Sökning: "elliptical"

Visar resultat 11 - 15 av 66 avhandlingar innehållade ordet elliptical.

1. 11. Morphometric analysis of Cambrian fossils and its evolutionary significance

   Författare :Illiam Jackson; Graham Budd; Jorijntje Henderiks; Richard Mann; Nigel Hughes; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Extended Evolutionary Synthesis; phenotypic plasticity; genetic assimilation; phenotypic accommodation; Agnostus pisiformis; Mackinnonia; elliptical fourier analysis; species concept;

   Sammanfattning : The Extended Evolutionary Synthesis (EES) is currently emerging as a theoretical alternative to the Modern Synthesis (MS) in which to frame evolutionary observations and interpretations. These alternative frameworks differ fundamentally in their understanding of the relative roles of the genotype, phenotype, development and environment in evolutionary processes and patterns. LÄS MER

3. 12. Powerful tool for analysis of systems containing traction point contacts

   Författare :Mikael Törmänen; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rolling and spinning hertzian point contacts; continuously variable transmission CVT ; traction drive variator; complete elliptical integrals; multi-body system MBS ; virtual prototyping;

   Sammanfattning : .... LÄS MER

4. 13. Many-Body effects in Semiconductor Nanostructures

   Författare :Carl-Johan Wesslén; Eva Lindroth; Morten Førre; Stockholms universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; coupled cluster; nanostructure; quantum dot; quantum ring; concentric quantum ring; many body pertubation theory; fysik; Physics;

   Sammanfattning : Low dimensional semiconductor structures are modeled using techniques from the field of many-body atomic physics. B-splines are used to create a one-particle basis, used to solve the more complex many-body problems. LÄS MER

5. 14. Tailored Properties of Ferromagnetic Thin Films

   Författare :Peter Warnicke; Peter Svedlindh; Peter Grünberg; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; micromagnetics; domain wall; vortex; pinning potential; nanowire; spin dynamics; spin transfer torque; magnetic anisotropy; MFM; Permalloy; PMA; magnetic multilayer; Curie temperature; DMS; GaMnAs; magnetic bioseparation; Engineering physics; Teknisk fysik;

   Sammanfattning : Magnetic thin films and patterned nanostructures have been studied with respect to their magnetic properties using SQUID-magnetometry, magnetic force microscopy, electrical measurements, and micromagnetic calculations. Properties of vortex domain walls, trapped in Permalloy nanowires with artificial constrictions, were investigated experimentally and by numerical calculations. LÄS MER

7. 15. Coining Residual Stresses in Aluminium Ship Structures: Experiments and FE- simulations

   Författare :Rutger Ogeman; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : The build-up and redistribution of residual stresses obtained by stress coining of aluminium plates containing a hole have been studied experimentally and numerically. The foil strain gauge technique has been employed to measure strains at the bore of a hole during and after the coining process. LÄS MER