Sökning: "plate"

Visar resultat 21 - 25 av 714 avhandlingar innehållade ordet plate.

  1. 21. Studies of parallel plate electron multipliers

    Författare :Birgitta Gelin; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  3. 22. Design of hat fed reflector antennas using FDTD

    Författare :Jian Yang; Per-Simon Kildal; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; soft and hard surfaces; finite difference time domain FDTD method; sperture efficiencies; Gaussian vertex plate; corrugations; edge corrugations; hat feed antenna; phase center; vertex plate; ring-focus paraboloid; paraboloid; V2D code; ring-shaped phase center; BOR1 antenna; reflector shaping; reflector antenna;

    Sammanfattning : .... LÄS MER

  4. 23. Motion Vision Processing in Fly Lobula Plate Tangential Cells

    Författare :Yu-Jen Lee; Karin Nordström; Holger Kraap; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; hoverflies; EMD; higher order motion; octopamine; cSIFE; figure-ground discrimination; motion vision; lobula plate tangential cells;

    Sammanfattning : Flies are highly visually guided animals. In this thesis, I have used hoverflies as a model for studying motion vision. Flies process motion vision in three visual ganglia: the lamina, the medulla, and the lobula complex. In the posterior part of lobula complex, there are around 60 lobula plate tangential cells (LPTCs). LÄS MER

  5. 24. Dynamic Anisotropic and Piezoelectric Plate Equations - A Power Series Approach with Recursion Relations among the Expansion Functions

    Författare :Karl Mauritsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Piezoelectricity; Plate equations; Anisotropy; Plates; Recursion relations; Power series expansions; Thin layers; Hamilton s principle; Laminates;

    Sammanfattning : The subject of this thesis is dynamics of plates. Both anisotropic elastic plates, piezoelectric plates, thin piezoelectric layers on elastic plates and elastic laminates are considered. Piezoelectric materials are often used in sensors and actuators and common applications for these are vibration control and ultrasonic transducers. LÄS MER

  7. 25. Estrogen actions in the growth plate cartilage

    Författare :Maryam Iravani; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Estrogens may influence bone growth locally or systemically via the estrogen receptors alpha (ERα), beta (ERβ) and G protein-coupled estrogen receptor 1 (GPER-1). In Paper I, our study showed that the treatment of ovariectomized C57BL/6 mice with a selective ERα agonist 1,3,5-tris(4-hydroxyphenyl)-4-propyl-1H-pyrazole (PPT) reduced growth plate height and hypertrophic zone height suggesting that the effect was induced via ERα. LÄS MER