Browsing Fakultät für Physik (inkl. GAUSS) by Advisor & Referee "Kree, Reiner Prof. Dr."
Now showing items 21-40 of 44
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Phase Behavior of Liquid Crystals in Confinement
(2012-01-12)We use computer simulations to investigate the isotropic-to-nematic phase transition of liquid crystals. Using the Lebwohl-Lasher model with sophisticated algorithms, the phase transition ... -
Random Block Copolymer Melts in the Bulk and at Selective Substrates
(2011-12-15)Random block copolymers are polymers that consist of two different, randomly as- sembled types of blocks. Each of these blocks comprises one type of monomer and a repulsion between these ... -
Dense Granular Fluids and the Granular Glass Transition
(2011-11-17)Driven granular fluids at finite density are investigated theoretically and numerically for nontrivial correlations and for the formation of an dynamically arrested, amorphous, i.e., glassy ... -
Directional sensing and chemotaxis in eukaryotic cells - a quantitative study
(2011-09-22)We investigate the mechanisms behind eukaryotic chemotaxis using the model organism Dictyostelium discoideum. We propose a theoretical model of directional sensing based on a local ... -
Orientational order and glassy states in networks of semiflexible polymers
(2011-02-01)Motivated by the structure of networks of cross-linked cytoskeletal biopolymers, the orientationally ordered phases in networks of randomly cross-linked semiflexible polymers are studied ... -
Nanoscale pattern formation on ion-sputtered surfaces
(2010-04-12)Self-organized, nano-scale structures appear on solid surfaces under ion beam irradiation with ion energies in the keV range. Within the last decade, surface engineering by ion beam sputtering ... -
Mathematical Description of Differential Hebbian Plasticity and its Relation to Reinforcement Learning
(2009-11-18)The human brain consists of more than a billion nerve cells, the neurons, each having several thousand connections, the synapses. These connections are not fixed but change all the time. In order to describe synaptic ... -
New Methods in NMR Spectroscopy for the Study of Protein Dynamics
(2009-01-21)The focus of this work has been the investigation of internal protein dynamics in a time window between the overall tumbling correlation time tau_c (a few nanoseconds) and about 50 microseconds ... -
Spin-orbit interaction in quantum dots and quantum wires of correlated electrons - A way to spintronics?
(2008-11-25)We study the influence of the spin-orbit interaction on the electronic transport through quantum dots and quantum wires of correlated electrons. Starting with a one-dimensional infinite ... -
Funktionale Renormierungsgruppe für Nichtgleichgewichtsphänomene in Vielteilchensysteme
(2008-02-19)The aim of this work is the extension of the functional renormalization group (FRG) formalism to treat non-equilibrium situations. To this end, we reformulate the FRG equations in terms of the Keldysh method which is ... -
Single Particle Dynamics of Anderson-like Impurity Models: A Functional Renormalization Group Study
(2007-05-22)The Anderson Impurity Model is a generic model to describe systems in which one or more energy levels are coupled to an electronic host. On the energy levels the electrons are subject to a ... -
Modelling and simulation of surface morphology driven by ion bombardment
(2006-06-22)Non-equilibrum surfaces, at nanometer length scales, externally driven via bombardment with energetic particles are known to exhibit well ordered patterns with a variety of applications in ... -
Dynamics of Population Coding in the Cortex
(2005-08-19)In this thesis, I investigate the action potential (AP) initiation dynamics in cortical neurons and its consequences for dynamical population coding in the cortex.In chapter 3, I assess the ... -
Rapid Determination of Protein Structures in Solution Using NMR Dipolar Couplings
(2005-04-06)Once NMR spectra are measured, two main steps follow to determine NMR structure. One is backbone resonance assignment and the other is structure calculation. The both are time consuming ... -
Einfache Modelle für komplexe Biomembranen
(2003-10-22)Biomembranes are complex two-dimensional fluids consisting of proteins and lipids. In this work, simple molecular models are developed, applied and discussed to describe the thermodynamic ... -
Collective Dynamics in Networks of Pulse-Coupled Oscillators
(2003-02-25)Pulse-coupled oscillators constitute a paradigmatic class of dynamical systems interacting on networks. They model a variety of natural systems including earthquakes, flashing fireflies and ... -
Dephasing and phase-coherence in disordered mesoscopic conductors
(2001-11-07)In the first part of this thesis a novel Eikonal approach to calculate the dephasing time in disordered conductors is presented. The applied method has, compared to earlier calculations, the advantage that it does not ... -
Microscopic models of energy dissipation by internal degrees of freedom in particle collisions
(2001-11-06)A microscopy model of energy dissipation in collisions of macroscopic bodies is investigated. Dissipation of translational energy is modelled by excitation of elastic vibrations of the ... -
Aspects of Signal Processing in Noisy Neurons
(2001-11-06)It has become clear in recent years that stochastic effects, commonly known as noise, do not necessarily impede signal processing, but may actually serve to enhance it. The effect is known ... -
Free cooling of granular particles with rotational degrees of freedom
(2001-11-06)Aim of this theses is to elucidate the role of rotational degrees of freedom in a system of freely cooling granular particles. To gather more general aspects rough spherical particles and, as an example for non-spherical ...