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41 WSDC
1) Спорт: Wisconsin Sports Development Corporation2) Военный термин: Weapons Systems Development Command, weapon system design criteria3) Биржевой термин: Wall Street Discount Corporation5) Театр: Whistle Stop Dance Company6) Физиология: Washington State Diabetes Collaborative7) Фирменный знак: Web Services Developer Center -
42 mDC
1) Общая лексика: Management Development Committee (SEIC)2) Компьютерная техника: MDT Digitizing Card, Message Digest Code, Mobile Data Computer3) Военный термин: Mega Damage Counters, Military Destroyer Class, Missile Development Center, Mobile Data Center, machinability data center, main display console, maintenance data collection, manual direction center, master direction center, master display controller, material distribution center, message distribution center, meteorological data collection, mild detonating cord, mine destruction charge, mine distribution canister, miniature detonating cord, miss distance calculator, missile direction center, mission direction center, mission duty cycle, movement designator code, multiple drone control5) Шутливое выражение: Missouri Department Of Communism6) Химия: Methylene Dichloride7) Юридический термин: Metropolitan Detention Center, Military District Court, Most Dangerous Corner8) Бухгалтерия: Miscellaneous Debits And Credits9) Ветеринария: Milk Development Council11) Телекоммуникации: Monthly Demand Charge12) Сокращение: Maintenance Data Centre (UK Royal Air Force), Major Distribution Centre, Materiel Distribution Center (Topeka, KS), McDonnell Douglas Corp. (USA), Military Discipline Code (South Africa), Mine Data Centre, Radio set control group (Spain), miniaturized digital computer, more developed country, motor direct-connected, Metropolitan District Commission (Mass State Agency), Maintenance Data Centre, Maintenance Dependency Chart, Movement for Democratic Change13) Физиология: Major Diagnostic Category, Minimum detectable concentration14) Вычислительная техника: Meta Data Coalition, Message conversion system directory Component (MCS)15) Нефть: major dull characteristics, monel drill collars, сбор данных о техническом обслуживании (maintenance data collection), технологическая схема последовательности работ по техническому обслуживанию (maintenance dependency chart), центр сбора данных о техническом обслуживании (maintenance data center)16) Пищевая промышленность: Macrophage Derived Chemokine17) Воздухоплавание: McDonnell Douglas Corporation18) Фирменный знак: Michigan Drywall And Ceiling, Morphos Developer Connection19) Сетевые технологии: Maintenance Domain Controller, Multi-Device Controller, контроллер нескольких периферийных устройств20) Автоматика: McDonnel-Douglas Corporation21) Океанография: Mini Drift Chamber22) Химическое оружие: Material decontamination chamber23) Безопасность: Message Digest Cipher, manipulation detection code, modification detection code24) Расширение файла: Materials Distribution Center25) Маркетология: Million Dollar Club, Клуб Долларовых Миллионеров26) Фантастика Mega Damage Capacity27) Здравоохранение: Medicines Development Centre, Multidisciplinary Clinic28) Правительство: Metropolitan District Commission29) NYSE. M D C Holdings, Inc.31) Базы данных: Mapped Diagnostic Context -
43 response time
<tech.gen> (e.g. of a system, device) ■ Ansprechdauer f<tech.gen> ■ Ansprechzeit f< edp> ■ Antwortzeit f<el> ■ Einschwingzeit f<i&c> ■ Anschwingzeit f<i&c> (of a sensor; to) ■ Ansprechverzug m<i&c> (of sensor; to produce a stable output signal) ■ Ansprechzeit f ; Einstellzeit f ; Einstelldauer f DIN 1319 ; Reaktionszeit f rar<i&c> ■ Trägheit f -
44 JDC
1) [Japanese cellular system] японская цифровая система сотовой подвижной радиотелефонной связи, система (стандарта) JDC2) [Java Developer Connection] служба поддержки пользователей Java, служба JDC -
45 unit
1) единица, число 1 ( наименьшее положительное целое число)2) единица (физической) величины; единица измерения ( величины)3) элемент; компонент4) нейрон5) блок; узел; модуль; секция; звено6) прибор; устройство7) аппарат; установка•- unit under test
- abrasive-cleaning unit
- absolute units
- acknowledgement signal unit
- acoustic units
- allocation unit
- angle-tracking unit
- Ångström unit
- answer-back unit
- answering unit
- antenna coupler unit
- anticoincidence unit
- arbitrary unit
- arithmetic unit
- arithmetic and logic unit
- assembly unit
- associative unit
- attached unit
- audio processing unit
- audio-response unit
- automatic calling unit
- automatic lock-on unit
- automatic range tracking unit
- auxiliary power unit
- balanced-armature unit
- balancing unit
- base station unit
- base station control unit
- basic display unit
- basic measurement unit
- basic processing unit
- beam steering unit
- best matching unit
- bistable unit
- break-contact unit
- bubble unit
- bubble storage unit
- buffer unit
- bus interface unit
- camera control unit
- capacitor-resistor unit
- card punch unit
- card punching unit
- card-reader unit
- cassette unit
- central processing unit
- certificate signing unit
- CGS units
- changeover-contact unit
- channel unit
- channel service unit
- channel service unit/digital service unit
- chrominance unit
- clock unit
- cluster unit
- coefficient unit
- coil-spring reverberation unit
- coincidence unit
- communications control unit
- competitive unit
- computer interface unit
- connectionist unit
- control unit
- control-display unit
- converter unit
- conveyorized drying unit
- crosstalk unit
- curve scanning unit
- data unit
- data-acquisition unit
- data-adapter unit
- data-collection unit
- data encryption unit
- data-handling unit
- data transfer unit
- delay unit
- derived units
- developer unit
- dialing unit
- differentiating unit
- digital reverberation-echo unit
- digital service unit
- digital storage unit
- discrete unit
- disk unit
- display unit
- driver unit
- dual processing unit
- electron unit
- ENIGMA duration unit
- ENIGMA virtual page unit
- execution unit
- expansion unit
- experimental unit
- failed unit
- failure unit
- fixed-head disk unit
- floating-point processing unit
- forming unit
- frequency identification unit
- fuel-cell unit
- function unit
- fundamental units
- GeForce graphics processing unit
- geometrical unit
- graphics processing unit
- hidden unit
- hidden-layer unit
- Horner unit
- imaginary unit
- inductive energy storage unit
- inertial measurement unit
- information unit
- in-order retirement unit
- input unit
- input/output unit
- inquiry unit
- instruction unit
- instruction fetch unit
- integrating unit
- interface unit
- internetwork unit
- interrogating unit
- I/O control unit
- LAN access unit
- language unit
- line terminal unit
- logical unit
- magnetic-core storage unit
- magnetic tape unit
- mains unit
- make-contact unit
- matching unit
- matrix unit
- maximum transmission unit
- measurement unit
- medium attachment unit
- memory unit
- memory management unit
- microcontrol unit
- microprocessing unit
- microprocessor unit
- microprocessor control unit
- microprocessor-controlled unit
- microprogrammed unit
- MKS units
- mobile TV unit
- modular unit
- motor unit
- movable-head disk unit
- multiple unit
- multiplier unit
- multiply/accumulate unit
- multipoint control unit
- multistation access unit
- near-eye unit
- nerve unit
- network interface unit
- neural-like unit
- neuromotor unit
- numeric processing unit
- observation unit
- off-line unit
- on-line unit
- orderwire unit
- output unit
- paged memory management unit
- parallel arithmetic unit
- perceptual unit
- peripheral unit
- peripheral interface unit
- peripheral processing unit
- permanent storage unit
- piezoelectric-crystal unit
- pluggable unit
- plug-in unit
- processing unit
- processor unit
- producer's desk unit
- program-control unit
- protected data unit
- protocol data unit
- prototype unit
- quartz-crystal unit
- radio channel unit
- random-access storage unit
- reader unit
- read-write unit
- receptor unit
- recording unit
- register, arithmetic and logic unit
- reproducing unit
- reserve unit
- resistor-capacitor unit
- response unit
- reverberation unit
- sample unit
- sampling unit
- satellite delay compensation unit
- secure access unit
- secure telephone unit
- self-contained unit
- semantic unit
- sensory unit
- serial arithmetic unit
- service unit
- service protocol unit
- shaker unit
- SI units
- six-head tape-loop echo-reverberation unit
- slide unit
- spare unit
- standby unit
- start unit
- stop unit
- storage unit
- summing unit
- system processing unit
- tape unit
- telecine unit
- terminal unit
- terminal-control unit
- terminal-interchange unit
- time-base unit
- time processor unit
- timing unit
- traffic unit
- translation unit
- transmission control unit
- trichromatic unit
- tuning unit
- turntable unit
- ultimate sampling unit
- visual display unit
- voice-response unit
- volume unit
- winning unit
- wire-stripping unit
- word-processing unit
- writing unit -
46 JDC
1) сокр. от Japanese cellular system японская цифровая система сотовой подвижной радиотелефонной связи, система (стандарта) JDC2) сокр. от Java Developer Connection служба поддержки пользователей Java, служба JDCThe New English-Russian Dictionary of Radio-electronics > JDC
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47 roller
1) валок; вал, каток; валик; ролик; бегунок; (вращающийся) цилиндр или барабан2) матричный каландрАнгло-русский словарь по полиграфии и издательскому делу > roller
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48 application
= app1) (см. тж. software application) - приложение, прикладная программазаконченная прикладная программа или пакет, которые обеспечивают пользователю решение определённой задачи, например электронная таблица или текстовый процессор. Типичные словосочетания - Windows application (Windows-приложение), Linux application (Linux-приложение). Термин широко распространился, заменив термин application program в связи с тем, что приложение подразумевает работу с ним посредством графического интерфейса пользователя (GUI), а не из командной строкиAnt:см. тж. active application, application certification, application complexity, application context, application designer, application developer, application development, application domain, application framework, application gateway, application generator, application heap, application integration, application layer, application mining, application package, application partitioning, application profiling, application programmer, application server, application software, application suite, application window, client application, command line, console application, consumer application, critical application, database application, distributed application, embedded applications, engineering applications, enterprise application, government application, graphics application, householding application, information application, legacy application, managed application, meta-application, mobile application, multimedia application, multimodal application, multithreaded application, multi-tier application, network application, notification application, rugged application, scientific application, server application, software, target application, web application2) см. hardware application3) применение, использование, употребление; применимостьнапример, for military applications - для военных применений4) заявление, заявканапример, partial application - частичное присваивание значений (если значения присвоены не всем аргументам)см. тж. argument6) наложение; нанесение; аппликациясм. тж. compositingАнгло-русский толковый словарь терминов и сокращений по ВТ, Интернету и программированию. > application
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49 SDK
1) Software Development (Developer's) Kit - набор средств для разработки ПО, комплект программ для разработчика ПОобычно содержит инструменты для создания новых программ и интерфейсов (меню, пиктограмм, диалоговых окон и т. д.) и поставляется производителем системного ПО, чтобы дать возможность третьим фирмам разработать приложения под свои продукты и тем самым повысить их ценность для покупателейсм. тж. toolkit2) System Design Kit - комплект разработчика системы; прототипная платаплата, аксессуары и ПО для макетирования проблемной части системыАнгло-русский толковый словарь терминов и сокращений по ВТ, Интернету и программированию. > SDK
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50 software development
разработка ПО, программированиеметодология и совокупность этапов создания программы, приложения, системы. Для встраиваемого ПО на первых этапах его разработки обычно используется компьютерное моделирование (simulation), поскольку (если) ещё не создана целевая аппаратура; следующие этапы - это лабораторные прототипы (laboratory prototype), пилотные прототипы (pilot prototype) и, наконец, реальная производственная система (production system)Англо-русский толковый словарь терминов и сокращений по ВТ, Интернету и программированию. > software development
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51 positive
1. n нечто положительное, положительностьpositive balance — положительный итог; положительный остаток
positive logic — положительная логика; позитивная логика
2. n нечто реальное, реальностьhis surmise was transcribed by others as a positive statement — его догадка трансформировалась в сознании других людей в утверждение; то, что он высказал как догадку, было воспринято другими как утверждение
3. n грам. положительная степень4. n фото позитив5. n эл. положительная пластина6. n муз. церк. позитив7. a несомненный; определённый, совершенно ясный8. a точный, определённый9. a решительный; категорический10. a положительный, утвердительный11. a верный, достоверный12. a уверенный, убеждённый в правильностиare you sure? — Yes, I am positive — вы уверены? — Да, совершенно
13. a самоуверенный14. a настоящий, определённый15. a разг. абсолютный, сущий; законченный16. a абсолютный, безусловный, безотносительный17. a позитивный; конструктивный18. a фото позитивный19. a тех. принудительный; нагнетательный; вдувной20. a спец. движущийся, вращающийся по часовой стрелке; правовращающийся21. a опт. вращающий плоскость поляризации вправо22. a опт. собирающийСинонимический ряд:1. actual (adj.) absolute; actual; factual; genuine; hard; sure-enough2. affirmative (adj.) affirmative; hopeful; optimistic3. beneficial (adj.) beneficial; constructive; functional; practical4. certain (adj.) assured; certain; cocksure; confident; convinced; inarguable; incontrovertible; indubitable; irrebuttable; irrefutable; overbearing; over-confident; secure; sure; uncontestable; uncontrovertible; undeniable; undisputable; undoubtable; undoubting; unhesitating; unquestionable5. decided (adj.) arbitrary; decided; decisive; determined; enacted; unconditional6. emphatic (adj.) assertive; dogmatic; emphatic; expressed; obstinate; peremptory; resolute; stated7. favourable (adj.) assenting; favourable8. incontestable (adj.) categorical; clear; clear-cut; definite; direct; explicit; express; incontestable; indisputable; precise; specific; unambiguous; unequivocal9. right-handed (adj.) clockwise; dextrorotatory; right-handed10. utter (adj.) all-fired; arrant; black; blamed; blank; blankety-blank; blasted; bleeding; blessed; blighted; blinding; blithering; blue; complete; confounded; consummate; crashing; dad-blamed; dad-blasted; dad-burned; damned; dang; darn; dashed; deuced; doggone; double-distilled; durn; utterАнтонимический ряд:contingent; contradictory; dependent; destructive; disputable; doubtful; dubious; enigmatic; equivocal; fictitious; hazy; insecure; negative; questionable -
52 brush
1. щётка; кисть, кисточка2. торшонировать корешок блока щёткой3. напылять щёткойair brush — аэрограф; пульверизатор
developer brush — проявляющая кисть; проявляющая щётка
glue brush — клеемазальная щётка, клеемазальная кисть
magnetic brush — «магнитная кисть»
magnetic brush of toner mix — «магнитная кисть» из смеси частиц магнитного носителя и частиц тонера
magnetic development brush — проявляющая «магнитная кисть»
4. щётка для очистки листа от бумажной пыли5. задняя отделяющая щётка -
53 roller
1. валок; вал, каток; валик; ролик; бегунок; цилиндр или барабан2. матричный каландрadjusting roller — валик, стабилизирующий подачу
all-season roller — валик, сохраняющий свои размеры при изменении температуры и влажности окружающей среды
3. прижимный валик, пресс-цилиндр4. подающие ролики5. опорный валикroller setting — регулировка валиков; установка валиков
6. фальцевальный валик, фальцвалик7. лентонаправляющий валик8. валики, обжимающие сфальцованную на воронке лентуbreak-out roller — отрывной валик, валик для отрыва по месту перфорации
9. лентоподающий валик, ролик лентоподающей пары; лентопроводящий валик; лентоведущий ролик10. самоустанавливающийся валик11. амортизационный валикcovered roller — облицованный валик, валик с покрытием
12. брит. передаточный валик красочного аппарата дукторного типаdampening system rollers — увлажняющий аппарат, валики увлажняющего аппарата
13. распределительный валик14. раскатной валик; раскатной цилиндрdoctor roller — ракель, имеющий форму валика или стержня; валик, снимающий избыток краски или влаги
15. тянущий валик; приводной ролик16. бумагопроводящий валик17. периодически действующий лентоподающий валикduct roller — дуктор, дукторный вал
dusting roller — пылеснимающий валик, валик для очистки от пыли
equalizer roller — стабилизирующий валик; выравнивающий валик; амортизирующий валик
18. накатной валик19. подающий валик, подающий ролик, ролик подающей пары; проводящий валик, ведущий роликcoating roller — валик, наносящий покрытие
20. валики накопителя ленты21. валики, установленные зигзагообразноfilmer roller — валик, несущий тонкий слой
flexible doctor roller — эластичный ракель, имеющий форму валика или стержня
fold roller — фальцевальный валик, фальцвалик
folding roller — фальцевальный валик, фальцвалик
forming roller — фальцевальный валик, фальцвалик
forwarder roller — ведущий валик; транспортирующий ролик
fountain roller — дуктор, дукторный вал
22. валик, дозирующий подачу краскиsensor roller — валик, несущий датчик
23. накатной валик красочного аппаратаink mist suppression roller — валик, предотвращающий образование красочного тумана
ink-receiving roller — краскоприёмный валик; приёмный цилиндр раскатной группы красочного аппарата
ink-source roller — дуктор, дукторный вал
lithographic roller — нажимной валик, печатный цилиндр
monitoring roller — дозирующий валик; контрольный валик
nip rollers — пара контактирующих валиков; листопроводящая или лентопроводящая пара валиков
over-speed roller — валик, вращающийся с повышенной скоростью
paper guide roller — бумаговедущий валик, бумагонаправляющий валик
compensator roller — валик, стабилизирующий подачу
glazed roller — гладкий валик; полированный валик
24. плавающий валик25. передаточный валик красочного аппаратаrubber-covered roller — валик, облицованный резиной
26. дуктор, дукторный вал27. отделяющий роликplate inking roller — накатной красочный валик, накатной валик красочного аппарата
porous ink roller — валик с пористой поверхностью, пропитанной краской; красочный валик, имеющий пористое покрытие
porous-type ink supply roller — краскоподающий валик, имеющий пористое покрытие
porous-volume compressible roller — валик, сжимающийся в объёме
power roller — ведущий валик; ведущий ролик; валик, используемый для привода
power roller — приводной цилиндр, цилиндр, имеющий принудительный привод
28. валик печатной машины29. прижимный валик, прижимный роликpressure roller — прижимный валик, нажимной цилиндр, пресс-цилиндр
30. печатный валик; печатный цилиндрribbed roller — рифленый валец; рифленый вал
31. формный валик; формный цилиндрchill roller — охлаждающий валик; охлаждающий цилиндр
32. приёмный бумаговедущий роликreceiving roller — приёмный валик, валик на набегающей стороне
reciprocating roller — цилиндр, имеющий осевое перемещение
33. обрезиненный передаточный валик34. обрезиненный периодически действующий лентоподающий валикsand-blasted roller — валик, прошедший пескоструйную обработку
screen roller for paper converting and coating machines — растрированный валик для бумагоперерабатывающих машин и машин для нанесения покрытий
35. грузовой красочный валик; валик, накатывающий краску под действием собственного веса36. автоматически действующий накатной красочный валик37. валик, несущий датчик38. валик, выполняющий роль датчика в системе автоматического регулирования натяжения ленты39. прозрачный валик для измерения толщины слоя краскиseparation roller — отделяющий валик, листоотделяющий ролик
shot-peened roller — валик, поверхность которого упрочнена дробеструйной обработкой
40. валик обжимного устройства41. разглаживающий валикsqueegee roller — отжимный валик, резиновый валик
42. прижимный валик; прижимный цилиндр43. стальной цилиндрsubject roller — формный валик; формный цилиндр
take-out roller — отделительный валик; выводной валик
tension roller — натяжной валик, валик для регулирования натяжения ленты
top roller — лентоведущий валик, лентоведущий валик
tracking roller — валик, на который отмарывает краска
stationary drum roller — раскатной цилиндр, не имеющий осевого перемещения
44. валик для переноса изображенияtransporting roller — транспортирующий цилиндр, передаточный барабан
trough roller — валик, купающийся в корыте
45. раскатной цилиндрvibrating distributor roller — раскатной цилиндр, имеющий осевое перемещение
46. передаточный валикvolume-compressible roller — валик, сжимающийся в объёме
washing roller — смывочный валик; валик для удаления загрязнения
water-cooled roller — валик, охлаждаемый водой
47. валик для удаления краски с пробельных элементов формы глубокой печати48. пара контактирующих валиков; листопроводящая или лентопроводящая пара валиковwithdrawing roller — подающий валик; тянущий валик
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54 Shingo, Shigeo
(1909–90) Gen MgtJapanese researcher and consultant. Inventor of the single minute exchange of dies and a developer of the Toyota production system. Methods to achieve zero defects were explained in Zero Quality Control (1985). -
55 Bond, George Meade
SUBJECT AREA: Mechanical, pneumatic and hydraulic engineering[br]b. 17 July 1852 Newburyport, Massachusetts, USAd. 6 January 1935 Hartford, Connecticut, USA[br]American mechanical engineer and metrologist, co-developer of the Rogers- Bond Comparator.[br]After leaving school at the age of 17, George Bond taught in local schools for a few years before starting an apprenticeship in a machine shop in Grand Rapids, Michigan. He then worked as a machinist with Phoenix Furniture Company in that city until his savings permitted him to enter the Stevens Institute of Technology at Hoboken, New Jersey, in 1876. He graduated with the degree of Mechanical Engineer in 1880. In his final year he assisted William A.Rogers, Professor of Astronomy at Harvard College Observatory, Cambridge, Massachusetts, in the design of a comparator for checking standards of length. In 1880 he joined the Pratt \& Whitney Company, Hartford, Connecticut, and was Manager of the Standards and Gauge Department from then until 1902. During this period he developed cylindrical, calliper, snap, limit, thread and other gauges. He also designed the Bond Standard Measuring Machine. Bond was elected a member of the American Society of Mechanical Engineers in 1881 and of the American Society of Civil Engineers in 1887, and served on many of their committees relating to standards and units of measurement.[br]Principal Honours and DistinctionsVice-President, American Society of Mechanical Engineers 1908–10. Honorary degrees of DEng, Stevens Institute of Technology 1921, and MSc, Trinity College, Hartford, 1927.Bibliography1881. "Standard measurements", Transactions of the American Society of Mechanical Engineers 2:81.1882. "A standard gauge system", Transactions of the American Society of MechanicalEngineers 3:122.1886, "Standard pipe and pipe threads", Transactions of the American Society of Mechanical Engineers 7:311.1887. Standards of Length and Their Practical Application, Hartford.Further Reading"Report of the Committee on Standards and Gauges", 1883, Transactions of the American Society of Mechanical Engineers 4:21–9 (describes the Rogers-Bond Comparator).RTS -
56 Chanute, Octave Alexandre
SUBJECT AREA: Aerospace[br]b. 18 February 1832 Paris, Franced. 24 November 1910 Chicago, USA[br]American engineer, developer of successful hang-gliders in the 1890s and disseminator of aeronautical information.[br]Chanute was born in Paris, but from the age of 6 he lived in the United States, where he became a prominent railway engineer. He developed an interest in aviation relatively late in life, and in fact built his first glider at the age of 64. Before that, he had collected all the information he could find on aviation, especially on the work of Otto Lilienthal in Germany. In 1894 he published an account of these researches in a classic work, Progress in Flying Machines.By 1896 Chanute was ready to carry out practical experiments of his own and designed a series of hang-gliders. He started with a Lilienthal-type monoplane and progressed to his very successful biplane glider. He used a bridge-truss method of cross-bracing to give his wings the required strength, a system used by many of his successors, including the Wright brothers. Chanute's gliders were flown on the shore of Lake Michigan by his two young assistants A.M.Herring and W.Avery. The biplane glider made some seven hundred flights without mishap, covering up to 100 m (110 yds). In 1898 Herring fitted an engine into a modified glider and claimed to have made two short hops.In 1900 the Wright brothers made contact with Chanute and sought his advice, which he readily gave, indeed, he became one of their most trusted advisors. In 1903 Chanute travelled to Paris and gave an illustrated lecture describing his own and the Wrights' gliding successes, generating much interest amongst European aviators.[br]Principal Honours and DistinctionsRoyal Aeronautical Society Gold Medal 1910.Bibliography1894, Progress in Flying Machines, New York (Chanute's classic work).Further ReadingC.H.Gibbs-Smith, 1986, Aviation, London.—1965, The Invention of the Aeroplane 1799–1909, London (both describe Chanute's place in the history of aviation).T.D.Crouch, A Dream of Wings, Americans and the Airplane 1875–1905 (includes several chapters on Chanute and a comprehensive bibliography).Chanute is also mentioned in most of the biographies of the Wright brothers.JDSBiographical history of technology > Chanute, Octave Alexandre
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57 Hounsfield, Sir Godfrey Newbold
SUBJECT AREA: Medical technology[br]b. 28 August 1919 Newark, Nottinghamshire, England[br]English scientist, inventor and developer of computer-assisted tomography (CAT) scanning technique of radiographic examination.[br]After an education in Newark and London in radiocommunications and radar, Hounsfield volunteered and served in the RAF during 1939–45. He was a lecturer at Cranwell Radar School from c.1942 to 1945. From 1947 to 1951 he undertook further study in electrical and mechanical engineering, and in 1951 he joined Electrical and Musical Instruments (EMI) Ltd, where he led the design team for the first British all-transistor computer (EMIDEC, 1959). In 1969–72 he invented and developed the EMI computerized transverse axial tomography scanner system of X-ray examination; this, while applicable to other areas of the body, particularly permitted the elimination of difficulties presented since the earliest days of X-ray examination in the examination of the cranial contents.[br]Principal Honours and DistinctionsKnighted 1981. CBE 1976. FRS 1975. Nobel Prize for Medicine or Physiology (jointly with A.M.Cormack) 1979.Bibliography1973, "Computerized transverse axial scanning (Tomography)", British Journal of Radiology, American Journal of Roentgenology.MGBiographical history of technology > Hounsfield, Sir Godfrey Newbold
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58 Keller, Arthur
[br]b. 18 August 1901 New York City, New York, USA d. 1983[br]American engineer and developer of telephone switching equipment who was instrumental in the development of electromechanical recording and stereo techniques.[br]He obtained a BSc in electrical engineering at Cooper Union for the Advancement of Science and Art, New York, in 1923 and an MSc from Yale University, and he did postgraduate work at Columbia University. Most of the time he was also on the staff of the Bell Telephone Laboratories. The Bell Laboratories and its predecessors had a long tradition in research in speech and hearing, and in a team of researchers under H.C. Harrison, Keller developed a number of definite improvements in electrical pick-ups, gold-sputtering for matrix work and electrical disc recording equipment. From 1931 onwards the team at Bell Labs developed disc recording for moving pictures and entered into collaboration with Leopold Stokowski and the Philadelphia Orchestra concerning transmission and recording of high-fidelity sound over wires, and stereo techniques. Keller developed a stereo recording system for disc records independently of A.D. Blumlein that was used experimentally in the Bell Labs during the 1930s. During the Second World War Keller was in a team developing sonar (sound navigation and ranging) for the US Navy. After the war he concentrated on switching equipment for telephone exchanges and developed a miniature relay. In 1966 he retired from the Bell Laboratories, where he had been Director of several departments, ending as Director of the Switching Apparatus Laboratory. After retirement he was a consultant internationally, concerning electromechanical devices in particular. When, in 1980, the Bell Laboratories decided to issue LP re-recordings of a number of the experimental records made during the 1930s, Keller was brought in from retirement to supervise the project and decide on the selections.[br]BibliographyKeller was inventor or co-inventor of forty patents, including: US patent no. 2,114,471 (the principles of stereo disc recording); US patent no. 2,612,586 (tape guides with air lubrication); US patent no. 3,366,901 (a miniature crossbar switch).Apart from a large number of highly technical papers, Keller also wrote the article "Phonograph" in the 1950 and 1957 editions of Encyclopaedia Britannica.1986, Reflections of a Stereo Pioneer, San Francisco: San Francisco Press (an honest, personal account).GB-N -
59 Ricardo, Sir Harry Ralph
[br]b. 26 January 1885 London, Englandd. 18 May 1974 Graffham, Sussex, England[br]English mechanical engineer; researcher, designer and developer of internal combustion engines.[br]Harry Ricardo was the eldest child and only son of Halsey Ricardo (architect) and Catherine Rendel (daughter of Alexander Rendel, senior partner in the firm of consulting civil engineers that later became Rendel, Palmer and Tritton). He was educated at Rugby School and at Cambridge. While still at school, he designed and made a steam engine to drive his bicycle, and by the time he went up to Cambridge in 1903 he was a skilled craftsman. At Cambridge, he made a motor cycle powered by a petrol engine of his own design, and with this he won a fuel-consumption competition by covering almost 40 miles (64 km) on a quart (1.14 1) of petrol. This brought him to the attention of Professor Bertram Hopkinson, who invited him to help with research on turbulence and pre-ignition in internal combustion engines. After leaving Cambridge in 1907, he joined his grandfather's firm and became head of the design department for mechanical equipment used in civil engineering. In 1916 he was asked to help with the problem of loading tanks on to railway trucks. He was then given the task of designing and organizing the manufacture of engines for tanks, and the success of this enterprise encouraged him to set up his own establishment at Shoreham, devoted to research on, and design and development of, internal combustion engines.Leading on from the work with Hopkinson were his discoveries on the suppression of detonation in spark-ignition engines. He noted that the current paraffinic fuels were more prone to detonation than the aromatics, which were being discarded as they did not comply with the existing specifications because of their high specific gravity. He introduced the concepts of "highest useful compression ratio" (HUCR) and "toluene number" for fuel samples burned in a special variable compression-ratio engine. The toluene number was the proportion of toluene in heptane that gave the same HUCR as the fuel sample. Later, toluene was superseded by iso-octane to give the now familiar octane rating. He went on to improve the combustion in side-valve engines by increasing turbulence, shortening the flame path and minimizing the clearance between piston and head by concentrating the combustion space over the valves. By these means, the compression ratio could be increased to that used by overhead-valve engines before detonation intervened. The very hot poppet valve restricted the advancement of all internal combustion engines, so he turned his attention to eliminating it by use of the single sleeve-valve, this being developed with support from the Air Ministry. By the end of the Second World War some 130,000 such aero-engines had been built by Bristol, Napier and Rolls-Royce before the piston aero-engine was superseded by the gas turbine of Whittle. He even contributed to the success of the latter by developing a fuel control system for it.Concurrent with this was work on the diesel engine. He designed and developed the engine that halved the fuel consumption of London buses. He invented and perfected the "Comet" series of combustion chambers for diesel engines, and the Company was consulted by the vast majority of international internal combustion engine manufacturers. He published and lectured widely and fully deserved his many honours; he was elected FRS in 1929, was President of the Institution of Mechanical Engineers in 1944–5 and was knighted in 1948. This shy and modest, though very determined man was highly regarded by all who came into contact with him. It was said that research into internal combustion engines, his family and boats constituted all that he would wish from life.[br]Principal Honours and DistinctionsKnighted 1948. FRS 1929. President, Institution of Mechanical Engineers 1944–5.Bibliography1968, Memo \& Machines. The Pattern of My Life, London: Constable.Further ReadingSir William Hawthorne, 1976, "Harry Ralph Ricardo", Biographical Memoirs of Fellows of the Royal Society 22.JBBiographical history of technology > Ricardo, Sir Harry Ralph
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60 Tainter, Charles Sumner
SUBJECT AREA: Recording[br]b. 1854d. 1940[br]American scientific instrument maker, co-developer of practical cylinder recording.[br]He manufactured "philosophical devices" in Cambridge, Massachusetts, and was approached by Alexander Graham Bell in connection with the construction of toys using sound recordings. A more formal co-operation was agreed, and after Bell's receipt of the French Volta prize in 1880 he financed the Volta Laboratory Association in Washington, DC. He founded this in 1881 together with a cousin and Tainter to develop a practical sound-recording and -reproducing system. Another area that was developed was the transmission of sound by means of modulated light and reception via a selenium cell.The advances in sound recording and reproduction were very positive, and T.A. Edison was approached in mid-1885 in order to establish co-operation in the further development of a cylinder instrument. In early 1886 the Volta Graphophone Company was incorporated in Virginia, and an experimental laboratory was established in Washington, DC. The investors were connected with the secretarial services at the House of Representatives and needed the development for increasing efficiency in debate reporting. In mid-1887 Edison, against the advice of his collaborators, declined co-operation and went ahead on his own. There is no doubt that Tainter's skill in developing functional equipment and the speed with which he was able to work in the crucial years provoked other developments in the field, in particular the perfection of the Edison phonograph and the development of the disc record by Berliner.[br]BibliographyTainter's patents were numerous; those on sound recording were the most important, because they incorporated so many fundamental ideas, and included US patent no. 341, 214 (with C.A.Bell), and US patent no. 375, 579 (a complete dictation outfit).Further ReadingV.K.Chew, 1981, Talking Machines, London: Science Museum and HMSO, pp. 9–12 (provides a good overview, not only of Tainter's contribution, but also of early sound recording and reproduction).GB-NBiographical history of technology > Tainter, Charles Sumner
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