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 12 of 12 for “"Brownian bridge"”.
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Geometry of sub-Riemannian diffusion processes
… asymptotics of sub-Riemannian diffusion bridges. After giving an overview of recent work by Bailleul, Mesnager and Norris on small-time fluctuations for the bridge of a sub-Riemannian diffusion, we show, by providing a specific example, that, unlike in the Riemannian case, small-time …
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Confidence bands for survival functions under semiparametric random censorship models
… limiting distribution cannot be transformed to a Brownian Bridge unlike for the normalized Kaplan{Meier process, a two-stage bootstrap approach that combines the classical bootstrap with the more recent model-based regeneration of censoring indicators is proposed and a justification of its …
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Change Point Detection and Estimation in Sequences of Dependent Random Variables
… is found to be a weighted sum of</p> <p>squared Brownian bridge processes and an approximation to calculate p-values is discussed. A Worsley type upper bound for p-values is provided as an alternative. The asymptotic distribution of the dependent LRT is unknown, but the tail probabilities are …
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SPATIAL AND TEMPORAL TRENDS IN RANGE-USE BY THE BATHURST CARIBOU DURING A POPULATION DECLINE, 1997-2019
… We used this timing information to create Brownian Bridge maps that capture seasonal ranges unique to herd behavior each year, as well as mapping their annual ranges. We applied linear regression models to our annual and seasonal range maps to explore temporal trends of habitat-use across …
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Population Ecology of Rocky Mountain Elk in the Black Hills, South Dakota and Wyoming
… from 6.41km – 153.95 km (n = 46). We used 99% Brownian Bridge Movement Models to create seasonal and overall home ranges of adult cow elk. Mean overall home range size for conditional migrators was 249.28 km2 (SE = 28.60, n = 7, range = 233.75), for obligate migrant elk it was 227.18 km2 (SE = …
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Modeling and quasi-Monte Carlo simulation of risk in credit portfolios
… by devising several new algorithms involving the Brownian bridge construction and principal component analysis. The simulation results from tests under various scenarios suggest that quasi-Monte Carlo methods can substantially improve simulation effectiveness not only for the problems of computing …
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Approximation of Quantiles of Rank Test Statistics Using Almost Sure Limit Theorems
… of the supremum of the absolute value of the Brownian bridge, which has an open form. We propose an approximation of the quantiles for the test statistic based on LQE. We provide simulation results for Type I error and power of the logarithmic quantile estimates for the test statistic, and …
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Probabilistic Schwarzian Field Theory
… on the appropriate reparametrisation of the Brownian bridge measure, and the partition function calculation is done via an application of a suitable analogue of Girsanov formula. The obtained result for the partition function agrees with the formula derived in physics literature using a …
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Integrative perspectives of wild and captive sifaka conservation
… I combined behavior data with Dynamic Brownian Bridge Movement Models and Resource Selection Functions to examine the influence of abiotic, biotic, and anthropogenic factors on movement and foraging patterns. I found that movement rates and core area use were greater in the rainy season …
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Factors influencing the space use of a nonhunted population of eastern wild turkeys
… operating in this population. I used dynamic Brownian Bridge Movement Models to estimate daily and seasonal ranges. Median daily mating season ranges of 100 percent of males were larger than median daily non-mating season ranges, and 83 percent of males had larger mating season ranges than …
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Geometric Algorithms and Data Structures for Simulating Diffusion Limited Reactions
Radiation therapy is one of the most effective means for treating cancers. An important calculation in radiation therapy is the estimation of dose distribution in the treated patient, which is key to determining the treatment outcome and potential side effects of the therapy. Biological dose — the …
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Malleefowl and anthropogenic change: an integrated analysis of population trends, landscape genetics and movement ecology
Malleefowl are iconic Australian birds that build large mounds to incubate their eggs using external sources of heat. Malleefowl numbers have drastically decreased since European settlement and they are now a nationally threatened species. Their decline is caused by habitat loss and fragmentation; …