Sökning: "Tomas Leffler"

Hittade 2 avhandlingar innehållade orden Tomas Leffler.

  1. 1. Development and Application of Optical Diagnostics of Alkali Vapours for Solid Fuel Combustion

    Författare :Tomas Leffler; Förbränningsfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; UV Absorption Spectroscopy; Alkali Vapour Pressure; KCl; KOH; NaCl; NaOH; high-temperature corrosion; Laser-induced Photofragmentation Fluorescence; slagging; fouling; reduced maintenance cost; Fysicumarkivet A:2016:Leffler;

    Sammanfattning : Background: High amounts of alkali in the fuel, such as potassium and sodium in combination with high amounts of chlorine increase the chances of high-temperature corrosion, deposit growth and slagging and fouling. These risks need to be reduced to avoid losses in revenue due to unplanned stops and costs related to increased maintenance. LÄS MER

  3. 2. Hur ska du bli när du blir stor? : en studie i svensk gymnasieskola när entreprenörskap i skolan är i fokus

    Författare :Eva-Lena Lindster Norberg; Jörgen From; Eva Leffler; Tomas Kroksmark; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Citizenship; Entrepreneurship in school; Upper secondary school; Governmentality; pedagogik; Education;

    Sammanfattning : The general aim of this thesis is to examine and explain how education fosters future citizens when Swedish upper secondary schools work actively with entrepreneurship in school. Toward this aim, two research questions are asked: How are students governed and how do students govern when focus is on entrepreneurship in school? How do teachers relate to entrepreneurship in school? The study took place in a school development program with a focus on teachers developing their abilities and working with entrepreneurship in schools. LÄS MER