Digital Commons Network^™

Relative Hazard Losses Along The Atlantic And Gulf Coasts, Erin Kemp

Theses and Dissertations

Coastal areas face a variety of natural hazards, many of which are increasing in frequency or severity due to climate change. Continued coastal development emphasizes the need for a better understanding of the impact of these hazards on coastal communities. This study aims to improve this understanding by investigating temporal, spatial, and causal patterns in county-level relative losses (RL) from hazards along the Atlantic and Gulf Coasts from 2001 to 2021. Three research questions are addressed: 1) Are relative losses increasing over time in coastal counties? 2) Where are the highest relative losses among coastal counties? and 3) Which hazards …

An Efficient Detection And Deep Clustering Based Pipeline For Reliable Rodent Ultrasonic Vocalization Analysis, Sabah S. Anis

Theses and Dissertations

Ultrasonic vocalizations (USVs) are critical for understanding rodents' emotional states and social behaviors. However, manual analysis of USVs is time-consuming, subjective, and prone to errors. This thesis presents an automated pipeline that addresses these challenges by performing efficient USV detection and clustering. The proposed approach significantly reduces the time and effort needed to analyze USV data while improving accuracy and reproducibility.

To address this gap, we introduce ContourUSV, a five-step pipeline for USV detection. First, it begins with generating spectrograms from audio recordings, which are then pre-processed to enhance the contrast between USVs and background noise. Key steps include median …

Exploring Cultural Capital And Literacy Practices In Chinese Immigrant Families: A Critical Ethnographic Case Study, Yuechen Sun

Theses and Dissertations

This dissertation explores the cultural capital and literacy practices of Chinese immigrant families residing in a Southeastern U.S. city. Using an ethnographic case study approach, the research examines two groups of Chinese immigrant parents: those with higher educational backgrounds and those who are restaurant owners. The study investigates how parents’ educational and cultural backgrounds influence their perceptions of and commitments to their children’s education, as well as their home literacy practices. It also explores their understanding of the model minority stereotype and their views on educational equity in the U.S. The findings reveal that both groups of parents value education …

Professional Learning Communities And Digital Literacy: A Framework For Elementary Education, Lauren Hunt

Theses and Dissertations

As digital technologies redefine the definition of literacy, elementary teachers face the challenge of effectively integrating digital literacies into their classroom spaces. This dissertation examines how professional development can enhance teachers’ understanding and implementation of high-quality digital literacy practices. Grounded in the New Literacies framework, the study identifies key characteristics of effective digital literacy instruction and explores how professional development that is contextualized, meaningful, and sustained can foster these practices. Using data from classroom observations, professional learning communities, and teacher interviews, the research highlights how individualized coaching and collaboration empower teachers to create authentic, engaging, and critical digital literacy experiences. …

Post-Selection Inference In Regression Models, Qinyan Shen

Theses and Dissertations

This dissertation develops new methodology for valid statistical inference following model selection in various regression settings. We first consider the logistic regression model for a binary response that can only be observed at the group level, as in group testing, and is subject to testing error. With the true responses only partially observed, we employ the expectation-maximization (EM) algorithm to account for missing information in the response data and simultaneously conduct variable selection using the LASSO-penalized log-likelihood function. After variable selection, we extend an existing post-selection inference method based on the polyhedral lemma \parencite{lee2016exact} to make inferences on selected covariates, …

Exploring Technology Use And Loneliness Among African American Older Adults, Sarah Pace

Theses and Dissertations

Loneliness among African American older adults is a pressing public health concern, affecting more than one-quarter of this population and increasing the risk of premature death. This study explores the experiences of loneliness among African American older adults and examines the technologies they use, the purposes they serve, and their perceived role in mitigating loneliness. It also investigates barriers and facilitators to technology use for promoting social connection. Guided by the Social Support Theory and Technology Acceptance Model 3 (TAM3), the study centers the perspectives of an underrepresented population.

Fifteen African American women aged 67–82 participated in semi-structured interviews between …

Methods And Applications For Bayesian Semiparametric Survival Analysis, Zile Zhao

Theses and Dissertations

Survival analysis is a cornerstone of biomedical and clinical research and plays an important role in fields as diverse as engineering, actuarial science, and sociology. In this dissertation, we develop new semiparametric Bayesian methodology for three problems from survival analysis: 1) adjustment for treatment crossover in randomized controlled trials (RCTs), 2) multilevel modeling of clustered survival outcomes when the cluster size is also informative, and 3) divide-and-conquer Bayesian inference for massive survival data. Our methods are semiparametric in the sense that we assume the covariates have a linear effect with regard to the log-hazard or the log- survival time; however, …

The Moderating Effects Of Religious Support And Family Support Between Racial Discrimination And Psychological Health Outcomes Among Black Adolescents, Tiera Cleveland

Theses and Dissertations

Racial discrimination is a common experience for Black adolescents. This study aimed to examine family support and religious support as a moderating variable between discrimination and mental health among Black adolescents. This study utilized data from an existing data set, the National Survey of American Life-Adolescent (NSAL-A). The NSAL-A included 1170 adolescents: 810 African American¹ and 360 Black Caribbean². The sample contained an equal amount of female (n = 608) and male (n = 562) Black adolescents³, who range in age from 13 to 17 years. Significant findings suggest that family support moderates the impact …

Quinone-Mediated Extracellular Electron Transfer In Escherichia Coli During Glucose Oxidation Metabolism, Megan Danielle Whisonant

Theses and Dissertations

The growing global demand for energy, ongoing reliance on fossil fuels, and increasing water pollution from industrial and anthropogenic sources present significant environmental challenges. In response to these issues, renewable and sustainable energy sources offer substantial potential for reducing dependence on fossil fuels and ensuring access to clean water. Microbial electrochemical systems (MESs) have emerged as promising, eco-friendly solutions for energy-efficient wastewater treatment and bioremediation. A key challenge in MESs development is facilitating effective electron transfer between microorganisms and electrode surfaces. The first chapter of this thesis discusses the fundamentals of MES types, explains mechanisms of extracellular electron transfer, and …

Action Research Integrating Heggerty’S Phonemic Awareness Instruction For Transfer Into Third-Grade Writing, Jennifer Elizabeth Jones

Theses and Dissertations

Writing requires the ability to encode phonemes to separate sounds to spell. Students who are mystified by print often find writing a laborious task. This action research investigated the impact of Heggerty's Bridge the Gap phonological instruction on third grade writing development, specifically focusing on elaboration. Recognizing that strong phonological foundations are crucial for both reading and writing success, this study addressed the gap in phonological instruction found in upper elementary grades. The research questions guided the research: What is the impact of phonological awareness instruction on third-grade students’ elaboration domain in writing? 2.) What are the third-grade students' perceptions …

The Potential Importance Of Microenvironment On Polymer Bound Chemical Reagents, Nathan Joseph Halsteter

Theses and Dissertations

In this thesis will provide a brief history of polymer bound reagents, their uses, and advancements. The importance of polymer microenvironments will be explored using a model kinetic resolution reaction utilizing polymer bound reagents to observe how changes in a polymer’s microenvironment effects the yield and selectivity of a reaction. It was found that there are copious factors that affect polymer bound reagents, and no direct conclusion could be drawn from the study.

Impact Of Participation In Extracurricular Activities On Female Students’ Motivation, Noha Ibrahim

Theses and Dissertations

This study investigated the impact of extracurricular activities (ECAs) on academic motivation among female high school students at a semi-governmental international school in the UAE. It addressed three research questions: (1) the effect of ECA participation on academic motivation, (2) students’ perceptions of how these activities influence their motivation, and (3) teachers’ perspectives on their impact. I conducted this action research in a school of 4,500 K-12 students predominantly local and from high-income backgrounds with an international teaching staff. Participants included grade 11 and 12 female students (ages 16–18) enrolled in one of four clubs (Reading, International, Sports, and Art) …

As Iron Sharpens Iron: Intentional Near-Peer Mentorship In The Collegiate Applied Studio, Morgan Smith Owen

Theses and Dissertations

Undergraduate students struggle to adjust to the expectations of university music programs. Mentoring programs are consistently cited as tools to build social capital and academic success, but there are few documented studies of mentoring applied directly to the traditional model of conservatory music instruction. Effective near-peer mentoring can build musicianship skills and develop accountability, establishing stronger practice routines and easing the transition to collegiate music study for younger students. This case study examines three models of mentorship to identify ways to create an intentional mentorship program within the applied studio, regardless of scale or specific form of instruction.

Characteristics Of Individuals Who Desired A Mentor But Did Not Have One: A Nationally Representative Study, Kenzie Delposen

Theses and Dissertations

Youth are experiencing increased mental health challenges due to the parallel increase in loneliness and social isolation. Mentorship has emerged as a potential solution to reduce social isolation and provide support, guidance, and encouragement to young people. The context of the mentoring relationship positively impacts adolescent lives by promoting a safe, stable, nurturing relationship (SSNR) to reinforce the intrinsic motivation to connect with others. However, many young people lack these relationships despite indicating that there were times when they wanted one (Garringer & Banning, 2023). Access to mentorship is influenced by factors such as racial or ethnic background, socioeconomic status …

Transgressive Desire And Women’S Liberation In The British Strike Bildungsroman, Carl Clinton Sweat

Theses and Dissertations

This dissertation examines the intersection of gender and class identity in British proletarian Bildungsromane set during the General Strike of 1926 and the Miners’ Strike of 1984/5, referred to collectively as “Strike Bildungsromane.” These prolonged industrial conflicts temporarily disrupted the gender division of labor that had hitherto been a defining aspect of pit village life. This development encouraged proletarian writers of the interwar and post-war periods to consider coalfield women as political agents, capable of subverting their preordained roles within the private sphere. These moments of subtle subversion are critical to the General Strike novels explored in this study, …

An Investigation Of The Impact Of Child-Centered Play Therapy Facilitated Through A Virtual Playroom On Disruptive Behaviors: A Single-Case Research Design, Keeland Kelley Lodato

Theses and Dissertations

This multi-manuscript dissertation comprises two interconnected articles that collectively explore facilitating Child-centered play therapy (CCPT) through telemental health (TMH) using a virtual playroom. Chapter Three includes a qualitative manuscript using thematic analysis to understand the experiences of eight counseling students who participated in a training where they learned how to create and utilize a virtual playroom, followed by a virtual play session with elementary-aged children. The results from this study provided six emergent themes and subthemes. Chapter Four includes a quantitative manuscript using a single-case research design. More specifically, this study used a reversal design to investigate the impact of …

Reactivity Of Redox-Active Carboranyl Diphosphines And Carboranyl Diphosphoniums: Metal-Free Pathways For Small Molecule Activations And Transformations, Amanda Lynn Humphries

Theses and Dissertations

Transition metal catalysis has been an integral part of synthetic chemistry for its ability to selectively activate strong substrate bonds, promoting numerous crucial transformations. Despite their utility, the precious metals that are often employed in these catalytic reactions suffer from several drawbacks (including high toxicity, low natural abundance, high costs, and low sustainability), increasing the motivation to design suitable metal-free alternatives. Towards this end, several ambiphilic main-group systems have been devised to show metal-like reactivity, such as carbenes, borylenes, and Frustrated Lewis Pairs. This manuscript will describe the ambiphilic reactivity of carborane-based phosphorus compounds, highlighting the unique metallomimetic reactivity that …

Characterizing Dissolved Organic Matter Composition In A Southeastern United States Watershed, Gwendolyn Marcelette Hopper

Theses and Dissertations

Dissolved organic matter (DOM) has important roles in many biogeochemical cycles. DOM is primarily composed of dissolved organic carbon (DOC), nitrogen, and phosphorus, and the processing of DOM is important for nutrient regulation and carbon cycling. In the coastal plains of the southeastern United States, there are many rivers and streams known as “blackwaters” with exceptionally high concentrations of chromophoric dissolved organic matter (CDOM) leached from terrestrial soils, coinciding with a region experiencing some of the nation’s highest rates of development. As changes in land use and climate continue to occur, DOM composition from natural to anthropogenically impacted systems can …

The Dialogic Self: Persius Satires 4 And Oikeiosis In Stoic Philosophy, William Michael Dodd

Theses and Dissertations

Though acknowledging that Persius alludes to Horace so frequently that he creates a dialogue with his elder, many commentators fail to see that Persius would challenge his predecessor. Especially evident in Satire 4, Persius' challenge to Horace stems from the younger poet's Stoicism, which philosophy he sees Horace as lampooning throughout the elder poet's Satires. Persius not only defends his Stoicism in Satires 4 but also engages with perceived weaknesses in the Epicureanism he finds in Horace. For instance, instead of the Epicurean version of natural law Persius finds in Horace, which conceives of human ties as contractual, the younger …

Determination Of Structure-Function Relationships In Hybrid Catalysts On Metal Oxide Supports, Joseph John Kuchta

Theses and Dissertations

Transition metal catalysis has revolutionized chemical synthesis, enabling efficient and selective transformations critical to the pharmaceutical, agricultural, and materials industries. However, traditional methods often rely on expensive, non-sustainable metals and harsh reaction conditions that generate significant waste. This dissertation explores a series of innovations aimed at bridging the gap between homogeneous and heterogeneous catalysis through the development of hybrid catalysts. These systems combine the molecular precision of homogeneous catalysts with the stability and practicality of heterogeneous supports, offering a pathway to more sustainable and scalable catalytic processes.

The first area of focus investigates nickel-based hybrid catalysts as a cost-effective and …

What We Don’T Know Can Hurt Them: An Examination Of Culture-Centered Pedagogy In A Diverse Elementary School, Kelly Dale Hogan

Theses and Dissertations

This qualitative action research study examined a growing cultural divide at an elementary school with a significant teacher diversity gap, best described as a discrepancy between the number of White educators compared to the number of students of color within an educational setting. Surveys were utilized to understand teachers’ cultural competency, and then all participants engaged in a book study intervention focused on culture-centered pedagogy. The study concluded with exit interviews between participants and the researcher to gauge how perceptions of working with diverse student populations progressed throughout the study. Survey responses, book study field notes, and interview transcripts were …

‘If You Design For The Future To Treat Of Witches:' Diabolic Service Magicians, Astrologers, And Witchcraft In John Dunton's Athenian Mercury, 1690-1697, Lauren Rebecca Rowe

Theses and Dissertations

Originating in the print stands of seventeenth-century London, the Athenian Mercury enjoyed a nearly miraculous seven-year run time as the most well-known and successful anonymous question and answer periodical of its time. Conceptualized and produced by bookseller John Dunton, the Mercury existed as an interface for intellectual discourse readily accessible to men and women. Kept entirely anonymous on the part of the author and reader, the intellectually curious could write questions to the Mercury and receive answers in turn on a vast variety of subjects twice a week. Aside from the more expected queries on science, love, mathematics, and religion, …

Irish Teachers’ Perceptions Of Immigrant Students: Exploring How Culturally Responsive Pedagogy Affects Biases, Metacognition, And Inclusive Teaching Practices, Dorothy Widener Alton

Theses and Dissertations

Abstract The purpose of this paper is to describe a qualitative, reflective action research study that examined if learning and reflecting on culturally responsive pedagogy (CRP) affected Irish post-primary teachers’ perceptions of immigrant students, metacognition of biases, teaching practices, and inclusivity of these marginalized students. Qualitative data consisted of administering an online survey to post-primary teachers across Ireland, chosen by convenience sampling. In addition, I conducted an in-depth reflective survey before, during, and after providing CRP literature to four select participants, selected by purposive and snowball sampling. Data was analyzed by coding and observing emerging patterns to identify overarching themes …

Investigating The Impact Of Cross-Loadings On Model Fit And Mediation Inferences In The Latent Mediator Model, Qiulin Lu

Theses and Dissertations

Cross-loadings are a common phenomenon in psychological research. Extant studies have focused primarily on measurement models, like confirmatory factor analysis (CFA), and have shown that omitted cross-loadings can bias the inter-factor correlation. These results suggest that omitted cross-loadings might likewise bias structural paths in other structural equation models (SEMs), but this area remains under-investigated. Such an effect could impact the evaluation of third variable effects, like mediation, when estimated in a SEM framework.

This study addresses this gap by examining the effects of cross-loadings in single, latent mediator model in a simulation study. The performances of conventional SEM and Bayesian …

Moderation Amid Resistance: African American Advocacy, Educational Equity, And School Desegregation In Botetourt County, Virginia, Katherine Blanton

Theses and Dissertations

This dissertation examines the historical and social dynamics surrounding African American education in Botetourt County, Virginia preceding, during, and following court ordered desegregation. Using historiography, the researcher incorporated archival resources, interviews, and oral histories to examine the African American leadership of the County Wide League and their steadfast commitment to provide equal educational opportunities for African American children in Botetourt County. Set against the history of southern segregation, white school boards, and massive resistance to the 1954 U.S. Supreme Court decision to desegregate in Brown v. Board of Education, the historiography represents the moderate stance of the County in …

A Study Of Ci3t Implementation: Middle School Ela Teachers' Perceptions Of Tier 1 Academic Practices On Student Performance, Martha Kathryn Jenkinson

Theses and Dissertations

The purpose of this mixed methods action research study was to understand teachers’ perceptions of Ci3T tier 1 academic practices following the first year of implementation. Tier 1 instruction, delivered primarily by classroom teachers, is meant to meet the needs of a majority of students. Understanding teachers’ perceptions of program implementation, as well as reviewing student data to seek impacts of Ci3T on student learning, are important considerations when deciding how to improve the system. This study focused on the experiences and perceptions of English Language Arts teachers and Special Education teachers who work in ELA classes.

Data were gathered …

Utilizing Culturally Responsive Teaching Practices In The Classroom, Lindsey Nicole Finley

Theses and Dissertations

This research study aimed to address the impact of teaching concepts of culturally responsive pedagogy on teachers’ understanding of their implicit biases. Additionally, it examined the impact that professional development training utilizing culturally responsive teaching (CRT) methods have on teachers working with multilingual learners (MLs). The research questions were: (1) What is the impact of teaching concepts of culturally responsive pedagogy on teachers' understanding of their implicit biases? and (2) What is the impact of intentional, ongoing professional development utilizing CRT methods for teachers working with multilingual learners? This study used a theoretical framework of culture centered pedagogies such as …

Latinx Parent Acculturation And Acculturative Stress: Impact On Family Functioning And Youth Well-Being, Julie Nguyen

Theses and Dissertations

Research has demonstrated that acculturation and acculturative stress can influence family dynamics and Latinx youth well-being. Guided by the Family Stress Model, the current study aimed to assess a latent measurement model of acculturation and examine the relationship between acculturation and acculturative stress and how acculturative stress is related to family processes and youth adjustment. Data included 898 youth and 630 parents from the SOL Youth study. Structural equation modeling was used to assess a latent two-factor measurement model of acculturation and its relation to parental acculturative stress as well as how parental acculturative stress is related to family functioning …

Exploring The Sense Of Community And Perceived Professional Learning Of Multigrade Teachers In Cohort-Based Online Community Of Practice Sessions: An Action Research, Paola Franco-Oudri

Theses and Dissertations

The purpose of this action research was to explore the influence of cohort-based, online Community of Practice sessions on the sense of community and perceived professional learning of multigrade teachers in a faith-based, private school system in North America. Approximately 25% of teachers in the Seventh-day Adventist school system are multigrade elementary teachers and teach three or more grade levels in the same classroom. Multigrade teachers often have limited access to traditional professional development (PD) options because of distance, cost, and staffing limitations, but furthermore, traditional PD programs do not address the needs and realities of small, multigrade schools. Additionally, …

Hardware Accelerated Simulation Of Buck Converters Using Physics-Informed Neural Networks, James Clayton Crews

Theses and Dissertations

Physics-informed neural networks (PINNs) are an emerging machine learning method for learning the behavior of physical systems described by governing differential equations. Dc-dc power-electronic converters are used in a variety of industry applications such as motor drives or power supplies where real-time simulation is critical for control and safety. This thesis investigates physics-informed machine learning as an approach to develop a real-time digital twin for dc-dc power converters. Traditional numerical integration methods are used to approximate discretized behavior, and the results are compared with a trained PINN model. Modern ML frameworks (such as PyTorch and TensorFlow/Keras) are used to quickly …