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 77 for “"Rare Events"”.
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On inference about rare events
… statistical applications, critical patterns and events have often little, if any, representation. This is not unreasonable, given that such variables are critical precisely because they are rare. We then have to raise the natural question: when can we infer something meaningful in such contexts? …
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Rare events and dynamics in non-equilibrium systems
The matter of this thesis is divided in two parts, both of which are substantially different from the other, but nevertheless belong to disciplines that lie within the purview soft matter physics. In the first part, we study the infinite-dimensional probability space of stochastic differential …
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Network meta-analysis with rare events and misclassified response.
Count data are subject to considerable sources of what is often referred to as non-sampling error. Errors such as misclassification, measurement error, and unmeasured confounding can lead to substantially biased estimators. It is strongly recommended that epidemiologists not only acknowledge these …
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Rare Events in Stochastic Systems: Modeling, Simulation Design and Algorithm Analysis
… explores a few topics in the study of rare events in stochastic systems, with a particular emphasis on the simulation aspect. This line of research has been receiving a substantial amount of interest in recent years, mainly motivated by scientific and industrial applications in which …
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Exploring autism prediction through logistic regression analysis with corrections for rare events data
The study of rare events data in which observations of non-event outcomes far outnumber event outcomes makes inference under these circumstances quite difficult. Ideally, for a binary dependent variable, one would like sample data to contain enough observations from both outcome categories. With …
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Entropy functions and rare events in disordered systems by transfer matrix calculations and Monte Carlo sampling
This thesis treats problems from bioinformatics with Monte Carlo methods from statistical physics. Methods to compare molecular sequences (sequence alignment) make use of statistical tests to assess the significance of observed similarities. Distributions of optimal alignment scores over random …
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Investigation of rare events and slow dynamics in atomic and molecular liquids and glasses using ascent dynamics
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-12-01
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Search for rare events in [the square root of sigma nu nu] = 200 GeV Au+Au PHOBOS data
… analysis, we set an upper bound on the rate of rare events: events whose dN/dn distribution deviates more than statistically from the ensemble average dN/dn distribution for s [the square root of sigma nu nu] = 200 GeV Au+Au collisions in PHOBOS data. We carefully remove events that may exhibit …
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High Purity Germanium detectors for the search of rare events : background discrimination and future prospects with the GENIUS project
This thesis concentrates on the search for WIMP dark matter and neutrinoless double beta decay using High Purity Germanium detectors. In modern physics two of the main goals are to find out about the nature of dark matter and to answer the question on the neutrino mass. The HdMoi presently provides …
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Linear and log-linear models based on generalized inverse sampling scheme
… techniques and the applications in modeling rare events using generalized inverse sampling scheme. The Poisson model can be used for independent frequency count data. Also negative binomial and negative multinomial (NMn) models are applicable when there is only one rare category in the …
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Quantification of extreme event statistics in ship design
… current method for the quantification of extreme events is direct Monte Carlo simulation supplemented by complex statistical models. When such models are not sufficiently bound by physics-based simulation, the noise of statistical uncertainty quickly overpowers the response predictions for rare …
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Power-law distributions in events involving nuclear and radiological materials
Nuclear and radiological events are large-impact, hard-to-predict rare events, whose associated probability is exceedingly low. They can exert monumental impacts and lead to grave environmental and economic consequences. Identifying common trends of these events can help to assess the threat, and …
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Absolute Pitch and the P300: A Neuromusicological Study
The hypothesis has been confirmed. While the rare events presented in the contour and visual tasks do elicit P300's from both AP and RP subjects, the amplitude of the P300 elicited from the AP subjects in the pitch memory task is significantly smaller than that of the controls. There is also a …
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Modeling and analysis of single-molecule experiments
… molecules from the behavior of bulk by observing rare events and heterogeneity in the dynamics. This thesis discusses both models for single molecule experiments, including the stretching of DNA in hydrodynamic flows and the diffusion of tracer particles in heterogeneous environments, and methods …
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A case study in robust quickest detection for hidden Markov models
… frameworks recently suggested for detecting rare events in a real data set. The first method is a dynamic programming based Bayesian approach, and the second is a non-Bayesian approach based on the cumulative sum algorithm. We discuss implementation considerations for each method and show …
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STRUCTURAL RELIABILITY ANALYSIS BASED ON MAXIMUM ENTROPY DISTRIBUTION WITH FRACTIONAL MOMENTS
… prediction to account for the rare events occurrence rate. To predict the low probability of failure of offshore drilling riser system accurately and efficiently is crucial but challenging. An improved univariate density estimation method based on maximum entropy theory is …
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Adaptive polarization mode dispersion equalizers for coherent optical communications systems
… required to estimate the statistics of these rare events. The multicanonical Monte Carlo method does not require any prior knowledge of which rare events contribute significantly to the PMD-induced outages. In essence, multicanonical Monte Carlo simulations adaptively bias the input random …
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Network reliability estimation
… usually small and hence network failures become rare events. This poses a challenge to estimate the network reliability. In this thesis we present different techniques for network reliability estimation. There are two main sampling techniques in reliability estimation: combinatorial and …
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A fuzzy logic-based text classification method for social media
… and opinions during the evolution of various rare events such as natural disasters. It is useful to analyze the correlation between social media and human-affected events. This study uses Hurricane Sandy 2012 related Twitter text data to conduct information extraction and text classification. …
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4D Ex Vivo Crispr/Cas9 Whole-Genome Screen to Identify Genes Regulating Lung Cancer Metastasis
… until they are advanced. Metastases are very rare events, often initiated by a single cell from a primary tumor into a new niche at a distant location. Investigation of the early metastatic process is of urgent need for the development of early diagnostics and targeted therapeutics.<strong> …
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