality. For example, for a machine that lacks a "branch if greater or equal" instruction, an assembler may provide a pseudoinstruction that expands to the machine's "set if less than" and "branch if zero (on the result of the set instruction)". Most full-featured assemblers also provide a rich macro language (discussed below) which is used by vendors and programmers to generate more complex code and data sequences. Since the information about pseudoinstructions and macros defined in the assembler environment is not present in the object program, a disassembler cannot reconstruct the macro and pseudoinstruction invocations but can only disassemble the actual machine instructions that the assembler generated from those abstract assembly-language entities. Likewise, since comments in the assembly language source file are ignored by the assembler and have no effect on the object code it generates, a disassembler is always completely unable to recover source comments. Each computer architecture has its own machine language. Computers differ in the number and type of operations they support, in the different sizes and numbers of registers, and in the representations of data in storage. While most general-purpose computers are able to carry out essentially the same functionality, the ways they do so differ; the corresponding assembly languages reflect these differences. Multiple sets of mnemonics or assembly-language syntax may exist for a single instruction set, typically instantiated in different assembler programs. In these cases, the most popular one is usually that supplied by the CPU manufacturer and used in its documentation. Two examples of CPUs that have two different sets of mnemonics are the Intel 8080 family and the Intel 8086/8088. Because Intel claimed copyright on its assembly language mnemonics (on each page of their documentation published in the 1970s and early 1980s, at least), some companies that independently produced CPUs compatible with Intel instruction sets invented their own mnemonics. The Zilog Z80 CPU, an enhancement of the Intel 8080A, supports all the 8080A instructions plus many more; Zilog invented an entirely new assembly language, not only for the new instructions but also for all of the 8080A instructions. For example, where Intel uses the mnemonics MOV, MVI, LDA, STA, LXI, LDAX, STAX, LHLD, and SHLD for various data transfer instructions, the Z80 assembly language uses the mnemonic LD for all of them. A similar case is the NEC V20 and V30 CPUs, enhanced copies of the Intel 8086 and 8088, respectively. Like Zilog with the Z80, NEC invented new mnemonics for all of the 8086 and 8088 instructions, to avoid accusations of infringement of Intel's copyright. (It is questionable whether such copyrights can be valid, and later CPU companies such as AMD and Cyrix republished Intel's x86/IA-32 instruction mnemonics exactly with neither permission nor legal penalty.) It is doubtful whether in practice many people who programmed the V20 and V30 actually wrote in NEC's assembly language rather than Intel's; since any two assembly languages for the same instruction set architecture are isomorphic (somewhat like English and Pig Latin), there is no requirement to use a manufacturer's own published assembly language with that manufacturer's products. Language design Basic elements There is a large degree of diversity in the way the authors of assemblers categorize statements and in the nomenclature that they use. In particular, some describe anything other than a machine mnemonic or extended mnemonic as a pseudo-operation (pseudo-op). A typical assembly language consists of 3 types of instruction statements that are used to define program operations: Opcode mnemonics Data definitions Assembly directives Opcode mnemonics and extended mnemonics Instructions (statements) in assembly language are generally very simple, unlike those in high-level languages. Generally, a mnemonic is a symbolic name for a single executable machine language instruction (an opcode), and there is at least one opcode mnemonic defined for each machine language instruction. Each instruction typically consists of an operation or opcode plus zero or more operands. Most instructions refer to a single value or a pair of values. Operands can be immediate (value coded in the instruction itself), registers specified in the instruction or implied, or the addresses of data located elsewhere in storage. This is determined by the underlying processor architecture: the assembler merely reflects how this architecture works. Extended mnemonics are often used to specify a combination of an opcode with a specific operand, e.g., the System/360 assemblers use as an extended mnemonic for with a mask of 15 and ("NO OPeration" – do nothing for one step) for with a mask of 0. Extended mnemonics are often used to support specialized uses of instructions, often for purposes not obvious from the instruction name. For example, many CPU's do not have an explicit NOP instruction, but do have instructions that can be used for the purpose. In 8086 CPUs the instruction is used for , with being a pseudo-opcode to encode the instruction . Some disassemblers recognize this and will decode the instruction as . Similarly, IBM assemblers for System/360 and System/370 use the extended mnemonics and for and with zero masks. For the SPARC architecture, these are known as synthetic instructions. Some assemblers also support simple built-in macro-instructions that generate two or more machine instructions. For instance, with some Z80 assemblers the instruction is recognized to generate followed by . These are sometimes known as pseudo-opcodes. Mnemonics are arbitrary symbols; in 1985 the IEEE published Standard 694 for a uniform set of mnemonics to be used by all assemblers. The standard has since been withdrawn. Data directives There are instructions used to define data elements to hold data and variables. They define the type of data, the length and the alignment of data. These instructions can also define whether the data is available to outside programs (programs assembled separately) or only to the program in which the data section is defined. Some assemblers classify these as pseudo-ops. Assembly directives Assembly directives, also called pseudo-opcodes, pseudo-operations or pseudo-ops, are commands given to an assembler "directing it to perform operations other than assembling instructions". Directives affect how the assembler operates and "may affect the object code, the symbol table, the listing file, and the values of internal assembler parameters". Sometimes the term pseudo-opcode is reserved for directives that generate object code, such as those that generate data. The names of pseudo-ops often start with a dot to distinguish them from machine instructions. Pseudo-ops can make the assembly of the program dependent on parameters input by a programmer, so that one program can be assembled in different ways, perhaps for different applications. Or, a pseudo-op can be used to manipulate presentation of a program to make it easier to read and maintain. Another common use of pseudo-ops is to reserve storage areas for run-time data and optionally initialize their contents to known values. Symbolic assemblers let programmers associate arbitrary names (labels or symbols) with memory locations and various constants. Usually, every constant and variable is given a name so instructions can reference those locations by name, thus promoting self-documenting code. In executable code, the name of each subroutine is associated with its entry point, so any calls to a subroutine can use its name. Inside subroutines, GOTO destinations are given labels. Some assemblers support local symbols which are often lexically distinct from normal symbols (e.g., the use of "10$" as a GOTO destination). Some assemblers, such as NASM, provide flexible symbol management, letting programmers manage different namespaces, automatically calculate offsets within data structures, and assign labels that refer to literal values or the result of simple computations performed by the assembler. Labels can also be used to initialize constants and variables with relocatable addresses. Assembly languages, like most other computer languages, allow comments to be added to program source code that will be ignored during assembly. Judicious commenting is essential in assembly language programs, as the meaning and purpose of a sequence of binary machine instructions can be difficult to determine. The "raw" (uncommented) assembly language generated by compilers or disassemblers is quite difficult to read when changes must be made. Macros Many assemblers support predefined macros, and others support programmer-defined (and repeatedly re-definable) macros involving sequences of text lines in which variables and constants are embedded. The macro definition is most commonly a mixture of assembler statements, e.g., directives, symbolic machine instructions, and templates for assembler statements. This sequence of text lines may include opcodes or directives. Once a macro has been defined its name may be used in place of a mnemonic. When the assembler processes such a statement, it replaces the statement with the text lines associated with that macro, then processes them as if they existed in the source code file (including, in some assemblers, expansion of any macros existing in the replacement text). Macros in this sense date to IBM autocoders of the 1950s. Macro assemblers typically have directives to, e.g., define macros, define variables, set variables to the result of an arithmetic, logical or string expression, iterate, conditionally generate code. Some of those directives may be restricted to use within a macro definition, e.g., MEXIT in HLASM, while others may be permitted within open code (outside macro definitions), e.g., AIF and COPY in HLASM. In assembly language, the term "macro" represents a more comprehensive concept than it does in some other contexts, such as the pre-processor in the C programming language, where its #define directive typically is used to create short single line macros. Assembler macro instructions, like macros in PL/I and some other languages, can be lengthy "programs" by themselves, executed by interpretation by the assembler during assembly. Since macros can have 'short' names but expand to several or indeed many lines of code, they can be used to make assembly language programs appear to be far shorter, requiring fewer lines of source code, as with higher level languages. They can also be used to add higher levels of structure to assembly programs, optionally introduce embedded debugging code via parameters and other similar features. Macro assemblers often allow macros to take parameters. Some assemblers include quite sophisticated macro languages, incorporating such high-level language elements as optional parameters, symbolic variables, conditionals, string manipulation, and arithmetic operations, all usable during the execution of a given macro, and allowing macros to save context or exchange information. Thus a macro might generate numerous assembly language instructions or data definitions, based on the macro arguments. This could be used to generate record-style data structures or "unrolled" loops, for example, or could generate entire algorithms based on complex parameters. For instance, a "sort" macro could accept the specification of a complex sort key and generate code crafted for that specific key, not needing the run-time tests that would be required for a general procedure interpreting the specification. An organization using assembly language that has been heavily extended using such a macro suite can be considered to be working in a higher-level language since such programmers are not working with a computer's lowest-level conceptual elements. Underlining this point, macros were used to implement an early virtual machine in SNOBOL4 (1967), which was written in the SNOBOL Implementation Language (SIL), an assembly language for a virtual machine. The target machine would translate this to its native code using a macro assembler. This allowed a high degree of portability for the time. Macros were used to customize large scale software systems for specific customers in the mainframe era and were also used by customer personnel to satisfy their employers' needs by making specific versions of manufacturer operating systems. This was done, for example, by systems programmers working with IBM's Conversational Monitor System / Virtual Machine (VM/CMS) and with IBM's "real time transaction processing" add-ons, Customer Information Control System CICS, and ACP/TPF, the airline/financial system that began in the 1970s and still runs many large computer reservation systems (CRS) and credit card systems today. It is also possible to use solely the macro processing abilities of an assembler to generate code written in completely different languages, for example, to generate a version of a program in COBOL using a pure macro assembler program containing lines of COBOL code inside assembly time operators instructing the assembler to generate arbitrary code. IBM OS/360 uses macros to perform system generation. The user specifies options by coding a series of assembler macros. Assembling these macros generates a job stream to build the system, including job control language and utility control statements. This is because, as was realized in the 1960s, the concept of "macro processing" is independent of the concept of "assembly", the former being in modern terms more word processing, text processing, than generating object code. The concept of macro processing appeared, and appears, in the C programming language, which supports "preprocessor instructions" to set variables, and make conditional tests on their values. Unlike certain previous macro processors inside assemblers, the C preprocessor is not Turing-complete because it lacks the ability to either loop or "go to", the latter allowing programs to loop. Despite the power of macro processing, it fell into disuse in many high level languages (major exceptions being C, C++ and PL/I) while remaining a perennial for assemblers. Macro parameter substitution is strictly by name: at macro processing time, the value of a parameter is textually substituted for its name. The most famous class of bugs resulting was the use of a parameter that itself was an expression and not a simple name when the macro writer expected a name. In the macro: foo: macro a load a*b the intention was that the caller would provide the name of a variable, and the "global" variable or constant b would be used to multiply "a". If foo is called with the parameter a-c, the macro expansion of load a-c*b occurs. To avoid any possible ambiguity, users of macro processors can parenthesize formal parameters inside macro definitions, or callers can parenthesize the input parameters. Support for structured programming Packages of macros have been written providing structured programming elements to encode execution flow. The earliest example of this approach was in the Concept-14 macro set, originally proposed by Harlan Mills (March 1970), and implemented by Marvin Kessler at IBM's Federal Systems Division, which provided IF/ELSE/ENDIF and similar control flow blocks for OS/360 assembler programs. This was a way to reduce or eliminate the use of GOTO operations in assembly code, one of the main factors causing spaghetti code in assembly language. This approach was widely accepted in the early 1980s (the latter days of large-scale assembly language use). IBM's High Level Assembler Toolkit includes such a macro package. A curious design was A-Natural, a "stream-oriented" assembler for 8080/Z80, processors from Whitesmiths Ltd. (developers of the Unix-like Idris operating system, and what was reported to be the first commercial C compiler). The language was classified as an assembler because it worked with raw machine elements such as opcodes, registers, and memory references; but it incorporated an expression syntax to indicate execution order. Parentheses and other special symbols, along with block-oriented structured programming constructs, controlled the sequence of the generated instructions. A-natural was built as the object language of a C compiler, rather than for hand-coding, but its logical syntax won some fans. There has been little apparent demand for more sophisticated assemblers since the decline of large-scale assembly language development. In spite of that, they are still being developed and applied in cases where resource constraints or peculiarities in the target system's architecture prevent the effective use of higher-level languages. Assemblers with a strong macro engine allow structured programming via macros, such as the switch macro provided with the Masm32 package (this code is a complete program): include \masm32\include\masm32rt.inc ; use the Masm32 library .code demomain: REPEAT 20 switch rv(nrandom, 9) ; generate a number between 0 and 8 mov ecx, 7 case 0 print "case 0" case ecx ; in contrast to most other programming languages, print "case 7" ; the Masm32 switch allows "variable cases" case 1 .. 3 .if eax==1 print "case 1" .elseif eax==2 print "case 2" .else print "cases 1 to 3: other" .endif case 4, 6, 8 print "cases 4, 6 or 8" default mov ebx, 19 ; print 20 stars .Repeat print "*" dec ebx .Until Sign? ; loop until the sign flag is set endsw print chr$(13, 10) ENDM exit end demomain Use of assembly language Historical perspective Assembly languages were not available at the time when the stored-program computer was introduced. Kathleen Booth "is credited with inventing assembly language" based on theoretical work she began in 1947, while working on the ARC2 at Birkbeck, University of London following consultation by Andrew Booth (later her husband) with mathematician John von Neumann and physicist Herman Goldstine at the Institute for Advanced Study. In late 1948, the Electronic Delay Storage Automatic Calculator (EDSAC) had an assembler (named "initial orders") integrated into its bootstrap program. It used one-letter mnemonics developed by David Wheeler, who is credited by the IEEE Computer Society as the creator of the first "assembler". Reports on the EDSAC introduced the term "assembly" for the process of combining fields into an instruction word. SOAP (Symbolic Optimal Assembly Program) was an assembly language for the IBM 650 computer written by Stan Poley in 1955. Assembly languages eliminate much of the error-prone, tedious, and time-consuming first-generation programming needed with the earliest computers, freeing programmers from tedium such as remembering numeric codes and calculating addresses. They were once widely used for all sorts of programming. However, by the late 1950s, their use had largely been supplanted by higher-level languages, in the search for improved programming productivity. Today, assembly language is still used for direct hardware manipulation, access to specialized processor instructions, or to address critical performance issues. Typical uses are device drivers, low-level embedded systems, and real-time systems (see ). Numerous programs have been written entirely in assembly language. The Burroughs MCP (1961) was the first computer for which an operating system was not developed entirely in assembly language; it was written in Executive Systems Problem Oriented Language (ESPOL), an Algol dialect. Many commercial applications were written in assembly language as well, including a large amount of the IBM mainframe software written by large corporations. COBOL, FORTRAN and some PL/I eventually displaced much of this work, although a number of large organizations retained assembly-language application infrastructures well into the 1990s. Assembly language has long been the primary development language for 8-bit home computers such Atari 8-bit family, Apple II, MSX, ZX Spectrum, and Commodore 64. Interpreted BASIC dialects on these systems offer insufficient execution speed and insufficient facilities to take full advantage of the available hardware. These systems have severe resource constraints, idiosyncratic memory and display architectures, and provide limited system services. There are also few high-level language compilers suitable for microcomputer use. Similarly, assembly language is the default choice for 8-bit consoles such as the Atari 2600 and Nintendo Entertainment System. Key software for IBM PC compatibles was written in assembly language, such as MS-DOS, Turbo Pascal, and the Lotus 1-2-3 spreadsheet. As computer speed grew exponentially, assembly language became a tool for speeding up parts of programs, such as the rendering of Doom, rather than a dominant development language. In the 1990s, assembly language was used to get performance out of systems such as the Sega Saturn and as the primary language for arcade hardware based on the TMS34010 integrated CPU/GPU such as Mortal Kombat and NBA Jam. Current usage There has been debate over the usefulness and performance of assembly language relative to high-level languages. Although assembly language has specific niche uses where it is important (see below), there are other tools for optimization. , the TIOBE index of programming language popularity ranks assembly language at 11, ahead of Visual Basic, for example. Assembler can be used to optimize for speed or optimize for size. In the case of speed optimization, modern optimizing compilers are claimed to render high-level languages into code that can run as fast as hand-written assembly, despite the counter-examples that can be found. The complexity of modern processors and memory sub-systems makes effective optimization increasingly difficult for compilers, as well as for assembly programmers. Moreover, increasing processor performance has meant that most CPUs sit idle most of the time, with delays caused by predictable bottlenecks such as cache misses, I/O operations and paging. This has made raw code execution speed a non-issue for many programmers. There are some situations in which developers might choose to use assembly language: Writing code for systems with that have limited high-level language options such as the Atari 2600, Commodore 64, and graphing calculators. Programs for these computers of the 1970s and 1980s are often written in the context of demoscene or retrogaming subcultures. Code that must interact directly with the hardware, for example in device drivers and interrupt handlers. In an embedded processor or DSP, high-repetition interrupts require the shortest number of cycles per interrupt, such as an interrupt that occurs 1000 or 10000 times a second. Programs that need to use processor-specific instructions not implemented in a compiler. A common example is the bitwise rotation instruction at the core of many encryption algorithms, as well as querying the parity of a byte or the 4-bit carry of an addition. A stand-alone executable of compact size is required that must execute without recourse to the run-time components or libraries associated with a high-level language. Examples have included firmware for telephones, automobile fuel and ignition systems, air-conditioning control systems, security systems, and sensors. Programs with performance-sensitive inner loops, where assembly language provides optimization opportunities that are difficult to achieve in a high-level language. For example, linear algebra with BLAS or discrete cosine transformation (e.g. SIMD assembly version from x264). Programs that create vectorized functions for programs in higher-level languages such as C. In the higher-level language this is sometimes aided by compiler intrinsic functions which map directly to SIMD mnemonics, but nevertheless result in a one-to-one assembly conversion specific for the given vector processor. Real-time programs such as simulations, flight navigation systems, and medical equipment. For example, in a fly-by-wire system, telemetry must be interpreted and acted upon within strict time constraints. Such systems must eliminate sources of unpredictable delays, which may be created by (some) interpreted languages, automatic garbage collection, paging operations, or preemptive multitasking. However, some higher-level languages incorporate run-time components and operating system interfaces that can introduce such delays. Choosing assembly or lower level languages for such systems gives programmers greater visibility and control over processing details. Cryptographic algorithms that must always take strictly the same time to execute, preventing timing attacks. Video encoders and decoders such as rav1e (an encoder for AV1) and dav1d (the reference decoder for AV1) contain assembly to leverage AVX2 and ARM Neon instructions when available. Modify and extend legacy code written for IBM mainframe computers. Situations where complete control over the environment is required, in extremely high-security situations where nothing can be taken for granted. Computer viruses, bootloaders, certain device drivers, or other items very close to the hardware or low-level operating system. Instruction set simulators for monitoring, tracing and debugging where additional overhead is kept to a minimum. Situations where no high-level language exists, on a new or specialized processor for which no cross compiler is available. Reverse-engineering and modifying program files such as: existing binaries that may or may not have originally been written in a high-level language, for example when trying to recreate programs for which source code is not available or has been lost, or cracking copy protection of proprietary software. Video games (also termed ROM hacking), which is possible via several methods. The most widely employed method is altering program code at the assembly language level. Assembly language is still taught in most computer science and electronic engineering programs. Although few programmers today regularly work with assembly language as a tool, the underlying concepts remain important. Such fundamental topics as binary arithmetic, memory allocation, stack processing, character set encoding, interrupt processing, and compiler design would be hard to study in detail without a grasp of how a computer operates at the hardware level. Since a computer's behavior is fundamentally defined by its instruction set, the logical way to learn such concepts is to study an assembly language. Most modern computers have similar instruction sets. Therefore, studying a single assembly language is sufficient to learn: I) the basic concepts; II) to recognize situations where the use of assembly language might be appropriate; and III) to see how efficient executable code can be created from high-level languages. Typical applications Assembly language is typically used in a system's boot code, the low-level code that initializes and tests the system hardware prior to booting the operating system and is often stored in ROM. (BIOS on IBM-compatible PC systems and CP/M is an example.) Assembly language is often used for low-level code, for instance for operating system kernels, which cannot rely on the availability of pre-existing system calls and must indeed implement them for the particular processor architecture on which the system will be running. Some compilers translate high-level languages into assembly first before fully compiling, allowing the assembly code to be viewed for debugging and optimization purposes. Some compilers for relatively low-level languages, such as Pascal or C, allow the programmer to embed assembly language directly in the source code (so called inline assembly). Programs using such facilities can then construct abstractions using different assembly language on each hardware platform. The system's portable code can then use these processor-specific components through a uniform interface. Assembly language is useful in reverse engineering. Many programs are distributed only in machine code form which is straightforward to translate into assembly language by a disassembler, but more difficult to translate into a higher-level language through a decompiler. Tools such as the Interactive Disassembler make extensive use of disassembly for such a purpose. This technique is used by hackers to crack commercial software, and competitors to produce software with similar results from competing companies. Assembly language is used to enhance speed of execution, especially in early personal computers with limited processing power and RAM. Assemblers can be used to generate blocks of data, with no high-level language overhead, from formatted and commented source code, to be used by other code. See also Compiler Comparison of assemblers Disassembler Hexadecimal Instruction set architecture Little man computer – an educational computer model with a base-10 assembly language Nibble Typed assembly language Notes References Further reading (2+xiv+270+6 pages) Kann, Charles W. (2021). "Introduction to Assembly Language Programming: From Soup to Nuts: ARM Edition" ("An online book full of helpful ASM info, tutorials and code examples" by the ASM Community, archived at the internet archive.) External links Unix Assembly Language Programming Linux Assembly PPR: Learning Assembly Language NASM – The Netwide Assembler (a popular assembly language) Assembly Language Programming Examples Authoring Windows Applications In Assembly Language Assembly Optimization Tips by Mark Larson The table for assembly language to machine code Assembly language Computer-related introductions in 1949 Embedded systems Low-level programming languages Programming language implementation Programming languages created in 1949

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

Ambrosia

In the ancient Greek myths, ambrosia (, ), the food or drink of the Greek gods, is often depicted as conferring longevity or immortality upon whoever consumed it. It was brought to the gods in Olympus by doves and served either by Hebe or by Ganymede at the heavenly feast. Ancient art sometimes depicted ambrosia as distributed by the nymph named Ambrosia, a nurse of Dionysus. Definition Ambrosia is very closely related to the gods' other form of sustenance, nectar. The two terms may not have originally been distinguished; though in Homer's poems nectar is usually the drink and ambrosia the food of the gods; it was with ambrosia that Hera "cleansed all defilement from her lovely flesh", and with ambrosia Athena prepared Penelope in her sleep, so that when she appeared for the final time before her suitors, the effects of years had been stripped away, and they were inflamed with passion at the sight of her. On the other hand, in Alcman, nectar is the food, and in Sappho and Anaxandrides, ambrosia is the drink. A character in Aristophanes' Knights says, "I dreamed the goddess poured ambrosia over your head—out of a ladle." Both descriptions could be correct, as ambrosia could be a liquid considered a food (such as honey). The consumption of ambrosia was typically reserved for divine beings. Upon his assumption into immortality on Olympus, Heracles is given ambrosia by Athena, while the hero Tydeus is denied the same thing when the goddess discovers him eating human brains. In one version of the myth of Tantalus, part of Tantalus' crime is that after tasting ambrosia himself, he attempts to steal some to give to other mortals. Those who consume ambrosia typically have ichor, not blood, in their veins. Both nectar and ambrosia are fragrant, and may be used as perfume: in the Odyssey Menelaus and his men are disguised as seals in untanned seal skins, "and the deadly smell of the seal skins vexed us sore; but the goddess saved us; she brought ambrosia and put it under our nostrils." Homer speaks of ambrosial raiment, ambrosial locks of hair, even the gods' ambrosial sandals. Among later writers, ambrosia has been so often used with generic meanings of "delightful liquid" that such late writers as Athenaeus, Paulus and Dioscurides employ it as a technical term in contexts of cookery, medicine, and botany. Pliny used the term in connection with different plants, as did early herbalists. Additionally, some modern ethnomycologists, such as Danny Staples, identify ambrosia with the hallucinogenic mushroom Amanita muscaria: "it was the food of the gods, their ambrosia, and nectar was the pressed sap of its juices", Staples asserts. W. H. Roscher thinks that both nectar and ambrosia were kinds of honey, in which case their power of conferring immortality would be due to the supposed healing and cleansing powers of honey, and because fermented honey (mead) preceded wine as an entheogen in the Aegean world; on some Minoan seals, goddesses were represented with bee faces (compare Merope and Melissa). Etymology The concept of an immortality drink is attested in at least two ancient Indo-European languages: Greek and Sanskrit. The Greek ἀμβροσία (ambrosia) is semantically linked to the Sanskrit (amṛta) as both words denote a drink or food that gods use to achieve immortality. The two words appear to be derived from the same Indo-European form *ṇ-mṛ-tós, "un-dying" (n-: negative prefix from which the prefix a- in both Greek and Sanskrit are derived; mṛ: zero grade of *mer-, "to die"; and -to-: adjectival suffix). A semantically similar etymology exists for nectar, the beverage of the gods (Greek: νέκταρ néktar) presumed to be a compound of the PIE roots *nek-, "death", and -*tar, "overcoming". Other examples in mythology In one version of the story of the birth of Achilles, Thetis anoints the infant with ambrosia and passes the child through the fire to make him immortal but Peleus, appalled, stops her, leaving only his heel unimmortalised (Argonautica 4.869–879). In the Iliad xvi, Apollo washes the black blood from the corpse of Sarpedon and anoints it with ambrosia, readying it for its dreamlike return to Sarpedon's native Lycia. Similarly, Thetis anoints the corpse of Patroclus in order to preserve it. Ambrosia and nectar are depicted as unguents (xiv. 170; xix. 38). In the Odyssey, Calypso is described as having "spread a table with ambrosia and set it by Hermes, and mixed the rosy-red nectar." It is ambiguous whether he means the ambrosia itself is rosy-red, or if he is describing a rosy-red nectar Hermes drinks along with the ambrosia. Later, Circe mentions to Odysseus that a flock of doves are the bringers of ambrosia to Olympus. In the Odyssey (ix.345–359), Polyphemus likens the wine given to him by Odysseus to ambrosia and nectar. One of the impieties of Tantalus, according to Pindar, was that he offered to his guests the ambrosia of the Deathless Ones, a theft akin to that of Prometheus, Karl Kerenyi noted (in Heroes of the Greeks). In the Homeric hymn to Aphrodite, the goddess uses "ambrosial bridal oil that she had ready perfumed." In the story of Eros and Psyche as told by Apuleius, Psyche is given ambrosia upon her completion of the quests set by Aphrodite and her acceptance on Olympus. After she partakes, she and Eros are wed as gods. In the Aeneid, Aeneas encounters his mother in an alternate, or illusory form. When she became her godly form "Her hair's ambrosia breathed a holy fragrance." Ambrosia (nymph) Lycurgus, king of Thrace, forbade the cult of Dionysus, whom he drove from Thrace, and attacked the gods' entourage when they celebrated the god. Among them was Ambrosia, who turned herself into a grapevine to hide from his wrath. Dionysus, enraged by the king's actions, drove him mad. In his fit of insanity he killed his son, whom he mistook for a stock of ivy, and then himself. In popular culture In The Sims 3 and 4, ambrosia is a special meal that can resurrect the ghosts of dead Sims or reset living Sims to the beginning of their current life stage. In the manga series Record of Ragnarok, the Ambrosia is referred to as the blood of Zeus. The mortal Alcides ends up drinking the Ambrosia and after surviving it, gains immortality and a position as a demi-God. He is adopted by Zeus and Hera and in turn his name is changed to Heracles. In the original Battlestar Galactica ambrosia is the name of an alcoholic drink prized in the Twelve Colonies for becoming more and more exquisite with extreme aging. In the episode "The Long Patrol" caches of centuries-old ambrosia are considered a priceless treasure. See also Elixir of life, a potion sought by alchemy to produce immortality Ichor, blood of the Greek gods, related to ambrosia Iðunn's apples in Norse mythology Manna, food given by God to the Israelites Peaches of Immortality in Chinese mythology Pill of Immortality Silphium Soma (drink), a ritual drink of importance among the early Vedic peoples and Indo-Iranians. References Sources Clay, Jenny Strauss, "Immortal and ageless forever", The Classical Journal 77.2 (December 1981:pp. 112–117). Ruck, Carl A.P. and Danny Staples, The World of Classical Myth 1994, p. 26 et seq. Wright, F. A., "The Food of the Gods", The Classical Review 31.1, (February 1917:4–6). External links Ancient Greek cuisine Fictional food and drink Mount Olympus Mythological medicines and drugs Mythological food and drink

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Ambrose

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

1371

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

Ambracia

Ambracia (; , occasionally , Ampracia) was a city of ancient Greece on the site of modern Arta. It was captured by the Corinthians in 625 BC and was situated about from the Ambracian Gulf, on a bend of the navigable river Arachthos (or Aratthus), in the midst of a fertile wooded plain. History Ambracia was founded between 650 and 625 BC by Gorgus, son of the Corinthian tyrant Cypselus, at which time its economy was based on farmlands, fishing, timber for shipbuilding, and the exportation of the produce of Epirus. After the expulsion of Gorgus's son Periander its government developed into a strong democracy. The early policy of Ambracia was determined by its loyalty to Corinth (for which it probably served as an entrepot in the Epirus trade), and its consequent aversion to Corcyra (as Ambracia participated on the Corinthian side at the Battle of Sybota, which took place in 433 BC between the rebellious Corinthian colony of Corcyra (modern Corfu) and Corinth). Ambraciot politics featured many frontier disputes with the Amphilochians and Acarnanians. Hence it took a prominent part in the Peloponnesian War until the crushing defeat at Idomene (426), which crippled its resources. In the 4th century BC it continued its traditional policy, but in 338 was besieged by Philip II of Macedon. With the assistance of Corinth and Athens, it escaped complete domination at Philip's hands, but was nevertheless forced to accept a Macedonian garrison. In 294 BC, after forty-three years of semi-autonomy under Macedonian suzerainty, Ambracia was given by the son of Cassander to Pyrrhus, king of Epirus, who made it his capital, and adorned it with palace, temples and theatres. In the wars of Philip V of Macedon and the Epirotes against the Aetolian League (220–205) Ambracia passed from one alliance to the other, but ultimately joined the latter confederacy. During the struggle of the Aetolians against Rome, it stood a stubborn siege, including the first known use of poison gas against the Romans' siege tunnels. Ambracia was captured and plundered by Marcus Fulvius Nobilior in 189 BC, after which it was declared by Rome a "free city", and gradually fell into insignificance. The foundation by Augustus of Nicopolis, into which the remaining inhabitants were drafted, left the site desolate. In Byzantine times a new settlement took its place under the name of Arta. Some fragmentary walls of large, well-dressed blocks near this latter town indicate the early prosperity of Ambracia. Ambraciotes Artists Epigonus of Ambracia, 6th BC musician Nicocles, auletes Hippasus, tragic actor Epicrates of Ambracia, c. 4th BC comic poet Athletes Sophron, Stadion Olympics 432 BC Tlasimachus, Tethrippon and Synoris Olympics 296 BC Andromachus, Stadion Olympics 60 BC Various Silanus of Ambracia, 5th BC seer Cleombrotus of Ambracia, student of Plato See also List of cities in ancient Epirus List of ancient Greek cities References Attribution: Cities in ancient Epirus Populated places established in the 7th century BC Corinthian colonies Former populated places in Greece Populated places in ancient Acarnania Populated places in ancient Epirus Pyrrhus of Epirus Archaeological sites in Epirus (region) Arta, Greece

1372

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

Amber

Amber is fossilized tree resin that has been appreciated for its color and natural beauty since Neolithic times. Much valued from antiquity to the present as a gemstone, amber is made into a variety of decorative objects. Amber is used in jewelry and has been used as a healing agent in folk medicine. There are five classes of amber, defined on the basis of their chemical constituents. Because it originates as a soft, sticky tree resin, amber sometimes contains animal and plant material as inclusions. Amber occurring in coal seams is also called resinite, and the term ambrite is applied to that found specifically within New Zealand coal seams. Etymology The English word amber derives from Arabic (ultimately from Middle Persian ambar) via Middle Latin ambar and Middle French ambre. The word referred to what is now known as ambergris (ambre gris or "grey amber"), a solid waxy substance derived from the sperm whale. The word, in its sense of "ambergris," was adopted in Middle English in the 14th century. In the Romance languages, the sense of the word was extended to Baltic amber (fossil resin) from as early as the late 13th century. At first called white or yellow amber (ambre jaune), this meaning was adopted in English by the early 15th century. As the use of ambergris waned, this became the main sense of the word. The two substances ("yellow amber" and "grey amber") conceivably became associated or confused because they both were found washed up on beaches. Ambergris is less dense than water and floats, whereas amber is too dense to float, though less dense than stone. The classical names for amber, Latin electrum and Ancient Greek (ēlektron), are connected to a term ἠλέκτωρ (ēlektōr) meaning "beaming Sun". According to myth, when Phaëton son of Helios (the Sun) was killed, his mourning sisters became poplar trees, and their tears became elektron, amber. The word elektron gave rise to the words electric, electricity, and their relatives because of amber's ability to bear a charge of static electricity. Pliny the Elder says that the German name of amber was glæsum, "for which reason the Romans, when Germanicus commanded the fleet in those parts, gave to one of these islands the name of Glæsaria, which by the barbarians was known as Austeravia". This is confirmed by the recorded Old High German word glas and by the Old English word glær for "amber" (compare glass). In Middle Low German, amber was known as berne-, barn-, börnstēn (with etymological roots related to "burn" and to "stone"). The Low German term became dominant also in High German by the 18th century, thus modern German Bernstein besides Dutch barnsteen. In the Baltic languages, the Lithuanian term for amber is gintaras and the Latvian dzintars. These words, and the Slavic jantar and Hungarian gyanta ('resin'), are thought to originate from Phoenician jainitar ("sea-resin"). History Theophrastus discussed amber in the 4th century BCE, as did Pytheas (), whose work "On the Ocean" is lost, but was referenced by Pliny, according to whose Natural History (in what is also the earliest known mention of the name Germania): Earlier Pliny says that Pytheas refers to a large island—three days' sail from the Scythian coast and called Balcia by Xenophon of Lampsacus (author of a fanciful travel book in Greek)—as Basilia—a name generally equated with Abalus. Given the presence of amber, the island could have been Heligoland, Zealand, the shores of Gdańsk Bay, the Sambia Peninsula or the Curonian Lagoon, which were historically the richest sources of amber in northern Europe. It is assumed that there were well-established trade routes for amber connecting the Baltic with the Mediterranean (known as the "Amber Road"). Pliny states explicitly that the Germans exported amber to Pannonia, from where the Veneti distributed it onwards. The ancient Italic peoples of southern Italy used to work amber; the National Archaeological Museum of Siritide (Museo Archeologico Nazionale della Siritide) at Policoro in the province of Matera (Basilicata) displays important surviving examples. Amber used in antiquity, as at Mycenae and in the prehistory of the Mediterranean, comes from deposits in Sicily. Pliny also cites the opinion of Nicias ( 470–413 BCE), according to whom amber Besides the fanciful explanations according to which amber is "produced by the Sun", Pliny cites opinions that are well aware of its origin in tree resin, citing the native Latin name of succinum (sūcinum, from sucus "juice"). In Book 37, section XI of Natural History, Pliny wrote: He also states that amber is also found in Egypt and India, and he even refers to the electrostatic properties of amber, by saying that "in Syria the women make the whorls of their spindles of this substance, and give it the name of harpax [from ἁρπάζω, "to drag"] from the circumstance that it attracts leaves towards it, chaff, and the light fringe of tissues". Amber has a long history of use in China, with the first written record from 200 BCE. Early in the 19th century, the first reports of amber found in North America came from discoveries in New Jersey along Crosswicks Creek near Trenton, at Camden, and near Woodbury. Composition and formation Amber is heterogeneous in composition, but consists of several resinous bodies more or less soluble in alcohol, ether and chloroform, associated with an insoluble bituminous substance. Amber is a macromolecule by free radical polymerization of several precursors in the labdane family, e.g. communic acid, cummunol, and biformene. These labdanes are diterpenes (C20H32) and trienes, equipping the organic skeleton with three alkene groups for polymerization. As amber matures over the years, more polymerization takes place as well as isomerization reactions, crosslinking and cyclization. Most amber has a hardness between 2.0 and 2.5 on the Mohs scale, a refractive index of 1.5–1.6, a specific gravity between 1.06 and 1.10, and a melting point of 250–300 °C. Heated above , amber decomposes, yielding an oil of amber, and leaves a black residue which is known as "amber colophony", or "amber pitch"; when dissolved in oil of turpentine or in linseed oil this forms "amber varnish" or "amber lac". Molecular polymerization, resulting from high pressures and temperatures produced by overlying sediment, transforms the resin first into copal. Sustained heat and pressure drives off terpenes and results in the formation of amber. For this to happen, the resin must be resistant to decay. Many trees produce resin, but in the majority of cases this deposit is broken down by physical and biological processes. Exposure to sunlight, rain, microorganisms, and extreme temperatures tends to disintegrate the resin. For the resin to survive long enough to become amber, it must be resistant to such forces or be produced under conditions that exclude them. Fossil resins from Europe fall into two categories, the Baltic ambers and another that resembles the Agathis group. Fossil resins from the Americas and Africa are closely related to the modern genus Hymenaea, while Baltic ambers are thought to be fossil resins from plants of the family Sciadopityaceae that once lived in north Europe. The abnormal development of resin in living trees (succinosis) can result in the formation of amber. Impurities are quite often present, especially when the resin has dropped onto the ground, so the material may be useless except for varnish-making. Such impure amber is called firniss. Such inclusion of other substances can cause the amber to have an unexpected color. Pyrites may give a bluish color. Bony amber owes its cloudy opacity to numerous tiny bubbles inside the resin. However, so-called black amber is really a kind of jet. In darkly clouded and even opaque amber, inclusions can be imaged using high-energy, high-contrast, high-resolution X-rays. Extraction and processing Distribution and mining Amber is globally distributed, mainly in rocks of Cretaceous age or younger. Historically, the coast west of Königsberg in Prussia was the world's leading source of amber. The first mentions of amber deposits there date back to the 12th century. About 90% of the world's extractable amber is still located in that area, which was annexed by the Russian Soviet Federative Socialist Republic of the USSR in 1946, becoming the Kaliningrad Oblast. Pieces of amber torn from the seafloor are cast up by the waves and collected by hand, dredging, or diving. Elsewhere, amber is mined, both in open works and underground galleries. Then nodules of blue earth have to be removed and an opaque crust must be cleaned off, which can be done in revolving barrels containing sand and water. Erosion removes this crust from sea-worn amber. Dominican amber is mined through bell pitting, which is dangerous because of the risk of tunnel collapse. An important source of amber is Kachin State in northern Myanmar, which has been a major source of amber in China for at least 1,800 years. Contemporary mining of this deposit has attracted attention for unsafe working conditions and its role in funding internal conflict in the country. Amber from the Rivne Oblast of Ukraine, referred to as Rovno amber, is mined illegally by organised crime groups, who deforest the surrounding areas and pump water into the sediments to extract the amber, causing severe environmental deterioration. Treatment The Vienna amber factories, which use pale amber to manufacture pipes and other smoking tools, turn it on a lathe and polish it with whitening and water or with rotten stone and oil. The final luster is given by polishing with flannel. When gradually heated in an oil bath, amber "becomes soft and flexible. Two pieces of amber may be united by smearing the surfaces with linseed oil, heating them, and then pressing them together while hot. Cloudy amber may be clarified in an oil bath, as the oil fills the numerous pores that cause the turbidity. Small fragments, formerly thrown away or used only for varnish are now used on a large scale in the formation of "ambroid" or "pressed amber". The pieces are carefully heated with exclusion of air and then compressed into a uniform mass by intense hydraulic pressure, the softened amber being forced through holes in a metal plate. The product is extensively used for the production of cheap jewelry and articles for smoking. This pressed amber yields brilliant interference colors in polarized light." Amber has often been imitated by other resins like copal and kauri gum, as well as by celluloid and even glass. Baltic amber is sometimes colored artificially but also called "true amber". Appearance Amber occurs in a range of different colors. As well as the usual yellow-orange-brown that is associated with the color "amber", amber can range from a whitish color through a pale lemon yellow, to brown and almost black. Other uncommon colors include red amber (sometimes known as "cherry amber"), green amber, and even blue amber, which is rare and highly sought after. Yellow amber is a hard fossil resin from evergreen trees, and despite the name it can be translucent, yellow, orange, or brown colored. Known to the Iranians by the Pahlavi compound word kah-ruba (from kah "straw" plus rubay "attract, snatch", referring to its electrical properties), which entered Arabic as kahraba' or kahraba (which later became the Arabic word for electricity, كهرباء kahrabā), it too was called amber in Europe (Old French and Middle English ambre). Found along the southern shore of the Baltic Sea, yellow amber reached the Middle East and western Europe via trade. Its coastal acquisition may have been one reason yellow amber came to be designated by the same term as ambergris. Moreover, like ambergris, the resin could be burned as an incense. The resin's most popular use was, however, for ornamentation—easily cut and polished, it could be transformed into beautiful jewelry. Much of the most highly prized amber is transparent, in contrast to the very common cloudy amber and opaque amber. Opaque amber contains numerous minute bubbles. This kind of amber is known as "bony amber". Although all Dominican amber is fluorescent, the rarest Dominican amber is blue amber. It turns blue in natural sunlight and any other partially or wholly ultraviolet light source. In long-wave UV light it has a very strong reflection, almost white. Only about is found per year, which makes it valuable and expensive. Sometimes amber retains the form of drops and stalactites, just as it exuded from the ducts and receptacles of the injured trees. It is thought that, in addition to exuding onto the surface of the tree, amber resin also originally flowed into hollow cavities or cracks within trees, thereby leading to the development of large lumps of amber of irregular form. Classification Amber can be classified into several forms. Most fundamentally, there are two types of plant resin with the potential for fossilization. Terpenoids, produced by conifers and angiosperms, consist of ring structures formed of isoprene (C5H8) units. Phenolic resins are today only produced by angiosperms, and tend to serve functional uses. The extinct medullosans produced a third type of resin, which is often found as amber within their veins. The composition of resins is highly variable; each species produces a unique blend of chemicals which can be identified by the use of pyrolysis–gas chromatography–mass spectrometry. The overall chemical and structural composition is used to divide ambers into five classes. There is also a separate classification of amber gemstones, according to the way of production. Class I This class is by far the most abundant. It comprises labdatriene carboxylic acids such as communic or ozic acids. It is further split into three sub-classes. Classes Ia and Ib utilize regular labdanoid diterpenes (e.g. communic acid, communol, biformenes), while Ic uses enantio labdanoids (ozic acid, ozol, enantio biformenes). Class Ia includes Succinite (= 'normal' Baltic amber) and Glessite. They have a communic acid base, and they also include much succinic acid. Baltic amber yields on dry distillation succinic acid, the proportion varying from about 3% to 8%, and being greatest in the pale opaque or bony varieties. The aromatic and irritating fumes emitted by burning amber are mainly from this acid. Baltic amber is distinguished by its yield of succinic acid, hence the name succinite. Succinite has a hardness between 2 and 3, which is greater than many other fossil resins. Its specific gravity varies from 1.05 to 1.10. It can be distinguished from other ambers via infrared spectroscopy through a specific carbonyl absorption peak. Infrared spectroscopy can detect the relative age of an amber sample. Succinic acid may not be an original component of amber but rather a degradation product of abietic acid. Class Ib ambers are based on communic acid; however, they lack succinic acid. Class Ic is mainly based on enantio-labdatrienonic acids, such as ozic and zanzibaric acids. Its most familiar representative is Dominican amber,. which is mostly transparent and often contains a higher number of fossil inclusions. This has enabled the detailed reconstruction of the ecosystem of a long-vanished tropical forest. Resin from the extinct species Hymenaea protera is the source of Dominican amber and probably of most amber found in the tropics. It is not "succinite" but "retinite". Class II These ambers are formed from resins with a sesquiterpenoid base, such as cadinene. Class III These ambers are polystyrenes. Class IV Class IV is something of a catch-all: its ambers are not polymerized, but mainly consist of cedrene-based sesquiterpenoids. Class V Class V resins are considered to be produced by a pine or pine relative. They comprise a mixture of diterpinoid resins and n-alkyl compounds. Their main variety is Highgate copalite. Geological record The oldest amber recovered dates to the late Carboniferous period (). Its chemical composition makes it difficult to match the amber to its producers – it is most similar to the resins produced by flowering plants; however, there are no flowering plant fossils known from before the Cretaceous, and they were not common until the Late Cretaceous. Amber becomes abundant long after the Carboniferous, in the Early Cretaceous, , when it is found in association with insects. The oldest amber with arthropod inclusions comes from the Late Triassic (late Carnian 230 Ma) of Italy, where four microscopic (0.2–0.1 mm) mites, Triasacarus, Ampezzoa, Minyacarus and Cheirolepidoptus, and a poorly preserved nematoceran fly were found in millimetre-sized droplets of amber. The oldest amber with significant numbers of arthropod inclusions comes from Lebanon. This amber, referred to as Lebanese amber, is roughly 125–135 million years old, is considered of high scientific value, providing evidence of some of the oldest sampled ecosystems. In Lebanon, more than 450 outcrops of Lower Cretaceous amber were discovered by Dany Azar, a Lebanese paleontologist and entomologist. Among these outcrops, 20 have yielded biological inclusions comprising the oldest representatives of several recent families of terrestrial arthropods. Even older Jurassic amber has been found recently in Lebanon as well. Many remarkable insects and spiders were recently discovered in the amber of Jordan including the oldest zorapterans, clerid beetles, umenocoleid roaches, and achiliid planthoppers. Burmese amber from the Hukawng Valley in northern Myanmar is the only commercially exploited Cretaceous amber. Uranium–lead dating of zircon crystals associated with the deposit have given an estimated depositional age of approximately 99 million years ago. Over 1,300 species have been described from the amber, with over 300 in 2019 alone. Baltic amber is found as irregular nodules in marine glauconitic sand, known as blue earth, occurring in Upper Eocene strata of Sambia in Prussia. It appears to have been partly derived from older Eocene deposits and it occurs also as a derivative phase in later formations, such as glacial drift. Relics of an abundant flora occur as inclusions trapped within the amber while the resin was yet fresh, suggesting relations with the flora of eastern Asia and the southern part of North America. Heinrich Göppert named the common amber-yielding pine of the Baltic forests Pinites succiniter, but as the wood does not seem to differ from that of the existing genus it has been also called Pinus succinifera. It is improbable that the production of amber was limited to a single species; and indeed a large number of conifers belonging to different genera are represented in the amber-flora. Paleontological significance Amber is a unique preservational mode, preserving otherwise unfossilizable parts of organisms; as such it is helpful in the reconstruction of ecosystems as well as organisms; the chemical composition of the resin, however, is of limited utility in reconstructing the phylogenetic affinity of the resin producer.Amber sometimes contains animals or plant matter that became caught in the resin as it was secreted. Insects, spiders and even their webs, annelids, frogs, crustaceans, bacteria and amoebae, marine microfossils, wood, flowers and fruit, hair, feathers and other small organisms have been recovered in Cretaceous ambers (deposited c. ). The preservation of prehistoric organisms in amber forms a key plot point in Michael Crichton's 1990 novel Jurassic Park and the 1993 movie adaptation by Steven Spielberg. In the story, scientists are able to extract the preserved blood of dinosaurs from prehistoric mosquitoes trapped in amber, from which they genetically clone living dinosaurs. Scientifically this is as yet impossible, since no amber with fossilized mosquitoes has ever yielded preserved blood. Amber is, however, conducive to preserving DNA, since it dehydrates and thus stabilizes organisms trapped inside. One projection in 1999 estimated that DNA trapped in amber could last up to 100 million years, far beyond most estimates of around 1 million years in the most ideal conditions, although a later 2013 study was unable to extract DNA from insects trapped in much more recent Holocene copal. In 1938, 12-year-old David Attenborough (brother of Richard who played John Hammond in Jurassic Park) was given a piece of amber containing prehistoric creatures from his adoptive sister; it would be the focus of his 2004 BBC documentary The Amber Time Machine. Use Amber has been used since prehistory (Solutrean) in the manufacture of jewelry and ornaments, and also in folk medicine. Jewelry Amber has been used as jewelry since the Stone Age, from 13,000 years ago. Amber ornaments have been found in Mycenaean tombs and elsewhere across Europe.<ref>[http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8456512 Curt W. Beck, Anthony Harding and Helen Hughes-Brock, "Amber in the Mycenaean World" The Annual of the British School at Athens, vol. 69 (November 1974), pp. 145-172. DOI:10.1017/S0068245400005505] </ref> To this day it is used in the manufacture of smoking and glassblowing mouthpieces. Amber's place in culture and tradition lends it a tourism value; Palanga Amber Museum is dedicated to the fossilized resin. Historical medicinal uses Amber has long been used in folk medicine for its purported healing properties. Amber and extracts were used from the time of Hippocrates in ancient Greece for a wide variety of treatments through the Middle Ages and up until the early twentieth century. Traditional Chinese medicine uses amber to "tranquilize the mind". Amber necklaces are a traditional European remedy for colic or teething pain with purported analgesic properties of succinic acid, although there is no evidence that this is an effective remedy or delivery method. The American Academy of Pediatrics and the FDA have warned strongly against their use, as they present both a choking and a strangulation hazard. Scent of amber and amber perfumery In ancient China, it was customary to burn amber during large festivities. If amber is heated under the right conditions, oil of amber is produced, and in past times this was combined carefully with nitric acid to create "artificial musk" – a resin with a peculiar musky odor. Although when burned, amber does give off a characteristic "pinewood" fragrance, modern products, such as perfume, do not normally use actual amber because fossilized amber produces very little scent. In perfumery, scents referred to as "amber" are often created and patentedPerfume compositions and perfume articles containing one isomer of an octahydrotetramethyl acetonaphthone, John B. Hall, Rumson; James Milton Sanders, Eatontown , Publication Date: 30 December 1975 to emulate the opulent golden warmth of the fossil. The scent of amber was originally derived from emulating the scent of ambergris and/or the plant resin labdanum, but since sperm whales are endangered, the scent of amber is now largely derived from labdanum. The term "amber" is loosely used to describe a scent that is warm, musky, rich and honey-like, and also somewhat earthy. Benzoin is usually part of the recipe. Vanilla and cloves are sometimes used to enhance the aroma. "Amber" perfumes may be created using combinations of labdanum, benzoin resin, copal (a type of tree resin used in incense manufacture), vanilla, Dammara resin and/or synthetic materials. In Arab Muslim tradition, popular scents include amber, jasmine, musk and oud (agarwood). Imitation substances Young resins used as imitations: Kauri resin from Agathis australis trees in New Zealand. The copals (subfossil resins). The African and American (Colombia) copals from Leguminosae trees family (genus Hymenaea). Amber of the Dominican or Mexican type (Class I of fossil resins). Copals from Manilia (Indonesia) and from New Zealand from trees of the genus Agathis'' (family Araucariaceae) Other fossil resins: burmite in Burma, rumenite in Romania, and simetite in Sicily. Other natural resins — cellulose or chitin, etc. Plastics used as imitations: Stained glass (inorganic material) and other ceramic materials Celluloid Cellulose nitrate (first obtained in 1833) — a product of treatment of cellulose with nitration mixture. Acetylcellulose (not in the use at present) Galalith or "artificial horn" (condensation product of casein and formaldehyde), other trade names: Alladinite, Erinoid, Lactoid. Casein — a conjugated protein forming from the casein precursor – caseinogen. Resolane (phenolic resins or phenoplasts, not in the use at present) Bakelite resine (resol, phenolic resins), product from Africa are known under the misleading name "African amber". Carbamide resins — melamine, formaldehyde and urea-formaldehyde resins. Epoxy novolac (phenolic resins), unofficial name "antique amber", not in the use at present Polyesters (Polish amber imitation) with styrene. For example, unsaturated polyester resins (polymals) are produced by Chemical Industrial Works "Organika" in Sarzyna, Poland; estomal are produced by Laminopol firm. Polybern or sticked amber is artificial resins the curled chips are obtained, whereas in the case of amber – small scraps. "African amber" (polyester, synacryl is then probably other name of the same resine) are produced by Reichhold firm; Styresol trade mark or alkid resin (used in Russia, Reichhold, Inc. patent, 1948. Polyethylene Epoxy resins Polystyrene and polystyrene-like polymers (vinyl polymers). The resins of acrylic type (vinyl polymers), especially polymethyl methacrylate PMMA (trade mark Plexiglass, metaplex). See also Ammolite List of types of amber Petrified wood Pearl Poly(methyl methacrylate) Precious coral References Bibliography External links Farlang many full text historical references on Amber Theophrastus, George Frederick Kunz, and special on Baltic amber. IPS Publications on amber inclusions International Paleoentomological Society: Scientific Articles on amber and its inclusions Webmineral on Amber Physical properties and mineralogical information Mindat Amber Image and locality information on amber NY Times 40 million year old extinct bee in Dominican amber Fossil resins Amorphous solids Traditional medicine

1373

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

Amalaric

Amalaric (; Spanish and Portuguese: Amalarico; 502–531) was king of the Visigoths from 522 until his death in battle in 531. He was a son of king Alaric II and his first wife Theodegotha, daughter of Theoderic the Great. Biography When Alaric II was killed while fighting Clovis I, king of the Franks, in the Battle of Vouillé (507), his kingdom fell into disarray. "More serious than the destruction of the Gothic army," writes Herwig Wolfram, "than the loss of both Aquitanian provinces and the capital of Toulose, was the death of the king." Alaric had made no provision for a successor, and although he had two sons, one was of age but illegitimate and the other, Amalaric, the offspring of a legal marriage but still a child. Amalaric was carried for safety into Spain, which country and Provence were thenceforth ruled by his maternal grandfather, Theodoric the Great, acting through his vice-regent, an Ostrogothic nobleman named Theudis. The older son, Gesalec, was chosen as king but his reign was disastrous. King Theoderic of the Ostrogoths sent an army, led by his sword-bearer Theudis, against Gesalec, ostensibly on behalf of Amalaric; Gesalec fled to Africa. The Ostrogoths then drove back the Franks and their Burgundian allies, regaining possession of "the south of Novempopulana, Rodez, probably even Albi, and even Toulose". Following the 511 death of Clovis, Theoderic negotiated a peace with Clovis' successors, securing Visigothic control of the southernmost portion of Gaul for the rest of the existence of their kingdom. In 522, the young Amalaric was proclaimed king, and four years later, on Theoderic's death, he assumed full royal power, although relinquishing Provence to his cousin Athalaric. His kingdom was faced with a Frankish threat from the north; according to Peter Heather, this was his motivation for marrying Chrotilda, the daughter of Clovis. However, this was not successful, for according to Gregory of Tours, Amalaric pressured her to forsake Orthodoxy and convert to Arian Christianity, at one point beating her until she bled; she sent to her brother Childebert I, king of Paris, a towel stained with her own blood. It is worth noting Ian Wood's advice that although Gregory provides the fullest information for this period, where it touches Merovingian affairs, he often "allowed his religious bias to determine his interpretation of the events." Peter Heather agrees with Wood's implication in this instance: "I doubt that this is the full story, but the effects of Frankish intervention are clear enough." Childebert defeated the Visigothic army and took Narbonne. Amalaric fled south to Barcelona, where according to Isidore of Seville, he was assassinated by his own men. According to Peter Heather, Theoderic's former governor Theudis was implicated in Amalaric's murder, "and was certainly its prime beneficiary." As for Chrotilda, in Gregory's words, she died on the journey home "by some ill chance". Childebert had her body brought to Paris where she was buried alongside her father Clovis. External Links Notes Further reading Edward Gibbon, History of the Decline and Fall of the Roman Empire, Chapter 39 531 deaths Balt dynasty Assassinated Gothic people 6th-century murdered monarchs 6th-century Visigothic monarchs Year of birth unknown

1374

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

Alphorn

The alphorn or alpenhorn or alpine horn is a labrophone, consisting of a straight several-meter-long wooden natural horn of conical bore, with a wooden cup-shaped mouthpiece. Traditionally the Alphorn was made of one single piece, or two parts at most, and made from the wood of a red pine tree. Sometimes the trees would bend from the weight of snow during the wintertime, and this caused them to have the larger and bent mouthpiece at their ends. Modern Alphorns are sometimes made from three distinct parts that can be stuck together, this is to make them easier to transport via automobile, or even carried by hand, and today are more frequently made from the wood of a spruce tree or fir tree. It is used by mountain dwellers in the Swiss Alps. Similar wooden horns were used for communication in most mountainous regions of Europe, from the Alps to the Carpathians. Alphorns are today used as musical instruments. History For a long time, scholars believed that the alphorn had been derived from the Roman-Etruscan lituus, because of their resemblance in shape, and because of the word liti, meaning Alphorn in the dialect of Obwalden. There is no documented evidence for this theory however, and also the word liti was probably borrowed from 16th–18th century writings in Latin, where the word lituus could describe various wind instruments, such as the horn, the crumhorn, or the cornett. Swiss naturalist Conrad Gesner used the words lituum alpinum for the first known detailed description of the alphorn in his De raris et admirandis herbis in 1555. The oldest known document using the German word Alphorn is a page from a 1527 account book from the former Cistercian abbey St. Urban near Pfaffnau mentioning the payment of two Batzen for an itinerant alphorn player from the Valais. 17th–19th century collections of alpine myths and legends suggest that alphorn-like instruments had frequently been used as signal instruments in village communities since old times or earlier, sometimes substituting for the lack of church bells. Surviving artifacts, dating back to as far as ca. AD 1400, include wooden labrophones in their stretched form, like the alphorn, or coiled versions, such as the "Büchel" and the "Allgäuisches Waldhorn" or "Ackerhorn". The alphorn's exact origins remain indeterminate, and the ubiquity of horn-like signal instruments in valleys throughout Europe may indicate a long history of cross influences regarding their construction and usage. Construction and qualities The alphorn is carved from solid softwood, generally spruce but sometimes pine. In former times, the alphorn maker would find a tree bent at the base in the shape of an alphorn, but modern makers piece the wood together at the base. A cup-shaped mouthpiece carved out of a block of hard wood is added and the instrument is complete. An alphorn made at Rigi-Kulm, Schwyz, and now in the Victoria and Albert Museum, measures in length and has a straight tube. The Swiss alphorn varies in shape according to the locality, being curved near the bell in the Bernese Oberland. Michael Praetorius mentions an alphorn-like instrument under the name of Hölzern Trummet (wooden trumpet) in Syntagma Musicum (Wittenberg, 1615–1619; Pl. VIII). The alphorn has no lateral openings and therefore gives the pure natural harmonic series of the open pipe. The notes of the natural harmonic series overlap, but do not exactly correspond, to notes found in the familiar chromatic scale in standard Western equal temperament. Most prominently within the alphorn's range, the 7th and 11th harmonics are particularly noticeable, because they fall between adjacent notes in the chromatic scale. Accomplished alphornists often command a range of nearly three octaves, consisting of the 2nd through the 16th notes of the harmonic series. The availability of the higher tones is due in part to the relatively small diameter of the bore of the mouthpiece and tubing in relation to the overall length of the horn. The well-known "Ranz des Vaches" (score; audio) is a traditional Swiss melody often heard on the alphorn. The song describes the time of bringing the cows to the high country at milk making time. Rossini introduced the "Ranz des Vaches" into his masterpiece William Tell, along with many other delightful melodies scattered throughout the opera in vocal and instrumental parts that are well-suited to the alphorn. Brahms wrote to Clara Schumann that the inspiration for the dramatic entry of the horn in the introduction to the last movement of his First Symphony was an alphorn melody he heard while vacationing in the Rigi area of Switzerland. For Clara's birthday in 1868 Brahms sent her a greeting that was to be sung with the melody. Music for alphorn Among music composed for the alphorn: Concerto Grosso No. 1 (2013) for four alphorns and orchestra by Georg Friedrich Haas Sinfonia pastorale for corno pastoriccio in G (alphorn) and string orchestra (1755) by Leopold Mozart Concerto for alphorn and orchestra (1970) by Jean Daetwyler Concerto No. 2 for alphorn (with flute, string orchestra and percussion) (1983) by Daetwyler Dialogue with Nature for alphorn, flute, and orchestra by Daetwyler Super Alpen King for three alphorns and orchestra by Ghislain Muller (2001) VSP orkestra / Arkady Shilkloper, Renaud Leipp Concertino rustico (1977) by Ferenc Farkas Begegnung for three alphorns and concert band, by Kurt Gable. Säumerweg-Blues (audio played by Kurt Ott) among many compositions by Hans-Jürg Sommer, Alphorn Musik Messe for alphorn and choir by Franz Schüssele Alphorn-Center Erbauliche Studie für 12 Alphörner in Abwesenheit von Bergen by Mathias Rüegg (1998) Wolf Music: Tapio for alphorn and echoing instruments (2003) by R. Murray Schafer Le Berger fantaisiste for three alphorns and orchestra by Ghislain Muller, Arkady Shilkloper, Renaud Leipp, Serge Haessler, VSP orkestra (2001) Bob Downes & The Alphorn Brothers (2015) by Bob Downes Open Music (CD rec. 2004) Concerto for alphorn in F and orchestra by Daniel Schnyder (2004) Matterhorn (a prelude for alphorn and wind orchestra) by Robert Litton (2013) Alpine Trail for alphorn and orchestra by Arkady Shilkloper Lai nair for alphorn and contrabass by John Wolf Brennan (2015) Der Bergschuh for alphorn and marching band by Daniel Schnyder Crested Butte Mountain for alphorn and wind band (or brass sextet, strings, or horn septet) by Arkady Shilkloper Robin for alphorn and wind band (big band) by Arkady Shilkloper Fanfare for four alphorns by Arkady Shilkloper In popular culture The alphorn is prominently featured in advertisements for Ricola cough drops, which are manufactured in Laufen, Switzerland Brief scene in Rammstein's "Dicke Titten". See also Bucium, a type of alphorn used by mountain dwellers in Romania Didgeridoo, an instrument of Aboriginal Australian origins, traditionally made from a hollowed out eucalyptus tree trunk Erke, a similar instrument of Argentine Northwest Kuhreihen, a type of melody played on an alphorn Tiba, wind instrument made of wood or metal that originates in the Grisons canton; it was used by shepherds on alpine meadows in the Alps Tibetan horn, long trumpet or horn used in Tibetan Buddhist and Mongolian buddhist ceremonies Trembita, a Ukrainian alpine horn made of wood Trutruca, wind instrument played mainly amongst the Mapuche people of Chile and Argentina; produces a sound that is loud and severe, with few tonal variations References Further reading Bachmann-Geiser, Brigitte, Das Alphorn: Vom Lock- zum Rockinstrument. Paul Haupt, Berne, 1999. Franz Schüssele, Alphorn und Hirtenhorn in Europa, book and CD with 63 sound samples available at Alphorn-Center, External links Third Annual North American Alphorn Retreat Alphorn in concert Concert and composition contest taking place annually in Oensingen, Canton Solothurn, Switzerland International Alphorn Festival at Nendaz, Canton Valais, Switzerland VSP orkestra & Arkady Shilkloper alphorn jazz & improvisations, composer / arranger : Ghislain Muller, Arkady Shilkloper, Pascal Beck National symbols of Switzerland Swiss musical instruments Natural horns and trumpets

1376

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

Army

An army, ground force or land force is a fighting force that fights primarily on land. In the broadest sense, it is the land-based military branch, service branch or armed service of a nation or country. It may also include aviation assets by possessing an army aviation component. Within a national military force, the word army may also mean a field army. In some countries, such as France and China, the term "army", especially in its plural form "armies", has the broader meaning of armed forces as a whole, while retaining the colloquial sense of land forces. To differentiate the colloquial army from the formal concept of military force, the term is qualified, for example in France the land force is called Armée de terre, meaning Land Army, and the air and space force is called Armée de l'Air et de l’Espace, meaning Air and Space Army. The naval force, although not using the term "army", is also included in the broad sense of the term "armies" — thus the French Navy is an integral component of the collective French Armies (French Armed Forces) under the Ministry of the Armies. A similar pattern is seen in China, with the People's Liberation Army (PLA) being the overall military, the land force being the PLA Ground Force, and so forth for the PLA Air Force, the PLA Navy, and other branches. By convention, irregular military is understood in contrast to regular armies which grew slowly from personal bodyguards or elite militia. Regular in this case refers to standardized doctrines, uniforms, organizations, etc. Regular military can also refer to full-time status (standing army), versus reserve or part-time personnel. Other distinctions may separate statutory forces (established under laws such as the National Defence Act), from de facto "non-statutory" forces such as some guerrilla and revolutionary armies. Armies may also be expeditionary (designed for overseas or international deployment) or fencible (designed for – or restricted to – homeland defence). Structure Armies are always divided into various specialties, according to the mission, role, and training of individual units, and sometimes individual soldiers within a unit. Some of the groupings common to all armies include the following: Infantry Armoured forces Artillery Signal corps Military police Medical corps History India India's armies were among the first in the world. In the first recorded battle, the Battle of the Ten Kings, a Hindu Aryan king named Sudas defeated an alliance of ten kings and their supportive chieftains. During the Iron Age, the Maurya and Nanda Empires had the largest armies in the world, the peak being approximately over 600,000 Infantry, 30,000 Cavalry, 8,000 War-Chariots and 9,000 War Elephants not including tributary state allies. In the Gupta age, large armies of longbowmen were recruited to fight off invading horse archer armies. Elephants, pikemen and cavalry were other featured troops. In Rajput times, the main piece of equipment was iron or chain-mail armor, a round shield, either a curved blade or a straight sword, a chakra disc, and a katar dagger. China The states of China raised armies for at least 1000 years before the Spring and Autumn Annals. By the Warring States period, the crossbow had been perfected enough to become a military secret, with bronze bolts that could pierce any armor. Thus any political power of a state rested on the armies and their organization. China underwent political consolidation of the states of Han (韓), Wei (魏), Chu (楚), Yan (燕), Zhao (趙) and Qi (齊), until by 221 BCE, Qin Shi Huang (秦始皇帝), the first emperor of the Qin dynasty, attained absolute power. This first emperor of China could command the creation of a Terracotta Army to guard his tomb in the city of Xi'an (西安), as well as a realignment of the Great Wall of China to strengthen his empire against insurrection, invasion and incursion. Sun Tzu's The Art of War remains one of China's Seven Military Classics, even though it is two thousand years old. Since no political figure could exist without an army, measures were taken to ensure only the most capable leaders could control the armies. Civil bureaucracies (士大夫) arose to control the productive power of the states, and their military power. Sparta The Spartan Army was one of the earliest known professional armies. Boys were sent to a barracks at the age of seven or eight to train for becoming a soldier. At the age of thirty, they were released from the barracks and allowed to marry and have a family. After that, men devoted their lives to war until their retirement at the age of 60. The Spartan Army was largely composed of hoplites, equipped with arms and armor nearly identical to each other. Each hoplite bore the Spartan emblem and a scarlet uniform. The main pieces of this armor were a round shield, a spear and a helmet. Ancient Rome The Roman Army had its origins in the citizen army of the Republic, which was staffed by citizens serving mandatory duty for Rome. Reforms turned the army into a professional organization which was still largely filled by citizens, but these citizens served continuously for 25 years before being discharged. The Romans were also noted for making use of auxiliary troops, non-Romans who served with the legions and filled roles that the traditional Roman military could not fill effectively, such as light skirmish troops and heavy cavalry. After their service in the army they were made citizens of Rome and then their children were citizens also. They were also given land and money to settle in Rome. In the Late Roman Empire, these auxiliary troops, along with foreign mercenaries, became the core of the Roman Army; moreover, by the time of the Late Roman Empire tribes such as the Visigoths were paid to serve as mercenaries. Medieval Europe In the earliest Middle Ages it was the obligation of every aristocrat to respond to the call to battle with his own equipment, archers, and infantry. This decentralized system was necessary due to the social order of the time, but could lead to motley forces with variable training, equipment and abilities. The more resources the noble had access to, the better his troops would be. Initially, the words "knight" and "noble" were used interchangeably as there was not generally a distinction between them. While the nobility did fight upon horseback, they were also supported by lower class citizens – and mercenaries and criminals – whose only purpose was participating in warfare because, most often than not, they held brief employment during their lord's engagement. As the Middle Ages progressed and feudalism developed in a legitimate social and economic system, knights started to develop into their own class with a minor caveat: they were still in debt to their lord. No longer primarily driven by economic need, the newly established vassal class were, instead, driven by fealty and chivalry. As central governments grew in power, a return to the citizen armies of the classical period also began, as central levies of the peasantry began to be the central recruiting tool. England was one of the most centralized states in the Middle Ages, and the armies that fought in the Hundred Years' War were, predominantly, composed of paid professionals. In theory, every Englishman had an obligation to serve for forty days. Forty days was not long enough for a campaign, especially one on the continent. Thus the scutage was introduced, whereby most Englishmen paid to escape their service and this money was used to create a permanent army. However, almost all high medieval armies in Europe were composed of a great deal of paid core troops, and there was a large mercenary market in Europe from at least the early 12th century. As the Middle Ages progressed in Italy, Italian cities began to rely mostly on mercenaries to do their fighting rather than the militias that had dominated the early and high medieval period in this region. These would be groups of career soldiers who would be paid a set rate. Mercenaries tended to be effective soldiers, especially in combination with standing forces, but in Italy they came to dominate the armies of the city states. This made them considerably less reliable than a standing army. Mercenary-on-mercenary warfare in Italy also led to relatively bloodless campaigns which relied as much on maneuver as on battles. In 1439 the French legislature, known as the Estates General (French: états généraux), passed laws that restricted military recruitment and training to the king alone. There was a new tax to be raised known as the taille that was to provide funding for a new Royal army. The mercenary companies were given a choice of either joining the Royal army as compagnies d'ordonnance on a permanent basis, or being hunted down and destroyed if they refused. France gained a total standing army of around 6,000 men, which was sent out to gradually eliminate the remaining mercenaries who insisted on operating on their own. The new standing army had a more disciplined and professional approach to warfare than its predecessors. The reforms of the 1440s, eventually led to the French victory at Castillon in 1453, and the conclusion of the Hundred Years' War. By 1450 the companies were divided into the field army, known as the grande ordonnance and the garrison force known as the petite ordonnance. Early modern First nation states lacked the funds needed to maintain standing forces, so they tended to hire mercenaries to serve in their armies during wartime. Such mercenaries typically formed at the ends of periods of conflict, when men-at-arms were no longer needed by their respective governments. The veteran soldiers thus looked for other forms of employment, often becoming mercenaries. Free Companies would often specialize in forms of combat that required longer periods of training that was not available in the form of a mobilized militia. As late as the 1650s, most troops were mercenaries. However, after the 17th century, most states invested in better disciplined and more politically reliable permanent troops. For a time mercenaries became important as trainers and administrators, but soon these tasks were also taken by the state. The massive size of these armies required a large supporting force of administrators. The newly centralized states were forced to set up vast organized bureaucracies to manage these armies, which some historians argue is the basis of the modern bureaucratic state. The combination of increased taxes and increased centralization of government functions caused a series of revolts across Europe such as the Fronde in France and the English Civil War. In many countries, the resolution of this conflict was the rise of absolute monarchy. Only in England and the Netherlands did representative government evolve as an alternative. From the late 17th century, states learned how to finance wars through long term low interest loans from national banking institutions. The first state to master this process was the Dutch Republic. This transformation in the armies of Europe had great social impact. The defense of the state now rested on the commoners, not on the aristocrats. However, aristocrats continued to monopolize the officer corps of almost all early modern armies, including their high command. Moreover, popular revolts almost always failed unless they had the support and patronage of the noble or gentry classes. The new armies, because of their vast expense, were also dependent on taxation and the commercial classes who also began to demand a greater role in society. The great commercial powers of the Dutch and English matched much larger states in military might. As any man could be quickly trained in the use of a musket, it became far easier to form massive armies. The inaccuracy of the weapons necessitated large groups of massed soldiers. This led to a rapid swelling of the size of armies. For the first time huge masses of the population could enter combat, rather than just the highly skilled professionals. It has been argued that the drawing of men from across the nation into an organized corps helped breed national unity and patriotism, and during this period the modern notion of the nation state was born. However, this would only become apparent after the French Revolutionary Wars. At this time, the levée en masse and conscription would become the defining paradigm of modern warfare. Before then, however, most national armies were in fact composed of many nationalities. In Spain armies were recruited from all the Spanish European territories including Spain, Italy, Wallonia (Walloon Guards) and Germany. The French recruited some soldiers from Germany, Switzerland as well as from Piedmont. Britain recruited Hessian and Hanovrian troops until the late 18th century. Irish Catholics made careers for themselves in the armies of many Catholic European states. Prior to the English Civil War in England, the monarch maintained a personal bodyguard of Yeomen of the Guard and the Honourable Corps of Gentlemen at Arms, or "gentlemen pensioners", and a few locally raised companies to garrison important places such as Berwick on Tweed or Portsmouth (or Calais before it was recaptured by France in 1558). Troops for foreign expeditions were raised upon an ad hoc basis. Noblemen and professional regular soldiers were commissioned by the monarch to supply troops, raising their quotas by indenture from a variety of sources. On January 26, 1661 Charles II issued the Royal Warrant that created the genesis of what would become the British Army, although the Scottish and English Armies would remain two separate organizations until the unification of England and Scotland in 1707. The small force was represented by only a few regiments. After the American Revolutionary War the Continental Army was quickly disbanded as part of the Americans' distrust of standing armies, and irregular state militias became the sole ground army of the United States, with the exception of one battery of artillery guarding West Point's arsenal. Then First American Regiment was established in 1784. However, because of continuing conflict with Native Americans, it was soon realized that it was necessary to field a trained standing army. The first of these, the Legion of the United States, was established in 1791. Until 1733 the common soldiers of Prussian Army consisted largely of peasantry recruited or impressed from Brandenburg–Prussia, leading many to flee to neighboring countries. To halt this trend, Frederick William I divided Prussia into regimental cantons. Every youth was required to serve as a soldier in these recruitment districts for three months each year; this met agrarian needs and added extra troops to bolster the regular ranks. Russian tsars before Peter I of Russia maintained professional hereditary musketeer corps (streltsy in Russian) that were highly unreliable and undisciplined. In times of war the armed forces were augmented by peasants. Peter I introduced a modern regular army built on German model, but with a new aspect: officers not necessarily from nobility, as talented commoners were given promotions that eventually included a noble title at the attainment of an officer's rank. Conscription of peasants and townspeople was based on quota system, per settlement. Initially it was based on the number of households, later it was based on the population numbers. The term of service in the 18th century was for life. In 1793 it was reduced to 25 years. In 1834 it was reduced to 20 years plus 5 years in reserve and in 1855 to 12 years plus 3 years of reserve. The first Ottoman standing army were Janissaries. They replaced forces that mostly comprised tribal warriors (ghazis) whose loyalty and morale could not always be trusted. The first Janissary units were formed from prisoners of war and slaves, probably as a result of the sultan taking his traditional one-fifth share of his army's booty in kind rather than cash. From the 1380s onwards, their ranks were filled under the devşirme system, where feudal dues were paid by service to the sultan. The "recruits" were mostly Christian youths, reminiscent of mamluks. China organized the Manchu people into the Eight Banner system in the early 17th century. Defected Ming armies formed the Green Standard Army. These troops enlisted voluntarily and for long terms of service. Late modern Conscription allowed the French Republic to form the Grande Armée, what Napoleon Bonaparte called "the nation in arms", which successfully battled European professional armies. Conscription, particularly when the conscripts are being sent to foreign wars that do not directly affect the security of the nation, has historically been highly politically contentious in democracies. In developed nations, the increasing emphasis on technological firepower and better-trained fighting forces, make mass conscription unlikely in the foreseeable future. Russia, as well as many other nations, retains mainly a conscript army. There is also a very rare citizen army as used in Switzerland (see Military of Switzerland). Field army A particular army can be named or numbered to distinguish it from military land forces in general. For example, the First United States Army and the Army of Northern Virginia. In the British Army it is normal to spell out the ordinal number of an army (e.g. First Army), whereas lower formations use figures (e.g. 1st Division). Armies (as well as army groups and theaters) are large formations which vary significantly between armed forces in size, composition, and scope of responsibility. In the Soviet Red Army and the Soviet Air Force, "Armies" could vary in size, but were subordinate to an Army Group-sized "front" in wartime. In peacetime, a Soviet army was usually subordinate to a military district. Viktor Suvorov's Inside the Soviet Army describes how Cold War era Soviet military districts were actually composed of a front headquarters and a military district headquarters co-located for administration and deception ('maskirovika') reasons. Formations In many countries, especially in Europe or North America, armies are often subdivided as follows: See also List of armies List of armies by country List of numbered armies List of countries by number of military and paramilitary personnel Military organization Paramilitary References External links Types of military forces

1380

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

Alligatoridae

The family Alligatoridae of crocodylians includes alligators, caimans and their extinct relatives. Phylogeny The superfamily Alligatoroidea includes all crocodilians (fossil and extant) that are more closely related to the American alligator than to either the Nile crocodile or the gharial. This is a stem-based definition for alligators, and is more inclusive than the crown group Alligatoridae. As a crown group, Alligatoridae only includes the last common ancestor of all extant (living) alligators, caimans, and their descendants (living or extinct), whereas Alligatoroidea, as a stem-based group, also includes more basal extinct alligator ancestors that are more closely related to living alligators than to crocodiles or gavialids. When considering only living taxa (neontology), this makes Alligatoroidea and Alligatoridae redundant. The simplified cladogram below shows Alligatoridae's relationships to other extant (living) crocodilians. The below detailed cladogram shows one proposal for the internal relationships within Alligatoridae (although the exact alligatoroid phylogeny is still disputed). Evolution The superfamily Alligatoroidea is thought to have split from the crocodile-gharial lineage in the late Cretaceous, about 87 million years ago. Leidyosuchus of Alberta is the earliest known genus. Fossil alligatoroids have been found throughout Eurasia as land bridges across both the North Atlantic and the Bering Strait have connected North America to Eurasia during the Cretaceous, Paleogene, and Neogene periods. Alligators and caimans split in North America during the early Tertiary or late Cretaceous (about 53 million to about 65 million years ago) and the latter reached South America by the Paleogene, before the closure of the Isthmus of Panama during the Neogene period. The Chinese alligator split from the American alligator about 33 million years ago and likely descended from a lineage that crossed the Bering land bridge during the Neogene. The modern American alligator is well represented in the fossil record of the Pleistocene. The alligator's full mitochondrial genome was sequenced in the 1990s. The full genome, published in 2014, suggests that the alligator evolved much more slowly than mammals and birds. True alligators The lineage including alligators proper (Alligatorinae) occurs in the fluvial deposits of the age of the Upper Chalk in Europe, where they did not die out until the Pliocene age. The true alligators are today represented by two species, A. mississippiensis in the southeastern United States, which can grow to 15.6 ft (4.6 m) and weigh 1000 lbs(453 kg), with unverified sizes of up to 19.2 ft(5.9 m). And the small A. sinensis in the Yangtze River, China, which grows to an average of 5 ft (1.5 m). Their name derives from the Spanish el lagarto, which means "the lizard". Caimans In Central and South America, the alligator family is represented by six species of the subfamily Caimaninae, which differ from the alligator by the absence of a bony septum between the nostrils, and having ventral armour composed of overlapping bony scutes, each of which is formed of two parts united by a suture. Besides the three species in Caiman, the smooth-fronted caimans in genus Paleosuchus and the black caiman in Melanosuchus are described. Caimans tend to be more agile and crocodile-like in their movements, and have longer, sharper teeth than alligators. C. crocodilus, the spectacled caiman, has the widest distribution, from southern Mexico to the northern half of Argentina, and grows to a modest size of about . The largest is the near-threatened Melanosuchus niger, the jacaré-açu or large or black caiman of the Amazon River basin. Black caimans grow to , with the unverified size of up to . The black caiman and American alligator are the only members of the alligator family that pose the same danger to humans as the larger species of the crocodile family. Although caimans have not been studied in depth, scientists have learned their mating cycles (previously thought to be spontaneous or year-round) are linked to the rainfall cycles and the river levels, which increases chances of survival for their offspring. Taxonomy † = extinct Family Alligatoridae Subfamily Alligatorinae Genus Alligator † Alligator hailensis † Alligator mcgrewi † Alligator mefferdi Alligator mississippiensis, American alligator † Alligator olseni † Alligator prenasalis Alligator sinensis, Chinese alligator † Alligator thomsoni Genus † Allognathosuchus Genus † Arambourgia Genus † Ceratosuchus Genus † Chrysochampsa Genus † Eoalligator Genus † Hassiacosuchus Genus † Krabisuchus Genus † Navajosuchus? Genus † Procaimanoidea Genus † Wannaganosuchus Subfamily Caimaninae Genus † Acresuchus Genus † Bottosaurus Genus Caiman † Caiman brevirostris Caiman crocodilus, Spectacled caiman Caiman latirostris, Broad-snouted caiman † Caiman lutescans † Caiman venezuelensis † Caiman wannlangstoni Caiman yacare, Yacare caiman Genus † Centenariosuchus Genus † Chinatichampsus Genus † Culebrasuchus Genus † Eocaiman Genus † Globidentosuchus Genus † Gnatusuchus Genus † Kuttanacaiman Genus Melanosuchus † Melanosuchus fisheri Melanosuchus niger, Black caiman Genus † Mourasuchus Genus † Necrosuchus Genus † Orthogenysuchus Genus Paleosuchus Paleosuchus palpebrosus, Cuvier's dwarf caiman Paleosuchus trigonatus, Smooth-fronted caiman Genus † Protocaiman Genus † Purussaurus Genus † Tsoabichi References External links "Crocodilians: Natural History & Conservation" crocodilian.com "Family Alligatoridae Gray 1844 (alligator)", fossilworks.org. Taxa named by John Edward Gray Reptile families Extant Campanian first appearances

1383

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

Alder

Alders are trees comprising the genus Alnus in the birch family Betulaceae. The genus comprises about 35 species of monoecious trees and shrubs, a few reaching a large size, distributed throughout the north temperate zone with a few species extending into Central America, as well as the northern and southern Andes. Description With a few exceptions, alders are deciduous, and the leaves are alternate, simple, and serrated. The flowers are catkins with elongate male catkins on the same plant as shorter female catkins, often before leaves appear; they are mainly wind-pollinated, but also visited by bees to a small extent. These trees differ from the birches (Betula, another genus in the family) in that the female catkins are woody and do not disintegrate at maturity, opening to release the seeds in a similar manner to many conifer cones. The largest species are red alder (A. rubra) on the west coast of North America, and black alder (A. glutinosa), native to most of Europe and widely introduced elsewhere, both reaching over . By contrast, the widespread Alnus alnobetula (green alder) is rarely more than a shrub. Taxonomy Classification The genus is divided into three subgenera: Subgenus Alnus Trees with stalked shoot buds, male and female catkins produced in autumn (fall) but stay closed over winter, pollinating in late winter or early spring, about 15–25 species, including: Alnus acuminata Kunth – Andean alder, aliso. Mexico, Central and South America. subsp. acuminata Kunth subsp. arguta (Schltdl.) Furlow subsp. glabrata (Fernald) Furlow Alnus cordata (Loisel.) Duby – Italian alder. Italy, Corsica. Alnus cremastogyne Burkill – China. Alnus firma Siebold & Zucc. – Kyūshū Island in Japan Alnus glutinosa (L.) Gaertn. – black alder. Europe, Central Asia. subsp. barbata (C.A.Mey.) Yalt. subsp. glutinosa (L.) Gaertn. subsp. incisa (Willd.) Regel subsp. laciniata (Willd.) Regel Alnus hirsuta (Spach) Rupr. – Manchurian alder. Japan, Korea, Manchuria, Siberia, Russian Far East Alnus incana (L.) Moench subsp. incana (L.) Moench – speckled alder or grey alder. Eurasia, North America subsp. kolaensis (Orlova) Á.Löve & D.Löve subsp. rugosa (Du Roi) R.T.Clausen subsp. tenuifolia (Nutt.) Breitung Alnus japonica (Thunb.) Steud. – Japanese alder, Japan, Korea, Taiwan, eastern China, Russian Far East Alnus jorullensis Kunth – Mexican alder. Mexico, Guatemala, Honduras. subsp. lutea Furlow subsp. jorullensis Kunth Alnus lusitanica Vít, Douda, & Mandák - Spain, Portugal, Morocco Alnus matsumurae Callier – Honshū Island in Japan Alnus nepalensis D.Don – Nepalese alder. Himalayas, Tibet, Yunnan, Nepal, Bhutan, Myanmar, Thailand. Alnus oblongifolia Torr. – Arizona alder. Arizona, New Mexico, Sonora, Chihuahua Alnus orientalis Decne. – Oriental alder. Southern Turkey, northwest Syria, Cyprus, Lebanon, Iran Alnus rhombifolia Nutt. – white alder. California, Nevada, Oregon, Washington, Idaho, Montana Alnus rohlenae Vít, Douda, & Mandák - Western Balkans Alnus rubra Bong. – red alder. Alaska, Yukon, British Columbia, California, Oregon, Washington, Idaho, Montana. Alnus serrulata (Aiton) Willd. – hazel alder, tag alder or smooth alder. Eastern North America Alnus subcordata C.A.Mey. – Caucasian alder. Caucasus, Iran Alnus tenuifolia Nutt. – thinleaf or mountain alder. Northwestern North America Alnus trabeculosa Hand.-Mazz. – China, Japan Subgenus Clethropsis Trees or shrubs with stalked shoot buds, male and female catkins produced in autumn (fall) and expanding and pollinating then, three species: Alnus formosana (Burkill) Makino – Formosan alder. Taiwan Alnus maritima (Marshall) Muhl. ex Nutt. – seaside alder. United States (Georgia, Delaware, Maryland, Oklahoma). Alnus nitida (Spach) Endl. – Himalayan alder. Western Himalaya, Pakistan, India, Nepal. Subgenus Alnobetula Shrubs with shoot buds not stalked, male and female catkins produced in late spring (after leaves appear) and expanding and pollinating then, one to four species: Alnus alnobetula (Ehrh.) K.Koch subsp. alnobetula (Ehrh.) K.Koch subsp. crispa (Aiton) Raus subsp. fruticosa (Rupr.) Raus subsp. sinuata (Regel) Raus subsp. suaveolens (Req.) Lambinon & Kerguélen Alnus firma Siebold & Zucc. - Kyushu (Japan) Alnus mandshurica (Callier) Hand.-Mazz. – Russian Far East, northeastern China, Korea Alnus maximowiczii Callier – Japan, Korea, Russian Far East Alnus pendula Matsum. - Honshu and Hokkaido (Japan) Alnus sieboldiana Matsum. - Honshu, Shikoku, and Suwanose-jima (Japan) Not assigned to a subgenus Alnus fauriei H.Lév. & Vaniot – Honshu Island in Japan Alnus ferdinandi-coburgii C.K.Schneid. – southern China Alnus glutipes (Jarm. ex Czerpek) Vorosch. Alnus hakkodensis Hayashi – Honshu Island in Japan Alnus henryi C.K.Schneid. – Taiwan Alnus lanata Duthie ex Bean – Sichuan Province in China Alnus mairei H.Lév. – Yunnan Province in China Alnus paniculata Nakai – Korea Alnus serrulatoides Callier – Japan Alnus vermicularis Nakai – Korea Species names with uncertain taxonomic status The status of the following species is unresolved: Alnus balatonialis Borbás Alnus cuneata Geyer ex Walp. Alnus dimitrovii Jordanov & Kitanov Alnus djavanshirii H.Zare – Iran Alnus dolichocarpa H.Zare, Amini & Assadi – Iran Alnus figerti Callier Alnus frangula L. ex Huth Alnus gigantea Nakai Alnus glandulosa Sarg. Alnus henedae Sugim. Alnus hybrida Rchb. Alnus laciniata Ehrh. Alnus lobata Nyman Alnus microphylla Arv.-Touv. Alnus obtusifolia Mert. ex Regel Alnus oxyacantha Lavalle Alnus subrotunda Desf. Alnus vilmoriana Lebas Alnus washingtonia Wetzel Hybrids The following hybrids have been described: Alnus × elliptica Req.—Italy. (A. cordata × A. glutinosa) Alnus × fallacina Callier—Ohio, New York State, Vermont, New Hampshire, Maine. (A. incana subsp. rugosa × A. serrulata) Alnus × hanedae Suyinata—Japan. (A. firma × A. sieboldiana) Alnus × hosoii Mizush.—Japan. (A. maximowiczii × A. pendula) Alnus × mayrii Callier—Russian Far East, Japan. (A. hirsuta × A. japonica) Alnus × peculiaris Hiyama—Kyūshū Island in Japan. (A. firma × A. pendula) Alnus × pubescens Tausch.—Northern and central Europe. (A. glutinosa × A. incana) Alnus × suginoi Sugim.—Japan. The status of the following hybrids is unresolved: Alnus × aschersoniana Callier Alnus × koehnei Callier Alnus × ljungeri Murai Alnus × purpusii Callier Alnus × silesiaca Fiek Alnus × spaethii Callier (A. japonica × A. subcordata) Fossils †Alnus heterodonta (Newberry) Meyer & Manchester 1987 – Oligocene fossil, Oregon Phylogeny The oldest fossil pollen that can be identified as Alnus is from northern Bohemia, dating to the late Paleocene, around 58 million years ago. Etymology The common name alder evolved from the Old English word alor, which in turn is derived from Proto-Germanic root aliso. The generic name Alnus is the equivalent Latin name, from whence French aulne and Spanish Alamo (Spanish term for "poplar"). Ecology Alders are commonly found near streams, rivers, and wetlands. Sometimes where the prevalence of alders is particularly prominent these are called alder carrs. In the Pacific Northwest of North America, the white alder (Alnus rhombifolia) unlike other northwest alders, has an affinity for warm, dry climates, where it grows along watercourses, such as along the lower Columbia River east of the Cascades and the Snake River, including Hells Canyon. Alder leaves and sometimes catkins are used as food by numerous butterflies and moths. A. glutinosa and A. viridis are classed as environmental weeds in New Zealand. Alder leaves and especially the roots are important to the ecosystem because they enrich the soil with nitrogen and other nutrients. Nitrogen fixation and succession of woodland species Alder is particularly noted for its important symbiotic relationship with Frankia alni, an actinomycete, filamentous, nitrogen-fixing bacterium. This bacterium is found in root nodules, which may be as large as a human fist, with many small lobes, and light brown in colour. The bacterium absorbs nitrogen from the air and makes it available to the tree. Alder, in turn, provides the bacterium with sugars, which it produces through photosynthesis. As a result of this mutually beneficial relationship, alder improves the fertility of the soil where it grows, and as a pioneer species, it helps provide additional nitrogen for the successional species to follow. Because of its abundance, red alder delivers large amounts of nitrogen to enrich forest soils. Red alder stands have been found to supply between of nitrogen annually to the soil. From Alaska to Oregon, Alnus viridis subsp. sinuata (A. sinuata, Sitka Alder or Slide Alder), characteristically pioneer fresh, gravelly sites at the foot of retreating glaciers. Studies show that Sitka alder, a more shrubby variety of alder, adds nitrogen to the soil at an average rate of per year, helping convert the sterile glacial terrain to soil capable of supporting a conifer forest. Alders are common among the first species to colonize disturbed areas from floods, windstorms, fires, landslides, etc. Alder groves often serve as natural firebreaks since these broad-leaved trees are much less flammable than conifers. Their foliage and leaf litter does not carry a fire well, and their thin bark is sufficiently resistant to protect them from light surface fires. In addition, the light weight of alder seedsnumbering allows for easy dispersal by the wind. Although it outgrows coastal Douglas-fir for the first 25 years, it is very shade intolerant and seldom lives more than 100 years. Red alder is the Pacific Northwest's largest alder and the most plentiful and commercially important broad-leaved tree in the coastal Northwest. Groves of red alder in diameter intermingle with young Douglas-fir forests west of the Cascades, attaining a maximum height of in about sixty years and then are afflicted by heart rot. Alders largely help create conditions favorable for giant conifers that replace them. Parasites Alder roots are parasitized by northern groundcone. Uses The catkins of some alder species have a degree of edibility, and may be rich in protein. Reported to have a bitter and unpleasant taste, they are more useful for survival purposes. The wood of certain alder species is often used to smoke various food items such as coffee, salmon, and other seafood. Most of the pilings that form the foundation of Venice were made from alder trees. Alder bark contains the anti-inflammatory salicin, which is metabolized into salicylic acid in the body. Some Native American cultures use red alder bark (Alnus rubra) to treat poison oak, insect bites, and skin irritations. Blackfeet Indians have traditionally used an infusion made from the bark of red alder to treat lymphatic disorders and tuberculosis. Recent clinical studies have verified that red alder contains betulin and lupeol, compounds shown to be effective against a variety of tumors. The inner bark of the alder, as well as red osier dogwood, or chokecherry, is used by some Indigenous peoples of the Americas in smoking mixtures, known as kinnikinnick, to improve the taste of the bearberry leaf. Alder is illustrated in the coat of arms for the Austrian town of Grossarl. Electric guitars, most notably those manufactured by the Fender Musical Instruments Corporation, have been built with alder bodies since the 1950s. Alder is appreciated for its tone that is claimed to be tight and evenly balanced, especially when compared to mahogany, and has been adopted by many electric guitar manufacturers. As a hardwood, alder is used in making furniture, cabinets, and other woodworking products. Alder bark and wood (like oak and sweet chestnut) contain tannin and are traditionally used to tan leather. A red dye can also be extracted from the outer bark, and a yellow dye from the inner bark. Culture Ermanno Olmi's movie The Tree of Wooden Clogs (L' Albero Degli Zoccoli, 1978) refers in its title to alder, typically used to make clogs as in this movie's plot. References Further reading External links Flora Europaea: Alnus Flora of Bolivia: Alnus Flora of China: Alnus Flora of North America: Alnus Flora of Pakistan: Alnus Taxa named by Philip Miller

1384

https://en.wikipedia.org/wiki/Amos%20Bronson%20Alcott

Amos Bronson Alcott

Amos Bronson Alcott (; November 29, 1799 – March 4, 1888) was an American teacher, writer, philosopher, and reformer. As an educator, Alcott pioneered new ways of interacting with young students, focusing on a conversational style, and avoided traditional punishment. He hoped to perfect the human spirit and, to that end, advocated a plant-based diet. He was also an abolitionist and an advocate for women's rights. Born in Wolcott, Connecticut, in 1799, Alcott had only minimal formal schooling before attempting a career as a traveling salesman. Worried that the itinerant life might have a negative impact on his soul, he turned to teaching. His innovative methods, however, were controversial, and he rarely stayed in one place very long. His most well-known teaching position was at the Temple School in Boston. His experience there was turned into two books: Records of a School and Conversations with Children on the Gospels. Alcott became friends with Ralph Waldo Emerson and became a major figure in transcendentalism. His writings on behalf of that movement, however, are heavily criticized for being incoherent. Based on his ideas for human perfection, Alcott founded Fruitlands, a transcendentalist experiment in community living. The project failed after seven months. Alcott and his family struggled financially for most of his life. Nevertheless, he continued focusing on educational projects and opened a new school at the end of his life in 1879. He died in 1888. Alcott married Abby May in 1830, and they had four surviving children, all daughters. Their second was Louisa May, who fictionalized her experience with the family in her novel Little Women in 1868. Life and work Early life A native New Englander, Amos Bronson Alcott was born in Wolcott, Connecticut (then recently renamed from "Farmingbury") on November 29, 1799. His parents were Joseph Chatfield Alcott and Anna Bronson Alcott. The family home was in an area known as Spindle Hill, and his father, Joseph Alcox, traced his ancestry to colonial-era settlers in eastern Massachusetts. The family originally spelled their name "Alcock", later changed to "Alcocke" then "Alcox". Amos Bronson, the oldest of eight children, later changed the spelling to "Alcott" and dropped his first name. At age six, young Bronson began his formal education in a one-room schoolhouse in the center of town but learned how to read at home with the help of his mother. The school taught only reading, writing, and spelling, and he left this school at the age of 10. At age 13, his uncle, Reverend Tillotson Bronson, invited Alcott into his home in Cheshire, Connecticut, to be educated and prepared for college. Bronson gave it up after only a month and was self-educated from then on. He was not particularly social and his only close friend was his neighbor and second cousin William Alcott, with whom he shared books and ideas. Bronson Alcott later reflected on his childhood at Spindle Hill: "It kept me pure ... I dwelt amidst the hills ... God spoke to me while I walked the fields." Starting at age 15, he worked for clockmaker Seth Thomas in the nearby town of Plymouth. At age 17, Alcott passed the exam for a teaching certificate but had trouble finding work as a teacher. Instead, he left home and became a traveling salesman in the American South, peddling books and merchandise. He hoped the job would earn him enough money to support his parents, "to make their cares, and burdens less ... and get them free from debt", though he soon spent most of his earnings on a new suit. At first, he thought it an acceptable occupation but soon worried about his spiritual well-being. In March 1823, Alcott wrote to his brother: "Peddling is a hard place to serve God, but a capital one to serve Mammon." Near the end of his life, he fictionalized this experience in his book, New Connecticut, originally circulated only among friends before its publication in 1881. Early career and marriage By the summer of 1823, Alcott returned to Connecticut in debt to his father, who had bailed him out after his last two unsuccessful sales trips. He took a job as a schoolteacher in Cheshire with the help of his Uncle Tillotson. He quickly set about reforming the school. He added backs to the benches on which students sat, improved lighting and heating, de-emphasized rote learning, and provided individual slates to each student—paid for by himself. Alcott had been influenced by educational philosophy of the Swiss pedagogue Johann Heinrich Pestalozzi and even renamed his school "The Cheshire Pestalozzi School". His style attracted the attention of Samuel Joseph May, who introduced Alcott to his sister Abby May. She called him, "an intelligent, philosophic, modest man" and found his views on education "very attractive". Locals in Cheshire were less supportive and became suspicious of his methods. Many students left and were enrolled in the local common school or a recently reopened private school for boys. On November 6, 1827, Alcott started teaching in Bristol, Connecticut, still using the same methods he used in Cheshire, but opposition from the community surfaced quickly; he was unemployed by March 1828. He moved to Boston on April 24, 1828, and was immediately impressed, referring to the city as a place "where the light of the sun of righteousness has risen". He opened the Salem Street Infant School two months later on June 23. Abby May applied as his teaching assistant; instead, the couple were engaged, without consent of the family. They were married at King's Chapel on May 22, 1830; he was 30 years old and she was 29. Her brother conducted the ceremony and a modest reception followed at her father's house. After their marriage the Alcotts moved to 12 Franklin Street in Boston, a boarding house run by a Mrs. Newall. Around this time, Alcott also first expressed his public disdain for slavery. In November 1830, he and William Lloyd Garrison founded what he later called a "preliminary Anti-Slavery Society", though he differed from Garrison as a nonresistant. Alcott became a member of the Boston Vigilance Committee. Attendance at Alcott's school was falling when a wealthy Quaker named Reuben Haines III proposed that he and educator William Russell start a new school in Pennsylvania, associated with the Germantown Academy. Alcott accepted and he and his newly pregnant wife set forth on December 14. The school was established in Germantown and the Alcotts were offered a rent-free home by Haines. Alcott and Russell were initially concerned that the area would not be conducive to their progressive approach to education and considered establishing the school in nearby Philadelphia instead. Unsuccessful, they went back to Germantown, though the rent-free home was no longer available and the Alcotts instead had to rent rooms in a boarding-house. It was there that their first child, a daughter they named Anna Bronson Alcott, was born on March 16, 1831, after 36 hours of labor. By the fall of that year, their benefactor Haines died suddenly and the Alcotts again suffered financial difficulty. "We hardly earn the bread", wrote Abby May to her brother, "[and] the butter we have to think about." The couple's only son was born on April 6, 1839, but lived only a few minutes. The mother recorded: "Gave birth to a fine boy full grown perfectly formed but not living". It was in Germantown that the couple's second daughter was born. Louisa May Alcott was born on her father's birthday, November 29, 1832, at a half-hour past midnight. Bronson described her as "a very fine healthful child, much more so than Anna was at birth". The Germantown school, however, was faltering; soon only eight pupils remained. Their benefactor Haines died before Louisa's birth. He had helped recruit students and even paid tuition for some of them. As Abby wrote, his death "has prostrated all our hopes here". On April 10, 1833, the family moved to Philadelphia, where Alcott ran a day school. As usual, Alcott's methods were controversial; a former student later referred to him as "the most eccentric man who ever took on himself to train and form the youthful mind". Alcott began to believe Boston was the best place for his ideas to flourish. He contacted theologian William Ellery Channing for support. Channing approved of Alcott's methods and promised to help find students to enroll, including his daughter Mary. Channing also secured aid from Justice Lemuel Shaw and Boston mayor Josiah Quincy, Jr. Experimental educator On September 22, 1834, Alcott opened a school of about 30 students, mostly from wealthy families. It was named the Temple School because classes were held at the Masonic Temple on Tremont Street in Boston. His assistant was Elizabeth Palmer Peabody, later replaced by Margaret Fuller. Mary Peabody Mann served as a French instructor for a time. The school was briefly famous, and then infamous, because of Alcott's method of "discarding text-books and teaching by conversation", his questioning attitude toward the Bible, and his reception of "a colored girl" into his classes. Before 1830, primary and secondary teaching of writing consisted of rote drills in grammar, spelling, vocabulary, penmanship and transcription of adult texts. In that decade, however, progressive reformers such as Alcott, influenced by Pestalozzi, Friedrich Fröbel, and Johann Friedrich Herbart, began to advocate compositions based on students' own experiences. These reformers opposed beginning instruction with rules and preferred to have students learn to write by expressing their personal understanding of the events of their lives. Alcott sought to develop instruction on the basis of self-analysis, with an emphasis on conversation and questioning rather than lecturing and drill. A similar interest in instructive conversation was shared by Abby May who, describing her idea of a family "post office" set up to curb potential domestic tension, said "I thought it would afford a daily opportunity for the children, indeed all of us, to interchange thought and sentiment". Alongside writing and reading, Alcott gave lessons in "spiritual culture", which included interpretation of the Gospels, and advocated object teaching in writing instruction. He even went so far as to decorate his schoolroom with visual elements he thought would inspire learning: paintings, books, comfortable furniture, and busts or portraits of Plato, Socrates, Jesus, and William Ellery Channing. During this time, the Alcotts had another child. Born on June 24, 1835, she was named Elizabeth Peabody Alcott in honor of the teaching assistant at the Temple School. By age three, however, her mother changed her name to Elizabeth Sewall Alcott, after her own mother, perhaps because of the recent rupture between Bronson Alcott and Elizabeth Palmer Peabody. In July 1835, Peabody published her account as an assistant to the Temple School as Record of a School: Exemplifying the General Principles of Spiritual Culture. While working on a second book, Alcott and Peabody had a falling out and Conversations with Children on the Gospels was prepared with help from Peabody's sister Sophia, published at the end of December 1836. Alcott's methods were not well received; many found his conversations on the Gospels close to blasphemous. For example, he asked students to question if Biblical miracles were literal and suggested that all people are part of God. In the Boston Daily Advertiser, Nathan Hale criticized Alcott's "flippant and off hand conversation" about serious topics from the Virgin birth of Jesus to circumcision. Joseph T. Buckingham called Alcott "either insane or half-witted" and "an ignorant and presuming charlatan". The book did not sell well; a Boston lawyer bought 750 copies to use as waste paper. The Temple School was widely denounced in the press. Reverend James Freeman Clarke was one of Alcott's few supporters and defended him against the harsh response from Boston periodicals. Alcott was rejected by most public opinion and, by the summer of 1837, he had only 11 students left and no assistant after Margaret Fuller moved to Providence, Rhode Island. The controversy had caused many parents to remove their children and, as the school closed, Alcott became increasingly financially desperate. Remaining steadfast to his pedagogy, a forerunner of progressive and democratic schooling, he alienated parents in a later "parlor school" by admitting an African American child to the class, whom he then refused to expel in the face of protests. Transcendentalist Beginning in 1836, Alcott's membership in the Transcendental Club put him in the company of such as Ralph Waldo Emerson, Orestes Brownson and Theodore Parker. He became a member at the club's second meeting and hosted its third. A biographer of Emerson described the group as "the occasional meetings of a changing body of liberal thinkers, agreeing in nothing but their liberality". Frederic Henry Hedge wrote similarly that "[t]here was no club in the strict sense ... only occasional meetings of like-minded men and women". Alcott preferred the term "Symposium" for their group. In late April 1840, Alcott moved to the town of Concord urged by Emerson. He rented a home for $50 a year within walking distance of Emerson's house. He named it Dove Cottage. A supporter of his philosophies, Emerson offered to help Alcott with his writing. This proved a difficult task. For example, after several revisions of the essay "Psyche" (Alcott's account of how he educated his daughters), Emerson deemed it unpublishable. Alcott also wrote a series patterned after the work of German writer Johann Wolfgang von Goethe which was published in the Transcendentalists' journal, The Dial. Emerson had written to Margaret Fuller, then editor, that Alcott's so-called "Orphic Sayings" might "pass muster & even pass for just & great", but they were widely mocked as silly and unintelligible. Fuller herself disliked them, but did not want to hurt Alcott's feelings. The following example appeared in the first issue: With financial support from Emerson, and leaving his family in the care of his brother Junius, Alcott departed Concord for a visit to England on May 8, 1842. There he met admirers Charles Lane and Henry C. Wright, supporters of Alcott House, an experimental school outside London based on Alcott's Temple School methods. The two men followed Alcott back to the United States and, in an early communitarian experiment, Lane and his son moved in with the Alcotts. Persuaded in part by Lane's abolitionist views, Alcott took a stand against President Tyler's plan to annex Texas as a slave territory and refused to pay his poll tax. Abby May wrote in her journal on January 17, 1843, "A day of some excitement, as Mr. Alcott refused to pay his town tax ... After waiting some time to be committed [to jail], he was told it was paid by a friend. Thus we were spared the affliction of his absence and the triumph of suffering for his principles." The incident inspired Henry David Thoreau, whose similar protest against the $1.50 poll tax led to a night in jail and his essay "Civil Disobedience". Fruitlands Lane and Alcott collaborated on a major expansion of their educational theories into a Utopian society. Alcott, however, was still in debt and could not purchase the land needed for their planned community. In a letter, Lane wrote, "I do not see anyone to act the money part but myself." In May 1843, he purchased a farm in Harvard, Massachusetts. Up front, he paid $1,500 of the total $1,800 value of the property; the rest was meant to be paid by the Alcotts over a two-year period. They moved to the farm on June 1 and optimistically named it "Fruitlands" despite only ten old apple trees on the property. In July, Alcott announced their plans in The Dial: "We have made an arrangement with the proprietor of an estate of about a hundred acres, which liberates this tract from human ownership". Their goal was to regain Eden, to find the formula for agriculture, diet, and reproduction that would provide the perfect way for the individual to live "in harmony with nature, the animal world, his fellows, himself, [and] his creator". In order to achieve this, they removed themselves from the economy as much as possible and lived independently, styling themselves a "consociate family". Unlike a similar project named Brook Farm, the participants at Fruitlands avoided interaction with other local communities. At first scorning animal labor as exploitative, they found human spadework insufficient to their needs and eventually allowed some cattle to be "enslaved". They banned coffee, tea, alcoholic drinks, milk, and warm bathwater. As Alcott had published earlier, "Our wine is water, — flesh, bread; — drugs, fruits." One member, Samuel Bower, "gave the community the reputation of refusing to eat potatoes because instead of aspiring toward the sky they grew downward in the earth", For clothing, they prohibited leather, because animals were killed for it, as well as cotton, silk, and wool, because they were products of slave labor. Alcott had high expectations, but was often away, attempting to recruit more members when the community most needed him. The experimental community was never successful, partly because most of the land was not arable. Alcott lamented, "None of us were prepared to actualize practically the ideal life of which we dreamed. So we fell apart". Its founders were often away as well; in the middle of harvesting, they left for a lecture tour through Providence, Rhode Island, New York City, and New Haven, Connecticut. In its seven months, only 13 people joined, included the Alcotts and Lanes. Other than Abby May and her daughters, only one other woman joined, Ann Page. One rumor is that Page was asked to leave after eating a fish tail with a neighbor. Lane believed Alcott had misled him into thinking enough people would join the enterprise and developed a strong dislike for the nuclear family. He quit the project and moved to a nearby Shaker family with his son. After Lane's departure, Alcott fell into a depression and could not speak or eat for three days. Abby May thought Lane purposely sabotaged her family. She wrote to her brother, "All Mr. Lane's efforts have been to disunite us. But Mr. Alcott's ... paternal instincts were too strong for him." When the final payment on the farm was owed, Sam May refused to cover his brother-in-law's debts, as he often did, possibly at Abby May's suggestion. The experiment failed, the Alcotts had to leave Fruitlands. The members of the Alcott family were not happy with their Fruitlands experience. At one point, Abby May threatened that she and their daughters would move elsewhere, leaving Bronson behind. Louisa May Alcott, who was ten years old at the time, later wrote of the experience in Transcendental Wild Oats (1873): "The band of brothers began by spading garden and field; but a few days of it lessened their ardor amazingly." Return to Concord In January 1844, Alcott moved his family to Still River, a village within Harvard but, on March 1, 1845, the family returned to Concord to live in a home they named "The Hillside" (later renamed "The Wayside" by Nathaniel Hawthorne). Both Emerson and Sam May assisted in securing the home for the Alcotts. While living in the home, Louisa began writing in earnest and was given her own room. She later said her years at the home "were the happiest years" of her life; many of the incidents in her novel Little Women (1868) are based on this period. Alcott renovated the property, moving a barn and painting the home a rusty olive color, as well as tending to over six acres of land. On May 23, 1845, Abby May was granted a sum from her father's estate which was put into a trust fund, granting minor financial security. That summer, Bronson Alcott let Henry David Thoreau borrow his ax to prepare his home at Walden Pond. The Alcotts hosted a steady stream of visitors at The Hillside, including fugitive slaves, which they hosted in secret as a station of the Underground Railroad. Alcott's opposition to slavery also fueled his opposition to the Mexican–American War which began in 1846. He considered the war a blatant attempt to extend slavery and asked if the country was made up of "a people bent on conquest, on getting the golden treasures of Mexico into our hands, and of subjugating foreign peoples?" In 1848, Abby May insisted they leave Concord, which she called "cold, heartless, brainless, soulless". The Alcott family put The Hillside up for rent and moved to Boston. There, next door to Peabody's book store on West Street, Bronson Alcott hosted a series based on the "Conversations" model by Margaret Fuller called "A Course on the Conversations on Man—his History, Resources, and Expectations". Participants, both men and women, were charged three dollars to attend or five dollars for all seven lectures. In March 1853, Alcott was invited to teach fifteen students at Harvard Divinity School in an extracurricular, non-credit course. Alcott and his family moved back to Concord after 1857, where he and his family lived in the Orchard House until 1877. In 1860, Alcott was named superintendent of Concord Schools. Civil War years and beyond Alcott voted in a presidential election for the first time in 1860. In his journal for November 6, 1860, he wrote: "At Town House, and cast my vote for Lincoln and the Republican candidates generally—the first vote I ever cast for a President and State officers." Alcott was an abolitionist and a friend of the more radical William Lloyd Garrison. He had attended a rally led by Wendell Phillips on behalf of 17-year-old Thomas Sims, a fugitive slave on trial in Boston. Alcott was one of several who attempted to storm the courthouse; when gunshots were heard, he was the only one who stood his ground, though the effort was unsuccessful. He had also stood his ground in a protest against the trial of Anthony Burns. A group had broken down the door of the Boston courthouse but guards beat them back. Alcott stood forward and asked the leader of the group, Thomas Wentworth Higginson, "Why are we not within?" He then walked calmly into the courthouse, was threatened with a gun, and turned back, "but without hastening a step", according to Higginson. In 1862, Louisa moved to Washington, D.C. to volunteer as a nurse. On January 14, 1863, the Alcotts received a telegram that Louisa was sick; Bronson immediately went to bring her home, briefly meeting Abraham Lincoln while there. Louisa turned her experience into the book Hospital Sketches. Her father wrote of it, "I see nothing in the way of a good appreciation of Louisa's merits as a woman and a writer." Henry David Thoreau died on May 6, 1862, likely from an illness he caught from Alcott two years earlier. At Emerson's request, Alcott helped arrange Thoreau's funeral, which was held at First Parish Sanctuary in Concord, despite Thoreau having disavowed membership in the church when he was in his early twenties. Emerson wrote a eulogy, and Alcott helped plan the preparations. Only two years later, neighbor Nathaniel Hawthorne died as well. Alcott served as a pallbearer along with Louis Agassiz, James T. Fields, Oliver Wendell Holmes, Sr., Henry Wadsworth Longfellow, and others. With Hawthorne's death, Alcott worried that few of the Concord notables remained. He recorded in his journal: "Fair figures one by one are fading from sight." The next year, Lincoln was assassinated, which Alcott called "appalling news". In 1868, Alcott met with publisher Thomas Niles, an admirer of Hospital Sketches. Alcott asked Niles if he would publish a book of short stories by his daughter; instead, he suggested she write a book about girls. Louisa May was not interested initially but agreed to try. "They want a book of 200 pages or more", Alcott told his daughter. The result was Little Women, published later that year. The book, which fictionalized the Alcott family during the girls' coming-of-age years, recast the father figure as a chaplain, away from home at the front in the Civil War. Alcott spoke, as opportunity arose, before the "lyceums" then common in various parts of the United States, or addressed groups of hearers as they invited him. These "conversations" as he called them, were more or less informal talks on a great range of topics, spiritual, aesthetic and practical, in which he emphasized the ideas of the school of American Transcendentalists led by Emerson, who was always his supporter and discreet admirer. He often discussed Platonic philosophy, the illumination of the mind and soul by direct communion with Spirit; upon the spiritual and poetic monitions of external nature; and upon the benefit to man of a serene mood and a simple way of life. Final years Alcott's published books, all from late in his life, include Tablets (1868), Concord Days (1872), New Connecticut (1881), and Sonnets and Canzonets (1882). Louisa May attended to her father's needs in his final years. She purchased a house for her sister Anna which had been the last home of Henry David Thoreau, now known as the Thoreau-Alcott House. Louisa and her parents moved in with Anna as well. After the death of his wife Abby May on November 25, 1877, Alcott never returned to Orchard House, too heartbroken to live there. He and Louisa May collaborated on a memoir and went over her papers, letters, and journals. "My heart bleeds with the memories of those days", he wrote, "and even long years, of cheerless anxiety and hopeless dependence." Louisa noted her father had become "restless with his anchor gone". They gave up on the memoir project and Louisa burned many of her mother's papers. On January 19, 1879, Alcott and Franklin Benjamin Sanborn wrote a prospectus for a new school which they distributed to potentially interested people throughout the country. The result was the Concord School of Philosophy and Literature, which held its first session in 1879 in Alcott's study in the Orchard House. In 1880 the school moved to the Hillside Chapel, a building next to the house, where he held conversations and, over the course of successive summers, as he entered his eighties, invited others to give lectures on themes in philosophy, religion and letters. The school, considered one of the first formal adult education centers in America, was also attended by foreign scholars. It continued for nine years. In April 1882, Alcott's friend and benefactor Ralph Waldo Emerson was sick and bedridden. After visiting him, Alcott wrote, "Concord will be shorn of its human splendor when he withdraws behind the cloud." Emerson died the next day. Alcott himself moved out of Concord for his final years, settling at 10 Louisburg Square in Boston beginning in 1885. As he was bedridden at the end of his life, Alcott's daughter Louisa May came to visit him at Louisburg on March 1, 1888. He said to her, "I am going up. Come with me." She responded, "I wish I could." He died three days later on March 4; Louisa May died only two days after her father. Beliefs Alcott was fundamentally and philosophically opposed to corporal punishment as a means of disciplining his students. Instead, beginning at the Temple School, he would appoint a daily student superintendent. When that student observed an infraction, he or she reported it to the rest of the class and, as a whole, they deliberated on punishment. At times, Alcott offered his own hand for an offending student to strike, saying that any failing was the teacher's responsibility. The shame and guilt this method induced, he believed, was far superior to the fear instilled by corporal punishment; when he used physical "correction" he required that the students be unanimously in support of its application, even including the student to be punished. The most detailed discussion of his theories on education is in an essay, "Observations on the Principles and Methods of Infant Instruction". Alcott believed that early education must draw out "unpremeditated thoughts and feelings of the child" and emphasized that infancy should primarily focus on enjoyment. He noted that learning was not about the acquisition of facts but the development of a reflective state of mind. Alcott's ideas as an educator were controversial. Writer Harriet Martineau, for example, wrote dubiously that, "the master presupposes his little pupils possessed of all truth; and that his business is to bring it out into expression". Even so, his ideas helped to found one of the first adult education centers in America, and provided the foundation for future generations of liberal education. Many of Alcott's educational principles are still used in classrooms today, including "teach by encouragement", art education, music education, acting exercises, learning through experience, risk-taking in the classroom, tolerance in schools, physical education/recess, and early childhood education. The teachings of William Ellery Channing a few years earlier had also laid the groundwork for the work of most of the Concord Transcendentalists. The Concord School of Philosophy, which closed following Alcott's death in 1888, was reopened almost 90 years later in the 1970s. It has continued functioning with a Summer Conversational Series in its original building at Orchard House, now run by the Louisa May Alcott Memorial Association. While many of Alcott's ideas continue to be perceived as being on the liberal/radical edge, they are still common themes in society, including vegetarian/veganism, sustainable living, and temperance/self-control. Alcott described his sustenance as a "Pythagorean diet": Meat, eggs, butter, cheese, and milk were excluded and drinking was confined to well water. Alcott believed that diet held the key to human perfection and connected physical well-being to mental improvement. He further viewed a perfection of nature to the spirit and, in a sense, predicted modern environmentalism by condemning pollution and encouraging humankind's role in sustaining ecology. Criticism Alcott's philosophical teachings have been criticized as inconsistent, hazy or abrupt. He formulated no system of philosophy, and shows the influence of Plato, German mysticism, and Immanuel Kant as filtered through the writings of Samuel Taylor Coleridge. Margaret Fuller referred to Alcott as "a philosopher of the balmy times of ancient Greece—a man whom the worldlings of Boston hold in as much horror as the worldlings of Athens held Socrates." In his later years, Alcott related a story from his boyhood: during a total solar eclipse, he threw rocks at the sky until he fell and dislocated his shoulder. He reflected that the event was a prophecy that he would be "tilting at the sun and always catching the fall". Like Emerson, Alcott was always optimistic, idealistic, and individualistic in thinking. Writer James Russell Lowell referred to Alcott in his poem "Studies for Two Heads" as "an angel with clipped wings". Even so, Emerson noted that Alcott's brilliant conversational ability did not translate into good writing. "When he sits down to write," Emerson wrote, "all his genius leaves him; he gives you the shells and throws away the kernel of his thought." His "Orphic Sayings", published in The Dial, became famous for their hilarity as dense, pretentious, and meaningless. In New York, for example, The Knickerbocker published a parody titled "Gastric Sayings" in November 1840. A writer for the Boston Post referred to Alcott's "Orphic Sayings" as "a train of fifteen railroad cars with one passenger". Modern critics often fault Alcott for not being able to financially support his family. Alcott himself worried about his own prospects as a young man, once writing to his mother that he was "still at my old trade—hoping." Alcott held his principles above his and his family's well-being. Shortly before his marriage, for example, his future father-in-law Colonel Joseph May helped him find a job teaching at a school in Boston run by the Society of Free Enquirers, followers of Robert Owen, for a lucrative $1,000 to $1,200 annual salary. He refused it because he did not agree with their beliefs, writing, "I shall have nothing to do with them." From the other perspective, the Alcotts created an environment which produced two famous daughters in different fields in a time when women were not commonly encouraged to have independent careers. Works Observations on the Principles and Methods of Infant Instruction (1830) The Doctrine and Discipline of Human Culture (1836) Conversations with Children on the Gospels (Volume I, 1836) Conversations with Children on the Gospels (Volume II, 1837) Tablets (1868) Concord Days (1872) Table-Talk (1877) New Connecticut: An Autobiographical Poem (1887; first edition privately printed in 1882) Sonnets and Canzonets (1882) Ralph Waldo Emerson, Philosopher and Seer: An Estimate of His Character and Genius in Prose and Verse (1882) The Journals of Bronson Alcott (1966) References Notes Sources External links Amos Bronson Alcott Network Alcott biography on American Transcendentalism Web Alcott at Perspectives in American Literature Bronson Alcott: A glimpse at our vegetarian heritage, by Karen Iacobbo Guide to Books from the library of Amos Bronson Alcott at Houghton Library, Harvard University Guide to Amos Bronson Alcott papers at Houghton Library, Harvard University 1799 births 1888 deaths 19th-century American educators 19th-century American philosophers Alcott family Abolitionists from Boston American people of English descent Philosophers from Connecticut Philosophers from Massachusetts Schoolteachers from Massachusetts American tax resisters American veganism activists American women's rights activists Feminist philosophers Founders of utopian communities Male feminists Massachusetts Republicans Members of the Transcendental Club People from Concord, Massachusetts People from Harvard, Massachusetts People from Wolcott, Connecticut Sonneteers Tea critics Underground Railroad people

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

Arachnophobia

Arachnophobia is a specific phobia brought about by the irrational fear of spiders and other arachnids such as scorpions. Signs and symptoms People with arachnophobia tend to feel uneasy in any area they believe could harbour spiders or that has visible signs of their presence, such as webs. If arachnophobes see a spider, they may not enter the general vicinity until they have overcome the panic attack that is often associated with their phobia. Some people scream, cry, have emotional outbursts, experience trouble breathing, sweat and experience increased heart rates when they come in contact with an area near spiders or their webs. In some extreme cases, even a picture, a toy, or a realistic drawing of a spider can trigger intense fear. Reasons Arachnophobia may be an exaggerated form of an instinctive response that helped early humans to survive or a cultural phenomenon that is most common in predominantly European societies. Evolutionary An evolutionary reason for the phobia remains unresolved. One view, especially held in evolutionary psychology, is that the presence of venomous spiders led to the evolution of a fear of spiders, or made acquisition of a fear of spiders especially easy. Like all traits, there is variability in the intensity of fear of spiders, and those with more intense fears are classified as phobic. Being relatively small, spiders do not fit the usual criterion for a threat in the animal kingdom where size is a factor, but they can have medically significant venom and/or cause skin irritation with their setae. However, a phobia is an irrational fear as opposed to a rational fear. By ensuring that their surroundings were free from spiders, arachnophobes would have had a reduced risk of being bitten in ancestral environments, giving them a slight advantage over non-arachnophobes in terms of survival. However, having a disproportionate fear of spiders in comparison to other, potentially dangerous creatures present during Homo sapiens environment of evolutionary adaptiveness may have had drawbacks. In The Handbook of the Emotions (1993), psychologist Arne Öhman studied pairing an unconditioned stimulus with evolutionarily-relevant fear-response neutral stimuli (snakes and spiders) versus evolutionarily-irrelevant fear-response neutral stimuli (mushrooms, flowers, physical representation of polyhedra, firearms, and electrical outlets) on human subjects and found that ophidiophobia (fear of snakes) and arachnophobia required only one pairing to develop a conditioned response while mycophobia, anthophobia, phobias of physical representations of polyhedra, firearms, and electrical outlets required multiple pairings and went extinct without continued conditioning while the conditioned ophidiophobia and arachnophobia were permanent. Psychiatrist Randolph M. Nesse notes that while conditioned fear responses to evolutionarily novel dangerous objects such as electrical outlets is possible, the conditioning is slower because such cues have no prewired connection to fear, noting further that despite the emphasis of the risks of speeding and drunk driving in driver's education, it alone does not provide reliable protection against traffic collisions and that nearly one-quarter of all deaths in 2014 of people aged 15 to 24 in the United States were in traffic collisions. Nesse, psychiatrist Isaac Marks, and evolutionary biologist George C. Williams have noted that people with systematically deficient responses to various adaptive phobias (e.g. arachnophobia, ophidiophobia, basophobia) are more temperamentally careless and more likely to receive unintentional injuries that are potentially fatal and have proposed that such deficient phobia should be classified as "hypophobia'" due to its selfish genetic consequences. A 2001 study found that people could detect images of spiders among images of flowers and mushrooms more quickly than they could detect images of flowers or mushrooms among images of spiders. The researchers suggested that this was because fast response to spiders was more relevant to human evolution. Cultural An alternative view is that the dangers, such as from spiders, are overrated and not sufficient to influence evolution. Instead, inheriting phobias would have restrictive and debilitating effects upon survival, rather than being an aid. For some communities such as in Papua New Guinea and Cambodia spiders are included in traditional foods. This suggests arachnophobia may, at least in part, be a cultural, rather than genetic trait. Stories about spiders in the media often contain errors and use sensationalistic vocabulary, which could contribute to the fear of spiders. Treatments The fear of spiders can be treated by any of the general techniques suggested for specific phobias. The first line of treatment is systematic desensitization – also known as exposure therapy. Before engaging in systematic desensitization, it is common to train the individual with arachnophobia in relaxation techniques, which will help keep the patient calm. Systematic desensitization can be done in vivo (with live spiders) or by getting the individual to imagine situations involving spiders, then modelling interaction with spiders for the person affected and eventually interacting with real spiders. This technique can be effective in just one session, although it generally takes more time. Recent advances in technology have enabled the use of virtual or augmented reality spiders for use in therapy. These techniques have proven to be effective. It has been suggested that exposure to short clips from the Spider-Man movies may help to reduce an individual's arachnophobia. Epidemiology Arachnophobia affects 3.5 to 6.1 percent of the global population. See also Apiphobia, fear of bees Entomophobia, fear of insects Myrmecophobia, fear of ants References External links National Geographic: "Fear of Snakes, Spiders Rooted in Evolution, Study Finds" Zoophobias Arachnids and humans

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

Alabaster

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

1389

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

Ahab

Ahab (; Aḫâbbu [a-ḫa-ab-bu]; Achaáb; ) was the seventh king of Israel, the son and successor of King Omri and the husband of Jezebel of Sidon, according to the Hebrew Bible. The Hebrew Bible presents Ahab as a wicked king, particularly for condoning Jezebel's influence on religious policies and his principal role behind Naboth's arbitrary execution. The existence of Ahab is historically supported outside the Bible. Shalmaneser III of Assyria documented in 853 BC that he defeated an alliance of a dozen kings in the Battle of Qarqar; one of these was Ahab. He is also mentioned on the inscriptions of the Mesha Stele. Ahab became king of Israel in the thirty-eighth year of King Asa of Judah, and reigned for twenty-two years, according to 1 Kings. William F. Albright dated his reign to 869–850 BC, while Edwin R. Thiele offered the dates 874–853 BC. Most recently, Michael Coogan has dated Ahab's reign to 871–852 BC. Reign King Omri, Ahab's father and founder of the short-lived Omri dynasty, seems to have been a successful military leader; he is reported in the text of the Moabite Mesha Stele to have "oppressed Moab for many days." During Ahab's reign, Moab, which had been conquered by his father, remained tributary. Ahab was allied by marriage with Jehoshaphat, who was king of Judah. Only with Aram-Damascus is he believed to have had strained relations, though the two kingdoms also shared an alliance for some years. Ahab married Jezebel, the daughter of the King of Tyre. tells the story of Ahab and Jezebel, and indicates that Jezebel was a dominant influence on Ahab, persuading him to abandon Yahweh and establish the religion of Baal in Israel. Ahab lived in Samaria, the royal capital established by Omri, and built a temple and altar to Baal there. These actions were said to have led to severe consequences for Israel, including a drought that lasted for several years and Jezebel's fanatical religious persecution of the prophets of Yahweh, which Ahab condoned. His reputation was so negative that in 1 Kings 16:34, the author attributed to his reign the deaths of Abiram and Segub, the sons of Hiel of Bethel, caused by their father's invocation of Joshua's curse several centuries before. According to , war later erupted between Ahab and king Hadadezer of Aram-Damascus (which the Bible refers to as "Ben-Hadad II") and that Ahab was able to defeat and capture him; however, soon after that, a peace treaty was made between the two and alliance between Israel and Aram-Damascus was formed. Battle of Qarqar The Battle of Qarqar is mentioned in extra-biblical records, and was perhaps at Apamea, where Shalmaneser III of Assyria fought a great confederation of princes from Cilicia, Northern Syria, Israel, Ammon, and the tribes of the Syrian desert (853 BCE), including Arabs, Ahab the Israelite (A-ha-ab-bu matSir-'a-la-a-a) and Hadadezer (Adad-'idri). Ahab's contribution was estimated at 2000 chariots and 10,000 men. In reality, however, the number of chariots in Ahab's forces was probably closer to a number in the hundreds (based upon archaeological excavations of the area and the foundations of stables that have been found). If, however, the numbers are referring to allies, they could possibly include forces from Tyre, Judah, Edom, and Moab. The Assyrian king claimed a victory, but his immediate return and subsequent expeditions in 849 BC and 846 BC against a similar but unspecified coalition seem to show that he met with no lasting success. Jezreel has been identified as Ahab's fortified chariot and cavalry base. Ahab and the prophets In the Biblical text, Ahab has five important encounters with prophets: The first encounter is with Elijah, who predicts a drought because of Ahab's sins. Because of this, Ahab refers to him as "the troubler of Israel" (1 Kings 18:17). This encounter ends with Elijah's victory over the prophets of Baal in a contest held for the sake of Ahab and the Israelites, to bring them into repentance. The second encounter is between Ahab and an unnamed prophet in . The third is again between Ahab and an unnamed prophet who condemns Ahab for his actions in a battle that had just taken place. The fourth is when Elijah confronts Ahab over his role in the unjust execution of Naboth and usurpation of the latter's ancestral vineyard. Upon the prophet's remonstration ("Hast thou killed and also taken possession?"), Ahab sincerely repented, which God relays to Elijah. The fifth encounter is with Micaiah, the prophet who, when asked for advice to recapturing Ramoth-Gilead, sarcastically assures Ahab that he will be successful. Micaiah ultimately tells him the truth of God's plan to kill Ahab in battle, due to his reliance on the false prophets, who were empowered by a deceiving spirit. Death of Ahab After some years, Ahab with Jehoshaphat of Judah went to recover Ramoth-Gilead from the Arameans. During this battle, Ahab disguised himself, but he was mortally wounded by an unaimed arrow. The Hebrew Bible says that dogs licked his blood, according to the prophecy of Elijah. But the Septuagint adds that pigs also licked his blood, symbolically making him unclean to the Israelites, who abstained from pork. Ahab was succeeded by his sons, Ahaziah and Jehoram. Jezebel's death, however, was more dramatic than Ahab's. As recorded in , Jehu had his servants throw Jezebel out of a window, causing her death. The dogs ate Jezebel's body, leaving nothing but her skull, her feet, and the palms of her hands, as prophesied by Elijah. Legacy 1 Kings 16:29 through 22:40 contains the narrative of Ahab's reign. His reign was slightly more emphasized upon than the previous kings, due to his blatant trivialization of the "sins of Jeroboam", which the previous kings of Israel were plagued by, and his subsequent marriage with a pagan princess, the nationwide institution of Baal worship, the persecution of Yahweh's prophets and Naboth's shocking murder. These offenses and atrocities stirred up populist resentment from figures such as Elijah and Micaiah. Indeed, he is referred to by the author of Kings as being "more evil than all the kings before him". Nonetheless, there were achievements that the author took note of, including his ability to fortify numerous Israelite cities and build an ivory palace. Adherents of the Yahwist religion found their principal champion in Elijah. His denunciation of the royal dynasty of Israel and his emphatic insistence on the worship of Yahweh and Yahweh alone, illustrated by the contest between Yahweh and Baal on Mount Carmel, form the keynote to a period that culminated in the accession of Jehu, an event in which Elijah's chosen disciple Elisha was the leading figure and the Omride Dynasty was brutally defeated. In Rabbinic literature Ahab was one of the three or four wicked kings of Israel singled out by tradition as being excluded from the future world of bliss (Sanh. x. 2; Tosef., Sanh. xii. 11). Midrash Konen places him in the fifth department of Gehenna, as having the heathen under his charge. Though held up as a warning to sinners, Ahab is also described as displaying noble traits of character (Sanh. 102b; Yer. Sanh. xi. 29b). Talmudic literature represents him as an enthusiastic idolater who left no hilltop in the Land of Israel without an idol before which he bowed, and to which he or his wife, Jezebel, brought his weight in gold as a daily offering. So defiant in his apostasy was he that he had inscribed on all the doors of the city of Samaria the words, "Ahab hath abjured the living God of Israel." Nevertheless, he paid great respect to the representatives of learning, "to the Torah given in twenty-two letters," for which reason he was permitted to reign for twenty-two successive years. He generously supported the students of the Law out of his royal treasury, in consequence of which half his sins were forgiven him. A type of worldliness (Ber. 61b), the Crœsus of his time, he was, according to ancient tradition (Meg. 11a), ruler over the whole world. Two hundred and thirty subject kings had initiated a rebellion; but he brought their sons as hostages to Samaria and Jerusalem. All the latter turned from idolaters into worshipers of the God of Israel (Tanna debe Eliyahu, i. 9). Each of his seventy sons had an ivory palace built for him. Since, however, it was Ahab's idolatrous wife who was the chief instigator of his crimes (B. M. 59a), some of the ancient teachers gave him the same position in the world to come as a sinner who had repented (Sanh. 104b, Num. R. xiv). Like Manasseh, he was made a type of repentance (I Kings, xxi. 29). Accordingly, he is described as undergoing fasts and penances for a long time; praying thrice a day to God for forgiveness, until his prayer was heard (PirḲe R. El. xliii). Hence, the name of Ahab in the list of wicked kings was changed to Ahaz (Yer. Sanh. x. 28b; Tanna debe Eliyahu Rabba ix, Zuṭṭa xxiv.). Pseudo-Epiphanius ("Opera," ii. 245) makes Micah an Ephraimite. Confounding him with Micaiah, son of Imlah, he states that Micah, for his inauspicious prophecy, was killed by order of Ahab through being thrown from a precipice, and was buried at Morathi (Maroth?; Mic. i. 12), near the cemetery of Enakim (Ένακεὶμ Septuagint rendering of ; ib. i. 10). According to "Gelilot Ereẓ Yisrael" (quoted in "Seder ha-Dorot," i. 118, Warsaw, 1889), Micah was buried in Chesil, a town in southern Judah (Josh. xv. 30). Naboth's soul was the lying spirit that was permitted to deceive Ahab to his death. In popular culture Ahab is portrayed by Eduard Franz in the film Sins of Jezebel (1953). He is also the namesake of Captain Ahab in Moby Dick. See also List of biblical figures identified in extra-biblical sources Explanatory notes Citations General and cited references Eeternal links 850s BC deaths 9th-century BC biblical rulers 9th-century BC Kings of Israel Deaths by arrow wounds Monarchs killed in action Omrides Year of birth unknown

1391

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

ASIC (disambiguation)

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

1392

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

Dasyproctidae

Dasyproctidae is a family of large South American rodents, comprising the agoutis and acouchis. Their fur is a reddish or dark colour above, with a paler underside. They are herbivorous, often feeding on ripe fruit that falls from trees. They live in burrows, and, like squirrels, will bury some of their food for later use. Dasyproctids exist in Central and South America, which are the tropical parts of the New World. The fossil record of this family can be traced back to the Late Oligocene (Deseadan in the SALMA classification). As with all rodents, members of this family have incisors, pre-molars, and molars, but no canines. The cheek teeth are hypsodont and flat-crowned. Classification Fossil taxa follow McKenna and Bell, with modifications following Kramarz. Family Dasyproctidae Genus †Alloiomys Genus †Australoprocta Genus †Branisamys Genus †Incamys Genus †Neoreomys Genus †Megastus Genus †Palmiramys Genus Dasyprocta Azara's agouti, D. azarae Coiban agouti, D. coibae Crested agouti, D. cristata Black agouti, D. fuliginosa Orinoco agouti, D. guamara Kalinowski's agouti, D. kalinowskii Red-rumped agouti, D. leporina Mexican agouti, D. mexicana Black-rumped agouti, D. prymnolopha Central American agouti, D. punctata Ruatan Island agouti, D. ruatanica Genus Myoprocta Green acouchi, M. pratti Red acouchi, M. acouchy The pacas (genus Cuniculus) are placed by some authorities in Dasyproctidae, but molecular studies have demonstrated they do not form a monophyletic group. References External links Central American agouti at Smithsonian Dasyproctidae at Animaldiversity.org 2014 - Figueira et al. - Carrion consumption by Dasyprocta leporina (Rodentia: Dasyproctidae) and a review of meat use by agoutis Hystricognath rodents Rodent families Extant Chattian first appearances Mammals described in 1825

1394

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

Algol

Algol , designated Beta Persei (β Persei, abbreviated Beta Per, β Per), known colloquially as the Demon Star, is a bright multiple star in the constellation of Perseus and one of the first non-nova variable stars to be discovered. Algol is a three-star system, consisting of Beta Persei Aa1, Aa2, and Ab – in which the hot luminous primary β Persei Aa1 and the larger, but cooler and fainter, β Persei Aa2 regularly pass in front of each other, causing eclipses. Thus Algol's magnitude is usually near-constant at 2.1, but regularly dips to 3.4 every 2.86 days during the roughly 10-hour-long partial eclipses. The secondary eclipse when the brighter primary star occults the fainter secondary is very shallow and can only be detected photoelectrically. Algol gives its name to its class of eclipsing variable, known as Algol variables. Observation history An ancient Egyptian calendar of lucky and unlucky days composed some 3,200 years ago is said to be the oldest historical documentation of the discovery of Algol. The association of Algol with a demon-like creature (Gorgon in the Greek tradition, ghoul in the Arabic tradition) suggests that its variability was known long before the 17th century, but there is still no indisputable evidence for this. The Arabic astronomer al-Sufi said nothing about any variability of the star in his Book of Fixed Stars published c.964. The variability of Algol was noted in 1667 by Italian astronomer Geminiano Montanari, but the periodic nature of its variations in brightness was not recognized until more than a century later, when the British amateur astronomer John Goodricke also proposed a mechanism for the star's variability. In May 1783, he presented his findings to the Royal Society, suggesting that the periodic variability was caused by a dark body passing in front of the star (or else that the star itself has a darker region that is periodically turned toward the Earth). For his report he was awarded the Copley Medal. In 1881, the Harvard astronomer Edward Charles Pickering presented evidence that Algol was actually an eclipsing binary. This was confirmed a few years later, in 1889, when the Potsdam astronomer Hermann Carl Vogel found periodic doppler shifts in the spectrum of Algol, inferring variations in the radial velocity of this binary system. Thus Algol became one of the first known spectroscopic binaries. Joel Stebbins at the University of Illinois Observatory used an early selenium cell photometer to produce the first-ever photoelectric study of a variable star. The light curve revealed the second minimum and the reflection effect between the two stars. Some difficulties in explaining the observed spectroscopic features led to the conjecture that a third star may be present in the system; four decades later this conjecture was found to be correct. Listed are the first eclipse dates and times of each month; all times in UT. β Persei Aa2 eclipses β Persei Aa1 every 2.867321 days (2 days 20 hours 49 min); therefore keep adding that much to each date and time to get the following eclipses. For example, the Jan 3, 21h, eclipse will yield consecutive eclipse times on Jan 6, 18h, then Jan 9, 15h, then Jan 12, 12h, etc. (all times approximate). System Algol is a multiple-star system with three confirmed and two suspected stellar components. From the point of view of the Earth, Algol Aa1 and Algol Aa2 form an eclipsing binary because their orbital plane contains the line of sight to the Earth. The eclipsing binary pair is separated by only 0.062 astronomical units (au) from each other, whereas the third star in the system (Algol Ab) is at an average distance of 2.69 au from the pair, and the mutual orbital period of the trio is 681 Earth days. The total mass of the system is about 5.8 solar masses, and the mass ratios of Aa1, Aa2, and Ab are about 4.5 to 1 to 2. The three components of the bright triple star used to be, and still sometimes are, referred to as β Per A, B, and C. The Washington Double Star Catalog lists them as Aa1, Aa2, and Ab, with two very faint stars B and C about one arcmin distant. A further five faint stars are also listed as companions. The close pair consists of a B8 main sequence star and a much less massive K0 subgiant, which is highly distorted by the more massive star. These two orbit every 2.9 days and undergo the eclipses that cause Algol to vary in brightness. The third star orbits these two every 680 days and is an A or F-type main sequence star. It has been classified as an Am star, but this is now considered doubtful. Studies of Algol led to the Algol paradox in the theory of stellar evolution: although components of a binary star form at the same time, and massive stars evolve much faster than the less massive stars, the more massive component Algol Aa1 is still in the main sequence, but the less massive Algol Aa2 is a subgiant star at a later evolutionary stage. The paradox can be solved by mass transfer: when the more massive star became a subgiant, it filled its Roche lobe, and most of the mass was transferred to the other star, which is still in the main sequence. In some binaries similar to Algol, a gas flow can be seen. The gas flow between the primary and secondary stars in Algol has been imaged using Doppler Tomography. This system also exhibits x-ray and radio wave flares. The x-ray flares are thought to be caused by the magnetic fields of the A and B components interacting with the mass transfer. The radio-wave flares might be created by magnetic cycles similar to those of sunspots, but because the magnetic fields of these stars are up to ten times stronger than the field of the Sun, these radio flares are more powerful and more persistent. The secondary component was identified as the radio emitting source in Algol using Very-long-baseline interferometry by Lestrade and co-authors. Magnetic activity cycles in the chromospherically active secondary component induce changes in its radius of gyration that have been linked to recurrent orbital period variations on the order of  ≈  via the Applegate mechanism. Mass transfer between the components is small in the Algol system but could be a significant source of period change in other Algol-type binaries. Algol is about 92.8 light-years from the Sun, but about 7.3 million years ago it passed within 9.8 light-years of the Solar System and its apparent magnitude was about −2.5, which is considerably brighter than the star Sirius is today. Because the total mass of the Algol system is about 5.8 solar masses, at the closest approach this might have given enough gravity to perturb the Oort cloud of the Solar System somewhat and hence increase the number of comets entering the inner Solar System. However, the actual increase in net cometary collisions is thought to have been quite small. Names Beta Persei is the star's Bayer designation. The name Algol derives from Arabic raʾs al-ghūl : head (raʾs) of the ogre (al-ghūl) (see "ghoul"). The English name Demon Star was taken from the Arabic name. In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN) to catalog and standardize proper names for stars. The WGSN's first bulletin of July 2016 included a table of the first two batches of names approved by the WGSN; which included Algol for this star. It is so entered on the IAU Catalog of Star Names. In Hebrew folklore, Algol was called Rōsh ha Sāṭān or "Satan's Head", as stated by Edmund Chilmead, who called it "Divels head" or Rosch hassatan. A Latin name for Algol from the 16th century was Caput Larvae or "the Spectre's Head". Hipparchus and Pliny made this a separate, though connected, constellation. In Chinese, (), meaning Mausoleum, refers to an asterism consisting of β Persei, 9 Persei, τ Persei, ι Persei, κ Persei, ρ Persei, 16 Persei and 12 Persei. Consequently, the Chinese name for β Persei itself is (, English: The Fifth Star of Mausoleum.). According to R.H. Allen the star bore the grim name of Tseih She (), meaning "Piled up Corpses" but this appears to be a misidentification, and Dié Shī is correctly π Persei, which is inside the Mausoleum. Cultural significance Historically, the star has received a strong association with bloody violence across a wide variety of cultures. In the Tetrabiblos, the 2nd-century astrological text of the Alexandrian astronomer Ptolemy, Algol is referred to as "the Gorgon of Perseus" and associated with death by decapitation: a theme which mirrors the myth of the hero Perseus's victory over the snake-haired Gorgon Medusa. In the astrology of fixed stars, Algol is considered one of the unluckiest stars in the sky, and was listed as one of the 15 Behenian stars. See also Jaana Toivari-Viitala, egyptologist who contributed to understanding Ancient Egypt and the star References External links Algol variables Persei, Beta B-type main-sequence stars Persei, 26 019356 014576 K-type subgiants Perseus (constellation) Algol Triple star systems Astronomical objects known since antiquity 0936 BD+40 0673 Am stars F-type main-sequence stars