Sökning: "Relaxation response"

Visar resultat 6 - 10 av 141 avhandlingar innehållade orden Relaxation response.

  1. 6. Dielectric Relaxation in Dielectric Mixtures

    Författare :Enis Tuncer; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : In this thesis dielectric properties of both ideal composite structures and polymeric composite materials were investigated. Numerical calculations were performed to simulate frequency response of interfacial polarization using the finite element method in two dimensions. LÄS MER

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

    Författare :Mikael Enelund; Chalmers tekniska högskola; []
    Nyckelord :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;

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

  4. 8. Bending and Mending the Neurosignature : Frameworks of influence by flotation-REST (Restricted Environmental Stimulation Technique) upon well-being in patients with stress related ailments

    Författare :Sven Åke Bood; Torsten Norlander; Gun Nordström; Jarl Risberg; Karlstads universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Attention-placebo; Burn-out; Depression; Flotation-REST; Pain; Prolactin; Relaxation response; Stress; Therapy; Psychology; Psykologi; Psykologi; Psychology;

    Sammanfattning : The overarching purpose of the current thesis was to assess the long term effects of a treatment program involving flotation-REST for the experience of pain, from the point of view of variables connected with Melzack´s neuromatrix theory, and to examine the extent of a potential attention-placebo effect in connection with flotation-REST.The first study (Paper I) aimed to investigate long-term effects of flotation-REST four months after treatment. LÄS MER

  5. 9. Microscopic Mechanisms of the Formation, Relaxation and Recombination of Excitons in Two-Dimensional Semiconductors

    Författare :Samuel Brem; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; relaxation dynamics; 2D materials; density matrix formalism; excitons; exciton-phonon interaction; Bloch equations;

    Sammanfattning : Monolayers of Transition Metal Dichalcogenides (TMDs) present a giant leap forward towards the realization of semiconductor devices with atomic scale thickness. As a natural consequence of their two-dimensional character TMDs exhibit a reduced dielectric screening, leading to the formation of unusually stable excitons, i.e. LÄS MER

  7. 10. Studies of Dielectric Relaxation in Solid Polymers and Composites

    Författare :Mohsen Safari Ardi; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dielectric permittivity; time-domain dielectric relaxation; composite; carbon black; poly vinylidene fluoride ; interfacial polarization; poly vinyl chloride ; coated carbon fibre; epoxy; poly methyl methacrylate ; nitrile butadiene rubber; ethylene-vinyl acetate copolymer; polyamide 6;

    Sammanfattning : Non-linear characteristics of homogeneous solid polymers and solid polymer-based composites have been studied both experimentally and theoretically. In particular experimental studies of non-linear dielectric response of six homogeneous solid polymeric materials and the influence of the composition on the properties of solid polymer-based composites with high dielectric permittivities have been carried out and a theoretical study of dipole-dipole interaction in solids based on a formulation due to P. LÄS MER