Sökning: "Per Edström"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Per Edström.

  1. 1. Mathematical modeling and numerical tools for simulation and design of light scattering in paper and print

    Detta är en avhandling från Sundsvall : Mittuniversitetet

    Författare :Per Edström; Mittuniversitetet.; Mittuniversitetet.; [2007]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mathematical modeling; radiative transfer; integro-differential equations; inverse problems; parameter estimation; solution method; numerical performance; light scattering; paper industry applications; Kubelka-Munk; MATHEMATICS; MATEMATIK;

    Sammanfattning : This work starts with a real industrial problem - the perceived need for a moredetailed and more accurate model for light scattering in paper and print than theKubelka?Munk model of today. A careful analysis transfers this problem into aphysical description of the phenomena involved. LÄS MER

  2. 2. Mathematical Modelling of Light Scattering in Paper and Print

    Detta är en avhandling från Sundsvall : Mittuniversitetet

    Författare :Per Edström; Mittuniversitetet.; Mittuniversitetet.; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mathematical modeling; radiative transfer; solution method; numerical stability; speed; light scattering; light absorption; Kubelka-Munk; errors; reflectance calculations; MATHEMATICS; MATEMATIK;

    Sammanfattning : A problem formulation and a solution method are outlined for the radiative transfer problem in vertically inhomogeneous scattering and absorbing media, using discrete ordinate model geometry. The treatment spans from the physical problem via a continuous formulation, a discretization and a numerical analysis, to an implementation with performance evaluation and application to real-world problems. LÄS MER

  3. 3. Flexibel utbildning i gymnasieskolan : Utvidgade klassrum och minskad transaktionell distans

    Detta är en avhandling från Uppsala : Pedagogiska institutionen

    Författare :Rolf Edström; Uppsala universitet.; [2002]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Education; ICT; transactional distance; flexible education; autonomy; individualized instruction; upper secondary school; Pedagogik; SOCIAL SCIENCES Social sciences Education; SAMHÄLLSVETENSKAP Socialvetenskap Pedagogik; pedagogik; Education;

    Sammanfattning : During the 1990s radical reforms were effected in the Swedish school, at the same time as computerizing and the use of Internet increased considerably. The thesis discusses the dynamics and uncertainty that arise when changes and new technique appear in school and shall be combined with already ongoing works of change. LÄS MER

  4. 4. Exploring the dual nature of engineering education Opportunities and challenges in integrating the academic and professional aspects in the curriculum

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Kristina Edström; KTH.; [2017]
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; engineering education; professional education; dual nature; engineering education development; CDIO Initiative; CDIO approach; CDIO Standards; PBL; engineering education research; Carl Richard Söderberg; organisational gravity; institutional logics; Teknik och lärande; Technology and Learning;

    Sammanfattning : Engineering education is both academic, emphasising theory in a range of subjects, and professional, preparing students for engineering practice. Ideally, these aspects are also in a meaningful relationship in the curriculum, but the dual nature ideal is simultaneously a source of tensions. LÄS MER

  5. 5. Long-wave ultraviolet radiation (UVA1) and visible light : Therapeutic and adverse effects in human skin

    Detta är en avhandling från Stockholm : Karolinska Institutet, Department of Medicine

    Författare :Desiree Wiegleb Edström; Karolinska Institutet.; Karolinska Institutet.; [2001]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Ultraviolet-A; visible light; p53; p21WAF-1; bcl-2; CD34; port-wine stains; mycosis fungoides; dye laser; photodynamic therapy.;

    Sammanfattning : We studied the effects of repetitive low-dose UVA1 radiation and visible light in normal sunshielded skin, using immunohistochemical staining for p53, p21WAF-1, bcl-2, Ki67 and cyclin A. An increased expression of Ki67 after UVA1 and visible light were observed as a sign of increased proliferation. LÄS MER