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Visar resultat 1 - 5 av 6 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. A Numerical and Experimental Investigation of the Internal Flow of a Freezing Water Droplet

    Författare :Linn Karlsson; Alexander Kaplan; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

    Sammanfattning : The overarching aim of this work is to study the freezing process of a single water droplet freezing on a cold surface, which is an interesting and important phenomenon with possible applications in many areas. Understanding the freezing process of a single water droplet is for example an important step when preventing unwanted icing, e.g. LÄS MER

  3. 2. The Internal Flow in Freezing Water Droplets

    Författare :Linn Karlsson; Staffan Lundström; Anna-Lena Ljung; Jasmina Casals-Terré; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strömningslära; Fluid Mechanics;

    Sammanfattning : The aim of this work has been to study the internal flow in freezing water droplets on a cold surface and to investigate the different heat transfer mechanisms involved. This is an interesting topic with a great number of applications, specifically in areas where the prevention of unwanted icing is important, e.g. LÄS MER

  4. 3. Aerosol–cloud interactions in a warming Arctic

    Författare :Linn Karlsson; Paul Zieger; Radovan Krejci; Annica M. L. Ekman; Birgit Wehner; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; aerosols; clouds; aerosol-cloud interactions; Arctic; climate; field studies; Environmental Sciences; miljövetenskap;

    Sammanfattning : Atmospheric aerosol particles are small liquid or solid particles suspended in the air. They are present in the atmosphere all around us and affect the planetary energy balance by scattering and absorbing radiation and by interacting with clouds. In model projections of future climate, aerosol–cloud interactions contribute a lot of uncertainty. LÄS MER

  5. 4. Chronic Pain and Exercise : Studies on pain intensity, biochemistry, adherence and attitudes

    Författare :Linn Karlsson; Britt Larsson; Björn Gerdle; Gerhard Andersson; Esa-Pekka Takala; ernilla Åsenlöf; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Adherence; biochemical substances; chronic pain; physical activity and exercise; treatment;

    Sammanfattning : Chronic pain is common in western countries and entails considerable consequences for the afflicted individuals as well as for the society. Furthermore, chronic pain is complex including an advanced interplay between biological-, psychological- and social aspects. LÄS MER

  7. 5. Essays on inputs, admissions and returns to education

    Författare :Linn Karlsson; David Granlund; Magnus Wikström; Sandra McNally; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Economics of education; computers; TIMSS; academic achievement; admissions; upper secondary grades; SweSAT; underprediction; gender differences; adult education; second-chance education; Economics; nationalekonomi;

    Sammanfattning : Paper [I] analyses the associations between computer use in schools and at home and test scores by using TIMSS (Trends in International Mathematics and Science Study) data for more than 900,000 fourth-graders in 2011 and 2015. Pupils who used computers at school, especially those who used them frequently, scored lower than students who never used computers. LÄS MER