Sökning: "mariana"

Visar resultat 1 - 5 av 35 avhandlingar innehållade ordet mariana.

  1. 1. Online power transformer diagnostics using multiple modes of microwave radiation

    Författare :Mariana Dalarsson; Martin Norgren; Sven Nordebo; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; inverse problem; multiple modes; power transformers;

    Sammanfattning : In the present thesis, we propose and investigate a new approach to diagnose the effects of the various degradation mechanisms, including thermal degradation at hot spots, winding deformations due to the mechanical forces from short circuit currents, partial discharges due to local electric field surges, and increased moisture levels in the cellulose insulation due to decomposition, that affect electric power transformers during their normal operation in an electric power grid.Although the proposed diagnostics method can in principle be used to detect various degradation mechanisms mentioned above, we focus in the present thesis on mechanical deformations of transformer winding structures. LÄS MER

  3. 2. POROUS POLYMERS AND DESIGNED SORBENTS FOR APPLICATIONS IN BIOMEDICAL RESEARCH

    Författare :Mariana Duarte; Avdelningen för Biomedicinsk teknik; []
    Nyckelord :polymers; sorbents; polymer porosity; selective extraction; biomarkers; molecularly imprinted polymers;

    Sammanfattning : Everyday millions of bioanalyses are performed in clinical laboratories, hospitals and research centers, where technicians and bio-analysts utilize analytical chemistry principles and instruments to serve medicine and biomedical research. A method routinely used for sample preparation in bioanalysis is solid-phase extraction (SPE). LÄS MER

  4. 3. Individual needs and psychosocial health among victims of intimate partner violence

    Författare :Mariana Dufort; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Intimate partner violence (IPV) is a pervasive public health concern associated with a range of lifelong health consequences and social adversities. The overall aim of this thesis is to contribute to an improved understanding of how individual and contextual factors are related to social and psychological health among victims of intimate partner violence. LÄS MER

  5. 4. Hormonal regulation of the primate uterus : effects of hormone treatment and lifestyle intervention

    Författare :Mariana Hulchiy; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :endometrium;

    Sammanfattning : The uterus is a major hormone-responsive reproductive organ in primates. Hormones promote their effect via different pathways. Receptors involved in steroid hormone, thyroid hormone and insulin signaling have been found in the endometrium. LÄS MER

  7. 5. Essays in Financial Economics

    Författare :Mariana Khapko; Handelshögskolan i Stockholm; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : .... LÄS MER