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 6 of 6 for “"meanfield"”.
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Dynamics of the rise of magnetic flux tubes in stellar interiors
… auf der Basis der Meanfield-Formulierung führten auf ein neues Dynamo-Regime, das nur bei Anwesenheit der Verzögerung existiert. Die erforderlichen Verzögerungen sind von der Gröÿenordnung der Zykluslänge, die resultierenden Magnetfelder sind schwächer als die …
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Computational modelling of the vortex state in high-temperature superconductors
… in the c-direction allows us to employ a meanfield method: all attractive inter-layer interactions are described by a substrate potential, which pancakes experience in addition to the in-layer pancake repulsion. Using an averaged pancake-density, we iteratively re-compute the substrate …
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Why it takes all kinds: diversity mechanisms and patterns in ecological communities
… Three individual-based models are employed: 1) a meanfield differential equation model, 2) a simulation model of plant populations, and 3) a simulation model of interacting organisms.<br/><br/>The mean-field model is used to show that the traits of individuals in a community affect community …
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Microscopic theory for dynamics in entangled polymer nanocomposites
… generalization of a first-principles dynamic meanfield approach is presented. The theory enforces inter-needle topological uncrossability and needlesphere impenetrability in a unified manner, leading to a generalized theory of entanglements that includes the sphere excluded volume effect. …
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Phase transitions and critical phenomena: Universality and global multicritical phase diagrams from position-space renormalization-group studies
… qualitatively similar to that obtained with the meanfield approximation, except in the vicinity of the Potts transition where a four-phase coexistence line in mean-field theory shrinks into a special tricritical point in renormalization-group theory. The global connectivity and local exponents of …
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Synchronization transitions in complex systems
Gegenstand dieser Arbeit ist die Untersuchung generischer Synchronisierungsphänomene in interagierenden komplexen Systemen. Diese Phänomene werden u.a. in gekoppelten deterministischen chaotischen Systemen beobachtet. Bei sehr schwachen Interaktionen zwischen individuellen Systemen kann ein …