Search for dissertations about: "Geometric structure"

Showing result 11 - 15 of 186 swedish dissertations containing the words Geometric structure.

  2. 11. Probing molecular adsorbates with core level spectroscopies : Electronic structure and bonding models

    Author : Alexander Föhlisch; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; Physics; Fysik; fysik; Physics;

    Abstract : Resonantly excited X-ray emission spectroscopy has been applied to study the valence electronic structure of molecular adsorbates in an atom specific and orbital symmetry selective manner. In combination with ab initio cluster calculations, electronic structure and bonding models have been derived. READ MORE

  4. 12. Geometric Discretization in Shape analysis

    Author : Erik Jansson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; compressible fluids; diffeomorphisms; residual neural networks; quantization; machine learning; Shape analysis;

    Abstract : Discretizations in shape analysis is the main theme of this licentiate thesis, which comprises two papers.  The first paper considers  the problem of finding a parameterized time-dependent vector field that warps an initial set of points to a target set of points. READ MORE

  5. 13. Entanglement and Quantum Computation from a Geometric and Topological Perspective

    Author : Markus Johansson; Marie Ericsson; Jens Eisert; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Quantum Information; Geometric Phases; Topological Phases; Entanglement; Quantum Computation;

    Abstract : In this thesis we investigate geometric and topological structures in the context of entanglement and quantum computation.A parallel transport condition is introduced in the context of Franson interferometry based on the maximization of two-particle coincidence intensity. READ MORE

  6. 14. A Treatise on the Geometric and Electronic Structure of Clusters : Investigated by Synchrotron Radiation Based Electron Spectroscopies

    Author : Andreas Lindblad; Olle Björneholm; Gunnar Öhrwall; Maxim Tchaplyguine; Paolo Milani; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Cluster; nanoparticle; Heterogeneous; Homogeneous; Mixed; Cluster production methods; co-expansion; pick-up; doping; Cluster geometry; radial segregation; Interatomic Coulombic Decay; ICD; Auger electron spectroscopy; AES; X-ray photoelectron spectroscopy; XPS; Ultra-violet spectroscopy; UPS; Noble gas; Rare gas; Ne; Ar; Kr; Xe; Ammonia; NH3; Sulphur hexafluoride; SF6; MAX-lab; BESSY; Physics; Fysik;

    Abstract : Clusters are finite ensembles of atoms or molecules with sizes in the nanometer regime (i.e. nanoparticles). This thesis present results on the geometric and electronic structure of homogeneous and heterogeneous combinations of atoms and molecules. READ MORE

  7. 15. QSBMR Quantitative Structure Biomagnification Relationships : Studies Regarding Persistent Environmental Pollutants in the Baltic Sea Biota

    Author : Katrin Lundstedt-Enkel; Jan Örberg; Per Larsson; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Biomagnification; Multivariate modelling of environmental data; Transport of contaminants; Environmental toxicology; Biologi; Biology; Biologi;

    Abstract : I have studied persistent environmental pollutants in herring (Clupea harengus), in adult guillemot (Uria aalge) and in guillemot eggs from the Baltic Sea. The studied contaminants were organochlorines (OCs); dichlorodiphenyltrichloroethanes (DDTs), polychlorinated biphenyls (PCBs), hexachlorobenzene (HCB), hexachlorocyclohexanes (HCHs), and brominated flame retardants (BFRs); polybrominated diphenylethers (PBDEs) and hexabromocyclododecane (HBCD). READ MORE