9,910 research outputs found

    Xe 4d photoionization in Xe@C60, Xe@C240, and Xe@C60@C240

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    Re-evaluated parameters for the square-well potential model for photoionization of endo-fullerenes are proposed and employed to reveal the spectacular modifications in the Xe 4d photoionization giant resonance along the path from Xe@C60 to Xe@C240 to multi-walled Xe@[email protected]: 1 page, 1 figure. 2011 International Conference on Photonic, Electronic, and Atomic Collisions (Belfast, UK, 2011), abstract Tue13

    Nodal domain distributions for quantum maps

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    The statistics of the nodal lines and nodal domains of the eigenfunctions of quantum billiards have recently been observed to be fingerprints of the chaoticity of the underlying classical motion by Blum et al. (Phys. Rev. Lett., Vol. 88 (2002), 114101) and by Bogomolny and Schmit (Phys. Rev. Lett., Vol. 88 (2002), 114102). These statistics were shown to be computable from the random wave model of the eigenfunctions. We here study the analogous problem for chaotic maps whose phase space is the two-torus. We show that the distributions of the numbers of nodal points and nodal domains of the eigenvectors of the corresponding quantum maps can be computed straightforwardly and exactly using random matrix theory. We compare the predictions with the results of numerical computations involving quantum perturbed cat maps.Comment: 7 pages, 2 figures. Second version: minor correction

    Misreporting Fundraising: How do Nonprofit Organizations Account for Telemarketing Campaigns?

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    The purpose of this study is to examine the frequency, determinants and implications of misreporting fundraising activities. We compare state telemarketing campaign reports with the associated information from nonprofits annual Form 990 filings to directly test nonprofits revenue and expense recognition policies. Our study indicates that smaller nonprofits, and those with less accounting sophistication, are more likely to inappropriately report telemarketing costs as a component of net revenues rather than as expenses. In addition, less monitored firms are more likely to report telemarketing campaign revenues net of expenses. Additionally, among those firms that do report telemarketing costs as expenses, we find that smaller firms, and those with relatively less officer compensation, are more likely to allocate telemarketing expenses to non-fundraising expense categories.This publication is Hauser Center Working Paper No. 37. The Hauser Center Working Paper Series was launched during the summer of 2000. The Series enables the Hauser Center to share with a broad audience important works-in-progress written by Hauser Center scholars and researchers

    Rethinking the liquidity puzzle: application of a new measure of the economic money stock

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    Historically, attempts to solve the liquidity puzzle have focused on narrowly defined monetary aggregates, such as non-borrowed reserves, the monetary base, or M1. Many of these efforts have failed to find a short-term negative correlation between interest rates and monetary policy innovations. More recent research uses sophisticated macroeconomic and econometric modeling. However, little research has investigated the role measurement error plays in the liquidity puzzle, since in nearly every case, work investigating the liquidity puzzle has used one of the official monetary aggregates, which have been shown to exhibit significant measurement error. This paper examines the role that measurement error plays in the liquidity puzzle by (i) providing a theoretical framework explaining how the official simple-sum methodology can lead to a liquidity puzzle, and (ii) testing for the liquidity effect by estimating an unrestricted VAR.Liquidity Puzzle, Monetary Policy, Monetary Aggregation, Money Stock, Divisia Index Numbers

    Detecting squarefree numbers

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    We present an algorithm, based on the explicit formula for LL-functions and conditional on GRH, for proving that a given integer is squarefree with little or no knowledge of its factorization. We analyze the algorithm both theoretically and practically, and use it to prove that several RSA challenge numbers are not squarefull.Comment: 31 pages, 3 figures, latest versio

    Mobility for Me but Not for Others: The Contradictory Cosmopolitan Practices of Contemporary White British Youth

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    This article seeks to problematise the perception that young people are committed cosmopolitans by highlighting some of the contradictory and contingent practices that young White British youth engage in. To do so, I explore a contradiction that emerged in my recent projects when young people talked about mobility and migration, namely how some White British youth want (and assume) freedom of movement for themselves but are opposed to freedom of movement when it involves immigrants coming to Britain. Here I argue that this can be viewed as an effort to enjoy the benefits of a cosmopolitan lifestyle (particularly through geographical mobility) while nonetheless wishing to limit opportunities for cultural Others to do likewise. This manifestation, I suggest, should be seen as a one-way form of cosmopolitanism that is not just contradictory, but also a reflection of the mixed messages young people in Britain receive about mobility, migration, multiculturalism, citizenship and individualism

    Flight test performance and description of a rocket vihicle for producing low-speed artificial meteors

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    Flight test of trailblazer i reentry vehicle and production of artificial iron meteor
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