68,987 research outputs found

    Before You Log-On: Incorporating the Free Web in Your Legal Research Strategy

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    In 2006, the American Bar Association (ABA) published its Legal Technology Survey Report, which included a volume on Online Research. In the report, attorneys responded that 91% are conducting at least some of their research online. Though 39% report that they start their research using a fee-based service like Westlaw or Lexis, the report shows that even those who start their research with a fee-based resource eventually get it right-87% of attorneys report using some free online resources at some point over the course of a research project

    Voices of American Law: US Supreme Court Cases Meet the 21st Century

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    reviewing Voices of American Law documentary series(Thomas B. Metzloff & Sarah Wood producers

    Diffractive Interactions: Theory Summary

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    I review various theory issues in diffraction that have been presented and discussed in the working group on diffractive interactions, and a few points concerning the comparison of theory with data.Comment: 9 pages, 3 figures. Talk given at the 7th International Workshop on Deep Inelastic Scattering and QCD (DIS 99), Zeuthen, Germany, 19-23 April 199

    Transversity Distribution Does Not Contribute to Hard Exclusive Electroproduction of Mesons

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    We show that in hard exclusive electroproduction, ep-->eVp, the leading-twist hard-scattering coefficient for the production of a transversely polarized vector meson V vanishes to all orders of perturbation theory. This implies that this process cannot be used to measure the skewed transversity distribution of quarks in a hadron. In contrast, a recent calculation obtained a non-zero value at NLO. We show that this calculation is incorrect because it failed to include the necessary collinear subtractions. Our method of proof also applies to other processes whose hard-scattering coefficients are constrained by chirality and helicity conservation, and thus validates helicity selection rules based on these symmetries.Comment: 5 pages, 3 figures, ReVTe

    Gamma rays from accretion onto rotating black holes

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    Ionized matter falling onto an isolated, rotating black hole will be heated sufficiently that proton-proton collisions will produce mesons, including neutral pions, which decay into gamma rays. For massive (1000 M sub circled dot), black holes, the resulting gamma-ray luminosity may exceed 10 to the 36th power engs/s, with a spectrum peaked near 20 MeV
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