16,598 research outputs found

    Taking capital for social purposes to a new level

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    Community development

    Predicting Performance Of Initial Public Offering (IPO) Firms: Should Human Resource Management (HRM) Be In The Equation?

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    Population ecology is utilized to understand the role of human resource management (HRM) in enhancing the performance of initial public offering (IPO) companies. This is done by examining the determinants of structural inertia and developing hypotheses on the relationship between HRM and organizational performance. The results indicate that two human resource variables (human resource value and organization-based rewards) predict initial investor reaction and long-term survival. The rewards variable negatively affects initial performance while positively impacting survival

    On the interactions between molecules in an off-resonant laser beam:Evaluating the response to energy migration and optically induced pair forces

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    Electronically excited molecules interact with their neighbors differently from their ground-state counterparts. Any migration of the excitation between molecules can modify intermolecular forces, reflecting changes to a local potential energy landscape. It emerges that throughput off-resonant radiation can also produce significant additional effects. The context for the present analysis of the mechanisms is a range of chemical and physical processes that fundamentally depend on intermolecular interactions resulting from second and fourth-order electric-dipole couplings. The most familiar are static dipole-dipole interactions, resonance energy transfer (both second-order interactions), and dispersion forces (fourth order). For neighboring molecules subjected to off-resonant light, additional forms of intermolecular interaction arise in the fourth order, including radiation-induced energy transfer and optical binding. Here, in a quantum electrodynamical formulation, these phenomena are cast in a unified description that establishes their inter-relationship and connectivity at a fundamental level. Theory is then developed for systems in which the interplay of these forms of interaction can be readily identified and analyzed in terms of dynamical behavior. The results are potentially significant in Förster measurements of conformational change and in the operation of microelectromechanical and nanoelectromechanical devices. © 2009 American Institute of Physics

    Fermionic solution of the Andrews-Baxter-Forrester model II: proof of Melzer's polynomial identities

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    We compute the one-dimensional configuration sums of the ABF model using the fermionic technique introduced in part I of this paper. Combined with the results of Andrews, Baxter and Forrester, we find proof of polynomial identities for finitizations of the Virasoro characters χb,a(r−1,r)(q)\chi_{b,a}^{(r-1,r)}(q) as conjectured by Melzer. In the thermodynamic limit these identities reproduce Rogers--Ramanujan type identities for the unitary minimal Virasoro characters, conjectured by the Stony Brook group. We also present a list of additional Virasoro character identities which follow from our proof of Melzer's identities and application of Bailey's lemma.Comment: 28 pages, Latex, 7 Postscript figure

    Analysis of high-speed rotating systems using Timoshenko beam theory in conjunction with the transfer matrix method

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    Higher operating speeds and increased sensitivity of modern electro-mechanical systems require improved methods for the computation of critical speeds and system response of flexible rotating shafts. Many high-speed systems generally contain disks with masses approaching the mass of the shaft. These observations emphasize the importance of including the effects of rotatory inertia and shear deformation of the shaft in the analysis. Traditional theory, which models a massless shaft, would be inaccurate for these systems. An analysis of flexible rotor systems has been performed using the Transfer Matrix Method. Although the method is well known, the present study utilizes Timoshenko Beam Theory in the construction of field matrices, which relate state vectors at adjacent nodes of the system. This approach takes into consideration the effects of transverse shear and rotatory inertia. Also included in the model are gyroscopic effects of the spinning disks. These effects are generally neglected in classical rotor dynamic theory. A general model was developed for the analysis of typical configurations in which the shaft is simply supported, and can carry an arbitrary number of disks. Numerical simulations were performed for comparision with classical results. These case studies show agreement with what is to be expected by introducing the greater flexibility of Timoshenko Beam Theory and the stiffening effects of gyroscopic couples

    Comment on 'Non-equilibrium thermodynamics of light absorption'

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    A recent paper by Meszéna and Westerhoff (1999 J. Phys. A: Math. Gen. 32 301) has aimed to address what is referred to as a principal question of biological thermodynamics, the possibility of describing photosynthesis in terms of non-equilibrium thermodynamics. The issue is associated with a misrepresentation of the fundamental photophysics involved, and as a result the analysis is invalid

    Supraglottic Laryngeal Mass

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    [WestJEM. 2009;10(4):298-299.

    Fairness and Appeasement: Achievement and Affiliation Motives in Interpersonal Relations

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    Subjects who were high on achievement or affiliation needs and who performed relatively well or poorly on a spatial orientation task were asked to distribute rewards between themselves and either an equitable, egalitarian, self-serving, or generous programmed partner. In general, regardless of the partner\u27s behavior, subjects high in need for achievement demonstrated a general appreciation for performance differences and tended to allocate rewards equitably. Affiliation-oriented subjects, however, appeared to focus on the response tendencies of their partner and behave in kind; they divided points equitably with an equitable partner, equally with an egalitarian partner, and self-interestedly with a self-serving partner. Subjects high in both achievement and affiliation tended to exploit the generous partner. The results are explained in terms of the competitive and cooperative interpersonal styles that achievement-oriented and affiliation-oriented subjects, respectively, possess

    Evaluation of Pneumatic Massage in Automotive Seating.

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