develop+a+unit

SUBJECT AREA: Electronics and information technology, Telecommunications

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Baudot had no formal education beyond his local primary school and began his working life as a farmer, as was his father. However, in September 1869 he joined the French telegraph service and was soon sent on a course on the recently developed Hughes printing telegraph. After service in the Franco-Prussian war as a lieutenant with the military telegraph, he returned to his civilian duties in Paris in 1872. He was there encouraged to develop (in his own time!) a multiple Hughes system for time-multiplexing of several telegraph messages. By using synchronized clockwork-driven rotating switches at the transmitter and receiver he was able to transmit five messages simultaneously; the system was officially adopted by the French Post \& Telegraph Administration five years later. In 1874 he patented the idea of a 5-bit (i.e. 32-permutation) code, with equal on and off intervals, for telegraph transmission of the Roman alphabet and punctuation signs and for control of the typewriter-like teleprinter used to display the message. This code, known as the Baudot code, was found to be more economical than the existing Morse code and was widely adopted for national and international telegraphy in the twentieth century. In the 1970s it was superseded by 7—and 8-bit codes.

Further development of his ideas on multiplexing led in 1894 to methods suitable for high-speed telegraphy. To commemorate his contribution to efficient telegraphy, the unit of signalling speed (i.e. the number of elements transmitted per second) is known as the baud.

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SUBJECT AREA: Electronics and information technology, Telecommunications

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Following graduation from the University of Wisconsin in 1928 and a year of postgraduate study, Jansky joined Bell Telephone Laboratories in New Jersey with the task of establishing the source of interference to telephone communications by radio. To this end he constructed a linear-directional short-wave antenna and eventually, in 1931, he concluded that the interference actually came from the stars, the major source being the constellation Sagittarius in the direction of the centre of the Milky Way. Although he continued to study the propagation of short radio waves and the nature of observed echoes, it was left to others to develop the science of radioastronomy and to use the creation of echoes for radiolocation. Although he received no scientific award for his discovery, Jansky's name is primarily honoured by its use as the unit of stellar radio-emission strength.

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See also: Appleton, Sir Edward Victor

SUBJECT AREA: Paper and printing

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Although reared in a farming community, Lanston was able to develop his mechanical talent. After serving in the American Civil War he secured a clerkship in the Pensions Office in Washington, where he remained for twenty-two years. He studied law in his spare time and was called to the Bar. At the same time, he invented a whole variety of mechanical devices, many of which he patented. Around 1883 Lanston began taking an interest in machines for composing printers' type, probably stimulated by Ottmar Mergenthaler, who was then in Washington and working in this field. Four years' work were rewarded on 7 June 1887 by the grant of a patent, followed by three more, for a machine "to produce justified lines of type". The machine, the Monotype, consisted of two components: first a keyboard unit produced a strip of paper tape with holes punched in patterns corresponding to the characters required; this tape controlled the matrices in the caster, the second and "hot metal" component, from which types were ejected singly and fed to an assembly point until a complete line of type had been formed. Lanston resigned his post and set up the Lanston Type Machine Company in Washington. He laboured for ten years to convert the device defined in his patents into a machine that could be made and used commercially. In 1897 the perfected Monotype appeared. The company was reorganized as the Lanston Monotype Manufacturing Company of Philadelphia, and Lanston devoted himself to promoting and improving the machine. Monotype, with Mergenthaler's Linotype, steadily supplanted hand-setting and the various inadequate mechanical methods that were then in use, and by the 1920s they reigned supreme, until the 1960s, when they themselves began to be superseded by computer-controlled photosetting methods.

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SUBJECT AREA: Electricity

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While at the technical institute in Graz, Austria, Tesla's attention was drawn to the desirability of constructing a motor without a commutator. He considered the sparking between the commutator and brushes of the Gramme machine when run as a motor a serious defect. In 1881 he went to Budapest to work on the telegraph system and while there conceived the principle of the rotating magnetic field, upon which all polyphase induction motors are based. In 1882 Tesla moved to Paris and joined the Continental Edison Company. After building a prototype of his motor he emigrated to the United States in 1884, becoming an American citizen in 1889. He left Edison and founded an independent concern, the Tesla Electric Company, to develop his inventions.

The importance of Tesla's first patents, granted in 1888 for alternating-current machines, cannot be over-emphasized. They covered a complete polyphase system including an alternator and induction motor. Other patents included the polyphase transformer, synchronous motor and the star connection of three-phase machines. These were to become the basis of the whole of the modern electric power industry. The Westinghouse company purchased the patents and marketed Tesla motors, obtaining in 1893 the contract for the Niagara Falls two-phase alternators driven by 5,000 hp (3,700 kW) water turbines.

After a short period with Westinghouse, Tesla resigned to continue his research into high-frequency and high-voltage phenomena using the Tesla coil, an air-cored transformer. He lectured in America and Europe on his high-frequency devices, enjoying a considerable international reputation. The name "tesla" has been given to the SI unit of magnetic-flux density. The induction motor became one of the greatest advances in the industrial application of electricity. A claim for priority of invention of the induction motor was made by protagonists of Galileo Ferraris (1847–1897), whose discovery of rotating magnetic fields produced by alternating currents was made independently of Tesla's. Ferraris demonstrated the phenomenon but neglected its exploitation to produce a practical motor. Tesla himself failed to reap more than a small return on his work and later became more interested in scientific achievement than commercial success, with his patents being infringed on a wide scale.

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жизненный цикл
Период времени от начала проектирования машины и (или) оборудования до завершения утилизации, включающий взаимосвязанные стадии (проектирование, производство, хранение, монтаж, наладка, эксплуатация, в том числе модернизация, ремонт, техническое и сервисное обслуживание).
[Технический регламент о безопасности машин и оборудования]

Параллельные тексты EN-RU

Lennox contribution to counter rising energy costs was to develop BALTIC™ the most efficient rooftop unit designed to provide the best and lowest life cycle cost [Lennox]

Вкладом компании Lennox в борьбу с ростом цен на энергоносители явилась разработка кондиционера BALTIC™ - наиболее эффективного крышного кондиционера, имеющего самый низкий по стоимости и самый продолжительный жизненный цикл. [ Перевод Интент]

Тематики

• безопасность машин и труда в целом

EN

• life cycle
• life-cycle

4.16 жизненный цикл (life cycle): Развитие системы, продукта, услуги, проекта или других изготовленных человеком объектов, начиная со стадии разработки концепции и заканчивая прекращением применения.

Источник: ГОСТ Р ИСО/МЭК 12207-2010: Информационная технология. Системная и программная инженерия. Процессы жизненного цикла программных средств оригинал документа

3.2 жизненный цикл (life cycle): Последовательные или взаимосвязанные стадии системы производства и эксплуатации продукции от приобретения сырья или разработки природных ресурсов до утилизации.

3.3

Источник: ГОСТ Р 14.08-2005: Экологический менеджмент. Порядок установления аспектов окружающей среды в стандартах на продукцию (ИСО/МЭК 64) оригинал документа

3.2 жизненный цикл (Life-cycle): Последовательные и взаимосвязанные стадии продукционной системы - от добычи сырьевых материалов или использования природных ресурсов до размещения (утилизации) отходов (ГОСТ Р ИСО 14040).

Примечание - Понятие «продукция» включает товары или услуги.

Источник: ГОСТ Р ИСО 14020-99: Экологические этикетки и декларации. Основные принципы оригинал документа

3.1.8 жизненный цикл (life cycle): Последовательные и взаимосвязанные стадии существования продукционной системы от приобретения сырьевых материалов или разработки природных ресурсов до утилизации продукции (ГОСТ Р ИСО 14040).

Источник: ГОСТ Р ИСО 14021-2000: Этикетки и декларации экологические. Самодекларируемые экологические заявления (экологическая маркировка по типу II) оригинал документа

3.1 жизненный цикл (life cycle): Последовательные и взаимосвязанные стадии системы жизненного цикла продукции от приобретения или производства из природных ресурсов или сырья до окончательного размещения в окружающей среде.

Источник: ГОСТ Р ИСО 14040-2010: Экологический менеджмент. Оценка жизненного цикла. Принципы и структура оригинал документа

3.1 жизненный цикл (life cycle): Последовательные и взаимосвязанные стадии системы жизненного цикла продукции (58) от приобретения или производства из природных ресурсов или сырья до конечного размещения в окружающей среде (в виде отходов, сбросов и выбросов)

Источник: ГОСТ Р ИСО 14044-2007: Экологический менеджмент. Оценка жизненного цикла. Требования и рекомендации оригинал документа

3.2 жизненный цикл (life-cycle): Последовательные и взаимосвязанные стадии продукционной системы - от добычи сырьевых материалов или использования природных ресурсов до размещения (утилизации)отходов.

Примечание - Понятие «продукция» включает товары или услуги.

Источник: ГОСТ Р ИСО 14020-2011: Этикетки и декларации экологические. Основные принципы оригинал документа

3.42 жизненный цикл (life cycle): Ряд различимых фаз и этапов в пределах фаз, через которые проходит сущность (объект) от ее создания до окончания своего существования.

Источник: ГОСТ Р ИСО 19439-2008: Интеграция предприятия. Основа моделирования предприятия оригинал документа

7.1 жизненный цикл (life cycle): Последовательные и взаимосвязанные стадии системы жизненного цикла продукции (6.1) от приобретения или производства продукции из природных ресурсов, сырья (6.12) до ее конечного размещения в окружающей среде.

[ИСО 14040:2006]

Источник: ГОСТ Р ИСО 14050-2009: Менеджмент окружающей среды. Словарь оригинал документа

3.26 жизненный цикл (life cycle): Набор различимых фаз и этапов в пределах фаз, через которые проходит сущность предприятия от своего создания до прекращения существования.

Источник: ГОСТ Р 54136-2010: Системы промышленной автоматизации и интеграция. Руководство по применению стандартов, структура и словарь оригинал документа

3.19 жизненный цикл (life cycle): Период времени от этапа концепции до этапа распоряжения продукцией.

Источник: ГОСТ Р 51901.3-2007: Менеджмент риска. Руководство по менеджменту надежности оригинал документа