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1 grid
ɡrid1) (a set of vertical and horizontal lines drawn on a map.) rutenett2) (a framework of iron bars.) gitter, (fe)ristgittersubst. \/ɡrɪd\/1) rist, grillrist2) nett, ledningsnett, lysnett, linjenett3) ( elektronikk) gitter4) gradnett, rutenett, rutesystem på kart5) ( bil) bagasjeholder6) ( bygg) stålskjelett7) ( slang) forklaring: kallenavn på sykkel• old grid8) (amer., sport) fotballbane i amerikansk fotball9) ( sjøfart) kjølhalingsslippstarting grid ( motorsport) startplass -
2 grid tower
The English-Russian dictionary general scientific > grid tower
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3 grid-packed tower
The English-Russian dictionary general scientific > grid-packed tower
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4 grate
I nounRost, der; (fireplace) Kamin, derII 1. transitive verb2) (grind)grate one's teeth in anger — vor Wut mit den Zähnen knirschen
3) (utter in harsh tone) [durch die Zähne] knirschen2. intransitive verb1) (rub, sound harshly) knirschen2)grate [up]on somebody/somebody's nerves — jemandem auf die Nerven gehen
* * *I [ɡreit] noun(a framework of iron bars for holding a fire in a fireplace.) das GitterII [ɡreit] verb1) (to rub (cheese, vegetables etc) into small pieces by means of a grater.) reiben2) (to irritate: His voice grates on me.) schmerzen•- academic.ru/32181/grater">grater- grating* * *grate1[greɪt]ngrate2[greɪt]I. vi1. (annoy) noise in den Ohren weh tunto \grate on sb['s nerves] jdm auf die Nerven gehen [o fallen]it's the way he's always talking about himself — it just \grates on me! die Art, wie er immer nur über sich spricht — ich kann es nicht mehr hören!2. (rasp) kratzenthe noise of the chair grating on the stone floor das Geräusch, wenn der Stuhl über den Steinboden schrammtthe hinges of the old wooden door \grated die alte Holztür quietschte in den Angeln▪ to \grate against one another gegeneinanderreibenII. vt1. (grind)to \grate one's teeth mit den Zähnen knirschen2. (shred)to finely/coarsely \grate sth etw fein/grob reiben* * *I [greɪt]n(= grid) Gitter nt; (in fire) (Feuer)rost m; (= fireplace) Kamin m II1. vt2) (bottom of car, boat etc = scrape) streifen; (person = make a grating noise with) kratzen mit; one's teeth knirschen mit2. vi(= scrape) streifen ( against +acc); (= make a noise) kratzen; (rusty door) quietschen; (feet on gravel) knirschen; (fig) wehtun (on sb jdm), krank machen (on sb jdn)to grate on sb's nerves —
* * *grate1 [ɡreıt]A v/t1. Käse etc reiben, Gemüse etc auch raspeln2. a) knirschen mit:grate one’s teethb) kratzen mitc) quietschen mit3. etwas krächzen(d sagen)B v/i1. a) knirschenb) kratzenc) quietschen2. fig wehtun ([up]on sb jemandem):grate on sb’s ears jemandem in den Ohren wehtun;grate on sb’s nerves an jemandes Nerven zerrengrate2 [ɡreıt]A s1. Gitter n3. Kamin mB v/t1. vergittern2. mit einem Rost versehen* * *I nounRost, der; (fireplace) Kamin, derII 1. transitive verb1) (reduce to particles) reiben; (less finely) raspeln2) (grind)3) (utter in harsh tone) [durch die Zähne] knirschen2. intransitive verb1) (rub, sound harshly) knirschen2)grate [up]on somebody/somebody's nerves — jemandem auf die Nerven gehen
* * *n.Feuerrost m.Gitter - n.Rost -e m. v.kratzen v.krächzen v.krächzend sagen ausdr.nirschen v.quietschen v.raspeln v.rastern v.vergittern v. -
5 FROG
1) Медицина: Fresh Reservoir Oxy Generator2) Военный термин: free rocket over ground3) Техника: Flow Reduced Orifice Gauge4) Шутливое выражение: Fast Road Of Glass, Four Really Old Guys, Front and Rear On Ground5) Химия: Fresh Reservoir Oxygen Generator6) Религия: Faith Relies On God, Faithfully Relying On God, Firmly Rely On God, For Righteousness Of God, Forever Rely On God, Forever Relying On God, Fully Reliant On God, Fully Rely On God, Fully Relying On God7) Сокращение: Free-Rocket-Over-Ground8) Университет: Find Reflect Organize And Generate9) Физиология: Female10) Электроника: Frequency Regulation Of Generator, Frequency Resolved Optical Gating11) Транспорт: Flies Right Off The Ground12) Глоссарий компании Сахалин Энерджи: transport carrier13) Образование: Facilitated Reading For Optimum Growth, Facilitating Reading For Optimum Growth, Fluent Reading Our Goal, Fully Responsible Organized And Growing14) Автоматика: free ranging on grid15) НАСДАК: LeapFrog Smart16) Чат: Furnaced Room Over Garage -
6 frog
1) Медицина: Fresh Reservoir Oxy Generator2) Военный термин: free rocket over ground3) Техника: Flow Reduced Orifice Gauge4) Шутливое выражение: Fast Road Of Glass, Four Really Old Guys, Front and Rear On Ground5) Химия: Fresh Reservoir Oxygen Generator6) Религия: Faith Relies On God, Faithfully Relying On God, Firmly Rely On God, For Righteousness Of God, Forever Rely On God, Forever Relying On God, Fully Reliant On God, Fully Rely On God, Fully Relying On God7) Сокращение: Free-Rocket-Over-Ground8) Университет: Find Reflect Organize And Generate9) Физиология: Female10) Электроника: Frequency Regulation Of Generator, Frequency Resolved Optical Gating11) Транспорт: Flies Right Off The Ground12) Глоссарий компании Сахалин Энерджи: transport carrier13) Образование: Facilitated Reading For Optimum Growth, Facilitating Reading For Optimum Growth, Fluent Reading Our Goal, Fully Responsible Organized And Growing14) Автоматика: free ranging on grid15) НАСДАК: LeapFrog Smart16) Чат: Furnaced Room Over Garage -
7 system
n1) система2) способ; метод3) сеть4) строй•to deploy a system — размещать / разворачивать систему (напр. обороны)
to formulate a system — разрабатывать / вырабатывать систему
to overhaul / to reform a country's political system — перестраивать политическую систему страны
- abolition of the systemto set up a system — создавать / учреждать систему
- accounting system
- administrative system
- advanced system
- advantages of the system
- air-based system
- aircraft telecommunications system
- antagonistic systems
- anti-ballistic missile system
- anti-missile defense system
- anti-missile space defense system
- anti-satellite systems
- ASAT systems
- authoritative system
- automated management systems
- automated system
- automatic control system
- automatic data processing system
- banking system
- bipartisan system
- biparty system
- bonus system
- break-up of the system
- British entry into the European Monetary System
- bureaucrat system
- capitalist economic system
- capitalist system
- career development system
- centrally planned system
- clan system
- classified national defense system
- collapse of the system
- collective security system
- communal system
- communications system
- competitive price system
- complex system
- comprehensive system
- compulsory purchase system
- computer system
- constitutional system
- contract system
- control system
- conventional system
- country programming system
- credit and banking system
- credit system
- crisis of the system
- cultural system
- currently-operating system
- decentralized system
- defense system
- deficiency of the system
- delivery system
- democratic political systems
- deterrent system
- different social systems
- disintegration of the system
- distribution system
- dynamic international system
- early warning system
- ecological system
- economic system
- educational system
- effective system
- efficient system
- election system
- electoral system
- electronic system
- EMS
- European Monetary System
- exploitation system
- exploiting system
- fair system
- family-planning system
- federal grant system
- finance and credit system
- financial system
- first-past-the-post voting system
- forecasting system
- formation of the system
- free enterprise system
- free market system
- generalized system of preferences
- global system
- grid system
- ground-based system
- health care system
- health system
- historically established system
- home security system
- immunity system
- industrial system
- inequitable system
- information system
- INIS
- institutional system
- integrated system
- intelligence system
- International Nuclear Information System
- international system
- International Trusteeship System
- irrigation system
- job-by-job system of payment
- judicial system
- land tenure system
- land-based antiballistic missile system
- legal system
- liberalization of the political system
- life-support system
- majority system
- management system
- managerial system
- mandate system
- mandatory system
- market system
- mayor-council system
- merit system
- metric system
- missile and satellite detection system
- missile delivery system
- misuse of the judicial system for political purposes
- monarchical system
- monetary and credit system
- monetary system
- monitoring system
- monopolistic system
- motor-road and railway system
- multifaceted system
- multilateral payments system
- multiparty system
- mutually-acceptable system
- national accounting and control system
- national defense system
- new arms systems
- noncapitalist system
- obsolete social system
- old system
- one-man-one-vote system
- one-member-one-vote system
- one-party system
- opposing social systems
- optimum system
- outmoded system
- overhaul of the tax system
- parliamentary system
- party system
- payments system
- pension system
- people's democratic system
- philosophical system
- planning system
- political system
- post adjustment system
- power system
- preferential system
- premium system
- presidential system
- price system
- private enterprise system
- program budgeting system
- proportional representation system
- public pension system
- records system
- regimented political system
- remnants of the system
- reports system
- republican system
- ruling system
- safeguards system
- satellite-tracking system
- sea-based system
- security system
- social security system
- social system
- socio-economic system
- socio-political system
- space defense system
- space weapons systems
- space-based system
- spoils system
- stability system
- stable system
- state political system
- state system
- state-managed social security system
- strategic nuclear-weapon systems
- submarine-based system
- supply system
- system of collective security
- system of exploitation
- system of geographical distribution
- system of government and public organizations - taxation system
- technologically advanced weapons systems
- territorial system
- training system
- transition to a multiparty system
- tribal system
- trusteeship system
- two-party system
- united economic system
- visa system
- voting system
- wage system
- world system
- world trading system -
8 quarter
'kwo:tə 1. noun1) (one of four equal parts of something which together form the whole (amount) of the thing: There are four of us, so we'll cut the cake into quarters; It's (a) quarter past / (American) after four; In the first quarter of the year his firm made a profit; The shop is about a quarter of a mile away; an hour and a quarter; two and a quarter hours.) fjerde-/firedel, kvart, kvarter2) (in the United States and Canada, (a coin worth) twenty-five cents, the fourth part of a dollar.) kvartdollar, 25 cent3) (a district or part of a town especially where a particular group of people live: He lives in the Polish quarter of the town.) bydel, kvarter, strøk4) (a direction: People were coming at me from all quarters.) retning, kant, hold, hjørne5) (mercy shown to an enemy.) nåde, grid6) (the leg of a usually large animal, or a joint of meat which includes a leg: a quarter of beef; a bull's hindquarters.) kvart (bakpart av) gris/okse, osv.7) (the shape of the moon at the end of the first and third weeks of its cycle; the first or fourth week of the cycle itself.) måne i ny eller ne8) (one of four equal periods of play in some games.) omgang9) (a period of study at a college etc usually 10 to 12 weeks in length.) termin2. verb1) (to cut into four equal parts: We'll quarter the cake and then we'll all have an equal share.) dele i fire2) (to divide by four: If we each do the work at the same time, we could quarter the time it would take to finish the job.) dele på/med fire3) (to give (especially a soldier) somewhere to stay: The soldiers were quartered all over the town.) innkvartere•3. adverb(once every three months: We pay our electricity bill quarterly.) hvert kvartal4. noun(a magazine etc which is published once every three months.) kvartalstidsskrift- quarters- quarter-deck
- quarter-final
- quarter-finalist
- quartermaster
- at close quartersfjerdedel--------kvarter--------strøkIsubst. \/ˈkwɔːtə\/1) fjerdedel, en kvart2) ( tid) kvarter, kvartal, termin3) ( sted) kvarter, kvartal, bydel4) forklaring: rommål for tørrvarer som tilsvarer 8 bushels forklaring: (290,9 l)5) forklaring: britisk vektmål som tilsvarer 1\/4 hundredweight forklaring: eller 28 poundsforklaring: (britisk) eller 25 pounds forklaring: (amer.)6) (amer.) 25 cent7) ( av slaktet dyr) fjerding8) ( astronomi) kvarter, månefase9) ( også overført) side, kant, hold10) verdenshjørne, kompassretning12) ( spesielt militærvesen) nåde14) (amer., fotball, basketball) omgangat close quarters på nært holdby the quarter kvartalsvisin all quarters eller in every quarter på alle hold, overaltnot a quarter as ikke på langt næra quarter of en kvart, en fjerdedelsa quarter past\/to eller (a) quarter after\/of kvart over\/påtake up one's quarters with slå seg ned hostake up one's quarters\/abode\/lodgings slå seg ned\/til, innkvartere seg, flytte inn ( sjøfart) stille seg på postIIverb \/ˈkwɔːtə\/1) dele i fire deler2) ( militærvesen) innkvartere, forlegge3) være innkvartert, bli innkvartert4) ta inn, innkvartere seg5) ( historisk) partere6) ( heraldikk) kvadrere, firedele7) ( heraldikk) anbringe\/bære i kvadrert skjold8) ( om jakthund) gjennomsøke9) ( sjøfart) seile for låringsvind, seile med vinden på låringen, sløre10) virre hit og ditgive no quarter ikke vise nådequarter somebody on dytte noen over på -
9 grate
to \grate on sb['s nerves] jdm auf die Nerven gehen [o fallen];it's the way he's always talking about himself - it just \grates on me! die Art, wie er immer nur über sich spricht - ich kann es nicht mehr hören!2) ( rasp) kratzen;the noise of the chair grating on the stone floor das Geräusch, wenn der Stuhl über den Steinboden schrammt;the hinges of the old wooden door \grated die alte Holztür quietschte in den Angeln;to \grate against one another gegeneinanderreiben vt1) ( grind)to \grate one's teeth mit den Zähnen knirschen2) ( shred)to finely/coarsely \grate sth etw fein/grob reiben -
10 Lisbon Earthquake
On 1 November 1755, All Saints' Day,Lisbon experienced the worst earthquake known during its recorded history. The earthquake destroyed large sections of the city. The greatest destruction occurred in the central downtown ( baixa) and the great Royal Palace square, now in a different form known as "Commerce Square," but still referred to by the old name, "Square of the Palace" (Terreiro do Paço). Thousands of buildings, including more than 100 churches and 300 palaces, collapsed, and tens of thousands of people died. The shocks from the earthquake were followed by a giant tidal wave from down the Tagus River, which drowned many, and then by devastating fires that were started by candles' lit during the All Saint's Day religious observances.The Marquis de Pombal, the king's prime minister, was decisive in his rehabilitation and reconstruction efforts. Much of the Lisbon downtown, the baixa, was rebuilt according to a master plan that laid out a grid pattern of streets upon which were erected buildings of a uniform height and design. The Lisbon earthquake became a great issue and discussion point in mid-l8th century Europe and Great Britain, and the British Parliament voted 100,000 pounds in humanitarian aid and relief to Portugal and the earthquake victims, one of the first cases of massive humanitarian aid for an international disaster from a foreign nation, albeit Portugal's oldest ally. -
11 floor
floor [flɔ:(r)]1 noun∎ earthen floor sol m en terre battue;∎ to put sth/to sit on the floor poser qch/s'asseoir par terre;∎ the forest floor le sol de la forêt, la couverture;∎ figurative to wipe the floor with sb (in match, fight) battre qn à plate couture, réduire qn en miettes; (in argument) descendre qn∎ we live ten floors up nous habitons au dixième étage;∎ their offices are two floors down leurs bureaux sont deux étages plus bas;∎ on the same floor au même étage;∎ on the floor below à l'étage en-dessous;(d) (for dancing) piste f (de danse);∎ to take the floor aller sur la piste (de danse);∎ shall we take the floor? voulez-vous m'accorder cette danse?(e) (in parliament, assembly etc) enceinte f;∎ to have/to take the floor (speaker) avoir/prendre la parole;∎ Mr Taylor has the floor la parole est à M. Taylor;∎ he had the floor for twenty minutes il a parlé ou a gardé la parole pendant vingt minutes;∎ to give sb the floor accorder ou donner la parole à qn;∎ questions from the floor questions fpl du public;∎ to cross the floor (in parliament) changer de parti(f) (of stock exchange) parquet m;∎ trading on the floor was quiet today la journée n'a pas été très animée à la Bourse(a) (building, house) faire le sol de; (with linoleum) poser le revêtement de sol dans; (with parquet) poser le parquet ou plancher dans, parqueter; (with tiles) poser le carrelage dans, carreler∎ that virus really floored me ce virus m'a complètement terrassé∎ to floor it (drive fast) mettre le pied au plancher►► Marketing floor ad, floor advertisement publicité f au sol;floor area (of room, office) surface f;Television floor assistant assistant(e) m,f de plateau;floor cleaner (produit m) nettoyant m pour sols;floor cloth serpillière f; (old rag) chiffon m;Television floor crew personnel m de plateau;floor exercise (in gymnastics) exercice m au sol;Building industry floor grid couchis m;American floor lamp lampadaire m;Politics floor leader = chef de file d'un parti siégeant au Sénat ou à la Chambre des représentants aux États-Unis;floor model modèle m d'exposition;floor plan plan m;floor polish encaustique f, cire f;floor polisher (machine) cireuse f;Commerce floor price prix m seuil;American floor sample modèle m d'exposition;floor show spectacle m de cabaret;floor tile carreau m;Stock Exchange floor trader commis m;Stock Exchange floor trading cotation f à la corbeille;floor wax cire f, encaustique f;floor work exercices mpl au sol -
12 national
national ['næʃənəl]national;∎ the national newspapers la presse nationale;∎ he became a national hero il est devenu un héros national;∎ the country's national sport le sport national du pays;∎ a source of national pride une source de fierté nationale;∎ the killings caused a national outcry les assassinats ont scandalisé le pays;∎ on a national scale à l'échelle nationale;∎ they won 38 percent of the national vote ils ont remporté 38 pour cent des voix sur l'ensemble du pays;∎ it's not in the national interest ce n'est pas dans l'intérêt du pays2 noun∎ all EU nationals tous les ressortissants des pays de l'Union européenne;∎ Irish nationals ressortissants mpl de la République d'Irlande(b) (newspaper) journal m national►► national accounting comptabilité f nationale;national anthem hymne m national;French Canadian national assembly (in Quebec) Assemblée f nationale;British old-fashioned national assistance assistance f publique;American National Association of Colleges and Universities = association des établissements d'enseignement supérieur américains;British the National Audit Office ≃ la Cour des comptes;national bank = banque agréée par le gouvernement américain et qui doit faire partie du système bancaire fédéral;the National Cancer Institute = organisme américain de recherche sur le cancer;the National Childbirth Trust = organisme d'information et d'éducation des jeunes parents en Grande-Bretagne;Australian national code football m australien;American the National Collegiate Athletic Association = association interuniversitaire traitant des questions sportives;American Politics National Convention = grande réunion du parti démocrate ou républicain pour choisir le "ticket" (candidats à la présidence et à la vice-présidence);national costume costume m national;the National Council for Civil Liberties = en Grande-Bretagne, ligue de défense des droits du citoyen luttant contre toute forme de discrimination;the National Council for Vocational Qualifications = organisme britannique responsable de la formation professionnelle;the National Curriculum = programme introduit en 1988 définissant au niveau national (Angleterre et pays de Galles) le contenu de l'enseignement primaire et secondaire;Finance national debt dette f publique, dette f de l'État;national dress costume m national;the National Endowment for the Arts = organisme américain accordant des bourses à des artistes, des musées ou des compagnies théâtrales;the National Endowment for the Humanities = organisme américain accordant des bourses à des écrivains ou à des chercheurs;the National Endowment for Science, Technology and the Arts = organisme indépendant d'aide financière, à partir de fonds provenant de la Loterie nationale, aux artistes, inventeurs et scientifiques;Press National Enquirer = hebdomadaire américain à sensation;British the National Enterprise Board ≃ Agence f nationale pour le développement industriel;British Politics the National Executive Committee = comité chargé de définir la ligne d'action du parti travailliste;the National Exhibition Centre = centre de conférences et d'expositions à Birmingham (Angleterre);National Express ® = société d'autocars reliant les principales villes de Grande-Bretagne;British National Extension College centre m d'enseignement à distance;the National Farmers' Union = syndicat britannique d'exploitants agricoles;the National Film Theatre = cinémathèque à Londres;the National Foundation of the Arts and Humanities = organisme public américain d'aide à l'action culturelle;the National Front = parti d'extrême droite britannique, ≃ le Front national;the National Gallery la National Gallery (principal musée de peinture du Royaume-Uni, situé à Londres);national government gouvernement m de coalition;Finance National Giro = service britannique de chèques postaux;the National Graphical Association = syndicat britannique d'imprimeurs;national grid British Electricity réseau m national d'électricité; Geography réseau m;the National Guard (in the US) la Garde nationale (armée nationale américaine composée de volontaires);National Guardsman membre m de la Garde nationale;the National Health (Service) = système créé en 1946 en Grande-Bretagne et financé par l'État, assurant la gratuité des soins et des services médicaux, ≃ la Sécurité sociale;∎ to get treatment on the National Health (Service) se faire soigner sous le régime de la Sécurité sociale;British National Health Service glasses = modèle de lunettes remboursé par la Sécurité sociale;National Heritage = organisme ayant pour mission la conservation du patrimoine;national hunt (racing) courses fpl d'obstacles;national income revenu m national;British national insurance = système britannique de sécurité sociale (maladie, retraite) et d'assurance chômage;national insurance contributions cotisations fpl à la Sécurité sociale;national insurance number numéro m de Sécurité sociale;American the National Labor Relations Board = organisme américain de conciliation et d'arbitrage des conflits du travail, ≃ conseil m de prud'hommes;Press National Lampoon = revue satirique américaine;National League = l'une des deux ligues professionnelles de base-ball aux États-Unis;the National Lottery = loterie nationale britannique;the National Liberation Front le Front de libération nationale;the National Maritime Museum = musée de la mer situé à Greenwich;National Missile Defence System projet m NMD (programme de défense antimissiles américain);National Organization for Women = organisation de lutte pour les droits de la femme;national park parc m national;the National Portrait Gallery = musée londonien entièrement consacré aux portraits;National Power = entreprise privée de production d'électricité en Angleterre et au pays de Galles;Finance national product produit m national;National Public Radio = réseau américain de stations de radio libres;national readership survey étude f nationale sur le lectorat;the National Rifle Association = association américaine défendant le droit au port d'armes;British National Savings Bank ≃ Caisse f nationale d'épargne;National Savings certificate bon m de caisse d'épargne;Irish national school école f primaire;American the National Science Foundation = organisme d'aide à la recherche scientifique;national security sécurité f nationale;American Politics National Security Adviser = conseiller du président américain sur les questions de sécurité nationale;Politics the National Security Council le Conseil de sécurité nationale;British national service service m militaire;British national serviceman appelé m, militaire m du contingent;national socialism national-socialisme m;1 nounnational-socialiste mfnational-socialiste;the National Society for the Prevention of Cruelty to Children = association britannique de protection de l'enfance;Irish national teacher instituteur(trice) m,f;the National Theatre (in London) = important centre dramatique à Londres, siège de la Royal National Theatre Company;American the National Transportation Safety Board = agence du gouvernement américain chargée des questions de sécurité dans le domaine des transports;British the National Trust = organisme non gouvernemental britannique assurant la conservation de certains paysages et monuments historiques;National Trust property ≃ site m protégé;the National Trust for Scotland = organisme non gouvernemental assurant la conservation de certains paysages et monuments historiques écossais;National Vocational Qualification = diplôme britannique professionnel national;the National Weather Service = les services météorologiques américainsⓘ NATIONAL HEALTH SERVICE Le "National Health Service" ou "NHS" fut créé par le gouvernement travailliste en 1946, donnant accès à chacun aux soins médicaux gratuits. Cependant, au cours des années 80, le gouvernement de Margaret Thatcher voulut encourager le public à souscrire des assurances médicales privées, et le "NHS" subit des coupes budgétaires importantes. Au cours de ces dernières années, la polémique autour du "National Health Service" s'est intensifiée. Le "NHS" connaît en effet de nombreuses difficultés. -
13 De Forest, Lee
SUBJECT AREA: Broadcasting, Electronics and information technology, Photography, film and optics, Recording, Telecommunications[br]b. 26 August 1873 Council Bluffs, Iowa, USAd. 30 June 1961 Hollywood, California, USA[br]American electrical engineer and inventor principally known for his invention of the Audion, or triode, vacuum tube; also a pioneer of sound in the cinema.[br]De Forest was born into the family of a Congregational minister that moved to Alabama in 1879 when the father became President of a college for African-Americans; this was a position that led to the family's social ostracism by the white community. By the time he was 13 years old, De Forest was already a keen mechanical inventor, and in 1893, rejecting his father's plan for him to become a clergyman, he entered the Sheffield Scientific School of Yale University. Following his first degree, he went on to study the propagation of electromagnetic waves, gaining a PhD in physics in 1899 for his thesis on the "Reflection of Hertzian Waves from the Ends of Parallel Wires", probably the first US thesis in the field of radio.He then joined the Western Electric Company in Chicago where he helped develop the infant technology of wireless, working his way up from a modest post in the production area to a position in the experimental laboratory. There, working alone after normal working hours, he developed a detector of electromagnetic waves based on an electrolytic device similar to that already invented by Fleming in England. Recognizing his talents, a number of financial backers enabled him to set up his own business in 1902 under the name of De Forest Wireless Telegraphy Company; he was soon demonstrating wireless telegraphy to interested parties and entering into competition with the American Marconi Company.Despite the failure of this company because of fraud by his partners, he continued his experiments; in 1907, by adding a third electrode, a wire mesh, between the anode and cathode of the thermionic diode invented by Fleming in 1904, he was able to produce the amplifying device now known as the triode valve and achieve a sensitivity of radio-signal reception much greater than possible with the passive carborundum and electrolytic detectors hitherto available. Patented under the name Audion, this new vacuum device was soon successfully used for experimental broadcasts of music and speech in New York and Paris. The invention of the Audion has been described as the beginning of the electronic era. Although much development work was required before its full potential was realized, the Audion opened the way to progress in all areas of sound transmission, recording and reproduction. The patent was challenged by Fleming and it was not until 1943 that De Forest's claim was finally recognized.Overcoming the near failure of his new company, the De Forest Radio Telephone Company, as well as unsuccessful charges of fraudulent promotion of the Audion, he continued to exploit the potential of his invention. By 1912 he had used transformer-coupling of several Audion stages to achieve high gain at radio frequencies, making long-distance communication a practical proposition, and had applied positive feedback from the Audion output anode to its input grid to realize a stable transmitter oscillator and modulator. These successes led to prolonged patent litigation with Edwin Armstrong and others, and he eventually sold the manufacturing rights, in retrospect often for a pittance.During the early 1920s De Forest began a fruitful association with T.W.Case, who for around ten years had been working to perfect a moving-picture sound system. De Forest claimed to have had an interest in sound films as early as 1900, and Case now began to supply him with photoelectric cells and primitive sound cameras. He eventually devised a variable-density sound-on-film system utilizing a glow-discharge modulator, the Photion. By 1926 De Forest's Phonofilm had been successfully demonstrated in over fifty theatres and this system became the basis of Movietone. Though his ideas were on the right lines, the technology was insufficiently developed and it was left to others to produce a system acceptable to the film industry. However, De Forest had played a key role in transforming the nature of the film industry; within a space of five years the production of silent films had all but ceased.In the following decade De Forest applied the Audion to the development of medical diathermy. Finally, after spending most of his working life as an independent inventor and entrepreneur, he worked for a time during the Second World War at the Bell Telephone Laboratories on military applications of electronics.[br]Principal Honours and DistinctionsInstitute of Electronic and Radio Engineers Medal of Honour 1922. President, Institute of Electronic and Radio Engineers 1930. Institute of Electrical and Electronics Engineers Edison Medal 1946.Bibliography1904, "Electrolytic detectors", Electrician 54:94 (describes the electrolytic detector). 1907, US patent no. 841,387 (the Audion).1950, Father of Radio, Chicago: WIlcox \& Follett (autobiography).De Forest gave his own account of the development of his sound-on-film system in a series of articles: 1923. "The Phonofilm", Transactions of the Society of Motion Picture Engineers 16 (May): 61–75; 1924. "Phonofilm progress", Transactions of the Society of Motion Picture Engineers 20:17–19; 1927, "Recent developments in the Phonofilm", Transactions of the Society of Motion Picture Engineers 27:64–76; 1941, "Pioneering in talking pictures", Journal of the Society of Motion Picture Engineers 36 (January): 41–9.Further ReadingG.Carneal, 1930, A Conqueror of Space (biography).I.Levine, 1964, Electronics Pioneer, Lee De Forest (biography).E.I.Sponable, 1947, "Historical development of sound films", Journal of the Society of Motion Picture Engineers 48 (April): 275–303 (an authoritative account of De Forest's sound-film work, by Case's assistant).W.R.McLaurin, 1949, Invention and Innovation in the Radio Industry.C.F.Booth, 1955, "Fleming and De Forest. An appreciation", in Thermionic Valves 1904– 1954, IEE.V.J.Phillips, 1980, Early Radio Detectors, London: Peter Peregrinus.KF / JW
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