435 research outputs found

    Thermodynamic properties of an interacting hard-sphere Bose gas in a trap using the static fluctuation approximation

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    A hard-sphere (HS) Bose gas in a trap is investigated at finite temperatures in the weakly-interacting regime and its thermodynamic properties are evaluated using the static fluctuation approximation (SFA). The energies are calculated with a second-quantized many-body Hamiltonian and a harmonic oscillator wave function. The specific heat capacity, internal energy, pressure, entropy and the Bose-Einstein (BE) occupation number of the system are determined as functions of temperature and for various values of interaction strength and number of particles. It is found that the number of particles plays a more profound role in the determination of the thermodynamic properties of the system than the HS diameter characterizing the interaction, that the critical temperature drops with the increase of the repulsion between the bosons, and that the fluctuations in the energy are much smaller than the energy itself in the weakly-interacting regime.Comment: 34 pages, 24 Figures. To appear in the International Journal of Modern Physics

    Thermoelectric properties and high-temperature stability of the Ti<sub>1-x</sub>V<sub>x</sub>CoSb<sub>1-x</sub>Sn<sub>x</sub> half-Heusler alloys

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    The thermoelectric properties and high-temperature stability of the Ti1−xVxCoSb1−xSnx solid solution have been investigated.</p

    Extended Gram-type determinant, wave and rational solutions to two (3+1)-dimensional nonlinear evolution equations

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    a b s t r a c t New exact Grammian determinant solutions to two (3+1)-dimensional nonlinear evolution equations are derived. Extended set of sufficient conditions consisting of linear partial differential equations with variable-coefficients is presented. Moreover, a systematic analysis of linear partial differential equations is used for solving the representative linear systems. The bilinear BĂ€cklund transformations are also constructed for the equations. Also, as an application of the bilinear BĂ€cklund transforms, a new class of wave and rational solutions to the equations are explicitly computed

    An investigation into export market orientation in UK universities from the international marketing manager's perspective : a mixed-method approach

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    Recent developments in the theories of export marketing have resulted in the conceptualisation of export market orientation in the manufacturing industry. However, little research investigating the concept of export market orientation in the higher education context exists, despite the importance of the export market in shaping the direction of the marketing of higher education. Building on the existing literature on export marketing and higher education marketing, this research offers a conceptualisation of export market orientation in universities and its antecedents and consequences from a managerial perspective. A mixed-method research design was adopted, consisting of two main phases. The first phase involved conducting key informant interviews with the international marketing managers of UK universities. Together with the literature review, an analysis of the key themes led to the development of research hypotheses and an operational model. The model was tested in the second phase with a survey directed at the international marketing managers of different UK universities. Partial Least Squares structural equation modelling was used to analyse the survey responses. The structural model showed a good fit with the data and good convergent, discriminant and nomological validity and reliability stability. This research is the first to formulate and develop the concepts of export market orientation and export performance in the higher education context. The outcome of this research adds new perspectives to the growing body of higher education marketing literature, and suggests directions for future research. This research also offers important implications for management bodies in universities, academia and public policy-makers alike.EThOS - Electronic Theses Online ServiceGBUnited Kingdo
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