-
41 Raky, Anton
SUBJECT AREA: Mining and extraction technology[br]b. 5 January 1868 Seelenberg, Taunus, Germanyd. 22 August 1943 Berlin, Germany[br]German inventor of rapid percussion drilling, entrepreneur in the exploration business.[br]While apprenticed at the drilling company of E. Przibilla, Raky already called attention by his reflections towards developing drilling methods and improving tools. Working as a drilling engineer in Alsace, he was extraordinarily successful in applying an entire new hydraulic boring system in which the rod was directly connected to the chisel. This apparatus, driven by steam, allowed extremely rapid percussions with very low lift.With some improvements, his boring rig drilled deep holes at high speed and at least doubled the efficiency of the methods hitherto used. His machine, which was also more reliable, was secured by a patent in 1895. With borrowed capital, he founded the Internationale Bohrgesellschaft in Strasbourg in the same year, and he began a career in the international exploration business that was unequalled as well as breathtaking. Until 1907 the total depth of the drillings carried out by the company was 1,000 km.Raky's rapid drilling was unrivalled and predominant until improved rotary drilling took over. His commercial sense in exploiting the technical advantages of his invention by combining drilling with producing the devices in his own factory at Erkelenz, which later became the headquarters of the company, and in speculating on the concessions for the explored deposits made him by far superior to all of his competitors, who were provoked into contests which they generally lost. His flourishing company carried out drilling in many parts of the world; he became the initiator of the Romanian oil industry and his extraordinary activities in exploring potash and coal deposits in different parts of Germany, especially in the Ruhr district, provoked the government in 1905 into stopping granting claims to private companies. Two years later, he was forced to withdraw from his holding company because of his restless and eccentric character. He turned to Russia and, during the First World War, he was responsible for the reconstruction of the destroyed Romanian oilfields. Thereafter, partly financed by mining companies, he continued explorations in several European countries, and in Germany he was pioneering again with exploring oilfields, iron ore and lignite deposits which later grew in economic value. Similar to Glenck a generation before, he was a daring entrepreneur who took many risks and opened new avenues of exploration, and he was constantly having to cope with a weak financial position, selling concessions and shares, most of them to Preussag and Wintershall; however, this could not prevent his business from collapse in 1932. He finally gave up drilling in 1936 and died a poor man.[br]Principal Honours and DistinctionsDr-Ing. (Hon.) Bergakademie Clausthal 1921.Further ReadingG.P.R.Martin, 1967, "Hundert Jahre Anton Raky", Erdöl-Erdgas-Zeitschrift, 83:416–24 (a detailed description).D.Hoffmann, 1959, 150 Jahre Tiefbohrungen in Deutschland, Vienna and Hamburg: 32– 4 (an evaluation of his technologial developments).WK -
42 Shannon, Claude Elwood
[br]b. 30 April 1916 Gaylord, Michigan, USA[br]American mathematician, creator of information theory.[br]As a child, Shannon tinkered with radio kits and enjoyed solving puzzles, particularly crypto-graphic ones. He graduated from the University of Michigan in 1936 with a Bachelor of Science in mathematics and electrical engineering, and earned his Master's degree from the Massachusetts Institute of Technology (MIT) in 1937. His thesis on applying Boolean algebra to switching circuits has since been acclaimed as possibly the most significant this century. Shannon earned his PhD in mathematics from MIT in 1940 with a dissertation on the mathematics of genetic transmission.Shannon spent a year at the Institute for Advanced Study in Princeton, then in 1941 joined Bell Telephone Laboratories, where he began studying the relative efficiency of alternative transmission systems. Work on digital encryption systems during the Second World War led him to think that just as ciphers hide information from the enemy, "encoding" information could also protect it from noise. About 1948, he decided that the amount of information was best expressed quantitatively in a two-value number system, using only the digits 0 and 1. John Tukey, a Princeton colleague, named these units "binary digits" (or, for short, "bits"). Almost all digital computers and communications systems use such on-off, or two-state logic as their basis of operation.Also in the 1940s, building on the work of H. Nyquist and R.V.L. Hartley, Shannon proved that there was an upper limit to the amount of information that could be transmitted through a communications channel in a unit of time, which could be approached but never reached because real transmissions are subject to interference (noise). This was the beginning of information theory, which has been used by others in attempts to quantify many sciences and technologies, as well as subjects in the humanities, but with mixed results. Before 1970, when integrated circuits were developed, Shannon's theory was not the preferred circuit-and-transmission design tool it has since become.Shannon was also a pioneer in the field of artificial intelligence, claiming that computing machines could be used to manipulate symbols as well as do calculations. His 1953 paper on computers and automata proposed that digital computers were capable of tasks then thought exclusively the province of living organisms. In 1956 he left Bell Laboratories to join the MIT faculty as Professor of Communications Science.On the lighter side, Shannon has built many devices that play games, and in particular has made a scientific study of juggling.[br]Principal Honours and DistinctionsNational Medal of Science. Institute of Electrical and Electronics Engineers Medal of Honor, Kyoto Prize.BibliographyHis seminal paper (on what has subsequently become known as information theory) was entitled "The mathematical theory of communications", first published in Bell System Technical Journal in 1948; it is also available in a monograph (written with Warren Weaver) published by the University of Illinois Press in 1949, and in Key Papers in the Development of Information Theory, ed. David Slepian, IEEE Press, 1974, 1988. For readers who want all of Shannon's works, see N.J.A.Sloane and A.D.Wyner, 1992, TheCollected Papers of Claude E.Shannon.HO -
43 Walschaert, Egide
SUBJECT AREA: Steam and internal combustion engines[br]b. 20 January 1820 Mechlin, Belgiumd. 18 February 1901 Saint-Lilies, Brussels, Belgium[br]Belgian inventor of Walschaerrt valve gear for steam engines.[br]Walschaert was appointed Foreman of the Brussels Midi workshops of the Belgian State Railways in 1844, when they were opened, and remained in this position until 1885. He invented his valve gear the year he took up his appointment and was allowed to fit it to a 2–2–2 locomotive in 1848, the results being excellent. It was soon adopted in Belgium and to a lesser extent in France, but although it offered accessibility, light weight and mechanical efficiency, railways elsewhere were remarkably slow to take it up. It was first used in the British Isles in 1878, on a 0–4–4 tank locomotive built to the patent of Robert Fairlie, but was not used again there until 1890. By contrast, Fairlie had already used Walchaert's valve gear in 1873, on locomotives for New Zealand, and when New Zealand Railways started to build their own locomotives in 1889 they perpetuated it. The valve gear was only introduced to the USA following a visit by an executive of the Baldwin Locomotive Works to New Zealand ten years later. Subsequently it came to be used almost everywhere there were steam locomotives. Walschaert himself invented other improvements for steam engines, but none with lasting effect.[br]Further ReadingP.Ransome-Wallis (ed.), 1959, The Concise Encyclopaedia, of World Railway Locomotives, London: Hutchinson (includes both a brief biography of Walschaert (p.502) and a technical description of his valve gear (p. 298)).E.L.Ahrons, 1927, The British Steam Railway Locomotive 1825–1925, London: The Locomotive Publishing Co., pp. 224 and 289 (describes the introduction of the valve gear to Britain).J.B.Snell, 1964, Early Railways, London: Weidenfeld \& Nicolson, 103.PJGR -
44 предложение
предложения по улучшению конструкции, обслуживания оборудования, безопасной и эффективной эксплуатации или относящиеся к применению рекомендуемых смазочных и консервационных материалов должны докладываться по техническим каналам согласно... — Any suggestions for improvement in design and maintenance of the equipment, safety and efficiency of operation, or pertaining to the application of prescribed lubricants and preserving materials, will be reported through technical channels as prescribed in...Поставки машин и оборудования. Русско-английский словарь > предложение
-
45 контракт на оказание технического содействия
Бизнес, юриспруденция. Русско-английский словарь > контракт на оказание технического содействия
См. также в других словарях:
technical efficiency — ➔ efficiency * * * technical efficiency UK US noun [U] PRODUCTION ► a situation in which a company or a particular machine produces the largest possible number of goods with the time, materials, labour, etc. that are available: »We place a lot of … Financial and business terms
efficiency — technical efficiency 1) A measure of the ability of an organization to produce the maximum output of acceptable quality with the minimum of time, effort, and other inputs. One company is said to be more efficient than another if it can produce… … Big dictionary of business and management
technical inefficiency — UK US noun [U] PRODUCTION ► a situation in which a company or a particular machine fails to produce the largest possible number of goods with the time, materials, labour, etc. that are available: »This article examines the technical inefficiency… … Financial and business terms
Efficiency — Reflects the amount of wasted energy. The New York Times Financial Glossary * * * efficiency ef‧fi‧cien‧cy [ɪˈfɪʆnsi] noun [uncountable] MANUFACTURING 1. how well an industrial process, factory, or business works so that it produces as much as… … Financial and business terms
efficiency — Because of futures contracts standardization of terms, large numbers of traders from all walks of life may trade futures, thus allowing prices to be determined readily (it is more likely that someone will want a contract at any given price). The… … Financial and business terms
Efficiency Movement — Part of the Politics series on Progressivism Schools American Progressivism Modern liberalism Progressive education Ideas Anti racism Civil liberties … Wikipedia
efficiency — There are conflicting notions of efficiency in everyday work life. Technical efficiency is relatively straightforward, and describes the relation of various energy inputs into equipment, in relation to output (though it may be difficult or… … Dictionary of sociology
Efficiency — as a technical term may refer to: * Algorithmic efficiency, optimizing the speed and memory requirements of a computer program * Efficient energy use, useful work per quantity of energy ** Energy conversion efficiency, desired energy output per… … Wikipedia
Technical intelligence — In a pure military context, Technical Intelligence (TECHINT) is intelligence about weapons and equipment used by the armed forces of foreign nations (often referred to as foreign materiel).The related term, scientific and technical intelligence,… … Wikipedia
efficiency — noun ADJECTIVE ▪ ruthless ▪ great, high ▪ attempts to achieve greater efficiency in the production process ▪ improved, increased ▪ … Collocations dictionary
Technical Progress Function — An economic relation which seeks to explain changes in the level of economic output in terms of the level of technical progress. Rather than looking at economic growth as a form of efficiently allocating inputs, the technical progress function… … Investment dictionary
