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 29526 for “"population"”.
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Population models
… explore the interactions of the lynx and hare populations in Canada based on data retrieved by the Hudson Bay Company. The purpose of this study is to find a suitable mathematical model, namely that of a three-variable Lotka-Volterra system. Also, the paper will explore short-term infectious …
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Population dynamics of Virginia's hunted black bear (Ursus americanus) population
… and State University (VPI&SU) to investigate population dynamics on Virginia's hunted bear population. CABS personnel handled 746 different bears (1.5M:1F) 1,368 times on its northern study area during June 1994 to September 2000. The sex ratio for summer captures was 1.5M:1F, which differed …
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Toward population control : philosophical and constitutional aspects of national population policy
Thesis. 1975. B.S.--Massachusetts Institute of Technology. Dept. of Urban Studies and Planning.
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Asymptotic Analysis of Some Stochastic Models from Population Dynamics and Population Genetics
… that laid the foundation for contemporary population genetics. The Wright-Fisher model and its extensions have given biologists powerful tools of statistical inference that enabled the quantification of genetic drift and selection. Given the utility of these tools, we often forget that …
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MODELLING CELL POPULATION GROWTH
The growth of biological matter, e.g., tumor invasion, depends on various factors, mainly the tissue’s mechanical properties, implying elasticity, stiffness, or apparent viscosity. These properties are impacted by the characteristics of the tissue’s extracellular matrix and constituent cells, …
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Finite Population Quantile Estimators
Improved estimates of a survey population parameter can be obtained by using information about co-related auxiliary variable. There is a huge literature on such methods for estimating the mean. Here we explore some median-versions of these mean-based methods. Following an introduction in sampling …
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Aspects of population dynamics
… systems can be modeled through relatively simple population dynamics models. There is a plethora of models describing deterministic models of ecological systems evolving in a constant environment. However, stochasticity can lead to extinction or fixation events, noise-stabilized patterns, and …
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Bioacoustic Studies of Population Size and Microdialects in an Island-Living Savannah Sparrow Population
… of passive acoustic monitoring in estimating population size and annual survival in an island population of Savannah Sparrows. Six years of data reveal that passive acoustic monitoring with autonomous recorders provides accurate underestimates of population size and annual survival. I found …
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Population Size of Blue-footed Boobies in Galápagos: Evaluation of Indications of Population Decline
… in Galápagos, Ecuador from 2011-2012 indicated a population reduction, probably by more than 50%. Anthropogenic effects such as introduced predators are unlikely to explain this decline, because islands with and without such factors exhibited the same low breeding. The poor reproduction seems to …
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United States population policies and environmental ethics: Addressing population growth from the biocentric perspective
… were raised over the prospects of the U.S. population growing to an unsustainable level and causing irreparable harm to the environment and our quality of life. Unfortunately, population growth has not been given the priority it deserves not because it is not an important issue, but because …
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Population dynamics and population genetics of the Critically Endangered Raso lark: implications for conservation
… the species at risk: its extreme fluctuations in population size, and its potentially very low genetic diversity arising from small population size and severe past population contraction. More specifically, two chapters estimate year-to-year survival and explore the factors - environmental and …
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Population Genomics of Polistes Wasps
… steps taken to generate a high quality population genomic data set for primitively eusocial paper wasps in the genus Polistes. The third chapter of the thesis uses the dataset generated in chapter two to estimate patterns of natural selection on the Polistes genome, and to evaluate the …
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Statistical approaches to population genetics
… is concerned with the statistical approach to population genetics. The genetical characteristics of the population under consideration are the population size and the gene frequencies. The limitations on the population are (a) the individuals are either all haploids or all diploids; (b) the …
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Pursuing Equity in Diabetes Population
… gap between Hispanics/Latino and Caucasian populations. The Pursuing IHI initiative is over a 2-year period completed at a microsystem that is focusing on health equity practices to reduce disparity gaps.</p> <p><strong>Project aim</strong></p> <p>KP Riverside, microsystem selected has a …
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The population incidence of cancer
… genotype, as well as its distribution in human populations. The starting point for the thesis is the general observation that cancer incidence grows in approximate proportion to an integer power of age. Quasi-mechanistic mathematical models of cancer incidence have suggested that the integer …
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STOCHASTIC MODELS IN POPULATION DYNAMICS.
… the construction of some stochastic models for population dynamics with a variety of birth and death rate functions. A general model is constructed considering a fundamental growth rate function of the population while allowing random births and deaths in the population. Four stochastic discrete …
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Population dynamics of African Trypanosomiasis
… Trypanotolerance Centre, TheGambia. Tsetse population parameters were investigated in arecapture study, and a method of analysis of these data whichallows for cyclic availability to the traps was developed. Themodel was modified to calculate the expected fraction ofpositive blood films …
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Population dynamics of bacterial persistence
… is one such strategy, where an isogenic population splits into subpopulations that respond differently under identical environments. Bacterial persistence is a prime example of such phenotypic heterogeneity, whereby a population survives under an antibiotic attack, by keeping a fraction …
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Modeling Stem Cell Population Dynamics
… mature cells is compensated by the presence of a population of stem cells which possesses the capability to self renew and to differentiate into various cell lineages. This process of continual cell replacement, is called homeostasis, is critical for the maintenance of adult tissues, and is …
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