Sökning: "code theory"

Visar resultat 6 - 10 av 250 avhandlingar innehållade orden code theory.

  1. 6. Spin ice and demagnetising theory

    Författare :Mikael Twengström; Patrik Henelius; Peter Holdsworth; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Geometrical frustration; spin ice; Monte Carlo simulations; demagnetising theory; special temperatures; Ewald summation; neutron scattering; structure factors; loop algorithms; parallel tempering; frustrated ferromagnets; equilibration issues; long-range interactions; exchange interactions.; Fysik; Physics;

    Sammanfattning : Frustration, or the inability to simultaneously minimise all local interactions is, a phenomenon occurring in a broad number of physical systems. We will in this thesis focus on a class of frustrated ferromagnetic materials called spin ices and how both numerical and experimental techniques can be used to understand their properties. LÄS MER

  3. 7. Att vänja sig till det svenska språket : studier av en individuell skriftspråklig förändring utifrån Olof Bertilssons kyrkobok 1636-1668

    Författare :Solbritt Hellström; Lars-Erik Edlund; Jonas Carlquist; Per-Axel Wiktorsson; Umeå universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Scandinavian languages; strong and weak ties; motivation; Danish language; Swedish language; code theory; individual orthographic code; salience; identity; prestige; accommodation; Nordiska språk; Scandinavian languages; Nordiska språk;

    Sammanfattning : On the annexation of Jämtland by Sweden in 1645, Danish clergymen were allowed to remain on condition that they officiated in the Swedish language.This dissertation investigates the changes in the written language of one of these Danish clergymen and is based on the parish register kept by the Rev. Olof Bertilsson between 1636 and 1668. LÄS MER

  4. 8. Rigorous Simulation : Its Theory and Applications

    Författare :Adam Duracz; Walid Taha; Veronica Gaspes; Kazunori Ueda; Högskolan i Halmstad; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; simulation; verification; interval analysis; validated numerics; hybrid systems; cyber-physical systems;

    Sammanfattning : Designing Cyber-Physical Systems is hard. Physical testing can be slow, expensive and dangerous. Furthermore computational components make testing all possible behavior unfeasible. Model-based design mitigates these issues by making it possible to iterate over a design much faster. LÄS MER

  5. 9. Evaluation of the Load Carrying Capacity of a Steel Truss Railway Bridge : Testing, Theory and Evaluation

    Författare :Jens Häggström; Hans Pétursson; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Engineering; Konstruktionsteknik;

    Sammanfattning : A good deal of resources has been invested in building and maintaining existing infrastructure.Many structures are now becoming old and do not meet the requirements of an increasingtraffic load, or are reaching the end of their lifecycle. LÄS MER

  7. 10. Composite Likelihood Estimation for Latent Variable Models with Ordinal and Continuous, or Ranking Variables

    Författare :Myrsini Katsikatsou; Fan Yang-Wallentin; Irini Moustaki; Karl Gustav Jöreskog; Ruggero Bellio; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; latent variable models; factor analysis; structural equation models; Thurstonian model; item response theory; composite likelihood estimation; pairwise likelihood estimation; maximum likelihood; weighted least squares; ordinal variables; ranking variables; lavaan; Statistics; Statistik;

    Sammanfattning : The estimation of latent variable models with ordinal and continuous, or ranking variables is the research focus of this thesis. The existing estimation methods are discussed and a composite likelihood approach is developed. LÄS MER