-
41 EAR
1. electromagnetic activity receiver - приёмник электромагнитного излучения;2. electronic audio recognition - распознавание звуковых сигналов с помощью электронных средств;3. electronically agile radar - бортовая самолётная РЛС с фазированной антенной решёткой с электронным сканированием; РЛС с электронным сканированием луча; ФАР;4. event analysis report - отчёт по анализу происшествия;5. experimental array radar - РЛС с экспериментальной антенной решёткой -
42 radiation
1) излучение; радиация3) энергия излучения; лучистая энергия•- atmospheric radiation
- backfire radiation
- background radiation
- backscattered radiation
- backward radiation
- band-to-band radiation
- blackbody radiation
- broadside radiation
- Cerenkov radiation
- characteristic radiation
- coherent radiation
- complex radiation
- concomitant radiation
- cosmic radiation
- cyclotron radiation
- diffracted radiation
- direct radiation
- directed radiation
- electromagnetic radiation
- EM radiation
- end-fire radiation
- end-on radiation
- far-field radiation
- far-infrared radiation
- far-zone radiation
- forward-scattered radiation
- free-free transition radiation
- free-space radiation
- fringe radiation
- giant-pulse radiation
- Hertzian radiation
- horizontally polarized radiation
- impact radiation
- incident radiation
- incoherent radiation
- infrared radiation
- ionizing radiation
- Josephson radiation
- laser radiation
- leakage radiation
- local-oscillator radiation
- low radiation
- low-angle radiation
- maser radiation
- microwave radiation
- middle-infrared radiation
- monitor radiation
- monochromatic radiation
- multimodal radiation
- multimode radiation
- multipole radiation
- natural radiation
- near-infrared radiation
- near-ultraviolet radiation
- near-UV radiation
- noncoherent radiation
- nonionizing radiation
- nonpolarized radiation
- nuclear radiation
- omnidirectional radiation
- optical radiation
- oscillator radiation
- out-of-band radiation
- penetrating radiation
- polarized radiation
- primary radiation
- pumping radiation
- radio radiation
- Raman radiation
- Rayleigh radiation
- receiver radiation
- recombination radiation
- relict radiation
- residual radiation
- resonance radiation
- scattered radiation
- secondary radiation
- side-lobe radiation
- single-mode radiation
- sky radiation
- space radiation
- spontaneous radiation
- spurious radiation
- steady-state radiation
- stimulated radiation
- Stokes radiation
- stray radiation
- sub-mm radiation
- terrestrial radiation
- thermal radiation
- thermal radio radiation
- transient radiation
- ultraviolet radiation
- vacuum-UV radiation
- VDT radiation
- vertically polarized radiation
- video display terminal radiation
- visible radiation -
43 radiation
1) излучение; радиация3) энергия излучения; лучистая энергия•- atmospheric radiation
- backfire radiation
- background radiation
- backscattered radiation
- backward radiation
- band-to-band radiation
- blackbody radiation
- broadside radiation
- Cerenkov radiation
- characteristic radiation
- coherent radiation
- complex radiation
- concomitant radiation
- cosmic radiation
- cyclotron radiation
- diffracted radiation
- direct radiation
- directed radiation
- electromagnetic radiation
- EM radiation
- end-fire radiation
- end-on radiation
- far-field radiation
- far-infrared radiation
- far-zone radiation
- forward-scattered radiation
- free-free transition radiation
- free-space radiation
- fringe radiation
- giant-pulse radiation
- Hertzian radiation
- horizontally polarized radiation
- impact radiation
- incident radiation
- incoherent radiation
- infrared radiation
- ionizing radiation
- Josephson radiation
- laser radiation
- leakage radiation
- local-oscillator radiation
- low radiation
- low-angle radiation
- maser radiation
- microwave radiation
- middle-infrared radiation
- monitor radiation
- monochromatic radiation
- multimodal radiation
- multimode radiation
- multipole radiation
- natural radiation
- near-infrared radiation
- near-ultraviolet radiation
- near-UV radiation
- noncoherent radiation
- nonionizing radiation
- nonpolarized radiation
- nuclear radiation
- omnidirectional radiation
- optical radiation
- oscillator radiation
- out-of-band radiation
- penetrating radiation
- polarized radiation
- primary radiation
- pumping radiation
- radio radiation
- Raman radiation
- Rayleigh radiation
- receiver radiation
- recombination radiation
- relict radiation
- residual radiation
- resonance radiation
- scattered radiation
- secondary radiation
- side-lobe radiation
- single-mode radiation
- sky radiation
- space radiation
- spontaneous radiation
- spurious radiation
- steady-state radiation
- stimulated radiation
- Stokes radiation
- stray radiation
- sub-mm radiation
- terrestrial radiation
- thermal radiation
- thermal radio radiation
- transient radiation
- ultraviolet radiation
- vacuum-UV radiation
- VDT radiation
- vertically polarized radiation
- video display terminal radiation
- visible radiationThe New English-Russian Dictionary of Radio-electronics > radiation
-
44 unit
1) сборочная единица; узел; блок2) установка; агрегат3) единица, единица измерения || единичный; удельный4) часть; секция || секционный•as a unit — 1) в сборе 2) как единая сборочная единица; как единый узел
unit under test — 1) объект контроля 2) объект диагностирования, объект технического диагностирования
- AC unit- actuating unit
- adapter plate unit
- adaptive control unit
- address and data interface unit
- address unit
- adjusting unit
- air-aspirating unit
- answer-back unit
- arithmetic unit
- arithmetic/logic unit
- arithmetical unit
- ASC unit
- assembly unit of N-order
- assembly unit
- audio response unit
- autoloading unit
- automatic calling unit
- auxiliary data translator unit
- availability control unit
- axis unit
- axis-processing unit
- balancer unit
- banking unit
- bar feed unit
- base assembly unit
- base unit
- basic information unit
- basic length unit
- basic logic unit
- batch control unit
- bearing unit
- behind-the-tape reader unit
- belt shuttle unit
- belt-driven shuttle unit
- bench-testing unit
- blemished unit
- bolt-on unit
- booster unit
- boring spindle unit
- boring unit
- boring-and-milling unit
- brake unit
- broach retriever unit
- broach-handling unit
- broken tool sensing unit
- buffer unit
- building-block machining unit
- bulk transfer unit
- business unit
- card punching unit
- carousel loading unit
- carousel unit
- carrier unit
- cartridge unit
- cellular unit
- center unit for machine frame
- central processing unit
- central processor unit
- chain storage unit
- changer unit
- changing unit
- check unit
- chiller unit
- chip disposal unit
- clamping unit
- claw unit
- CNC machining unit
- CNC standard unit
- CNC unit
- coating application unit
- coating removal unit
- coherent unit
- column unit
- combination valve unit
- command unit
- communications central processing unit
- complementary unit
- computerized numerical control unit
- condensing unit
- cone variable-speed friction drive unit
- console unit
- constant coefficient unit
- constant delay unit
- construction unit
- control unit
- controlling unit
- conveying unit
- conveyor unit
- coolant management unit
- coolant recovery unit
- coolant unit
- cooler unit
- cooling unit
- coordinate preprogramming unit
- copying unit
- correction unit
- cover unit
- CPC handling unit
- cross tapping unit
- cross-slide unit
- cutoff unit
- cutting unit
- D unit
- damping unit
- data preparation unit
- data transmission control unit
- deep hole boring unit
- delay unit
- derived unit
- detecting unit
- detection unit
- developing unit
- digital display unit
- digital readout unit
- digital unit
- dimension readout unit
- diode array unit
- disk-type variable-speed friction drive unit
- displacement unit
- display unit
- distance-keeping unit
- double-acting unit
- double-notching unit
- double-pump and combination unit
- double-pump unit
- double-reduction gear unit
- double-reduction right-angle reduction gear unit
- double-reduction twin gear unit
- double-reduction twin unit
- double-reduction wormgear unit
- double-spindle unit
- down-hole internal deburrer unit
- dresser unit
- dressing unit
- drill unit
- drilling and milling unit
- drilling spindle unit
- drilling unit
- drilling/tapping unit
- drive unit
- drive/feed unit
- DRO unit
- dual work pallet shuttle unit
- dual-head laser beam unit
- dust-collecting unit
- dust-removing unit
- dynamic unit
- EDM unit
- electrical machining units
- electromagnetic unit
- electron-beam unit
- entry level dedicated unit
- environmental compensation unit
- exchanger unit
- fabricated unit
- facing unit
- fan coil unit
- feed box unit
- feed change unit
- feed drive cartridge unit
- feed unit
- feedback unit
- feed-in boring unit
- feed-out boring unit
- fetch-and-carry unit
- filtration unit
- fine boring unit
- flexible spindle units
- flexible tray unit
- floor unit
- focusing unit
- free-standing unit
- free-wheel unit
- free-wheeling unit
- frontal variable-speed friction drive unit
- functional unit
- fundamental unit
- gage control unit
- gage indicating unit
- gage unit
- gaging unit
- gas turbine starter auxiliary power unit
- gear unit
- gearbox unit
- gear-reversing unit
- grasping unit
- grinding spindle unit
- gripper unit
- guide unit
- handling unit
- hardware/software add-on unit
- harmonic drive unit
- head unit
- headstock-type workpiece holding unit
- hoisting unit
- horizontal power unit
- horizontal way unit
- hydraulic clamping unit
- hydraulic feed unit
- hydraulic power unit
- hydraulic testing unit
- hydraulic unit
- hydrostatic bearing unit
- ICAM manufacturing unit
- ICAM unit
- icon-driven control unit
- indexer/fourth axis unit
- indexing head unit
- indexing platen unit
- indexing table unit
- indexing unit
- in-die tapping unit
- information retrieval unit
- information unit
- input batch control unit
- input unit
- input-output unit
- in-system unit
- integral unit
- interface unit
- intermediate storage unit
- interpolating unit
- inverting unit
- keyboard unit
- knee-type unit
- lapping and superfinishing unit
- laser beam composition unit
- laser beam unit
- laser processing unit
- laser unit
- laser-calibration unit
- laser-source unit
- lead screw tap unit
- lexical unit
- lift unit
- lift-and-carry unit
- light unit
- linear ball bearing unit
- linear drive unit
- linear screw unit
- linear slide roller bearing unit
- linear unit
- live storage unit
- load/unload unit
- loading unit
- loading-and-unloading unit
- logic unit
- logical unit
- lubricating pump unit
- machine control unit
- machine tool control unit
- machine tooling unit
- machine unit
- machine-dedicated unit
- machining center unit
- machining head unit
- machining unit
- magnetic pickup unit
- magnetic tape unit
- manned flexible unit
- marking unit
- master unit
- material-handling unit
- MDI unit
- measurement unit
- measuring unit
- memory unit
- message display unit
- microdispensing unit
- microprocessor correction unit
- microprocessor NC unit
- microprocessor unit
- microprocessor-based unit
- microprocessor-type NC unit
- middle-level 3-D representation unit
- milling spindle unit
- minicomputer control unit
- miniload AS/RS unit
- mist coolant unit
- miter saw unit
- mobile unit
- mobile work storage unit
- modular cell unit
- modular loading unit
- modular unit
- motor unit
- motor-reduction unit
- multichannel analyzer unit
- multidrill unit
- multiple screw-driving unit
- multiple-power path gear unit
- multiple-reduction gear unit
- multiple-reduction unit
- multiple-spindle torque unit
- multipurpose machining unit
- multispindle boring unit
- multitap unit
- NC data creation unit
- NC unit
- nested gear unit
- notching unit
- nutating unit
- off-machine unit
- off-system unit
- oil coalescer unit
- oil-filled feed unit
- one stage gear unit
- one stage unit
- on-machine unit
- operation unit
- operational unit
- operator-friendly program unit
- orientation transfer unit
- output batch control unit
- output unit
- overhead gantry unit
- overhead spindle unit
- pack unit
- pallet change unit
- pallet exchange unit
- pallet shuttle unit
- pallet-pool unit
- parallel-shaft reduction gear unit
- PC expansion board unit
- PC-based CAD unit
- pendant control unit
- pendant pushbutton control unit
- pendant unit
- peripheral control unit
- peripheral processing unit
- photo-eye tracing unit
- pick-and-place unit
- pickup unit
- piece-holding unit
- pilot unit
- placement unit
- planetary gear unit
- planetary reduction gearing unit
- plant unit
- plasma-arc unit
- plasmarc unit
- platen unit
- PLC unit
- plugboard input unit
- plugboard unit
- plug-in unit
- pneumatic unit
- portable unit
- power feed unit
- power supply unit
- power train unit
- power unit
- power-generating unit
- power-tooling unit
- practical correction unit
- practical unit
- presetting unit
- pressurized air bearing unit
- primary storage unit
- probe unit
- processing unit
- production unit
- program unit
- programming unit
- propulsion unit
- pulling unit
- pump unit
- pumping unit
- pump-motor unit
- quill feed cam unit
- quill spindle unit
- quill unit
- raster unit
- readout unit
- reducing unit
- reduction gear unit
- reduction gearing unit
- reduction unit
- reed make contact unit
- regulating unit
- remote display unit
- replacement unit
- retriever unit
- right-angle milling unit
- right-angled milling unit
- robot power unit
- robot unit
- robot-transfer unit
- roller bearing unit
- roller unit
- roller-marking unit
- rotary unit
- rotating seal unit
- S unit
- scanning unit
- scheduling unit
- screen projection unit
- screwing unit
- sealed reed contact unit
- self-contained NC unit
- self-contained unit
- sensing unit
- sensor unit
- servo unit
- shankless boring unit
- sheet metal stamping automatic unit
- shop replaceable unit
- shuttle unit
- shuttle-and-lift unit
- side unit
- single-acting unit
- single-light unit
- single-reduction gear unit
- single-reduction unit
- sizing unit
- slant bed unit
- slave unit
- slide unit
- sliding table unit
- smallest replaceable unit
- spare unit
- speeder unit
- speed-increase unit
- speed-up spindle unit
- speed-up unit
- spindle box unit
- spindle cartridge unit
- spindle drive unit
- spindle unit
- stabilizing unit
- stand-alone unit
- standard build units
- starter auxiliary power unit
- static tooling unit
- steam generating unit
- stock feed unit
- storage unit
- stylus unit
- sub-multiple unit
- swing arm-mounted control unit
- tangent unit
- tapping unit
- teach control unit
- terminal control unit
- test unit
- testing unit
- thermal detecting unit
- tilting unit
- tolerance unit
- tool storage unit
- tool-presetting unit
- tool-spindle unit
- toroidal variable-speed friction drive unit
- track and store unit
- transfer unit
- transmission control unit
- transmission unit
- transmitter/receiver unit
- transport unit
- triple-reduction gear unit
- triple-reduction unit
- tuning unit
- turnaround unit
- turning spindle unit
- turnround unit
- turret unit
- twin gear unit
- twin saw unit
- twin-drive unit
- twin-screen unit
- unit of displacement
- unit of measure
- unit of measurement
- unit of physical quantity
- unit of product
- unit of work per unit of time
- unmanned machining unit
- vacuum unit
- variable coefficient unit
- variable delay unit
- variable preload bearing unit
- variable ratio unit
- variable speed unit
- variable-speed friction drive unit
- V-axis grinding unit
- V-belt variable-speed drive unit
- V-drive unit
- vertical way unit
- vibratory feed unit
- vise unit
- visual display unit
- vocal output unit
- VTL unit
- waveform gear reduction unit
- wheel-dressing unit
- wheel-head unit
- wing unit
- wing-base unit
- work storage unit
- work-holding headstock unit
- workshop video unit
- work-testing unit
- worm reduction unit
- writing unit
- yet-to-be-assembled unitEnglish-Russian dictionary of mechanical engineering and automation > unit
-
45 guidance
управление; ркт. наведение; руководящие [директивные] указания; директива; руководствоstellar-inertia! guidance — астроинерциальное наведение, инерциальное наведение с астрокоррекцпей
terrain (contour) matching guidance — корреляционное наведение методом сопоставления эталонной картографической программы с РЛ отображением местности
— beam climber guidance— celestial navigation guidance— fixed lead-angle guidance— gravitational correlation guidance— gravitational guidance— hyperbolic navigation guidance— instrumental guidance— launching-phase guidance— lead-angle guidance— proportional closure guidance— tracking guidance* * * -
46 UHF
(ultra high frequency) ультравысокие частоты, УВЧдециметровый диапазон ( decimeter waves, длины волн от 1 м до 10 см), частоты в диапазоне от 300 до 3000 МГц. Используются в телевизионном вещании, радиосвязи, мобильных телефонах, рациях, микроволновых печах и в радарных установкахАнгло-русский толковый словарь терминов и сокращений по ВТ, Интернету и программированию. > UHF
-
47 EAR
сокр. от electromagnetic activity receiverEnglish-Russian dictionary of telecommunications and their abbreviations > EAR
-
48 interference
•- adjacent-channel interference
- alternate-channel interference
- atmospheric interference
- background interference
- beat interference
- blocking interference
- broadband interference
- broadcast interference
- burst interference
- co-channel interference
- common-mode interference
- concentrated interference
- conducted interference
- contact interference
- contact network interference
- corona-generated interference
- criss-cross interference
- cross-color interference
- diathermy interference
- difference interference
- differential-mode interference
- digital interference
- discontinuous interference
- electrical interference
- electromagnetic interference
- equipment interference
- extraneous interference
- fluctuating interference
- harmful interference
- harmonic interference
- hazardous interference
- heterodyne interference
- HF-interference
- hydroacoustic interference
- ignition interference
- image interference
- in-band interference
- inductive interference
- interburst interference
- interchannel interference
- interpath interference
- interstation interference
- intersymbol interference
- intersystem interference
- irregular interference
- magnetic interference
- man-made interference
- mobile radio-to-TV receiver interference
- modal interference
- multiple-beam interference
- multiplicative interference
- natural interference
- noise interference
- normal-mode interference
- optical interference
- oscillator-harmonic interference
- out-of-band interference
- over-reach interference
- permissible interference
- physiological interference
- power line interference
- pulse interference
- radar interference
- radiated interference
- radio interference
- radiostation interference
- selective interference
- series-mode interference
- single-frequency interference
- single-tone interference
- sinusoidal interference
- spatial interference
- spread-spectrum interference
- switching interference
- symbol-to-symbol interference
- synphased interference
- systematic interference
- taxicab radio-to-police radiosystem interference
- telegraph interference
- television interference
- tone interference
- two-beam interference
- unaccessible interference
- unit-to-unit interference
- wave interferenceEnglish-Russian dictionary of telecommunications and their abbreviations > interference
-
49 level
1) уровень2) тлв. совокупность параметров изображения или их комбинаций3) степень4) порог5) регулировка•- acceptance-quality level
- acoustic noise level
- adaptation level
- addressing level
- alpha-geometric level
- alphamosaic level
- ambient level
- ambient-noise level
- amplitude levels
- audio-signal output level
- automatic white level
- average picture level
- band-power level
- band-pressure level
- base level
- black level
- blanking level
- call-tone level
- carrier-noise level
- channel level
- channel switching level
- channel-noise level
- chromatic level
- circuit-noise level
- coding level
- controlled level
- C-scale sound level
- current sensitivity level
- damage level
- data link level
- datum level
- defined level
- detail level
- digitization level
- effective recombination level
- electromagnetic interference level
- energy saving level
- foreground level
- frequency-modulated noise level on carrier
- hearing level
- HF-signal level
- hierarchical levels
- high level
- higher-order hierarchical level
- illuminance level
- input signal level
- integration level
- interference level
- internal sound level
- interrupt level
- link level
- load compensating level
- load compensation level
- logical 0 low level
- logical 1 high level
- loudness level
- lower order hierarchical level
- main level
- maximum acceptable signal level
- maximum record level
- maximum signal level
- measuring transmission level
- metallic level
- minimum-signal level
- noise level
- noise-emission level
- noise-generation level
- nondistorted peak level
- operating level
- optical recording level
- output signal level
- overload level
- peak level
- pedestal level
- pressure spectrum level
- printthrough level
- priority level
- privilege level
- protective level
- quantization level
- rated transmission level
- receiver overload level
- reference-black level
- reference-white level
- regenerator section level
- relative-signal level
- relative-transmission level
- representation level
- restriction level level
- rumble level
- side-lobe level
- sidetone level
- signal level
- sound intensity level
- sound level
- sound pressure level
- source sound level
- spectral voice level
- spectrum level
- speech interference level
- speech level
- SSB-equipment reference level
- susceptibility level
- sync level
- synchronous level
- telephone-network computerization level
- television level
- testing level
- through level
- transmission level
- transmission-path level
- trigger level
- virtual channel level
- virtual path level
- zero level
- zero-transmission levelEnglish-Russian dictionary of telecommunications and their abbreviations > level
-
50 sensor
1) датчик2) детектор•- acoustical emission sensor
- amperometric sensor
- angular movement sensor
- area image sensor
- array sensor
- automatic music sensor
- azimuth sensor
- binary sensor
- buoy sensor
- capacitance sensor
- CCD-sensor
- charge-coupled area-image sensor
- check text sensor
- CMD-sensor
- CMOS-sensor
- contact sensor
- contactless sensor
- current sensor
- data measuring sensor
- data sensor
- data-receiver sensor
- dew sensor
- digital sensor
- dimension sensor
- direct sensor
- displacement sensor
- door sensor
- dual-color sensor
- electric sensor
- electrode sensor
- electrolytic sensor
- electromagnetic sensor
- electronic sensor
- environmental sensor
- environmentals sensor
- execution sensor
- executive sensor
- feedback sensor
- feeler sensor
- fiber-optic current sensor
- fluidic sensor
- fluidic-flow sensor
- force-moment sensor
- frame transfer sensor
- gas sensor
- generator sensor
- grip sensor
- Hall sensor
- image sensor
- induction sensor
- inductive sensor
- infrared sensor
- interference sensor
- interleave transfer sensor
- IR-sensor
- laser reference voltage sensor
- laser sensor
- leak sensor
- level sensor
- liquid-filled sensor
- luminance sensor
- magnetic field sensor
- magnetic sensor
- magnetodiode sensor
- magnetoelectric sensor
- magnetoresistance sensor
- matrix sensor
- microwave sensor
- mobile sensor
- mutifrequency sensor
- needly sensor
- night-vision sensor
- off-line sensor
- optical sensor
- optical-fiber current sensor
- optical-proximity sensor
- optoelectronic sensor
- overload sensor
- parametric sensor
- photo sensor
- photoelectric sensor
- piezoelectric sensor
- platinum resistance sensor
- polypropylene sensor
- polysulfone sensor
- position sensor
- potentiometric sensor
- pressure sensor
- probe sensor
- proximity sensor
- pulse sensor
- quantum sensor
- quartz sensor
- radiotechnical sensor
- radiotelemetric sensor
- range-imaging sensor
- reel sensor
- register sensor
- remote control sensor
- remote sensor
- resistance sensor
- rheostate sensor
- self-scanned image sensor
- semiconductor Hall-effect sensor
- shock sensor
- signaling sensor
- silicon image sensor
- slip sensor
- smoke sensor
- solar sensor
- solid-state sensor
- strain sensor
- stress sensor
- stubbed sensor
- superconductive sensor
- supply sensor
- tact pulse sensor
- tactile sensor
- take-up sensor
- tape-program sensor
- temperature sensor
- thermal sensor
- touch sensor
- two-position sensor
- ultrasonic sensor
- vibration sensor
- voltage sensor
- window sensor
- wire sensorEnglish-Russian dictionary of telecommunications and their abbreviations > sensor
-
51 susceptibility
чувствительность; восприимчивость- diamagnetic susceptibility
- electromagnetic susceptibility
- inductance susceptibility
- paramagnetic susceptibility
- receiver susceptibilityEnglish-Russian dictionary of telecommunications and their abbreviations > susceptibility
-
52 probe
космическая ракета; исследовательская ракета; зондирующая ракета; штырь; щуп, зонд; пробоотборник; датчик; насадок; образец; топливоприемник ( заправляемого самолёта) ; проба, замер; исследование; зондировать, исследоватьdifferential pressure gust probe — насадок для измерений перепада давлений в порыве (при турбулентной атмосфере)
-
53 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
-
54 Hertz, Heinrich Rudolph
[br]b. 22 February 1857 Hamburg, Germanyd. 1 January 1894 Bonn, Germany[br]German physicist who was reputedly the first person to transmit and receive radio waves.[br]At the age of 17 Hertz entered the Gelehrtenschule of the Johaneums in Hamburg, but he left the following year to obtain practical experience for a year with a firm of engineers in Frankfurt am Main. He then spent six months at the Dresden Technical High School, followed by year of military service in Berlin. At this point he decided to switch from engineering to physics, and after a year in Munich he studied physics under Helmholtz at the University of Berlin, gaining his PhD with high honours in 1880. From 1883 to 1885 he was a privat-dozent at Kiel, during which time he studied the electromagnetic theory of James Clerk Maxwell. In 1885 he succeeded to the Chair in Physics at Karlsruhe Technical High School. There, in 1887, he constructed a rudimentary transmitter consisting of two 30 cm (12 in.) rods with metal balls separated by a 7.5 mm (0.3 in.) gap at the inner ends and metallic plates at the outer ends, the whole assembly being mounted at the focus of a large parabolic metal mirror and the two rods being connected to an induction coil. At the other side of his laboratory he placed a 70 cm (27½ in.) diameter wire loop with a similar air gap at the focus of a second metal mirror. When the induction coil was made to create a spark across the transmitter air gap, he found that a spark also occurred at the "receiver". By a series of experiments he was not only able to show that the invisible waves travelled in straight lines and were reflected by the parabolic mirrors, but also that the vibrations could be refracted like visible light and had a similar wavelength. By this first transmission and reception of radio waves he thus confirmed the theoretical predictions made by Maxwell some twenty years earlier. It was probably in his experiments with this apparatus in 1887 that Hertz also observed that the voltage at which a spark was able to jump a gap was significantly reduced by the presence of ultraviolet light. This so-called photoelectric effect was subsequently placed on a theoretical basis by Albert Einstein in 1905. In 1889 he became Professor of Physics at the University of Bonn, where he continued to investigate the nature of electric discharges in gases at low pressure until his death after a long and painful illness. In recognition of his measurement of radio and other waves, the international unit of frequency of an oscillatory wave, the cycle per second, is now universally known as the Hertz.[br]Principal Honours and DistinctionsRoyal Society Rumford Medal 1890.BibliographyMuch of Hertz's work, including his 1890 paper "On the fundamental equations of electrodynamics for bodies at rest", is recorded in three collections of his papers which are available in English translations by D.E.Jones et al., namely Electric Waves (1893), Miscellaneous Papers (1896) and Principles of Mechanics (1899).Further ReadingJ.G.O'Hara and W.Pricha, 1987, Hertz and the Maxwellians, London: Peter Peregrinus. J.Hertz, 1977, Heinrich Hertz, Memoirs, Letters and Diaries, San Francisco: San Francisco Press.R.Appleyard, 1930, Pioneers of Electrical Communication.See also: Heaviside, OliverKFBiographical history of technology > Hertz, Heinrich Rudolph
См. также в других словарях:
Electromagnetic near-field scanner — could be defined as a measurement system to determine a spatial distribution of an electrical quantity provided by a single or multiple field probes acquired in the near field region of a device under test possibly accompanied by the associated… … Wikipedia
Electromagnetic interference at 2.4ghz — can affect various devices.This article details the different users of the 2.4ghz band, how they cause interference to other users and how they are prone to interference from other users.PhoneMany cordless telephones in the US and Canada use the… … Wikipedia
Electromagnetic compatibility — (EMC) is the branch of electrical sciences which studies the unintentional generation, propagation and reception of electromagnetic energy with reference to the unwanted effects (Electromagnetic Interference, or EMI) that such energy may induce.… … Wikipedia
receiver — [ri sē′vər] n. 1. a person who receives; specif., a) one who officially receives money for others; collector or treasurer b) one who knowingly receives stolen goods for gain or concealment; fence c) Law one appointed by a court to administer or… … English World dictionary
electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… … Universalium
Electromagnetic interference — RIV redirects here. For other uses, see RIV (disambiguation). Electromagnetic interference in analog TV signal Electromagnetic interference (or EMI, also called radio frequency interference or RFI) is disturbance that affects an electrical… … Wikipedia
Receiver (radio) — This article is about a radio receiver, for other uses see Radio (disambiguation). A radio receiver is an electronic circuit that receives its input from an antenna, uses electronic filters to separate a wanted radio signal from all other signals … Wikipedia
Electromagnetic radiation — Electromagnetism Electricity · … Wikipedia
receiver — noun Date: 14th century one that receives: as a. treasurer b. (1) a person appointed to hold in trust and administer property under litigation (2) a person appointed to settle the affairs of a business involving a public interest or to manage a… … New Collegiate Dictionary
Dielectric wireless receiver — is a type of radiofrequency receiver front end featuring a complete absence of electronic circuitry and metal interconnects. It offers immunity against damage from intense electromagnetic radiation, produced by EMP and HPM sources. This receiver… … Wikipedia
Near-field electromagnetic ranging — (NFER) refers to any radio technology employing the near field properties of radio waves as a Real Time Location System (RTLS). Contents 1 Overview 2 Technical Discussion 2.1 Advantages … Wikipedia