Search for dissertations about: "J Petersson"
Found 5 swedish dissertations containing the words J Petersson.
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1. k-space Models in MRI Using the Concept of Partitions, Applications with special reference to Overhauser-enhanced techniques
Abstract : A new model describing the image formation in magnetic resonance imaging (MRI) has been developed. The k-space description of MRI pulse sequences is expanded by introducing new dimensions to describe the phase dispersion due to flow, acceleration, jerk, diffusion and magnetic field inhomogeneities. READ MORE
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2. Neuroendocrine studies in patients with affective disorders
Abstract : Background: Affective disorders are common and a major cause for increased disability and mortality worldwide. Exogenous stressors and biological variables, including neuroendocrine factors, are assumed to contribute to an increased vulnerability to mood dysregulation. READ MORE
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3. Infinite dimensional holomorphy in the ring of formal power series : partial differential operators
Abstract : We study holomorphy in the ring of formal power series in an infinite number of variables. Thus we restrict our study to (infinite dimensional) holomorphy on sequence spaces and we show that we obtain a rich theory without requiring any topological structure on the domain space. We make a comprehensive PDO-study for the spaces under consideration. READ MORE
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4. Impact of erosion and deposition processes on wall materials in tokamaks
Abstract : Understanding of material migration and control of fuel retention are essential for the safe operation of a reactor-class fusion machine. Work presented in the thesis focuses on erosion-deposition processes which are decisive for the formation and properties of co-deposited fuel-containing layers on plasma-facing and diagnostic components, and for the dust formation. READ MORE
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5. Finite Difference Methods for Wave Dominated Problems
Abstract : Wave models are an important class of models that describe many diverse phenomena such as sound waves, fluid flow, and quantum mechanics. These models are often described mathematically as partial differential equations (PDE). Often these equations do not admit solutions on closed-form and then the only option to study them is numerical methods. READ MORE