Sökning: "Kristina Lindgren"

Hittade 5 avhandlingar innehållade orden Kristina Lindgren.

  1. 1. Effects of Irradiation and Thermal Ageing on the Nanoscale Chemistry of Steel Welds

    Författare :Kristina Lindgren; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; spinodal decomposition; thermal ageing; low alloy steel; reactor pressure vessel; irradiation damage; atom probe tomography; core barrel; clustering;

    Sammanfattning : Structural materials of nuclear power plants degrade during operation due to thermal ageing and irradiation from the reactor core. Effects on the materials are an increase in hardness and tensile strength, and a decrease in ductility and fracture toughness, i. e. embrittlement. LÄS MER

  3. 2. Radiation Induced Precipitation in Reactor Pressure Vessel Steel Welds

    Författare :Kristina Lindgren; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; precipitation; irradiation damage; low alloy steel; reactor pressure vessel; atom probe tomography;

    Sammanfattning : Radiation induced clustering and precipitation affect the mechanical properties of the reactor pressure vessel (RPV) of a nuclear power plant, i.e. the material becomes embritteled. The combination of low Cu (0. LÄS MER

  4. 3. Si negative electrodes for Li-ion batteries : Aging mechanism studies by electrochemistry and photoelectron spectroscopy

    Författare :Fredrik Lindgren; Fredrik Björefors; Kristina Edström; Anna Andersson; Miguel Ángel Muñoz; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : 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. LÄS MER

  5. 4. Language policy and Sámi education in Sweden : ideological and implementational spaces for Sámi language use

    Författare :Kristina Belancic; Eva Lindgren; Patrik Lantto; Ylva Jannok Nutti; Hilde Sollid; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Sámi language use; Sámi Indigenous education; implementational and ideological spaces; Swedish Sápmi; language teaching and learning; språkdidaktik;

    Sammanfattning : In Sámi schools in Sweden, the use of the Sámi languages and Swedish as languages of instruction is regulated by government and education policy; legislation allows Sámi and Swedish to be used for teaching and learning. However, agency and personal beliefs about Sámi languages play important roles in language use. LÄS MER

  7. 5. Biomarkers and risk of intracerebral hemorrhage : population-based studies in northern Sweden

    Författare :Kristina Johansson; Marcus Lind; Lars Johansson; Jan-Håkan Jansson; Arne Lindgren; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Intracerebral hemorrhage; hemorrhagic stroke; factor XII; D-dimer; von Willebrand factor; ABO blood groups; phosphatidylethanol; alcohol; risk markers; biomarkers; Medicine; medicin;

    Sammanfattning : BackgroundIntracerebral hemorrhage (ICH) is a disease associated with a high morbidity and mortality and treatment options for the condition are limited. Even though an ICH event usually comes as a surprise to the affected individual, pathogenetic processes often have occurred before the sudden ICH event and may have preceded disease onset by years. LÄS MER