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1 atomic second
атомная секунда
физическая секунда
Интервал времени, равный 9192 631 770,0 периодам колебаний цезиевого репера частоты.
[Сборник рекомендуемых терминов. Выпуск 75. К вантовая электроника. Академия наук СССР. Комитет научно-технической терминологии. 1984 г.]Тематики
Обобщающие термины
Синонимы
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Англо-русский словарь нормативно-технической терминологии > atomic second
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2 atomic second
English-Russian dictionary on nuclear energy > atomic second
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3 atomic second
Большой англо-русский и русско-английский словарь > atomic second
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4 atomic second
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5 atomic second
Техника: атомная секунда -
6 atomic second
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7 atomic second
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8 atomic second
The New English-Russian Dictionary of Radio-electronics > atomic second
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9 second
= s1) секундаа) единица измерения времени, сб) единица изменения углов, 1/3600 градуса2) малый период времени; мгновение3) второй4) вторичный5) вспомогательный; дополнительный; подчинённый; ведомый6) второстепенный; относящийся ко второму уровню ( иерархии)7) другой•- ephemeris second
- leap second
- sidereal second
- solar second -
10 second
1) секундаа) единица измерения времени, сб) единица изменения углов, 1/3600 градуса2) малый период времени; мгновение3) второй4) вторичный5) вспомогательный; дополнительный; подчинённый; ведомый6) второстепенный; относящийся ко второму уровню ( иерархии)7) другой•- ephemeris second
- leap second
- sidereal second
- solar secondThe New English-Russian Dictionary of Radio-electronics > second
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11 second
1) секунда (1. единица времени 2. внесистемная единица плоского угла)2) вторая передача ( коробки скоростей)3) мн. ч. второсортная продукция4) мн. ч. мука с систем второго качества5) мн. ч. утфель или сахар второй кристаллизации• -
12 disintegrations per second
1.распадов в секунду2.число распадов в секундуEnglish-Russian dictionary on nuclear energy > disintegrations per second
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13 physical second
атомная секунда
физическая секунда
Интервал времени, равный 9192 631 770,0 периодам колебаний цезиевого репера частоты.
[Сборник рекомендуемых терминов. Выпуск 75. К вантовая электроника. Академия наук СССР. Комитет научно-технической терминологии. 1984 г.]Тематики
Обобщающие термины
Синонимы
EN
DE
FR
Англо-русский словарь нормативно-технической терминологии > physical second
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14 centimeter-gram-second unit
English-Russian dictionary on nuclear energy > centimeter-gram-second unit
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15 атомная секунда
Большой англо-русский и русско-английский словарь > атомная секунда
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16 атомная секунда
Англо-русский словарь технических терминов > атомная секунда
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17 Essen, Louis
SUBJECT AREA: Horology[br]b. 6 September 1908 Nottingham, England[br]English physicist who produced the first practical caesium atomic clock, which was later used to define the second.[br]Louis Essen joined the National Physical Laboratory (NPL) at Teddington in 1927 after graduating from London University. He spent his whole working life at the NPL and retired in 1972; his research there was recognized by the award of a DSc in 1948. At NPL he joined a team working on the development of frequency standards using quartz crystals and he designed a very successful quartz oscillator, which became known as the "Essen ring". He was also involved with radio frequency oscillators. His expertise in these fields was to play a crucial role in the development of the caesium clock. The idea of an atomic clock had been proposed by I.I.Rabbi in 1945, and an instrument was constructed shortly afterwards at the National Bureau of Standards in the USA. However, this device never realized the full potential of the concept, and after seeing it on a visit to the USA Essen was convinced that a more successful instrument could be built at Teddington. Assisted by J.V.L.Parry, he commenced work in the spring of 1953 and by June 1955 the clock was working reliably, with an accuracy that was equivalent to one second in three hundred years. This was significantly more accurate than the astronomical observations that were used at that time to determine the second: in 1967 the second was redefined in terms of the value for the frequency of vibration of caesium atoms that had been obtained with this clock.[br]Principal Honours and DistinctionsFRS 1960. Clockmakers' Company Tompion Gold Medal 1957. Physical Society C.V.Boys Prize 1957. USSR Academy of Science Popov Gold Medal 1959.Bibliography1957, with J.V.L.Parry, "The caesium resonator as a standard of frequency and time", Philosophical Transactions of the Royal Society (Series A) 25:45–69 (the first comprehensive description of the caesium clock).Further ReadingP.Forman, 1985, "Atomichron: the atomic clock from concept to commercial product", Proceedings of the IEEE 75:1,181–204 (an authoritative critical review of the development of the atomic clock).N.Cessons (ed.), 1992, The Making of the Modern World, London: Science Museum, pp.190–1 (contains a short account).See also: Marrison, Warren AlvinDV -
18 weapon
n1) оружие; вооружение2) средство•to accept nuclear weapons on one's territory — допускать размещение ядерного оружия на своей территории
to battle-test one's weapons — проводить боевые испытания своего оружия
to block the supply of weapons from... — препятствовать поставкам оружия откуда-л.
to buy weapons from a country — закупать оружие у какой-л. страны
to carry nuclear weapons — иметь ядерное оружие (о самолете, судне)
to counter the increased flow of weapons — принимать ответные меры в связи с усилением притока вооружений
to deliver nuclear weapons — доставлять / нести ядерное оружие
to destroy weapons — ликвидировать / уничтожать оружие
to deter the future use of chemical weapons — удерживать государства от применения в будущем химического оружия
to eliminate nuclear weapons from a territory — убирать ядерное оружие с какой-л. территории
to forego the future use of chemical weapons — отказываться от применения химического оружия в будущем
to freeze the modernization of one's weapons — замораживать модернизацию оружия
to guard against accidental or unauthorized use of nuclear weapons — предупреждать / исключать случайное или несанкционированное применение ядерного оружия
to halt development, production and deployment of nuclear weapons — прекращать разработку, производство и развертывание ядерного оружия
to halve the number of one's strategic nuclear weapons — сокращать наполовину объем своих стратегических ядерных вооружений
to hand in / over one's weapons — сдавать оружие
to keep weapons — хранить / не сдавать оружие
to lay down one's weapons — складывать оружие
to make atomic weapons — производить / создавать атомное оружие
to monitor chemical weapons — устанавливать контроль / следить за наличием химического оружия
to negotiate weapons away / down — договариваться о ликвидации оружия
to place nuclear weapons in a country — размещать ядерное оружие в какой-л. стране
to prevent the further spread of nuclear weapons — предотвращать дальнейшее распространение ядерного оружия
to resort to weapons — прибегать к оружию; пускать в ход оружие
to strive for substantial reduction in strategic nuclear weapons — добиваться существенного сокращения стратегических ядерных сил
to surrender one's weapons — сдавать / складывать оружие
to take one's strategic weapons off alert status — выводить свое стратегическое оружие из состояния повышенной боевой готовности
to turn in one's weapons — сдавать оружие
to use weapons against smb — использовать / применять ядерное оружие против кого-л.
- absolute weaponto withdraw nuclear weapons (from a country) in two phases — выводить ядерное оружие (из какой-л. страны) в два этапа
- accumulated weapons
- advanced weapon
- air-launched nuclear weapons
- alleged use of chemical weapons
- American-made weapons
- American-supplied weapons
- anti-missile weapon
- anti-satellite weapon
- arsenals of weapons
- ASAT weapon
- atomic weapon
- authorized to carry weapons
- bacteriological weapons
- ban on production of chemical weapons
- banning nuclear weapons from the sea bed
- barbaric weapon
- beam weapon
- beam-directed energy weapon
- binary weapon
- biological weapons
- captured weapon - complete weapon
- completed weapon
- consignment of weapons
- conventional weapons
- cosmic weapon
- counter-strike weapon
- covert stores of nuclear weapons
- cruel weapons
- cut in weapons
- cut-back in weapons
- dangerous weapon
- deadly weapon
- decommissioning of weapons
- defense weapon
- defensive weapon
- destruction of stockpiles of nuclear weapons
- deterrent weapons
- devastating weapons
- development of weapons
- directed-energy beam weapon
- elimination of weapons of mass destruction
- emplacement of nuclear weapons
- first generation weapon
- first-strike weapons
- first-use nuclear weapons
- first-use weapons
- fusion nuclear weapon
- fusion-type nuclear weapon
- genetic weapon
- genocidal weapons
- germ weapons
- guided weapon
- handover of weapons
- high tech weapons
- high technology weapons
- home-made weapons
- horror weapons
- hydrogen weapon
- ideological weapon
- illegal possession of weapons
- incoming weapons
- increase in weapons
- infrasonic weapon
- infrasound weapon
- inhumane weapons
- intercontinental weapons
- intermediate range weapon
- intermediate weapon
- knockoffs of American weapons
- land-launched nuclear weapons
- laser weapons
- lethal weapon
- limitation of nuclear weapons
- long-range weapons
- major weapons
- makeshift weapons
- mass destruction weapon
- means of nuclear weapon delivery
- medium-range weapon
- minor weapons
- mix of conventional and nuclear weapons
- modern weapons
- monstrous weapon
- multipurpose weapon
- nerve weapon
- neutron weapon
- new generation of chemical weapons
- new-model weapons
- new-type weapons
- non-atomic weapons
- nondissemination of nuclear weapons and knowledge
- non-nuclear weapons - nuclear-missile weapons
- offensive weapons
- output of weapons
- particle-beam weapons
- perfidious weapon
- poisonous weapons
- political weapon
- potent weapon
- powerful weapon
- precision weapon
- price weapon
- production of weapons
- prohibition of chemical weapons
- prohibition of development of new types and systems of weapons of mass destruction
- proliferation of nuclear weapons
- ray weapon
- reduction in weapons
- reduction of weapons
- region bristling with weapons
- renunciation of atomic, chemical and bacteriological weapons
- restrains on nuclear weapons
- retaliation weapon
- retaliatory weapon
- riot control weapons
- satellite laser weapon
- sea-launched nuclear weapons
- second generation weapon
- secret weapon
- short-range weapon
- smart weapons
- sophisticated weapons
- space weapons
- space-based weapons
- space-launched nuclear weapons
- specific weapons
- spiritual weapon - stock of weapons
- stockpile of weapons
- stockpiling of weapons
- strategic weapons
- strike weapons
- superhigh-frequency weapons
- superiority in conventional weapons
- supersophisticated weapon
- surprise weapon
- surrender of weapons
- survivable weapons
- tactical weapon
- testing of nuclear weapons
- theatre nuclear weapons
- thermonuclear weapon
- third generation weapon
- toxic weapon
- toxin weapon
- treacherous weapon
- type of weapon
- ultimate weapon
- unconventional weapons
- unmanned weapon
- untried weapon
- use of weapons
- vengeful weapon
- weapon of blackmail
- weapon of mass annihilation
- weapon of mass extermination
- weapon of mass total destruction
- weapon of offence
- weapons at the ready
- weapons of war
- weapons of warfare
- withdrawal of nuclear weapons from Europe
- world without weapons
- X-ray laser weapon -
19 Appleton, Sir Edward Victor
[br]b. 6 September 1892 Bradford, Englandd. 21 April 1965 Edinburgh, Scotland[br]English physicist awarded the Nobel Prize for Physics for his discovery of the ionospheric layer, named after him, which is an efficient reflector of short radio waves, thereby making possible long-distance radio communication.[br]After early ambitions to become a professional cricketer, Appleton went to St John's College, Cambridge, where he studied under J.J.Thompson and Ernest Rutherford. His academic career interrupted by the First World War, he served as a captain in the Royal Engineers, carrying out investigations into the propagation and fading of radio signals. After the war he joined the Cavendish Laboratory, Cambridge, as a demonstrator in 1920, and in 1924 he moved to King's College, London, as Wheatstone Professor of Physics.In the following decade he contributed to developments in valve oscillators (in particular, the "squegging" oscillator, which formed the basis of the first hard-valve time-base) and gained international recognition for research into electromagnetic-wave propagation. His most important contribution was to confirm the existence of a conducting ionospheric layer in the upper atmosphere capable of reflecting radio waves, which had been predicted almost simultaneously by Heaviside and Kennelly in 1902. This he did by persuading the BBC in 1924 to vary the frequency of their Bournemouth transmitter, and he then measured the signal received at Cambridge. By comparing the direct and reflected rays and the daily variation he was able to deduce that the Kennelly- Heaviside (the so-called E-layer) was at a height of about 60 miles (97 km) above the earth and that there was a further layer (the Appleton or F-layer) at about 150 miles (240 km), the latter being an efficient reflector of the shorter radio waves that penetrated the lower layers. During the period 1927–32 and aided by Hartree, he established a magneto-ionic theory to explain the existence of the ionosphere. He was instrumental in obtaining agreement for international co-operation for ionospheric and other measurements in the form of the Second Polar Year (1932–3) and, much later, the International Geophysical Year (1957–8). For all this work, which made it possible to forecast the optimum frequencies for long-distance short-wave communication as a function of the location of transmitter and receiver and of the time of day and year, in 1947 he was awarded the Nobel Prize for Physics.He returned to Cambridge as Jacksonian Professor of Natural Philosophy in 1939, and with M.F. Barnett he investigated the possible use of radio waves for radio-location of aircraft. In 1939 he became Secretary of the Government Department of Scientific and Industrial Research, a post he held for ten years. During the Second World War he contributed to the development of both radar and the atomic bomb, and subsequently served on government committees concerned with the use of atomic energy (which led to the establishment of Harwell) and with scientific staff.[br]Principal Honours and DistinctionsKnighted (KCB 1941, GBE 1946). Nobel Prize for Physics 1947. FRS 1927. Vice- President, American Institute of Electrical Engineers 1932. Royal Society Hughes Medal 1933. Institute of Electrical Engineers Faraday Medal 1946. Vice-Chancellor, Edinburgh University 1947. Institution of Civil Engineers Ewing Medal 1949. Royal Medallist 1950. Institute of Electrical and Electronics Engineers Medal of Honour 1962. President, British Association 1953. President, Radio Industry Council 1955–7. Légion d'honneur. LLD University of St Andrews 1947.Bibliography1925, joint paper with Barnett, Nature 115:333 (reports Appleton's studies of the ionosphere).1928, "Some notes of wireless methods of investigating the electrical structure of the upper atmosphere", Proceedings of the Physical Society 41(Part III):43. 1932, Thermionic Vacuum Tubes and Their Applications (his work on valves).1947, "The investigation and forecasting of ionospheric conditions", Journal of theInstitution of Electrical Engineers 94, Part IIIA: 186 (a review of British work on the exploration of the ionosphere).with J.F.Herd \& R.A.Watson-Watt, British patent no. 235,254 (squegging oscillator).Further ReadingWho Was Who, 1961–70 1972, VI, London: A. \& C.Black (for fuller details of honours). R.Clark, 1971, Sir Edward Appleton, Pergamon (biography).J.Jewkes, D.Sawers \& R.Stillerman, 1958, The Sources of Invention.KFBiographical history of technology > Appleton, Sir Edward Victor
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20 Fermi, Enrico
[br]b. 29 September 1901 Rome, Italyd. 28 November 1954 Chicago, USA[br]Italian nuclear physicist.[br]Fermi was one of the most versatile of twentieth-century physicists, one of the few to excel in both theory and experiment. His greatest theoretical achievements lay in the field of statistics and his theory of beta decay. His statistics, parallel to but independent of Dirac, were the key to the modern theory of metals and the statistical modds of the atomic nucleus. On the experimental side, his most notable discoveries were artificial radioactivity produced by neutron bombardment and the realization of a controlled nuclear chain reaction, in the world's first nuclear reactor.Fermi received a conventional education with a chemical bias, but reached proficiency in mathematics and physics largely through his own reading. He studied at Pisa University, where he taught himself modern physics and then travelled to extend his knowledge, spending time with Max Born at Göttingen. On his return to Italy, he secured posts in Florence and, in 1927, in Rome, where he obtained the first Italian Chair in Theoretical Physics, a subject in which Italy had so far lagged behind. He helped to bring about a rebirth of physics in Italy and devoted himself to the application of statistics to his model of the atom. For this work, Fermi was awarded the Nobel Prize in Physics in 1938, but in December of that year, finding the Fascist regime uncongenial, he transferred to the USA and Columbia University. The news that nuclear fission had been achieved broke shortly before the Second World War erupted and it stimulated Fermi to consider this a way of generating secondary nuclear emission and the initiation of chain reactions. His experiments in this direction led first to the discovery of slow neutrons.Fermi's work assumed a more practical aspect when he was invited to join the Manhattan Project for the construction of the first atomic bomb. His small-scale work at Columbia became large-scale at Chicago University. This culminated on 2 December 1942 when the first controlled nuclear reaction took place at Stagg Field, Chicago, an historic event indeed. Later, Fermi spent most of the period from September 1944 to early 1945 at Los Alamos, New Mexico, taking part in the preparations for the first test explosion of the atomic bomb on 16 July 1945. President Truman invited Fermi to serve on his Committee to advise him on the use of the bomb. Then Chicago University established an Institute for Nuclear Studies and offered Fermi a professorship, which he took up early in 1946, spending the rest of his relatively short life there.[br]Principal Honours and DistinctionsNobel Prize for Physics 1938.Bibliography1962–5, Collected Papers, ed. E.Segrè et al., 2 vols, Chicago (includes a biographical introduction and bibliography).Further ReadingL.Fermi, 1954, Atoms in the Family, Chicago (a personal account by his wife).E.Segrè, 1970, Enrico Fermi, Physicist, Chicago (deals with the more scientific aspects of his life).LRD
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