Search for dissertations about: "Mattias Persson"

Showing result 1 - 5 of 14 swedish dissertations containing the words Mattias Persson.

  1. 1. Lipases as Biocatalysts in Organic Media. Influence of Enzyme Preparation and Reaction Conditions on Activity and Selectivity

    Author : Mattias Persson; Avdelningen för klinisk kemi och farmakologi; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biochemical technology; Bioteknik; Biotechnology; water activity; temperature; enantioselectivity; immobilisation; organic solvents; lyophilisation; Lipases; Accurel EP-100; Biokemisk teknik; Proteins; enzymology; Proteiner; enzymologi;

    Abstract : The discovery that enzymes can function in organic solvents has broadened the scope of biocatalysis, making enzymes highly useful tools for organic chemists. The widespread use of enzymes as catalysts in organic solvents has, however, been limited by the low activity obtained for enzymes in organic solvents compared to aqueous solutions. READ MORE

  2. 2. Portfolio Selection and the Analysis of Risk and Time Diversification

    Author : Mattias Persson; Nationalekonomiska institutionen; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; economic policy; economic systems; economic theory; econometrics; Economics; Lower Partial Moment; Portfolio Selection; Parameter Uncertainty; Time Diversification; Bootstrap; Downside Risk; Estimation Risk; Nationalekonomi; ekonometri; ekonomisk teori; ekonomiska system; ekonomisk politik; Financial science; Finansiering;

    Abstract : This thesis is devoted to the analysis of three important issues in financial economics in general and portfolio selection in particular: the risk measure, estimation risk and time diversification. Besides a short introductory chapter the thesis consists of four empirical essays. READ MORE

  3. 3. Economic Evaluation of Mental Health Interventions for Children and Adolescents : the Case of Sweden

    Author : Mattias Persson; Mikael Svensson; Lars Hultkrantz; Ivar Sønbø Kristiansen; Örebro universitet; []
    Keywords : SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Children; adolescents; mental health; bullying; economic evaluation; intellectual disability; transition; Economics; Nationalekonomi;

    Abstract : The focus of this thesis is economic evaluations of programs and interventions regarding children and adolescents with mental health issues, victimization, and intellectual disabilities (ID). The first paper examines a potential link between mental health issues among adolescent and the class-size of the school class they are enrolled in. READ MORE

  4. 4. Frequency Response by Wind Farms in Islanded Power Systems with High Wind Power Penetration

    Author : Mattias Persson; Chalmers University of Technology; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Synthetic inertia; rate of change of frequency; inertia emulation; variable speed wind turbine; frequency control;

    Abstract : The integration of variable speed wind turbines (VSWT) in power systems keep increasing inorder to reduce the emission of green house gases. This increase of power electronic converterinterfaced generation causes a decrease of power system inertia and issues previously existingin power systems tend to become more complicated and new solutions should be evaluated. READ MORE

  5. 5. Frequency response by wind farms in power systems with high wind power penetration

    Author : Mattias Persson; Chalmers University of Technology; []
    Keywords : inertia estimation; frequency control; power system stability; wind power integration; Power system; synthetic inertia;

    Abstract : The integration of variable speed wind turbines (VSWT) in power systems is increasing in order to reduce the emission of green house gases. This increase of power electronic converter interfaced generation causes a decrease of power system inertia, increasing the risk of load shedding and system frequency instability. READ MORE