957 Works

Community College Students with Psychological Disorders and Their Perceptions of Online Learning

Gretchen Winifred Langford Warren
Research focusing on students with learning disabilities is abundant for secondary and higher education. Studies utilizing data on students with psychological disorders cover secondary and 4-year university education. However, community college students with psychological disorders and their perception of online classes is an area of educational research which lacks data. Students across a wide spectrum of psychological disorders tend to find learning challenging. The community college's learning environment may best fit their learning styles. With...

Discovering Career Self-Efficacy Among Rural Community College Students

Tameka Mierelle Womack
Many students report that their main purpose for attending a two- or four-year academic institution is to prepare for a career, and require assistance during the process of selecting a major and career that is appropriate for them. Students who struggle with career indecision often seek help through career counseling and/or computer-assisted career guidance systems. Self-efficacy plays a key role in students' self-esteem and their belief that they can not only choose a career but...

Efficacy of Computer Aided Drafting (CAD) Certifications

Daniel L. Trent
This research investigated the perceived effect of industry recognized Computer Aided Drafting (CAD) certifications among community college drafting instructors and employers. The research questions that guided this study were: (1) Do community college drafting instructors believe that certified drafters perform better on the job than non-certified drafters? (2) Do employers believe that certified drafters perform better on the job than non-certified drafters? (3) Do employers seek CAD certified individuals to fill drafting positions? (4) Is...

Engineering Design: A Cognitive Process Approach

Greg Joseph Strimel
The intent of this dissertation was to identify the cognitive processes used by advanced pre-engineering students to solve complex engineering design problems. Students in technology and engineering education classrooms are often taught to use an ideal engineering design process that has been generated mostly by educators and curriculum developers. However, the review of literature showed that it is unclear as to how advanced pre-engineering students cognitively navigate solving a complex and multifaceted problem from beginning...

Urban Elementary Students' Views of Environmental Scientists, Environmental Caretakers and Environmentally Responsible Behaviors

Patricia Lynne Horne
The purpose of this research was to determine the nature of the relationship between urban elementary fifth graders, environmental workers, and the environment. The study examined 320 urban fifth grade elementary students' drawings of environmental scientists (DAEST) and environmental caretakers (DAECT). Additionally, semi-structured interviews were included to elucidate student illustrations. The study's sample represented one-third of all fifth graders in the mid-Atlantic school district selected for this research. Approximately 5% of participants were chosen for...

Autism Assessment Scale for Children (AASC): The Development of a DSM-V AIigned Questionnaire to Screen School-Aged Children for High Functioning Autism

Christine Hebert
The purpose of this dissertation is to analyze the latent factor structure underlying the Ellis Functional Assessment (EFA) for children with high-functioning autism (HFA), to compare the latent factor structures for under-identified subgroups of children (older children, gifted children, female children), and to design a pre-screening assessment for HFA based on those results. The scope of the study is limited to children who have been identified as having HFA and whose parents completed the EFA...

Adjustment Experiences and Ethnic Identity Attitudes Among High School Students in Advanced Academic Programs

Tiffany Michelle Hall
African American high school students have been historically underrepresented in advanced placement (AP), International Baccalaureate (IB), and dual enrollment (DE) programs. The adoption of more equitable admissions practices has helped many school divisions develop a more ethnically diverse AP, IB, and DE student body. Despite increased African American student enrollment, retaining these students remains an ongoing problem. Equally troubling is the persistent achievement gap that exists between African American and White students in AP, IB,...

A Comparison of Two Theories of Resistance to Innovation in Medical Record Administration Baccalaureate Degree Programs

Joyce Brown-Harvey
Resistance to innovation is a major obstacle to the successful implementation of planned change in colleges and universities. The purpose of this study was to compare two explanations of resistance to innovation to determine which one best explains the variance in receptivity and proposed innovations among faculty members in medical record administration programs. One explanation holds that organizational members' receptivity to change is a function of their personalities. The second explanation holds that members respond...

Two Essays on IPO Earnings Management

Yong Sun
This dissertation includes two essays that study initial public offerings (IPO) earnings management. The first essay examines the underwriter's certification and monitoring roles in IPO earnings management; the second essay explores the relation between IPO earnings management and post-IPO institutional ownership. In the first essay, we investigate the certification role played by underwriters. We hypothesize that there is a negative relation between IPO earnings management and underwriter reputation and that there is a positive relation...

Computational Analysis and Design Optimization of Convective PCR Devices

Jung Il Shu
Polymerase Chain Reaction (PCR) is a relatively novel technique to amplify a few copies of DNA to a detectable level. PCR has already become common in biomedical research, criminal forensics, molecular archaeology, and so on. Many have attempted to develop PCR devices in numerous types for the purpose of the lab-on-chip (LOC) or point-of-care (POC). To use PCR devices for POC lab testing, the price must be lower, and the performance should be comparable to...

Harsh Parenting in Military Versus Civilian Families: Does Military Culture Moderate the Influence of Socioeconomic Status and Race?

Tiren Antinette Parker
Harsh parenting techniques such as yelling and spanking are commonly used in the United States to discipline children, despite the evidence that harsh parenting has a negative sequalae for children that can persistent into adulthood. Socioeconomic status (SES) and race/ethnicity have been identified as two key determinants of harsh parenting. The stressors associated with military service and parenting within military culture place families at increased risk for harsh parenting and child maltreatment. Having a better...

The Impact of Diet And Psychosocial Factors Post Bariatric Surgery

Eva Rani Panigrahi
Bariatric surgery is a medical procedure that has been found to be an effective option for weight loss. Despite the benefits of bariatric surgery, little is known about the psychosocial factors that may impact weight outcome. The present study attempted to examine patients’ level of perceived stress, depressed mood, and diet, and the association of these factors with percent weight loss in the first 6-months after surgery. Eighty patients completed pre- and 6-months post-operative depressed...

Supplemental Instruction, Calibration, and Self-Efficacy: A Path Model Analysis

Jennifer Leigh Grimm
Many students preparing for careers in the fields of science, technology, engineering, and mathematics (STEM) are unable to persist past entry-level courses to complete their college degrees. As a result, many higher education institutions have implemented intervention programs, like Supplemental Instruction (SI), to help students master course content and gain the self-regulated learning (SRL) behaviors necessary for success in challenging STEM courses. Numerous studies have demonstrated that SI attendance is correlated with improved course grades;...

Relationship Between Membership in DECA, An Association of Marketing Students, and Grade Point Average as an Indicator of Academic Success

Michael Frederick Kosloski Jr.
Stakeholders in career and technical education, and more specifically marketing education, tout member benefits of applied learning through career and technical student organizations. However, there is little empirical evidence to support the notion that such student organizations help students to achieve academic gains. As a result, the purpose of this study was to collect and analyze empirical data to determine whether there is a relationship between DECA, An Association of Marketing Students, and academic gains...

Worked Examples in Teaching Queries for Searching Academic Databases

Mary Kickham-Samy
The worked-example effect, an application of cognitive load theory, is a well-supported method of instruction for well-structured problems (Chandler and Sweller, 1991; Cooper and Sweller, 1987; Sweller and Cooper, 1985; Tuovinen & Sweller, 1999; Ward and Sweller, 1990). One limitation is expertise-reversal effect, where advanced students perform less well when exposed to worked examples than when exposed to traditional problem solving (Kalyuga, Ayres, Chandler, & Sweller, 2003; Kalyuga, Chandler, & Sweller, 1998; Kalyuga, Chandler, Tuovinen,...

Project Management Professional Training Needs for Defense Industry Projects

Cole Jerome Kupec II
The purpose of this study was to determine if the Project Management Professional credential requirements encompass the knowledge for project managers required to effectively manage defense industry projects. This study used a four-round Delphi methodology to solicit opinions of defense industry project management professionals about current project management credential curriculum and if that curriculum reflects the realities of the current project management environment. Two research questions guided this study: 1) Do government contractors working on...

An eLearning Narration Modality Study: In Pursuit of Faster, Cheaper, and Almost the Same

Richard David Horner
The purpose of this study is to examine the effects of five different eLearning modality practices on workplace learning and perceived learner satisfaction. Using a factorial posttest comparison design (with a control group), this experimental field study explored the learning effects and learner perceived satisfaction associated with the use of different modality approaches within an eLearning course delivered in a workplace. More than 3,000 study participants, who are part of a U.S. federal workforce, where...

Copula-Based Zero-Inflated Count Time Series Models

Mohammed Sulaiman Alqawba
Count time series data are observed in several applied disciplines such as in environmental science, biostatistics, economics, public health, and finance. In some cases, a specific count, say zero, may occur more often than usual. Additionally, serial dependence might be found among these counts if they are recorded over time. Overlooking the frequent occurrence of zeros and the serial dependence could lead to false inference. In this dissertation, we propose two classes of copula-based time...

Food Habits and Ecology of Beavers in Southeastern Virginia

John Lennox Echternach Jr.
The food habits and ecology of three beaver colonies in James County, Virginia were studied. Vegetation surrounding the colonies was characterized as southern mixed hardwood forest or lowland swamp forest. Stream flow values ranged from 0.013 to 0.369 m3/sec. Water depth ranged from 0.5 60 4.0 m. Caloric value of 13 heavily used woody species ranged from 3305 to 6204 cal/g. Considerable seasonal variation was noted in most species with the lowest caloric values noted...

The Impact of Participation in a Virginia Community College Orientation Program Course on Student Engagement, Satisfaction, Academic achievement, and Retention

Wendy L. Tighe
Participation in an orientation program course and several student engagement and satisfaction factors have been identified as positively related to desirable student outcomes. This study explored student engagement, satisfaction, academic achievement, and retention for students based on their enrollment in an orientation course at Tidewater Community College (TCC) in Virginia. This study used a cross-sectional, static group comparison secondary data analysis approach to explore four research questions. The Community College Survey of Student Engagement (CCSSE)...

Predictors of Persistence Among Community College Adult and Traditional-Aged Students

Kellie Crawford Sorey
Previous literature has documented the high attrition rates for community college students. Beyond raw data, research has demonstrated that predictors of higher education persistence may include a student's background characteristics, a student's external commitments, institutional influences, and a combination thereof. However, empirical research on the persistence of community college students is scarce, and even fewer studies address the differential predictors of persistence between adult and traditional-aged students. The present study examined the predictors of institutional...

Stratigraphy and Depositional Environments of a Late Pleistocene Barrier Island Complex, Southeastern Virginia

Alan K. Jasper
The Norfolk, Kempsville, and Sand Bridge Formations beneath the HIckory Scarp of southeastern Virginia are reinterpreted as representing one glacio-eustatic transgressive cycle. The timing of this transgressive event is set during the earliest Wisconsinan. The formations were previously interpreted as unconformable overlying one another. The Norfolk-Kempsville unconformity is actually a diagenetic boundary. Evidence is presented which indicates that the Kempsville Scarp area should be reduced to member status or dropped entirely.

Performance Modeling and Prediction for the Scalable Solution of Partial Differential Equations on Unstructured Grids

Dinesh Kumar Kaushik
This dissertation studies the sources of poor performance in scientific computing codes based on partial differential equations (PDEs), which typically perform at a computational rate well below other scientific simulations (e.g., those with dense linear algebra or N-body kernels) on modern architectures with deep memory hierarchies. We identify that the primary factors responsible for this relatively poor performance are: insufficient available memory bandwidth, low ratio of work to data size (good algorithmic efficiency), and nonscaling...

An Integrated Risk Analysis Methodology in a Multidisciplinary Design Environment

Katrina R. Hampton
Design of complex, one-of-a-kind systems, such as space transportation systems, is characterized by high uncertainty and, consequently, high risk. It is necessary to account for these uncertainties in the design process to produce systems that are more reliable. Systems designed by including uncertainties and managing them, as well, are more robust and less prone to poor operations as a result of parameter variability. The quantification, analysis and mitigation of uncertainties are challenging tasks as many...

\"Preservation...From the Dangers of the Enemy as Well as Seas\": The Establishment of the Old Cape Henry Lighthouse

Kevin Charles Valliant
As the federal government of the United States began its existence, the Chesapeake Bay had gone without a significant navigational aid for nearly two centuries. What factors then led the newly established government to build a lighthouse on Cape Henry, at the entrance of the Bay? Although the colonial governments of Virginia and Maryland failed to build a lighthouse, their efforts provided the groundwork for the Cape Henry light, which the federal government envisioned not...

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