923 resultados para Symmetric cipher
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We present the first direct measurements of bidirectional motions in an extragalactic radio jet. The radio source 1946+708 is a compact symmetric object with striking S-symmetry identified with a galaxy at a redshift of 0.101. From observations 2 years apart we have determined the velocities of four compact components in the jet, the fastest of which has an apparent velocity of 1.09 h-1c. By pairing up the components, assuming they were simultaneously ejected in opposite directions, we derive a 1 lower limit on the Hubble constant, H0 > 42 km.s-1.Mpc-1.
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"NSF-OCA-GJ-36936-000008."
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Vita.
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Thesis (M.S.)--University of Illinois.
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"July 30, 1958"
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Mode of access: Internet.
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"Prepared for the Air Force Ballistic Missile Division, Headquarters Air Research and Development Command, under Contract AF 04(647)-309, Advanced Propulsion Systems."
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Mode of access: Internet.
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Mode of access: Internet.
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At head of title: NBS Project 8440-11-84141.
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"Reprinted from the Transactions of the Royal Society of Canada, 3d ser., 1908-1909, v.2, sect.3."
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Mode of access: Internet.
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Title within double ruled border; text within single rule border on every page, with double rule at top and bottom of page. The texts are arranged in six columns, along two pages.
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Thesis (Ph.D.)--University of Washington, 2016-06
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We find necessary and sufficient conditions for completing an arbitrary 2 by n latin rectangle to an n by n symmetric latin square, for completing an arbitrary 2 by n latin rectangle to an n by n unipotent symmetric latin square, and for completing an arbitrary 1 by n latin rectangle to an n by n idempotent symmetric latin square. Equivalently, we prove necessary and sufficient conditions for the existence of an (n - 1)-edge colouring of K-n (n even), and for an n-edge colouring of K-n (n odd) in which the colours assigned to the edges incident with two vertices are specified in advance.