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21 Joubert, Jules François
SUBJECT AREA: Electricity[br]b. 1834 Tours, Franced. 1910 Paris, France[br]French physicist, investigator of alternating-current wave-forms.[br]Joubert became Professor of Physics in the Collège Rollin, Paris, in 1874, a position he held until 1888. He was at one time General Secretary of the Société Française de Physique. In collaboration with Pasteur he began studies into the theories of germs and bacteria. In 1880 Joubert carried out research on wave-forms in alternating-current arc-lighting circuits. Reinventing a method previously used by earlier experimenters, including Wheatstone, he was, by a mechanical sampling technique, able to determine the voltage at different points in the cycle. By using a rotating contact on the alternator shaft, the angular position of which could be varied, the whole of the wave-form could be delineated. This successful technique was widely used for some thirty years.[br]Bibliography1880, "Sur les courants alternatifs et la force électromotive de l'arc électrique", Journal of Physics 9:297–303 (describes his experiments).Further Reading"Investigation of alternating current arcs", Electrician (1880) 5:151–2 (a report on Joubert's method).V.J.Phillips, 1987, Waveforms, Bristol (an extensive account of early methods of wave-form observation).W.Bulloch, 1938, The History of Bacteriology, Oxford; 1979, repub. New York.See also: Duddell, William du BoisGWBiographical history of technology > Joubert, Jules François
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22 логические схемы с переключением тока
1. current mode logic2. current sinking logic3. current steering logicРусско-английский большой базовый словарь > логические схемы с переключением тока
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23 лазер, генерирующий в непрерывном режиме
1) Engineering: continuous laser, continuous-wave laser, continuously running laser, current-wave laser2) Household appliances: continuously operating laser3) Makarov: (continuous-wave laser) CW laserУниверсальный русско-английский словарь > лазер, генерирующий в непрерывном режиме
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24 neprigušeni talas
• sustained current wave; undamped oscillations wave; undamped wave -
25 спектральная характеристика
1) Naval: spectrum pattern2) Military: colour response3) Engineering: color response curve, spectral characteristic, spectral response, spectrum, wavelength characteristic4) Oil: colour response curve5) Astronautics: current-wave-length characteristic6) Power engineering: current-wavelength characteristic (фотоэлемента)7) Household appliances: spectral response characteristic8) Microelectronics: spectral lasing9) Automation: spectral-response characteristic10) Makarov: spectral response curve (фотокатода), spectral response function11) Electrical engineering: BAX current-wavelength characteristic (фотоэлемента)Универсальный русско-английский словарь > спектральная характеристика
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26 характеристика
characterization, ( на герой) character sketch(на служебно лице) record(на работа на мамина) тех. performanceмат. characteristic* * *характерѝстика,ж., -и characterization, (на герой) character sketch; (на служебно лице) record, profile; техн. (на работа на машина) performance, response; мат. characteristic; волтамперна \характеристикаа current-voltage characteristic; експлоатационна \характеристикаа performance characteristic; импулсна \характеристикаа pulse response; светлинна \характеристикаа current-illumination characteristic; собствена честотна \характеристикаа natural frequency response; спектрална \характеристикаа current-wave characteristic; техническа \характеристикаа engineering characteristic; \характеристикаа на насоченост polar response.* * *characterization ; record {`rekxrd} (на служител)* * *1. (на работа на мамина) тех. performance 2. (на служебно лице) record 3. characterization, (на герой) character sketch 4. мат. characteristic -
27 лазер непрерывного излучения
1) Medicine: continuous-wave laser2) Military: continuously-operating laser3) Engineering: CW laser, continuous laser, current-wave laserУниверсальный русско-английский словарь > лазер непрерывного излучения
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28 переменноточная волна
Electrochemistry: a.c. wave, alternating current waveУниверсальный русско-английский словарь > переменноточная волна
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29 искажение формы кривой тока
Engineering: current wave-form distortion, current waveform distortionУниверсальный русско-английский словарь > искажение формы кривой тока
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30 вълна на тока
ел.current waveел.current waves -
31 Duddell, William du Bois
SUBJECT AREA: Electricity[br]b. 1872 Kensington, London, Englandd. 4 November 1917 London, England[br]English engineer, inventor of the first practical oscillograph.[br]After an education at the College of Stanislas, Cannes, Duddell served an apprenticeship with Davy Paxman of Colchester. Studying under Ayrton and Mather at the Central Technical College in South Kensington, he found the facilities for experimental work of exceptional value to him and remained there for some years. In 1897 Duddell produced a galvanometer which was sufficiently responsive to display an alternating-current wave-form. This instrument, with a coil carrying a mirror in the air gap of a powerful electromagnet, had a small periodic time. An oscillating mirror driven by a synchronous motor spread out the deflection on a time-scale. This development became the first commercial oscillograph and brought Duddell into prominence as a first-rate designer of special instruments. The Duddell oscillograph remained in use until after the Second World War, examples being used for recording short-circuit tests on high-power switchgear and other rapidly varying or transient phenomena. His next important work was to collaborate with Professor Marchant at Liverpool University to investigate the characteristics of the electric arc. This led to the suggestion that, coupled to a resonant circuit, the electric arc could form a generator of high-frequency currents. This arrangement was later developed by Poulson for wireless telegraphy. Duddell spent the last years of his life on government research as a member of the Admiralty Board of Inventions and Research and also of the Inventions Board of the Ministry of Munitions.[br]Principal Honours and DistinctionsCBE 1916. FRS 1907. Royal Society Hughes Medal 1912. President, Institution of Electrical Engineers 1912 and 1913.Bibliography1897, Electrician, 39:636–8 (describes his oscillograph). 5 March 1898, British patent no. 5,449 (the oscillograph).1899, with E.W.Marchant, "Experiments on alternate current arcs by aid of oscillograph", Journal of the Institution of Electrical Engineers 28: 1–107.Further ReadingV.J.Phillips, 1987, Waveforms, Bristol (a comprehensive account).1945, "50 years of scientific instrument manufacture", Engineering, 159:461.GWBiographical history of technology > Duddell, William du Bois
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32 волна полного комплексного тока
Makarov: total complex current waveУниверсальный русско-английский словарь > волна полного комплексного тока
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33 волна тока
Engineering: current wave -
34 волна тока пучка
Makarov: beam-current wave -
35 волна полного комплексного тока
Русско-английский физический словарь > волна полного комплексного тока
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36 волна тока пучка
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37 Stromwelle
Stromwelle f current waveDeutsch-Englisch Wörterbuch der Elektrotechnik und Elektronik > Stromwelle
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38 spektraaliherkkyyden ominaiskäyrä
• characteristic curve of spectral sensitivity• current wave-length charasteristicSuomi-Englanti sanakirja > spektraaliherkkyyden ominaiskäyrä
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39 спектральная характеристика
1. current-wave-length characteristic2. spectral responseпереходная характеристика; реакция на скачок — step response
Русско-английский словарь по информационным технологиям > спектральная характеристика
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40 corrente
"current;Strom;corrente"* * *1. adj currentacqua runninglingua fluentdi uso corrente in common use2. m: essere al corrente know (di something)tenere qualcuno al corrente keep someone up to date, keep someone informed3. f currentfig di opinione trendfazione factioncorrente continua direct currentcorrente d'aria draught* * *corrente1 agg.1 ( che scorre) running, flowing: acqua corrente, running water // (mar.) manovre correnti, running rigging // (tip.) titolo corrente, running head (o running title)2 ( scorrevole) flowing, smooth, fluent: uno stile corrente, a smooth style; esprimersi in modo corrente, to speak fluently4 ( nelle specificazioni di tempo) present, current: mese corrente, current month; in risposta alla Vs. del 14 c.m., in reply to your letter of the 14th instant (o of this month); settimana corrente, current week6 ( comune) common, current, ordinary: nel linguaggio corrente, in common speech; opinione corrente, current opinion; parola di uso corrente, word in current (o common) use; secondo l'uso corrente, according to current use7 ( andante, dozzinale) common; ordinary; ( nella terminologia commerciale) middling: materiale corrente, common material; qualità corrente, middling quality◆ s.m.1 al corrente, informed (o up to date o well informed): lo mise al corrente della nostra decisione, he acquainted him with (o informed him of) our decision, essere al corrente di un fatto, to be well informed about (o to be acquainted with) a fact; tenere qlcu. al corrente di qlco., to keep s.o. well informed (o posted) on sthg.; tenersi al corrente, to keep up to date2 (arch., mar., aer.) stringer.corrente2 s.f.1 current, stream; ( molto veloce) race: corrente di marea, riptide; corrente di flusso, flood current; corrente di riflusso, ebb current; corrente di risucchio, rip current; corrente sottomarina, undercurrent; la corrente impetuosa del fiume, the river's strong current; il nuotatore fu travolto dalla corrente, the swimmer was swept away by the current; nuotare contro corrente, to swim against the current; andare contro corrente, to swim against the stream (anche fig.); seguire la corrente, to go (o to swim) with the tide (anche fig.) // la Corrente del Golfo, the Gulf Stream2 ( di aria) draught; current of air: entrò una corrente d'aria fredda quando apristi la finestra, a cold draught came in when you opened the window; non state nella corrente!, don't stand in the draught!; chiudi la porta: fa corrente!, close the door! there's a draught // (meteor.): corrente ascensionale, updraught; corrente a getto, jet stream; corrente di convezione, convection current; correnti occidentali, westerlies3 ( flusso) stream, flow: corrente laminare, laminar flow; corrente di traffico, traffic flow; la corrente dell'esportazione, the flow of exports4 (elettr.) current: corrente a bassa tensione, low-voltage current; corrente ad alta tensione, high-voltage current; corrente alternata, alternate current; corrente continua, direct current; corrente derivata, derived current; corrente di compensazione, equalizing current; corrente di ritardo, lagging current; corrente di spostamento, displacement current; corrente efficace, effective current; corrente indotta, induced current; corrente parassita, eddy current; presa di corrente, current tap (o socket); riduttore di corrente, instrument current transformer; siamo rimasti senza corrente per tutta la notte, we were without electricity all night; accidenti! è saltata la corrente!, damn! the power (o current) has gone!5 (fig.) ( usanza) fashion; ( tendenza) current, tendency, trend: corrente letteraria, literary current; le correnti del pensiero moderno, the tendencies of modern thought* * *[kor'rɛnte]1. agg1) (acqua del rubinetto) running2) (uso, anno) current, (moneta) validè opinione corrente che... — it is commonly believed that...
la vostra lettera del 5 corrente mese — (in lettere commerciali) in your letter of the 5th of this month, in your letter of the 5th inst. Brit frm
3) (ordinario: merce) ordinary4) (quotidiano: spese, affari) everyday2. smessere al corrente di — (notizia) to know about, (scoperte scientifiche) to be well-informed about
3. sfElettr, (di acque) current, (di aria) airstream, current of air, (spiffero) draught Brit, draft Am, (di opinioni) trendtagliare la corrente Elettr — to cut off the power
* * *I [kor'rɛnte]1) (diffuso, frequente) [pratica, errore, mentalità, parola] common, currentdi uso corrente — in current o common o everyday use
2) (ordinario) [ lingua] everyday; [procedura, funzionamento] usual, ordinary; [tariffa, tasso] going3) (con riferimento temporale) [settimana, mese, anno] currentil 5 del mese corrente — the 5th of this month, the 5th inst
4) (che scorre) [ acqua] running, flowing5) al correnteessere al corrente — to be in the know (di qcs. about sth.); to be aware (di qcs. of sth.)
mettere qcn. al corrente — to put sb. in the picture, to fill sb. in (di qcs. about sth.)
tenere qcn. al corrente — to keep sb. posted, to let sb. know (di qcs. about sth.)
II [kor'rɛnte]tenersi al corrente — to keep up to date (di qcs. on sth.)
sostantivo femminile1) (movimento dell'acqua) currentcontro corrente — [ nuotare] against the current o tide; fig. [ andare] against the tide o trend
seguire la corrente — to go with the tide o current, to go downstream; fig. to go with the flow
2) (d'aria) draught BE, draft AE3) aer. meteor. current4) el. currentstaccare la corrente — to switch o turn off the power o electricity
manca, è saltata la corrente — there's no power, the power has failed
5) (tendenza, movimento) trend, current•corrente atmosferica — aer. air flow; meteor. airstream
* * *corrente1/kor'rεnte/1 (diffuso, frequente) [pratica, errore, mentalità, parola] common, current; di uso corrente in current o common o everyday use2 (ordinario) [ lingua] everyday; [procedura, funzionamento] usual, ordinary; [tariffa, tasso] going; moneta corrente currency3 (con riferimento temporale) [settimana, mese, anno] current; il 5 del mese corrente the 5th of this month, the 5th inst.4 (che scorre) [ acqua] running, flowing5 al corrente essere al corrente to be in the know (di qcs. about sth.); to be aware (di qcs. of sth.); mettere qcn. al corrente to put sb. in the picture, to fill sb. in (di qcs. about sth.); tenere qcn. al corrente to keep sb. posted, to let sb. know (di qcs. about sth.); tenersi al corrente to keep up to date (di qcs. on sth.).————————corrente2/kor'rεnte/sostantivo f.1 (movimento dell'acqua) current; contro corrente [ nuotare] against the current o tide; fig. [ andare] against the tide o trend; seguire la corrente to go with the tide o current, to go downstream; fig. to go with the flow3 aer. meteor. current4 el. current; corrente elettrica electric current; staccare la corrente to switch o turn off the power o electricity; manca, è saltata la corrente there's no power, the power has failed5 (tendenza, movimento) trend, current; una corrente politica a political trend; una corrente di pensiero a current of thought6 (spostamento) le -i migratorie migratory movementscorrente alternata alternating current; corrente atmosferica aer. air flow; meteor. airstream; corrente continua direct current; corrente del Golfo Gulf Stream; corrente marina drift.
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