Sökning: "closely connected"

Visar resultat 1 - 5 av 213 avhandlingar innehållade orden closely connected.

  1. 1. The complicated struggle to be a support : meanings of being a co-worker, supervisor and closely connected to a person developing burnout

    Författare :Eva Ericson-Lidman; Gunilla Strandberg; Astrid Norberg; Ulla-Carin Hedin; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; burnout; co-workers; supervisors; closely connected; healthcare; phenomenological-hermeneutics; thematic content analysis; the ethical demand; social support; Nursing; Omvårdnad;

    Sammanfattning : The overall aim of this thesis is to illuminate meanings of being a co-worker, supervisor and closely connected to a person developing burnout, and to describe perceptions of signs preceding burnout. The thesis comprises four papers and is based on qualitative data. LÄS MER

  3. 2. Modeling and Control of VSC-HVDC Links Connected to Weak AC Systems

    Författare :Lidong Zhang; Hans-Peter Nee; Alan Wood; KTH; []
    Nyckelord :Control; modeling; multivariable feedback control; HVDC; power systems; stability; subsynchronous torsional interaction; voltage-source converter; weak ac systems;

    Sammanfattning : For high-voltage direct-current (HVDC) transmission, the strength of the ac system is important for normal operation. An ac system can be considered as weak either because its impedance is high or its inertia is low. LÄS MER

  4. 3. Modelling and control of a line-commutated HVDC transmission system interacting with a VSC STATCOM

    Författare :Paulo Fischer de Toledo; Hans-Peter Nee; Gustaf Ohlsson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Keywords : HVDC transmission; LCC – Line-commutated Current-source Converter; STATCOM; VSC – Voltage Source Converter; Space-Vector complex vector ; transfer-function; frequency-domain analysis; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

    Sammanfattning : The interaction of an HVDC converter with the connected power system is of complex nature. An accurate model of the converter is required to study these interactions. The use of analytical small-signal converter models provides useful insight and understanding of the interaction of the HVDC system and the connected system components. LÄS MER

  5. 4. A visually geometric foundation of spinor and twistor algebra

    Författare :Hans Hellsten; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The author’s geometrical interpretation of spinor algebra is formulated in a relativistically covariant way. It is shown how spinor space can be constructed from a space-like hyperplane in Minkowski space. LÄS MER

  7. 5. Structure and Dynamics of the Copper-binding Octapeptide Region in the Human Prion Protein

    Författare :Eva-Stina Riihimäki; Lars Kloo; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Inorganic chemistry; prion protein; copper; molecular dynamics simulation; solvation model; metal ions; coordination; Oorganisk kemi; Inorganic chemistry; Oorganisk kemi;

    Sammanfattning : The copper-binding ability of the prion protein may be closely connected to its function. Identifying the exact function of the prion protein can clarify the underlying mechanism in prion diseases. In this work, the copper-binding octapeptide region in the human prion protein has been studied. LÄS MER