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 32 for “"population diversity"”.
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Stenocarpella Maydis: Identification, Management, and Population Diversity
… depths in a corn field, and iv) identify genetic diversity among S. maydis isolates collected from the Midwestern and Southern United States. The genus Stenocarpella contains two species, S. maydis and S. macrospora, both able to infect corn plants. Previously, identification of the two species …
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Evaluation of Random Amplified Polymorphic DNA and Simple Sequence Repeat markers in Moringa oleifera (Lam.) to establish population diversity
… genetic variation of both native and introduced populations of Moringa, although phenotypic observations suggest the presence of significant genetic diversity. To do this we used Moringa collections from different locations including India, South Africa and Hawaii, with different cultivars …
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The significance of strain diversity in the epidemiology of Camplobacter jejuni gastrointestinal infections
A polyphasic study of the population diversity in a collection of Campylobacterjejuni isolates involved in human disease and from animal and environmental sources was undertakert Isolates were characterised by phenotype, using heat stable antigen serotype, bacteriophage type and biotyping methods. …
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Municipal Voter Turn-Out In Ontario: An Analysis of Community Theories and Their Application to a Prescription for Higher Voter Turn-Out in Municipal Elections
… assumptions regarding the impact of size (population), diversity (immigration), creativity (education and employment), and mobility (length of residency) on voter turnout. A sample of 30 Ontario urban municipalities was analyzed based on data from the 2006 Census. The findings reveal that …
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The Creation of Metropolitan Amazonia: Genetic Consequences of Migration and Urbanization
… Yurimaguas is characterized by considerable population diversity. Individually unique migratory and demographic profiles were combined with population genetic methodology to cultivate a co-constitutive view of the establishment of a modern Amazonian urban center. Yurimaguas, like many cities …
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Investigating genetic programming with novelty and domain knowledge for program synthesis
Low population diversity is recognized as a factor in premature convergence of evolutionary algorithms. We investigate program synthesis performance via grammatical evolution using novelty search -- substituting the conventional search objective -- based on synthesis quality, with a novelty …
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Artificial evolution with Binary Decision Diagrams: a study in evolvability in neutral spaces
… modularity, gradualism, robustness and diversity. Evolvability is found to emerge under gradual evolution as a biased distribution of functionality within the genotype-phenotype map, which serves to direct phenotypic variation. Neutrality facilitates fitness-conserving exploration, …
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Ethnic mobility and the spatial distribution of ethnicity in Auckland
… a country’s past, present and expected future population diversity at sub-national levels is important. Studying changing diversity in terms of the groups that constitute a population and how that varies within regions and between local areas assists in understanding socio-economic and …
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Multi-Objective evolutionary algorithms for vehicle routing problems
… and even fewer have explicitly considered the diversity of solutions, which is crucial for the good performance of any evolutionary computation technique. This thesis proposes a novel Multi-Objective Evolutionary Algorithm to solve two variants of the Vehicle Routing Problem, regarding the …
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Modeling Diverse Treatment Policies from Observational Health Data
… in expert strategies, reflecting treatment population diversity.
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Spectral analysis of neutral evolution
… network. It has been demonstrated that, in large populations under a high mutation rate, the population distribution over the neutral network and average mutational robustness are given by the principal eigenvector and eigen- value, respectively, of the network's adjacency matrix. However, little …
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Improving the genome assembly and annotation of the white-tailed deer (Odocoileus virginianus borealis)
… Markovian coalescent was used to infer population diversity of white-tailed deer for the past 2 million years. This accurate and more complete assembly will support future genomic studies on white-tailed deer and permit the use of chromatin-contact information to construct a …
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Contributions of Structural and Non-structural Genes to the Attenuation of the 17D Vaccine
… 17D vaccines. RNA viruses are known to exist as populations of genetically related virions, known as quasispecies population, which contributes to the fitness and virulence of a virus. Infectious clone (IC)-derived chimeric viruses will be used to investigate contributions of NS protein genes to …
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Basidiospore infection of Austropuccinia psidii and resistance ofopen-pollinated Eucalyptus globulus families to rust and Teratosphaeria Leaf Disease
… a comprehensive understanding of pathogen population diversity, and the selection of resistant genotypes through inoculations under controlled environmental conditions. This study aimed to assess the resistance of native families of E. globulus to A. psidii and T. nubilosa (Brazilian …
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Evolutionary Computation for Dynamic Optimisation Problems with Different Requirement Satisfaction
… focuses on tracking moving optima or maintaining population diversity. Studies in Evolutionary Dynamic Optimization (EDO) typically allow for many individual evaluations before the environment changes. When the environment changes very quickly, unsolved challenges arise where typical …
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Bayesian network structure learning using characteristic properties of permutation representations with applications to prostate cancer treatment.
… are identified that result in a loss of population diversity throughout the search. The thesis proposes two approaches to handle the loss of diversity. First, the benefits of introducing the Island Model (IM) paradigm are studied, showing that diversity loss can be significantly reduced. …
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Palaeoclimatic impacts on the phylogeography of an Afro-montane liverwort: Jamesoniella colorata (Lophoziaceae )
The mechanisms behind the high level of plant diversity and endemism observed in the Cape Floral Region (CFR) of South Africa have been the focus of many studies. Recently developed methods that employ DNA sequence data are making major contributions in reconstructing evolutionary histories of CFR …
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A Complex Systems Approach to Understanding Cells as Systems and Agents
… and the agents that interact within cellular populations. Specifically, I simulate cell-like agents composed of networks with binary-valued nodes. Agents can interact with their environment or with each other via external signals in the form of inputs to designated receptor nodes. With this …
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Shotgun metagenomic approach to the influence of industrialization and social behavior on fecal microbiomes
… further sequence data from more diverse canine populations than are currently represented in the literature. We find evidence to support the hypothesis of a gradient of industrialization that highlights a decrease in taxonomic diversity with increasing industrialization. We also find evidence to …
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