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  • 81 Breuer, Marcel Lajos

    [br]
    b. 22 May 1902 Pécs, Hungary
    d. 1 July 1981 New York (?), USA
    [br]
    Hungarian member of the European Bauhaus generation in the 1920s, who went on to become a leader in the modern school of architectural and furniture design in Europe and the United States.
    [br]
    Breuer began his student days following an art course in Vienna, but joined the Bauhaus at Weimar, where he later graduated, in 1920. When Gropius re-established the school in purpose-built structures at Dessau, Breuer became a member of the teaching staff in charge of the carpentry and furniture workshops. Much of his time there was spent in design and research into new materials being applied to furniture and interior decoration. The essence of his contribution was to relate the design of furniture to industrial production; in this field he developed the tubular-steel structure, especially in chair design, and experimented with aluminium as a furniture material as well as pieces of furniture made up from modular units. His furniture style was characterized by an elegance of line and a careful avoidance of superfluous detail. By 1926 he had furnished the Bauhaus with such furniture in chromium-plated steel, and two years later had developed a cantilevered chair.
    Breuer left the Bauhaus in 1928 and set up an architectural practice in Berlin. In the early 1930s he also spent some time in Switzerland. Notable from these years was his Harnischmacher Haus in Wiesbaden and his apartment buildings in the Dolderthal area of Zurich. His architectural work was at first influenced by constructivism, and then by that of Le Corbusier (see Charles-Edouard Jeanneret). In 1935 he moved to England, where in partnership with F.R.S. Yorke he built some houses and continued to practise furniture design. The Isokon Furniture Co. commissioned him to develop ideas that took advantage of the new bending and moulding processes in laminated wood, one result being his much-copied reclining chair.
    In 1937, like so many of the European architectural refugees from Nazism, he found himself under-occupied due to the reluctance of English clients to embrace the modern architectural movement. He went to the United States at Gropius's invitation to join him as a professor at Harvard. Breuer and Gropius were influential in training a new generation of American architects, and in particular they built a number of houses. This partnership ended in 1941 and Breuer set up practice in New York. His style of work from this time on was still modern, but became more varied. In housing, he adapted his style to American needs and used local materials in a functional manner. In the Whitney Museum (1966) he worked in a sculptural, granite-clad style. Often he utilized a bold reinforced-concrete form, as in his collaboration with Pier Luigi Nervi and Bernard Zehrfuss in the Paris UNESCO Building (1953–8) and the US Embassy in the Hague (1954–8). He displayed his masterly handling of poured concrete used in a strikingly expressionistic, sculptural manner in his St John's Abbey (1953–61) in Collegeville, Minnesota, and in 1973 his Church of St Francis de Sale in Michigan won him the top award of the American Institute of Architects.
    [br]
    Principal Honours and Distinctions
    American Institute of Architects Medal of Honour 1964, Gold Medal 1968. Jefferson Foundation Medal 1968.
    Bibliography
    1955, Sun and Shadow, the Philosophy of an Architect, New York: Dodd Read (autobiography).
    Further Reading
    C.Jones (ed.), 1963, Marcel Breuer: Buildings and Projects 1921–1961, New York: Praeger.
    T.Papachristou (ed.), 1970, Marcel Breuer: New Buildings and Projects 1960–1970, New York: Praeger.
    DY

    Biographical history of technology > Breuer, Marcel Lajos

  • 82 Brinell, Johann August

    SUBJECT AREA: Metallurgy
    [br]
    b. 1849 Småland, Sweden
    d. 17 November 1925 Stockholm, Sweden
    [br]
    Swedish metallurgist, inventor of the well-known method of hardness measurement which uses a steel-ball indenter.
    [br]
    Brinell graduated as an engineer from Boräs Technical School, and his interest in metallurgy began to develop in 1875 when he became an engineer at the ironworks of Lesjöfors and came under the influence of Gustaf Ekman. In 1882 he was appointed Chief Engineer at the Fagersta Ironworks, where he became one of Sweden's leading experts in the manufacture and heat treatment of tool steels.
    His reputation in this field was established in 1885 when he published a paper on the structural changes which occurred in steels when they were heated and cooled, and he was among the first to recognize and define the critical points of steel and their importance in heat treatment. Some of these preliminary findings were first exhibited at Stockholm in 1897. His exhibit at the World Exhibition at Paris in 1900 was far more detailed and there he displayed for the first time his method of hardness determination using a steel-ball indenter. For these contributions he was awarded the French Grand Prix and also the Polhem Prize of the Swedish Technical Society.
    He was later concerned with evaluating and developing the iron-ore deposits of north Sweden and was one of the pioneers of the electric blast-furnace. In 1903 he became Chief Engineer of the Jernkontoret and remained there until 1914. In this capacity and as Editor of the Jernkontorets Annaler he made significant contributions to Swedish metallurgy. His pioneer work on abrasion resistance, undertaken long before the term tribology had been invented, gained him the Rinman Medal, awarded by the Jernkontoret in 1920.
    [br]
    Principal Honours and Distinctions
    Member of the Swedish Academy of Science 1902. Dr Honoris Causa, University of Upsala 1907. French Grand Prix, Paris World Exhibition 1900; Swedish Technical Society Polhem Prize 1900; Iron and Steel Institute Bessemer Medal 1907; Jernkontorets Rinman Medal 1920.
    Further Reading
    Axel Wahlberg, 1901, Journal of the Iron and Steel Institute 59:243 (the first English-language description of the Brinell Hardness Test).
    Machinery's Encyclopedia, 1917, Vol. III, New York: Industrial Press, pp. 527–40 (a very readable account of the Brinell test in relation to the other hardness tests available at the beginning of the twentieth century).
    Hardness Test Research Committee, 1916, Bibliography on hardness testing, Proceedings of the Institution of Mechanical Engineers.
    ASD

    Biographical history of technology > Brinell, Johann August

  • 83 Elder, John

    [br]
    b. 9 March 1824 Glasgow, Scotland
    d. 17 September 1869 London, England
    [br]
    Scottish engineer who introduced the compound steam engine to ships and established an important shipbuilding company in Glasgow.
    [br]
    John was the third son of David Elder. The father came from a family of millwrights and moved to Glasgow where he worked for the well-known shipbuilding firm of Napier's and was involved with improving marine engines. John was educated at Glasgow High School and then for a while at the Department of Civil Engineering at Glasgow University, where he showed great aptitude for mathematics and drawing. He spent five years as an apprentice under Robert Napier followed by two short periods of activity as a pattern-maker first and then a draughtsman in England. He returned to Scotland in 1849 to become Chief Draughtsman to Napier, but in 1852 he left to become a partner with the Glasgow general engineering company of Randolph Elliott \& Co. Shortly after his induction (at the age of 28), the engineering firm was renamed Randolph Elder \& Co.; in 1868, when the partnership expired, it became known as John Elder \& Co. From the outset Elder, with his partner, Charles Randolph, approached mechanical (especially heat) engineering in a rigorous manner. Their knowledge and understanding of entropy ensured that engine design was not a hit-and-miss affair, but one governed by recognition of the importance of the new kinetic theory of heat and with it a proper understanding of thermodynamic principles, and by systematic development. In this Elder was joined by W.J.M. Rankine, Professor of Civil Engineering and Mechanics at Glasgow University, who helped him develop the compound marine engine. Elder and Randolph built up a series of patents, which guaranteed their company's commercial success and enabled them for a while to be the sole suppliers of compound steam reciprocating machinery. Their first such engine at sea was fitted in 1854 on the SS Brandon for the Limerick Steamship Company; the ship showed an improved performance by using a third less coal, which he was able to reduce still further on later designs.
    Elder developed steam jacketing and recognized that, with higher pressures, triple-expansion types would be even more economical. In 1862 he patented a design of quadruple-expansion engine with reheat between cylinders and advocated the importance of balancing reciprocating parts. The effect of his improvements was to greatly reduce fuel consumption so that long sea voyages became an economic reality.
    His yard soon reached dimensions then unequalled on the Clyde where he employed over 4,000 workers; Elder also was always interested in the social welfare of his labour force. In 1860 the engine shops were moved to the Govan Old Shipyard, and again in 1864 to the Fairfield Shipyard, about 1 mile (1.6 km) west on the south bank of the Clyde. At Fairfield, shipbuilding was commenced, and with the patents for compounding secure, much business was placed for many years by shipowners serving long-distance trades such as South America; the Pacific Steam Navigation Company took up his ideas for their ships. In later years the yard became known as the Fairfield Shipbuilding and Engineering Company Ltd, but it remains today as one of Britain's most efficient shipyards and is known now as Kvaerner Govan Ltd.
    In 1869, at the age of only 45, John Elder was unanimously elected President of the Institution of Engineers and Shipbuilders in Scotland; however, before taking office and giving his eagerly awaited presidential address, he died in London from liver disease. A large multitude attended his funeral and all the engineering shops were silent as his body, which had been brought back from London to Glasgow, was carried to its resting place. In 1857 Elder had married Isabella Ure, and on his death he left her a considerable fortune, which she used generously for Govan, for Glasgow and especially the University. In 1883 she endowed the world's first Chair of Naval Architecture at the University of Glasgow, an act which was reciprocated in 1901 when the University awarded her an LLD on the occasion of its 450th anniversary.
    [br]
    Principal Honours and Distinctions
    President, Institution of Engineers and Shipbuilders in Scotland 1869.
    Further Reading
    Obituary, 1869, Engineer 28.
    1889, The Dictionary of National Biography, London: Smith Elder \& Co. W.J.Macquorn Rankine, 1871, "Sketch of the life of John Elder" Transactions of the
    Institution of Engineers and Shipbuilders in Scotland.
    Maclehose, 1886, Memoirs and Portraits of a Hundred Glasgow Men.
    The Fairfield Shipbuilding and Engineering Works, 1909, London: Offices of Engineering.
    P.M.Walker, 1984, Song of the Clyde, A History of Clyde Shipbuilding, Cambridge: PSL.
    R.L.Hills, 1989, Power from Steam. A History of the Stationary Steam Engine, Cambridge: Cambridge University Press (covers Elder's contribution to the development of steam engines).
    RLH / FMW

    Biographical history of technology > Elder, John

  • 84 Kettering, Charles Franklin

    [br]
    b. 29 August 1876 near Londonsville, Ohio, USA
    d. 25 November 1958 Dayton, Ohio, USA
    [br]
    American engineer and inventor.
    [br]
    Kettering gained degrees in mechanical and electrical engineering from Ohio State University. He was employed by the National Construction Register (NCR) of Dayton, Ohio, where he devised an electric motor for use in cash registers. He became Head of the Inventions Department of that company but left in 1909 to form, with the former Works Manager of NCR, Edward A. Deeds, the Dayton Engineering Laboratories (later called Delco), to develop improved lighting and ignition systems for automobiles. In the first two years of the new company he produced not only these but also the first self-starter, both of which were fitted to the Cadillac, America's leading luxury car. In 1914 he founded Dayton Metal Products and the Dayton Wright Airplane Company. Two years later Delco was bought by General Motors. In 1925 the independent research facilities of Delco were moved to Detroit and merged with General Motors' laboratories to form General Motors Research Corporation, of which Kettering was President and General Manager. (He had been Vice-President of General Motors since 1920.) In that position he headed investigations into methods of achieving maximum engine performance as well as into the nature of friction and combustion. Many other developments in the automobile field were made under his leadership, such as engine coolers, variable-speed transmissions, balancing machines, the two-way shock absorber, high-octane fuel, leaded petrol or gasoline, fast-drying lacquers, crank-case ventilators, chrome plating, and the high-compression automobile engine. Among his other activities were the establishment of the Charles Franklin Kettering Foundation for the Study of Chlorophyll and Photosynthesis at Antioch College, and the founding of the Sloan- Kettering Institute for Cancer Research in New York City. He sponsored the Fever Therapy Research Project at Miami Valley Hospital at Dayton, which developed the hypertherm, or artificial fever machine, for use in the treatment of disease. He resigned from General Motors in 1947.
    IMcN

    Biographical history of technology > Kettering, Charles Franklin

  • 85 Rennie, John

    SUBJECT AREA: Canals, Civil engineering
    [br]
    b. 7 June 1761 Phantassie, East Linton, East Lothian, Scotland
    d. 4 October 1821 Stamford Street, London, England
    [br]
    Scottish civil engineer.
    [br]
    Born into a prosperous farming family, he early demonstrated his natural mechanical and structural aptitude. As a boy he spent a great deal of time, often as a truant, near his home in the workshop of Andrew Meikle. Meikle was a millwright and the inventor of a threshing machine. After local education and an apprenticeship with Meikle, Rennie went to Edinburgh University until he was 22. He then travelled south and met James Watt, who in 1784 offered him the post of Engineer at the Albion Flour Mills, London, which was then under construction. Rennie designed all the mill machinery, and it was while there that he began to develop an interest in canals, opening his own business in 1791 in Blackfriars. He carried out work on the Kennet and Avon Canal and in 1794 became Engineer for the company. He meanwhile carried out other surveys, including a proposed extension of the River Stort Navigation to the Little Ouse and a Basingstoke-to-Salisbury canal, neither of which were built. From 1791 he was also engaged on the Rochdale Canal and the Lancaster Canal, as well as the great masonry aqueduct carrying the latter canal across the river Lune at Lancaster. He also surveyed the Ipswich and Stowmarket and the Chelmer and Blackwater Navigations. He advised on the Horncastle Canal in 1799 and on the River Ancholme in 1799, both of which are in Lincolnshire. In 1802 he was engaged on the Royal Canal in Ireland, and in the same year he was commissioned by the Government to prepare a plan for flooding the Lea Valley as a defence on the eastern approach to London in case Napoleon invaded England across the Essex marshes. In 1809 he surveyed improvements on the Thames, and in the following year he was involved in a proposed canal from Taunton to Bristol. Some of his schemes, particularly in the Fens and Lincolnshire, were a combination of improvements for both drainage and navigation. Apart from his canal work he engaged extensively in the construction and development of docks and harbours including the East and West India Docks in London, Holyhead, Hull, Ramsgate and the dockyards at Chatham and Sheerness. In 1806 he proposed the great breakwater at Plymouth, where work commenced on 22 June 1811.
    He was also highly regarded for his bridge construction. These included Kelso and Musselburgh, as well as his famous Thames bridges: London Bridge (uncompleted at the time of his death), Waterloo Bridge (1810–17) and Southwark Bridge (1815–19). He was elected a Fellow of the Royal Society in 1798.
    [br]
    Principal Honours and Distinctions
    FRS 1798.
    Further Reading
    C.T.G.Boucher, 1963, John Rennie 1761–1821, Manchester University Press. W.Reyburn, 1972, Bridge Across the Atlantic, London: Harrap.
    JHB

    Biographical history of technology > Rennie, John

  • 86 Riley, James

    SUBJECT AREA: Metallurgy
    [br]
    b. 1840 Halifax, England
    d. 15 July 1910 Harrogate, England
    [br]
    English steelmaker who promoted the manufacture of low-carbon bulk steel by the open-hearth process for tin plate and shipbuilding; pioneer of nickel steels.
    [br]
    After working as a millwright in Halifax, Riley found employment at the Ormesby Ironworks in Middlesbrough until, in 1869, he became manager of the Askam Ironworks in Cumberland. Three years later, in 1872, he was appointed Blast-furnace Manager at the pioneering Siemens Steel Company's works at Landore, near Swansea in South Wales. Using Spanish ore, he produced the manganese-rich iron (spiegeleisen) required as an additive to make satisfactory steel. Riley was promoted in 1874 to be General Manager at Landore, and he worked with William Siemens to develop the use of the latter's regenerative furnace for the production of open-hearth steel. He persuaded Welsh makers of tin plate to use sheets rolled from lowcarbon (mild) steel instead of from charcoal iron and, partly by publishing some test results, he was instrumental in influencing the Admiralty to build two naval vessels of mild steel, the Mercury and the Iris.
    In 1878 Riley moved north on his appointment as General Manager of the Steel Company of Scotland, a firm closely associated with Charles Tennant that was formed in 1872 to make steel by the Siemens process. Already by 1878, fourteen Siemens melting furnaces had been erected, and in that year 42,000 long tons of ingots were produced at the company's Hallside (Newton) Works, situated 8 km (5 miles) south-east of Glasgow. Under Riley's leadership, steelmaking in open-hearth furnaces was initiated at a second plant situated at Blochairn. Plates and sections for all aspects of shipbuilding, including boilers, formed the main products; the company also supplied the greater part of the steel for the Forth (Railway) Bridge. Riley was associated with technical modifications which improved the performance of steelmaking furnaces using Siemens's principles. He built a gasfired cupola for melting pig-iron, and constructed the first British "universal" plate mill using three-high rolls (Lauth mill).
    At the request of French interests, Riley investigated the properties of steels containing various proportions of nickel; the report that he read before the Iron and Steel Institute in 1889 successfully brought to the notice of potential users the greatly enhanced strength that nickel could impart and its ability to yield alloys possessing substantially lower corrodibility.
    The Steel Company of Scotland paid dividends in the years to 1890, but then came a lean period. In 1895, at the age of 54, Riley moved once more to another employer, becoming General Manager of the Glasgow Iron and Steel Company, which had just laid out a new steelmaking plant at Wishaw, 25 km (15 miles) south-east of Glasgow, where it already had blast furnaces. Still the technical innovator, in 1900 Riley presented an account of his experiences in introducing molten blast-furnace metal as feed for the open-hearth steel furnaces. In the early 1890s it was largely through Riley's efforts that a West of Scotland Board of Conciliation and Arbitration for the Manufactured Steel Trade came into being; he was its first Chairman and then its President.
    In 1899 James Riley resigned from his Scottish employment to move back to his native Yorkshire, where he became his own master by acquiring the small Richmond Ironworks situated at Stockton-on-Tees. Although Riley's 1900 account to the Iron and Steel Institute was the last of the many of which he was author, he continued to contribute to the discussion of papers written by others.
    [br]
    Principal Honours and Distinctions
    President, West of Scotland Iron and Steel Institute 1893–5. Vice-President, Iron and Steel Institute, 1893–1910. Iron and Steel Institute (London) Bessemer Gold Medal 1887.
    Bibliography
    1876, "On steel for shipbuilding as supplied to the Royal Navy", Transactions of the Institute of Naval Architects 17:135–55.
    1884, "On recent improvements in the method of manufacture of open-hearth steel", Journal of the Iron and Steel Institute 2:43–52 plus plates 27–31.
    1887, "Some investigations as to the effects of different methods of treatment of mild steel in the manufacture of plates", Journal of the Iron and Steel Institute 1:121–30 (plus sheets II and III and plates XI and XII).
    27 February 1888, "Improvements in basichearth steel making furnaces", British patent no. 2,896.
    27 February 1888, "Improvements in regenerative furnaces for steel-making and analogous operations", British patent no. 2,899.
    1889, "Alloys of nickel and steel", Journal of the Iron and Steel Institute 1:45–55.
    Further Reading
    A.Slaven, 1986, "James Riley", in Dictionary of Scottish Business Biography 1860–1960, Volume 1: The Staple Industries (ed. A.Slaven and S. Checkland), Aberdeen: Aberdeen University Press, 136–8.
    "Men you know", The Bailie (Glasgow) 23 January 1884, series no. 588 (a brief biography, with portrait).
    J.C.Carr and W.Taplin, 1962, History of the British Steel Industry, Harvard University Press (contains an excellent summary of salient events).
    JKA

    Biographical history of technology > Riley, James

  • 87 Simms, Frederick

    [br]
    b. 1863 Hamburg, Germany d. 1944
    [br]
    English engineer and entrepreneur who imported the first internal combustion engines into Britain.
    [br]
    Simms was born of English parents in Hamburg. He met Gottlieb Daimler at an exhibition in Bremen in 1890, where he had gone to exhibit an aerial cableway that he had designed to provide passenger transport over rivers and valleys; in the previous year, he had invented and patented an automatic railway ticket machine, the principle of which is still in use worldwide. He obtained a licence to develop the Daimler engine throughout the British Empire (excluding Canada). He had great trouble in arranging any demonstration of the Daimler engine as authorities were afraid of the risk of fire and explosion with petroleum spirit, particularly at indoor venues. He succeeded eventually in operating a boat with an internal combustion engine between Charing Cross and Westminster piers on the River Thames in 1891. He then rented space under a railway arch at Putney Bridge station for installing Daimler engines in boats. With Sir David Salomans he was responsible for organizing the first motor show in Britain in 1895; four cars were on show. Simms became a director of the main Daimler company, and was a consultant to the Coventry Daimler Company. He was the founder of the Automobile Club of Great Britain and Ireland, a forerunner of the Royal Automobile Club (RAC), as well as the Society of Motor Manufacturers and Traders.
    [br]
    Further Reading
    E.Johnson, 1986, The Dawn of Motoring, London: Mercedes-Benz UK Ltd.
    IMcN

    Biographical history of technology > Simms, Frederick

  • 88 Stanier, Sir William Arthur

    [br]
    b. 27 May 1876 Swindon, England
    d. 27 September 1965 London, England
    [br]
    English Chief Mechanical Engineer of the London Midland \& Scottish Railway, the locomotive stock of which he modernized most effectively.
    [br]
    Stanier's career started when he was Office Boy at the Great Western Railway's Swindon works. He was taken on as a pupil in 1892 and steady promotion elevated him to Works Manager in 1920, under Chief Mechanical Engineer George Churchward. In 1923 he became Principal Assistant to Churchward's successor, C.B.Collett. In 1932, at the age of 56 and after some forty years' service with the Great Western Railway (GWR), W.A.Stanier was appointed Chief Mechanical Engineer of the London Midland \& Scottish Railway (LMS). This, the largest British railway, had been formed by the amalgamation in 1923 of several long-established railways, including the London \& North Western and the Midland, that had strong and disparate traditions in locomotive design. A coherent and comprehensive policy had still to emerge; Stanier did, however, inherit a policy of reducing the number of types of locomotives, in the interest of economy, by the withdrawal and replacement of small classes, which had originated with constituent companies.
    Initially as replacements, Stanier brought in to the LMS a series of highly successful standard locomotives; this practice may be considered a development of that of G.J.Churchward on the GWR. Notably, these new locomotives included: the class 5, mixed-traffic 4–6–0; the 8F heavy-freight 2–8–0; and the "Duchess" 4–6–2 for express passenger trains. Stanier also built, in 1935, a steam-turbine-driven 4–6–2, which became the only steam-turbine locomotive in Britain to have an extended career in regular service, although the economies it provided were insufficient for more of the type to be built. From 1932–3 onwards, and initially as part of a programme to economize on shunting costs by producing a single-manned locomotive, the LMS started to develop diesel shunting locomotives. Stanier delegated much of the responsibility for these to C.E.Fairburn. From 1939 diesel-electric shunting locomotives were being built in quantity for the LMS: this was the first instance of adoption of diesel power on a large scale by a British main-line railway. In a remarkably short time, Stanier transformed LMS locomotive stock, formerly the most backward of the principal British railways, to the point at which it was second to none. He was seconded to the Government as Scientific Advisor to the Ministry of Production in 1942, and retired two years later.
    [br]
    Principal Honours and Distinctions
    Knighted 1943. FRS 1944. President, Institution of Mechanical Engineers 1941.
    Bibliography
    1955, "George Jackson Churchward", Transactions of the Newcomen Society 30 (Stanier provides a unique view of the life and work of his former chief).
    Further Reading
    O.S.Nock, 1964, Sir William Stanier, An Engineering Biography, Shepperton: Ian Allan (a full-length biography).
    John Bellwood and David Jenkinson, 1976, Oresley and Stanier. A Centenary Tribute, London: HMSO (a comparative account).
    C.Hamilton Ellis, 1970, London Midland \& Scottish, Shepperton: Ian Allan.
    PJGR

    Biographical history of technology > Stanier, Sir William Arthur

  • 89 Tull, Jethro

    [br]
    b. 30 March 1674 Basildon, Essex, England
    d. February 1741 Hungerford, Berkshire, England
    [br]
    English farmer who developed and publicized a system of row crop husbandry.
    [br]
    Jethro Tull was born into an English landowning family. He was educated at St John's College, Oxford, but left without a degree at the age of 17. He then spent three years on the Grand Tour before returning to study law at Gray's Inn in London. After six years he was admitted to the Bar, but he never practised, moving instead to one of his father's farms near Oxford.
    Because of labour problems he chose to plant sainfoin (Onobrychis viciaefolia) as a forage crop because it required less frequent reseeding than grass. The seed itself was expensive and of poor fertility, so he began to experiment. He discovered that the depth of sowing as well as the planting rate influenced germination and the rate of growth, he found the optimum rate could be gained with one plant per ft2, a much lower density than could be achieved by broadcasting. His experiments created labour problems. He is traditionally and incorrectly credited with the invention of the seed drill, but he did develop and use a drill on his own farm to achieve the planting rate and depth he needed without having to rely on his workforce.
    In 1711 Tull became ill and went to France, having first sold his original farm and moved to "Properous", near Hungerford. In France he developed a husbandry technique that used a horse hoe to stir the soil between the rows of plants achieved with his drill. He incorrectly believed that his increased yields were the result of nutrients released from the soil by this method, whereas they were more likely to have been the result of a reduction in weed competition as a result of the repeated cultivation.
    [br]
    Bibliography
    1731, The New Horse-Hoeing Husbandry, or an Essay on the Principals of Tillage and Vegetation (sets out the ideas and innovations for which he was already well known).
    Further Reading
    T.H.Marshall, 1929, "Jethro Tull and the new husbandry of the 18th century", Economic History Review 11:41–60 (the relevance and significance of Tull's work was already under discussion before his death; Marshall discusses the controversy).
    G.E.Fussell, 1973, Jethro Tull. His Influence on Mechanised Agriculture (presents a pro- Tull account).
    AP

    Biographical history of technology > Tull, Jethro

  • 90 power

    power n
    мощность
    accessory power system
    система энергопитания оборудования
    adjust idle power
    регулировать малый газ
    aft power nacelle
    хвостовая часть гондолы двигателя
    aircraft power reduction
    уменьшение мощности двигателей воздушного судна
    aircraft power supply
    бортовой источник электропитания
    asymmetric engines power
    асимметричная тяга двигателей
    at idle power
    на режиме малого газа
    attain the power
    достигать заданной мощности
    augmented power
    форсированный режим
    augment power
    форсировать мощность
    auxiliary power supply
    вспомогательный источник энергопитания
    auxiliary power unit
    вспомогательная силовая установка
    bearing power
    несущая способность
    best economy power
    оптимальный режим
    bus power failure
    отказ бортовой электрошины
    chop the power
    внезапно изменять режим
    climbing power
    мощность, необходимая для набора высоты
    come to takeoff power
    выходить на взлетный режим
    contingency power
    мощность на чрезвычайном режиме
    cruising power
    крейсерская мощность
    develop power
    развивать мощность
    draw power
    передавать мощность
    dry power
    мощность без впрыска воды
    electrical power source
    источник электропитания
    electric power cart
    электротележка
    emergency power supply
    аварийный источник энергопитания
    emergency power system
    система аварийного энергопитания
    equivalent shaft power
    эквивалентная мощность на валу
    excess power
    избыточная мощность
    external electrical power
    аэродромное электропитание
    external electrical power system
    система аэродромного электропитания
    external power connector
    разъем аэродромного питания
    external power not available
    аэродромное питание отсутствует
    external power receptacle
    разъем аэродромного питания
    external power relay
    реле включения внешнего питания
    flight idle power
    мощность на режиме полетного малого газа
    free power turbine
    свободная турбина
    full power conditions
    максимальный режим
    gain the power
    достигать заданной мощность
    gas turbine power plant
    газотурбинная силовая установка
    ground power unit
    аэродромный пусковой агрегат
    hydraulic power cylinder
    гидравлический силовой цилиндр
    idle power rating
    режим малого газа
    induced drag power
    мощность на преодоление аэродинамического сопротивления
    lifting power
    подъемная сила
    (lift force, lift, ascensional force, buoyancy) maximum continuous power
    номинальный режим
    move under own power
    двигаться за счет собственной тяги
    output power
    выходная мощность
    outside power unit
    внешний источник питания
    pneumatic power cylinder
    пневматический силовой цилиндр
    power augmentation
    форсирование мощности
    power augmentation control
    управление форсажем
    power calibration
    тарировка мощности
    power cylinder
    силовой цилиндр
    power fail relay
    реле сигнализации отказа питания
    power indicator
    указатель мощности
    power margin
    запас мощности
    power off
    убрать режим
    power output
    выходная мощность
    power patrol operation
    патрулирование линий электропередач с воздуха
    power plant
    силовая установка
    power recovery turbine
    турбина с приводом от выхлопных газов
    power reduction operation
    уменьшение мощности
    power reversal ejector
    отражатель в механизме реверса тяги
    power setting
    установка мощности
    (двигателя) power shaft
    вал привода
    power source
    генератор
    power spin
    штопор при работающих двигателях
    power stroke
    рабочий ход
    (поршня) power supply circuit
    цепь подачи питания
    power taking-off
    процесс отбора мощности
    power the bus
    включать шину
    power unit
    силовой агрегат
    profile drag power
    мощность на преодоление профильного сопротивления
    provide power
    выдавать мощность
    rated power
    номинальная мощность
    reheat power
    форсажный режим
    required power
    потребная мощность
    run at idle power
    работать на режиме малого газа
    secondary power supply
    резервный источник энергопитания
    set idle power
    выводить на режим малого газа
    set takeoff power
    устанавливать взлетный режим
    sound power
    звуковая мощность
    specific power
    удельная мощность
    standby power unit
    запасной агрегат
    starting on external power
    запуск от внешнего источника
    takeoff power
    взлетная мощность
    take off power to the shaft
    отбирать мощность на вал
    thrust power
    тяговая мощность
    transmission power input
    мощность, поступающая на вал трансмиссии
    transmit power
    передавать мощность
    with rated power flight
    полет на номинальном расчетном режиме

    English-Russian aviation dictionary > power

  • 91 Cognitive Science

       The basic idea of cognitive science is that intelligent beings are semantic engines-in other words, automatic formal systems with interpretations under which they consistently make sense.... [P]eople and intelligent computers turn out to be merely different manifestations of the same underlying phenomenon. (Haugeland, 1981b, p. 31)
       2) Experimental Psychology, Theoretical Linguistics, and Computational Simulation of Cognitive Processes Are All Components of Cognitive Science
       I went away from the Symposium with a strong conviction, more intuitive than rational, that human experimental psychology, theoretical linguistics, and computer simulation of cognitive processes were all pieces of a larger whole, and that the future would see progressive elaboration and coordination of their shared concerns.... I have been working toward a cognitive science for about twenty years beginning before I knew what to call it. (G. A. Miller, 1979, p. 9)
        Cognitive Science studies the nature of cognition in human beings, other animals, and inanimate machines (if such a thing is possible). While computers are helpful within cognitive science, they are not essential to its being. A science of cognition could still be pursued even without these machines.
        Computer Science studies various kinds of problems and the use of computers to solve them, without concern for the means by which we humans might otherwise resolve them. There could be no computer science if there were no machines of this kind, because they are indispensable to its being. Artificial Intelligence is a special branch of computer science that investigates the extent to which the mental powers of human beings can be captured by means of machines.
       There could be cognitive science without artificial intelligence but there could be no artificial intelligence without cognitive science. One final caveat: In the case of an emerging new discipline such as cognitive science there is an almost irresistible temptation to identify the discipline itself (as a field of inquiry) with one of the theories that inspired it (such as the computational conception...). This, however, is a mistake. The field of inquiry (or "domain") stands to specific theories as questions stand to possible answers. The computational conception should properly be viewed as a research program in cognitive science, where "research programs" are answers that continue to attract followers. (Fetzer, 1996, pp. xvi-xvii)
       What is the nature of knowledge and how is this knowledge used? These questions lie at the core of both psychology and artificial intelligence.
       The psychologist who studies "knowledge systems" wants to know how concepts are structured in the human mind, how such concepts develop, and how they are used in understanding and behavior. The artificial intelligence researcher wants to know how to program a computer so that it can understand and interact with the outside world. The two orientations intersect when the psychologist and the computer scientist agree that the best way to approach the problem of building an intelligent machine is to emulate the human conceptual mechanisms that deal with language.... The name "cognitive science" has been used to refer to this convergence of interests in psychology and artificial intelligence....
       This working partnership in "cognitive science" does not mean that psychologists and computer scientists are developing a single comprehensive theory in which people are no different from machines. Psychology and artificial intelligence have many points of difference in methods and goals.... We simply want to work on an important area of overlapping interest, namely a theory of knowledge systems. As it turns out, this overlap is substantial. For both people and machines, each in their own way, there is a serious problem in common of making sense out of what they hear, see, or are told about the world. The conceptual apparatus necessary to perform even a partial feat of understanding is formidable and fascinating. (Schank & Abelson, 1977, pp. 1-2)
       Within the last dozen years a general change in scientific outlook has occurred, consonant with the point of view represented here. One can date the change roughly from 1956: in psychology, by the appearance of Bruner, Goodnow, and Austin's Study of Thinking and George Miller's "The Magical Number Seven"; in linguistics, by Noam Chomsky's "Three Models of Language"; and in computer science, by our own paper on the Logic Theory Machine. (Newell & Simon, 1972, p. 4)

    Historical dictionary of quotations in cognitive science > Cognitive Science

  • 92 Emotion

    .. propose that reason may not be as pure as most of us think it is or wish it were, that emotions and feelings may not be intruders in the bastion of reason at all: they may be enmeshed in its networks, for worse and for better.
       The strategies of human reason probably did not develop, in either evolution or any single individual, without the guiding force of the mechanisms of biological regulation, of which emotion and feeling are notable expressions. Moreover, even after reasoning strategies become established in the formative years, their effective deployment probably depends, to a considerable extent, on a continued ability to experience feelings.
       This is not to deny that emotions and feelings can cause havoc in the processes of reasoning under certain circumstances. Traditional wisdom has told us that they can, and recent investigations of the normal reasoning process also reveal the potentially harmful influence of emotional biases. It is thus even more surprising and novel that the absence of emotion and feeling is no less damaging, no less capable of compromising the rationality that makes us distinctly human and allows us to decide in consonance with a sense of personal future, social convention, and moral principle. (Damasio, 1994, p. xii)

    Historical dictionary of quotations in cognitive science > Emotion

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