|
Gustave-Auguste Ferrié
Gustave-Auguste Ferrié (19 November 1868 – 16 February 1932) was a French radio pioneer and army general.Gustave-Auguste Ferrié Encyclopaedia Britannica Biography Early years Ferrié was born in Saint-Michel-de-Maurienne, . After having studied in the southern city of , receiving the Claude Gay Prize, and graduating from the[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint-Michel-de-Maurienne
Saint-Michel-de-Maurienne (, literally ''Saint-Michel of Maurienne''; frp, Sin Mestyé) is a commune in the Savoie department in the Auvergne-Rhône-Alpes region in south-eastern France. Geography Climate Saint-Michel-de-Maurienne has a oceanic climate (Köppen climate classification ''Cfb''). The station is located at an altitude of ; due to its location on a leeward slope, there is significantly less precipitation than nearby areas. It is quite common to exceed in summer, sometimes the maximum temperature can reach , and in winter it is relatively rare to fall below . The average annual temperature in Saint-Michel-de-Maurienne is . The average annual rainfall is with December as the wettest month. The temperatures are highest on average in July, at around , and lowest in January, at around . The highest temperature ever recorded in Saint-Michel-de-Maurienne was on 19 August 2012; the coldest temperature ever recorded was on 5 February 2012. See also *Communes of the S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michael I
Michael I may refer to: * Pope Michael I of Alexandria, Coptic Pope of Alexandria and Patriarch of the See of St. Mark in 743–767 * Michael I Rhangabes, Byzantine Emperor (died in 844) * Michael I Cerularius, Patriarch Michael I of Constantinople (c. 1000–1059) * Michael I of Duklja, Prince and King of Duklja and (d. 1081) * Mikhail of Vladimir (died in 1176) * Michael I Komnenos Doukas (died in 1215) * Michael I of Russia (1596–1645) * Michael I of Poland (Michał Korybut Wiśniowiecki), King of Poland and Grand Duke of Lithuania (1640-1673) * Michael of Portugal (1802–1866) * Michael I of Serbia (1823–1868) * Michael Cseszneky de Milvany, Michael I of Macedonia (1910–1975) * Michael I of Romania (1921–2017) * Michael I, regnal name of conclavist antipope David Bawden (born 1959) See also * Michael (other) Michael may refer to: People * Michael (given name), a given name * Michael (surname), including a list of people with the surname Michael Given na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxford University
Oxford () is a city in England. It is the county town and only city of Oxfordshire. In 2020, its population was estimated at 151,584. It is north-west of London, south-east of Birmingham and north-east of Bristol. The city is home to the University of Oxford, the oldest university in the English-speaking world; it has buildings in every style of English architecture since late Anglo-Saxon. Oxford's industries include motor manufacturing, education, publishing, information technology and science. History The history of Oxford in England dates back to its original settlement in the Saxon period. Originally of strategic significance due to its controlling location on the upper reaches of the River Thames at its junction with the River Cherwell, the town grew in national importance during the early Norman period, and in the late 12th century became home to the fledgling University of Oxford. The city was besieged during The Anarchy in 1142. The university rose to domina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Institute Of Radio Engineers
The Institute of Radio Engineers (IRE) was a professional organization which existed from 1912 until December 31, 1962. On January 1, 1963, it merged with the American Institute of Electrical Engineers (AIEE) to form the Institute of Electrical and Electronics Engineers (IEEE). Founding Following several attempts to form a technical organization of wireless practitioners in 1908–1912, the Institute of Radio Engineers (IRE) was finally established in 1912 in New York City. Among its founding organizations were the Society of Wireless Telegraph Engineers (SWTE) and the Wireless Institute (TWI). At the time, the dominant organization of electrical engineers was the American Institute of Electrical Engineers (AIEE). Many of the founding members of IRE considered AIEE too conservative and too focused on electric power. Moreover, the founders of the IRE sought to establish an international organization (unlike the “American” AIEE), and adopted a tradition of electing some of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lucien Lévy
Lucien Lévy (11 March 1892 – 24 May 1965) was a French radio engineer and radio receiver manufacturer. He invented the superheterodyne method of amplifying radio signals, used in almost all AM radio receivers. His patent claim was at first disallowed in the United States in favour of the American Edwin Howard Armstrong, but on appeal Lévy's claim as inventor was accepted in the US. Early years Lucien Lévy was born in Paris on 11 March 1892. He attended school in Paris at the Collège Rollin, then the Collège Chaptal. He obtained his diploma as an engineer from the École supérieure de physique et de chimie industrielles de Paris. World War I During World War I (1914–18) Lévy was assigned to Colonel Gustave-Auguste Ferrié as sapper-telegraphist. Captain Paul Brenot headed the second group of the Military Telegraphic Service. Members of the group included Henri Abraham, Maurice de Broglie, Paul Laüt and Lucien Lévy. He was made head of the Eiffel Tower Military Radio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maurice De Broglie
__NOTOC__ Louis-César-Victor-Maurice, 6th duc de Broglie (27 April 1875 – 14 July 1960) was a French physicist. Brother of the theoretical physicist, Louis de Broglie. Biography Early years De Broglie was born in Paris, to Victor de Broglie and Pauline de La Forest d'Armaillé (1851–1928). Pauline's parents were Louis de La Forest d'Armaillé, Comte d'Armaillé and Marie Célestine Amélie d'Armaillé, the writer. In 1901, he was married to Camille Bernou de Rochetaillée (1888–1966) in Paris. They had one daughter, Laure, born on 17 November 1904, who died, aged six, on 12 June 1911. He acceded to the title of duc de Broglie on his father's death in 1906. He died on 14 July 1960 in Neuilly-sur-Seine. His only child having died almost a half-century before, his brother Louis succeeded him as duke. Having graduated from naval officer's school, Maurice de Broglie spent nine years in the French Navy, serving on a gunboat at Bizerte and in the Mediterranean Squadron. Whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henri Abraham
Henri Abraham (1868–1943) was a French physicist who made important contributions to the science of radio waves. He performed some of the first measurements of the propagation velocity of radio waves, helped develop France's first triode vacuum tube, and with Eugene Bloch invented the astable multivibrator. Life Henri Abraham was born July 12, 1868 in the 1st arrondissement of Paris. After brilliant studies at Chaptal secondary school, from 1886 to 1889 he pursued scientific graduate studies at the École Normale Supérieure, where he attended the lectures of physics professors Jules Violle and Marcel Brillouin, and the Faculty of Paris, where he studied physics with Gabriel Lippmann and Edmond Bouty and obtained degrees in physical sciences and in mathematical sciences. He was then appointed for one year preparer physics laboratory of the École Normale Supérieure, then led by Jules Violle, where he wrote his thesis for the doctorate in physical sciences: "New determina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paul Brenot
Paul Brenot (19 September 1880 – 19 August 1967) was a French engineer and industrialist who was active in the development of radio in France. He was an advocate of free enterprise and had corporatist opinions. He was criticized after World War II for working too closely with the German occupiers of France. Life Early years (1880–1918) Paul Brenot was born in Ruoms, Ardèche, on 19 September 1880. He joined the École Polytechnique in 1899. He graduated as an engineer, and from 1904 to 1919 collaborated with General Gustave-Auguste Ferrié in creating military radiotelegraphy. He was an important contributor to development of the Société française radio-électrique (SFR: French Radio Telephone Company) created in 1910 by Joseph Bethenod and Émile Girardeau. In 1910 Brenot was a pioneer in mounting a SFR radio set on a Blériot XI airplane. He was head of the wireless telegraphy (TSF: ''télégraphie sans fil'') service in the Ministry of Colonies from 1911 to 1919. Duri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Triode
A triode is an electronic amplifying vacuum tube (or ''valve'' in British English) consisting of three electrodes inside an evacuated glass envelope: a heated filament or cathode, a grid, and a plate (anode). Developed from Lee De Forest's 1906 Audion, a partial vacuum tube that added a grid electrode to the thermionic diode (Fleming valve), the triode was the first practical electronic amplifier and the ancestor of other types of vacuum tubes such as the tetrode and pentode. Its invention founded the electronics age, making possible amplified radio technology and long-distance telephony. Triodes were widely used in consumer electronics devices such as radios and televisions until the 1970s, when transistors replaced them. Today, their main remaining use is in high-power RF amplifiers in radio transmitters and industrial RF heating devices. In recent years there has been a resurgence in demand for low power triodes due to renewed interest in tube-type audio systems by audiophi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amplifier
An amplifier, electronic amplifier or (informally) amp is an electronic device that can increase the magnitude of a signal (a time-varying voltage or current). It may increase the power significantly, or its main effect may be to boost the voltage or current (power, voltage or current amplifier). It is a two-port electronic circuit that uses electric power from a power supply to increase the amplitude of a signal applied to its input terminals, producing a greater amplitude signal at its output. The ratio of output to input voltage, current, or power is termed gain (voltage, current, or power gain). An amplifier, by definition has gain greater than unity (if the gain is less than unity, the device is an attenuator). An amplifier can either be a separate piece of equipment or an electrical circuit contained within another device. Amplification is fundamental to modern electronics, and amplifiers are widely used in almost all electronic equipment. Amplifiers can be categorize ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Receiver
In radio communications, a radio receiver, also known as a receiver, a wireless, or simply a radio, is an electronic device that receives radio waves and converts the information carried by them to a usable form. It is used with an antenna. The antenna intercepts radio waves (electromagnetic waves of radio frequency) and converts them to tiny alternating currents which are applied to the receiver, and the receiver extracts the desired information. The receiver uses electronic filters to separate the desired radio frequency signal from all the other signals picked up by the antenna, an electronic amplifier to increase the power of the signal for further processing, and finally recovers the desired information through demodulation. Radio receivers are essential components of all systems that use radio. The information produced by the receiver may be in the form of sound, video (television), or digital data. A radio receiver may be a separate piece of electronic equipment, or an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vacuum Tube
A vacuum tube, electron tube, valve (British usage), or tube (North America), is a device that controls electric current flow in a high vacuum between electrodes to which an electric voltage, potential difference has been applied. The type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a hot cathode for fundamental electronic functions such as signal amplifier, amplification and current rectifier, rectification. Non-thermionic types such as a vacuum phototube, however, achieve electron emission through the photoelectric effect, and are used for such purposes as the detection of light intensities. In both types, the electrons are accelerated from the cathode to the anode by the electric field in the tube. The simplest vacuum tube, the diode (i.e. Fleming valve), invented in 1904 by John Ambrose Fleming, contains only a heated electron-emitting cathode and an anode. Electrons can only flow in one direction through the device—fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
