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21 Kennelly-Heaviside layer
English-Ukrainian dictionary of aviation terms > Kennelly-Heaviside layer
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22 Heaviside-Kennelly layer
s.capa de Heaviside-Kennelly. -
23 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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24 Heaviside, Oliver
[br]b. 18 May 1850 London, Englandd. 2 February 1925 Torquay, Devon, England[br]English physicist who correctly predicted the existence of the ionosphere and its ability to reflect radio waves.[br]Brought up in poor, almost Dickensian, circumstances, at the age of 13 years Heaviside, a nephew by marriage of Sir Charles Wheatstone, went to Camden House Grammar School. There he won a medal for science, but he was forced to leave because his parents could not afford the fees. After a year of private study, he began his working life in Newcastle in 1870 as a telegraph operator for an Anglo-Dutch cable company, but he had to give up after only four years because of increasing deafness. He therefore proceeded to spend his time studying theoretical aspects of electrical transmission and communication, and moved to Devon with his parents in 1889. Because the operation of many electrical circuits involves transient phenomena, he found it necessary to develop what he called operational calculus (which was essentially a form of the Laplace transform calculus) in order to determine the response to sudden voltage and current changes. In 1893 he suggested that the distortion that occurred on long-distance telephone lines could be reduced by adding loading coils at regular intervals, thus creating a matched-transmission line. Between 1893 and 1912 he produced a series of writings on electromagnetic theory, in one of which, anticipating a conclusion of Einstein's special theory of relativity, he put forward the idea that the mass of an electric charge increases with its velocity. When it was found that despite the curvature of the earth it was possible to communicate over very great distances using radio signals in the so-called "short" wavebands, Heaviside suggested the presence of a conducting layer in the ionosphere that reflected the waves back to earth. Since a similar suggestion had been made almost at the same time by Arthur Kennelly of Harvard, this layer became known as the Kennelly-Heaviside layer.[br]Principal Honours and DistinctionsFRS 1891. Institution of Electrical Engineers Faraday Medal 1924. Honorary PhD Gottingen. Honorary Member of the American Association for the Advancement of Science.Bibliography1872. "A method for comparing electro-motive forces", English Mechanic (July).1873. Philosophical Magazine (February) (a paper on the use of the Wheatstone Bridge). 1889, Electromagnetic Waves.1892, Electrical Papers.1893–1912, Electromagnetic Theory.Further ReadingI.Catt (ed.), 1987, Oliver Heaviside, The Man, St Albans: CAM Publishing.P.J.Nahin, 1988, Oliver Heaviside, Sage in Solitude: The Life and Works of an Electrical Genius of the Victorian Age, Institute of Electrical and Electronics Engineers, New York.J.B.Hunt, The Maxwellians, Ithaca: Cornell University Press.See also: Appleton, Sir Edward VictorKF -
25 слой Е
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26 layer
2) горн. пласт7) вчт. уровень ( иерархической структуры)•layer free from base — кфт. бесподложечный слой-
ablation layer
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absorbed layer
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acceptor layer
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accumulation layer
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adsorbed layer
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alignment layer
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amorphous layer
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anode layer
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antihalation layer
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antireflection layer
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antireflective layer
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antistatic layer
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Appleton layer
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application layer
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as-grown layer
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atmospheric boundary layer
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back layer
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backing layer
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back-up layer
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ballast layer
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barrier layer
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base layer
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batch layer
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blending layer
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blocking layer
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bottom layer
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boundary layer
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buffer layer
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buried layer
-
cable layer
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cap layer
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cathode interface layer
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cathode layer
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chalcogenide layer
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Chapman layer
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chemisorption layer
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chilling layer
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chill layer
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cladding layer
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clad layer
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cloud layer
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cloud-topped boundary layer
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coal layer
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coil layers
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collector layer
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composite layer
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compression layer
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concentric layers
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conducting layer
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confining layer
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contact layer
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continuous layer
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convective unstable layer
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covering layer
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cushion layer
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D layer
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dan layer
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dead layer
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depletion layer
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deposited layer
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diamond-bearing layer
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dielectric layer
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diffused layer
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diffusion-source layer
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dipole layer
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dislocation layer
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doped layer
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drain layer
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driving layer
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dueling layer
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dummy layer
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dust layer
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E layer
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effective layer
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elastomer layer
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elevated layer
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embedded metal layer
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emitter layer
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emitting layer
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emulsion layer
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enriched layer
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epitaxial layer
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epoxy layer
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evaporated layer
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extension layer
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F layer
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fettled layer
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field oxide layer
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filter layer
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fog layer
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gate insulation layer
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ground layer
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gunned layer
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hanging layer
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heat-insulating layer
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Heaviside layer
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heavy layer
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high-concentration layer
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high-mobility layer
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hydraulic fill layer
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image receiving layer
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impurity layer
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insulating layer
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interface layer
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intermediate layer
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intrinsic layer
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inversion layer
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ion-implanted layer
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ionized layer
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ionospheric layer
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Kennelly-Heaviside layer
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light-sensitive layer
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link layer
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low-emission layer
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low-mobility layer
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masking layer
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metallic layer
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metallization layer
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moderating layer
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monoatomic layer
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monocrystalline layer
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monomolecular layer
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multiple layer
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n layer
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native layer
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negative layer
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network layer
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neutral layer
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nonconducting layer
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nonducting layer
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nucleating layer
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oceanic mixed layer
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ohmic layer
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oil layer
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ozone layer
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p layer
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paper layer
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passivation layer
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photoconductive layer
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photographic layer
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photosensitive layer
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physical layer
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physisorption layer
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planarization layer
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planetary boundary layer
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plank layer
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polycrystalline silicon layer
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poly silicon layer
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presentation layer
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protective layer
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receiving layer
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restraining layer
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sandwiched layer
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scattering layer
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scuff resisting layer
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sealing layer
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seal layer
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semiconducting layer
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separation layer
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session layer
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shallow diffused layer
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shallow layer
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sintered layer
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slag-impregnated surface layer
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solvent layer
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sporadic-E layer
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sputtered layer
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sputter layer
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stratified layers
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strip layers
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subbing layer
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subcloud layer
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substrate layer
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subsurface layer
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superconducting layer
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supernatant layer
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surface layer
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thermal boundary layer
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transition layer
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transmission control layer
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transparent layer
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transport layer
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trapping layer
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tropospheric layer
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turbulent boundary layer
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underglaze layer
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undoped layer
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unsteady boundary layer
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velocity boundary layer
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velocity layer
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wall boundary layer
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wearing layer
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web cross layers
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wind-mixed layer
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wire reinforcement layer
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wiring layer -
27 слой Е
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28 layer
1. страт, пласт, слой; прослоек; наслоение 2. сейсмический слой
layer of disintegrated material слой выветрелого материала
layer of earth слой грунта, земной пласт
А layer слой А (сейсмическая область Земли, расположенная выше границы Мохоровичича)
abscission layer палеобот. слой сбрасывания
active layer мерзл, активный слой
annual layer годовой слой
annually thawed layer мерзл, активный слой
annulus layer кольцеобразный слой
В layer слой В (сейсмическая область Земли от подошвы литосферы до глубины 410 км)
barrier layer заграждающий [запирающий] слой
basaltic layer базальтовый слой
bottom layer подошвенный слой
boundary layer пограничный слой
С layer слой С (сейсмическая область Земли, расположенная на глубинах 410—1000 км)
Conrad layer слой Конрада
cortical layer кортикальный (наружный) слой (у радиолярий, граптолитов)
D layer слой D (сейсмическая область Земли на глубине от 1000 до 2900 км — нижняя мантия)
deep scattering layer глубинный рассеивающий слой
diffuse layer диффузионный слой
discontinuity layer слой раздела
double layer двойной слой
flow layer слой течения
fusellar layer фюзеллярный слой (у граптолитов)
G layer слой G (сейсмическая область Земли глубиной более 5160 км, отвечающая внутреннему ядру)
ground-ice layer слой погребённого льда
growth layer пал. кольцо роста
Н layer слой Н (в лесных почвах слой аморфного органического вещества)
hanging layer висячий слой; висячая кровля
heavy layer мощный слой
high-speed layer слой повышенных скоростей
humus layer см. Н layer
ice layer слой льда
intermediate layer прослоек, промежуточный слой
katatectic layer-кататектический слой
Kennelly-Heaviside layer слой Кеннелли — Хевисайда (ионизованный слой атмосферы)
L layer слой L (слой опавшей листвы на поверхности почвы)
lamellar layer пластинчатый слой
low-velocity layer слой пониженных скоростей
lubricating layer слой смазки (слой в складчатости срыва)
mixed layer слой перемешивания
porcelaneous layer фарфоровый [фарфоровидный] слой
primary layer первичный слой
prismatic layer призматический слой
secondary layer вторичный слой
separation layer палеобот. слой сбрасывания
shell layer ракушечный слой
skeleton layer скелетный слой
subsurface layer подповерхностный слой
suppermafrost layer надмерзлотный слой
surface layer поверхностный слой
thin layer тонкий [маломощный] слой
unbroken layer ненарушенный пласт
upper layer покрывающий [верхний] слой
weathered layer зона выветривания, зона малых скоростей, ЗМС
* * *• зона -
29 E-layer
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30 layer
1) слой; плёнка || формировать слой или слои; наносить плёнку2) прокладка; разделительный слой || использовать прокладку; разделять слоем3) расслаивать(ся); отслаиваться4) вчт уровень || вводить уровни; использовать многоуровневое представление (напр. иерархической системы)5) уровень шифрования, один из (последовательно применяемых неидентичных) шагов шифрования ( в блочных шифрах)•- layer of weaker air movement
- layer of weights
- accumulation layer
- adhesion layer
- Appleton layer
- application layer - barrier layer
- base layer
- Beilby layer
- blocking layer
- bonding layer
- bottom layer
- boundary layer
- buried layer
- cathode layer
- Chapman layer
- charge layer
- collector layer
- competitive layer
- confusion layer
- control layer
- D-layer
- data-link layer
- daytime layer
- dead layer
- depletionlayer
- deposited layer
- diffusion layer
- dipole layer
- doped layer
- ducting layer
- E-layer
- Es layer
- electroluminescent powder layer
- electron-barrier layer
- elevated layer
- embedded metal layer
- emitter layer
- enriched layer
- epitaxial layer
- evaporation layer
- F-layer
- F1 layer
- F2 layer
- fencing layer
- fused layer
- Gaussian-doped layer
- gettering layer
- Grossberg layer
- half-value layer - heteroepitaxial layer
- hidden layer of neural network
- hole-barrier layer
- homoepitaxial layer
- i-layer
- implanted layer
- input layer of neural network
- interfacial layer
- intrinsic layer
- inversion layer
- ion-implanted layer
- Kennelly-Heaviside layer
- Kohonen layer
- light-blocking layer
- link layer
- liquid-crystal layer
- low-latitude boundary layer
- metal layer
- metallization layer
- microtwinned layer
- microvia layer
- momentum boundary layer
- n-layer
- narrow band-gap layer
- near-intrinsic layer
- network layer
- neural layer
- optical waveguiding layer
- output layer of neural network
- overgrown layer
- oxide layer
- ozone layer
- p-layer
- passivation layer
- phosphor layer
- photoconductive control layer
- physical layer
- pi layer
- plasma sheet boundary layer
- polysilicon layer
- presentation layer
- recording layer
- secure sockets layer
- self-assembled layer
- semi-transparent layer
- sensor layer
- separating layer
- session layer
- signal layer
- space-charge layer
- spontaneous inversion layer
- sporadic-E layer
- surface boundary layer
- swept-out layer
- transaction layer
- transition layer
- transport layer
- tropospheric layer
- unswept layer
- unswept epitaxial layer
- vacuum-deposited layer
- vacuum-evaporated layer
- wide band-gap layer
- wiring layer
- ν-layer
- π-layer -
31 layer
1) слой; плёнка || формировать слой или слои; наносить плёнку2) прокладка; разделительный слой || использовать прокладку; разделять слоем3) расслаивать(ся); отслаиваться4) вчт. уровень || вводить уровни; использовать многоуровневое представление (напр. иерархической системы)5) уровень шифрования, один из (последовательно применяемых неидентичных) шагов шифрования ( в блочных шифрах)•- ν layer- π layer
- accumulation layer
- adhesion layer
- Appleton layer
- application layer
- ATM adaptation layer
- atom layer
- barrier layer
- base layer
- Beilby layer
- blocking layer
- bonding layer
- bottom layer
- boundary layer
- buried layer
- cathode layer
- Chapman layer
- charge layer
- collector layer
- competitive layer
- confusion layer
- control layer
- D layer
- data-link layer
- daytime layer
- dead layer
- depletion layer
- deposited layer
- diffusion layer
- dipole layer
- doped layer
- ducting layer
- E layer
- Es layer
- electroluminescent powder layer
- electron-barrier layer
- elevated layer
- embedded metal layer
- emitter layer
- enriched layer
- epitaxial layer
- evaporation layer
- F layer
- F2 layer
- F1 layer
- fencing layer
- fused layer
- Gaussian-doped layer
- gettering layer
- Grossberg layer
- half-value layer
- hardware abstraction layer
- Heaviside layer
- heteroepitaxial layer
- hidden layer of neural network
- hole-barrier layer
- homoepitaxial layer
- i layer
- implanted layer
- input layer of neural network
- interfacial layer
- intrinsic layer
- inversion layer
- ion-implanted layer
- Kennelly-Heaviside layer
- Kohonen layer
- layer of units
- layer of weaker air movement
- layer of weights
- light-blocking layer
- link layer
- liquid-crystal layer
- low-latitude boundary layer
- metal layer
- metallization layer
- microtwinned layer
- microvia layer
- momentum boundary layer
- n layer
- narrow band-gap layer
- near-intrinsic layer
- network layer
- neural layer
- optical waveguiding layer
- output layer of neural network
- overgrown layer
- oxide layer
- ozone layer
- p layer
- passivation layer
- phosphor layer
- photoconductive control layer
- physical layer
- pi layer
- plasma sheet boundary layer
- polysilicon layer
- presentation layer
- recording layer
- secure sockets layer
- self-assembled layer
- semi-transparent layer
- sensor layer
- separating layer
- session layer
- signal layer
- space-charge layer
- spontaneous inversion layer
- sporadic-E layer
- surface boundary layer
- swept-out layer
- transaction layer
- transition layer
- transport layer
- tropospheric layer
- unswept epitaxial layer
- unswept layer
- vacuum-deposited layer
- vacuum-evaporated layer
- wide band-gap layer
- wiring layerThe New English-Russian Dictionary of Radio-electronics > layer
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32 layer
слой@absorbing layerпоглощающий слой@antihalation layerпротивоореольный слой@Appleton layerобласть слоев F1 и F2 ионосферы, слой F ионосферы@atmospheric layersатмосферные слои@B-layerслой В ионосферы@bifurcated layerслой (ионосферы Земли), разделенный на подслои@C-layerслой С ионосферы@Chapman layerслой D ионосферы@cloud layerоблачный слой@coronal layer of nebulaкорональный слой туманности@D-layerслой D ионосферы@disturbing layerвозмущающий слой@dust layerпылевой слой@Е-layerслой Е (Хевисайда-Кеннели) ионосферы@F-layerслой F ионосферы@G-layerслой G ионосферы@hydrogen layerслой (межзвездного) водорода@ionospheric layerионосфера@Kennelly-Heaviside layerслой Е ионосферы@neutral hydrogen layerслой нейтрального водорода (в Галактике)@ozone layerозоновый слой@photospheric layerфотосферный слой@reversing layerобращающий слой (Солнца)@surface layerповерхностный слой@tubid layerмутный слой (в атмосфере)@turbulent layerтурбулентный слой@violet layerфиолетовый слой (в атмосфере Марса)@ -
33 E-layer
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34 Broadcasting
See also: INDEX BY SUBJECT AREA[br] -
35 Eccles, William Henry
[br]b. 23 August 1875 Ulverston, Cumbria, Englandd. 27 April 1966 Oxford, England[br]English physicist who made important contributions to the development of radio communications.[br]After early education at home and at private school, Eccles won a scholarship to the Royal College of Science (now Imperial College), London, where he gained a First Class BSc in physics in 1898. He then worked as a demonstrator at the college and studied coherers, for which he obtained a DSc in 1901. Increasingly interested in electrical engineering, he joined the Marconi Company in 1899 to work on oscillators at the Poole experimental radio station, but in 1904 he returned to academic life as Professor of Mathematics and Physics and Department Head at South West Polytechnic, Chelsea. There he discovered ways of using the negative resistance of galena-crystal detectors to generate oscillations and gave a mathematical description of the operation of the triode valve. In 1910 he became Reader in Engineering at University College, London, where he published a paper explaining the reflection of radio waves by the ionosphere and designed a 60 MHz short-wave transmitter. From 1916 to 1926 he was Professor of Applied Physics and Electrical Engineering at the Finsbury City \& Guilds College and a private consulting engineer. During the First World War he was a military scientific adviser and Secretary to the Joint Board of Scientific Societies. After the war he made many contributions to electronic-circuit development, many of them (including the Eccles-Jordan "flip-flop" patented in 1918 and used in binary counters) in conjunction with F.W.Jordan, about whom little seems to be known. Illness forced Eccles's premature academic retirement in 1926, but he remained active as a consultant for many years.[br]Principal Honours and DistinctionsFRS 1921. President, Institution of Electrical Engineers, 1926–7. President, Physical Society 1929. President, Radio Society of Great Britain.Bibliography1912, "On the diurnal variation of the electric waves occurring in nature and on the propagation of electric waves round the bend of the earth", Proceedings of the Royal Society 87:79. 1919, with F.W.Jordan, "Method of using two triode valves in parallel for generating oscillations", Electrician 299:3.1915, Handbook of Wireless Telegraphy.1921, Continuous Wave Wireless Telegraphy.Further Reading1971, "William Henry Eccles, 1875–1966", Biographical Memoirs of the Royal Society, London, 17.KF -
36 Electricity
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37 Electronics and information technology
See also: INDEX BY SUBJECT AREA[br]Byron, Ada AugustaNapier, JohnRiche, Gaspard-Clair-François-MarieSchickhard, WilhelmBiographical history of technology > Electronics and information technology
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38 Pierce, George Washington
SUBJECT AREA: Electronics and information technology[br]b. 11 January 1872 Austin, Texas, USAd. 25 August 1956 Franklin, New Hampshire, USA[br]American physicist who made various contributions to electronics, particularly crystal oscillators.[br]Pierce entered the University of Texas in 1890, gaining his BSc in physics in 1893 and his MSc in 1894. After teaching and doing various odd jobs, in 1897 he obtained a scholarship to Harvard, obtaining his PhD three years later. Following a period at the University of Leipzig, he returned to the USA in 1903 to join the teaching staff at Harvard, where he soon established new courses and began to gain a reputation as a pioneer in electronics, including the study of crystal rectifiers and publication of a textbook on wireless telegraphy. In 1912, with Kennelly, he conceived the idea of motional impedance. The same year he was made first Director of Harvard's Cruft High- Tension Electrical Laboratory, a post he held until his retirement. In 1917 he was appointed Professor of Physics, and for the remainder of the First World War he was also involved in work on submarine detection at the US Naval Base in New London. In 1921 he was appointed Rumford Professor of Physics and became interested in the work of Walter Cady on crystal-controlled circuits. As a result of this he patented the Pierce crystal oscillator in 1924. Having discovered the magnetostriction property of nickel and nichrome, in 1928 he also invented the magnetostriction oscillator. The mercury-vapour discharge lamp is also said to have been his idea. He became Gordon McKay Professor of Physics and Communications in 1935 and retired from Harvard in 1940, but he remained active for the rest of his life with the study of sound generation by birds and insects.[br]Principal Honours and DistinctionsPresident, Institute of Radio Engineers 1918–19. Institute of Electrical and Electronics Engineers Medal of Honour 1929.Bibliography1910, Principles of Wireless Telegraphy.1914, US patent no. 1,450,749 (a mercury vapour tube control circuit). 1919, Electrical Oscillations and Electric Waves.1922, "The piezo-electric Resonator", Proceedings of the Institute of Radio Engineers 10:83.Further ReadingF.E.Terman, 1943, Radio Engineers'Handbook, New York: McGraw-Hill (for details of piezo-electric crystal oscillator circuits).KFBiographical history of technology > Pierce, George Washington
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39 Telecommunications
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40 E-layer
См. также в других словарях:
Kennelly — is a surname and may refer to:* Ardyth Kennelly, American novelist * Arthur Edwin Kennelly, American engineer * Barbara B. Kennelly, Connecticut Representative * Brendan Kennelly, Irish poet and novelist * Keala Kennelly, American surfer * Martin … Wikipedia
Kennelly — ist der Familienname folgender Personen: Arthur Edwin Kennelly (1861–1939), US amerikanischer Elektroingenieur Barbara B. Kennelly (* 1936), US amerikanische Politikerin Martin H. Kennelly (1887–1961), US amerikanischer Politiker Patrick Kennelly … Deutsch Wikipedia
Kennelly — Kennelly, Arthur Edwin … Enciclopedia Universal
Kennelly — [ kɛnəli], Brendan, irischer Dichter, Dramatiker und Kritiker, * Ballylongford (County Kerry) 17. 4. 1936; Professor für englische Literatur am Trinity College, Dublin; einer der produktivsten angloirischen Lyriker. Menschliche Unzulänglichkeit … Universal-Lexikon
Kennelly — Arthur Edwin Kennelly Arthur Edwin Kennelly, (17 décembre, 1861 18 juin, 1939), ingénieur en électricité américain, fils d un officier naval irlandais, né à Colaba près de Bombay, Inde, décédé à Boston, Massachusetts. Il est célèbre pour avoir… … Wikipédia en Français
Kennelly — noun United States electrical engineer noted for his work on the theory of alternating currents; independently of Oliver Heaviside he discovered the existence of an atmospheric layer that reflects radio waves back to earth (1861 1939) • Syn: ↑A.… … Useful english dictionary
Kennelly — Recorded in several spellings including Kennally, Keneally, Kenealy, Kennelly, Kinneally, Quinnelly, and others , this is a famous Irish surname. It derives from the pre 10th century Gaelic O Cinnfhaelidh, meaning The male descendant of the Wolf… … Surnames reference
Kennelly-Heaviside layer — [ken′əl ē hev′ē sīd΄] n. [after A. Kennelly (1861 1939), U.S. electrical engineer & O. Heaviside (1850 1925), Eng physicist] E LAYER … English World dictionary
Kennelly, Arthur Edwin — ▪ American electrical engineer born Dec. 17, 1861, Colaba, India died June 18, 1939, Boston U.S. electrical engineer who made innovations in analytic methods in electronics, particularly the definitive application of complex number theory… … Universalium
Kennelly-Heaviside layer — The Kennelly Heaviside layer, also known as the E region or simply the Heaviside layer, is a layer of ionised gas occurring at 90 ndash;150 km above the ground mdash; one of several layers in the Earth s ionosphere. It reflects medium frequency… … Wikipedia
Kennelly-Heaviside-Schicht — Ionosphärenschichten (engl. Layer) in Abhängigkeit von der Tageszeit Die Kennelly Heaviside Schicht, auch E Schicht genannt, ist ein Teil der Ionosphäre der Erde. Sie ist eine der Schichten der Ionosphäre an denen kurzwellige Radiosignale… … Deutsch Wikipedia