Sökning: "appearing"

Visar resultat 16 - 20 av 259 avhandlingar innehållade ordet appearing.

  1. 16. Error Estimation and Adaptive Methods for Molecular Dynamics

    Författare :Ashraful Kadir; Anders Szepessy; Emanuel Rubensson; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This  thesis consists of two  papers that  concern error estimates for the Born-Oppenheimer molecular dynamics, and adaptive algorithms for the Car-Parrinello and Ehrenfest molecular dynamics. In Paper I, we study error estimates for Born-Oppenheimer molecular dynamics with  nearly crossing potential  surfaces. LÄS MER

  3. 17. Real and complex operator norms

    Författare :Natalia Sabourova; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Matematik; Mathematics;

    Sammanfattning : Any bounded linear operator between real (quasi-)Banach spaces T : X ® Y has a natural bounded complex linear extension TC : XC ® YC defined by the formula TC(x+iy)=Tx+iTy for x,yÎX, where XC and YC are so called reasonable complexifications of X and Y, respectively. We are interested in the exact relation between the norms of the operators TC and T. LÄS MER

  4. 18. It Breaks a Man's Heart - Socioeconomic Differences in the Onset of Cardiovascular Disease in Contemporary Sweden

    Författare :Tina Hannemann; Centrum för ekonomisk demografi; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Cardiovascular disease; socioeconomic status; occupational stress; income attainment; occupational class; immigration; intermarriage; indirect impact pathways;

    Sammanfattning : This doctoral thesis investigates the relationship between socioeconomic status and the onset of cardiovascular disease in a contemporary population of natives and foreign-born individuals in Sweden. The complexity of individual socioeconomic characteristics and the interrelationship with other cardiovascular risk factors is the focus of the studies in this thesis. LÄS MER

  5. 19. Localization of N=2 Field Theories: a Twisted Path Across Four Manifolds

    Författare :Lorenzo Ruggeri; Guido Festuccia; Stefano Cremonesi; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Supersymmmetry; gauge theories; localization;

    Sammanfattning : Supersymmetric quantum field theories provide a framework where certain physical observables can be computed exactly. In those cases, one not only has control over perturbative contributions but also over non-perturbative contributions. LÄS MER

  7. 20. Estimation of wood fibre length distributions from censored mixture data

    Författare :Ingrid Svensson; Sara Sjöstedt - de Luna; Lennart Bondesson; Aila Särkkä; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; censoring; fibre length distribution; identifiability; increment core; length bias; mixture; stochastic EM algorithm; Mathematical statistics; Matematisk statistik;

    Sammanfattning : The motivating forestry background for this thesis is the need for fast, non-destructive, and cost-efficient methods to estimate fibre length distributions in standing trees in order to evaluate the effect of silvicultural methods and breeding programs on fibre length. The usage of increment cores is a commonly used non-destructive sampling method in forestry. LÄS MER