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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 Radi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superheterodyne
A superheterodyne receiver, often shortened to superhet, is a type of radio receiver that uses frequency mixing to convert a received signal to a fixed intermediate frequency (IF) which can be more conveniently processed than the original carrier frequency. It was long believed to have been invented by US engineer Edwin Armstrong, but after some controversy the earliest patent for the invention is now credited to French radio engineer and radio manufacturer Lucien Lévy. Virtually all modern radio receivers use the superheterodyne principle; except those software-defined radios using ''direct sampling''. History Heterodyne Early Morse code radio broadcasts were produced using an alternator connected to a spark gap. The output signal was at a carrier frequency defined by the physical construction of the gap, modulated by the alternating current signal from the alternator. Since the output frequency of the alternator was generally in the audible range, this produces an audible a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walter H
Walter may refer to: People * Walter (name), both a surname and a given name * Little Walter, American blues harmonica player Marion Walter Jacobs (1930–1968) * Gunther (wrestler), Austrian professional wrestler and trainer Walter Hahn (born 1987), who previously wrestled as "Walter" * Walter, standard author abbreviation for Thomas Walter (botanist) ( – 1789) Companies * American Chocolate, later called Walter, an American automobile manufactured from 1902 to 1906 * Walter Energy, a metallurgical coal producer for the global steel industry * Walter Aircraft Engines, Czech manufacturer of aero-engines Films and television * ''Walter'' (1982 film), a British television drama film * Walter Vetrivel, a 1993 Tamil crime drama film * ''Walter'' (2014 film), a British television crime drama * ''Walter'' (2015 film), an American comedy-drama film * ''Walter'' (2020 film), an Indian crime drama film * '' W*A*L*T*E*R'', a 1984 pilot for a spin-off of the TV series ''M*A*S*H'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ESPCI Paris Alumni
ESPCI Paris (officially the École supérieure de physique et de chimie industrielles de la Ville de Paris; ''The City of Paris Industrial Physics and Chemistry Higher Educational Institution'') is a prestigious grande école founded in 1882 by the city of Paris, France. It educates undergraduate and graduate students in physics, chemistry and biology and conducts high-level research in those fields. It is ranked as the first French ''École d'Ingénieurs'' in the 2017 Shanghai Ranking. ESPCI Paris is a constituent college of Université PSL and a founding member of the ParisTech (Paris Institute of Technology) alliance. 5 researchers and alumni from ESPCI Paris have been awarded the Nobel Prize: * Pierre and Marie Curie (Physics, 1903), * Marie Curie - second Nobel Prize (Chemistry, 1911), * Frédéric Joliot-Curie (Chemistry, 1935), * Pierre-Gilles de Gennes (Physics, 1991), * Georges Charpak (Physics, 1992). Two thirds of the students enter the School following a competit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1965 Deaths
Events January–February * January 14 – The Prime Minister of Northern Ireland and the Taoiseach of the Republic of Ireland meet for the first time in 43 years. * January 20 ** Lyndon B. Johnson is Second inauguration of Lyndon B. Johnson, sworn in for a full term as President of the United States. ** Indonesian President Sukarno announces the withdrawal of the Indonesian government from the United Nations. * January 30 – The Death and state funeral of Winston Churchill, state funeral of Sir Winston Churchill takes place in London with the largest assembly of dignitaries in the world until the 2005 funeral of Pope John Paul II. * February 4 – Trofim Lysenko is removed from his post as director of the Institute of Genetics at the Russian Academy of Sciences, Academy of Sciences in the Soviet Union. Lysenkoism, Lysenkoist theories are now treated as pseudoscience. * February 12 ** The African and Malagasy Republic, Malagasy Common Organization ('; OCA ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1892 Births
Year 189 ( CLXXXIX) was a common year starting on Wednesday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Silanus and Silanus (or, less frequently, year 942 ''Ab urbe condita''). The denomination 189 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Plague (possibly smallpox) kills as many as 2,000 people per day in Rome. Farmers are unable to harvest their crops, and food shortages bring riots in the city. China * Liu Bian succeeds Emperor Ling, as Chinese emperor of the Han Dynasty. * Dong Zhuo has Liu Bian deposed, and installs Emperor Xian as emperor. * Two thousand eunuchs in the palace are slaughtered in a violent purge in Luoyang, the capital of Han. By topic Arts and sciences * Galen publishes his ''"Treatise on the various temperament ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great powers—forming two opposing military alliances: the Allies of World War II, Allies and the Axis powers. World War II was a total war that directly involved more than 100 million Military personnel, personnel from more than 30 countries. The major participants in the war threw their entire economic, industrial, and scientific capabilities behind the war effort, blurring the distinction between civilian and military resources. Air warfare of World War II, Aircraft played a major role in the conflict, enabling the strategic bombing of population centres and deploying the Atomic bombings of Hiroshima and Nagasaki, only two nuclear weapons ever used in war. World War II was by far the List of wars by death toll, deadliest conflict in hu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean Mermoz
Jean may refer to: People * Jean (female given name) * Jean (male given name) * Jean (surname) Fictional characters * Jean Grey, a Marvel Comics character * Jean Valjean, fictional character in novel ''Les Misérables'' and its adaptations * Jean Pierre Polnareff, a fictional character from ''JoJo's Bizarre Adventure'' Places * Jean, Nevada, USA; a town * Jean, Oregon, USA Entertainment * Jean (dog), a female collie in silent films * "Jean" (song) (1969), by Rod McKuen, also recorded by Oliver * ''Jean Seberg'' (musical), a 1983 musical by Marvin Hamlisch Other uses * JEAN (programming language) * USS ''Jean'' (ID-1308), American cargo ship c. 1918 * Sternwheeler Jean, a 1938 paddleboat of the Willamette River See also *Jehan * * Gene (other) * Jeanne (other) * Jehanne (other) * Jeans (other) * John (other) John is a common English name and surname: * John (given name) * John (surname) John may also refer to: N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Publicis
Publicis Groupe is a French multinational advertising and public relations company. One of the oldest and largest marketing and communications companies in the world by revenue, it is headquartered in Paris. After 1945, the little-known Paris-based advertising agency grew rapidly, becoming the world's fourth-largest agency. It was a leader in promoting France's post- war economic boom, especially the expansion of the advertising industry; it was successful because of its close ties with top officials of the French government, its clever use of symbols to promote itself, and its ability to attract clients from widely diverse growing industries. It is one of the "Big Four" agency companies, alongside WPP, Interpublic and Omnicom. Publicis Groupe S.A. is headed by Arthur Sadoun, and its agencies provide digital and traditional advertising, media services and marketing services (SAMS) to national and multinational clients. History The company was founded by 20 year old Marcel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marcel Bleustein
Marcel Bleustein-Blanchet (21 August 1906 – 11 April 1996) was a French entrepreneur and advertising magnate best known as the founder of Publicis Groupe. He is also credited with inventing radio advertising in France, helped create the first French opinion polls, introduced Édith Piaf to the French public, and fought with the Free French forces during World War II.Marcel Bleustein-Blanchet Dies; Paris Advertising Giant Was 89 ''The New York Times'' (13 April 1996). Retrieved 17 August 2011. Early life Born the youngest of nine, he was the son of Abraham Bleustein, a poor Russian-Jewish used furniture salesman in northern Paris, Marcel Bleustein left school at the age of 12 to help out in the family furnit ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henri De Kérillis
Henri Calloc'h de Kérillis (27 October 1889 – 11 April 1958) was a French aviator, reporter, writer and politician. A hero of World War I, he traveled widely in the 1920s, and wrote several books about his adventures. He became a journalist, then entered politics as an independent Republican. He was right-wing, conservative and profoundly nationalist. He was hostile to the parties that favored appeasement of Germany in the lead-up to World War II, and went into exile rather than be arrested after the armistice of July 1940. At first a strong supporter of Charles de Gaulle and his Free French, he later fell out with de Gaulle too. He spent the last years of his life in voluntary exile in the United States. Early career Henri de Kérillis was born on 27 October 1889 at Vertheuil, Gironde. His parents were rear-Admiral Henri Calloc'h de Kérillis (1856–1940) and Louise Antoinette d'Elbauve (1864–1931). His family background was military, and he was expected to also follow a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hugues Panassié
Hugues Panassié (27 February 1912 in Paris – 8 December 1974 in Montauban) was a French critic, record producer, and impresario of traditional jazz. Career Panassié was born in Paris. When he was fourteen, he was stricken with polio, which limited his extracurricular physical activities. He took up the saxophone and fell in love with jazz in the late 1920s. Panassié was the founding president of the Hot Club de France in 1932. He produced recording sessions in New York featuring Mezz Mezzrow and Tommy Ladnier from November 1938 to January 1939. During World War II, the Germans occupied the northern half of France beginning June 1940. The Nazis regarded jazz as low music — music from an inferior people. Jacques Demêtre, in the 2014 book by Steve Cushing, ''Pioneers of the Blues Revival'', said that people had expected the Germans to ban jazz entirely. But instead, they only banned American jazz and American tunes. Demetre explained that many American standards were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
