Sökning: "thermal stress"

Visar resultat 1 - 5 av 239 avhandlingar innehållade orden thermal stress.

  1. 1. Analysis of thermal shock in brittle materials

    Detta är en avhandling från Stockholm : Materialvetenskap

    Författare :Marianne Collin; KTH.; [2001]
    Nyckelord :thermal shock; thermal stress; stress intensity; vickers indentation; alumina; silicon varbide whisker reinforced alumina;

    Sammanfattning : This thesis concerns thermal shock damage of ceramicmaterials. More specifically the work is focused on theoreticaland practical aspects of a new technique for determining thethermal shock resistance of brittle materials. LÄS MER

  2. 2. Exosomes and the NKG2D receptor-ligand system in pregnancy and cancer using stress for survival

    Detta är en avhandling från Umeå : Umeå university

    Författare :Malin Hedlund; Umeå universitet.; [2010]
    Nyckelord :Exsosomes; NKG2D; MICA; MICB; ULBP; human placenta; trophoblast; syncytiotrophoblast; thermal stress; oxidative stress; leukemia; lymphoma; immunologi; Immunology;

    Sammanfattning : Although not obvious at first sight, several parallels can be drawn between pregnancy andcancer. Many proliferative, invasive and immune tolerance mechanisms that supportnormal pregnancy are also exploited by malignancies to establish a nutrient supply andevade or edit the immune response of the host. LÄS MER

  3. 3. Dynamic Solid Oxide Fuel Cell Modelling for Non-steady State Simulation of System Applications

    Detta är en avhandling från Faculty of Engineering, LTH Department of Energy Sciences Division of Thermal Power Engineering

    Författare :Miriam Kemm; Lunds universitet.; Lund University.; [2006]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; termodynamik; applied thermodynamics; Termisk teknik; Transient analysis; Technological sciences; Teknik; Energy research; Energiforskning; Thermal engineering; Thermal stress; Solid Oxide Fuel Cell; Fuel cell modelling;

    Sammanfattning : Most of the world's energy generation is based on fossil fuels such as coal and oil, which already today but even more in the future, will cause various problems. One issue is their limited availability, which stands in conflict to the increasing global energy consumption. LÄS MER

  4. 4. Cold exposure and thermal comfort among patients in prehospital emergency care innovation research in nursing

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Jonas Aléx; Umeå universitet.; [2015]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; thermal comfort; thermal discomfort; cold exposure; cold stress; hypothermia; patients’ experiences; active warming; prehospital emergency care; finger temperature; back temperature; omvårdnadsforskning med medicinsk inriktning; Caring Sciences;

    Sammanfattning : BackgroundPatients’ cold exposure is a neglected problem in prehospital emergency care. Cold stress increases pain and anxiety and contributes to fear and an overall sense of dissatisfaction. When left untreated, cold stress disturbs vital body functions until ultimately reaches hypothermia. LÄS MER

  5. 5. Modeling and Testing of Insulation Degradation due to Dynamic Thermal Loading of Electrical Machines

    Detta är en avhandling från Division of Industrial Electrical Engineering and Automation, Faculty of Engineering, Lund University

    Författare :Zhe Huang; Lunds universitet.; Lund University.; [2017-01-03]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thermal degradation; thermal cycle; dynamic temperature; thermal-mechanical; fatigue; electrical insulation system; accelerated testing; condition monitoring; electrical machine; electrified vehicles;

    Sammanfattning : Electrical machines in electrified vehicles are subjected to dynamic loadings at different driving conditions, which results in dynamic temperatures. The aging of the Electrical Insulation System (EIS) in electrical machines is caused by these dynamic temperatures, namely high average temperatures and temperature cycles. LÄS MER