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Radiotechnique
Radiotechnique (RT) was a French electronics company that made radio transmitting and receiving vacuum tubes, and later more advanced components such as integrated circuits and solar panels. At first it was a subsidiary of the French Compagnie générale de la télégraphie sans fil (CSF). Later it became a subsidiary of Philips of the Netherlands. The company expanded after World War II, moving into television and electronics, including photovoltaics and printed circuits, and in 1979 had about 15,000 employees. Later it lost market share, went through various restructurings, was sold in 1998 and went bankrupt in 2002. CSF subsidiary (1919–31) The Compagnie générale de la télégraphie sans fil (CSF) was formed in 1919 as a holding company for the Société française radio-électrique and other subsidiaries in fields related to radio-electricity. Radiotechnique was initially based in Lyon in 1919. The Radiotechnique subsidiary of the CSF was formed in 1919 to research and de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compagnie Générale De La Télégraphie Sans Fil
The Compagnie générale de la télégraphie sans fil (CSF: General Wireless Telegraphy Company) was a French company founded in 1918 during a reorganization and expansion of the Société française radio-électrique (SFR), which became a subsidiary. The company developed technology for radio-telegraphy, radio program Radio transmission, transmission, radar, television and other applications. It provided broadcasting and telegraphy services, and sold its equipment throughout the French colonial empire and in many other parts of the world. In 1968 CSF merged with the Thomson-Brandt to form Thomson-CSF. Background From the mid-19th century the world was connected with an increasingly dense network of telegraph wires and submarine cables. In 1887 Heinrich Hertz of Germany conclusively proved the existence of electromagnetic waves. Alexander Stepanovich Popov of Russia developed antennas to transmit and receive radio waves. Scientists such as Édouard Branly and Nikola Tesla also con ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
City
A city is a human settlement of a substantial size. The term "city" has different meanings around the world and in some places the settlement can be very small. Even where the term is limited to larger settlements, there is no universally agreed definition of the lower boundary for their size. In a narrower sense, a city can be defined as a permanent and Urban density, densely populated place with administratively defined boundaries whose members work primarily on non-agricultural tasks. Cities generally have extensive systems for housing, transportation, sanitation, Public utilities, utilities, land use, Manufacturing, production of goods, and communication. Their density facilitates interaction between people, government organisations, government organizations, and businesses, sometimes benefiting different parties in the process, such as improving the efficiency of goods and service distribution. Historically, city dwellers have been a small proportion of humanity overall, bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Évreux
Évreux () is a commune in and the capital of the department of Eure, in the French region of Normandy. History Antiquity In late Antiquity, the town, attested in the fourth century AD, was named '' Mediolanum Aulercorum'', "the central town of the Aulerci", the Gallic tribe then inhabiting the area. Mediolanum was a small regional centre of the Roman province of Gallia Lugdunensis. Julius Caesar wintered eight legions in this area after his third campaigning season in the battle for Gaul (56-55 BC): Legiones VII, VIII, IX, X, XI, XII, XIII and XIV. Middle Ages The first known members of the family of the counts of Évreux were descended from an illegitimate son of Richard I, duke of Normandy. These counts became extinct in the male line with the death of Count William in 1118 AD. The county passed by right of Agnes, William's sister and wife of Simon I de Montfort (died 1087 AD) to the house of the lords of Montfort-l'Amaury. Amaury VI de Montfort-Évreux ceded the t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Texas Instruments
Texas Instruments Incorporated (TI) is an American multinational semiconductor company headquartered in Dallas, Texas. It is one of the top 10 semiconductor companies worldwide based on sales volume. The company's focus is on developing analog chips and embedded processors, which account for more than 80% of its revenue. TI also produces digital light processing (DLP) technology and education technology products including calculators, microcontrollers, and multi-core processors. Texas Instruments emerged in 1951 after a reorganization of Geophysical Service Incorporated, a company founded in 1930 that manufactured equipment for use in the seismic industry, as well as defense electronics. TI produced the world's first commercial silicon transistor in 1954, and the same year designed and manufactured the first transistor radio. Jack Kilby invented the integrated circuit in 1958 while working at TI's Central Research Labs. TI also invented the hand-held calculator in 1967, and intr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Groupe Bull
Bull SAS (also known as Groupe Bull, Bull Information Systems, or simply Bull) is a French computer company headquartered in Les Clayes-sous-Bois, in the western suburbs of Paris. The company has also been known at various times as Bull General Electric, Honeywell Bull, CII Honeywell Bull, and Bull HN. Bull was founded in 1931, as H.W. Egli - Bull, to capitalize on the punched card technology patents of Norwegian engineer Fredrik Rosing Bull (1882–1925). After a reorganization in 1933, with new investors coming in, the name was changed to Compagnie des Machines Bull (CMB). Bull has a worldwide presence in more than 100 countries and is particularly active in the defense, finance, health care, manufacturing, public, and telecommunication sectors. History Origins On 31 July 1919, Norwegian engineer Fredrik Rosing Bull filed a patent for a "combined sorter-recorder-tabulator of punch cards" machine that he had developed with financing from the Norwegian insurance comp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sylvania Electric Products
Sylvania Electric Products Inc. was an American manufacturer of diverse electrical equipment, including at various times radio transceivers, vacuum tubes, semiconductors, and mainframe computers such as MOBIDIC. They were one of the companies involved in the development of the COBOL programming language. History The ''Hygrade Sylvania Corporation'' was formed when '' NILCO'', ''Sylvania'' and '' Hygrade Lamp Company'' merged into one company in 1931. In 1939, Hygrade Sylvania started preliminary research on fluorescent technology, and later that year, demonstrated the first linear, or tubular, fluorescent lamp. It was featured at the 1939 New York World's Fair. Sylvania was also a manufacturer of both vacuum tubes and transistors. In 1942, the company changed its name to Sylvania Electric Products Inc. During World War II, Sylvania was chosen from among several competing companies to manufacture the miniature vacuum tubes used in proximity fuze shells due to its quality s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photovoltaics
Photovoltaics (PV) is the conversion of light into electricity using semiconducting materials that exhibit the photovoltaic effect, a phenomenon studied in physics, photochemistry, and electrochemistry. The photovoltaic effect is commercially used for electricity generation and as photosensors. A photovoltaic system employs solar modules, each comprising a number of solar cells, which generate electrical power. PV installations may be ground-mounted, rooftop-mounted, wall-mounted or floating. The mount may be fixed or use a solar tracker to follow the sun across the sky. Photovoltaic technology helps to mitigate climate change because it emits much less carbon dioxide than fossil fuels. Solar PV has specific advantages as an energy source: once installed, its operation does not generate any pollution or any greenhouse gas emissions; it shows scalability in respect of power needs and silicon has large availability in the Earth's crust, although other materials required ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photomultiplier
A photomultiplier is a device that converts incident photons into an electrical signal. Kinds of photomultiplier include: * Photomultiplier tube, a vacuum tube converting incident photons into an electric signal. Photomultiplier tubes (PMTs for short) are members of the class of vacuum tubes, and more specifically vacuum phototubes, which are extremely sensitive detectors of light in the ultraviolet, visible, and near-infrared ranges of the electromagnetic spectrum. ** Magnetic photomultiplier, developed by the Soviets in the 1930s. ** Electrostatic photomultiplier, a kind of photomultiplier tube demonstrated by Jan Rajchman of RCA Laboratories in Princeton, NJ in the late 1930s which became the standard for all future commercial photomultipliers. The first mass-produced photomultiplier, the Type 931, was of this design and is still commercially produced today. * Silicon photomultiplier, a solid-state device converting incident photons into an electric signal. Silicon photomul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomson-CSF
Thomson-CSF was a French company that specialized in the development and manufacture of electronics with a heavy focus upon the aerospace and defence sectors of the market. Thomson-CSF was formed in 1968 following the merger of Thomson-Houston-Hotchkiss-Brandt with the Compagnie Générale de Télégraphie Sans Fil (''General Wireless Telegraphy Company'', commonly abbreviated as ''CSF''), these two companies being the source of the name ''Thomson-CSF''. It operated as an electronics specialist on products such as broadcasting equipment, electroacoustics, shortwave radio sets, radar systems and television. During the 1970s, it began manufacturing backend telephony equipment, semiconductors and medical imaging apparatus. It also entered into large deals outside of the domestic market, acquiring considerable business in the Middle East. During the late 1980s, Thomson-CSF, anticipating defence spending cutbacks, conducted a radical business restructuring, merging its semicon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joué-lès-Tours
Joué-lès-Tours (, literally ''Joué near Tours'') is a commune in the department of Indre-et-Loire, Centre-Val de Loire, central France. It is the largest suburb of the city of Tours, and is adjacent to it on the southwest. Population Toponymy The name of Joué-lès-Tours appears in its form "Gaudiacus" in the 6th Century. It corresponds to a toponymic type frequently found in Christian Gaule, that gave different variants depending on the region: Joué (west of France), Jouy (center and north), Jouey (east), Gouy (Normandy/Picardy), Gaugeac, Jaujac (south). It is composed of the Christian name "Gaudius", meaning "fortunate", "blessed" (gaudia > joy, in Latin) and with the Gallo-Roman suffix -ACU, meaning "place of", "property of". History Joué-lès-Tours was the site of the 20 December 2014 Tours police station stabbing. Controversy In February 2010 the mayor, Philippe Le Breton, added the word ''laïcité'' underneath the French national motto on the town hall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
