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1 convert information
Большой англо-русский и русско-английский словарь > convert information
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2 convert information
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3 convert information to digital form
English-Russian dictionary of telecommunications > convert information to digital form
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4 information
1) информация
2) известия
3) информационный
4) информирование
5) сведение
6) сведения
7) справочная
8) справочный
9) данные
10) известие
11) осведомление
12) сообщение
13) справка
– acquire information
– alphabetic information
– amount of information
– average information
– binary information
– body of information
– checking information
– coded information
– convert information
– decimal information
– digital information
– disseminate information
– dummy information
– enter information
– erase information
– extraneous information
– flight information
– information bit
– information block
– information board
– information channel
– information circuit
– information content
– information density
– information diagram
– information gain
– information handling
– information language
– information office
– information officer
– information pulse
– information read-out
– information retrieval
– information search
– information sequence
– information set
– information source
– information storage
– information theory
– information track
– input information
– integrate information
– interblock information
– intrablock information
– mutual information
– non-numerical information
– perfect information
– precise information
– precision of information
– present information
– process information
– produce information
– read information
– redundant information
– source information
– stability information
– store information
– subjective information
– summarized information
– target information
– taxon information
– transmit information
– unit of information
– update information
– video information
communicate flight information — сообщать информацию о рейсе
information display rate — скорость воспроизведения информации
information retrieval language — информационно-поисковый язык
information retrieval system — <comput.> система информационно-поисковая
natural unit of information — натуральная единица информации
reference information store — <comput.> фонд справочно-информационный
registrator of telememetry information — регистратор телеметрической информации
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5 information
информация, данные агентства- audio-visual information - background information - business information - confidential information - credit information - design information - exact information - favourable information - first-hand information - health information - know-how information - legal information - patent information - preliminary information - product information - programme support information - public information - recipient of information - reference information - requested information - significant information - specialised information - technical information - useful information - visual informationto retrieve information — осуществлять выборку информации (напр. из хранилища)
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6 convert
1) переводить
2) переоборудовать
3) преобразовать
4) обращать
5) преобразовывать
– convert airplane
– convert information
– convert to a magnet -
7 Convert Database
தரவுத்தளத்தை மாற்று -
8 Convert
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9 преобразовывать информация
Большой англо-русский и русско-английский словарь > преобразовывать информация
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10 exchange
1. n обмен, менаexchange of goods, commodity exchanges — товарообмен
exchange of civilities — обмен любезностями, светская беседа
2. n фин. размен3. n замена, смена4. n иностранная валюта; переводный вексель, траттаexchange permit — валютное разрешение; разрешение на перевод валюты
exchange restrictions — валютные ограничения; ограничения в переводе иностранной валюты
exchange transactions — валютные операции, операции в валюте
5. n курс6. n расчёты посредством девиз; расплата посредством переводов векселей7. n биржа8. n телефонная станция; коммутатор9. n гарнизонный магазин, магазин военно-торговой службы10. n обменная книга, обменный экземпляр11. n физиол. обращение, обмен12. n мат. физ. обмен местами; перестановка13. v менять, обмениватьto exchange farm products for manufactured goods — обменивать продукты сельского хозяйства на промышленные товары
to exchange shots — переругиваться, обмениваться колкостями
14. v обмениваться; менятьсяto exchange greetings — приветствовать друг друга, обменяться приветствиями
15. v променять16. v разменивать17. v обмениватьСинонимический ряд:1. barter (noun) barter; business; change; commerce; replacement; resale; shift; substitute2. dialogue (noun) dialogue; interchange; talk3. market (noun) market4. retort (noun) intercourse; repartee; reprisal; retaliation; retort5. trade (noun) commutation; substitution; switch; trade; transaction; transposition6. bandy (verb) bandy; give and take; reciprocate; requite; retaliate; retort; return; transact7. convert (verb) change; commute; convert; counterchange; interchange; substitute; transpose8. trade (verb) bargain; barter; swap; switch; trade; traffic; truckАнтонимический ряд: -
11 system
n1) система; комплекс2) система; порядок; классификация3) метод; способ
- accelerated cost recovery system
- accounting system
- actual cost system
- administrative system
- advanced system
- airline system
- appointment system
- assessment system
- automated control system
- automated management system
- automatic conveyor system
- automatic data processing system
- automatic transfer system
- banking system
- batch system
- bidding system
- bilateral clearing system
- bimetallic monetary system
- bonus system
- budgetary control system
- cash system
- centralized control system
- central record system
- chain store system
- checking system
- classification system
- clearing system
- clearing house interbank payment system
- closed system
- closed system of finance
- communication system
- computerised system
- computerised system of payments
- computerised interbank clearing system
- conference system
- constrained system
- constraint system
- container system
- contract system
- contractual vertical marketing system
- control system
- controlled system
- corporate vertical marketing system
- cost accounting system
- cost control system
- cost distribution system
- credit system
- crediting system
- credit scoring system
- credit transfer system
- cropping system
- currency system
- data system
- data acquisition system
- data collection system
- data interchange system
- data processing system
- data transmission system
- decentralized system
- decimal system
- deferred rebate system
- department incentive system
- deposit insurance system
- distribution system
- dual system
- dual-pay system
- dual price system
- dual standard cost system
- dynamic system
- economic system
- educational system
- electronic book-entry system
- electronic fund transfer system
- engineering system
- equilibrium system
- estimate cost system
- European monetary system
- evaluation system
- exchange system
- factory system
- farming system
- farm price system
- Federal Reserve System
- feedback system
- financial system
- fiscal system
- forecasting system
- free enterprise system
- generalized system of preferences
- giro system
- hauling system
- hire purchase system
- historical cost system
- household system
- import quota system
- imprest system
- industrial system
- inefficient tax system
- information system
- information retrieval system
- in-plant system
- inspection system
- integrated accounting system
- integrated record system
- Internet-based system
- inventory control system
- irrigation system
- job order cost system
- judicial system
- justice system
- land tenure system
- land-use system
- legal system
- licence system
- linear system
- lump system
- macroeconomic system
- management system
- management information system
- managerial system
- market system
- marketing system
- master system
- measuring system
- mechanical accounting system
- mercantile system
- metric system
- monetary system
- monitoring system
- multichannel system
- multicomputer system
- multidepot system
- multiitem system
- multilateral system of settlements
- multilevel system
- multiple system
- multiproduct inventory system
- multipurpose system
- multirobot system
- multistage system
- multiuser computer system
- national banking system
- normalized system
- office system
- one-crop system
- one-price system
- open price system
- operating system
- operational system
- order system
- ordering system
- par value system
- patent system
- pay system
- pay-as-you-earn system
- pay-as-you-go system
- payment system
- petty cash system
- piecework system
- planning system
- postal system
- post giro system
- power system
- premium system
- price system
- priority system
- private enterprise system
- process control system
- processing system
- production system
- product testing system
- programme system
- programme development system
- programming system
- protectionist system
- protective system
- public-address system
- quality system
- quality intelligence system
- quality rating system
- queueing system
- quota system
- railroad system
- railway system
- rating system
- rationing system
- real-time system
- recording system
- record keeping system
- reference system
- registration system
- relay system
- remote-control system
- reporting system
- retail trade system
- retrieval system
- risk-management system
- rotation system
- savings bank system
- scoring system
- search system
- selection system
- service system
- settlement system
- sewage system
- shared resource system
- shuttle system
- single system
- single-channel system
- social system
- stable system
- stand-alone system
- standard system
- standard cost system
- standby system
- state system
- static system
- stationary system
- storage system
- storekeeping system
- supply system
- sweating system
- tariff system
- tax system
- taxation system
- telecommunication system
- telephone system
- telephone answering system
- tender system
- tenure system
- testing system
- time-shared system
- timesharing system
- transfer system
- transmission system
- transport system
- transportation system
- trial system
- truck system
- two-shift system
- two-tier banking system
- two-tier gold system
- underwriting system
- uniform system of accounts
- universal time system
- unstable system
- value system
- vertical marketing system
- voucher system
- wage system
- wage labour system
- warehousing system
- waste disposal system
- waste handling system
- waste treatment system
- water system
- weighting system
- working system
- world system
- system of accounts
- system of administration
- system of bookkeeping
- system of classification
- system of control
- system of distribution
- system of information
- system of levies
- system of management
- system of marketing
- system of marking
- system of protective tariffs
- system of sales
- system of settlements
- system of tariffs
- system of taxation
- system of transportation
- system of units
- system of weights and measures
- bypass the banking system
- convert to a metric system
- design a system
- operate a system
- phase out the quota systemEnglish-russian dctionary of contemporary Economics > system
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12 fund
1. noun1) (of money) Fonds, der2. transitive verbbe short of funds — knapp od. schlecht bei Kasse sein (ugs.)
* * *1) (a sum of money for a special purpose: Have you given money to the repair fund?) das Kapital2) (a store or supply: He has a fund of funny stories.) der Vorrat•- academic.ru/101671/funds">funds* * *[fʌnd]I. ncontingency \fund Fonds m für außerordentliche Rückstellungendisaster \fund Notfonds m, Fonds m für Notfälleinvestment/trust \fund Investment-/Treuhandfonds mpension \fund Pensionsfonds m, Pensionskasse fsinking \fund Tilgungsfonds m, Amortisationsfonds mmanaged \fund [or \fund of \funds] Investitionsfonds m mit auswechselbarem Portefeuille3. (money)public \funds öffentliche Mittelconversion of \funds Veruntreuung f von Geldmitteln, Umleitung f von Geldmitteln für eigene Zweckeshareholders' \funds Eigenkapital ntto allocate \funds to sb/sth jdm/etw Gelder bewilligento be in \funds person gut bei Kasse sein fam; institution reichlich [Geld]mittel zur Verfügung habento be short of [or low on] \funds über wenig Geld verfügenI'm a bit low on \funds bei mir herrscht Ebbe in der Kasse famto convert \funds to another purpose Gelder veruntreuento convert \funds to one's own use Gelder veruntreuen [o umleiten]to disburse \funds to sb/sth jdm/etw Gelder zuteilen, an jdn/etw Gelder verteilento raise \funds [for sth] [für etw akk] Geld [o Spenden] sammelnsb runs out of \funds das Geld geht jdm ausa \fund of information/knowledge eine Fülle von Informationen/KenntnissenII. vtto \fund a company ein Unternehmen finanzierento \fund a debt einen Kredit konsolidierento \fund debts FIN Schulden fundieren [o in langfristige Schulden umwandeln]privately \funded frei finanziert* * *[fʌnd]1. nto start a fund — einen Fonds einrichten or gründen
2) pl Mittel pl, Gelder plpublic funds — öffentliche Mittel pl, Staatsgelder pl
to be in funds — zahlungsfähig or bei Kasse (inf) sein
to be pressed for funds, to be short of funds — knapp bei Kasse sein (inf)
at the moment I haven't the funds — mir fehlen zurzeit die Mittel or Gelder pl
4) pl (Brit: government securities) Staatspapiere pl2. vt2) (= invest) money anlegen, investieren* * *fund [fʌnd]A s1. WIRTSCHa) Kapital n, Vermögen n, Geldsumme fb) Fonds m (zweckgebundene Vermögensmasse)2. pl WIRTSCH (Geld)Mittel pl, Gelder pl:sufficient funds genügende Deckung;for lack of funds mangels Barmittel oder Deckung;“no funds” (Scheck) „keine Deckung“;3. pl WIRTSCHa) Br Staatspapiere pl, -anleihen plb) US Effekten plhe has quite a fund of jokes er weiß eine Menge WitzeB v/t1. WIRTSCH Br Gelder in Staatspapieren anlegenfunded debt fundierte Schuld, Anleiheschuld f* * *1. noun1) (of money) Fonds, der2. transitive verbbe short of funds — knapp od. schlecht bei Kasse sein (ugs.)
* * *n.Kapital -e n. -
13 lead
1. n грузило, отвес2. n мор. лотto cast the lead — бросать лот, мерить глубину лотом
3. n сл. пуля, пули4. n l5. n свинцовые полосы для покрытия крыши6. n покрытая свинцом крыша; плоская крышаunder the leads — на чердаке, под крышей
7. n графит; карандашный грифельpot lead — графит, чёрный свинец
8. n полигр. свинец, гарт9. n полигр. шпоны10. n диал. котелок, котёлlead balloon — неудача; провал
11. v тех. освинцовывать, покрывать свинцом12. v полигр. разделять шпонами, прокладывать шпоны; набирать на шпоны13. n руководство; инициативаto take the lead — брать на себя руководство, проявлять инициативу
14. n примерlead the way — идти во главе; показывать пример
15. n указание, директива16. n ключ; намёк17. n развёрнутый подзаголовок, аннотация18. n вводная часть19. n первое предложение или первый абзац информационной статьи20. n газетная информация, помещённая на видном месте21. n первенство, первое место22. n преим. спорт. преимущество, перевес23. n поводок; привязь24. n театр. кино25. n главная роль26. n исполнитель или исполнительница главной роли27. n карт. ход; первый ход28. n карт. карта, масть29. n карт. разг. дорожка, тропинка30. n карт. искусственное русло31. n карт. разводье; проход32. n карт. эл. подводящий проводground lead — земляной провод; земляной вывод
33. n карт. ошиновка, электропроводка34. n карт. трубопровод; канал35. n карт. тех. шаг или ход36. n карт. тех. отводной блок37. n карт. тех. центрирующая фаска38. n карт. тех. опережение, предварение39. n карт. воен. упреждение, приведение огня40. n карт. геол. жила, жильное месторождение41. n карт. геол. золотоносный песок42. n карт. тех. стрела; укосина43. v вести; показывать путьto lead a fast life — вести беспутную жизнь, прожигать жизнь
44. v руководить, возглавлять; управлятьtake the lead — быть впереди; возглавлять
45. v занимать первое место; быть впереди46. v спорт. идти первым; вести, лидироватьthe big chestnut was leading by three lengths — большая гнедая лошадь опередила других на три корпуса
47. v спорт. вести по очкам; иметь, набрать больше очковlead away — увести, увлечь
48. v превосходитьas an actor he certainly leads — как актёр он, несомненно, не имеет себе равных
49. v вести, приводить50. v выходить, сообщаться51. v вести, служить проводом или каналом52. v приводить; вызвать; быть причиной, иметь результатомto lead nowhere — ни к чему не привести, оказаться безрезультатным
to lead to crime — вести, приводить к совершению преступления
53. v убедить, склонить; заставить, повлиять54. v вовлекать55. v юр. задавать наводящие вопросы56. v карт. ходить57. v воен. упреждать58. v шотл. юр. свидетельствовать; представлятьСинонимический ряд:1. chief (adj.) chief; main; prime; principal; supreme2. first (adj.) first; front; head; primary3. advance (noun) advance; first place; foremost4. clue (noun) clue; evidence; hint; scent5. direction (noun) direction; leadership; management6. example (noun) example; guidance; model; pattern7. head (noun) boss; head; king; precedence; president; vanguard8. leader (noun) bellwether; dean; doyen; guide; leader; pilot9. leading lady (noun) leading lady; leading man; prima donna; principal; protagonist; star10. weight (noun) plumb; weight11. command (verb) captain; command; dominate; reign; rule12. convert (verb) bring; convert; move; persuade13. go (verb) carry; extend; go; reach; run; stretch14. guide (verb) conduct; convey; direct; escort; go before; guide; introduce; manage; moderate; pilot; precede; preface; route; see; shepherd; show; steer; usher15. influence (verb) allure; convince; entice; induce; influence; lure; seduce16. live (verb) live; pass; pursue17. surpass (verb) beat; excel; outstrip; overtake; surpass; transcendАнтонимический ряд:accede; acquiesce; assent; assist; attend; comply; concede; concur; conform; consent; dissuade; follow; help; imitate; last; obey; secondary; trail -
14 dynamic disk
"A physical disk that provides features that basic disks do not, such as support for volumes that span multiple disks. Dynamic disks use a hidden database to track information about dynamic volumes on the disk and other dynamic disks in the computer. You convert basic disks to dynamic by using the Disk Management snap-in or the DiskPart command-line tool. When you convert a basic disk to dynamic, all existing basic volumes become dynamic volumes." -
15 transfer
1. n перенос, перенесение; перемещение2. n переходtransfer instruction — команда пересылки; команда перехода
3. n тот, кто переводитсяa limited number of transfers may be accepted by the college — колледж может принять в порядке перевода ограниченное число студентов
4. n передачаlegal transfer — передача, требующая юридического оформления
radial transfer — радиальная передача; радиальная пересылка
5. n предмет передачиimage transfer — передача изображения; перенос изображения
6. n юр. уступка, передача; цессия7. n трансферт; документ о передаче, документ о переводе ценной бумаги с одного лица на другое8. n преим. амер. перевод; перечислениеbank transfer — банковский трансферт; перевод
9. n преим. амер. пересадочный пункт, пункт пересадки10. n преим. амер. пересадка11. n преим. амер. пересадочный билетmay I have a transfer, please? — дайте мне, пожалуйста, транзитный билет
12. n преим. амер. перевозка грузов13. n преим. амер. паром14. n преим. амер. переводные картинки15. n преим. амер. полигр. зеркальный оттиск16. n преим. амер. перевод красок на холст17. v переносить, перемещать; переставлять; перекладывать; перевозить18. v переходить, переводиться19. v юр. передавать, уступать20. v переводить; перечислятьthis farm has been transferred from father to son for generations — на протяжении многих поколений эта ферма переходила от отца к сыну
21. v делать пересадку, пересаживаться22. v преобразовывать; превращать23. v переводить рисунок на другую поверхность,Синонимический ряд:1. delivery (noun) delivery; surrender2. grant (noun) grant3. relocation (noun) relocation; transferral; transmittal4. shift (noun) assignment; change; movement; shift; traffic; translocation5. carry (verb) carry; deliver; transport6. convey (verb) abalienate; alien; alienate; assign; cede; consign; convey; deed; grant; make over; remise; sign; sign over7. give (verb) dish out; dispense; feed; find; furnish; give; hand; hand over; provide; supply; turn over8. move (verb) dislocate; disturb; manoeuvre; move; relocate; remove; shift; ship9. send (verb) refer; send10. transform (verb) change; commute; convert; metamorphize; metamorphose; mutate; transfigure; transform; translate; transmogrify; transmute; transpose; transubstantiateАнтонимический ряд:appropriate; fix; keep; retain; withhold -
16 bring
bring [brɪŋ](preterite, past participle brought) transitive verba. [+ person, animal, vehicle, peace] amener ; [+ object, news, information] apporter• to bring sb up/down faire monter/faire descendre qn (avec soi)• to bring sth up/down monter/descendre qchb. ( = cause) [+ problems] créer• to bring sth (up)on o.s. s'attirer qch• to bring sth to a close or an end mettre fin à qch• to bring sth into question ( = throw doubt on) remettre qch en questionc. ► to bring o.s. to do sth• can I bring a friend along? est-ce que je peux amener un ami ?► bring back separable transitive verbb. ( = call to mind) rappelera. [+ plane] faire atterrir ; ( = shoot down) [+ animal, bird, plane] abattreb. [+ dictator, government] faire tomber ; [+ temperature, prices, cost of living] faire baisserb. ( = advance time of) avancera. [+ person] faire entrer ; [+ object, harvest] rentrerb. [+ custom, legislation] introduire ; [+ expert, army] faire appel àc. [+ income] rapporterd. to bring in a verdict [jury] rendre un verdict[+ plan, deal] mener à bien( = cause) [+ illness, quarrel] provoquerb. [+ book] faire paraître ; [+ new product] lancerb. [+ unconscious person] ranimerc. ( = convert) gagner (to à)a. ( = put in touch) [+ people] mettre en contactb. ( = end quarrel between) réconcilierc. [+ facts, documents] rassemblera. [+ person] faire monter ; [+ object] monterb. [+ child] élever• well/badly brought-up child enfant m bien/mal élevéc. ( = vomit) vomird. [+ fact, allegation, problem] mentionner ; [+ question] soulever* * *[brɪŋ] 1.(prét, pp brought) transitive verb1) (convey, carry) apporterto bring somebody wealth/fame — rendre quelqu'un riche/célèbre
to bring something to — ( contribute) apporter quelque chose à [school, work, area]
to bring something into — faire entrer quelque chose dans [room]; introduire quelque chose dans [conversation]
to bring shame/disgrace on somebody — attirer la honte/le déshonneur sur quelqu'un
to bring something on ou upon oneself — attirer quelque chose
2) ( come with) amener [friend, relative, dog]3) (lead, draw)to bring somebody/a dog into the country — faire entrer or introduire quelqu'un/un chien dans le pays
to bring somebody home — ( transport home) raccompagner quelqu'un, ramener quelqu'un; ( to meet family) amener quelqu'un à la maison
4) Television, Radio5) Law, Administration2.I couldn't bring myself to get up/to tell him — je n'ai pas pu me lever/le lui dire
Phrasal Verbs:- bring in- bring on- bring up -
17 collection ratio
Finthe average number of days it takes a firm to convert its accounts receivable into cash.EXAMPLEIdeally, this period should be decreasing or constant. A low figure means the company collects its outstanding receivables quickly. Collection ratios are usually reviewed quarterly or yearly.Calculating the collection ratio requires three figures: total accounts receivable, total credit sales for the period analyzed, and the number of days in the period (annual, 365; six months, 182; quarter, 91). The formula is:accounts receivable/total credit sales for the period × number of days in the periodFor example: if total receivables are $4,400,000, total credit sales in a quarter are $9,000,000, and number of days is 91, then:4,500,000/9,000,000 × 91 = 45.5Thus, it takes an average 45.5 days to collect receivables.Properly evaluating a collection ratio requires a standard for comparison. A traditional rule of thumb is that it should not exceed a third to a half of selling terms. For instance, if terms are 30 days, an acceptable collection ratio would be 40 to 45 days.Companies use collection ratio information with an accounts receivable aging report. This lists four categories of receivables: 0–30 days, 30–60 days, 60–90 days, and over 90 days. The report also shows the percentage of total accounts receivable that each group represents, allowing for an analysis of delinquencies and potential bad debts.Also known as days’ sales outstanding -
18 convertible preferred stock
Finstocks that give the holder the right to exchange them at a fixed price for another security, usually common stock.EXAMPLEPreferred stocks and other convertible securities offer investors a hedge: fixed-interest income without sacrificing the chance to participate in a company’s capital appreciation.When a company does well, investors can convert their holdings into common stock that is more valuable. When a company is less successful, they can still receive interest and principal payments, and also recover their investment and preserve their capital if a more favorable investment appears.Conversion ratios and prices are key facts to know about preferred stocks. This information is found on the indenture statement that accompanies all issues. Occasionally the indenture will state that the conversion ratio will change over time. For example, the conversion price might be $50 for the first five years, $55 for the next five years, and so forth. Stock splits can affect conversion considerations.In theory, convertible preference shares (and convertible exchangeable preference shares) are usually perpetual in time. However, issuers tend to force conversion or induce voluntary conversion for convertible preference shares within ten years. Steadily increasing ordinary share dividends is one inducement tactic used. As a result, the conversion feature for preference shares often resembles that of debt securities. Call protection for the investor is usually about three years, and a 30- to 60-day call notice is typical.About 50% of convertible equity issues also have a “soft call provision.” If the ordinary share price reaches a specified ratio, the issuer is permitted to force conversion before the end of the normal protection period.The ultimate business dictionary > convertible preferred stock
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19 Armstrong, Edwin Howard
[br]b. 18 December 1890 New York City, New York, USAd. 31 January 1954 New York City, New York, USA[br]American engineer who invented the regenerative and superheterodyne amplifiers and frequency modulation, all major contributions to radio communication and broadcasting.[br]Interested from childhood in anything mechanical, as a teenager Armstrong constructed a variety of wireless equipment in the attic of his parents' home, including spark-gap transmitters and receivers with iron-filing "coherer" detectors capable of producing weak Morse-code signals. In 1912, while still a student of engineering at Columbia University, he applied positive, i.e. regenerative, feedback to a Lee De Forest triode amplifier to just below the point of oscillation and obtained a gain of some 1,000 times, giving a receiver sensitivity very much greater than hitherto possible. Furthermore, by allowing the circuit to go into full oscillation he found he could generate stable continuous-waves, making possible the first reliable CW radio transmitter. Sadly, his claim to priority with this invention, for which he filed US patents in 1913, the year he graduated from Columbia, led to many years of litigation with De Forest, to whom the US Supreme Court finally, but unjustly, awarded the patent in 1934. The engineering world clearly did not agree with this decision, for the Institution of Radio Engineers did not revoke its previous award of a gold medal and he subsequently received the highest US scientific award, the Franklin Medal, for this discovery.During the First World War, after some time as an instructor at Columbia University, he joined the US Signal Corps laboratories in Paris, where in 1918 he invented the superheterodyne, a major contribution to radio-receiver design and for which he filed a patent in 1920. The principle of this circuit, which underlies virtually all modern radio, TV and radar reception, is that by using a local oscillator to convert, or "heterodyne", a wanted signal to a lower, fixed, "intermediate" frequency it is possible to obtain high amplification and selectivity without the need to "track" the tuning of numerous variable circuits.Returning to Columbia after the war and eventually becoming Professor of Electrical Engineering, he made a fortune from the sale of his patent rights and used part of his wealth to fund his own research into further problems in radio communication, particularly that of receiver noise. In 1933 he filed four patents covering the use of wide-band frequency modulation (FM) to achieve low-noise, high-fidelity sound broadcasting, but unable to interest RCA he eventually built a complete broadcast transmitter at his own expense in 1939 to prove the advantages of his system. Unfortunately, there followed another long battle to protect and exploit his patents, and exhausted and virtually ruined he took his own life in 1954, just as the use of FM became an established technique.[br]Principal Honours and DistinctionsInstitution of Radio Engineers Medal of Honour 1917. Franklin Medal 1937. IERE Edison Medal 1942. American Medal for Merit 1947.Bibliography1922, "Some recent developments in regenerative circuits", Proceedings of the Institute of Radio Engineers 10:244.1924, "The superheterodyne. Its origin, developments and some recent improvements", Proceedings of the Institute of Radio Engineers 12:549.1936, "A method of reducing disturbances in radio signalling by a system of frequency modulation", Proceedings of the Institute of Radio Engineers 24:689.Further ReadingL.Lessing, 1956, Man of High-Fidelity: Edwin Howard Armstrong, pbk 1969 (the only definitive biography).W.R.Maclaurin and R.J.Harman, 1949, Invention \& Innovation in the Radio Industry.J.R.Whitehead, 1950, Super-regenerative Receivers.A.N.Goldsmith, 1948, Frequency Modulation (for the background to the development of frequency modulation, in the form of a large collection of papers and an extensive bibliog raphy).KFBiographical history of technology > Armstrong, Edwin Howard
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20 Fessenden, Reginald Aubrey
[br]b. 6 October 1866 East Bolton, Quebec, Canadad. 22 July 1932 Bermuda[br]Canadian radio pioneer who made the first known broadcast of speech and music.[br]After initial education at Trinity College School, Port Hope, Ontario, Fessenden studied at Bishops University, Lennoxville, Quebec. When he graduated in 1885, he became Principal of the Whitney Institute in Bermuda, but he left the following year to go to New York in pursuit of his scientific interests. There he met Edison and eventually became Chief Chemist at the latter's Laboratory in Orange, New Jersey. In 1890 he moved to the Westinghouse Electric and Manufacturing Company, and two years later he returned to an academic career as Professor of Electrical Engineering, initially at Purdue University, Lafayette, Indiana, and then at the Western University of Pennsylvania, where he worked on wireless communication. From 1900 to 1902 he carried out experiments in wireless telegraphy at the US Weather Bureau, filing several patents relating to wire and liquid thermal detectors, or barretters. Following this he set up the National Electric Signalling Company; under his direction, Alexanderson and other engineers at the General Electric Company developed a high-frequency alternator that enabled him to build the first radiotelephony transmitter at Brant Rock, Massachusetts. This made its initial broadcast of speech and music on 24 December 1906, received by ship's wireless operators several hundred miles away. Soon after this the transmitter was successfully used for two-way wireless telegraphy communication with Scotland. Following this landmark event, Fessenden produced numerous inventions, including a radio compass, an acoustic depth-finder and several submarine signalling devices, a turboelectric drive for battleships and, notably, in 1912 the heterodyne principle used in radio receivers to convert signals to a lower (intermediate) frequency.[br]Principal Honours and DistinctionsInstitute of Electrical and Electronics Engineers Medal of Honour 1921.BibliographyUS patents relating to barretters include nos. 706,740, 706,742 and 706,744 (wire, 1902) and 731,029 (liquid, 1903). His invention of the heterodyne was filed as US patent no. 1,050,441 (1913).Further ReadingHelen M.Fessenden, 1940, Fessenden. Builder of Tomorrow. E.Hawkes, 1927, Pioneers of Wireless, London: Methuen. O.E.Dunlop, 1944, Radio's 100 Men of Science.KFBiographical history of technology > Fessenden, Reginald Aubrey
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