Search for dissertations about: "Vlasov"

Showing result 1 - 5 of 19 swedish dissertations containing the word Vlasov.

2. 1. Ecological embedding : stories of back-to-the-land ecopreneurs and energy descent

   Author : Maxim Vlasov; Zsuzsanna Vincze; Karl Johan Bonnedahl; Gail Whiteman; Umeå universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; alternative organising; back-to-the-land; ecological embedding; ecopreneurship; degrowth; critical perspectives on sustainability; ethnography; narrative storytelling; alternativ organisering; den nya gröna vågen; ekologisk inbäddning; ekoprenörskap; kritiska hållbarhetsperspektiv; etnografi; narrativ ansats; berättelser; företagsekonomi; Business Studies; sustainability; hållbarhet; etik; Ethics;

   Abstract : This thesis starts with the premise that to address ecological and climate crises, we need to understand their psychological and cultural roots found in the separation of modern societies from the natural world. This separation permeates mainstream approaches to sustainability that either sustain business-as-usual of the unbridled economic growth, or reform it with greener markets and technologies. READ MORE

4. 2. On the Einstein-Vlasov system

   Author : Mikael Fjällborg; Alexander Bobylev; Markus Kunze; Karlstads universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Einstein-Vlasov system; finite extension; monotone functions; MATHEMATICS; MATEMATIK; Matematik; Mathematics;

   Abstract : In this thesis we consider the Einstein-Vlasov system, which models a system of particles within the framework of general relativity, and where collisions between the particles are assumed to be sufficiently rare to be neglected. Here the particles are stars, galaxies or even clusters of galaxies, which interact by the gravitational field generated collectively by the particles. READ MORE

5. 3. On the Einstein-Vlasov system: Stationary Solutions and Small Data Solutions with Charged and Massless Particles

   Author : Maximilian Thaller; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Static Solutions; Vector Field Method; non-linear wave equation; massless Einstein-Vlasov system; General Relativity; Conformal Einstein Field Equations; Minkowski stability; Vlasov matter; symmetric hyperbolic system; Einstein-Vlasov-Maxwell system;

   Abstract : The Vlasov matter model describes an ensemble of collisionless particles moving through space-time. These particles interact via the gravitational field which they create collectively. In the framework of General Relativity this gravitational field is described by space-time curvature. READ MORE

6. 4. Compact Relativistic Matter Shells with Massless and Charged Particles

   Author : Maximilian Thaller; Göteborgs universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Spherical Symmetry; massless Einstein-Vlasov system; Einstein-Vlasov-Maxwell system; Static Solutions; Vlasov matter; General Relativity; Einstein-Vlasov-Maxwell system;

   Abstract : The Vlasov model is a matter model that is widely used in physics. In the context of astrophysics and cosmology it describes an ensemble of self gravitating, collisionless particles. These particles can be interpreted as for example ions, stars, or galaxies. READ MORE

7. 5. On finite element schemes for Vlasov-Maxwell system and Schrödinger equation

   Author : Christoffer Standar; Göteborgs universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Nonlinear Schrödinger equation; Nitsche scheme; Streamline diffusion; Vlasov-Maxwell; a posteriori error analysis; a priori error analysis; hp-scheme; a posteriori error analysis;

   Abstract : This thesis treats finite element schemes for two kind of problems, the Valsov-Maxwellsystem and the nonlinear Schrödinger equation. We study streamline diffusion schemes applied for numerical solution of the one and one-half dimensional relativistic Vlasov-Maxwell system. The study is made both in a priori and a posteriori settings. READ MORE