Search for dissertations about: "Linear response functions"

Showing result 1 - 5 of 100 swedish dissertations containing the words Linear response functions.

2. 1. Derivation and application of response functions for nonlinear absorption and dichroisms

   Author : Tobias Fahleson; Patrick Norman; Daniel Crawford; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Theoretical spectroscopy; cubic response theory; damped response theory; magnetic circular dichroism; linear birefringence; two-photon absorption; TPA; resonant-inelastic x-ray scattering; RIXS; DALTON program; Teoretisk kemi och biologi; Theoretical Chemistry and Biology;

   Abstract : This thesis is titled ’Derivation and application of response functions for nonlinear absorption and dichroisms’ and was written by Tobias Fahleson at the Division of Theoretical Chemistry & Biology at KTH Royal Institute of Technology in Sweden. It explores and expands upon theoretical means of quantifying a number of nonlinear spectroscopies, including two-photon absorption, resonant inelastic x-ray scattering, Jones birefringence, and magnetic circular dichroism. READ MORE

4. 2. Extending relativistic linear response theory to address solvent effects

   Author : Joel Creutzberg; Beräkningskemi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Response theory; Polarizable embedding; Complex Polarization Propagator; Relativistic effects;

   Abstract : The central aim of this thesis is to derive, implement and test new methods to calculate various types of spectroscopies of compounds containing heavy elements in an aqueous environment. Methods that can target such systems have to consider the following:(i) It is crucial to take relativistic effects into account. READ MORE

5. 3. Fractional Calculus and Linear Viscoelasticity in Structural Dynamics

   Author : Mikael Enelund; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; linear viscoelasticity; convolution integrals; anisotropy; structural modeling; finite elements; material damping; time integration; internal variables; relaxation; fractional calculus; creep; Mittag-Leffler functions;

   Abstract : The use of linear viscoelasticity together with fractional calculus in time-domain structural modeling is studied. Both constitutive and structural aspects are investigated. READ MORE

6. 4. Graphene plasmons in nanostructured environments

   Author : Tobias Wenger; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; nonlocal response; Graphene plasmons; subwavelength electromagnetic scattering; linear response Green s functions;

   Abstract : This thesis explores the combination of electromagnetism with electrons in graphene. Graphene is a one atom thick layer of carbon atoms which contains electrons that exhibit rather special properties in terms of their conduction abilities. READ MORE

7. 5. Nonlinear Structural Identification Using a Multi-Harmonic  Frequency Response Functions

   Author : Vahid Yaghoubi Nasrabadi; Thomas Abrahamsson; Andreas Linderholt; Martin Magnevall; Chalmers; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Nonlinear structure; inverse problem; grey box system identification; finite element model updating; identifiability; Fisher information matrix; multi-harmonic frequency response function; Maskinteknik; Mechanical Engineering;

   Abstract : In industrial structural dynamics problems, linear FE-models commonly serve to represent the global structural behavior. However, when test data are available they often show evidence of nonlinear dynamic characteristics. In that case, an initial linear model may be judged insufficient in representing the dynamics of the structure. READ MORE