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Visar resultat 11 - 15 av 187 avhandlingar innehållade ordet längd.

  1. 11. On Long Proofs of Simple Truths

    Författare :Kilian Risse; Per Austrin; Johan Håstad; Jakob Nordström; Benjamin Rossman; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Computational Complexity; Lower Bounds; Proof Complexity; Datalogi; Computer Science;

    Sammanfattning : Propositional proof complexity is the study of certificates of infeasibility. In this thesis we consider several proof systems with limited deductive ability and unconditionally show that they require long refutations of the feasibility of certain Boolean formulas. LÄS MER

  3. 12. Electron beam sizes and lifetimes at MAX II and MAX III

    Författare :Anders Rosborg; Lunds universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Electron accelerator; Storage ring; Synchrotron light source; Synchrotron radiation; Electron beam profile; Emittance; Beam size; Fysicumarkivet A:2012:Hansson; Lifetime; Bunch length; Landau cavities;

    Sammanfattning : The MAX II and MAX III synchrotron light sources at MAX-lab provide synchrotron radiation for experiments in a wide variety of research fields. The synchrotron radiation is emitted by ultra-relativistic electrons circulating in electron storage rings. LÄS MER

  4. 13. Consequences of Traffic Casualties in Relation to Traffic-Engineering Factors - An Analysis in Short-term and Long-term Perspectives

    Författare :Monica Berntman; Trafik och väg; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Police and Hospital Data; Traffic Casualties; Consequences for Society and Individulas; in Short-term and Long-term Perspectives; Health Index; Traffic-Engineering Factors; ISS; Potential Traffic Safety Measures; Predictors; Road transport technology; Vägtransportteknik;

    Sammanfattning : The over-arching objectives of this thesis were to formulate a method to describe the consequences of traffic casualties, and to explain the influence of different traffic engineering factors on these consequences for society and individuals over time. A more detailed objective was to examine whether available short-term indicators can be used to predict consequences in a long-term perspective. LÄS MER

  5. 14. Beyond averages – some aspects of how to describe a heterogeneous material, mechanical pulp, on particle level

    Författare :Olof Ferritsius; Birgitta A. Engberg; Per Engstrand; Mats Rundlöf; Øyvind Weiby Gregersen; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Visualisation; Uniformity; Distributions; Independent common factors; Weighted fibre length; Fibre bonding; Fibrillation; Curl; Wall thickness; Particle analyser characterisation; Raw material; CTMP; Process configuration; Sampling accuracy;

    Sammanfattning : For a more profound understanding of how a process works, it is essential to have a relevant description of the material being processed. With this description, it will be easier to evaluate and control processes to produce more uniform products with the right properties. LÄS MER

  7. 15. Övervikt/fetma hos barn, ungdomar och unga vuxna i relation till vikt, viktutveckling och kariesförekomst

    Författare :Christina Celsing Fåhraeus; Jönköping University; []
    Nyckelord :children; youth; overweight; obesity; weight development; body mass index; isoBMI; caries risk products; caries.; barn; ungdomar; övervikt; fetma; viktutveckling; body mass index; isoBMI; karies risk produkter; karies;

    Sammanfattning : Fetma är en av världens snabbast växande sjukdomar och karies är fortfarande en vanlig sjukdom hos barn och ungdomar. Syftet med denna licentiatavhandling har varit att:beskriva frekvensen av övervikt och fetma från födseln till tjugo års ålder.analysera vikt och viktutvecklingen från födseln till vuxen ålder. LÄS MER