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41 Crookes, Sir William
SUBJECT AREA: Electricity[br]b. 17 June 1832 London, Englandd. 4 April 1919 London, England[br]English chemist and physicist who carried out studies of electrical discharges and cathode rays in rarefied gases, leading to the development of the cathode ray tube; discoverer of the element thallium and the principle of the Crookes radiometer.[br]Crookes entered the Royal College of Chemistry at the age of 15, and from 1850 to 1854 held the appointment of Assistant at the college. In 1854 he became Superintendent of the Meteorological Department at the Radcliffe Observatory in Oxford. He moved to a post at the College of Science in Chester the following year. Soon after this he inherited a large fortune and set up his own private laboratory in London. There he studied the nature of electrical discharges in gases at low pressure and discovered the dark space (later named after him) that surrounds the negative electrode, or cathode. He also established that the rays produced in the process (subsequently shown by J.J.Thompson to be a stream of electrons) not only travelled in straight lines, but were also capable of producing heat and/or light upon impact with suitable anode materials. Using a variety of new methods to investigate these "cathode" rays, he applied them to the spectral analysis of compounds of selenium and, as a result, in 1861 he discovered the element thallium, finally establishing its atomic weight in 1873. Following his discovery of thallium, he became involved in two main lines of research: the properties of rarified gases, and the investigation of the elements of the "rare earths". It was also during these experiments that he discovered the principle of the Crookes radiometer, a device in which light is converted into rotational motion and which used to be found frequently in the shop windows of English opticians. Also among the fruits of this work were the Crookes tubes and the development of spectacle lenses with differential ranges of radiational absorption. In the 1870s he became interested in spiritualism and acquired a reputation for his studies of psychic phenomena, but at the turn of the century he returned to traditional scientific investigations. In 1892 he wrote about the possibility of wireless telegraphy. His work in the field of radioactivity led to the invention of the spinthariscope, an early type of detector of alpha particles. In 1900 he undertook investigations into uranium which led to the study of scintillation, an important tool in the study of radioactivity.While the theoretical basis of his work has not stood the test of time, his material discoveries, observations and investigations of new facts formed a basis on which others such as J.J. Thomson were to develop subatomic theory. His later involvement in the investigation of spiritualism led to much criticism, but could be justified on the basis of a belief in the duty to investigate all phenomena.[br]Principal Honours and DistinctionsKnighted 1897. Order of Merit 1910. FRS 1863. President, Royal Society 1913–15. Honorary LLD Birmingham. Honorary DSc Oxon, Cambridge, Sheffield, Durham, Ireland and Cape of Good Hope.Bibliography1874, On Attraction and Repulsion Resulting from Radiation.1874, "Researches in the phenomenon of spiritualism", Society of Metaphysics; reprinted in facsimile, 1986.For many years he was also Proprietor and Editor of Chemical News.Further ReadingE.E.Fournier D'Albe, 1923, Life of Sir William Crookes. Who Was Who II, 1916–28, London: A. \& C. Black. T.I.Williams, 1969, A Biographical Dictionary of Scientists. See also Braun, Karl Ferdinand.KF / MG -
42 линейное кодирование
Русско-английский словарь по информационным технологиям > линейное кодирование
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43 карта
карта сущmapаэронавигационная карта1. air navigation chart2. aeronautical map 3. avigation chart аэронавигационная карта воздушных подходовaeronautical approach chartаэронавигационная карта мираworld aeronautical streamlineаэронавигационная маршрутная картаaeronautical route chartблок совмещения радиолокационного изображения с картойchart-matching deviceдополнительная картаsupplementary streamlineзадатчик угла картыchart angle selectorиндикатор движущейся картыmoving-map displayкарта аэродромных препятствийaerodrome obstruction chartкарта вертикальных сдвигов ветраvertical wind shear streamlineкарта верхних слоев атмосферыupper-air streamlineкарта выполнения регламентных работscheduled maintenance task cardкарта давленияpressure mapкарта для прокладывания курсаplotting chartкарта допусков и посадокfits and clearances cardкарта замера при определенных часах наработкиtime historyкарта замера уровня звукаsound level historyкарта магнитных склонений1. magnetic chart2. variation streamline карта максимальных ветровmaximum wind chartкарта местности зоны точного захода на посадкуprecision approach terrain chartкарта - наряд на выполнение регламентного технического обслуживанияscheduled maintenance recordкарта - наряд на выполнение технического обслуживанияmaintenance releaseкарта - наряд на техническое обслуживаниеmaintenance recordкарта опасных зонdanger areas chartкарта осмотраinspection recordкарта особых явлений погодыsignificant weather chartкарта особых явлений погоды в верхних слоях атмосферыhigh level significant weather chartкарта планирования полетов на малых высотахlow altitude flight planning chartкарта подходов к аэродромуaerodrome approach chartкарта полетаaerial mapкарта полетов1. flight chart2. flight map карта постоянного давленияconstant pressure chartкарта постоянных эшелоновconstant-level chartкарта потоковstreamlineкарта предполетного планированияpreflight planning chartкарта прогнозов1. prognostic chart2. forecast chart карта прогнозов на заданное времяfixed time prognostic chartкарта прогнозов приземных ветровprognostic surface chartкарта прогнозов состояния верхних слоев атмосферыprognostic upper air chartкарта районаarea chartкарта с навигационной сеткойgrid mapкарта суточного состояния погодыdaily weather mapкарта часов поясовtime-zone mapкаталог аэронавигационных картaeronautical chart catalogueленточная картаstrip streamlineмаршрутная карта1. en-route chart2. airway strip map 3. air route chart 4. route chart маршрутная карта полетов на малых высотахlow altitude en-route chartмедицинская картаmedical cardметеорологическая картаmeteorological chartобщая карта прогнозовcomposite prognostic chartподробная картаcomprehensive chartпрокладывать на карте маршрутchart a courseрадиолокационная карта1. radar map2. radar chart радионавигационная картаradio navigation chartСекция аэронавигационной информации и картAeronautical Information and Chart Section(ИКАО) синоптическая карта1. synoptic streamline2. weather map 3. synoptic map 4. weather streamline составление картыmappingсоставление карты дальнего обзораclose range mappingсредний масштаб картыmean scale of the chartтехнологическая карта осмотраinspection work cardтиповая картаmodel chartусловные обозначения маршрутных картen-route chart legendфаксимильная карта зональных прогнозовfacsimile area forecast chartчтение метеорологической картыinterpretation of weather chart -
44 scan
"In facsimile and other optical technologies, to move a light-sensitive device across an image-bearing surface such as a page of text, converting the light and dark areas on the surface to binary digits that can be interpreted by a computer."يمسح ضوئياً
См. также в других словарях:
facsimile — /fak sim euh lee/, n., v., facsimiled, facsimileing, adj. n. 1. an exact copy, as of a book, painting, or manuscript. 2. Also called fax. Telecommunications. a. a method or device for transmitting documents, drawings, photographs, or the like, by … Universalium
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fax — /faks/, Telecommunications. n. 1. facsimile (def. 2). adj. 2. facsimile (def. 5). v.t. 3. to transmit a facsimile of (printed matter, photographs, or the like) electronically: Fax the information to all our branch offices. [by shortening and resp … Universalium
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Junk Fax Prevention Act of 2005 — The Junk Fax Prevention Act (JFPA) of 2005, Pub L. No. 109 21, 119 Stat. 359 (2005), was passed by the United States Congress and signed into law by President George W. Bush on July 9, 2005. [http://www.whitehouse.gov/news/releases/2005/07/2005071… … Wikipedia
