Digital Commons Network^™

On The Microstructural Behavior Of Pure Magnesium Under Various Strain Rates, Peter Malchow

Theses and Dissertations

An investigation into the localized microstructural response of pure magnesium under both quasi-static and dynamic loading is presented in the form of several experimental works. The meso-scale events were examined using Digital Image Correlation techniques, which provide a methodology for mapping the in-situ full-field material strain behavior.

Firstly, an analysis of the grain boundary activity specifically under dynamic conditions at high magnification is discussed. An area of interest in the region of multiple grain boundaries and triple junctions is selected for characterizing the evolution of the strain and local rotation. This is followed by a study experimentally verifying the causes …

Pedagogy Of The Transplanted: A Study Of Selected First-Year Jamaican Immigrant Elementary School Teachers And Their Perspectives On South Carolina’S Curriculum Processes, Claudia Fletcher-Lambert

Theses and Dissertations

The study explores the experiences of four first-year Jamaican immigrant teachers in rural southern South Carolina regarding their descriptions of the experiences and the researcher’s observations. The main research question was concerned with first-year Jamaican immigrant elementary school teachers’ experiences as they navigate the curriculum landscape in South Carolina. The inquiry engages a qualitative research design.

Interviews, observations, and artifacts were engaged to collect data. These data were analyzed deductively and inductively through a process of content analysis. These data findings in the study covered four dominant themes these included immigrant teachers’ strengths, challenges, changes, and navigation strategies. The data …

Flannery O’Connor’S Art And The French Renouveau Catholique: A Comparative Exploration Of Contextual Resources For The Author’S Theological Aesthetics Of Sin And Grace, Stephen Allen Baarendse

Theses and Dissertations

Flannery O’Connor described herself as “a Catholic peculiarly possessed of a modern consciousness” (HB 90). What makes her such a fascinating author is that she was almost uncannily sensitive to what Charles Taylor has analyzed in his large study A Secular Age as the fraught spiritual cross-currents of late modernity. Decades before Taylor described the modern secular social imaginary as a haunted space, O’Connor wrote in an essay that “if the South is hardly Christ-centered, it is most certainly Christhaunted” (MM 44). She interpreted the freak “as a figure of our essential displacement” (45). What Taylor works out about the …

Enhanced Dropwise Condensation Via Wettability Contrast Mechanism, Mohammad Alwazzan

Theses and Dissertations

Condensation heat transfer performance can be improved by many methods including the most common used method, which is by increasing the droplet removal rate of the condensing surface. Commonly, this approached can be achieved by promoting a dropwise condensation mode in which super/hydrophobic coatings can be applied on the entire condenser surface to reduce the surface wettability degree. In this dissertation, two main approaches were adapted to enhance the condensation heat transfer performance of the condensing surface via wettability contrast mechanism. Three approaches of investigation were performed to better understand such dropwise condensation promoter methods.

In the first part, alternative …

Marine Phosphorus Biogeochemistry Ecological Insights From Analytical Chemistry, Douglas W. Bell

Theses and Dissertations

The supply of phosphorus (P) directly impacts the growth and speciation of marine microbes (i.e., phytoplankton, bacteria, Archaea). In turn, microbial communities shape the magnitude and rate of marine biogeochemical cycles, ultimately affecting global climate and food production. This dynamic reflects the continuum of temporal and spatial scales at which the marine P cycle operates. However, linking multiple scales of cycling remains a consistent challenge. The primary objective of my dissertation was to gain insight into marine P biogeochemistry, by means of analytical chemistry, at the molecular and environmental scales of cycling. The first component of my research was to …

Mercury Bioaccumulation In Three Popular Subsistence And Recreational Estuarine Fishes From Southeastern U.S.A., Taylor Cannon

Theses and Dissertations

A rising concern in recent years has occurred over the presence of methylmercury in seafood, particularly fishes, and its impact on human health. However, fish also provide many health benefits, including improved cardiovascular health and neurodevelopment. Because fishes are the main source of methylmercury exposure to humans, and are such an integral part of the human diet, understanding the risks versus the benefits of fish consumption is imperative in allowing the public to make healthy, educated choices. One way that state and federal governments attempt to do this is through issuing fish consumption advisories. Unfortunately, these advisories do not always …

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 …

Mobile Application For Shipping Goods For Individuals And Truckers In India, Sendurr Selvaraj

Theses and Dissertations

India is a vast country with majority of its cities and towns connected through roads. Road transportation contributes to 86% share of the freight transport of the country with trucking companies dominating the entire space. With growing economy and demands raising, the quality of service of the trucking company remains poor. The major reasons are unorganized practice and lack of transparency. Moreover, limited access for customers to reach out to truckers to transport their goods.

This thesis aims to create a platform for customers and truckers to realize their needs with a help of a mobile application. Customers can search …

Risky Business: Case Study Pedagogy And Business Communication, Jonathan A. Maricle

Theses and Dissertations

When Harvard College built their business school curriculum around case studies and discussion-based classrooms in the early 1900s, it created a radical shift in business school pedagogy throughout the nation due to its ability to prepare students for careers in industry. As case study pedagogy spread to other fields throughout the 20th century, such as medical education and the sciences, these fields extended Harvard's approach in order to create highly effective, field-specific pedagogies. However, business communication is yet to develop their own field-specific approach to case study pedagogy that meets the unique needs of our educators and students. I argue …

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 …

Co2 Capture From Flue Gas By A Psa Process Using A Novel Structured Adsorbent, Nima Mohammadi

Theses and Dissertations

First adsorption equilibrium isotherms for N2, O2, Ar and CO2 on zeolite 13X were measured at three temperatures (25, 50, 75 °C) and pressures up to 110 kPa with a volumetric method and validated by also measuring the same isotherms with a gravimetric system.

Then a comprehensive 2-D mathematical model was developed to study the fundamentals of adsorption processes in parallel channel structured adsorbents. The results clearly indicated that under studied circumstances the plug flow condition can be assumed and therefore the system is not subject to premature breakthrough.

The pressure drop of corrugated structured adsorbents with narrow triangular channels …

The Effects Of Student Involvement In Writing Topic Selection On Achievement And Motivation, Henry D. Tindal

Theses and Dissertations

This action research study examined 18 high school student-participants’ perceptions of essay writing both with teacher-generated standardized prompts and prompts where students were included in the development of the writing assignment. The students consisted of 12 white females, 2 Asian females, and 4 white males enrolled in an Advanced Placement English Language and Composition class from a rural, southern school located in South Carolina. Quantitative methods were used to determine the impact of the prompts on the students’ motivations for writing essays. Writing samples, surveys and observations comprised the data. Teacher-participants and instructional leaders reflected on the data with the …

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 Act Keytrain Program And The Act Workkeys Test Performance: An Action Research Study, Matthew T. Thompson

Theses and Dissertations

The purpose of this quantitative action research study was to describe the effectiveness of the American College Testing (ACT) KeyTrain program in the South Carolina Department of Corrections (SCDC), conducted with 50 inmate-student-participants who were enrolled in the Palmetto Unified School District’s Tyger River High School’s (TyRCI) adult education program. The identified problem of practice for this dissertation in practice (DiP) was an evaluation of the effectiveness of this program for one group of low socioeconomic status Black male inmate-student-participants. This evaluation was of vital importance to the Palmetto Unified School District (PUSD) and SCDC because ACT WorkKeys is one …

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 …

A Professional Learning Community For Novice Teachers At A Title I Elementary School: An Action Research Study, Marie Putnam Havran

Theses and Dissertations

The present study describes the effect of a professional learning community (PLC) for novice teachers at Greenville Elementary, a Title I elementary school in the southern United States. The identified problem of practice at this school involves novice teachers who are required to participate in a district-approved Assisting, Developing, and Evaluating Professional Teachers (ADEPT) model as the teacher evaluation program in addition to maintaining a portfolio of their work experiences. The participant-researcher wondered if this affected novice teacher’s self-efficacy in the classroom with children of working-class poor, and if a PLC aimed at increasing their feelings of self-efficacy would be …

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 …

Rational Synthesis Of Catalysts For Biomass Conversion, Qiuli Liu

Theses and Dissertations

With climate change due to global warming, the production of hydrocarbon fuels and chemicals from renewable biomass resource has become more pressing in recent decades. The biggest challenge in biomass conversion is to develop active, selective and stable catalysts for particular applications. The objective of this research is to optimize catalytic performance for hydrodeoxygenation (HDO) and hydrogenation reactions by enhancing the stability of the support, tuning metal particle size, and controlling surface composition.

The high content of water in bio-oil and the aqueous environment of the upgrading process requires a hydrothermally stable catalyst. The hydrothermal stability has been effectively improved …

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 …

In The Way Back, Mark Rodehorst

Theses and Dissertations

This is a collection of poems that explores the intersection of place, memory, culture, and identity.

Conversations With Chris: Discussing Racial Diversity In A Professional Book Club, A. Brennan Davis

Theses and Dissertations

The purpose of this qualitative action research study was to understand and describe the experiences and the effects of one high school teacher’s membership in a professional development book club focused on issues of racial diversity with the overall aim of change toward equitable teaching practices through the following actions: confronting personal biases, discussing and reflecting on personal experiences and beliefs, questioning and critiquing personal beliefs and teaching practices, interacting with other professionals and with the readings in a supportive environment in which we celebrated and supported articulations of social justice or positive change. Thematic analysis was used to analyze …

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 …