Search for dissertations about: "Scattering"

Showing result 16 - 20 of 1374 swedish dissertations containing the word Scattering.

2. 16. Multi­-Scattering: Computational light transport in turbid media

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

   Abstract : 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. READ MORE

4. 17. Laser Diagnostics in Combustion - Elastic Scattering and Picosecond Laser-Induced Fluorescence

   Author : Frederik Ossler; Förbränningsfysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Spray; Picosecond laser; Streak camera; Time resolved; Fluorescence lifetimes; 3 – D flow imaging; 2 - D lifetime imaging; Pressure; Temperature; Hydrogen atoms; Oxygen atoms; 3-pentanone; Acetone; Lorenz-Mie theory; Aerosol; Fysicumarkivet A:1999:Ossler; Scattering; Fysik; Physics; Polycyclic aromatic hydrocarbons.;

   Abstract : Elastic scattering and the Lorenz-Mie (LM) theory in particular is used for the characterization of sub-micron- and micron-sized droplets of organic fuels in sprays and aerosols. Calculations on the Lorenz- Mie theory show that backward-sideward scattered visible radiation can be used for unambiguous detection of ensembles of homogeneous droplets of organic substances with diameters around 1 micrometer (size parameter between 2 and 6). READ MORE

5. 18. Studies of Edge Diffraction and Scattering: Applications to Room Acoustics and Auralization

   Author : Rendell Torres; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; diffraction; virtual environments; scattering; diffusion; architectural acoustics; auralization; virtual reality; room acoustics;

   Abstract : This thesis examines ways of including edge diffraction and surface scattering to improve room acoustics auralization, i.e., the binaural replication of an acoustic environment. The approach combines numerical and psychoacoustical studies to discern what level of computational accuracy is necessary to obtain perceptually adequate replication. READ MORE

6. 19. Modeling of Scattering by Cracks in Anisotropic Solids - Application to Ultrasonic Detection

   Author : Johan Mattsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; elastic wave; ultrasonics; crack; integral equations; transducer; anisotropy; scattering; nondestructive testing;

   Abstract : Elastodynamic wave scattering in anisotropic solids with application to ultrasonic nondestructive testing (NDT) is treated and mathematically modeled in this thesis. The scatterers are infinite strip-like cracks and the solids are homogeneous and linearly elastic with negligible damping. READ MORE

7. 20. Colloidal interactions obtained from total internal reflection microscopy measurements and scattering data

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

   Abstract : 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. READ MORE