Sökning: "absorption coefficient"

Visar resultat 1 - 5 av 62 avhandlingar innehållade orden absorption coefficient.

  1. 1. Studies of water vapor transport and sorption in wood

    Författare :Lars Wadsö; Avdelningen för Byggnadsmaterial; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; evaluation; measurements; non-Fickian behavior; absorption; sorption method; transient; unsteady-state; wood; sorption; surface mass transfer coefficient; water vapor; error analysis;

    Sammanfattning : This thesis deals with the evaluation of measurements of water vapor transport and sorption in wood. It mainly concerns measurements of the weight response of a sample after a step change in relative humidity. The thesis consists of an introduction and eight papers. The eight papers have the following contents: 1. LÄS MER

  3. 2. Light scattering and absorption in tissue - models and measurements

    Författare :Annika M K Enejder; Atomfysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Tissue optical properties; Light absorption; Fluorescence spectroscopy; Atomic and molecular physics; NIR spectroscopy; Fysicumarkivet A:1997:Enejder; Light scattering; Atom- och molekylärfysik;

    Sammanfattning : In this work a number of theoretical models, describing light propagation in matter, have been applied to and developed for the examination of tissue. The aim was to model the light scattering and absorption in tissue in order to improve the understanding of underlying mechanisms of laser-based diagnostics and treatment modalities utilised for cancer and cardiovascular diseases. LÄS MER

  4. 3. First-Principles Study on Electronic and Optical Properties of Copper-Based Chalcogenide Photovoltaic Materials

    Författare :Rongzhen Chen; Clas Persson; Maria G. Ganchenkova; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; density functional theory; electronic structure; dielectric function; absorption coefficient; copper-based chalcogenides; ultra-thin film; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : To accelerate environmentally friendly thin film photovoltaic (PV) technologies, copper-based chalcogenides are attractive as absorber materials. Chalcopyrite copper indium gallium selenide (CIGS ≡ CuIn1–xGaxSe2) is today a commercially important PV material, and it is also in many aspects a very interesting material from a scientific point of view. LÄS MER

  5. 4. Glass mat reinforced thermoplastics - material, process and selected applications

    Författare :Jan Wahlberg; Industriell Produktion; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Material technology; recycling; sound absorption; energy absorption; vibrational energy; microtension; processing; Glass fibre; thermoplastics; Materiallära; materialteknik;

    Sammanfattning : The work presented in this thesis covers the processing of glass mat reinforced thermoplastics, GMT, and the mechanical properties of this material group. The thesis evaluates the possibilities of the material group from a processing and mechanical properties point of view. LÄS MER

  7. 5. Optical Absorption and Electrical Conductivity in Lithium Intercalated Amorphous Tungsten Oxide Films

    Författare :Lars Berggren; Gunnar A. Niklasson; Ola Hunderi; Uppsala universitet; []
    Nyckelord :Technology; Lithium intercalation; amorphous; tungsten-oxide; sputtered films; optical absorption; polaron radius.; TEKNIKVETENSKAP; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Optical and electrical properties of electrochemically lithium ion intercalated thin films of x-ray amorphous tungsten oxide made by magnetron sputtering on glass substrates coated with a thin layer of conductive tin doped indium oxide, have been studied. The composition and the density of the films were characterized by the ion beam analysis methods Rutherford Backscattering Spectroscopy and Elastic Recoil Detection Analysis. LÄS MER