Search for dissertations about: "fredrik uppsala universitet"
Showing result 1 - 5 of 259 swedish dissertations containing the words fredrik uppsala universitet.
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1. Si negative electrodes for Li-ion batteries : Aging mechanism studies by electrochemistry and photoelectron spectroscopy
Abstract : This thesis is focusing on the challenges when using Si as a possible new negative electrode material in Li-ion batteries. The overall aim is to contribute to a general understanding of the processes in the Si electrode, to identify aging mechanisms, and to evaluate how they influence the cycling performance. READ MORE
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2. Extreme Load Conditions for Wind Powered Direct Drive PM Generators
Abstract : Wind energy is a rapidly growing energy source with vast potential. Vertical axis wind turbines could be more cost-effective than the three bladed horizontal axis turbines that dominate today. READ MORE
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3. Improving the functionality of synchronous machines using power electronics
Abstract : With the advent of modern power electronics there is reason to explore what can be achieved when it is applied to a mature technology like synchronous machines. In this text several concepts will be presented on how it is possible to control forces and how to get better performance out of synchronous machines by using power electronics. READ MORE
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4. Four Papers on Top Management's Capital Budgeting and Accounting Choices in Practice
Abstract : This thesis contributes to an understanding of capital budgeting and accounting practice. The factors affecting practice are of special research interest. It is also investigated whether practice diverges from what is prescribed by finance text books and accounting standards/frameworks. READ MORE
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5. Self-Normalized Sums and Directional Conclusions
Abstract : This thesis consists of a summary and five papers, dealing with self-normalized sums of independent, identically distributed random variables, and three-decision procedures for directional conclusions. In Paper I, we investigate a general set-up for Student's t-statistic. READ MORE