Sökning: "degradation environment"

Visar resultat 21 - 25 av 352 avhandlingar innehållade orden degradation environment.

  1. 21. Service life estimation in building design : A development of the factor method

    Författare :Björn Marteinsson; Christer Sjöström; Michael A. Lacasse; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Construction engineering; factor method; service life prediction; durability; degradation; Byggnadsteknik; Building engineering; Byggnadsteknik;

    Sammanfattning : The built environment usually constitutes a very important part of the real capital of a nation, and the construction sector represents more than 10% of the yearly Gross National Product of the industrialised world. Good planning of all construction is important, and consideration of the service life of the work is of great interest and is a significant aspect of sustainability considerations. LÄS MER

  3. 22. Service Life Estimations in the Design of Buildings : A Development of the Factor Method

    Författare :Björn Marteinsson; Högskolan i Gävle; []
    Nyckelord :Construction engineering; factor method; service life prediction; durability; degradation;

    Sammanfattning :   The built environment usually constitutes a very important part of the real capital of a nation, and the construction sector represents more than 10% of the yearly Gross National Product of the industrialised world. Good planning of all construction is important, and consideration of the service life of the work is of great interest and is a significant aspect of sustainability considerations. LÄS MER

  4. 23. Poly(Lactide-co-Glycolide) in Controlled-Release Pharmaceuticals - Release Mechanisms

    Författare :Susanne Fredenberg; Avdelningen för kemiteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; PLGA; Poly lactide-co-glycolide ; Release mechanism; Diffusion; Controlled Release; Degradation; Protein;

    Sammanfattning : Controlled-release formulations reduce the frequency of injections and better maintain plasma concentrations within the therapeutic window. Poly(D,L-lactide-co-glycolide) (PLG) is currently the most frequently used biodegradable polymer for this application. LÄS MER

  5. 24. Reuse of construction materials : Environmental performance and assessment methodology

    Författare :Liselott Roth; Mats Eklund; Helge Brattebø; Linköpings universitet; []
    Nyckelord :Environment; societal industrial ecology SIE ; reuse of construction materials; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : Reuse is a measure for resource-saving materials and energy use, which is stressed in the concept of kretsloppsanpassning, or societal industrial ecology (SIE), as it will be termed in this thesis. Reuse is here used as a general term for any kind of reuse and divided into recirculation, upgrading and cascading, according to the degradation of the inner material structure. LÄS MER

  7. 25. Silicone Rubber Insulators: Impacts of Material Formulation in Coastal Environment

    Författare :Tomas G Gustavsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; surface characterization; aging; filler level; outdoor insulation; leakage current measurements; material formulation; silicone rubber; polymeric insulators; coastal environment; polydimethylsiloxane PDMS ;

    Sammanfattning : This thesis deals with influences of material formulation on the performance of silicone rubber high voltage insulators in a coastal environment. Samples and insulators with known differences in material compositions have been used in this task. In the first step, a screening test with cylindrical samples was initiated. LÄS MER