Sökning: "Scattering Theory"

Visar resultat 21 - 25 av 266 avhandlingar innehållade orden Scattering Theory.

1. 21. Multi­-Scattering: Computational light transport in turbid media

   Författare :Joakim Jönsson; Förbränningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Monte carlo simulations; scattering in tissues; particulate scattering; GPU; CUDA; Fysicumarkivet A:2021:Jönsson;

   Sammanfattning : This thesis presents and describes the development of an online freely accessible software called Multi-Scattering for the computational modeling of light propagation in scattering and absorbing media. The model is based on the use of the Monte Carlo method, where billions of photon packets are being launched and tracked through simulated cubic volumes. LÄS MER

3. 22. Elastic and inelastic scattering effects in conductance measurements at the nanoscale : A theoretical treatise

   Författare :Peter Berggren; Jonas Fransson; Wolfgang Belzig; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Scattering theory; Scanning tunneling microscopy; tunnel junctions; molecular graphene; paramagnetic molecules; spin interaction; nano electromechanical system; Josephson junction; superconductivity; chaos; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

   Sammanfattning : Elastic and inelastic interactions are studied in tunnel junctions of a superconducting nanoelectromechanical setup and in response to resent experimental superconducting scanning tunneling microscope findings on a paramagnetic molecule. In addition, the electron density of molecular graphene is modeled by a scattering theory approach in very good agreement with experiment. LÄS MER

4. 23. Thermoelectric Effects and Single Electron Sources in Mesoscopic Transport; a Scattering Approach

   Författare :Sara Kheradsoud; NanoLund: Centre for Nanoscience; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Thermoelectricity; Single electron source; scattering theory; Mesoscopic physics; Fysicumarkivet A:2019:Kheradsoud;

   Sammanfattning : This thesis concerns the theoretical analysis of thermoelectric transport properties and single electron sources in mesoscopic conductors. Wepropose two types of thermoelectric heat engines and analyze them with thehelp of performance quantifiers. LÄS MER

5. 24. Colloidal interactions obtained from total internal reflection microscopy measurements and scattering data

   Författare :Moheb Nayeri; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; total internal reflection microscopy; colloidal stability; van der Waals interaction; Debye length; surfactants; depletion; scattering; colloidal stability;

   Sammanfattning : The scattering of radiation can be used to extract information about the interactions between colloidal (10^{-7}-10^{-3} cm radius) particles suspended in liquids. As colloidal interactions incorporate entropic effects they are weak and while system specific they are governed by a number of general mechanisms. LÄS MER

7. 25. Integral Identities for Passive Systems and Spherical Waves in Scattering and Antenna Problems

   Författare :Anders Bernland; Institutionen för elektro- och informationsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dispersion relations; sum rules; physical limitations; Herglotz functions; electromagnetic scattering; antenna theory; spherical wave expansions; antenna measurements; propagation channel measurements;

   Sammanfattning : Sum rules and physical limitations within electromagnetic theory and antenna theory have received significant attention in the last few years. However, the derivations are often relying on application specific and sometimes unsupported assumptions, and therefore a mathematically rigorous and generally applicable approach seems timely. LÄS MER