Search for dissertations about: "Dissertation topics"

Showing result 1 - 5 of 105 swedish dissertations containing the words Dissertation topics.

  2. 1. Exact Results in Supersymmetric Field Theories : A dissertation on the defect and deformed

    Author : Erik Widen; Konstantin Zarembo; Nikolay Gromov; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; AdS CFT correspondence; integrability; localization; supersymmetric deformations; Quantum Spectral Curve; defect CFT; one-point functions; Theoretical Physics; Teoretisk fysik;

    Abstract : Quantum field theories (QFTs) are the most precise descriptions of the physical reality that humanity has found. Yet exact predictions are often missing as most computations are notoriously difficult to carry out. One generally resorts to perturbation theory which immediately limits the regime of validity. READ MORE

  4. 2. Modeling and Characterization of nonlinear Materials for Protection of Optical Sensors

    Author : Anders Eriksson; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : This thesis concerns nonlinear materials and experimental techniques for optical power limiting applications. Theoretical models to analyze and simulate related measurements were studied. Two different numerical modeling tools for propagation of optical radiation through optically nonlinear media were developed. READ MORE

  5. 3. Techniques for the determination of the optimal performance of high resolution computerised tomography

    Author : Peter Hammersberg; Holger Reiter; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Techniques to deternine the optimal performance of high resolution computerised tomography (CT) has been studied, that is, optimal data collection parameter settings for the imaging task at issue and its detectability limits.Generally, CT is an X-ray based non-destructive testing method that was developed for medical purposes in the seventies and introduced for industrial applications the latter half of the eighties. READ MORE

  6. 4. Waves and Trajectories in Quantum Dots

    Author : Tomas Lundberg; Joan Martorell; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : This thesis deals with electron transport in low-dimensional semiconductor nanostructures,and in particular, systems with quasi zero-dimensional properties, called quantum dots. These systems are so small that the electron wavelength is comparable to the size of systems, which means that the wave nature of the electrons is of fundamental importance. READ MORE

  7. 5. Conservation of the wood of the Swedish warship Vasa of A.D. 1628. Evaluation of polyethylene glycol conservation programmes

    Author : Birgitta Håfors; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Anti shrink efficiency ASE ; archaeological wet site; dimensional stabilisation; conservation; osmosis; polyethylene glycol PEG ;

    Abstract : The principal aim of this dissertation is to investigate whether or not polyethylene glycol (PEG) has acted as a dimension stabilizing agent of the Vasa wooden material, i.e. READ MORE