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 69 for “"Hazard Model"”.
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Development of a human factors hazard model for use in system safety analysis
… amongst themselves. The proposed Human Factors Hazard Model (HFHM) utilizes the established and time-tested probabilistic analysis tools of Fault Tree Analysis (FTA) and Event Tree Analysis (ETA), and integrates them with a newly developed Human Error Probability (HEP) predictive tool. This new …
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Environmental health hazards on under-five mortality in sub-Saharan Africa : analysis using multilevel discrete-time hazard model
Environmental health hazards are pathogens and chemicals in the environment, which can cause health problems. The importance of such environmental factors in child health and survival are acknowledged in the literature. However, empirical researches on the effect of environmental health hazards on …
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On Terrorist Attacks and Estimation Methods
In my thesis I propose a theoretical model of terrorist attacks and anestimation strategy which I compare to existing methods in the literature. The modeling approach was designed with terrorism in mind, but can be applied to other discrete dynamic decision processes with a latent component and a …
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A Cox proportional hazards-cash flow model for bank failure prediction
This research uses the Cox proportional hazard model and bank cash flow information to determine whether adding cash flow information will improve current bank failure prediction methods. In two published papers it has been shown that the Cox model performs as well as other models with respect to …
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Advances in Differentially Methylated Region Detection and Cure Survival Models
… of the dissertation pertains to mixture cure models in survival analysis. Mixture cure models are those based on a cured and uncured population. The choice of models for the cured and uncured is crucial in developing statistical models for this type of population. In this work, a flexible …
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Predictors of Contralateral Breast Cancer In Brca Negative Women
… two groups. Using univariable Cox Proportional Hazard model, thirteen statistically interesting risk factors were found, defined as having a p-value under 0.2. Multivariable stepwise Cox Proportional Hazard model found four statistically significant variables out of the thirteen found in the …
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Natural History and Affecting Factors on Progression of Prehypertension and Prediabetes
… respectively. In the Cox proportional hazard model, changes of CVD risk factors such as abstinence from drink, participating in a regular exercise, and reducing body mass index (BMI) level, and controlling total cholesterol (TC) level played a protective role on progression to HTN in …
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Credit Default Risk and Market Risk Premium of Chinese Corporate Bonds
… in China, this research applies three types of models: accounting-based Altman models, the Merton distance-to-default (DD) model, and the default hazard model. Our findings confirm the robustness of three original Altman models in predicting Chinese corporate bond defaults within a one-year …
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Semi-parametric models for response times and response accuracy in computerized testing
… responses. This broadens the scope of potential modeling approaches because response times can be analyzed in addition to analyzing the responses themselves. Current models for response times,however, mainly focus on parametric models that have the advantage of conciseness, but may suffer from a …
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The Influence of Diversity on Government Durations in Parliamentary Systems
… across 12 countries and applied Cox proportional-hazard modeling to examine the relationships between age and education and the duration of governments in parliamentary systems. The independent variables were age and education level for members of parliamentary governments across central Europe. …
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The initial unemployment duration of immigrants to Khayelitsha/Mitchell's Plain
… to exhibit positive duration dependence as the hazard function increases over time, albeit over long time periods. Estimators for the parameters of a discrete-time hazard model are obtained via maximum likelihood methods. They suggest that the reality of the post-migration urban experience …
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ATTRITION OR RETENTION? EXPLORING 4-YEAR AND 6-YEAR OUTCOMES AMONG NAVY ENLISTED SAILORS
… Survival curve analysis using Cox Proportional Hazard Model to identify predictors of Sailors’ attrition and retention behaviors. Results for 4-year attrition models show that women with either very high (college) or low (GED) educational attainment and Sailors in technical and mechanical …
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Determinants of Sports Performance: Case Studies on Olympics & Major League Soccer
… with Major League Soccer. A proportional hazard model and a multinomial logit model is used in this estimation to examine the ability of teams to remain competitive, where we explore the factors that assists teams in remaining in specific states of competitiveness.
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Modeling Conversions in Online Advertising
… practitioners have developed their own models for predicting purchases. Moreover, online advertising generates an enormous amount of data, long the province of statisticians. My work sits at the intersection of these three areas: marketing, statistics and computer science. Academic …
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Modeling Conversions in Online Advertising
… practitioners have developed their own models for predicting purchases. Moreover, online advertising generates an enormous amount of data, long the province of statisticians. My work sits at the intersection of these three areas: marketing, statistics and computer science. Academic …
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Optimal survival trees ensemble
… inference forest, bagging and Cox proportional hazard model. In addition to improved predictive performance, the proposed method also reduces the number of survival trees in the ensemble as compared to the other tree based methods. Furthermore, the method is implemented in an $R$ package called …
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Empirical study on the motivations of bidders' second tender offer contests
… offer attempt are examined. A multinomial logit model is used to examine the rationales for bidders attempting a second acquisition. The results are consistent with the management entrenchment and the convergence-of-interest hypotheses. Also, a binary logit model is applied to examine the …
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Discrete survival models with flexible link functions for age at first marriage among woman in Swaziland
… of exible link functions in discrete survival models through a simulation study and an application to the Swaziland Demographic and Health Survey (SDHS) data. The objective of the research study is to perform simulation exercises in order to compare the e ectiveness of di erent families of link …
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Pretreatment Serum CYFRA 21-1 Level Correlates Significantly with Survival of Cervical Cancer Patients: A Multivariate Analysis of 506 Cases
… A multivariate analysis using Cox’s proportional hazard model was performed to evaluate the prognostic significance of pretreatment variables. In patients who underwent radical hysterectomy, there was a significant correlation between pretreatment serum SCC-Ag/CYFRA 21-1 levels and patient age, …
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Assessing the Seismic Hazard in Charleston, South Carolina: Comparisons Among Statistical Models
Seismic hazard calculations for sites in eastern North America have traditionally assumed a Poisson process to describe the temporal behavior of earthquakes and have employed the Gutenberg-Richter relationship to define the frequency distribution of earthquake magnitude. For sites in areas where …
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