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 7 of 7 for “"Diffusionsgleichung"”.
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Transport processes in quantum spinsystems
… das stochastische XY Modell wird rigoros eine Diffusionsgleichung für die Magnetisierung hergeleitet.
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Über lasergeheizte kolloidale Goldnanopartikel in Polymerlösungen
… durch die numerische Integration der erweiterten Diffusionsgleichung berechnet werden. Aufgrund der komplexen Temperatur-, Konzentrations- und Molmassenabhängigkeit dieses Prozesses stehen die Selbstverstärkung und Schwächung der Konzentrationsabreicherung im Wettbewerb. Die Konzentration in der …
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Die Parallelisierung des filternden algebraischen Mehrgitterverfahrens zum Lösen partieller Differentialgleichungen
… Anisotrope Poissongleichung und die Konvektions-Diffusionsgleichung für lineare Strömungen und Kreisströmungen präsentiert. Für diese singulär gestörten Differentialgleichungen werden auch extreme Parameterwerte getestet, die üblicherweise ein paralleles Lösungsverfahren zum Versagen bringen. Die …
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Morphogenetic signaling in growing tissues
During the development of multicellular organisms, organs grow to well-defined shapes and sizes. The proper size and patterning of tissues are ensured by signaling molecules as e.g. morphogens. Secreted from a restricted source, morphogens spread into the adjacent target tissue where they form a …
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Adjustment of DRASTIC vulnerability index to assess groundwater vulnerability for nitrate pollution using the advection diffusion cell
This study aims to estimate aquifer vulnerability by applying the standard DRASTIC index as well as utilizing the Emission-Transmission-Immission (ETI) concept to assess the groundwater vulnerability to groundwater contamination by nitrate in a part of the Venlo Block (German name: Venloer Scholle) …
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Bacteria transport under unsaturated conditions
The aim of this work was to study the bacteria transport behaviour in different conditions using an unsaturated porous media. A column based system able to keep the unsaturated conditions was designed and developed to perform the experiments. Two bacteria strains Deinococcus radiodurans and …
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Numerical simulation of platelet adhesion, activation and aggregation : application to Taylor-Couette systems
Heart attack and stroke are among the leading causes of death in industrial nations but the number of candidates needing a transplant exceeds the number of transplants performed. Due to this chronic shortage, blood pumps are needed to deliver appropriate hydraulic performance while maintaining …