1961-1974

(1942-)

   Noted Portuguese novelist and writer, chronicler of his people's various responses to the colonial African wars (1961-75) and to the Revolution of Carnations 1974-75. Born in Lisbon, the son of a physician, Lobo Antunes was trained as a doctor as well and became a practicing psychiatrist. During the so-called "African Wars," when Portugal under the Estado Novo fought to retain its African colonies, Lobo Antunes served four years in the Portuguese Army in Angola. One of the literary results of that formative experience was his noted novel, South of Nowhere, published first in Portugal and then published and acclaimed in an English translation in 1983. Among his other novels also translated into English and published by major trade houses in the Anglophone world are An Explanation of the Birds (1991), Fado Alexandrino (1990), and Act of the Damned (1993).

    See also Literature.

   Portugal did not produce an artist of sufficient ability to gain recognition outside the country until the 19th century. Domingos Antônio Segueira (1768-1837) became well known in Europe for his allegorical religious and historical paintings in a neoclassical style. Portuguese painting during the 19th century emphasized naturalism and did not keep abreast of artistic innovations being made in other European countries. Portugal's best painters lived abroad especially in France. The most successful was Amadeo Souza- Cardoso who, while living in Paris, worked with the modernists Modigliani, Georges Braque, and Juan Gris. Souza-Cardoso introduced modernism into Portuguese painting in the early 20th century. A sustained modernist movement did not develop in Portugal, however. Naturalism remained the dominant school, and Portugal remained isolated from international artistic trends, owing to Portugal's conservative artistic climate, which prevented new forms of art from taking root, and the lack of support from an artistically sophisticated, art-buying elite supported by a system of galleries and foundations.

   Interestingly, it was during the conservative Estado Novo that modernism began to take root in Portugal. As Prime Minister Antônio de Oliveira Salazar's secretary for national propaganda, Antônio Ferro, a writer, journalist, and cultural leader who admired Mussolini, encouraged the government to allow modern artists to create the heroic imagery of the Estado Novo following the Italian model that linked fascism with futurism. The most important Portuguese artist of this period was Almada Negreiros, who did the murals on the walls of the legendary café A Brasileira in the Chiado district of Lisbon, the paintings at the Exposition of the Portuguese World (1940), and murals at the Lisbon docks. Other artists of note during this period included Mário Eloy (1900-51), who was trained in Germany and influenced by George Grosz and Otto Dix; Domingos Alvarez (1906-42); and Antônio Pedro (1909-66).

   During the 1950s, the Estado Novo ceased to encourage artists to collaborate, as Portuguese artists became more critical of the regime. The return to Portugal of Antônio Pedro in 1947 led to the emergence of a school of geometric abstract painting in Oporto and the reawakening of surrealism. The art deco styles of the 1930s gave way to surrealism and abstract expression.

   In the 1960s, links between Portugal's artistic community and the international art world strengthened. Conscription for the wars against the nationalist insurgencies in Angola, Mozambique, and Guinea- Bissau (1961-75) resulted in a massive exodus of Portugal's avante-garde artists to Europe to avoid military service. While abroad, artists such as Joaquin Rodrigo (1912-93), Paula Rego (1935-), João Cutileiro (1947-), and others forged links with British, French, Italian, and Spanish artistic communities.

   The Revolution of 25 April 1974 created a crisis for Portugal's artists. The market for works of art collapsed as left-wing governments, claiming that they had more important things to do (eliminate poverty, improve education), withdrew support for the arts. Artists declared their talents to be at the "service of the people," and a brief period of socialist realism prevailed. With the return of political stability and moderate governments during the 1980s, Portugal's commercial art scene revived, and a new period of creativity began. Disenchantment with the socialist realism (utopianism) of the Revolution and a deepening of individualism began to be expressed by Portuguese artists. Investment in the arts became a means of demonstrating one's wealth and social status, and an unprecedented number of art galleries opened, art auctions were held, and a new generation of artists became internationally recognized. In 1984, a museum of modern art was built by the Gulbenkian Foundation adjacent to its offices on the Avenida de Berna in Lisbon. A national museum of modern art was finally built in Oporto in 1988.

   In the 1980s, Portugal's new generation of painters blended post-conceptualism and subjectivism, as well as a tendency toward decon-structionism/reconstructionism, in their work. Artists such as Cabrita Reis (1956-), Pedro Calapez (1953-), José Pedro Croft (1957-), Rui Sanches (1955-), and José de Guimarães (1949-) gained international recognition during this period. Guimarães crosses African art themes with Western art; Sarmento invokes images of film, culture, photography, American erotica, and pulp fiction toward sex, violence, and pleasure; Reis evolved from a painter to a maker of installation artist using chipboard, plaster, cloth, glass, and electrical and plumbing materials.

   From the end of the 20th century and during the early years of the 21st century, Portugal's art scene has been in a state of crisis brought on by a declining art trade and a withdrawal of financial support by conservative governments. Although not as serious as the collapse of the 1970s, the current situation has divided the Portuguese artistic community between those, such as Cerveira Pito and Leonel Moura, who advocate a return to using primitive, strongly textured techniques and others such as João Paulo Feliciano (1963-), who paint constructivist works that poke fun at the relationship between art, money, society, and the creative process. Thus, at the beginning of the 21st century, the factors that have prevented Portuguese art from achieving and sustaining international recognition (the absence of a strong art market, depending too much on official state support, and the individualistic nature of Portuguese art production) are still to be overcome.

(1906-1965)

   Pioneer air force advocate and pilot, senior officer who opposed the Estado Novo, and oppositionist candidate in the 1958 presidential elections. One of the young army lieutenants who participated in the 28 May 1926 coup that established the military dictatorship, Delgado was a loyal regime supporter during its early phase (1926-44) and into its middle phase (1944-58). An important advocate of civil aeronautics, as well as being a daring pilot in the army air force and assisting the Allies in the Azores in World War II, Delgado spent an important part of his career after 1943 outside Portugal.

   On missions abroad for the government and armed forces, Delgado came to oppose the dictatorship in the l950s. In 1958, he stood as the oppositionist candidate in the presidential elections, against regime candidate Admiral Américo Tomás. In the cities, Delgado received considerable popular support for his campaign, during which he and the coalition of varied political movements, including the Portuguese Communist Party (PCP) and Movement of Democratic Unity, were harassed by the regime police, PIDE. When the managed election results were "tallied," Delgado had won more than 25 percent, including heavy votes in the African colonies; this proved an embarrassment to the regime, which promptly altered electoral law so that universal male suffrage was replaced by a safer electoral college (1959).

   When legal means of opposition were closed to him, Delgado conspired with dissatisfied military officers who promised support but soon abandoned him. The government had him stripped of his job, rank, and career and, in 1959, fearing arrest by the PIDE, Delgado sought political asylum in the embassy of Brazil. Later he fled to South America and organized opposition to the regime, including liaisons and plotting with Henrique Galvão. Delgado traveled to Europe and North Africa to rally Portuguese oppositionists in exile and, in 1961-62, dabbled in coup plots. He had a role in the abortive coup at Beja, in January 1962. Brave to the extent of taking risks against hopeless odds, Delgado dreamed of instigating a popular uprising on his own.

   In 1965, along with his Brazilian secretary, Delgado kept an appointment with destiny on Portugal's Spanish frontier. Neither he nor his companion were seen alive again, and later their bodies were discovered in a shallow grave; investigations since have proved that they were murdered by PIDE agents in a botched kidnapping plot.

   When the true story of what happened to the "Brave General" was revealed in the world press, the opposition's resolve was strengthened and the Estado Novo's image reached a new low. Posthumously, General Delgado has been honored in numerous ways since the Revolution of 25 April 1974.

   Traditionally, Portugal has been a country with a history of emigration to foreign lands, as well as to the overseas empire. During the early centuries of empire, only relatively small numbers of Portuguese emigrated to reside permanently in its colonies. After the establishment of the second, largely Brazilian empire in the 17th century, however, greater numbers of Portuguese left to seek their fortunes outside Europe. It was only toward the end of the 19th century, however, that Portuguese emigration became a mass movement, at first, largely to Brazil. While Portuguese-speaking Brazil was by far the most popular destination for the majority of Portuguese emigrants in early modern and modern times, after 1830, the United States and later Venezuela also became common destinations.

   Portuguese emigration patterns have changed in the 20th century and, as the Portuguese historian and economist Oliveira Martins wrote before the turn of the century, Portuguese emigration rates are a kind of national barometer. Crises and related social, political, and economic conditions within Portugal, as well as the presence of established emigrant communities in various countries, emigration laws, and the world economy have combined to shape emigration rates and destinations.

   After World War II, Brazil no longer remained the favorite destination of the majority of Portuguese emigrants who left Portugal to improve their lives and standards of living. Beginning in the 1950s, and swelling into a massive stream in the 1960s and into the 1970s, most Portuguese emigrated to find work in France and, after the change in U.S. immigration laws in the mid-1960s, a steady stream went to North America, including Canada. The emigration figures here indicate that the most intensive emigration years coincided with excessive political turmoil and severe draft (army conscription) laws during the First Republic (1912 was the high point), that emigration dropped during World Wars I and II and during economic downturns such as the Depression, and that the largest flow of Portuguese emigration in history occurred after the onset of the African colonial wars (1961) and into the 1970s, as Portuguese sought emigration as a way to avoid conscription or assignment to Africa.

   1887 17,000

   1900ca. 17,000 (mainly to Brazil)

   1910 39,000

   1912 88,000 (75,000 of these to Brazil)

   1930ca. 30,000 (Great Depression)

   1940ca. 8,800

   1950 41,000

   1955 57,000

   1960 67,000

   1965 131,000

   1970 209,000

    Portuguese Emigration Overseas ( figures rounded off; does not include illegal emigration)

   Despite considerable efforts by Lisbon to divert the stream of emigrants from Brazil or France to the African territories of Angola and Mozambique, this colonization effort failed, and most Portuguese who left Portugal preferred the better pay and security of jobs in France and West Germany or in the United States, Venezuela, and Brazil, where there were more deeply rooted Portuguese emigrant communities. At the time of the Revolution of 25 April 1974, when the military coup in Lisbon signaled the beginning of pressures for the Portuguese settlers to leave Africa, the total number of Portuguese resident in the two larger African territories amounted to about 600,000. In modern times, nonimperial Portuguese emigration has prevailed over imperial emigration and has had a significant impact on Portugal's annual budget (due to emigrants' remittances), the political system (since emigrants have a degree of absentee voting rights), investment and economy, and culture.

   A total of 4 million Portuguese reside and work outside Portugal as of 2009, over one-third of the country's continental and island population. It has also been said that more Portuguese of Azorean descent reside outside the Azores than in the Azores. The following statistics reflect the pattern of Portuguese emigrant communities in the world outside the mother country.

   Overseas Portuguese Communities Population Figures by Country of Residence ( estimates for 2002)

   Brazil 1,000,000

   France 650,000

   S. Africa 600,000

   USA 500,000

   Canada 400,000

   Venezuela 400,000

   W. Europe 175,000 (besides France and Germany)

   Germany 125,000

   Britain (UK) 60,000 (including Channel Islands)

   Lusophone Africa 50,000

   Australia 50,000

   Total: 4,010,000 (estimate)

   An anthropological and sociol ogical theory or complex of ideas allegedly showing a process of civilization relating to the significance of Portuguese activity in the tropics of Africa, Asia, and the Americas since 1415. As a theory and method of social science analysis, Luso-Tropicalism is a 20th-century phenomenon that has both academic and political (foreign and colonial policy) relevance. While the theory was based in part on French concepts of the "science of tropicology" in anthropology, it was Gilberto Freyre, an eminent Brazilian sociologist-anthropologist, who developed Luso-Tropicalism as an academic theory of the unique qualities of the Portuguese style of imperial activity in the tropics. In lectures, articles, and books during the period 1930-60, Freyre coined the term Luso-Tropicalism to describe Portuguese civilization in the tropics and to claim that the Portuguese, more than any other European colonizing people, successfully adapted their civilization to the tropics.

   From 1960 on, the academic theory was co-opted to lend credence to Portugal's colonial policy and determination to continue colonial rule in her large, remaining African empire. Freyre's Luso-Tropicalism theme was featured in the elaborate Fifth Centenary of the Death of Prince Henry the Navigator celebrations held in Lisbon in 1960 and in a massive series of publications produced in the 1960s to defend Portugal's policies in its empire, the first to be established and the last to decolonize in the Third World. Freyre's academic theory and his international prestige as a scholar who had put the sociology of Brazil on the world map were eagerly adopted and adapted by the Estado Novo. A major thesis of this interesting but somewhat disorganized mass of material was that the Portuguese were less racist and prejudiced toward the tropical peoples they encountered than were other Europeans.

   As African wars of insurgency began in Portugal's empire during 1961-64, and as the United Nations put pressures on Portugal, Luso-Tropicalism was tested and contested not only in academia and the press, but in international politics and diplomacy. Following the decolonization of Portugal's empire during 1974 and 1975 (although Macau remained the last colony to the late 1990s), debate over the notion of Luso-Tropicalism died down. With the onset of the 500-year anniversary celebrations of the Portuguese Age of Discoveries and Exploration, beginning in 1988, however, a whiff of the essence of Luso- Tropicalism reappeared in selected aspects of the commemorative literature.

    See also Commemorations, Portuguese historic.

(NATO)

   Portugal joined the North Atlantic Treaty Organization in 1949, as a founding member. Besides complementing the Atlantic orientation of Portugal's foreign and defense policies, this membership also supported the country's close relationship with two leading members of NATO, Great Britain and the United States. Portugal's slight contribution to NATO in the first decades after joining was conditioned mainly by the fact that Portugal's primary concern was in defending its colonial empire, Portuguese India (1954-61) and in conducting several colonial wars in its African empire in Angola, Mozambique, and Guinea- Bissau (1961-74). One contentious question during this phase of Portugal's membership was the extent to which Portugal used NATO-issued equipment to fight those wars in Africa and Asia, since several of these colonial territories were neither on the Atlantic nor in NATO's jurisdiction (Mozambique and Portuguese India).

   The perceived strategic value of Portugal's key Atlantic archipelagos, the Azores and Madeiras, constituted Portugal's primary contribution to NATO and neutralized any U.S. ambivalence about the question of Portugal's NATO membership. The usefulness of Azores' air and naval bases, especially Lajes base at Angra do Heroísmo, Terceira Island, Azores, along with bases in continental Portugal and in the Madeira Islands, trumped international criticism of Portugal's colonial action and influenced American policy toward Portugal. This remained the situation until after the Yom Kippur war, an Arab-Israeli conflict, in October 1973, when Portugal, despite the risks to her energy supplies, gave the United States permission to use Azores bases for resupplying Israel.

   The Revolution of 25 April 1974 had an impact on Portugal's relationship to NATO. Leftist forces in Portugal were now in command, and Portuguese NATO delegates did not attend highly sensitive NATO defense briefings. But by 1980, after moderate military forces had ousted the radical leftists, Portugal's NATO roles returned to the routing. One of NATO's major subordinate commands became IBERLANT (Iberian Atlantic Command), under SACLANT (Supreme Commander Atlantic), located at Norfolk, Virginia. IBERLANT is located at Oeiras, Portugal and, in 1982, the IBERLAND commander for the first time was a Portuguese Vice Admiral. That same year, Spain joined NATO and, until 1986, when Spain decided not to join NATO's integrated military structure, Portugal was anxious that Portuguese commanders not be subordinate to Spanish commanders in NATO. As a key leader of IBERLANT, along with the representative units of Great Britain and the United States, Portugal's forces remain responsible for surveillance and patrolling of the area from central Portugal to the straits of Gibraltar.

   Portugal has made symbolic if modest contributions to NATO's mission in the Balkan conflicts beginning in the late 1990s and in Afghanistan since 2001. Among Portugal's contributions has been the service of medical units in Afghanistan.

    See also Armed forces; Great Britain; United States of America.

(1946-)

   Portuguese academic, writer, and politician. A student at Lisbon's Pedro Nunes High School, Rosas joined the Portuguese Communist Party (PCP) through an organization at that school in 1961. He entered Lisbon University's Law School and, as a militant leftist student, was arrested and imprisoned by the political police, PIDE, on several occasions in 1965, 1971, and 1973. He went underground to escape further arrest and prison until the Revolution of 25 April 1974. After he had broken with the PCP following the Paris student riots of May 1968 and the Soviet invasion of Czechoslovakia, Rosas joined a Maoist organization and directed a radical newspaper, Luta Popular (People's Struggle).

   Rosas returned to university study in 1981, producing a great deal of journalism oriented to historical studies in major Lisbon newspapers such as Diário de Notícias and Público. In 1986, he received a master's degree in contemporary history and joined the human and social sciences faculty at the New University of Lisbon. In 1990, he completed his Ph.D. in history and became president of the Instituto de Historia Contemporanea, a consultant for the Mário Soares Foundation, and editor of História magazine. In 1999, he reentered politics and helped establish a party coalition, Left Bloc or Bloco de Esquerda (BE); in the 2001 presidential elections he ran as a candidate for the BE, garnering only 2.9 percent of the vote.

   In 2006, he was decorated by the president of the republic with a medal, as Commander of the Great Cross, Order of Liberty. An authority on the subject of 20th-century political and economic history, especially on the period of the Estado Novo, he is the author, coauthor, or editor of more than a dozen books and many scores of articles and chapters in newspapers and scholarly and popular journals and magazines, and he has been active in organizing international scholarly conferences.

SUBJECT AREA: Aerospace

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Cayley was born into a well-to-do Yorkshire family living at Brompton Hall. He was encouraged to study mathematics, navigation and mechanics, particularly by his mother. In 1792 he succeeded to the baronetcy and took over the daunting task of revitalizing the run-down family estate.

The first aeronautical device made by Cayley was a copy of the toy helicopter invented by the Frenchmen Launoy and Bienvenu in 1784. Cayley's version, made in 1796, convinced him that a machine could "rise in the air by mechanical means", as he later wrote. He studied the aerodynamics of flight and broke away from the unsuccessful ornithopters of his predecessors. In 1799 he scratched two sketches on a silver disc: one side of the disc showed the aerodynamic force on a wing resolved into lift and drag, and on the other side he illustrated his idea for a fixed-wing aeroplane; this disc is preserved in the Science Museum in London. In 1804 he tested a small wing on the end of a whirling arm to measure its lifting power. This led to the world's first model glider, which consisted of a simple kite (the wing) mounted on a pole with an adjustable cruciform tail. A full-size glider followed in 1809 and this flew successfully unmanned. By 1809 Cayley had also investigated the lifting properties of cambered wings and produced a low-drag aerofoil section. His aim was to produce a powered aeroplane, but no suitable engines were available. Steam-engines were too heavy, but he experimented with a gunpowder motor and invented the hot-air engine in 1807. He published details of some of his aeronautical researches in 1809–10 and in 1816 he wrote a paper on airships. Then for a period of some twenty-five years he was so busy with other activities that he largely neglected his aeronautical researches. It was not until 1843, at the age of 70, that he really had time to pursue his quest for flight. The Mechanics' Magazine of 8 April 1843 published drawings of "Sir George Cayley's Aerial Carriage", which consisted of a helicopter design with four circular lifting rotors—which could be adjusted to become wings—and two pusher propellers. In 1849 he built a full-size triplane glider which lifted a boy off the ground for a brief hop. Then in 1852 he proposed a monoplane glider which could be launched from a balloon. Late in 1853 Cayley built his "new flyer", another monoplane glider, which carried his coachman as a reluctant passenger across a dale at Brompton, Cayley became involved in public affairs and was MP for Scarborough in 1832. He also took a leading part in local scientific activities and was co-founder of the British Association for the Advancement of Science in 1831 and of the Regent Street Polytechnic Institution in 1838.

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SUBJECT AREA: Medical technology

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During his medical training at Manchester he qualified for the Fellowship of the Royal College of Surgeons and obtained his FRCS in 1936, within a year of becoming medically qualified. Following military service as an orthopaedic specialist, he was appointed a consultant at the Manchester Royal Infirmary in 1947.

Charnley investigated the problems of joint lubrication using polytetrafluoroethylene (PTFE) and a series of 300 initially successful cases laid the foundation for further developments, involving total hip-joint replacement, when in 1962 high-density polythene became available as a suitable inert material. The need for a totally sterile operating environment in which to carry out such procedures led him to develop ultra-clean-air operating-theatre modules which proved to have wide application in relation to other surgical disciplines and to the problems of hospital building. To further these principles he resigned from the Royal Infirmary and was the guiding spirit in the establishment of the centre for hip surgery at Wrightington Hospital in Lancashire, which gained wide international recognition.

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SUBJECT AREA: Electronics and information technology

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Born on a cattle ranch, Forrester obtained a BSc in electrical engineering at the University of Nebraska in 1939 and his MSc at the Massachusetts Institute of Technology (MIT) in Cambridge, Massachusetts, where he remained to teach and carry out research. Becoming interested in computing, he established the Digital Computer Laboratory at MIT in 1945 and became involved in the construction of Whirlwind I, an early general-purpose computer completed in March 1951 and used for flight-simulation by the US Army Air Force. Finding the linear memories then available for storing data a major limiting factor in the speed at which computers were able to operate, he developed a three-dimensional store based on the binary switching of the state of small magnetic cores that could be addressed and switched by a matrix of wires carrying pulses of current. The machine used parallel synchronous fixed-point computing, with fifteen binary digits and a plus sign, i.e. 16 bits in all, and contained 5,000 vacuum tubes, eleven semiconductors and a 2 MHz clock for the arithmetic logic unit. It occupied a two-storey building and consumed 150kW of electricity. From his experience with the development and use of computers, he came to realize their great potential for the simulation and modelling of real situations and hence for the solution of a variety of management problems, using data communications and the technique now known as interactive graphics. His later career was therefore in this field, first at the MIT Lincoln Laboratory in Lexington, Massachusetts (1951) and subsequently (from 1956) as Professor at the Sloan School of Management at the Massachusetts Institute of Technology.

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See also: Burks, Arthur Walter; Goldstine, Herman H.; Wilkes, Maurice Vincent; Williams, Sir Frederic Calland

SUBJECT AREA: Domestic appliances and interiors, Electricity, Electronics and information technology

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Lovelock was brought up in Brixton in modest circumstances. At the age of 4 he was given a toy electrical set, which first turned his attention towards the study of science. From the Strand School, Brixton, he went on to the universities of Manchester and London, and after graduating in science, in 1941 he joined the National Institute for Medical Research, Mill Hill, as a staff scientist, remaining there for twenty years. During the early 1950s, he and his colleagues were engaged in research into freezing live animals and bringing them back to life by heating: Lovelock was struck by the intense pain this process caused the animals, and he sought a more humane method. He tried diathermy or internal heating through the effect of a continuous wave magnetron borrowed from the Navy. He found that the animals were brought back to life painlessly, and impressed with his success he tried baking a potato for his lunch in the apparatus and found that it cooked amazingly quickly compared with the one hour normally needed in an ordinary oven. Lovelock had invented the microwave oven, but its commercial possibilities were not at first realized.

In the late 1950s he invented the electron capture detector, which proved to be more sensitive than any other analytical equipment in detecting and measuring toxic substances. The apparatus therefore had obvious uses in testing the quality of the environment and so offered a tremendous boost to the "green" movement. In 1961 he was invited to joint the US National Aeronautics and Space Administration (NASA) to employ the apparatus in an attempt to detect life in space.

In the early 1970s Lovelock relinquished his biological work in order to devote his attention to philosophical matters, specifically to develop his theory of the Universe, now widely celebrated as the "Gaia theory". In this controversial theory, Lovelock regards our planet and all its living beings, including humans, as a single living organism.

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SUBJECT AREA: Aerospace

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Major von Parseval and his colleague Captain von Sigsfeld were serving in the German army during the 1890s when improved military observation from the air was being pursued. Tethered observation balloons, raised and lowered by a winch, had been used since 1794, but in strong winds a spherical balloon became very unstable. Manned kites were being developed by "Colonel" S.F. Cody, in Britain, and others, but kites were a problem if the wind dropped. A very successful compromise was achieved in 1897 by von Parseval and von Sigsfeld, who developed a kite-balloon, the Drachen ("Dragon"), which was elongated like an airship and fitted with large inflated fins. It was attached to its tethering cable in such a way that it flew with a positive incidence (nose up) to the wind, thus producing some lift—like a kite. The combination of these factors made the kite-balloon very stable. Other countries followed suit and a version designed by the Frenchman Albert Caquot was widely used during the First World War for observing the results of artillery fire. Caquot balloons were also used around London as a barrage to obstruct enemy aircraft, and "barrage balloons" were widely used during the Second World War. After working at a government balloon factory in Berlin where non-rigid airships were built, von Parseval designed his own non-rigid airship. The Parseval I which flew in 1906 was small, but larger and faster non-rigids followed. These were built by Luftfahrzeug-Gesellschaft m.b.H. of Berlin founded in 1908 to build and operate Parseval airships. The British Admiralty ordered three Parseval airships, two to be built by Vickers of Barrow (who had built the rigid airship R 1 Mayfly in 1911), and one to be built in Berlin. This one was flown from Berlin to Farnborough in 1913 and joined the Vickers-built Parseval in the Naval Air Service. During the First World War, Parseval airships had the unique distinction of serving on both sides. Three small Parseval airships were built between 1929 and 1932 for use in advertising.

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SUBJECT AREA: Electronics and information technology, Recording

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D.T.N.Williamson was educated at George Heriot's School, Edinburgh, and studied mechanical engineering at the University of Edinburgh and electrical engineering at Heriot-Watt College (now Heriot-Watt University), Edinburgh. He joined the MO Valve Company in London in 1943 and worked in his spare time on improving the sound reproduction for gramophones, and in 1946 invented the "Williamson Amplifier".

That same year Williamson returned to Edinburgh as a development engineer with Ferranti Ltd, where he was employed in developing computer-controlled machining systems. In 1961 he was appointed Director of Research and Development at Molins Ltd, where he continued work on computer-controlled machine tools. He invented the Molins System 24, which employed a number of machine tools, all under computer control, and is generally acknowledged as a significant step in the development of manufacturing systems. In 1974 he joined Rank Xerox and became Director of Research before taking early retirement to live in Italy. Between 1954 and 1979 he served on numerous committees relating to computer-aided design, manufacturing technology and mechanical engineering in general.

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тест Амеса
Разработан Bruce Ames в 1961; тест оценивает мутагенез в бактериальной ДНК, его результаты можно применить и для компонентов, употребляемых человеком
[ http://www.dunwoodypress.com/148/PDF/Biotech_Eng-Rus.pdf]

Тематики

• биотехнологии

EN

• Ames test

 

тест Эймса
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[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]

EN

Ames test
A bioassay developed by Bruce N. Ames in 1974, performed on bacteria to assess the capability of environmental chemicals to cause mutations. (Source: BIOTGL / KORENa)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]

Тематики

• охрана окружающей среды

EN

• Ames test

DE

• AMES-Test

FR

• test de Ames