Sökning: "oscillations"

Visar resultat 26 - 30 av 475 avhandlingar innehållade ordet oscillations.

  1. 26. A pumped ballistic quantum channel Ola Tageman

    Författare :Ola Tageman; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mode population; pumping; Rabi; FIR; quantum channel; oscillations; photovoltaic; ballistic; 2DEG; photo conductance;

    Sammanfattning : .... LÄS MER

  3. 27. Lipid Signalling Dynamics in Insulin-secreting β-cells

    Författare :Anne Wuttke; Anders Tengholm; Erik Gylfe; Louis Philipson; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ATP; β-cell; diacylglycerol; insulin secretion; oscillations; PtdIns 4 P; PtdIns 4; 5 P2; protein kinase C; P2Y receptor; Medical Cell Biology; Medicinsk cellbiologi;

    Sammanfattning : Certain membrane lipids are involved in intracellular signalling processes, among them phosphoinositides and diacylglycerol (DAG). They mediate a variety of functions, including the effects of nutrients and neurohormonal stimuli on insulin secretion from pancreatic β-cells. LÄS MER

  4. 28. Plasma Oscillations in Holographic Quantum Matter

    Författare :Marcus Tornsö; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; holography; quasinormal modes; gauge gravity duality; graphene; strong coupling; plasmonics; strongly correlated media;

    Sammanfattning : In this thesis we explore strongly correlated matter in the framework of holographic duality. Specifically, we examine the quasinormal modes of such systems, and we extend the current framework to efficiently and naturally cover plasmons and other collective modes that may be found within strongly correlated matter. LÄS MER

  5. 29. Cyclic AMP Oscillations in Insulin-Secreting Cells

    Författare :Jenny Sågetorp; Anders Tengholm; Erik Gylfe; Lena Stenson; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Medical cell biology; Medicinsk cellbiologi;

    Sammanfattning : Cyclic AMP is an intracellular messenger that regulates numerous processes in various types of cells. In pancreatic β-cells, cAMP potentiates the secretion of insulin by promoting Ca2+ signals and by amplifying Ca2+-triggered exocytosis. Whereas Ca2+ signals have been extensively characterized, little is known about the kinetics of cAMP signals. LÄS MER

  7. 30. Power System Oscillations - Detection, Estimation and Control

    Författare :Morten Hemmingsson; Industriell elektroteknik och automation; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elektroteknik; oscillation; power system; damping; power swing; distance protection; detection; estimation; real-time; reactive co-variation; control; Electrical engineering; load modulation; Automation; robotics; control engineering; Automatiska system; robotteknik; reglerteknik;

    Sammanfattning : The topic of this thesis is the electro-mechanical oscillations which to some extent always are present in a power system. The demand of electric power is ever increasing. At the same time, the tolerance of disruptions in the power supply is decreasing. LÄS MER