Sökning: "greger"

Visar resultat 21 - 25 av 70 avhandlingar innehållade ordet greger.

1. 21. NMR diffusion studies on lyotropic liquid crystalline systems

   Författare :Greger Orädd; Frank Volke; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Diffusion; pulsed field gradient; liquid crystalline systems; lipid lateral diffusion; cubic phases; peptide-lipid interactions; hydrophobic mismatch; permeability;

   Sammanfattning : The pulsed field gradient fourier transform nuclear magnetic resonance (PFG-FTNMR) method to measure translational diffusion coefficients in multicomponent systems has been applied to amphiphilic molecules forming liquid crystalline phases.By analyzing the concentration dependence of the diffusion coefficients of water and amphiphile in a micellar system of N,N-dimethyldodecy lamine oxide (DDAO) in water it was possible to conclude that the micelles formed were polydisperse in size and shape. LÄS MER

3. 22. Smart Homes and User Values : Long-term evaluation of IT-services in Residential and Single Family Dwellings

   Författare :Greger Sandström; Ulf Keijer; Brian Atkin; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; accessibility; developer; dwelling; construction process; evaluation; home; housing; information technology; intelligent building; long-term; model; post-occupancy evaluation; resident; service delivery; smart home; trust; usability; usefulness; user; user evaluation; user experience; user value; Architecture; Arkitektur;

   Sammanfattning : Do residents find value in smart home functions? How should these functions be designed to offer user benefit? These were the governing questions of this study that involved nearly 200 families in three different housing projects during five years of occupancy. The housing units were equipped with advanced smart homes solutions, electronic and digital devices to control them, and a set of functions to increase comfort, safety and security in the homes. LÄS MER

4. 23. A Matter of Amusement : The Material Culture of Philipp Hainhofer’s Games in Early Modern Princely Collections

   Författare :Greger Sundin; Johan Eriksson; Johan Cederlund; Lars Ljungström; Uppsala universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Philipp Hainhofer; Augsburg; Kunstkammer; art cabinet; material culture studies; late Renaissance games; early modern games; boardgames; card games; Ulrich Baumgartner; Gustavus Adolfus art cabinet; Pomeranian art cabinet; games casket; Duke August II of Brunswick-Lüneburg; Gustavus Selenus; Konstvetenskap; History of Art;

   Sammanfattning : Games were important to the Augsburg art agent Philipp Hainhofer (1578-1647), and this ludic category was included in most of his art cabinets, procured over period of thirty years during the first half of the seventeenth century. It offered amusement (Kurzweil) as part of an overall ambition for the cabinets to be of service and use (“nutzen vnd dienst”). LÄS MER

5. 24. Pair production, vacuum birefringence and radiation reaction in strong field QED

   Författare :Greger Torgrimsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; worldline instantons; lightfront quantisation; radiation reaction; vacuum birefringence; nonperturbative pair production;

   Sammanfattning : In this thesis we consider three QED phenomena in strong electromagnetic fields: Schwinger pair production, vacuum birefringence and radiation reaction. We study electron-positron pair production in a variety of field configurations and, using complex worldline instantons, reveal new insights into the case of fields with lightlike inhomogeneities. LÄS MER

7. 25. Quantum and classical radiation reaction from lightfront QED

   Författare :Greger Torgrimsson; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : In this thesis I will study the motion of a radiating electron in a background field. Due to the existence of unphysical solutions to the equation of motion derived in classical electrodynamics, several alternative classical equations have been proposed. LÄS MER