Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 119 for “"steady states"”.
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Fluctuations around nonequilibrium steady states
Submitted by Megan Hayes (mohayes2@illinois.edu) on 2012-05-10T21:40:05Z No. of bitstreams: 1 1998_paniconi.pdf: 4584704 bytes, checksum: 88a9c11504aec9d3e9f946e04adf126e (MD5)
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Steady states in rapidly evolving populations
… fitness decline via Muller's ratchet. The steady state that separates parameter regimes of positive adaptation and negative adaptation is characterized by appealing to the exponential dependence of fixation probabilities on fitness effect sizes. We consider a range of fitness-mediated …
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The edge of thermodynamics : driven steady states in physics and biology
… nonequilibrium systems that characterize their steady-state properties in terms of generalized thermodynamic quantities. Concrete computations using these principles can usually only be carried out in certain limiting regimes, including the near-equilibrium regime of linear response theory. But …
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Scaling of Steady States in a Simple Driven Three-State Lattice Gas
Phase segregated states in a simple three-state stochastic lattice gas are investigated. A two dimensional finite lattice with periodic boundary conditions is filled with one hole and two oppositely "charged" species of particles, subject to an excluded volume constraint. Starting from a completely …
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Non-equilibrium Phase Transitions and Steady States in Biased Diffusion of Two Species
… the order of these transitions and map out the steady state phase diagram of the system. On a single sheet of transitions, a line of multicritical points is found, separating the first order and continuous transitions. Furthermore, we study the steady-state structure factors in the disordered …
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Relaxation phenomena in glass-forming liquids and long range correlations in nonequilibrium steady states
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1997.
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Driven Magnetic Flux Lines in Type-II Superconductors: Nonequilibrium Steady States and Relaxation Properties
We investigate the nonequilibrium steady state of driven magnetic flux lines in type-II superconductors subject to strong point or columnar pinning centers and the aging dynamics of nonequilibrium relaxation process in the presence of weak point pinning centers. We employ a three-dimensional …
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Monte Carlo analysis of non-equilibrium steady states and relaxation kinetics in driven lattice gases
… the relaxation towards the non-equilibrium steady state in the two-time density-density auto-correlations, starting from strongly correlated initial conditions. We obtain simple aging scaling behavior in one, two, and three dimensions, with the expected power laws. We numerically investigate …
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Transition dynamics between the multiple steady states in natural ventilation systems : from theories to applications in optimal controls
In this study, we investigated the multiple steady state behavior, an important observation in numerical and experimental studies in natural ventilation systems. The-oretical models are developed and their applications in numerical simulations and ventilation controls are presented. In a system …
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Microscopic Chaos, Fractals, and Transport in Nonequilibrium Steady States. - (Die Veröffentlichung einer ergänzten und überarbeiteten Version bei "World Scientific Publishing" ist für 2005/06 geplant.)
… system we compare the resulting nonequilibrium steady states with each other. Along the same lines we discuss an interacting many-particle system under shear and heat. Finally, we outline an unexpected relationship between deterministic thermostats and active Brownian particles modeling …
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Vortices in sinusoidal shear, with applications to Jupiter
… thesis, we have studied the existence of vortex steady states in a sinusoidal background shear flow in a 1.75 layer quasi-geostrophic model. Trying to find vortex structures by integrating the Hamiltonian system has the drawback that the vortices lose enstrophy by filamentation and numerical …
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Vortices in sinusoidal shear, with applications to Jupiter
… thesis, we have studied the existence of vortex steady states in a sinusoidal background shear flow in a 1.75 layer quasi-geostrophic model. Trying to find vortex structures by integrating the Hamiltonian system has the drawback that the vortices lose enstrophy by filamentation and numerical …
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Generic planar lattice patterns in liquid crystals
… Some of the generic equilibrium patterns (steady states) on a square or hexagonal lattice that bifurcate from a homeotropic or planar isotropic state were calculated in Chillingworth and Golubitsky 2003 J. Mathematical Physics 44(9) 4201-4219. Continuing this work we calculate a second set …
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Zonal flow driven by convection and convection driven by internal heating
… and are approximately two-dimensional. Stable steady states with zonal flow are found for Prandtl numbers up to 0.3. Stable and unstable steady states with horizontal periods up to six times the layer height are computed for a Prandtl number of 0.1 and Rayleigh numbers, Ra, up to 2*10⁵. …
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Efficient Equivalence Checking in a Modular Design Environment
… We propose an algorithm to compute the steady states of a machine by relaxing the assumption of a designated set of initial states (DIS). This assumption is used in research but is often restrictive in an industrial design environment. We use the paradigm of sequential hardware …
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Non-Equilibrium Pattern Formation in Multi-Species Interacting Particle Systems
… systems can form complex patterns in their steady states. Examples are systems consisting of self-propelled particles or systems consisting of particles driven away from equilibrium by external energy sources. In steady states, the interacting particles spontaneously organise into complex …
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Monte Carlo and Series Expansion Studies of the Anisotropic Driven Ising Lattice Gas Phase Diagram
… systems, this study is restricted to the steady states of a simple model whose equilibrium properties are well known. The Ising lattice gas displays a number of surprising phenomena when driven into nonequilibrium steady states. This study extends previous work to a more general model with …
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Study of Buoyancy -Induced Flows in a Prototypical CVD Reactor
… conditions. But it oscillates between two end steady states. Thus, it is observed that film growth rate and uniformity cannot be improved by applying pulse sequence of precursor gas, pulse sequence of inlet mass flow rate, and time-varying rotation speed of the wafer.
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Control of polymorphism in continuous crystallization
… stable form is likely to be the dominant form at steady state. On the other hand, at low temperatures, the interplay of the crystal growth and nucleation kinetics is found to play an important role in determining the final polymorphism. Similar results were identified in the enantiotropic …
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Signal transmission in epithelial layers
… is a possibility of existence of multiple steady states and traveling wave solutions. In this thesis, we investigate these types of solutions numerically and analytically. Looking for steady solutions of parabolic reaction-diffusion equations leads to nonlinear elliptic boundary-value …
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