Sökning: "Martin Nilsson"

Visar resultat 11 - 15 av 50 avhandlingar innehållade orden Martin Nilsson.

  1. 11. Computational complexity of physical models : sandpile dynamics and parallel quantum computation

    Författare :Martin Nilsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER

  3. 12. Essays on Health Shocks and Social Insurance

    Författare :Martin Nilsson; Per Johansson; Johan Vikström; Lars Hultkrantz; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Health shocks; Socioeconomic status; Social insurance; Social costs; Economics; Nationalekonomi;

    Sammanfattning : This thesis consists of four self-contained essays.Essay 1 (with Petter Lundborg and Johan Vikström): This paper provides new evidence on heterogeneity in the impact of health shocks by using register-based data on the entire population of Swedish workers. LÄS MER

  4. 13. Fast Numerical Techniques for Electromagnetic Problems in Frequency Domain

    Författare :Martin Nilsson; Per Lötstedt; Abderrahmane Bendali; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fast Multipole Method; Minimal Residual Interpolation; Sparse Approximate Inverse preconditioning; Method of Moments; fast solvers; iterative methods; multiple right-hand sides; error analysis; Numerical Analysis; Numerisk analys;

    Sammanfattning : The Method of Moments is a numerical technique for solving electromagnetic problems with integral equations. The method discretizes a surface in three dimensions, which reduces the dimension of the problem with one. A drawback of the method is that it yields a dense system of linear equations. LÄS MER

  5. 14. Mathematical Models of Molecular Evolution

    Författare :Martin Nilsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; dynamic fitness landscapes; quasispecies; error thresholds; evolved mutation rates; evolution in dynamic environments;

    Sammanfattning : This thesis deals with mathematical models of Darwinian evolution in populations of simple living organisms. We study models which describe how the representation of different gene sequences in the population is affected by the fundamental forces of evolutionary processes, such as selection pressure, the mutation rate and the time dynamics of the underlying fitness landscape. LÄS MER

  7. 15. The role of physical activity on bone density and bone geometry in men

    Författare :Martin Nilsson; Göteborgs universitet; []
    Nyckelord :bone mineral density; bone geometry; trabecular microarchitecture; physical activity; men;

    Sammanfattning : THE ROLE OF PHYSICAL ACTIVITY ON BONE DENSITY AND BONE GEOMETRY IN MEN Introduction: Several studies indicate that peak bone mass, reached during the third decade in life, is an important determinant of osteoporosis later in life. Physical activity with dynamic loading of the bone is an important determinant of peak bone mass. LÄS MER