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 20 for “"measures of association"”.
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Rank correlation in a singly truncated bivariate normal distribution
… devoted to the rank correlation coefficients of Spearman and Kendall, denoted by r<sub>S</sub> and r<sub>K</sub> respectively. These coefficients were first proposed as measures of association between two groupings, requiring no assumptions on the parent distribution of the observations. Later …
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Spatial association in archaeology. Development of statistical methodologies and computer techniques for spatial association of surface, lattice and point processes, applied to prehistoric evidence in North Yorkshire and to the Heslerton Romano-British site.
The thesis investigates the concepts of archaeological spatial association within the context of both site and regional data sets. The techniques of geophysical surveying, surface distribution collection and aerial photography are described and discussed. Several new developments of technique are …
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Assessing How Information Affects Cognitive Maps of Strategic Issues
… makers in the soybean sector, the effects of the PCD system are formally evaluated. The evaluation uses pre- and post-treatment questionnaires to assess how cognitive maps change as a result of exposure to the PCD model. Content analysis is used to describe and analyze the cognitive maps of …
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Risk Perceptions of Adults in the Town of Unicoi, Tennessee, Regarding the Possible Building of a Uranium Enrichment Plant.
… enrichment facility has occurred in the Town of Unicoi, Tennessee. One hundred-seventy residents of Unicoi were interviewed using a questionnaire regarding the building of a proposed uranium enrichment facility for Unicoi. The questionnaire sought to determine relationships between residents’ …
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Development and Evaluation of Risk Models to Predict Readmission or Death Following Discharge from an Adult General Systems Intensive Care Unit
Transitions of care from intensive care unit (ICU) to ward are high-risk periods of healthcare delivery associated with ICU readmission and post-ICU mortality. Evidence-based processes for transitions are crucial for improving outcomes. Validated prediction models that include consistently …
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Advances in Copula Estimation and Distribution Theory
… are proposed and criteria for the selection of their tuning parameters are provided. These four approaches were found to produce similar density estimates, which validates their suitability. Moreover, the copula associated with a Wiener process and its running maximum is determined, and an …
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Investigation of Infectious Disease Associations with Cognitive Impairment using Electronic Medical Records
… electronic health record study to quantify the association between six clinically important infections—Herpes simplex virus (HSV), syphilis, Chlamydia trachomatis, coronavirus disease 2019 (COVID-19), cytomegalovirus (CMV), and human immunodeficiency virus (HIV)—and subsequent cognitive …
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A Semantic Modelling Approach to Knowledge Based Statistical Software
The topic of this thesis is the development of knowledge based statistical software. The shortcomings of conventional statistical packages are discussed to illustrate the need to develop software which is able to exhibit a greater degree of statistical expertise, thereby reducing the misuse of …
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Modeling and Analysis of Non-Linear Dependencies using Copulas, with Applications to Machine Learning
… random variables and allow flexible modeling of multivariate joint distributions. Elidan was the first to recognize this disconnect, and introduced copula based models to the ML community that demonstrated magnitudes of order better performance than the non copula-based models Elidan [2013]. …
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Organizational Structural and Cultural Variables as Predictors of Quality in Federally Approved Nursing Homes.
<p>The purpose of this study was to determine the extent to which nursing home organizational structure and cultural variables were related to the outcomes reported by the Health Care Finance Administration public use data set (HCFA-NHCD). A second purpose was to examine the effects of a new style …
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The use of patient choice in public health interventions for HIV treatment and prevention. A systematic review
Introduction: Africa has the highest burden of HIV globally. A growing number of evidencebased HIV intervention are being scaled up to eliminate HIV transmission and minimise morbidity and mortality. We reviewed the published HIV literature to describe interventions in which patients are given a …
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Understanding therapeutic traditions in a multilevel framework - new methodological approaches
Background: The observation of differences in the way apparently similar patients are treated from one health care setting to another, i.e., practice variation, have been recognized in numerous studies. The variations across the health care settings have been shown to exist for different outcomes. …
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Influência da variação sazonal no status de 25-hidroxivitamina D de adultos com síndrome metabólica de uma região do Brasil com elevados índices de radiação ultravioleta
The risk of metabolic syndrome can be influenced by inadequate vitamin D levels, and exposure to sunlight is the main external source of vitamin D. This study assessed the influence of environmental, biological and nutritional factors as a function of seasons on the 25OHD status among individuals …
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Alignment of Do-Not-Resuscitate Status with Patients’ Likelihood of Favorable Neurological Survival After In-Hospital Cardiac Arrest
… function to ensure autonomy and quality of life. Whether patients’ decisions to become Do-Not-Resuscitate (DNR) after a successful resuscitation are aligned with the likelihood of favorable neurological survival is unknown. Within Get With the Guidelines-Resuscitation, a prospective, …
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Influence of Human Immunodeficiency Virus and other risk factors on tuberculosis
… fold over the last two decades mainly because of the Human Immunodeficiency Virus (HIV) epidemic. Globally, it was estimated that 73% of the TB cases were co-infected with HIV with more than 25% of this global co-infection burden being in South Africa alone. In 2012, globally 1.3 million deaths …
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Factors Associated with Successful Electronic Medical Records (EMR) Implementation in Kenya
Background: Implementation of Electronic Medical Records (EMR) remains a relatively recent development in response to emerging needs to manage large volumes of data that are often associated with longitudinal care. Kenya’s HIV program created a large demand for responsive data management systems …
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Data analysis and simulation for warranties and golf handicaps
In this dissertation, we discuss the application of data analysis and numerical simulation in order to gain insight into problems related to warranty cost management and the effectiveness of the golf handicap system. Despite the commonalities of the approaches, we will discuss these problems in …
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Measuring and modelling information flows in real-world networks
… interact and behave. To understand the dynamics of complex systems, models to estimate features of pairwise relationships and information flows are critical. Often, existing techniques have not been tested in realistic data settings, or the statistical significance of results is unknown. These …
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A psychometric assessment of the Irish Civil Service employee engagement scale
… (CSEES) is an appropriate psychometric measure of employee engagement in the Irish Civil Service. For the purposes of this study, an appropriate employee engagement scale is defined as one that is psychometrically valid, reliable and robust and can provide meaningful quantitative insights into …
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The effect of deprivation and comorbidity on survival in patients with head and neck cancer
… characteristics on presentation and a range of individual factors such as socioeconomic status and comorbidity. Deprived patients of more advanced age have a higher likelihood of having comorbidity; this may be due to high-risk lifestyle behaviours such as smoking and drinking. Therefore, it …