Sökning: "Fredrik Andersson"

Visar resultat 16 - 20 av 73 avhandlingar innehållade orden Fredrik Andersson.

  1. 16. On Curvature-Free Connections and Other Properties of the Lanczos Spinar

    Författare :Fredrik Andersson; James Vickers; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : In this thesis we study various properties of the Lanczos spinor. The results include an algebraic classification scheme for symmetric (3,1)-spinors, a link between Lanczos potentials of the Weyl spinor and the spin coefficients in certain classes of spacetimes, an existence proof for the Lanczos potential of a general Weyl candidate that is much simpler than those previously known and the existence of a symmetric potential HABA'B' of an arbitrary symmetric (3,1)-spinor LABCA' in Einstein spacetimes according tothe equation LABCA' = ∇(AB' HBC)A'B'. LÄS MER

  3. 17. Relativistic runaway electrons in tokamak plasmas

    Författare :Fredrik Andersson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; two-way diffusion equation; runaway electron;

    Sammanfattning : .... LÄS MER

  4. 18. Runaway electrons in tokamak plasmas

    Författare :Fredrik Andersson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; tokkamak disruption; runaway electron; two-way diffusion equation;

    Sammanfattning : .... LÄS MER

  5. 19. The Dynamics of Requirements and Product Concept Management A Product Modelling Approach

    Författare :Fredrik Andersson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; requirements management; functional representation; product modelling; rationale; design theory and methodology; product development;

    Sammanfattning : Product development is in many respects the process of identifying and envisaging needs and bringing those needs into life. To make it challenging, the competition forces companies to continuously reduce development and manufacturing cost while increasing customer satisfaction. LÄS MER

  7. 20. The international diffusion of new chemical entities : A cross-national study of the determinants of differences in drug lag

    Författare :Fredrik Andersson; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; International diffusion; Drug Jag; New chemical entities; Drugs; Determinants of diffusion; Econometric analysis; Cross-national; NCEs; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

    Sammanfattning : The two main objectives of this thesis are to make a general contribution to the understanding of the international diffusion of new chemical entities (NCEs) and to improve the research methods by applying econometric methodology.The study is based on a data base including all 553 NCEs introduced in Sweden during the period 1960-1987 and their introductions in France, West Germany, Italy, the United Kingdom, the United States and Norway. LÄS MER