Digital Commons Network^™

Saltfish And Seedcake: Examining Fantasy Through Food Studies, Isabella Martins-Simonsen

Electronic Theses and Dissertations

Although mundane and often overlooked in reality, in fantasy, food, like all other things, is entirely symbolic. Therefore, considering food closely when analyzing a fantasy text offers unique insights into the world being developed, the characters within that world, and the author’s own understanding of both the real and “secondary” world. In this paper, I consider the foods of Earthsea, Narnia, and Middle Earth to offer various perspectives on the worldbuilding and examine the implications of different foods in these well-known settings. For example, the tea served in Narnia creates a fantasy world that is more normal than the strange …

Predictive Analytics In Oncology And Ophthalmology: Machine Learning Applications For Diabetic Retinopathy And Breast Cancer, Ali Abidalkareem

Electronic Theses and Dissertations

The convergence of artificial intelligence and healthcare represents one of the most transformative developments in modern medicine, with deep learning technologies emerging as powerful tools for addressing complex diagnostic challenges. This dissertation develops and validates machine learning frameworks that address critical challenges in medical diagnosis through innovative approaches to data augmentation, feature learning, and classification, focusing on two fundamental problems: Diabetic Retinopathy (DR) severity classification using multi-model convolutional neural networks (CNNs), and breast cancer stage identification using microRNA (miRNA) gene expression biomarkers. For diabetic retinopathy classification, this work proposes an ensemble deep learning framework that integrates Diffusion-based data augmentation for …

Integrating Multi-Source Data With Machine Learning Techniques To Upscale Wetland Carbon Dioxide Fluxes, Abdullah Sulaiman Abdullah Al Fazari

Electronic Theses and Dissertations

Accurate quantification of atmospheric carbon dioxide (CO₂) fluxes in wetland ecosystems is essential for understanding their role in both regional and global carbon dynamics, particularly in the context of climate change. However, the spatial and temporal heterogeneity of wetlands presents major challenges for developing reliable upscaling models. This research developed and validated a comprehensive framework to upscale CO₂ fluxes across the Everglades National Park (ENP) and Big Cypress National Preserve (BCNP) in South Florida through the integration of multi-source datasets, including AmeriFlux eddy covariance (EC) tower measurements, NASA’s BlueFlux airborne CO₂ data, and multispectral satellite imagery from Landsat 8 OLI …

Trading Precarities: How Bangladeshi Freelancers Leverage The Digital Economy Amid Local Insecurity And Ai Disruption, Naim Bin Hasan

Electronic Theses and Dissertations

This study examines how Bangladeshi freelancers use digital platform work to cope with precarious local labor markets and how this strategy both mitigates and reproduces insecurity. In this form of work, freelancers compete for short-term, skill-based remote jobs posted by global clients. Drawing on 30 in-depth interviews and virtual ethnography, this study challenges dominant Western understandings of the precariat that assume workers fall from stable employment into insecure work. Instead, the findings show that many freelancers enter platform labor strategically as a way out of already unstable and limited local opportunities. While freelancing carries a promise of foreign income, flexibility, …

Three-Dimensional Imaging Of Neuronal Activation Patterns In Chronic Neuropathic Pain And Opioid Pharmacology, Madeline Martinez

Electronic Theses and Dissertations

Chronic neuropathic pain severely diminishes quality of life, yet the supraspinal neural circuits that sustain pain perception and mediate analgesic relief remain incompletely characterized. While peripheral and spinal pain pathways are well established, relatively few studies have mapped pain- or opioid-related neuronal activation across the entire brain. This dissertation employed activity-dependent genetic labeling (TRAP2/Ai9), whole-brain tissue clearing, light sheet microscopy, and graph-theoretic network analysis to characterize brain-wide activation patterns across chronic pain and analgesic conditions in mice.

In Chapter 1, we mapped supraspinal neuronal activation in a bilateral spared nerve injury model of chronic neuropathic pain. Although no individual region …

Evaluating The Geographic Patterns In Isotopic Composition For Nesting Hawksbill Sea Turtles In The Wider Caribbean By Coupling Satellite Telemetry And Stable Isotopes, Anna Kreiger

Electronic Theses and Dissertations

Combining satellite telemetry and stable isotope analysis offers a framework for inferring sea turtle foraging habitats when spatial isotopic gradients exist. We evaluated this combined approach using carbon (δ13C) and nitrogen (δ1⁵N) isotope values from critically endangered hawksbill turtles (Eretmochelys imbricata) nesting at Buck Island Reef National Monument, U.S. Virgin Islands (N=31), and Long Island (Jumby Bay), Antigua (N = 31). Nesting females were satellite-tracked to identify foraging areas and sampled for skin tissue, and Empirical Bayesian Kriging was used to generate basin-scale δ13C and δ1⁵N isoscapes. Tracked turtles foraged widely across the Caribbean Basin, including the Greater …

Testing Effects Of Acoustic Propagation, Morphology, And Intrasexual Selection On The Elaboration And Performance Of Song In Bachman’S Sparrows (Peucaea Aestivalis), Hans Kayser Gonzembach

Electronic Theses and Dissertations

Birdsong is a communication signal shaped by ecological, morphological, and cultural processes. While many songbird species produce relatively simple vocal repertoires, others, such as the Bachman’s Sparrow (Peucaea aestivalis), produce moderately large repertoires with multiple distinct and context-dependent song categories. Despite this complexity, little is known about the major drivers that shape song elaboration in this species. Additionally, it is unclear whether abiotic factors play a significant role in determining how different song types are learned and shared within a population. To better understand how ecological and social pressures shape song variation, I conducted three studies using Bachman’s …

Narrative Strategies In Presidential Environmental Policymaking: An Examination Of The Executive Impacts Of Presidential Narratives, Gorgin Mansourian

Electronic Theses and Dissertations

In this dissertation, I examine how U.S. presidents employ narrative strategies to shape environmental policymaking through both rhetorical and institutional mechanisms. Specifically, I investigate how Presidents Donald J. Trump and Joseph R. Biden constructed, communicated, and institutionalized environmental narratives during their first terms, highlighting the relationship between presidential narratives and executive orders. Using the Narrative Policy Framework (NPF) and Richard Neustadt’s Presidential Power Theory (PPT), this study conceptualizes presidential narratives as both rhetorical tools and instruments of persuasion within institutional contexts. This synthesis advances the NPF by highlighting the role of institutional positions on narrative credibility, by emphasizing the roles …

Development And Application Of A Multiplex Bead-Based Platform For Quantifying Host-Pathogen Protein-Protein Interactions, Larah Gorayeb

Electronic Theses and Dissertations

Host-pathogen protein-protein interactions are the key drivers of infectious diseases, where events such as pathogen adhesion and signaling are directly associated with disease severity. One example of this is Malaria, in which the Plasmodium falciparum infected erythrocytes adhere to endothelial receptors to avoid splenic clearance. This study investigated interactions between PfEMP1 CIDR1 field domains and host receptor CD36 using a multiplex platform to quantitatively determine binding affinities. Variants RP18 and RP27 exhibited strong affinity, suggesting a role in cytoadherence and disease severity. To evaluate broader applicability, the platform was expanded to the interaction between host protein SIVA1 and Helicobacter pylori …

Does Volume Cycling Elicit A Skeletal Muscle Hypertrophy Re-Sensitization Effect? A Comparison Of Constant Versus Cycled Resistance Training Protocols, Joshua C. Pelland

Electronic Theses and Dissertations

Purpose: This study examined whether volume cycling in resistance training can elicit a skeletal muscle hypertrophy re-sensitization effect without muscle atrophy. We hypothesized that muscle size would be maintained during lower volume phases, that re-sensitization would occur following these phases, and that overall hypertrophy would be similar between cycled and constant volume conditions.

Methods: Thirty-seven trained men and women had their lower limbs randomized to either a constant volume (12 sets/week throughout) or cycled volume (alternating 4-week phases of 12 and 4 sets/week) condition for unilateral calf press training over 20 weeks. Lateral and medial gastrocnemius muscle thickness (MT), calf …

Street-Level Bureaucrats In Public Higher Education: The Ethical Obligations To Support Psychologically At-Risk Students, Michael Turtz

Electronic Theses and Dissertations

To fill the gap in the current literature, the purpose of this dissertation was to explain how and why Street-Level Bureaucrats (SLBs) in public higher education helped psychologically at-risk students during the pandemic. This qualitative study was intended to examine the role of SLBs in public higher education as it relates to their utilization of administrative discretion when advising psychologically at-risk students. In addition to administrative discretion, this dissertation also explored the role of ethical obligations and the use of a therapeutic lens when SLBs are faced with some of the most difficult situations for which they were not equipped …

Synthesis And Evaluation Of Novel Mt5-Mmp Inhibitors For Treatment Of Alzheimer’S Disease, Nicholas Borges

Electronic Theses and Dissertations

Alzheimer’s Disease (AD) is a common neurodegenerative disease that is characterized by the accumulation of amyloid beta (Aβ) plaques and presence of neurofibrillary tangles (NFT) in the brain. Aβ oligomers are directly toxic to CNS synapses and can induce tau protein hyperphosphorylation, that causes NFT buildup. For these reasons, Aβ has been investigated as a therapeutic target, yet very few clinical trials have yielded effective drugs for AD treatment until now. Recently, the MT5-MMPmediated η-secretase pathway, which generates synaptotoxic Aη from amyloid precursor protein, has been reported (Wang et al 2024, Wilem et al 2015). Thus, pharmacologic inhibition of MT5-MMP …

Development, Validation, And Comparative Evaluation Of A Rheotaxis-Based Microfluidic Device To Isolate A Subpopulation Of High-Performance Human Spermatozoa, Charlene S. Fournier

Electronic Theses and Dissertations

Fertility has declined over the past decades, and male infertility is now recognized as contributing equally to the need for Assisted Reproductive Technologies (ART). Current clinical sperm processing methods rely on multiple centrifugation steps, which are time- and labor-intensive and may be detrimental to spermatozoa. Therefore, improved methodologies are needed to select functional, healthy spermatozoa while mimicking natural sperm selection. Microfluidics has expanded in reproductive biology and offers an efficient approach to selecting spermatozoa based on progressive motility and rheotaxis—their natural ability to swim against a constant flow. In this study, I developed a rheotaxis-based microfluidic device to isolate highly …

Characterizing The Diet, Movement, And Hooking Frequency Of Pier-Hooked Juvenile Green Turtles (Chelonia Mydas), Cody R. Mott

Electronic Theses and Dissertations

Green sea turtles are impacted by their interactions with recreational fishing piers, but how these interactions affect their diet, behavior, and hooking risk remains poorly understood. The objective of this study was to characterize and quantify interactions between juvenile green turtles (Chelonia mydas) and a recreational fishing pier in southeast Florida. The goals were to evaluate how proximity to the pier influences turtle diet, behavior, and incidental hooking. We compared pier-hooked turtles with individuals captured on an adjacent reef and at a control site lacking a nearby pier. Dietary preferences were assessed using nitrogenous blood analytes and stable isotope analysis. …

Family Support And Counseling: Predicting Family Relationship Quality And Self-Management In Women With Epilepsy, Tiffany A. Winch

Electronic Theses and Dissertations

Epilepsy, a neurological disorder characterized by recurrent seizures, can impede many aspects of daily life for individuals diagnosed with it (Beghi, 2020; Kanner & Bicchi, 2022). The problem is that women with epilepsy may struggle with family relationships and epilepsy self-management, and it is not known to what extent family support and epilepsy counseling ameliorate this detriment. The purpose of this quantitative correlational study was to examine the extent to which family support and epilepsy counseling predict family relationship quality and epilepsy self-management among women who suffer from the condition. Surveys measuring the variables family support, epilepsy counseling experience, family …

Retreat, Renew, Reflect: Exploring Digital Marketing Strategies For Faith-Based Retreat Centers, Rebecca A. Mickler

Electronic Theses and Dissertations

In today’s fast-paced world, retreat centers offer a vital opportunity for rest, reflection, and spiritual renewal. Despite growing societal awareness of mental health and wellness, many religiously affiliated retreat centers face stagnant participation, aging leadership, and operational challenges that threaten their long-term sustainability. This qualitative-dominant mixed methods study uses bright spots analysis to examine how Villa Maria Education and Spirituality Center (VMESC), a Catholic retreat center, can strengthen its digital marketing strategies to attract new audiences while maintaining mission alignment.

Bright spots analysis examines positive outliers, organizations that achieve notable success despite operating within similar constraints, to identify practices that …

The Perceived Barriers Of A One-To-One Technology Implementation: A Post-Covid Case Study, Adam Howard Creasy

Electronic Theses and Dissertations

This qualitative dominant, exploratory sequential case study aimed to identify stakeholder perceptions of technology within a one-to-one technology initiative and outline any possible barriers. The study examined the perceptions of teachers, parents, and administrators within a rural K-12 public school district in Pennsylvania. The study provided school district stakeholders with data they can use to improve existing and future initiatives by early intervention within areas of concern identified by the study. Data were collected using a two round approach which includes focus groups and targeted surveys utilizing research-backed electronic survey tools. The research questions addressed in the study were the …

Identifying The Barriers Bilingual Parents Face In The Special Education Process, Miranda Leah Hernandez

Electronic Theses and Dissertations

Increasing parental involvement in the special education process means parents, teachers, and school administrators can unite to educate the children. The problem that the researcher identified was that emergent bilingual families struggle to become meaningful participants in their children’s individualized education plans. This was a qualitative case study that identified the barriers that bilingual parents face within the special education process and the recommendations from bilingual parents on how to help them become more meaningful members of their child’s individualized education plan. The population within the research included bilingual families with children in the greater Houston, Texas area who have …

The Impact Of Social Determinants Of Health On The Emotional Well-Being Of Lgbtq Young Adults, Bridget J. Mantooth-Urso

Electronic Theses and Dissertations

The current study examined whether neighborhood-based social determinants of health (SDOH) were associated with emotional health outcomes among sexual minority young adults ages 18–29, and whether perceived social support mediated this relationship. SDOH refers to the conditions in which individuals are born, grow, live, work, and age, including neighborhood and built environment characteristics that shape access to resources, safety, and well-being. Emotional health in this study was operationalized through self-reported symptoms of depression and anxiety, while social support represented perceived availability and quality of interpersonal resources that may buffer the impact of structural disadvantage. This study utilized a non-experimental, cross-sectional …

The Implications Of The Midyear Departure Of Residence Directors In Housing And Residential Life, Chelsea Titus

Electronic Theses and Dissertations

High attrition rates among entry-level student affairs professionals have been documented for decades, yet little research has examined the implications of midyear departures within housing and residential life. Residence directors serve as live-in professionals responsible for crisis response, student conduct, staff supervision, and community development. When a midyear departure occurs, the disruption extends beyond the vacancy and affects supervisors, colleagues, and residential communities. The problem addressed in this study was the organizational and supervisory impact of midyear residence director departures. The purpose of this qualitative narrative inquiry was to examine the factors contributing to midyear departures and to explore how …

Reducing Humpty Dumpty Syndrome In Pediatric Inpatients, Jeanene Burns

Electronic Theses and Dissertations

The Doctor of Nursing Practice project examined pediatric inpatient falls. The healthcare agency involved in the project identified concerns regarding pediatric inpatient falls. Data were collected on pediatric inpatient falls that occurred on two nursing units at this agency based on the Generalized Risk Assessment for Pediatric Inpatient Falls and the Humpty Dumpty Falls Prevention Scale. Results from the project indicated marginal statistical significance, with approximately a 60% reduction in falls after the implementation of the Humpty Dumpty Falls Prevention Scale. A recommendation for future research is a comparison of the two pediatric fall risk assessment tools after the Humpty …

Exploring The Way Up: Career Paths, Challenges, And Resilience Among Women Leaders In Higher Education, Angela M. Brown

Electronic Theses and Dissertations

Women represent the majority of students and faculty in higher education students in higher education in the United States, yet they remain underrepresented in executive leadership positions. Women pursuing these roles encounter unique challenges, and institutions have increasingly recognized the value of mentoring and sponsoring women who aspire to leadership. Guided by Kumar’s CR8 resilience theory, this qualitative descriptive study explored how women leaders in higher education in the United States describe their career pathways to leadership, the challenges they encounter, and the impact of mentoring/sponsoring in developing their resilience for career progression. Semistructured interviews were conducted with 11 women …

Bridging The Divide: Exploring Stigma And Enhancing Belonging For Online Faculty In Higher Education, Stephanie L. Wanamaker

Electronic Theses and Dissertations

Online faculty in higher education experience stigma and negative perceptions regarding online education in academia. Despite the rapid growth and success of online education, negative perceptions and stigma have not evolved at the same pace as the success of online institutions. Many online faculty members frequently experience skepticism, criticism, and marginalization from their residential counterparts within their academic communities. As a result of these experiences, online faculty are experiencing a reduced level of belonging, contributing to increased levels of burnout, poor satisfaction, and struggles with professional identity. Despite these experiences, little is known about the problem or how online faculty …

How Can Learning Management Systems Positively Impact Student Engagement In Online Courses?, Jerald P. Wilson

Electronic Theses and Dissertations

The topic of this dissertation is learning management systems, specifically Canvas. Research has proven that student engagement is a strong factor in student achievement in both online and inperson courses. The COVID-19 pandemic highlighted a deficit in instructors’ ability to acquire and maintain student engagement in online courses. This study details why this problem exists and how instructors have successfully addressed it in higher-level online courses. The primary purpose of this qualitative descriptive study was to examine how learning management systems, specifically Canvas, can increase student engagement in online courses in higher education. Qualitative research was the chosen paradigm for …

African American Male Dual Enrollment Graduates Perceptions Of The Transition To The 4-Year University, Kendra L. Harrison

Electronic Theses and Dissertations

The purpose of this qualitative exploratory case study was to explore how African American men who earned an associate degree from dual enrollment programs in Texas perceive the transition to a 4-year university to pursue a bachelor’s degree. The 4S model of Schlossberg’s transition theory was the conceptual framework that undergirded the study. Purposive sampling was used to recruit 20 participants. The researcher collected and triangulated data using a questionnaire and semistructured interviews and analyzed it using six-step thematic analysis. Results revealed competence and confidence from dual enrollment program resulted in a smooth transition to college, participants’ African American male …

Staying Power: A Case Study Of Teacher Retention In A Rural District, Amanda F. Mclellan, Amanda F. Mclellan

Electronic Theses and Dissertations

Teacher attrition continues to be a significant challenge in K-12 education, particularly in rural school districts where limited resources and geographic isolation can intensify staffing instability. While much research has focused on teacher attrition, little research examines why tenured teachers choose to remain in rural districts. The purpose of this qualitative, single-case study was to examine the experiences and insights of tenured teachers regarding their decision to continue teaching in a small, rural Texas school district. Guided by Mason and Matas’s fourcapital framework for teacher retention, this study examined how human, social, structural, and positive psychological capital influenced teachers’ decisions …

Implementing Hypertension Guidelines Into Clinical Practice, Misti Michele Mays

Electronic Theses and Dissertations

Hypertension is a complex chronic disease process, and it is essential to educate the patient on the disease process, as well as on all aspects of self-management. It is essential that providers choose an evidence-based guideline by which they will manage their hypertensive patients. In addition, providers must schedule regular follow-up appointments with their patients, along with a wide variety of other multifactorial components in regard to the management of patients diagnosed with hypertension. In addition, providers have a responsibility to stay informed on new approaches to blood pressure management by reviewing the professional literature on a regular basis. Much …

Leading The Charge: A Qualitative Descriptive Study Exploring How Public Middle School Principals Perceive And Enact Their Role As Advocates For School-Based Mental Health, Tanya Irby Tucker

Electronic Theses and Dissertations

Adolescent mental health concerns have increased significantly during the middle school years, requiring school leaders to expand their role in supporting students’ social, emotional, and psychological well-being. Although schools are uniquely positioned to deliver comprehensive mental health services, how public middle school principals perceive and enact their role as advocates for school-based mental health services remains underexplored. The purpose of this qualitative descriptive study was to explore how public middle school principals perceive and enact their role as advocates for school-based mental health services. Guided by social cognitive theory (SCT), this study examined how personal beliefs, behavioral practices, and environmental …

Influence Of Restorative Justice Practices On Student Behavior, Shawn N. Clemons

Electronic Theses and Dissertations

The purpose of this qualitative exploratory case study was to explore how teachers in culturally diverse suburban U.S. elementary schools perceive the implementation of restorative justice practices as an influence on student behavior. The researcher collected data through questionnaires and semistructured interviews of 14 elementary teachers currently employed in a suburban elementary school who actively use restorative justice with students. Findings from the study indicated the restorative justice practices contribute positively to school culture by prioritizing relationship building, structured conflict resolution, and inclusive practices. The findings from this study can be used with teachers, administrators, district support, and school board …

Addressing The Problems Of Data Variations, Quality, And Scarcity In Training Deep Neural Networks, Jian Sun

Electronic Theses and Dissertations

The performance of deep neural networks (DNNs) is strongly influenced by the characteristics and quality of the underlying datasets. This Ph.D. dissertation addresses three pervasive data challenges-imbalance, quality degradation, and scarcity-that commonly hinder the effectiveness of DNNs in computer vision (CV) and natural language processing (NLP) applications.

Class imbalance remains one of the most frequent causes of degraded model generalization. While Focal Loss effectively mitigates inter-class imbalance by assigning higher weights to minority classes, it struggles with intra-class imbalance, particularly in video datasets where longer clips dominate feature representation. To address this, I implement and utilize …