Sökning: "oscillatory force"

Visar resultat 6 - 10 av 10 avhandlingar innehållade orden oscillatory force.

  1. 6. Quantum mechanical effects on charge transport in two mesoscopic systems

    Författare :Gustav Sonne; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nanoelectromechanical systems; NEMS; carbon nanotubes; carbon peapods; excess current; superconducting weak links; suspended carbon nanotubes; non-linear resonances;

    Sammanfattning : Carbon nanotubes are one of the most promising building blocks for the developing field of nanoelectromechanics. Due to their unique electronic and mechanical properties, these all-carbon systems have been suggested for a range of applications where one wishes to utilse the coupling between mechanical and electronic degrees of freedom on the nanometer length scale. LÄS MER

  3. 7. Generation of magnetic fields in plasmas

    Författare :Nitin Shukla; Gert Brodin; Dusan Jovanovic; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Relativistic and non-relativistic plasma outflows are quite ubiquitous in astrophysical scenarios, as well as in laboratory plasmas. The propagation of relativistic and non- relativistic charged particle beams in background plasmas provides return currents in the opposite direction and interactions between the currents then drive several plasma instabilities involving the longitudinal (electrostatic instabilities) and trans- verse (electromagnetic instability) modes. LÄS MER

  4. 8. Growth and Magnetic Properties of Fe- and FeNi-based Thin Films and Multilayers

    Författare :Anna Maria Blixt; Björgvin Hjörvarsson; Gabriella Andersson; Panagiotis Poulopoulos; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Sputter growth; Permalloy; Multilayer; Superlattice; Magnetism; Fysik; Physics; Fysik;

    Sammanfattning : This thesis concerns the growth and magnetic properties of thin films and multilayers. The samples were grown by magnetron sputtering, and characterized structurally mainly by x-ray diffraction and reflectivity. LÄS MER

  5. 9. Metabolic signals in the regulation of insulin release

    Författare :Jude T Deeney; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :insulin-secreting cells; glucose metabolism; ATP ADP ratio; cytoplasmic free Ca2 concentration; long-chain acyl-CoA; protein kinase C; insulin secretion; serotonin release; permeabilized cells; intracellular Ca2 handling; exocytosis;

    Sammanfattning : In the present thesis, an attempt was made to elucidate the role of some of the glucose-induced intracellular metabolic effector signals in insulin secretion and to develop new applications that will enable further investigations of oscillatory signalling and secretion from pancreatic ß-cells. The sequence of early metabolic and ionic events was examined in clonal pancreatic insulin secreting cells (HIT) in response to glucose stimulation. LÄS MER

  7. 10. Novel measure of olfactory bulb function in health and disease

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

    Sammanfattning : Present neuroimaging techniques are capable of recording the neural activity from all over the brain but the olfactory bulb (OB). The OB is the first olfactory processing stage of the central nervous system and the site of insult in several neurological disorders, particularly Parkinson’s disease (PD). LÄS MER