Sökning: "diffuse reflection"

Visar resultat 1 - 5 av 21 avhandlingar innehållade orden diffuse reflection.

1. 1. Diffuse Optical Spectroscopy and Imaging of Turbid Media

   Författare :Can Xu; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; upconverting nanoparticles; luminescence; fluorescence; inverse problem; diffuse reflection spectroscopy; biomedical optics; photon migration; biomedical imaging; gas spectroscopy; medical diagnostics; tomography; Fysicumarkivet A:2013:Xu;

   Sammanfattning : This thesis deals with optical spectroscopy and imaging of complex and strongly scattering turbid media. Focus is mainly placed on three topics, being i) diffuse optical spectroscopy of choroidal tumors, ii) gas spectroscopy in scattering materials using the GASMAS (gas in scattering media absorption spectroscopy) technique, and iii) luminescence diffuse optical imaging and tomography of tissues. LÄS MER

3. 2. A New Model for Room Acoustic Prediction and Auralization

   Författare :Bengt-Inge Dalenbäck; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; diffuse reflection; cone-tracing; virtual reality; room acoustic prediction; binaural simulation; room acoustics; Ambisonic; auralization;

   Sammanfattning : The development of two room acoustic prediction models and auralization methods are described. The first prediction model is a combination of two well known algorithms with some extensions; the image source model and ray-tracing. LÄS MER

4. 3. Two Problems on Existence and Approximation Related to the Boltzmann Equation

   Författare :Vladislav Panferov; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Boltzmann equation; Povzner type models; diffuse reflection; discrete-velocity models; existence for large data; weak compactness; consistency; convergence; diffuse reflection;

   Sammanfattning : In this thesis, two different types of problems related to the Boltzmann equation of kinetic theory are studied. The first part is devoted to establishing consistency and convergence for discrete-velocity models of the Boltzmann equation. For a new such model, introduced by the author jointly with A. LÄS MER

5. 4. Astrochemical Surface Science: Water Desorption from Nanostructured Graphite

   Författare :Anna Clemens; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; intercalation; temperature programmed desorption; diffuse reflection; geometrical resonances; water ice; ultra high vacuum;

   Sammanfattning : To date, around 180 different molecules have been identified in the interstellar medium (ISM). Some of them form molecular ices on cold interstellar dust grain surfaces. An interstellar dust grain particle is in the order of nanometres in size and is usually composed of a carbonaceous or silicatious grain core. LÄS MER

7. 5. Some Problems on Iterated Maps and Kinetic Equations

   Författare :Lennart Falk; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; unimodal map; renormalization; superstable orbit; full family; linear Bolzmann equation; growth rates in Lp; stationary Bolzmann equation; existence and uniqueness; diffuse boundary reflection; convex boundary; measure-valued solution; growth rates in Lp;

   Sammanfattning : .... LÄS MER