Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/George_Wetherill> ?p ?o }
Showing triples 1 to 95 of
95
with 100 triples per page.
- George_Wetherill abstract "George Wetherill (August 12, 1925—July 19, 2006) was the Director Emeritus, Department of Terrestrial Magnetism, Carnegie Institution of Washington, DC, USA.George Wetherill benefited from the G.I. Bill to receive four degrees, the Ph. B. (1948), S.B. (1949), S.M. (1951), and Ph. D., in physics (1953), all from the University of Chicago. He did his thesis research, on the spontaneous fission of uranium, as well as nuclear processes in nature, as an U.S. Atomic Energy Commission Predoctoral Fellow. Upon receiving his Ph. D., Wetherill became a staff member at Carnegie's Department of Terrestrial Magnetism (DTM) in Washington, D.C. There, he joined an interdepartmental group of Carnegie scientists who were working to date the Earth's rocks by geochemical methods involving natural radioactive decay. This involved determining the concentration and isotopic composition of inert gases such as argon, as well as the isotopes of strontium and lead. He originated the concept of the Concordia Diagram for the uranium-lead isotopic system; this diagram became the standard means for determining precise ages of rocks, and of detecting the possibility of metamorphism, and it forms the basis for all high-precision geochronology in rocks dating back to the early history of the Earth. He was also a member of the Carnegie group that accurately determined the decay constants of potassium and rubidium, an effort that has also become fundamental to the measurement of geological time.Wetherill left DTM in 1960 to become a professor of geophysics and geology at the University of California, Los Angeles. There, he served as chairman of the interdepartmental curriculum in geochemistry (1964-1968), and as chairman of the Department of Planetary and Space Sciences (1968-1972). At UCLA, his interests in age-dating techniques expanded to include extraterrestrial material, as he began applying his radiometric chronology techniques to meteorite and lunar samples. At the same time, he began theoretical explorations into the origin of meteorites. His studies concentrated on collisions between objects in the asteroid belt together with resonances between their motions and those of planets. He computed how these events could move material into Earth-crossing orbits to become meteorites or larger Earth-impacting bodies responsible for the devastating impacts that caused mass extinctions of the majority of living species, including the dinosaurs. Later, he, along with scientists elsewhere, proposed that a certain unusual class of meteorites was not asteroidal in origin but instead came from the planet Mars. This was later confirmed by laboratory work elsewhere and is now well accepted.In 1975, Wetherill returned to Carnegie's Department of Terrestrial Magnetism as director. He remained director until 1991, when he became a staff member. At DTM, he began extending his research efforts into questions concerning the origin of the terrestrial planets--Mercury, Venus, Earth, and Mars. He was stimulated by earlier studies by Victor Safronov (O. Yu. Schmidt Institute, Moscow), who showed that as a swarm of planetesimals coagulated into large bodies the swarm could evolve to produce a few terrestrial planets. Wetherill developed a technique to calculate numerically the orbital evolution and accumulation of planetesimal swarms, and he used the technique to reach specific predictions of the physical and orbital properties of terrestrial planets. His results agreed well with present observations.In addition to showing how the inner solar system formed, Wetherill's work provided the basis for a model of a giant-impact origin for the Moon and the core of Mercury. It also led to explanations for the isotopic abundances of present-day planetary atmospheres. Recently, Wetherill has shown that Jupiter plays an important role in the evolution of the Solar System; by ejecting comets from the solar system, it offers a protective presence to the inner planets. Wetherill's theoretical work supports discussions on the origins of the Solar System as well as on extrasolar planets.Wetherill provided leadership in the scientific community by serving on advisory committees for NASA, the National Academy of Sciences, and the National Science Foundation. For 17 years, he was editor of the Annual Review of Earth and Planetary Sciences. He served as president of the Meteoritical Society, the Geochemical Society, the Planetology Section of the American Geophysical Union and the International Association of Geochemistry and Cosmochemistry.Wetherill died at his home in Washington, D.C Wednesday, July 19, 2006 after a long illness.".
- George_Wetherill wikiPageExternalLink researchers.php?id=184.
- George_Wetherill wikiPageExternalLink 135.
- George_Wetherill wikiPageExternalLink wetherill_publ.html.
- George_Wetherill wikiPageExternalLink 00_34AR.html.
- George_Wetherill wikiPageExternalLink 442756a.html.
- George_Wetherill wikiPageExternalLink AR2006072101558.html.
- George_Wetherill wikiPageID "2170476".
- George_Wetherill wikiPageLength "6781".
- George_Wetherill wikiPageOutDegree "57".
- George_Wetherill wikiPageRevisionID "705960263".
- George_Wetherill wikiPageWikiLink American_Astronomical_Society.
- George_Wetherill wikiPageWikiLink American_Geophysical_Union.
- George_Wetherill wikiPageWikiLink Argon.
- George_Wetherill wikiPageWikiLink Asteroid_belt.
- George_Wetherill wikiPageWikiLink Carnegie_Institution_for_Science.
- George_Wetherill wikiPageWikiLink Category:1925_births.
- George_Wetherill wikiPageWikiLink Category:2006_deaths.
- George_Wetherill wikiPageWikiLink Category:American_nuclear_physicists.
- George_Wetherill wikiPageWikiLink Category:American_physicists.
- George_Wetherill wikiPageWikiLink Category:Members_of_the_United_States_National_Academy_of_Sciences.
- George_Wetherill wikiPageWikiLink Category:National_Medal_of_Science_laureates.
- George_Wetherill wikiPageWikiLink Category:University_of_California,_Los_Angeles_faculty.
- George_Wetherill wikiPageWikiLink Comet.
- George_Wetherill wikiPageWikiLink Earth.
- George_Wetherill wikiPageWikiLink Exoplanet.
- George_Wetherill wikiPageWikiLink G.I._Bill.
- George_Wetherill wikiPageWikiLink G._K._Gilbert_Award.
- George_Wetherill wikiPageWikiLink Geochemical_Society.
- George_Wetherill wikiPageWikiLink Geochronology.
- George_Wetherill wikiPageWikiLink Geological_Society_of_America.
- George_Wetherill wikiPageWikiLink Gerard_P._Kuiper_Prize.
- George_Wetherill wikiPageWikiLink Harry_Hammond_Hess.
- George_Wetherill wikiPageWikiLink Henry_Norris_Russell_Lectureship.
- George_Wetherill wikiPageWikiLink Inert_gas.
- George_Wetherill wikiPageWikiLink Isotope.
- George_Wetherill wikiPageWikiLink J._Lawrence_Smith_Medal.
- George_Wetherill wikiPageWikiLink Jupiter.
- George_Wetherill wikiPageWikiLink Lead.
- George_Wetherill wikiPageWikiLink Leonard_Medal.
- George_Wetherill wikiPageWikiLink Mars.
- George_Wetherill wikiPageWikiLink Mercury_(planet).
- George_Wetherill wikiPageWikiLink Metamorphism.
- George_Wetherill wikiPageWikiLink Meteorite.
- George_Wetherill wikiPageWikiLink Meteoritical_Society.
- George_Wetherill wikiPageWikiLink Moon.
- George_Wetherill wikiPageWikiLink NASA.
- George_Wetherill wikiPageWikiLink National_Academy_of_Sciences.
- George_Wetherill wikiPageWikiLink National_Medal_of_Science.
- George_Wetherill wikiPageWikiLink National_Science_Foundation.
- George_Wetherill wikiPageWikiLink Nuclear_fission.
- George_Wetherill wikiPageWikiLink Planetesimal.
- George_Wetherill wikiPageWikiLink Potassium.
- George_Wetherill wikiPageWikiLink Radioactive_decay.
- George_Wetherill wikiPageWikiLink Rubidium.
- George_Wetherill wikiPageWikiLink Solar_System.
- George_Wetherill wikiPageWikiLink Strontium.
- George_Wetherill wikiPageWikiLink United_States_Atomic_Energy_Commission.
- George_Wetherill wikiPageWikiLink University_of_California,_Los_Angeles.
- George_Wetherill wikiPageWikiLink University_of_Chicago.
- George_Wetherill wikiPageWikiLink Uranium.
- George_Wetherill wikiPageWikiLink Venus.
- George_Wetherill wikiPageWikiLink Viktor_Safronov.
- George_Wetherill wikiPageWikiLinkText "George W. Wetherill".
- George_Wetherill wikiPageWikiLinkText "George Wetherill".
- George_Wetherill wikiPageWikiLinkText "Wetherill, George".
- George_Wetherill wikiPageUsesTemplate Template:No_footnotes.
- George_Wetherill subject Category:1925_births.
- George_Wetherill subject Category:2006_deaths.
- George_Wetherill subject Category:American_nuclear_physicists.
- George_Wetherill subject Category:American_physicists.
- George_Wetherill subject Category:Members_of_the_United_States_National_Academy_of_Sciences.
- George_Wetherill subject Category:National_Medal_of_Science_laureates.
- George_Wetherill subject Category:University_of_California,_Los_Angeles_faculty.
- George_Wetherill hypernym Emeritus.
- George_Wetherill type Person.
- George_Wetherill type Scientist.
- George_Wetherill type Member.
- George_Wetherill type Scientist.
- George_Wetherill type Winner.
- George_Wetherill comment "George Wetherill (August 12, 1925—July 19, 2006) was the Director Emeritus, Department of Terrestrial Magnetism, Carnegie Institution of Washington, DC, USA.George Wetherill benefited from the G.I. Bill to receive four degrees, the Ph. B. (1948), S.B. (1949), S.M. (1951), and Ph. D., in physics (1953), all from the University of Chicago. He did his thesis research, on the spontaneous fission of uranium, as well as nuclear processes in nature, as an U.S.".
- George_Wetherill label "George Wetherill".
- George_Wetherill sameAs Q917190.
- George_Wetherill sameAs George_Wetherill.
- George_Wetherill sameAs George_Wetherill.
- George_Wetherill sameAs جرج_وتریل.
- George_Wetherill sameAs George_Wetherill.
- George_Wetherill sameAs George_Wetherill.
- George_Wetherill sameAs ジョージ・ウェザリル.
- George_Wetherill sameAs George_Wetherill.
- George_Wetherill sameAs George_Wetherill.
- George_Wetherill sameAs m.06s2n8.
- George_Wetherill sameAs Q917190.
- George_Wetherill wasDerivedFrom George_Wetherill?oldid=705960263.
- George_Wetherill isPrimaryTopicOf George_Wetherill.