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.
Results
Showing 1 to 20 of 307 for “"Explanatory variables"”.
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Influence of missing explanatory variables and longitudinal assessments in breast cancer clinical trials
… this thesis, the influence of missing data on explanatory variables in time-dependent Cox model analysis is explored, with application to breast cancer clinical trials. In particular, imputation in the context of time-dependent covariates that may be informative missing data which is described …
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Robust and Constrained Dimension Reduction
… and reduces dimensionality by replacing the explanatory variables with a small number of composite directions without losing much information. However, the estimates by CANCOR are sensitive to outliers. In this dissertation, a weighted canonical correlation method (WCANCOR) is developed to …
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Issues in Credit Risk Assessment in Agricultural Credit Markets
Four explanatory variables: DA, wcVFP, ROA, and TDCLR are selected based on different criteria to determine the creditworthiness of borrowers. Predictability of the estimated model for default is compared with the actual data. Classification accuracy is utilized with the discrete models, while RMSE …
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Structural Change in the u.s. Soybean and Soybean Products Markets: A Systematic Varying Coefficient Simultaneous System Approach (United States)
… effect of changes in various demand and supply variables on prices, storage utilization and processing levels of soybeans, soyoil and soymeal. Structural change is present when the dependent variable responds differently to a per unit change in explanatory variables over time. In this study …
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An empirical examination of factors that influence venture capital investment and the location of funds
… financing. This thesis tests the significance of explanatory variables for investment in venture capital at both the national and regional levels. The explanatory variables predicting national new investment in venture capital include capital pins tax rates, stock market pricing, risk premiums, …
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Estimation of run times in a freight rail transportation network
… A correlation analysis is conducted to identify explanatory variables that capture predictable sources of delay and influence run times for use in a regression model. A regression model is proposed utilizing the following explanatory variables: rolling historical average, congestion window, …
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A Statistical Approach to Modeling Wheel-Rail Contact Dynamics
… the traction forces and the wheel-rail contact variables. The experimental data is used to entertain parametric and non-parametric statistical models that efficiently capture this relationship. The study starts with single regression models and investigates the main effects of wheel load, …
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Spatial analysis of cycling risk in Helsinki using crowdsourced risk exposure data
… regression models were constructed to identify variables affecting cycling risk, using infrastructure data and traffic safety survey responses. The results reveal significant spatial clustering of cycling risk in Helsinki and show that areas with the highest absolute risk differ from those with …
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Maintenance trend analysis of air conditioning systems for ship operations in the Arabian Gulf
… tempo (OPTEMPO), and temperature factors as explanatory variables in the model. The results of the regression analysis indicate the model does not provide evidence of increased maintenance costs of A/C systems for operations in the Gulf. Based on the inconsistencies in the maintenance data …
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Recent versus lifetime intermetropolitan Brazilian migration: Estimates of a multinomial logistic model
… by a set of would-be migration determinants (explanatory variables) on migration decision, and to compare the responses of migrants, given their personal attributes, to these determinants.
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An analysis of depot level maintenance for the H-60 helicopter under an integrated maintenance concept
… labor costs and aircraft age and employment as explanatory variables direct material costs showed a higher correlation: for total direct costs, these two variables explained 34.4 percent of the variation. Incorporating additional explanatory variables, such as flight hours prior to SDLM, may …
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Estimating Pedestrian Crashes at Urban Signalized Intersections
… to estimate the number of crashes using a set of explanatory variables. The highway safety community has used modeling techniques to predict vehicle-to-vehicle crashes for decades. Specifically, generalized linear models (GLMs) are commonly used because they can model non-linear count data such as …
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The impact of measurement scale on classification performance of inductive learning and statistical approaches
… investigate the impact of measurement scale of explanatory variables on the relative performance of the statistical method (probit) and the inductive learning method (ID3). In addition, the impact of correlation structure on the classification behavior of the probit method and the ID3 method is …
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How negative sampling provides class balance to rare event case data using a vehicular accident prediction project as a use case scenario
… higher count of entries often leads to a lack of explanatory variables, and vice versa. In the research spectrum of rare event case probability prediction, several methods of data sampling exist to remedy the main issue of rare event case data: a lack of data to collect and learn from. The most …
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Characterization and prediction of air traffic delays
… both temporal and network delay states as explanatory variables. In addition to local delay variables that describe the arrival or departure delay states of the most influential airports and origin-destination (OD) pairs in the network, we propose new network delay variables that depict the …
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Estimating injury mortality in South Africa and identifying urban-rural differences
… for injury deaths, and to gain insight into the explanatory variables for homicide in metropolitan- and non-metropolitan (metro- and non-metro) areas. The literature review describes the global and national estimates of injury mortality and reports higher rural than urban injury mortality rates …
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Participatory resources and African American voter turnout: A comparative analysis of the 1992 and 1996 presidential elections
… socioeconomic, socioreligious, and political variables. In analyzing data from the 1992 and 1996 National Election Studies, the thesis reveals that Whites disproportionately have a higher rate of voter turnout as compared to African Americans. The data further suggest that socioreligious …
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Determinants of wet season landscape and forage selectivity by cattle on farm Kiamsab West 364, central Namibia
… species diversity (H'), cover, and biomass were explanatory variables in the Canonical Correspondence Analysis (CCA) to identify landscape selection determinants. The Chi-Square Test of Association revealed that cattle exhibit selective foraging behaviour (χ² = 17.416, df = 2, p = 0.001). The JSI …
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Estimating the number of cars in UK and US households
… of some rarely-investigated and conventional explanatory variables, including: ethnicity, accommodation tenure, settlement nature, mental belief, environmental concern, geographical regions, household structure, driving licence, number of household income earners and household income, on car …
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Is there a nexus between budget transparency and sound fiscal management in Kenya?
… foreign grants and budget deficits were the explanatory variables of the study as proxies for public finance and fiscal reforms. The bounds test established presence of a long run relationship between the depended variable (budget absorption rates) and the explanatory variables namely: grants …
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