960 resultados para Doctor of philosophy degree - Australia


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A theory is developed of an electrostatic probe in a fully-ionized plasma in the presence of a strong magnetic field. The ratio of electron Larmor radius to probe transverse dimension is assumed to be small. Poisson's equation, together with kinetic equations for ions and electrons are considered. An asymptotic perturbation method of multiple scales is used by considering the characteristic lengths appearing in the problem. The leading behavior of the solution is found. The results obtained appear to apply to weaker fields also, agreeing with the solutions known in the limit of no magnetic field. The range of potentials for wich results are presented is limited. The basic effects produced by the field are a depletion of the plasma near the probe and a non-monotonic potential surrounding the probe. The ion saturation current is not changed but changes appear in both the floating potential Vf and the slope of the current-voltage diagram at Vf. The transition region extends beyond the space potential Vs,at wich point the current is largely reduced. The diagram does not have an exponential form in this region as commonly assumed. There exists saturation in electron collection. The extent to which the plasma is disturbed is determined. A cylindrical probe has no solution because of a logarithmic singularity at infinity. Extensions of the theory are considered.

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COLLECTION OF PUBLISHED WORKS. DUE TO COPYRIGHT RESTRICTIONS ONLY AVAILABLE FOR CONSULTATION AT ASTON UNIVERSITY LIBRARY AND INFORMATION SERVICES WITH PRIOR ARRANGEMENT.

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Se abordan los reglamentos, selección, financiación de la Investigación y observaciones generales acerca de la obtención del grado de Doctor en las Universidades inglesas.

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Presents a comprehensive collection of essays designed to guide current and prospective doctoral candidates through the amazing journey of doctoral study. Includes chapters on beginning candidature, selecting a supervisor, countering isolation, engaging support structures, and more.

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On May 13, 2006, University of Missouri awarded Lloyd Gaines Doctor of Law degree.

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Thesis consists of a novel and an exegesis with bibliography. There is no title page or abstract provided by the author.