Browsing Fakultät für Physik (inkl. GAUSS) by Referee "Parlitz, Ulrich Prof. Dr."
Now showing items 1-20 of 39
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Akustische Beeinflussung einer Instabilität in Kanälen mit überströmten Resonatoren
(2006-09-01)The sound-flow interaction in an acoustically lined section of an otherwise rigid duct is investigated. Turbulent fluctuations or imposed oscillations of the flow at the inlet of the lined ... -
Akustische Strömung in Wasser durch Ultraschall im UHF-Bereich
(2021-06-07)The goal of this predominantly experimental work is the understanding and investigation of acoustic streaming, which is generated by the sound field of new type of a very high frequency transducers. The transducers have ... -
Approximations and Applications of Nonlinear Filters
(2003-06-04)In this thesis a certain estimation problem for nonlinear stochastic dynamical systems in discrete time, known as filtering in the literature, is considered. The objective is to reconstruct ... -
Ballistic electron transport in graphene nanodevices and billiards
(2019-10-17)Nanodevices are objects with broad relevance for today's society, which bases its economy, operation, and communication onto digital resources. In ballistic nanodevices, disorder has either negligible or minor impact on ... -
Characterization and modeling of ultrasound propagation and cavitation in confined flow geometries
(2024-07-08)Acoustic cavitation is a process by which small bubbles are formed in a liquid that is exposed to sound waves such as ultrasound. These bubbles are peculiar because they expand and collapse violently on themselves resulting ... -
Data Analysis of Musical Timeseries
(2024-01-08)Music, despite its ubiquitous familiarity, is surprisingly hard to define. Should one consider its acoustic features, the mechanics by which it is produced and performed, as well as the cultural norms attached to them, ... -
Data driven analysis of brain activity and functional connectivity in fMRI
(2003-12-18)In this thesis the perspectives of statistical and graph-theoretical methods for the analysis of fMRI data are investigated. This involves preprocessing, extraction of components, functional ... -
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 ... -
Dynamic Responses of Networks under Perturbations: Solutions, Patterns and Predictions
(2018-05-31)External perturbations are omnipresent in the dynamics of oscillator networks across biology, physics and engineering. How such networks dynamically respond to fluctuating perturbation signals fundamentally underlies their ... -
Dynamical modeling with application to friction phenomena
(2005-11-22)The thesis deals with dynamical modeling as an alternative approach to the conventional way of modeling with static models. From the perspective of generalized synchronization the main ... -
Dynamik und Bifurkationsverhalten eines getriebenen Oszillators mit frei aufliegender Dämpfermasse
(2011-06-22)A driven spring-mass system supplemented by a loosely mounted, freely sliding damper mass is investigated. This oscillator is a simple model of a damping principle applied to turbine blades ... -
Experimental investigation of shock wave - bubble interaction
(2010-06-02)The dynamics of laser-generated single cavitation bubbles exposed to lithotripter shock waves is investigated experimentally. The effects of shock impact on the fast bubble dynamics are ... -
Hybrid Systems Modeling Manufacturing and Front Dynamics
(2004-06-04)This thesis investigates the dynamics of a certain class of hybrid dynamical systems, so called switched tank systems. By applying switched tank systems as models for manufacturing systems ... -
Intermittent Complexity Fluctuations during Ventricular Fibrillation
(2018-01-31)Ventricular fibrillation is a lethal cardiac arrhythmia that is one of the major causes of death worldwide. A prevalent treatment is the application of a high-energy shock using a cardiac defibrillator. These defibrillation ... -
Investigation of Physical and Chemical Effects in Sonicated Small Flow Channels
(2023-09-08)In the framework of intensification of chemical processes, miniature continuous flow reactors have come into focus in recent time. As a specific way of “non-classical” energy supply to the liquid in such a flow reactor, ... -
Local- and Cluster Weighted Modeling for Prediction and State Estimation of Nonlinear Dynamical Systems
(2011-08-08)This thesis deals with black-box modeling techniques, in particular local models based on nearest neighbors, and Cluster Weighted Models, which combine a stochastic clustering of the input ... -
Magnetic Activity at the Poles of the Sun
(2008-11-11)This work sheds light on the role of polar faculae with respect to the global magnetic field of the Sun, on the basis of high spatial resolution spectropolarimetric observations, while ... -
Modellierung dynamischer Prozesse mit radialen Basisfunktionen
(2010-12-03)The thesis deals with modeling of nonlinear dynamical systems from measured time series corresponding to a few different values of the system parameters and the dependence of the dynamics ... -
Modenstruktur und adaptive Regelung der Strahl-Kanten-Strömung
(2005-02-14)The stabilization of the plane laminar jet-edge-flow is studied with the general objective to gain some gerneral experience with flow control. The convective instability of the jet combined ... -
Nächste-Nachbar basierte Methoden in der nichtlinearen Zeitreihenanalyse
(2001-09-11)The subject of this thesis is the application of nearest-neighbor based methods within the field of nonlinear time-series analysis. A main area of application there is the modeling and ...