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.
Results
Showing 1 to 7 of 7 for “"Rate heterogeneity"”.
-
Hiding in plain sight: accounting for rate heterogeneity in trait evolution models
… of these two themes, character dependence and rate heterogeneity, is more natural than it may first appear. This dissertation has four chapters addressing various issues in current phylogenetic comparative methods. In Chapter I, I extend discrete character models to allow for any number of …
-
A macro- and micro-evolutionary investigation of African Camponotus ants
… the cytochrome oxidase II gene displays greater rate heterogeneity than the cytochrome b gene, thereby decreasing its utility for phylogenetic analyses. Combining sequence data from both genes resulted in more robust phylogenetic hypotheses, with the combined topologies displaying greater …
-
Using a complex model of sequence evolution to evaluate and improve phylogenetic methods
… tree from computer simulated data. Data were generated on a variety of tree shapes under a complex model of sequence evolution based on the work of Aaron Halpern and William Bruno. Parameters of the model were estimated by maximum likelihood techniques applied to a phylogeny of 1,610 sequences of …
-
Rates of Molecular Evolution and Phylogenomic Inference
… genomic research is the analysis of variation in rate of evolution, both across a genome and between the genomes of species. In this study we explore the relationship between different types of rate heterogeneity. We develop several statistical methodologies to address issues associated with the …
-
Emergent properties of heterogeneous decomposition networks
… transforms and degrades over a wide range of rates, I model degradation as a network consisting of a large, quasi-continuum of states. The retention of carbon in the network is then estimated by using an eigenvalue projection to calculate the impulse response of the degradation system. For a …
-
Phylogenomic analysis of hemimetabolan insects with emphasis on the hemipteran suborder Auchenorrhyncha and the superorder Paraneoptera
… and explores the role of GC compositional heterogeneity on phylogenetic analyses of Auchenorrhyncha. Chapter 3 expands the taxonomic sampling of Chapter 2, resulting in increased support for the relationships of the auchenorrhynchan superfamilies. Chapter 3 again explores the relationship …
-
A Novel High Throughput Platform for Assessing Bacterial Growth and Morphology Enables Rapid Antibiotic Susceptibility Testing
… than three hours by tracking changes in growth rate, offering an eightfold speedup in turnaround time compared to current clinical standard phenotypic methods. The MAP has also been demonstrated as a research tool, allowing us to study the effects of antibiotics on bacterial growth and …