Digital Commons Network^™

Synthesis Of Iso-Dityrosine, A Potential Biomarker Of Neurodegenerative Diseases, Brandon R. Knouse

Theses and Dissertations

As the population of the United States continues to age, the prevalence of neurodegenerative disorders is rising, increasing the societal and clinical burden of diseases such as Parkinson’s disease and dementia-related conditions. Lewy Body Dementia (LBD), the second most common cause of dementia, shares underlying neuropathological features with Parkinson’s disease, including the aggregation of misfolded α-synuclein into Lewy bodies and Lewy neurites. Current diagnostic approaches rely heavily on cerebrospinal fluid biomarker analysis; however, significant overlap exists among biomarkers associated with Alzheimer’s disease and other neurodegenerative conditions, limiting diagnostic specificity. Emerging evidence suggests that oxidative modifications of α-synuclein, particularly the formation …

Nanomagnet Based Reservoir Computing And Quantum Control, Fahim F. Chowdhury

Theses and Dissertations

Conventional CMOS scaling has driven remarkable advances in computing but faces increasing physical and energy constraints, motivating alternative computing paradigms that integrate memory and computation while improving energy efficiency. Nanoscale magnetic systems offer a promising platform for such approaches because their intrinsic nonlinear dynamics and localized magnetic fields can support both classical and quantum information processing. This thesis investigates nanomagnetic systems for physical reservoir computing and, with primary emphasis, for localized quantum control of spin qubits.

The first part explores dipole-coupled nanomagnet arrays as physical reservoirs. Micromagnetic simulations demonstrate nonlinear dynamical behavior with high short-term memory and parity-check capacity, enabling …

Managing Identity, Claiming Expertise, And Emotional Labor: A Constructivist Grounded Theory Of The Experience Of People With Serious Mental Illnesses In Primary Care, Jeffrey Ciak

Theses and Dissertations

People with serious mental illnesses (SMI) die 15 to 20 years before their peers without mental illness primarily due to chronic physical health conditions. Preventative care and treatment for chronic physical health conditions primarily occurs through primary care, but the experience of people with SMI in primary care is understudied. This constructivist grounded theory dissertation explored the experiences of people with SMI in primary care. Theoretical sampling resulted in 19 participants who were adults with SMI and long-term anti-psychotic use. Data was collected through one-to-two-hour long intensive interviews. The analytical process occurred concurrently with data collection. The abductive analytical process …

Modeling Of Laser-Produced Plasma Plumes: Expansion, Chemistry, And Thin-Film Deposition, Edmund Tsiri Semaha, Edmund Tsiri Semaha

Theses and Dissertations

Abstract

Laser-assisted material processing involves coupled plasma expansion, chemical reactions, and particle transport that govern the quality of thin-film deposition. This dissertation presents a comprehensive computational investigation of these processes using the OpenFOAM framework. First, the performance of the twoPhaseEulerFoam (tPEF), rhoCentralFoam (rCF), and sonicFoam (sF) solvers is evaluated for modeling laser-produced plasma plume expansion under atmospheric conditions, demonstrating that tPEF accurately captures shock-wave propagation, hydrodynamic behavior, and multispecies interactions. Building on this validation, the reactingFoam (rF) solver is employed to investigate the chemistry of aluminum plasma expanding into an air environment (Al–N₂–O₂). The model incorporates appropriate thermodynamic, transport, and …

The Influence Of Metacognition On College Readiness And Persistence, Michael L. Fitzgerald

Theses and Dissertations

This applied dissertation examined the influence that metacognition has on college readiness and its most traditionally used metrics: performance-based outcomes and persistence. Specifically, this study addressed to what degree underlying metacognitive structures differ between college students’ successful metrics of performance and persistence compared to a more general sample of college students.

The research characterized metacognition along three domains of analysis: (a) selfefficacy/ motivation, (b) soft skills/psychological capital (Psycap), and (c) expected value of control (EVC). The quantitative study included 54 college students and a crosssectional design. Participants completed a four-part Likert-style survey, where their responses were measured along the three …

The Implementation Of Small Group Direct Instruction For Reading Domains Of Second- Grade Students, Tarmeka Smith-Bennett

Theses and Dissertations

This applied dissertation explored how implementing small-group direct instruction in an elementary school setting affected the reading performance of second-grade students. The study examined how organized small-group direct instruction can elevate students’ reading achievement in phonics, vocabulary, and reading comprehension. Over a six week instructional period, a mixed-methods research design was used to collect quantitative and qualitative data.

Pretest and posttest students’ reading assessments were collected using quantitative data, while teachers' weekly reflections and surveys were collected using qualitative data. A total of 30 students identified as struggling readers, and three second-grade teachers who implemented small-group direct instruction participated in …

Student Centered Approaches To Analyzing Engagement And Discourse, Kamil Hankour

Theses and Dissertations

Student engagement and participation in classroom discourse are widely recognized as powerful predictors of meaningful science learning, yet students’ own perspectives on the factors that shape their engagement and participation are currently underexamined. Prior research has established strong links between engagement, discourse and outcomes such as academic achievement (Bae & DeBusk-Lane, 2019; Fredricks et al., 2004; Sedova et al., 2019), but less is known about how students understand and interpret their experiences across individual, group-level and classroom contexts, particularly within historically marginalized populations (Cook-Sather, 2013; Schaefer et al., 2024). This three paper dissertation advances a line of inquiry integrating a …

Tangled Up In Blues, Clara B. Deweese

Theses and Dissertations

Martin Buber’s philosophy teaches us that when our masks fall and our armor’s unveiled, we discover humanity shared. Tangled Up in Blues unpacks the snapshot photographic practice I’ve had for years, which documents my mutually uplifting relationships, and is presented for my thesis exhibit through a painterly technique that deconstructs and reconstructs  the images onto wood panels using laser transfer. As we navigate a distracted and fragmented society made of greed and bigotry, cherishing the deep connections and shared memories brings us optimism.

Sensory Constellations, Madaline K. Gardner

Theses and Dissertations

This thesis situates neurodiversity within the field of fine arts by integrating disability studies, institutional critique, and material practices in painting and printmaking. Through visual analysis and studio-based research, the project examines how tactile engagement, color relationships, and repetitive mark-making can articulate embodied experiences of neurodivergence. It challenges dominant institutional frameworks that pathologize neurodivergent behaviors by reframing stimming as a generative and communicative practice. The resulting body of work includes both image-making and the creation of tactile objects designed to facilitate sensory interaction. The thesis proposes alternative ways of understanding artistic practice and accessibility within art institutions.

Comorbid Psychosis In The General Population, Mariam Sankoh

Theses and Dissertations

Psychosis is a complex psychiatric phenotype characterized by substantial heterogeneity in symptom presentation, psychosis diagnosis, comorbidity patterns, and genetic architecture across diverse populations in the general population. Despite advances in psychiatric epidemiology and genomics, important gaps remain in understanding how psychosis symptoms and psychosis-related diagnoses manifest across racial and ethnic groups and how evolutionary genomic factors may contribute to disease risk and cross-ancestry genetic prediction. This dissertation, Characterizing Comorbidity in Psychosis in the General Population, integrates epidemiological, psychometric, and evolutionary genetic approaches to examine psychosis across diverse populations.

Aim 1 examined racial and ethnic differences in psychosis comorbidity patterns …

From Cultural Binaries To Coexistence: A Graphic Autoethnography Of Individualism And Collectivism In An International Context, Shahad Alsubaie

Theses and Dissertations

This arts-based autoethnographic study investigates individualism and collectivism, specifically through my study-abroad experience traveling from Saudi Arabia to the United States. Through arts-based reflective practice, I depicted the diasporic experience of being ontoepistemologically collectivistic while navigating a primarily individualistic society. I use the medium of a graphic memoir to illustrate and develop frameworks of confluence that embrace the two distinct cultural orientations simultaneously. This arts-based self-study not only contributes to the body of transnational scholarship but also serves as a reference for international students, researchers, and educators to use arts-based subgenres and data analysis methods to gain better insights into …

24-H Circadian Rest-Activity Rhythms And Physical Frailty In Older Adults: A Biopsychosocial Perspective On Sex Differences And Social Capital, Jisu Kim

Theses and Dissertations

Physical frailty is a prevalent geriatric syndrome characterized by age-related decline across multiple physiological systems. Physical frailty is associated with an elevated risk of adverse health outcomes, including chronic disease progression and all-cause mortality, representing a significant and growing public health concern. Disrupted circadian rest-activity rhythms (RARs) are increasingly recognized as clinically meaningful markers of physical frailty in older adults. However, the extent to which biological sex and social determinants of health (SDoH), particularly social capital, contribute to or modify the associations between RARs and physical frailty remains underexplored.

Therefore, this dissertation summarizes the existing literature on age-related changes in …

Comparison Of Artificial Intelligence Vs Human Observer For Periapical Radiolucency Detection, Adam J. Pink

Theses and Dissertations

Objective: The aim of this study was to assess the performance of an Artificial Intelligence (AI) program (OverJet AI) with that of experienced endodontic residents, endodontists, a radiologist, and dental students in detecting periapical radiolucencies using radiographic images.

Methods: One hundred and fifty periapical radiographic images were analyzed using the OverJet AI software to determine the presence/absence of a periapical radiolucency as well as the size (small 1-3mm, medium 4-6mm, and large 6+mm). The unaltered images were also evaluated by two endodontic residents, two practicing endodontists, an oral radiologist and two 4th year dental students.

Results: Agreement between the AI …

Sex In Plants: Birth, Death, And Trying To Survive In Changing Climates, Elena M. Meyer

Theses and Dissertations

Plant mating systems are key determinants of fitness. Angiosperms exhibit a wide variety of reproductive strategies, including self-fertilization (or selfing), outcrossing, and mixed mating. It has been estimated that up to 43% of plant species are capable of selfing, and selfing has been hypothesized to provide reproductive assurance where opportunities for mating may be limited, such as in marginal environments. However, questions regarding the overall distribution of selfing rates across angiosperms, the maintenance of mixed mating in the face of inbreeding depression, and the impact of self-fertilization on diversification rates remain incompletely resolved. Here, we explore the dynamics of self-fertilization …

Dodgeballs And Dragons: Gamified Live Theatre In The Service Of Community Betterment, Teddy Mcpherson

Theses and Dissertations

This thesis qualifies and documents a new genre of interdisciplinary, interactive theatre called Dodgeballs and Dragons. It covers a brief history of Dungeons and Dragons and Theatre of the Oppressed (the two foundational works for the new genre) as well as previous uses of D&D as a form of theatrical entertainment. After establishing the precedence used to create this product, the rest of the thesis breaks down how to write, lead, and play these shows on a regular basis. The document culminates in collected data providing concrete evidence for the future of the form and its many applications.

Why Educators In South Florida Are Leaving The Profession, Keyona Burnes

Theses and Dissertations

This applied dissertation was designed to provide better access to current information for the students and staff in a middle school. The printed materials located in the school’s media center were outdated, scarce, or inadequate. Electronic databases were available in the media center for online searching and information retrieval. However, the students did not know how to use databases as a source for completing class assignments or how to browse within these online services to find additional information. Teachers also did not know how to use electronic information to enrich their lessons.

The researcher developed lesson plans and strategies to …

A Case Study Of Employees’ Perception Of Leadership Styles In Law Firms, Naylet M. Sanchez

Theses and Dissertations

This applied dissertation explored employees' perceptions of their supervisors’ leadership styles and how those perceptions shape their job performance and satisfaction within a mid-sized personal injury law firm operating across multiple offices in the Southeastern United States. The effectiveness of leadership styles in law firms significantly influences employee performance, productivity, and organizational success, yet the unique contextual factors of legal practice environments have remained substantially underexplored in the leadership literature. Much of the existing research has focused on general organizational settings rather than the knowledge-intensive, hierarchical, and high-pressure dynamics that characterize law firms. This applied dissertation was designed to address …

The Effectiveness Of Behavioral Skills Training In Enhancing Teachers’ Ability To Write Specific, Measurable, And Individualized Iep Goals Targeting Quality-Of-Life Skills, Emilia Endean

Theses and Dissertations

This applied dissertation sought to assess the effectiveness of a behavior skills training (BST) protocol in improving teacher behaviors for writing high-quality individualized education plan (IEP) goals that target quality-of-life (QoL) domains. High-quality IEP goals that target both academic and functional repertoires are required by the Individuals with Disabilities Education Act (2004) and are essential for students with disabilities to achieve meaningful outcomes. BST is an effective intervention for teaching a variety of skills. No prior research has explicitly examined the application of BST for teacher professional development in writing IEP goals.

This single-subject study used a time-lagged multiple probe …

General And Special Education Teachers’ Collaboration And Co-Teaching Experience In Inclusive High School Classrooms, Pascale Atouriste

Theses and Dissertations

This qualitative descriptive study explored the collaboration and co-teaching experiences of general and special education high school teachers in inclusive high school classrooms in Florida. Guided by Pratt's achieving symbiosis theory, the study addressed three re-search questions concerning teachers' perceptions of (a) the benefits of co-teaching and collaboration, (b) the challenges they encounter, and (c) the strategies they find most helpful. Data were collected through semi-structured interviews with 10 general and special education teachers at a public high school in Florida and analyzed using Braun and Clarke's six-step reflexive thematic analysis procedure.

Six themes emerged from the data. For RQ1, …

Does Integrating Parental Involvement In Therapy Improve Behavior In Children With Attention Deficit Hyperactivity Disorder?, Pamela Lassiter

Theses and Dissertations

The research problem was the lower success rate of interventions for children with attention deficit hyperactivity disorder (ADHD) because of the exclusion of parents in the counseling process. The purpose of the research was to explore if integrating parent involvement in therapy improved the behaviors in children with ADHD. The study occurred at a private mental health facility that used cognitive behavior therapy and behavior interventions with the children.

The study was guided by the phenomenological qualitative research design. Ten single parents of male children, ages 4 to 10 with ADHD, participated in this study. Parents were selected using a …

Crisis In Care: A Qualitative Study To Understand The Factors That Influence High Turnover Among Florida’S Child Welfare Case Managers, Latasha R. Harris

Theses and Dissertations

This applied dissertation explores the factors influencing child welfare case manager turnover in Florida and how child welfare case managers are addressing those factors. National data has underscored the severity of this issue highlighting high turnover and low staff retention are attributed to work demand instability, chronic stressors and undermine the effectiveness of child welfare services.

This qualitative study investigates child welfare case managers’ perspectives on key influencing factors that determine child welfare case manager retention or influence their decision to leave. Guided by Motivation and Resiliency Theories, this qualitative descriptive study investigates child welfare case manager perspectives of why …

Generating Synthetic Ct From Mri Data, Foysal Ahmed

Theses and Dissertations

Magnetic resonance imaging (MRI) provides excellent soft tissue contrast without ionizing radiation, making it a strong alternative to computed tomography (CT) in medical imaging workflows. However, CT remains essential for applications requiring electron density information, such as radiation therapy treatment planning. This study investigated the feasibility of generating synthetic CT (sCT) images from MRI using a deep learning-based U-Net architecture. A two-dimensional U-Net was trained on paired MRI-CT data from the SynthRAD 2025 dataset, consisting of 120 T1-weighted (T1W) and 60 T2-weighted (T2W) axial cases, including deformed CT (dCT) aligned to MRI. Model testing used an independent dataset of 30 …

Walking And Wondering, Helen T. Tran

Theses and Dissertations

My thesis approaches walking as a form of inquiry and the Flood Wall as a site open to reinterpretation. I believe that the way we walk changes the way we observe and experience the world around us. This contrast between purposeful and leisurely walking reveals how time and intention shape our awareness of space. When walking is no longer dictated by urgency, it invites observations and questions. Slowing our pace allows curiosity to emerge, which aligns with my design ethos of asking questions as a foundation for understanding and creating meaningful experiences.

The Flood Wall’s emphasis on uninterrupted movement prioritizes …

Higher-Level Questioning In Elementary English Language Arts, Charity Zawatski

Theses and Dissertations

This exploratory case study addressed the difficulty with higher-level metacognition and questioning in a primary level elementary English Language Arts. This case study was determined as a need based on underperforming scores from the state assessment in ELA.

The research method look at the social phenomenon through inquiry around the rigor in higher-level questioning and the use of hand signals to support connections in learning. The researcher applied a semi-structured interview, an observation checklist, and a random sample of student artifacts as instruments for data collection. The researcher analyzed teachers’ lesson plans for a unit, observed a virtual classroom lesson …

Using Sports Performance Assessment Technologies To Help Narrow Achievement Gaps Of Black Male Adolescent With Other Racial Groups, Patavious R. Sorrell

Theses and Dissertations

This exploratory qualitative collective case study explored how sports performance assessment technologies (SPATs) may support the development of self‑regulatory and motivational processes associated with self‑efficacy among Black male adolescent student‑athletes. Guided by Social Cognitive Theory and the Technology Acceptance Model, the study examined the perceptions of eight coach‑teachers in the Southeastern United States who integrated video analysis, data analytics, goal‑setting and tracking applications, wearable devices and gaming platforms, and reflective communication tools into their coaching practices.

Data were analyzed thematically, revealing three major themes: self‑regulation, self‑mastery assessment, and academic transfer. Findings indicated that SPATs were most effective when used as …

Teachers’ Perceptions Of The Decline In Reading Scores Among Fourth- And Fifth-Grade Students, Brigetta Foules-Sims

Theses and Dissertations

The purpose of this qualitative instrumental case study was to explore teachers’ perceptions of the factors contributing to the decline in reading achievement among fourth- and fifth-grade students in a rural elementary school in a southern state. The study explored teachers’ perceptions of the causes of declining reading performance, the instructional challenges they encounter when addressing reading difficulties, and the resources and supports they believe are necessary to improve student outcomes.

Data were collected through semi structured interviews with eight certified fourth- and fifth-grade teachers. Five themes emerged from the data: (a) increasing academic demands reveal foundational reading gaps, (b) …

Elementary Teachers’ Perceptions Of Differentiating Tier 1 Reading Instruction Within A Multi-Tiered System Of Support Framework, Ivonne Ciresi

Theses and Dissertations

This generic qualitative dissertation explored elementary teachers’ perceptions and experiences of implementing Tier 1 differentiated reading instruction within a Multi- Tiered System of Support (MTSS) framework. Establishing effective systems and supports for comprehensive reading instruction in the Tier 1 classroom is a critical component of MTSS. Given the range of structures required, including instructional routines, resources, and ongoing professional development, it is important to understand how teachers navigate the challenges of differentiating reading instruction. The purpose of this study was to examine how teachers implement differentiation during core reading instruction, the challenges they encounter, and the role of professional learning …

Employee Perceptions On The Role Of Job Demands And Burnout On Employee Engagement In Nonprofit Sector: A Qualitative Descriptive Study, Tania P. Sierra

Theses and Dissertations

This applied dissertation was designed to explore how nonprofit employees perceive the role of job demands and burnout in shaping employee engagement. The study focused on nonprofit organizations in Southern Arizona and used a qualitative descriptive methodology to center employee voice and provide context-rich insights into workplace well-being. Semi-structured interviews were conducted with 15 participants representing diverse roles and career stages. The study aimed to inform nonprofit leaders and stakeholders about the relational and structural conditions that influence engagement, resilience, and emotional labor in mission-driven environments.

Thematic analysis revealed six interrelated themes, including role multiplicity, time pressure, emotional labor, and …

The Investigating Factors Affecting Teacher Retention In Rural Areas, Lajada Robinson

Theses and Dissertations

This dissertation investigated the factors influencing teacher retention in Mississippi's rural communities. The purpose of this study was to identify the specific variables that contribute to teacher retention in rural areas within Mississippi and to investigate strategies for improving teacher recruitment, retention, and job satisfaction. A mixed-methods research design was utilized, which included quantitative surveys and qualitative interviews with teachers, administrators, and education stakeholders in rural Mississippi.

By conducting a mixed-methods research design incorporating quantitative and qualitative interviews, the study sought to collect comprehensive data from teachers, administrators, and education stakeholders in rural Mississippi. The study explored key factors such …

The Lived Experiences Of Hispanic Women In The Workforce: The Journey To Leadership And Leadership Styles, Ileana Sanchez

Theses and Dissertations

This qualitative study explored the lived experiences of Hispanic women in leadership positions within the United States workforce. Grounded in Interpretive Phenomenological Analysis (IPA), the study examined how Hispanic women interpreted the challenges and opportunities associated with their intersecting identities as both Hispanic and female leaders. Data were collected through semi-structured interviews with eight Hispanic women currently serving in leadership roles across diverse industries.

Findings revealed that participants encountered persistent systemic barriers, including underrepresentation, intersectional discrimination, limited access to mentorship and leadership networks, and pressures to conform to dominant workplace norms through code-switching. These challenges were cumulative and embedded within …