Search for dissertations about: "SNAP"

Showing result 6 - 10 of 54 swedish dissertations containing the word SNAP.

  2. 6. Single Phase Active Power Factor Correction Converters - Methods for Optimizing EMI, Performance and Costs

    Author : Supratim Basu; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Antenna Factor; Diode Recovery Time; Harmonic currents; EMI; Quasi Park; Snap Factor; PFC;

    Abstract : In this thesis, front-end solutions with single-phase power factor correction (PFC) capability are studied. The reduction of current harmonics using various PFC techniques is investigated and related to the EN 61000-3-2 standard. READ MORE

  4. 7. Cycles of voles, predators, and alternative prey in boreal Sweden

    Author : Birger Hörnfeldt; S. Erlinge; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; 3-4 year cycles; Clethrionomys glareolus; Clethrionomys rufocanus; Microtus agrestis; snap-trapping; rate of change; population regulation; delayed density-dependence; time-lag mechanism; seasonality; predation; food; predator avoidance; foraging behaviour; Aegolius funereus; nest boxes; numerical response; nomadism; Vulpes vulpes; Sarcoptes scabiei vulpes; Lepus timidus; Francisella tularensis; Tetraonidae; hunting statistics; zooekologi; Animal Ecology;

    Abstract : Bank voles, grey-sided voles, and field voles had synchronous 3-4 year density cycles with variable amplitudes which averaged about 200-fold in each species. Cycles of vole predators (red fox and Tengmalm's owl), and their (foxes') alternative prey (mountain hare and forest grouse) lagged behind the vole cycles. READ MORE

  5. 8. Roles of SNAP-25 isoforms in activity-dependent long-term synaptic plasticity

    Author : Muhammad Irfan; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : SNARE proteins, SNAP-25, syntaxin 1A and VAMP2 constitute the functional units which join together to form the core SNARE complex. The SNARE complex carries out the vital function of membrane fusion of intracellular vesicles with plasma membranes, leading to the release of neurotransmitters in brain neuronal circuits and of hormones in endocrine glands. READ MORE

  6. 9. SNAP-25 and Cdk5 as exocytotic regulators : consequences for synaptic function and insulin release

    Author : Jenny Johansson; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : The process by which cells release substances through fusion of vesicles with the plasma membrane is called exocytosis. Regulated exocytosis needs to be tightly controlled in order to respond to the large variation in stimuli and demands for release of neurotransmitters, peptides and hormones. READ MORE

  7. 10. Studies of SNAP-25 in regulated membrane fusion : metabolic consequences and tuning of intracellular Ca(2+) dynamics in beta cells

    Author : Teresa Daraio; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Increased release of insulin is usually regarded as a symptom of metabolic syndrome, contributing to insulin resistance in peripheral organs thus affecting glucose and insulin homeostasis. The existing animal models to address the metabolic syndrome are currently not optimal. READ MORE