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روبرت إف كريستي (بالإنجليزية: Robert F. Ch … روبرت إف كريستي (بالإنجليزية: Robert F. Christy ) (و. 1916 – 2012 م) هو فيزيائي، وعالم فلك، وعالم فيزياء فلكية، وأستاذ جامعي من كندا . ولد في فانكوفر . شارك في مشروع مانهاتن .وكان عضواً في الأكاديمية الوطنية للعلوم، والأكاديمية الأمريكية للفنون والعلوم .توفي في باسادينا، كاليفورنيا، عن عمر يناهز 96 عاماً.سادينا، كاليفورنيا، عن عمر يناهز 96 عاماً.
, Robert Frederick Christy (Vancouver, 14 de … Robert Frederick Christy (Vancouver, 14 de maio de 1916 — Pasadena, 3 de outubro de 2012) foi um físico teórico e depois astrofísico canadense-estadunidense, uma das últimas pessoas sobreviventes que trabalharam no Projeto Manhattan durante a Segunda Guerra Mundial. Foi por pouco tempo presidente do Instituto de Tecnologia da Califórnia. Graduado pela Universidade da Colúmbia Britânica na década de 1930, onde estudou física, acompanhou George Volkoff, que tinha um ano a mais de estudos que ele, para a Universidade da Califórnia em Berkeley, onde foi admitido como estudante de doutorado por Robert Oppenheimer, o líder dos físicos teóricos dos estados Unidos na época. Obteve um doutorado em 1941 e começou a trabalhar no Departamento de Física do Instituto de Tecnologia de Illinois.ca do Instituto de Tecnologia de Illinois.
, Robert Frederick Christy (14. května 1916 … Robert Frederick Christy (14. května 1916 Vancouver – 3. října 2012 Pasadena) byl kanadsko-americký teoretický fyzik, který se podílel na projektu Manhattan. Rovněž byl prezidentem Kalifornského technologického institutu. Vystduoval univerzitu Britské Kolumbie, kde ve 30. letech získal titul z fyziky a následoval o rok staršího George Volkoffa na Kalifornskou univerzitu v Berkeley, kde se stal postdoktorandem u Roberta Oppenheimera, tehdy předního teoretického fyzika. V roce 1941 získal doktorát a následně odešel na Illinois Institute of Technology. V roce 1942 vstoupil do projektu Manhattan na Chicagské univerzitě, kde se společně s Enrico Fermim pokoušel vyrobit první funkční jaderný reaktor. Když Oppenheimer vytvořil laboratoř projektu Manhattan v Los Alamos, Christy byl jedním z prvních členů teoretické skupiny. Zde objevil mimo jiné to, že pevné podkritické množství plutonia by mohlo být výbušně stlačeno na nadkritické, což bylo velké zjednodušení oproti předchozím koncepcím vyžadujícím model duté skořápky. Po válce se Christy krátce připojil k Chicagské univerzitě, ale již v roce 1946 odešel na Kalifornský technologický institut, když se Oppenheimer rozhodl nepokračovat v akademické činnosti. Christy na Caltechu zůstal a postupně se stal vedoucím katedry a úřadujícím prezidentem. V roce 1960 se začal zajímat o astrofyziku, když vytvořil jedny z prvních výpočetních modelů fungování hvězd. V 80. a 90. letech se věnoval dozimetrii a snažil se lépe pochopit účinky ionizujícího záření. lépe pochopit účinky ionizujícího záření.
, Robert Frédéric Christy (né le 14 mai 1916 à Vancouver et mort le 3 octobre 2012 à Pasadena) est un physicien et astrophysicien canadien.
, Robert Frederick Christy (May 14, 1916 – O … Robert Frederick Christy (May 14, 1916 – October 3, 2012) was a Canadian-American theoretical physicist and later astrophysicist who was one of the last surviving people to have worked on the Manhattan Project during World War II. He briefly served as acting president of California Institute of Technology (Caltech). A graduate of the University of British Columbia (UBC) in the 1930s where he studied physics, he followed George Volkoff, who was a year ahead of him, to the University of California, Berkeley, where he was accepted as a graduate student by Robert Oppenheimer, the leading theoretical physicist in the United States at that time. Christy received his doctorate in 1941 and joined the physics department of Illinois Institute of Technology. In 1942 he joined the Manhattan Project at the University of Chicago, where he was recruited by Enrico Fermi to join the effort to build the first nuclear reactor, having been recommended as a theory resource by Oppenheimer. When Oppenheimer formed the Manhattan Project's Los Alamos Laboratory in 1943, Christy was one of the early recruits to join the Theory Group. Christy is generally credited with the insight that a solid sub-critical mass of plutonium could be explosively compressed into supercriticality, a great simplification of earlier concepts of implosion requiring hollow shells. For this insight the solid-core plutonium model is often referred to as the "Christy pit". After the war, Christy briefly joined the University of Chicago Physics department before being recruited to join the Caltech faculty in 1946 when Oppenheimer decided it was not practical for him to resume his academic activities. He stayed at Caltech for his academic career, serving as Department Chair, Provost and Acting President. In 1960 Christy turned his attention to astrophysics, creating some of the first practical computation models of stellar operation. For this work Christy was awarded the Eddington Medal of the Royal Astronomical Society in 1967. In the 1980s and 1990s Christy participated in the National Research Council's Committee on Dosimetry, an extended effort to better understand the actual radiation exposure due to the bombs dropped on Japan, and on the basis of that learning, better understand the medical risks of radiation exposure.d the medical risks of radiation exposure.
, Роберт Фредерик Кристи (англ. Robert Frede … Роберт Фредерик Кристи (англ. Robert Frederick Christy; 14 мая 1916, Ванкувер, Канада — 3 октября 2012, Пасадина, Калифорния, США) — американский физик-теоретик, участвовавший в Манхэттенском проекте, астроном, президент Калифорнийского технологического института (в 1977—1978 годах). Член Национальной академии наук США (1965), член Американского физического общества (1946).Американского физического общества (1946).
, Robert Frederick Christy (* 14. Mai 1916 in Vancouver, Kanada; † 3. Oktober 2012 in Pasadena, Kalifornien, Vereinigte Staaten) war ein US-amerikanischer Physiker.
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Роберт Фредерик Кристи (англ. Robert Frede … Роберт Фредерик Кристи (англ. Robert Frederick Christy; 14 мая 1916, Ванкувер, Канада — 3 октября 2012, Пасадина, Калифорния, США) — американский физик-теоретик, участвовавший в Манхэттенском проекте, астроном, президент Калифорнийского технологического института (в 1977—1978 годах). Член Национальной академии наук США (1965), член Американского физического общества (1946).Американского физического общества (1946).
, Robert Frederick Christy (Vancouver, 14 de … Robert Frederick Christy (Vancouver, 14 de maio de 1916 — Pasadena, 3 de outubro de 2012) foi um físico teórico e depois astrofísico canadense-estadunidense, uma das últimas pessoas sobreviventes que trabalharam no Projeto Manhattan durante a Segunda Guerra Mundial. Foi por pouco tempo presidente do Instituto de Tecnologia da Califórnia. do Instituto de Tecnologia da Califórnia.
, Robert Frederick Christy (May 14, 1916 – O … Robert Frederick Christy (May 14, 1916 – October 3, 2012) was a Canadian-American theoretical physicist and later astrophysicist who was one of the last surviving people to have worked on the Manhattan Project during World War II. He briefly served as acting president of California Institute of Technology (Caltech).ifornia Institute of Technology (Caltech).
, Robert Frederick Christy (* 14. Mai 1916 in Vancouver, Kanada; † 3. Oktober 2012 in Pasadena, Kalifornien, Vereinigte Staaten) war ein US-amerikanischer Physiker.
, روبرت إف كريستي (بالإنجليزية: Robert F. Ch … روبرت إف كريستي (بالإنجليزية: Robert F. Christy ) (و. 1916 – 2012 م) هو فيزيائي، وعالم فلك، وعالم فيزياء فلكية، وأستاذ جامعي من كندا . ولد في فانكوفر . شارك في مشروع مانهاتن .وكان عضواً في الأكاديمية الوطنية للعلوم، والأكاديمية الأمريكية للفنون والعلوم .توفي في باسادينا، كاليفورنيا، عن عمر يناهز 96 عاماً.سادينا، كاليفورنيا، عن عمر يناهز 96 عاماً.
, Robert Frédéric Christy (né le 14 mai 1916 à Vancouver et mort le 3 octobre 2012 à Pasadena) est un physicien et astrophysicien canadien.
, Robert Frederick Christy (14. května 1916 … Robert Frederick Christy (14. května 1916 Vancouver – 3. října 2012 Pasadena) byl kanadsko-americký teoretický fyzik, který se podílel na projektu Manhattan. Rovněž byl prezidentem Kalifornského technologického institutu. Vystduoval univerzitu Britské Kolumbie, kde ve 30. letech získal titul z fyziky a následoval o rok staršího George Volkoffa na Kalifornskou univerzitu v Berkeley, kde se stal postdoktorandem u Roberta Oppenheimera, tehdy předního teoretického fyzika. V roce 1941 získal doktorát a následně odešel na Illinois Institute of Technology.dešel na Illinois Institute of Technology.
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| rdfs:label |
Robert Christy
, Robert F. Christy
, Кристи, Роберт
, Robert Frederick Christy
, روبرت إف كريستي
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