The Cox proportional hazards model and the accelerated failure time model are frequently used in survival data analysis. They are powerful, yet have limitation due to their model assumptions. Quantile regression offers a semiparametric approach to model data with possible heterogeneity. It is particularly powerful for censored responses, where the…

The size and dynamism of the Web poses challenges for all its stakeholders, which include producers/consumers of content, and advertisers who want to place advertisements next to relevant content. A critical piece of information for the stakeholders is the demographics of the consumers who are likely to visit a given web site. However, predicting…

Rapid growth in eBusiness has made industry and commerce increasingly dependent on the hardware and software infrastructure that enables high-volume transaction processing across the Internet. Large transaction volumes at major industrial-firm data centers rely on robust transaction protocols and adequately provisioned hardware capacity to ensure…

Internet access in the workplace has become ubiquitous in many organizations. Often, employees need this access to perform their duties. However, many studies report a large percentage of employees use their work Internet access for non-work-related activities. These activities can result in reduced efficiency, increased vulnerability to cyber…

Educational leaders are charged with maintaining the academic success of students, the faith of stakeholders in the educational process, and the growth of the educational profession. These objectives have become difficult during a time of noticeable discontent among the stakeholders of educational systems. The discontent is noted strongly among…

This study investigated the effects of social presence on students' perceived learning and satisfaction in online courses. The participants for this study were 81 graduate students enrolled in four special education online courses offered at a major higher education institution located in a Mid-Atlantic state. Two research questions were used to…

In its report "To Err is Human", The Institute of Medicine recommended the implementation of internal and external voluntary and mandatory automatic reporting systems to increase detection of adverse events. Knowledge Discovery in Databases (KDD) allows the detection of patterns and trends that would be hidden or less detectable if analyzed by…

Successful enrollment management uses predictive modeling to achieve specific goals for admission rates, yield rates, and class size. Many of these models rely on evaluating an applicant's interest in the institution through measures of pre-application engagement. Recent increases in the number of applicants who do not visibly interact with…

The purpose of this study was to investigate--by utilizing data obtained from the Kentucky Community and Technical College System (KCTCS) PeopleSoft database-- whether the American College Testing (ACT) assessment was a predictor of student success for students who had graduated from respiratory, radiography, and nursing programs at Southeast…

Indicators of the proficiency of teacher candidates at applying knowledge of child development to teaching and learning were examined to see if they predict the overall success of the candidates full-time student teaching. The assessment instrument, the Full-Time Student Teaching Summary Report (FSTSR), was found statistically reliable and…

For the past several years, community college presidents have retired at alarming rates. At the same time, institutional needs have shifted and new skill sets are often desired. These changes, coupled with a lack of leader succession plans, budget cuts, and an increased emphasis on accountability, created opportunities for candidates with…

This study looked at the success rate of first-year students in a new program for conditionally admitted students. Logistic regression was used to determine the impact of several pre-college variables, such as high school grade point average and ACT scores, and orientation generated variables, specifically placement test results, on the dependent…

Public schools in America carry the enormous responsibility of educating students to reach their full potential and become productive citizens. Our democracy, culture, and way of life depend on an educated population to sustain the freedoms and liberties that we've come to enjoy in the United States of America. To continue this trajectory, public…

Tinto, Astin and countless others have researched the retention and attrition of students from college for more than thirty years. However, the six year graduation rate for all first-time full-time freshmen for the 2002 cohort was 57%. This study sought to determine the retention variables that predicted continued enrollment of entering freshmen…

This dissertation has two primary concerns: (i) evaluating the uncertainty and prediction capabilities of a nanodiamond drug delivery model using Bayesian calibration and bias correction, and (ii) determining conceptual difficulties of multi-scale analysis from an engineering education perspective. A Bayesian uncertainty quantification scheme…