Search for dissertations about: "Branching diffusion"
Showing result 1 - 5 of 16 swedish dissertations containing the words Branching diffusion.
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1. Small Molecule Diffusion in Spherulitic Polyethylene : Experimental Results and Simulations
Abstract : The diffusion of small-molecule penetrants in polyethylene is hindered by impenetrable crystals and by the segmental constraints imposed by the crystals on the penetrable phase. Liquid and vapour n-hexane sorption/desorption measurements were performed on metallocene catalyzed homogenous poly(ethylene-co-octene)s. READ MORE
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2. Multi-trait Branching Models with Applications to Species Evolution
Abstract : This thesis provides an analysis of the evolution of discrete traits and their effect on the birth and survival of species using the theory of supercritical, continuous time Markov branching processes. We present a branching modeling framework that incorporates multi-trait diversification processes associated with the emergence of new species, death of existing species, and transition of species carrying one type of a trait to another. READ MORE
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3. Stochastic Models in Phylogenetic Comparative Methods: Analytical Properties and Parameter Estimation
Abstract : Phylogenetic comparative methods are well established tools for using inter-species variation to analyse phenotypic evolution and adaptation. They are generally hampered, however, by predominantly univariate approaches and failure to include uncertainty and measurement error in the phylogeny as well as the measured traits. READ MORE
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4. Diffusion approximation and extinction of almost critical general branching processes
Abstract : .... READ MORE
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5. Computational framework for studying charge transport in high-voltage gas-insulated systems
Abstract : Electrical switchgear industry dealing with transmission and distribution of power is strongly affected by the changing dynamics of climate control. Their main contribution to the global warming is through SF6 gas, having a GWP of 23500 (times of CO2). SF6 plays an important role in providing electrical insulation for these high voltage systems. READ MORE