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  • 1
    Publication Date: 2015-12-19
    Description: In the framework of the ITER project, the CEA-SBT has been contracted to supply 277 venturi tube flowmeters to measure the distribution of helium in the superconducting magnets of the ITER tokamak. Six sizes of venturi tube have been designed so as to span a measurable helium flowrate range from 0.1 g/s to 400g/s. They operate, in nominal conditions, either at 4K or at 300K, and in a nuclear and magnetic environment. Due to the cryogenic conditions and the large number of venturi tubes to be supplied, an individual calibration of each venturi tube would be too expensive and time consuming. Studies have been performed to produce a design which will offer high repeatability in manufacture, reduce the geometrical uncertainties and improve the final helium flowrate measurement accuracy. On the instrumentation side, technologies for differential and absolute pressure transducers able to operate in applied magnetic fields need to be identified and validated. The complete helium mass fl...
    Print ISSN: 1757-8981
    Electronic ISSN: 1757-899X
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 2
    Publication Date: 2000-10-13
    Description: The preatmospheric mass of the Tagish Lake meteoroid was about 200,000 kilograms. Its calculated orbit indicates affinity to the Apollo asteroids with a semimajor axis in the middle of the asteroid belt, consistent with a linkage to low-albedo C, D, and P type asteroids. The mineralogy, oxygen isotope, and bulk chemical composition of recovered samples of the Tagish Lake meteorite are intermediate between CM and CI meteorites. These data suggest that the Tagish Lake meteorite may be one of the most primitive solar system materials yet studied.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brown, P G -- Hildebrand, A R -- Zolensky, M E -- Grady, M -- Clayton, R N -- Mayeda, T K -- Tagliaferri, E -- Spalding, R -- MacRae, N D -- Hoffman, E L -- Mittlefehldt, D W -- Wacker, J F -- Bird, J A -- Campbell, M D -- Carpenter, R -- Gingerich, H -- Glatiotis, M -- Greiner, E -- Mazur, M J -- McCausland, P J -- Plotkin, H -- Rubak Mazur, T -- New York, N.Y. -- Science. 2000 Oct 13;290(5490):320-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physics and Astronomy, University of Western Ontario, London, Ontario N6A 3K7, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11030647" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1999-09-18
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clayton, R N -- New York, N.Y. -- Science. 1999 Aug 27;285(5432):1364-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10490412" target="_blank"〉PubMed〈/a〉
    Keywords: Iron Compounds/analysis ; Magnesium Compounds/analysis ; *Meteoroids ; Silicates/analysis ; Sodium Chloride ; Temperature ; *Water
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 2002-04-16
    Description: Eucrites are a class of basaltic meteorites that share common mineralogical, isotopic, and chemical properties and are thought to have been derived from the same parent body, possibly asteroid 4 Vesta. The texture, mineralogy, and noble gas data of the recently recovered meteorite, Northwest Africa (NWA) 011, are similar to those of basaltic eucrites. However, the oxygen isotopic composition of NWA011 is different from that of other eucrites, indicating that NWA011 may be derived from a different parent body. The presence of basaltic meteorites with variable oxygen isotopic composition suggests the occurrence of multiple basaltic meteorite parent bodies, perhaps similar to 4 Vesta, in the early solar system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yamaguchi, Akira -- Clayton, Robert N -- Mayeda, Toshiko K -- Ebihara, Mitsuru -- Oura, Yasuji -- Miura, Yayoi N -- Haramura, Hiroshi -- Misawa, Keiji -- Kojima, Hideyasu -- Nagao, Keisuke -- New York, N.Y. -- Science. 2002 Apr 12;296(5566):334-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Antarctic Meteorite Research Center, National Institute of Polar Research, Tokyo 173-8515, Japan. yamaguch@nipr.ac.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11951042" target="_blank"〉PubMed〈/a〉
    Keywords: Africa ; Cosmic Radiation ; *Meteoroids ; Minerals/*analysis ; *Minor Planets ; Oxygen Isotopes/*analysis ; Silicates/*analysis ; Trace Elements/analysis
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
    Publication Date: 2010-06-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clayton, Nicola -- England -- Nature. 2010 Jun 24;465(7301):989. doi: 10.1038/465989e.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉University of Cambridge, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20577170" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 6
    Publication Date: 2009-11-20
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clayton, Nicky -- England -- Nature. 2009 Nov 19;462(7271):288. doi: 10.1038/462288a.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19924197" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Behavior, Animal ; Birds/*physiology ; *Dancing/physiology/psychology ; Female ; Humans ; Male ; Music/psychology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 7
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1992-03-13
    Description: The Shergotty-Nakhla-Chassigny (SNC) meteorites, purportedly of martian origin, contain 0.04 to 0.4 percent water by weight. Oxygen isotopic analysis can be used to determine whether this water is extraterrestrial or terrestrial. Such analysis reveals that a portion of the water is extraterrestrial and furthermore was not in oxygen isotopic equilibrium with the host rock. Lack of equilibrium between water and host rock implies that the lithosphere and hydrosphere of the SNC parent body formed two distinct oxygen isotopic reservoirs. If Mars was the parent body, the maintenance of two distinct reservoirs may result from the absence of plate tectonics on the planet.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Karlsson, H R -- Clayton, R N -- Gibson, E K Jr -- Mayeda, T K -- New York, N.Y. -- Science. 1992 Mar 13;255:1409-11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Planetary Science Branch, National Aeronautics and Space Administration, Johnson Space Center, Houston, TX 77058.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/11537889" target="_blank"〉PubMed〈/a〉
    Keywords: *Atmosphere ; *Extraterrestrial Environment ; Geological Phenomena ; Geology ; *Mars ; Models, Theoretical ; Oxygen Isotopes ; *Solar System ; Temperature ; Water/*analysis/chemistry
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1992-11-13
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clayton, R N -- New York, N.Y. -- Science. 1992 Nov 13;258(5085):1162-3.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17789088" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2006-09-23
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clayton, Robert N -- New York, N.Y. -- Science. 2006 Sep 22;313(5794):1743-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Enrico Fermi Institute, University of Chicago, Chicago, IL 60637, USA. r-clayton@uchicago.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16990537" target="_blank"〉PubMed〈/a〉
    Keywords: *Evolution, Planetary ; *Meteoroids ; *Minor Planets ; Oxygen Isotopes
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 2011-06-28
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Clayton, Robert N -- New York, N.Y. -- Science. 2011 Jun 24;332(6037):1509-10. doi: 10.1126/science.1206965.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Enrico Fermi Institute, Department of Chemistry and Department of the Geophysical Sciences, University of Chicago, Chicago, IL 60637, USA. r-clayton@uchicago.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21700859" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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