Sökning: "Density"

Visar resultat 11 - 15 av 4601 avhandlingar innehållade ordet Density.

  1. 11. STM studies of charge density waves

    Författare :Inger Ekvall; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; tungsten tips; transition metal dichalcogenides; charge density waves; scanning tunneling microscopy spectroscopy;

    Sammanfattning : .... LÄS MER

  3. 12. Compact sprawl : Exploring public open space and contradictions in urban density

    Författare :Alexander Ståhle; Lars Marcus; Michael Batty; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Spatial morphology; Urban design; Public open space; Urban density; Landscape planning; Architecture; Arkitektur;

    Sammanfattning : Twentieth century urbanization has left a tremendous footprint on the globe. It is generally speaking a spread out fragmented suburban and exurban landscape continuously growing according to what has been called sprawl-like development, increasing energy and automobile dependency, challenging urban sustainability. LÄS MER

  4. 13. Physical activity, bone density, and fragility fractures in women

    Författare :Undis Englund; Ulrika Pettersson Kymmer; Peter Nordström; Gustaf Bucht; Karl Obrant; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; physical activity; bone density; neuromuscular function; fragility fractures; women; Geriatrics and medical gerontology; Geriatrik och medicinsk gerontologi; Geriatrics; geriatrik;

    Sammanfattning : Scandinavia has among the highest incidence of fragility fractures in the world. The reasons for this are unknown, but might involve differences in genetic and/or environmental factors, such as sunlight exposure and levels of physical activity. LÄS MER

  5. 14. Density Functional Theory in Computational Materials Science

    Författare :Jorge Mario Osorio Guillén; Rajeev Ahuja; Börje Johansson; Bruce N. Harmon; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Density Functional Theory; High Pressure; Phase Transitions; Elastic Properties; Lithium Batteries; Dilute Magnetic Semiconductors; Fysik; Physics; Fysik;

    Sammanfattning : The present thesis is concerned to the application of first-principles self-consistent total-energy calculations within the density functional theory on different topics in materials science. Crystallographic phase-transitions under high-pressure has been study for TiO2, FeI2, Fe3O4, Ti, the heavy alkali metals Cs and Rb, and C3N4. LÄS MER

  7. 15. Foundation of Density Functionals in the Presence of Magnetic Field

    Författare :Andre Laestadius; Michael Benedicks; Trygve Helgaker; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Current density functional theory; Hohenberg-Kohn theorems; paramagnetic current density functionals; Kohn-Sham theory; Levy-Lieb functional; variational principle; N-representable; degeneracy; Mathematics; Matematik;

    Sammanfattning : This thesis contains four articles related to mathematical aspects of Density Functional Theory.In Paper A, the theoretical justification of density methods formulated with current densities is addressed. It is shown that the set of ground-states is determined by the ensemble-representable particle and paramagnetic current density. LÄS MER