Sökning: "proper function"

Visar resultat 6 - 10 av 395 avhandlingar innehållade orden proper function.

  1. 6. Model Vertices Beyond the GW Approximation

    Författare :Mikael Hindgren; Matematisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Matematisk och allmän teoretisk fysik; thermodynamics; statistical physics; gravitation; GW approximation; Electron self energy; Green s function; consistency; local-field corrections; vertex function; conserving approximations; variational energies; Mathematical and general theoretical physics; classical mechanics; relativity; quantum mechanics; klassisk mekanik; kvantmekanik; relativitet; statistisk fysik; termodynamik; Fysicumarkivet A:1997:Hindgren;

    Sammanfattning : We study the effects of local vertex corrections to the self energy of the electron gas. We find that a vertex derived from time-dependent density-functional theory can give accurate self energies without including the explicit time dependence of the exchange-correlation potential provided, however, that a proper decay at large momentum transfer (large q) is built into the vertex function. LÄS MER

  3. 7. Photosynthetic water oxidation : the function of two extrinsic proteins

    Författare :Tatiana Shutova; Göran Samuelsson; Stenbjörn Styring; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; photosystem II; Psb0; Cah3; water oxidation; Plant physiology; Växtfysiologi;

    Sammanfattning : The solar energy accumulated by photosynthesis over billions of years is the sole source of energy available on Earth. Photosystem II (PSII) uses the sunlight to split water, an energetically unfavorable reaction where electrons and protons are extracted from water and oxygen is released as a by-product. LÄS MER

  4. 8. Preskriptionens funktioner : Fordringsrättsliga och ersättningsrättsliga problem i komparativ belysning

    Författare :Herbert Jacobson; Göran Millqvist; Tom Madell; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Civilrätt; Private law; Civilrätt;

    Sammanfattning : The starting point of this thesis is the Swedish rule regarding limitation of non-contractual tort claims. According to this rule, based on Swedish common law, such a tort claim is limited by statute 10 years after the occurrence of the event giving rise to the damage. LÄS MER

  5. 9. Studies of metazoan proteasome function and regulation

    Författare :Josefin Lundgren; Patrick Young; Michael Glickman; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; proteasome ubiquitin RNAi microarray; Molecular biology; Molekylärbiologi; molekylärbiologi; Molecular Biology;

    Sammanfattning : Biological processes depend upon the structural and functional quality of the molecules that comprise living organisms. The integrity of molecules such as DNA, RNA, proteins, carbohydrates and lipids is crucial and the precise three-dimensional shape and the detailed chemistry of these molecules orchestrate the biochemical processes vital for life. LÄS MER

  7. 10. Multiconductor transmission lines wideband modeling : A delay-rational Green’s-function-based method

    Författare :Maria De Lauretis; Jonas Ekman; Giulio Antonini; Wil Schilders; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industriell elektronik; Industrial Electronics;

    Sammanfattning : The performance of variable-frequency drives (VFDs) commonly used in energy production plants can be severely affected by electromagnetic (EM) noise in the form of conducted disturbances.A VFD is composed of an inverter, a motor, and a connecting power cable. LÄS MER