Sökning: "Ulf Olsson"

Visar resultat 11 - 15 av 53 avhandlingar innehållade orden Ulf Olsson.

  1. 11. Heart Rate Variability in Stress-related Fatigue, Adolescent Anxiety and Depression and its Connection to Lifestyle

    Författare :Erik Olsson; Lennart Melin; Ulf Lundberg; Uppsala universitet; []
    Nyckelord :heart rate variability; autonomic nervous system; vagal tone; allostatic load; stress; fatigue; anxiety; depression; continuous performance; attention; cardiovascular risk; lifestyle; physical activity;

    Sammanfattning : Heart rate varies constantly as a consequence of activity in the sympathetic and parasympathetic autonomic nervous systems (SNS and PNS). In short-term recordings, heart rate variability (HRV) is mostly related to the inhibitory activity of the vagal nerves, which are part of the PNS. LÄS MER

  3. 12. Hope and life-struggle : patients' experiences with Transcatheter Aortic Valve Implantation

    Författare :Karin Olsson; Åsa Hörnsten; Ulf Näslund; Jan Mårtensson; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Aortic stenosis; transcatheter aortic valve implantation; experiences; coping; decision-making; health-related quality of life; symptoms; function; omvårdnadsforskning med medicinsk inriktning; Caring Sciences;

    Sammanfattning : The overall aim of this thesis is to explore experiences and self-reported outcomes from Transcatheter Aortic Valve Implantation, TAVI, among people with severe aortic stenosis. The thesis includes four studies. Study I-II are based on interviews performed the day before TAVI and Qualitative Concept Analysis was used for analysis. LÄS MER

  4. 13. “Count on me!” : Mathematical development, developmental dyscalculia and computer-based intervention

    Författare :Linda Olsson; Ulf Träff; Joakim Samuelsson; Lisa Thorell; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; mathematical development; symbolic number processing; Approximate number system; developmental dyscalculia; computer-based intervention; matematisk utveckling; symboliskt nummerprocessande; Approximativa nummersystemet; dyskalkyli; datorbaserad intervention;

    Sammanfattning : A “sense” of number can be found across species, yet only humans supplement it with exact and symbolic number, such as number words and digits. However, what abilities leads to successful or unsuccessful arithmetic proficiency is still debated. LÄS MER

  5. 14. String Theory at the Horizon : Quantum Aspects of Black Holes and Cosmology

    Författare :Martin Olsson; Ulf Danielsson; Lárus Thorlacius; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Theoretical physics; theoretical physics; string theory; black holes; cosmology; de Sitter space; c=1 matrix models; 2D string theory; topological string theory; conifolds; 4D BPS black holes; Gödel universe; closed time-like curves; Teoretisk fysik; Physics; Fysik;

    Sammanfattning : String theory is a unified framework for general relativity and quantum mechanics, thus being a theory of quantum gravity. In this thesis we discuss various aspects of quantum gravity for particular systems, having in common the existence of horizons. LÄS MER

  7. 15. Synthesis and characterization of ferrite based nanocomposites for microwave absorbing applications

    Författare :Richard T. Olsson; Ulf W. Gedde; Lars Klog; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Polymer chemistry; Polymerkemi;

    Sammanfattning : .... LÄS MER