9,752 research outputs found

    The “Demand Side” of Transnational Bribery and Corruption: Why Leveling the Playing Field on the Supply Side Isn’t Enough

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    The domestic and international legal framework for combating bribery and corruption (“ABC laws”), including both private and public corrupt practices that are transnational (cross border) in character, has dramatically expanded over the last twenty years. Despite these developments, major gaps remain. This Article examines one of the largest systemic gaps: the absence of effective tools to control the demand side of transnational bribery and corruption—the corrupt solicitation of a benefit—especially when it involves a public official

    Electrodynamics of superconductors

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    An alternate set of equations to describe the electrodynamics of superconductors at a macroscopic level is proposed. These equations resemble equations originally proposed by the London brothers but later discarded by them. Unlike the conventional London equations the alternate equations are relativistically covariant, and they can be understood as arising from the 'rigidity' of the superfluid wave function in a relativistically covariant microscopic theory. They predict that an internal 'spontaneous' electric field exists in superconductors, and that externally applied electric fields, both longitudinal and transverse, are screened over a London penetration length, as magnetic fields are. The associated longitudinal dielectric function predicts a much steeper plasmon dispersion relation than the conventional theory, and a blue shift of the minimum plasmon frequency for small samples. It is argued that the conventional London equations lead to difficulties that are removed in the present theory, and that the proposed equations do not contradict any known experimental facts. Experimental tests are discussed.Comment: Small changes following referee's and editor's comments; to be published in Phys.Rev.

    Probing New Physics via an Angular Analysis of B --> V1 V2 decays

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    We show that an angular analysis of B --> V1 V2 decays yields numerous tests for new physics in the decay amplitudes. Unlike direct CP asymmetries, many of these new-physics observables are nonzero even if the strong phase differences vanish. For certain observables, neither time-dependent measurements nor tagging is necessary. Should a signal for new physics be found, one can place a lower limit on the size of the new-physics parameters, as well as on their effect on the measurement of the phase of B0--Bbar0 mixing.Comment: 9 pages, plain latex, no figures. Title modified slightly. Paragraph added about viability of method. Conclusions unchanged. To be published in Europhysics Letter

    Vitamin K catabolite inhibition of ovariectomy-induced bone loss: Structure–activity relationship considerations

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    The potential benefit of vitamin K as a therapeutic in osteoporosis is controversial and the vitamin K regimen being used clinically (45 mg/day) employs doses that are many times higher than required to ensure maximal gamma‐carboxylation of the vitamin K‐dependent bone proteins. We therefore tested the hypothesis that vitamin K catabolites, 5‐carbon (CAN5C) and 7‐carbon carboxylic acid (CAN7C) aliphatic side‐chain derivatives of the naphthoquinone moiety exert an osteotrophic role consistent with the treatment of osteoporosis

    The two-fluid model with superfluid entropy

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    The two-fluid model of liquid helium is generalized to the case that the superfluid fraction has a small entropy content. We present theoretical arguments in favour of such a small superfluid entropy. In the generalized two-fluid model various sound modes of He  \;II are investigated. In a superleak carrying a persistent current the superfluid entropy leads to a new sound mode which we call sixth sound. The relation between the sixth sound and the superfluid entropy is discussed in detail.Comment: 22 pages, latex, published in Nuovo Cimento 16 D (1994) 37

    Nonclassical rotational behavior at the vicinity of the lamda point

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    The rotational property of a quantum liquid at the vicinity of the lambda point is examined. In a liquid helium 4 just above the lambda point, under the strong influence of Bose statistics, the coherent many-body wave function grows to an intermediate size between a macroscopic and a microscopic one, which is of a different nature from the thermal fluctuations. It must reflect in the rotational properties such as the moment of inertia. Beginning with the bosons without the condensate, we make a perturbation calculation of its susceptibility with respect to the repulsive interaction, and examine how, with decreasing temperature, the growth of the coherent wave function gradually changes the rotational behavior of a liquid:The moment of inertia slightly decreases just above the lambda point. This means that at the vicinity of the lambda point, the mechanical superfluid density does not always agree with the thermodynamical one.We compare the result to the experiment by Hess and Fairbank. A new interpretation of the shear viscosity just above the lambda point is given from this viewpoint.Comment: 12pages, 5figure

    Extracting Weak Phase Information from B -> V_1 V_2 Decays

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    We describe a new method for extracting weak, CP-violating phase information, with no hadronic uncertainties, from an angular analysis of B -> V_1 V_2 decays, where V_1 and V_2 are vector mesons. The quantity sin⁥2(2ÎČ+Îł)\sin^2 (2\beta + \gamma) can be cleanly obtained from the study of decays such as B_d^0(t) -> D^{*\pm} \rho^\mp, D^{*\pm} a_1^{\mp}, D^{*0} K^{*0}, etc. Similarly, one can use B_s^0(t) -> D_s^{*\pm} K^{*\mp} to extract sin⁥2Îł\sin^2 \gamma. There are no penguin contributions to these decays. It is possible that sin⁥2(2ÎČ+Îł)\sin^2 (2\beta + \gamma) will be the second function of CP phases, after sin⁥2ÎČ\sin 2\beta, to be measured at B-factories.Comment: 4 pages, RevTeX, no figure

    Exploring CP Violation with B_d -> D K_s Decays

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    We (re)examine CP violation in the decays B_d -> D K_s, where D represents D^0, D(bar), or one of their excited states. The quantity sin⁥2(2ÎČ+Îł)\sin^2(2\beta + \gamma) can be extracted from the time-dependent rates for Bd(t)−>Dˉ∗∗0KsB_d(t) -> {\bar D}^{**0} K_s and Bd(t)−>D∗∗0KsB_d(t) -> D^{**0} K_s, where the D∗∗0D^{**0} decays to D(∗)+π−D^{(*)+}\pi^-. If one considers a non-CP-eigenstate hadronic final state to which both D(bar) and D^0 can decay (e.g. K+π−K^+\pi^-), then one can obtain two of the angles of the unitarity triangle from measurements of the time-dependent rates for Bd(t)−>(K+π−)DKsB_d(t) -> (K^+\pi^-)_{D K_s} and Bd(t)−>(K−π+)DKsB_d(t) -> (K^-\pi^+)_{D K_s}. There are no penguin contributions to these decays, so all measurements are theoretically clean.Comment: 15 pages, LaTeX, no figure

    Observables in the Decays of B to Two Vector Mesons

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    In general there are nine observables in the decay of a B meson to two vector mesons defined in terms of polarization correlations of these mesons. Only six of these can be detected via the subsequent decay angular distributions because of parity conservation in those decays. The remaining three require the measurement of the spin polarization of one of the decay products.Comment: 12 pages, no figur

    Vibration and loads in hingeless rotors. Volume 2: Experimental data

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    Descriptions, geometry, and technical data covering three rotor systems are presented. Tables of experimental data gathered during wind tunnel testing of two of the systems are included. Both analyzed experimental data, ready for comparison with theory, and the basic reduced data from which they were obtained are reported
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