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 “"selection of variables"”.
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Representative selection of variables
The classical and most frequent use of the discriminant function is for the purpose of classification, by obtaining a combined measurement such that the difference between two or more groups is as large as possible. The linear discriminant function for the special case of two groups was first …
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An analysis of factors affecting the increased usage of emergency rooms for primary care
This paper explains the increased use of hospital-based emergency facilities for primary care. The analysis identifies socio-demographic characteristics, individual resources and selected access variables which influence use of physician services or emergency rooms. The selection of variables is …
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Variable selection in discrete survival models
Selection of variables is vital in high dimensional statistical modelling as it aims to identify the right subset model. However, variable selection for discrete survival analysis poses many challenges due to a complicated data structure. Survival data might have unobserved heterogeneity leading to …
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Nonexplicit Singular Perturbations and Interconnected Systems
… be an effective tool in the analysis and design of systems with "slow" and "fast" dynamics. However, the use of this tool is often inhibited by the fact that when physical quantities are selected as state variables the model fails to be in the standard singularly perturbed form. In this thesis we …
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Contributions to Structured Variable Selection Towards Enhancing Model Interpretation and Computation Efficiency
… data sets with high dimensionality. Variable selection is an important procedure to extract useful knowledge from such complex data. While in many real-data applications, appropriate selection of variables should facilitate the model interpretation and computation efficiency. It is thus …
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Building Inventory Simulations for High Velocity Garment Retail Stores
… predict the display inventory and the number of store and display unique articles based on Monte Carlo outputs. In the process of building the Monte Carlo model, the project examined methods to model inventory trends, developed a quantification technique for daily demand stochasticity, and …
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Predicting the STEM Outcomes of Academically Qualified Women: A Longitudinal Examination of Social Cognitive Career Theory
… (STEM) fields, which has been the focus of research for several decades (i.e., Betz & Hackett, 1981; Ceci & Williams, 2009, 2010; Wang, Eccles, & Kenny, 2013). Questions as to why this is the case are not new; however, with the growing body of research, there seem to be more questions …
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Bayesian Model Averaging and Variable Selection in Multivariate Ecological Models
… promising models and obtaining esti-mates of their posterior probabilities via Markov chain Monte Carlo (MCMC). These probabilities can be further used as weights for model averaged predictions and estimates of the parameters of interest. As a result, variance components due to model …
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Identification of relevant predictors of loan default using the Elastic Net model
The timely prediction of loan default plays an important role in lending decisions and monitoring loans. However, there has been little development of models for the selection of relevant variables for the prediction of loan default. This study identifies financial and economic indicators for the …
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THE INFLUENCE OF ENVIRONMENTAL VARIABLES ON PREDICTING RARE-PLANT HABITAT IN THE NEZ PERCE NATIONAL FOREST
… the biophysical requirements and distribution of plant and animal species. Many of these modeling efforts use different variants of essentially the same topo-climatic variables (elevation, slope, aspect, precipitation, and temperature). However, these commonly used variables may not …
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THE INFLUENCE OF ENVIRONMENTAL VARIABLES ON PREDICTING RARE-PLANT HABITAT IN THE NEZ PERCE NATIONAL FOREST
… the biophysical requirements and distribution of plant and animal species. Many of these modeling efforts use different variants of essentially the same topo-climatic variables (elevation, slope, aspect, precipitation, and temperature). However, these commonly used variables may not …
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Predictors of Abstinence, Safer Sex & Higher Risk Sexual Behaviors At A Historically Black College & University
… to examine the sexual behaviors and practices of African American college age students (n=681) attending a Mid-Atlantic HBCU. The majority of participants were women (72%) and sexually attracted to men (69%); the mean age was 20 (SD=1.3). The primary purpose of this research was to explore …
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Synthesis of Local Thermo-Physical Models Using Genetic Programming
… involve implicit computational procedures and often complement them to accelerate computation for real-time optimization and control. Human-centered strategies for development of these models are based on approximation of theoretical models. Genetic Programming (GP) system can extract knowledge …
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The Geriatric Cancer Experience in End of Life: Model Adaptation and Testing
The National Institutes of Health recommends the development of conceptual models to increase rigor and improve evaluation in research. Validated models are essential to guide conceptualizations of phenomena, selection of variables and development of testable hypotheses. Structural equation …
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Development of a Risk Prediction Tool for Emergency Laparotomy
… surgery based on easily obtainable preoperative variables that predict useful outcomes for clinicians and patients. Methods: A systematic review was used to establish individual risk factors for emergency laparotomy. Clinicians were asked about their current use of risk prediction tools and how …
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Factors That Influence Medicare Part A Beneficiaries' Length of Stay in the Nursing Home, After a Hospitalization
The purpose of this study was to begin testing of a downward cross-level model for studying the ability of older adults to transition from a nursing home after a Medicare Part A reimbursed stay. Transitions are known to be a weak point in the provision of healthcare to older adults and thus far, …
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Three essays in macroeconomic forecasting using Bayesian model selection
This thesis explores several aspects of Bayesian model selection in time series forecasting of macroeconomic variables. The contribution is provided in three essays. In the first essay (Chapter 2) I forecast quarterly US inflation based on the generalized Phillips curve using econometric methods …
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Recidivism among ex-combatants of illegal armed groups in Colombia: An analysis of participants in the reintegration process
… armed group (IAG) and demobilisation history variables influenced reoffending and crime severity in a sample of 16,834 ex-combatants from IAGs in Colombia, who were registered into the reintegration programme (RP) in 2006 and were monitored during a two-year ‘time at risk’ period. The purpose …
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Foraging Ecology And Habitat Selection Of The Western Yellow Robin (Eopsaltria Griseogularis) In A Wandoo Woodland, Western Australia : Conservation Ecology Of A Declining Species
… study examined the foraging ecology and habitat selection of the Western Yellow Robin in Wandoo Woodland at Dryandra Woodland, Western Australia. The foraging ecology component was comprised of an examination of foraging behaviour, perch-use selection and pounce-site characteristics. The habitat …
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Analysis of Volatility Between Macroeconomic Variables and Busan Port Cargo Throughput According to Global Risks
… shocks in global and domestic macroeconomic variables, and how their relative importance changes over time. The selection of variables was based on a combination of a Systematic Literature Review (SLR) and semi-structured interviews (SSI). The econometric analysis applied a stepwise …