Digital Commons Network^™

Blind Change Point Detection And Regime Segmentation Using Gaussian Process Regression, Sourav Das

Theses and Dissertations

Time-series analysis is used heavily in modeling and forecasting weather, economics, medical data as well as in various other fields. Change point detection (CPD) means finding abrupt changes in the time-series when the statistical property of a certain part of it starts to differ. CPD has attracted a lot of attention in the artificial intelligence, machine learning and data mining communities. In this thesis, a novel CPD algorithm is introduced for segmenting multivariate time-series data. The proposed algorithm is a general pipeline to process any high dimensional multivariate time-series data using nonlinear non-parametric dynamic system. It consists of manifold learning …

Cable Health Monitoring System Built Into Power Converter Using Time Domain Reflectometry, Hossein Baninajar

Theses and Dissertations

Aging cables are a critical reliability concern for many electrical systems. Cables run over long distances, are often exposed to harsh environments and are intended to work for several decades. Cable faults can be a serious problem because cables are usually hard to repair or replace. Condition based maintenance is a popular approach that provides high reliability and low maintenance cost at the same time. This is a non-destructive method that collects information about the health condition of the cable under test without causing any potential damage.

Nowadays, in several applications power cables are connected to power converters and it …

Emergence Of Stranger Fear In Preschoolers With Fragile X Syndrome And Idiopathic Autism Spectrum Disorder, Jessica Scherr

Theses and Dissertations

This study investigated multiple behavioral indicators of social fear and their relationship to symptoms of autism in preschool boys with atypical and normative development using a stranger approach design. Participants consisted of 101 male preschoolers that were categorized into four groups: boys with fragile X syndrome (FXS; N= 29), FXS with elevated autism symptoms (fxASD; N = 25), idiopathic autism spectrum disorder (iASD; N = 11), and typically developing boys (TD; N = 36). Results indicated specific behavioral responses to a stranger differentiated preschoolers with more severe symptoms of autism (e.g. fxASD and iASD groups) from those with low autism …

Supercritical Carbon Dioxide Treatment Of Natural Biomaterials For Tissue Engineering Applications, Dominic M. Casali

Theses and Dissertations

The number of people requiring an organ transplant in the United States has increased considerably over the past 25 years, but the number of organ donations has stagnated; over 8,000 people now die annually while awaiting a transplant or become too sick to receive one. Tissue engineering (TE), the design and production of artificial tissues and organs in vitro, has been proposed to alleviate this problem. Though synthetic polymers offer tunable mechanical and biochemical properties, natural biomaterials have recently garnered attention in TE for their high degree of biocompatibility and ability to direct cell proliferation and constructive tissue remodeling. Yet …

The Private University Faculty Perspective Of Community College Transfer Students: An Ethnographic Interview Study, Sally E. Hyatt

Theses and Dissertations

Faculty/student relationships have a significant impact on student retention and success (Tinto, 1975, 1993). However, little is known about how faculty perceive community college transfer students and how they make meaning of their interactions with these students. This qualitative, descriptive, ethnographic interview study describes faculty/student interaction and the ways in which community college transfer students are perceived by the faculty at one small, private, nonprofit, masters-level university. The research questions used for this study were designed to investigate the faculty’s perception of community college students, the students’ academic experiences and the faculty/student relationship.

The researcher gathered data during 12 in-depth …

African American End-Stage Renal Disease And Medication Adherence: What Are The Effects Of Everyday Racism?, Tamara Estes Savage

Theses and Dissertations

This dissertation explored the racial medication adherence disparity in end-stage renal disease (ESRD) patients. Prior research suggests that there are poor rates of medication adherence in the African American ESRD population. However, the reasons for this racial inequity are not understood. This dissertation explored the impact of everyday racism in the healthcare system in general and dialysis centers in particular on medication adherence. To gain an understanding of the possible contribution of everyday racism to medication nonadherence, Critical Race Theory (CRT) was used as the theoretical foundation of the study.

A total of 46 African American ESRD patients participated in …

Student Involvement As A Mediator Of The Relationship Of Peer Leaders In First-Year Seminars To Academic Achievement And Persistence, Liyun Zhang

Theses and Dissertations

Peer leaders as a component of First-Year Seminars (FYS) are designed to assist in the adjustment, satisfaction and persistence of first-year college students. Although previous studies have consistently found the positive and direct impact of peer leaders on first-year students’ academic achievement and persistence, there is still a lack of clear understanding on why peer leaders have this positive relationship with students’ academic achievement and persistence. Thus, drawing on Astin’s theory of student involvement for higher education (1984, 1993, 1996), and Tinto’s interactive theory of departure (1993), this short term longitudinal study examined the process through which peer leaders resulted …

Longitudinal And Geographical Modeling Of Circular Data With An Application To Sudden Infant Death Syndrome, Xinyan Cai

Theses and Dissertations

The aim of this thesis is to study seasonality of death in U.S. infants who died from SIDS. We also propose to investigate secular trends and geographical patterns of seasonal patterns of mortality. The application of circular statistics is used to describe the seasonality of the month of death in infants who died from SIDS in 1990, 2000 and 2010. The secular trends of seasonal patterns of SIDS mortality are investigated using a circular linear regression model after adjusting for potential confounders. The geographical variation in seasonal patterns of SIDS mortality is explored from the U.S. map and quantified by …

Three Studies Of Service-Learning As An Approach To Movement Integration In Elementary Classrooms, Robert D. Michael, Jr.

Theses and Dissertations

This dissertation consists of three studies that examine service-learning (SL) as an approach to incorporating movement integration (MI) in elementary classrooms as part of a comprehensive school physical activity program (CSPAP). All three studies attempt to advance the knowledge base about using partnership approaches to supporting schoolbased physical activity promotion.

The purpose of study one was to examine the perceptions of preservice classroom teachers (PCTs), classroom teachers (CTs), and course instructors who participated in a constructivist-guided university course with a focus on MI and a SL component. Focus groups with 172 PCTs and individual interviews with 7 CTs and 4 …

Applications Of Multimedia Resources Developed As Part Of The Virtual Cell Animation Collection In Undergraduate Introductory Biology, Eric Edward Goff

Theses and Dissertations

Calls for reform in undergraduate STEM education have arisen from an increased need for well-trained biology graduates in the future scientific workforce. To address this need, many institutions have focused on a pedagogical restructuring of instructional practices to promote deeper conceptual understanding of core biological concepts. This study investigates the implementation of multimedia resources as a possible reliable supplement to undergraduate introductory biology and aims to provide empirical evidence on the instructional best practices of their use. As a central part of this study, we focus on one specific multimedia package, the Virtual Cell Animation Collection, due to its developmental …

Analysis Of Food Exposures In Foodborne Disease Outbreaks, Alecia T. Alianell

Theses and Dissertations

Foodborne illness remains a serious public health problem in the United States in general as well as South Carolina in particular. Obtaining good food ingestion histories as well as possible risky environmental exposures is one of the earliest, most important tasks to complete in any foodborne outbreak investigations. Because time is of the essence in investigations, we have evaluated a rarely used biostatistical method, Random Forests, to data obtained from DHEC. Random Forests has the potential to facilitate more rapid identification of foods or environmental exposures that may be associated with outbreaks. We also examined previous cases of salmonellosis using …

Contesting The Generic Refugee: Siv Identity, Community, And Agency During Resettlement, Benjamin J. Sylvester

Theses and Dissertations

This thesis examines the complexity of identity and community formation by Special Immigrant Visa (SIV) holders during resettlement in Columbia, South Carolina. It explores the ways in which identities coalesce around various themes, such as religion, gender, and military service, how these identities serve to create, expand, and claim membership in communities, and how SIVs exercise agency throughout these processes. Through semi-structured interviews with 9 SIVs in Columbia, SC, this qualitative study highlights the unique, highly individualized ways in which a select group of refugees experience resettlement, how they negotiate their placement within socio-economic hierarchies, and exercise agency to obtain …

Adoptees’ Experiences With Direct-To-Consumer Genetic Testing: Emotions, Satisfaction, And Motivating Factors, Anna Childers

Theses and Dissertations

Public awareness of the role of genetics in disease continues to expand along with the use of direct-to-consumer genetic testing (DTC-GT). One subset of customers taking advantage of the growing DTC-GT market is adoptees. Prior research has shown that adoptees appear to be more motivated than non-adoptees to learn about their genetic disease risk but have similar responses to health-related information acquired through DTC-GT. In this exploratory qualitative study, fourteen adoptees were asked about their motivations for pursuing DTC-GT; satisfaction with results; emotions throughout the process; and interest in meeting with a genetic counselor. Motivations for pursuing DTCGT fell into …

The Effects Of A Summer Reading Program On Reading Achievement And Reading Motivation, Marcia Seawright

Theses and Dissertations

Research shows that children who read books often, both in and out of school, are likely to develop better reading skills than children who have fewer opportunities to read. (Allington, 2012). While many school districts are successfully implementing various opportunities to support students’ reading development during the academic year, problems arise when students are away from school during the summer months. Studies also show that students who read below grade level at the end of third grade are six times more likely to eventually leave school without a high school diploma (National Research Council, 1998). The purpose of this combined …

Environmental Negotiations Cherokee Power In The Arkansas Valley, 1812-1828, Cane West

Theses and Dissertations

In the early 19th century, the Arkansas River Valley existed as a borderlands region of powerful Indian nations and immigrant Euro-American and Native American settlers. In the resulting contests over settlement, Cherokee chiefs recreated the Arkansas Cherokees' ecological identity from hunters to agrarians to differentiate themselves from their Osage and white rivals. During the 1820s, Cherokee chiefs expanded on their agrarian rhetoric by appropriating American scientific systems in order to stymie white settlement. By the end of the 1820s, Arkansas Cherokee chiefs had infused their arguments of preferred agricultural lands, appropriate survey methods, and accurate cartography into the debates over …

The Effect Of Social Exclusion On Shoplifting, Christopher Ling

Theses and Dissertations

This dissertation examines the effect of social exclusion on shoplifting. Shoplifting is a serious problem for marketers, yet surprisingly little attention in the literature has been paid to its underlying social factors. The current research therefore seeks to document conditions under which, and the process through which, consumers may engage in aggressive behavior in the form of shoplifting. Supporting the proposition that shoplifting is an antisocial response to social exclusion that depends on prior shoplifting experience, four studies provide evidence that prior shoplifters (vs. nonshoplifters) are more likely to shoplift again when they are socially excluded because they expect that …

Mast Cells And Lipid Cross-Talk In Skin Inflammation, Piper Alexandra Wedman

Theses and Dissertations

Atopic dermatitis (AD) is an inflammatory skin disease whose pathogenic mechanisms remain unclear. Using a validated human AD-like mouse model, we observed that skin remodeling started at a pre-symptomatic stage of AD that included cellular infiltration of the hypodermis, accompanied with activated/degranulated mast cells (MC). Local MC activation was quantified using a novel method of computer-assisted image analysis we developed and reported. Using a variation of this method, we defined morphometric parameters allowing for quantitation rather than scoring of cellular infiltration. Cell recruitment correlated with MC activation, chemokine production and increased levels of sphingolipid sphingosine-1-phosphate (S1P), produced by sphingosine kinase-1 …

An Evaluation Of Scenic Design, William Baxter Engle Iii

Theses and Dissertations

“…Allow me to explain about the theatre business. The natural condition is one of insurmountable obstacles on the road to imminent disaster… Strangely enough, it all turns out well… I don’t know. It’s a mystery” -Tom Stoppard

I embraced this quote a long while ago in a moment of disgust and defeat while working through a flawed process of making theatre. Everything takes too long to complete, nothing works right the first time if ever at all, and ultimately the entire process is a maddening mess. It seems to me that the study and practice of the trade can work …

The Nutrition Assistance Landscape In Afterschool Programs: Understanding The Gap Between Research, Policy, And Practice, Falon Elizabet Tilley

Theses and Dissertations

The Child and Adult Care Food Program (CACFP) aims to increase children’s access to healthful foods in out-of-home care. Approximately half of the 10.2 million children enrolled in afterschool programs (ASPs) are eligible for nutrition assistance through programs like CACFP. Despite awareness of its potential impact on the nutritional status of millions of children, CACFP is underutilized among ASPs and notably understudied in comparison to other federal nutrition assistance programs.

This dissertation addresses key gaps in CACFP research and provides a deeper understanding of the nutrition assistance landscape in afterschool programs by (1) assessing the type of afterschool snacks served …

Tuberculosis Screening In New Healthcare Employees: A Comparison Of Quantiferon®-Tb Gold In-Tube Test And Tuberculin Skin Test, Mary C. Giovannetti

Theses and Dissertations

Background: Streamlining onboarding processes for new hires to maximize efficiency and reduce costs while meeting regulatory requirements is a constant challenge for healthcare systems’ Employee Health staff. Health screening is a required step and includes obtaining a detailed health history, tuberculosis screening, drug screens, immunizations, fit for duty examinations, obtaining medical records, clarification of disability accommodations, pre-work screens, and other tests which are time consuming and result in delays in hire dates. Faced with a high volume of potential new employee hires a major southeast healthcare system was concerned about delays in new hire start dates. The two-step tuberculin skin …

Understanding The Relationship Of Contextual Support, Peer Risk Trajectories, And School Outcomes For At-Risk Youth, Emily B. Mancil

Theses and Dissertations

High school dropout (HSDO) is associated with poor life outcomes across many domains. As such, it is crucial to understand and identify the factors that contribute to HSDO risk early to increase the chance of positive student outcomes. Because students at-risk are heterogeneous, researchers recommend using pattern-centered approaches to identify subpopulations with similar risk profiles to better understand various typologies of risk. This may be a more comprehensive and accurate way to understand students atrisk for HSDO and may facilitate the development of more effective interventions. To date, seven empirical studies have used a pattern-centered approach to examine HSDO. However, …

Non-Dischargeability Of Foreign Student Loans, Andrew Brown

Bankruptcy Research Library

(Excerpt)

Educational loans made, insured, or guaranteed by a governmental unit are not dischargeable in a bankruptcy case, unless the debtor obtains a hardship determination. This is true even if the loan is made, insured, or guaranteed by a foreign governmental unit. The rationale behind making it difficult to discharge student loans via the United States Bankruptcy Code (the “Code”) is to prevent abuses of the educational loan system, specifically students filing for bankruptcy shortly after graduation to discharge their loans.

Various circuit courts have adopted two tests when applying the undue hardship provision of section 532(a)(8). In 1987, the …

Chapter 11 Liquidation And Its Effect On Collective Bargaining Agreements, Dylan Coyne

Bankruptcy Research Library

(Excerpt)

Sections 1113 and 1114 of title 11 of the United States Code (the “Bankruptcy Code”) allow a debtor to reject its collective bargaining agreements and payment of retiree benefits, subject to certain statutory conditions being met. These provisions apply to companies that employ unionized workers who receive compensation and benefits pursuant to a collective bargaining agreement. Both sections, however, only apply to a debtor that is “reorganizing.” Moreover, courts have held that section 1114, which governs the payment of insurance benefits to retirees, permits modification of obligations under a statute, such as the Coal Industry Retiree Health Benefit Act …

Unavoidable Pressure Ulcers: An Ethnonursing Study, Catherine M. Clarey-Sanford

Dissertations

Catherine M. Clarey-Sanford

Loyola University Chicago

UNAVOIDABLE PRESSURE ULCER: AN ETHNONURSING STUDY

In an effort to improve patient safety and the quality of care in the acute care setting, there has been an increased focus on the prevention of adverse events believed to be avoidable. Hospital-acquired pressure ulcers (HAPU) have been listed as one of those adverse events, and hospitals are no longer reimbursed for related costs. However, there are patient conditions and clinical situations in which a pressure ulcer can be deemed unavoidable. In acute care, unavoidable means that the patient developed a pressure ulcer even though the provider …

Cellular Determinants Of Coronavirus Entry Routes, James Thomas Earnest

Dissertations

Coronaviruses (CoVs) represent some of the greatest modern threats to global health. CoVs are zoonotic viruses that generally cause respiratory or enteric infections. The ability of CoVs to move between species and into human populations ensures that CoVs will remain important and dangerous pathogens. Therefore, understanding how CoVs infect different hosts is vital to human health.

CoVs are enveloped and must undergo fusion of viral and host membranes to initiate infection. Viral glycoproteins, called Spike (S) proteins, are responsible for host cell binding and carrying out the membrane fusion reaction. S proteins store energy in their folded, pre-fusion conformation that …

We Can Do Better: Evaluating An Intervention Remedying Caseworkers’ Negative Racial Bias Towards African American Families Involved In Child Welfare, Adrianne Michele Fletcher

Dissertations

Given that U.S. history documents the severing of African-American family ties by isolating parents from each other and their children under slavery, it is imperative that the child welfare system be free of any echoes of that holocaust. Yet many scholars and practitioners who lament negative racial attitude, both implicit and explicit, may continue to contribute to the over-representation of African-American children in the U.S. child welfare system. This study proposes to examine a subcategory of practitioner attitudes, those about the caregivers’ race, and how those attitudes can be altered through a reflective educational experience. Drawing from pre-existing research about …

The Effects Of Alcohol And Traumatic Brain Injury On Neural Stem Cell Responses, Son Trung Ton

Dissertations

Traumatic brain injury (TBI) is a major source of disability in modern societies. However, there are no good pharmacological strategies for treating long-term TBI complications because we do not fully understand the injury processes that occur afterward. Moreover, a significant percent of patients entering the emergency room with TBI have a blood alcohol level above the legal limit. Alcohol use and intoxication is a widespread issue in our society. Binge drinking is the most common way in which alcohol is consumed, and alarmingly, Americans of all age groups binge drink on a frequent basis. Despite the prevalence of alcohol intoxication …

Investigating Novel Methods Of Interaction With Pharmaceutically Relevant Enzymes, Cory T. Reidl

Dissertations

Metalloproteins requiring one or more metal ions for normal function make up 30% of all known proteins, and many critical biological pathways contain at least one metallo-enzyme. Di-nuclear metallo-proteins constitute a large class of these proteins yet we currently lack effective methods of inhibiting these enzymes for the development of new medical therapies, particularly for the discovery of new antibiotics. Our work has focused on developing novel functionalities that selectively interact with di-nuclear catalytic centers, and we are targeting three separate di-zinc-metallo-enzymes that are unique to bacteria and play key roles in their growth and development. These enzymes are DapE, …

The Internalization Of The Model Minority Stereotype, Acculturative Stress, And Ethnic Identity On Academic Stress, Academic Performance, And Mental Health Among Asian American College Students, Hanna Yun-Han Chang

Dissertations

Previous studies in Asian American psychology literature on cultural factors of acculturation and ethnic identity have yielded mixed findings in its relation to psychological outcomes. Furthermore, there is a gap in the knowledge base regarding the internalization of the model minority stereotype and its impact on Asian Americans. Due to Asian Americans' tendency to value academic excellence as a result of socialization by cultural values and family upbringings, this study examined the effects acculturative stress, ethnic identity, and the internalization of model minority on academic stress, academic performance, and mental health.

Results of this study indicated that acculturative stress significantly …

Aging Well In 21st Century America: Towards A Theological Ethics Of Aging, Chrisitan Cintron

Dissertations

As Third Agers transition into life after work they are faced with a renewed challenge, living the good life. The normative images emanating from the social and cultural landscape allow Third Agers to either envision and live their new life, or adopt a course set out for them. These new lives require a re-discovery and re-defining of the self, a reinterpretation of one's role in society, and relationship to others. As with other phases of life, individuals need guidance when confronted with images of living well that are contradictory or perhaps antithetical to what they imagined for themselves. Various social …