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1 Marrison, Warren Alvin
[br]b. 21 May 1896 Inverary, Canadad. 27 March 1980 Palo Verdes Estates, California, USA[br]Canadian (naturalized American) electrical engineer, pioneer of the quartz clock.[br]Marrison received his high-school education at Kingston Collegiate Institute, Ontario, and in 1914 he entered Queen's University in Kingston. He graduated in Engineering Physics in 1920, his college career having been interrupted by war service in the Royal Flying Corps. During his service in the Flying Corps he worked on radio, and when he returned to Kingston he established his own transmitter. This interest in radio was later to influence his professional life.In 1921 he entered Harvard University, where he obtained an MA, and shortly afterwards he joined the Western Electric Company in New York to work on the recording of sound on film. In 1925 he transferred to Western Electric's Bell Laboratory, where he began what was to become his life's work: the development of frequency standards for radio transmission. In 1922 Cady had used the elastic vibration of a quartz crystal to control the frequency of a valve oscillator, but at that time there was no way of counting and displaying the number of vibrations as the frequency was too high. In 1927 Marrison succeeded in dividing the frequency electronically until it was low enough to drive a synchronous motor. Although his purpose was to determine the frequency accurately by counting the number of vibrations that occurred in a given time, he had incidentally produced the first quartz-crystal -ontrolled clock. The results were sufficiently encouraging for him to build an improved version the following year, specifically as a time and frequency standard.[br]Principal Honours and DistinctionsBritish Horological Institute Gold Medal 1947. Clockmakers' Company Tompion Medal 1955.Bibliography1928, with J.W.Horton, "Precision measurement of frequency", Proceedings of the Institute of Radio Engineers 16:137–54 (provides details of the original quartz clock, although it was not described as such).1930, "The crystal clock", Proceedings of the National Academy of Sciences 16:496–507 (describes the second clock).Further ReadingW.R.Topham, 1989, "Warren A.Marrison—pioneer of the quartz revolution", NAWCC Bulletin 31(2):126–34.J.D.Weaver, 1982, Electrical and Electronic Clocks and Watches, London (a technical assessment of his work on the quartz clock).DV -
2 вызывать
1) General subject: account (for; что-л.), arouse (чувства, страсти, энергию), breed, bring, bring about, bring back, bring out, bring to pass, call, call before the curtain (актёра на сцену), call up (по телефону), cause, challenge, cite (в суд, преим. церковный), conjure (духов), convene (в суд), create (какое-либо чувство и т. п.), dare (на что-либо), defy, disgust, draw, draw forth (смех, возражения, слезы), elicit, encore, engender, entail (что-либо), evoke (воспоминание, восхищение и т. п.), excite (ревность, ненависть), exert (напряжение), fetch (слезы, кровь), float your boat (интерес и т. п.), generate, give rise to, haul (в суд), have in, induce, invoke, involve, move (какие-либо чувства, эмоции), occasion, offer, page (громко выкликая фамилию; Page Dr. Jones! - Вызовите доктора Джоунза!), produce, prompt (мысль и т. п.), provoke, provoke applauses from (аплодисменты), raise (смех, сомнение, тревогу), rouse, salivate, send for, set at variance, spawn, suggest, summon (в суд), trigger, undertake, warn to a place (куда-л.), whistle up, work, work up, call in (врача), call out (на дуэль), draw out (на откровенность), give occasion to (что-л.), give rise to (что-л.), dare to (кого-л., на что-л.), impart, spark (The suggestion of using the United States to counteract Chinese influence sparked a cyber-storm of protests... - Предположение об использовании Соединенных Штатов в целях противодействия влиянию К), foster, precipitate, set, account for, (воспоминание, восхищение и т. п.) evocate (см. to evoke)4) Colloquial: (невольно) extort5) American: page (кого-л.), page-boy (кого-л.)6) Sports: announce7) Poetical language: procure9) Engineering: cause (быть причиной), induce (быть причиной), provoke (быть причиной)12) Mathematics: initiate14) Australian slang: spark off15) Diplomatic term: summon (в суд и т.п.)16) Forestry: ring17) Radio: to (в радиопереговорах, напр.: Bob to Grasshopper! Боб вызывает Кузнечика!), this is (в радиопереговорах, напр.: Grasshopper, this is Bob! Боб вызывает Кузнечика!)18) Telecommunications: ring up19) School: send up (к директору и т.п. для наказания или поощрения)20) Electronics: recall (содержимое ЗУ)21) Information technology: activate, dial, fetch (данные или программы из памяти), issue22) Oil: bring on, give rise, trigger off23) Communications: signal24) Astronautics: effect25) Business: call in, necessitate26) Network technologies: dial-up27) Programming: contribute (напр. проблемы)28) Quality control: induce (отказы), involve (последствия)29) Makarov: activate (напр., программу), attract, be responsible for, bring into operation, cause (являться причиной), draw (слезы, восторг и т.п.), fetch (слезы и т.п.), generate (current) (ток), give place to, give rise to (являться причиной), give rise to (...) (быть причиной), induce (инициировать), induce (являться причиной), initiate (инициировать), invite, lead to, motive, present (problems) (проблемы), produce (быть причиной), result in, result in (быть причиной), ring (посылать вызывной сигнал), ring up (no телефону), send (for), set up (vibrations) (колебания), signal (посылать вызывной сигнал), trigger (что-л.), work (часто что-л. неожиданное или неприятное), call away, call forth, call out, call for (актёра), call out (актёра), call forth (возбуждать), conjure up (духов), dare to (кого-л. на что-л.), dare to do (кого-л. на что-л.), call over (напр. датчики), call out (откуда-л.), draw forth (смех возражения слезы и т. п.), call out (ученика к доске)30) SAP.tech. access -
3 случайные колебания
1) Engineering: random vibrations2) Mathematics: chance fluctuations, random fluctuations, stochastic fluctuations3) Economy: random movements4) Telecommunications: random waves5) Ecology: chance fluctuation, random fluctuation6) Business: change fluctuations7) Automation: random variations, random vibration8) Quality control: stochastic variations9) SAP.tech. coincidental fluctuationsУниверсальный русско-английский словарь > случайные колебания
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4 управление отрывом пограничного слоя за счёт вибрации стенки
Универсальный русско-английский словарь > управление отрывом пограничного слоя за счёт вибрации стенки
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5 གནས་སྐབས་སུ་རླུང་
[gnas skabs su rlung]technique related to the control of vibrations -
6 Hetzel, Max
[br]b. 5 March 1921 Basle, Switzerland[br]Swiss electrical engineer who invented the tuning-fork watch.[br]Hetzel trained as an electrical engineer at the Federal Polytechnic in Zurich and worked for several years in the field of telecommunications before joining the Bulova Watch Company in 1950. At that time several companies were developing watches with electromagnetically maintained balances, but they represented very little advance on the mechanical watch and the mechanical switching mechanism was unreliable. In 1952 Hetzel started work on a much more radical design which was influenced by a transistorized tuning-fork oscillator that he had developed when he was working on telecommunications. Tuning forks, whose vibrations were maintained electromagnetically, had been used by scientists during the nineteenth century to measure small intervals of time, but Niaudet- Breguet appears to have been the first to use a tuning fork to control a clock. In 1866 he described a mechanically operated tuning-fork clock manufactured by the firm of Breguet, but it was not successful, possibly because the fork did not compensate for changes in temperature. The tuning fork only became a precision instrument during the 1920s, when elinvar forks were maintained in vibration by thermionic valve circuits. Their primary purpose was to act as frequency standards, but they might have been developed into precision clocks had not the quartz clock made its appearance very shortly afterwards. Hetzel's design was effectively a miniaturized version of these precision devices, with a transistor replacing the thermionic valve. The fork vibrated at a frequency of 360 cycles per second, and the hands were driven mechanically from the end of one of the tines. A prototype was working by 1954, and the watch went into production in 1960. It was sold under the tradename Accutron, with a guaranteed accuracy of one minute per month: this was a considerable improvement on the performance of the mechanical watch. However, the events of the 1920s were to repeat themselves, and by the end of the decade the Accutron was eclipsed by the introduction of quartz-crystal watches.[br]Principal Honours and DistinctionsNeuchâtel Observatory Centenary Prize 1958. Swiss Society for Chronometry Gold Medal 1988.Bibliography"The history of the “Accutron” tuning fork watch", 1969, Swiss Watch \& Jewellery Journal 94:413–5.Further ReadingR.Good, 1960, "The Accutron", Horological Journal 103:346–53 (for a detailed technical description).J.D.Weaver, 1982, Electrical \& Electronic Clocks \& Watches, London (provides a technical description of the tuning-fork watch in its historical context).DV -
7 упругий
1. elastic2. resilient[lang name="Russian"]упругая прокладка; упругая покрышка — resilient packing
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8 параметрический
Русско-английский новый политехнический словарь > параметрический
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