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121 Forrester, Jay Wright
SUBJECT AREA: Electronics and information technology[br]b. 14 July 1918 Anselmo, Nebraska, USA[br]American electrical engineer and management expert who invented the magnetic-core random access memory used in most early digital computers.[br]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.[br]Principal Honours and DistinctionsNational Academy of Engineering 1967. George Washington University Inventor of the Year 1968. Danish Academy of Science Valdemar Poulsen Gold Medal 1969. Systems, Man and Cybernetics Society Award for Outstanding Accomplishments 1972. Computer Society Pioneer Award 1972. Institution of Electrical Engineers Medal of Honour 1972. National Inventors Hall of Fame 1979. Magnetics Society Information Storage Award 1988. Honorary DEng Nebraska 1954, Newark College of Engineering 1971, Notre Dame University 1974. Honorary DSc Boston 1969, Union College 1973. Honorary DPolSci Mannheim University, Germany. Honorary DHumLett, State University of New York 1988.Bibliography1951, "Data storage in three dimensions using magnetic cores", Journal of Applied Physics 20: 44 (his first description of the core store).Publications on management include: 1961, Industrial Dynamics, Cambridge, Mass.: MIT Press; 1968, Principles of Systems, 1971, Urban Dynamics, 1980, with A.A.Legasto \& J.M.Lyneis, System Dynamics, North Holland. 1975, Collected Papers, Cambridge, Mass.: MIT.Further ReadingK.C.Redmond \& T.M.Smith, Project Whirlwind, the History of a Pioneer Computer (provides details of the Whirlwind computer).H.H.Goldstine, 1993, The Computer from Pascal to von Neumann, Princeton University Press (for more general background to the development of computers).Serrell et al., 1962, "Evolution of computing machines", Proceedings of the Institute ofRadio Engineers 1,047.M.R.Williams, 1975, History of Computing Technology, London: Prentice-Hall.See also: Burks, Arthur Walter; Goldstine, Herman H.; Wilkes, Maurice Vincent; Williams, Sir Frederic CallandKF -
122 Jansky, Karl Guthe
[br]b. 22 October 1905 Norman, Oklahoma, USAd. 14 February 1950 Red Bank, New Jersey, USA[br]American radio engineer who discovered stellar radio emission.[br]Following graduation from the University of Wisconsin in 1928 and a year of postgraduate study, Jansky joined Bell Telephone Laboratories in New Jersey with the task of establishing the source of interference to telephone communications by radio. To this end he constructed a linear-directional short-wave antenna and eventually, in 1931, he concluded that the interference actually came from the stars, the major source being the constellation Sagittarius in the direction of the centre of the Milky Way. Although he continued to study the propagation of short radio waves and the nature of observed echoes, it was left to others to develop the science of radioastronomy and to use the creation of echoes for radiolocation. Although he received no scientific award for his discovery, Jansky's name is primarily honoured by its use as the unit of stellar radio-emission strength.[br]Bibliography1935, "Directional studies of atmospherics at high frequencies", Proceedings of the Institute of Radio Engineers 23:1,158.1935, "A note on the sources of stellar interference", Proceedings of the Institute of RadioEngineers.1937, "Minimum noise levels obtained on short-wave radio receiving systems", Proceedings of the Institute of Radio Engineers 25:1,517.1941, "Measurements of the delay and direction of arrival of echoes from nearby short-wave transmitters", Proceedings of the Institute of Radio Engineers 29:322.Further ReadingP.C.Mahon, 1975, BellLabs, Mission Communication. The Story of the Bell Labs.W.I.Sullivan (ed.), 1984, The Early Years of Radio-Astronomy: Reflections 50 Years after Jansky's Discovery, Cambridge: Cambridge University Press.See also: Appleton, Sir Edward VictorKF -
123 Porsche, Ferdinand
[br]b. 3 September 1875 Maffersdorf, Austriad. 30 January 1952 Stuttgart, Baden-Württemberg, Germany[br]Austrian automobile engineer, designer of the Volkswagen car.[br]At the age of fifteen, Porsche built a complete electrical installation for his home. In 1894 he went to technical school in Vienna. Four years later he became Manager of the test department of the Bela Egger concern, which later became part of the Brown Boveri organization where he became the first Assistant in the calculating section. In 1899 he joined the long-established coachbuilders Jacob Lohner, and in 1902 a car of his design with mixed drive won the 1,000 kg (2,200 lb) class in the Exelberg races. In 1905 he joined the Austro-Daimler Company as Technical Director; his subsequent designs included an 85 hp mixed-drive racing car in 1907 and in 1912 an air-cooled aircraft engine which came to be known in later years as the "great-grandfather" of the Volkswagen engine. In 1916, he became Managing Director of Austro-Daimler.In 1921 he designed his first small car, which, appearing under the name of Sasch, won its class in the 1922 Targa Florio, a gruelling road-race in Italy. In 1923 Porsche left Austro-Daimler and joined the Daimler Company in Untertürk-heim, near Stuttgart, Germany. In 1929 he joined the firm of Steyr in Austria as a director and chief engineer, and in 1930 he set up his own independent design office in Stuttgart. In 1932 he visited Russia, and in the same year completed the design calculations for the Auto-Union racing car.In 1934, with his son Ferry (b. 1909), he prepared a plan for the construction of the German "people's car", a project initiated by Adolf Hitler and his Nazi regime; in June of that year he signed a contract for the design work on the Volkswagen. Racing cars of his design were also successful in 1934: the rear-engined Auto-Union won the German Grand Prix, and another Au to-Union car took the Flying Kilometre speed record at 327 km/h (203.2 mph). In 1935 Daimler-Benz started preproduction on the Volkswagen. The first trials of the cars took place in the autumn of 1936, and the following year thirty experimental cars were built by Daimler-Benz. In that year, Porsche visited the United States, where he met Henry Ford; in October an Auto-Union took the Flying Five Kilometre record at 404.3 km/h (251.2 mph). On 26 May 1938, the foundation stone of the Volkswagen factory was laid in Wolfsburg, near Braunschweig, Germany.In October 1945 Ferdinand Porsche was arrested by a unit of the United States Army and taken to Hessen; the French army removed him to Baden-Baden, then to Paris and later to Dijon. During this time he was consulted by Renault engineers regarding the design of their 4CV and designed a diesel-engined tractor. He was finally released on 5 August 1947. His last major work before his death was the approval of the design for the Cisitalia Grand Prix car.[br]Principal Honours and DistinctionsPoetting Medal 1905. Officer's Cross of Franz Josef 1916. Honorary PhD, Vienna Technical University 1916. Honorary PhD, University of Stuttgart 1924.Further ReadingK.Ludvigsen, 1983, Porsche: Excellence Was Expected: The Complete History of the Sports and Racing Cars, London: Frederick Muller.T.Shuler and G.Borgeson, 1985, "Origin and Evolution of the VW Beetle", AutomobileQuarterly (May).M.Toogood, 1991, Porsche—Germany's Legend, London: Apple Press.IMcN -
124 Randall, Sir John Turton
SUBJECT AREA: Medical technology[br]b. 23 March 1905 Newton-le-Willows, Lancashire, Englandd. 16 June 1984 Edinburgh, Scotland[br]English physicist and biophysicist, primarily known for the development, with Boot of the cavity magnetron.[br]Following secondary education at Ashton-inMakerfield Grammar School, Randall entered Manchester University to read physics, gaining a first class BSc in 1925 and his MSc in 1926. From 1926 to 1937 he was a research physicist at the General Electric Company (GEC) laboratories, where he worked on luminescent powders, following which he became Warren Research Fellow of the Royal Society at Birmingham University, studying electronic processes in luminescent solids. With the outbreak of the Second World War he became an honorary member of the university staff and transferred to a group working on the development of centrimetric radar. With Boot he was responsible for the development of the cavity magnetron, which had a major impact on the development of radar.When Birmingham resumed its atomic research programme in 1943, Randall became a temporary lecturer at the Cavendish Laboratory in Cambridge. The following year he was appointed Professor of Natural Philosophy at the University of St Andrews, but in 1946 he moved again to the Wheatstone Chair of Physics at King's College, London. There his developing interest in biophysical research led to the setting up of a multi-disciplinary group in 1951 to study connective tissues and other biological components, and in 1950– 5 he was joint Editor of Progress in Biophysics. From 1961 until his retirement in 1970 he was Professor of Biophysics at King's College and for most of that time he was also Chairman of the School of Biological Sciences. In addition, for many years he was honorary Director of the Medical Research Council Biophysics Research Unit.After he retired he returned to Edinburgh and continued to study biological problems in the university zoology laboratory.[br]Principal Honours and DistinctionsKnighted 1962. FRS 1946. FRS Edinburgh 1972. DSc Manchester 1938. Royal Society of Arts Thomas Gray Memorial Prize 1943. Royal Society Hughes Medal 1946. Franklin Institute John Price Wetherill Medal 1958. City of Pennsylvania John Scott Award 1959. (All jointly with Boot for the cavity magnetron.)Bibliography1934, Diffraction of X-Rays by Amorphous Solids, Liquids \& Gases (describes his early work).1953, editor, Nature \& Structure of Collagen.1976, with H.Boot, "Historical notes on the cavity magnetron", Transactions of the Institute of Electrical and Electronics Engineers ED-23: 724 (gives an account of the cavity-magnetron development at Birmingham).Further ReadingM.H.F.Wilkins, "John Turton Randall"—Bio-graphical Memoirs of Fellows of the Royal Society, London: Royal Society.KFBiographical history of technology > Randall, Sir John Turton
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125 forbidden interval
English-Russian dictionary of Information technology > forbidden interval
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126 ideal significant interval
English-Russian dictionary of Information technology > ideal significant interval
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127 interval
1. интервал2. интервальныйinterval analysis — интервальный анализ; интервальная арифметика
interval timer — интервальный таймер; датчик временных интервалов; реле времени
English-Russian dictionary of Information technology > interval
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128 pitch interval
English-Russian dictionary of Information technology > pitch interval
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