Sökning: "MMA"

Visar resultat 16 - 20 av 30 avhandlingar innehållade ordet MMA.

  1. 16. Numerical and experimental study of acoustic and structural optimization

    Författare :Mats Tinnsten; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Optimization; acoustics; Engineering mechanics; Teknisk mekanik; Datorstödd maskinkonstruktion;

    Sammanfattning : The main objective with this thesis has been to create a procedure (method and program code) that enables automatic optimization of acoustic response from vibrating structures. Automatic means that the proposed method, on its own, should be able to find the desired acoustic quantities for a given problem formulation by altering given variables. LÄS MER

  3. 17. Exposure to inorganic arsenic in pregnancy and metabolism-nutrition interaction

    Författare :Li Li; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Inorganic arsenic is metabolized by most mammals, including humans, via alternating reduction and oxidative methylation with S-adenosylmethionine as main methyl donor. Thus, it seems likely that it is influenced by the availability of methyl groups. LÄS MER

  4. 18. Mucosal regeneration following sinus surgery : an experimental study and clinical study

    Författare :Karin Forsgren; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :chronic sinusitis; histopathology; Caldwell-Luc operation; sinus surgery; rabbit; regeneration; sinus mucosa; experimental sinusitis; microcirculation; blood flow; vasoreactivity; nerve regeneration; sympathetic; neuropeptide Y; tyrosine hydroxylase; immunocytochemistry;

    Sammanfattning : The investigations described in this thesis concerned functional and structural aspects of the regenerated sinus mucosa following sinus surgery. In a biopsy material collected pre- and postoperatively from patients with chronic maxillary sinusitis, randomized for treatment with either Functional Endoscopic Sinus Surgery (FESS) or the Caldwell-Luc procedure (CL), histological parameters were evaluated semi-quantitatively and correlated to endoscopic findings and patients' symptoms. LÄS MER

  5. 19. Wood Nanotechnologies for Transparency, Fire Retardancy and Liquid Separation

    Författare :Qiliang Fu; Lars Berglund; Hiroyuki Yano; KTH; []
    Nyckelord :Teknisk materialvetenskap; Materials Science and Engineering; Fiber- och polymervetenskap; Fibre and Polymer Science;

    Sammanfattning : In this thesis, wood nanotechnologies for transparent, fire-retardant and hydrophobic/lipophilic wood have been developed. There are two main parts; wood template preparation/processing concepts and materials design using these templates.In the wood template processing part, highly porous nanostructured wood templates are prepared. LÄS MER

  7. 20. Ionic Liquid Lubricants for Space Applications

    Författare :Erik Nyberg; Ichiro Minami; Javier Martin-Torres; Maria-Dolores Bermudez; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machine Elements; Maskinelement;

    Sammanfattning : Lubrication is critical to the efficient and reliable operation of machine elements such as gears, bearings, or any other moving mechanical assembly (MMA). On Earth, machine designers are accustomed to the access of a wide range of liquid lubricants that enable predictable and reliable long-term operations of high performance MMA. LÄS MER