Search for dissertations about: "NATURVETENSKAP Fysik Övrig fysik Beräkningsfysik"

Showing result 1 - 5 of 15 swedish dissertations containing the words NATURVETENSKAP Fysik Övrig fysik Beräkningsfysik.

  1. 1. Searches for Particle Dark Matter Dark stars, dark galaxies, dark halos and global supersymmetric fits

    University dissertation from Stockholm : Department of Physics, Stockholm University

    Author : Pat Scott; Joakim Edsjö; Lars Bergström; Jan Conrad; Dan Hooper; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; dark matter; supersymmetry; gamma rays; dwarf galaxies; stellar evolution; cosmological perturbations; phase transitions; statistical techniques; NATURAL SCIENCES Physics Elementary particle physics Astroparticle physics; NATURVETENSKAP Fysik Elementarpartikelfysik Astropartikelfysik; NATURAL SCIENCES Physics Astronomy and astrophysics Astroparticle physics; NATURVETENSKAP Fysik Astronomi och astrofysik Astropartikelfysik; NATURAL SCIENCES Physics Astronomy and astrophysics Cosmology; NATURVETENSKAP Fysik Astronomi och astrofysik Kosmologi; NATURAL SCIENCES Physics Elementary particle physics; NATURVETENSKAP Fysik Elementarpartikelfysik; NATURAL SCIENCES Physics Other physics Computational physics; NATURVETENSKAP Fysik Övrig fysik Beräkningsfysik; NATURAL SCIENCES Physics Astronomy and astrophysics Formation and development of stars; NATURVETENSKAP Fysik Astronomi och astrofysik Stjärnors bildning och utveckling; NATURAL SCIENCES Physics Astronomy and astrophysics High energy astrophysics; NATURVETENSKAP Fysik Astronomi och astrofysik Högenergiastrofysik; Theoretical Physics; teoretisk fysik;

    Abstract : The identity of dark matter is one of the key outstanding problems in both particle and astrophysics. In this thesis, I describe a number of complementary searches for particle dark matter. READ MORE

  2. 2. Exploring patterns of empirical networks

    University dissertation from Umeå : Umeå University, Department of Physics

    Author : Luis E C Rocha; Petter Holme; Kimmo Kaski; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; complex systems; complex networks; network analysis; empirical networks; air transportation; consumer complaints; information technology; sexual contacts; epidemics; vaccination; NATURAL SCIENCES Physics Other physics Statistical physics; NATURVETENSKAP Fysik Övrig fysik Statistisk fysik; NATURAL SCIENCES Physics Other physics Computational physics; NATURVETENSKAP Fysik Övrig fysik Beräkningsfysik; INTERDISCIPLINARY RESEARCH AREAS Technology and social change; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN Teknik och social förändring; MEDICINE Social medicine Public health medicine research areas Epidemiology; MEDICIN Socialmedicin Folkhälsomedicinska forskningsområden Epidemiologi; TECHNOLOGY Information technology; TEKNIKVETENSKAP Informationsteknik; fysik; Physics; Statistics; statistik; Epidemiology; epidemiologi; Economics; nationalekonomi;

    Abstract : We are constantly struggling to understand how nature works, trying to identify recurrent events and looking for analogies and relations between objects or individuals. Knowing patterns of behavior is powerful and fundamental for survival of any species. READ MORE

  3. 3. Quantum transport and spin effects in lateral semiconductor nanostructures and graphene

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Martin Evaldsson; Igor Zozoulenko; Vidar Gudmundsson; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Electronic transport; Spin related phenomena; Quantum dots; Quantum wires; Two-dimensional electron gas; 2DEG; Graphene; NATURAL SCIENCES Physics Other physics Computational physics; NATURVETENSKAP Fysik Övrig fysik Beräkningsfysik; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Abstract : This thesis studies electron spin phenomena in lateral semi-conductor quantum dots/anti-dots and electron conductance in graphene nanoribbons by numerical modelling. In paper I we have investigated spin-dependent transport through open quantum dots, i.e., dots strongly coupled to their leads, within the Hubbard model. READ MORE

  4. 4. Effects of disorder in metallic systems from First-Principles calculations

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Christian Asker; Igor Abrikosov; Jörg Neugebauer; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Iron; Nickel; Magnesium; Manganese; Molybdenum; Zirconium; Elastic Constants; High pressure; Earth s core; Density-functional theory; Ab-initio; First-Principles; Core-level shifts; Molecular Dynamics; Phonons; Dynamical Instability; NATURAL SCIENCES Physics Condensed matter physics; NATURVETENSKAP Fysik Kondenserade materiens fysik; NATURAL SCIENCES Physics Other physics Computational physics; NATURVETENSKAP Fysik Övrig fysik Beräkningsfysik;

    Abstract : In this thesis, quantum-mechanical calculations within density-functional theory on metallic systems are presented. The overarching goal has been to investigate effects of disorder. In particular, one of the properties investigated is the bindingenergy shifts for core electrons in binary alloys using different theoretical methods. READ MORE

  5. 5. First Principles Studies on Chemical and Electronic Structures of Adsorbates

    University dissertation from Stockholm : KTH

    Author : Wenhua Zhang; Yi Luo; Gianfranco Pacchioni; [2009]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES Chemistry Inorganic chemistry Solid state chemistry; NATURVETENSKAP Kemi Oorganisk kemi Fasta tillståndets kemi; NATURAL SCIENCES Physics Other physics Computational physics; NATURVETENSKAP Fysik Övrig fysik Beräkningsfysik; NATURAL SCIENCES Physics Condensed matter physics Surfaces and interfaces; NATURVETENSKAP Fysik Kondenserade materiens fysik Ytor och mellanytor;

    Abstract : In this thesis, we focus on theoretical study of adsorbates on metal and oxide surfaces that are important for surface chemistry and catalysis. Based on first principles calculations, the adsorption ofCO, NO, NO2, C4H6S2, C22H27SH and other molecules or radicals on nobel metal surfaces (gold and silver) are investigated. READ MORE