211,004 research outputs found

    Boundary States and Black Hole Entropy

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    Black hole entropy is derived from a sum over boundary states. The boundary states are labeled by energy and momentum surface densities, and parametrized by the boundary metric. The sum over state labels is expressed as a functional integral with measure determined by the density of states. The sum over metrics is expressed as a functional integral with measure determined by the universal expression for the inverse temperature gradient at the horizon. The analysis applies to any stationary, nonextreme black hole in any theory of gravitational and matter fields.Comment: 4 pages, Revte

    Indometh acin-antihistamine combination for gastric ulceration control

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    An anti-inflammatory and analgesic composition containing indomethacin and an H2 histamine receptor antagonist in an amount sufficient to reduce gastric distress caused by the indomethacin was developed. Usable antagonists are metiamide and cimetidine

    Unimodular graded Poisson Hopf algebras

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    Let AA be a Poisson Hopf algebra over an algebraically closed field of characteristic zero. If AA is finitely generated and connected graded as an algebra and its Poisson bracket is homogeneous of degree d0d \geq 0, then AA is unimodular; that is, the modular derivation of AA is zero. This is a Poisson analogue of a recent result concerning Hopf algebras which are connected graded as algebras.Comment: 14 pages; preliminary version, comments welcom

    Indomethacin-antihistamine combination for gastric ulceration control

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    An anti-inflammatory and analgesic composition containing indomethacin and an H sub 1 or an H sub 2 histamine receptor antagonist in an amount sufficient to reduce gastric distress caused by the indomethacin is described. Usable antagonists include pyrilamine, promethazine, metiamide and cimetidine

    The Cohen Macaulay property for noncommutative rings

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    Let R be a noetherian ring which is a finite module over its centre Z(R). This paper studies the consequences for R of the hypothesis that it is a maximal Cohen Macaulay Z(R)-module. Old results are reviewed and a number of new results are proved. The additional hypothesis of homological grade symmetry is proposed as the appropriate extra lever needed to extend the classical commutative homological hierarchy to this setting, and results are given offering evidence in support of this proposal.Comment: Preliminary version; comments welcom

    The 26^{26}Al Gamma-ray Line from Massive-Star Regions

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    The measurement of gamma rays from the diffuse afterglow of radioactivity originating in massive-star nucleosynthesis is considered a laboratory for testing models, when specific stellar groups are investigated, at known distance and with well-constrained stellar population. Regions which have been exploited for such studies include Cygnus, Carina, Orion, and Scorpius-Centaurus. The Orion region hosts the Orion OB1 association and its subgroups at about 450~pc distance. We report the detection of 26^{26}Al gamma rays from this region with INTEGRAL/SPI.Comment: Contribution to Symposium "Nuclei in the Cosmos XIV", Niigata, Japan, Jun 2016; 3 pages, 2 figures; accepted for publication in JPS (Japan Physical Society) Conference Proceedings http://jpscp.jps.jp
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