Sökning: "Nordenfelt"

Visar resultat 1 - 5 av 29 avhandlingar innehållade ordet Nordenfelt.

  1. 1. Self Oscillations and Cooling of Carbon Based NEMS Devices

    Författare :Anders Nordenfelt; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nano electro-mechanics; carbon nanotubes;

    Sammanfattning : We investigate the electromechanical properties of a number of system geometries featuring a doubly clamped Carbon Nanotube or Graphene sheet with a deflection sensitive resistance and an electronic feedback in the form of a Lorentz force or an electrostatic attraction. The nanotube is subjected to a constant current- or voltage bias and it is shown that when the electro-mechanical coupling exceeds a certain critical value the system becomes unstable to self-excitations of the mechanical vibrations accompanied by oscillations in the voltage drop and current through the nanotube. LÄS MER

  3. 2. Hereditary Angioedema in Sweden : a National Project

    Författare :Patrik Nordenfelt; Jan Fredrik Björkander; Carl-Fredrik Wahlgren; Mats Nilsson; Hilary J. Longhurst; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : Background: Hereditary angioedema (HAE) due to C1-inhibitor deficiency, type I and II, is a rare disease with an estimated prevalence of 1/50,000. Angioedema in the larynx can be life threatening and angioedema in the abdomen and skin can give severe and disabling pain. Data on patients with HAE in Sweden were scarce before our study. LÄS MER

  4. 3. Phagocytosis by neutrophils - studies on phagosome dynamics and membrane traffic modulation by Streptococcus pyogenes

    Författare :Pontus Nordenfelt; Infektionsmedicin; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; fluorescence microscopy; membrane traffic; neutrophil; Streptococcus pyogenes; phagosome; phagocytosis;

    Sammanfattning : Neutrophils are our most numerous and deadly white blood cells and without them we would succumb quickly to infections by pathogens. The main mechanism that the neutrophils employ for our protection is phagocytosis, where they eat and enclose their target inside a membrane-bound organelle, the phagosome. LÄS MER

  5. 4. Galectin-8 specificity to cells: from broad outside to fine inside

    Författare :Susanne Nordenfelt; immunologi och glykobiologi - MIG Avdelningen för mikrobiologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Biomedical sciences; Biomedicinska vetenskaper; Intracellular targeting; Sialic acid; Galectin fine specificity;

    Sammanfattning : Glycobiology is the world of sugars: how they are made, what they look like, and what they do. Despite the importance of glycan structures in life, knowledge has been hampered due to their inherent complexity. LÄS MER

  7. 5. Mental health : a philosophical analysis

    Författare :Per-Anders Tengland; Lennart Nordenfelt; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Health; mental health; positive mental health; acceptable mental health; ill health; normality; ability; mental ability; ability to co-operate; practical rationality; measuring mental health; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

    Sammanfattning : The present dissertation is an attempt to analyze, philosophically, the notion of "positive mental health". In doing so the author presents a number of suggestions found in the literature. The discussion of these suggestions leads to a number of general conclusions. LÄS MER