Digital Commons Network^™

Riemann-Hilbert Problems For A Class Of Planar Orthogonal Polynomials, Abril Arenas

USF Tampa Graduate Theses and Dissertations

Planar orthogonal polynomials of degree n are monic polynomials defined by the orthogonality relation,

∫cPn(z)Pm(z)e-V(z) dA(z) = hnδn,m.

where the integration is over the whole complex plane with Lebesgue area measure dA, and hn is a positive norming constant. In this thesis we consider the potential V: CR of the type,

V(z) = |z|2p-2Re Σm j=1 tjzj

we characterize the planar orthogonal polynomials using novel matrix Riemann-Hilbert problems. We pro-pose a Riemann-Hilbert problem of size 2px 2p when the maximal degree satisfies m ≤ p. For m = 2p, we propose a Riemann-Hilbert problem of size 3px 3p for the …

Netflix, Between Intercultural Exchange And Monopolizing Tendencies: Streaming Consumption, Production, And Distribution In Romania, Ana-Maria Calancea

USF Tampa Graduate Theses and Dissertations

This thesis examines the development and involvement of the SVOD platform Netflix in Romania in the context of a global media corporation engaging with a local market. Romania’s status as a former communist country acts as a good case study highlighting the long-term consequences of diverse content deprivation. I argue that in a country such as Romania, a service like Netflix can provide a so-called indirect intercultural exchange through the production and distribution of easily accessible diverse content, whether that diversity stems from nationality, ethnicity, race, sexuality, or any unconventional form of expression that was restricted or censored in the …

Clinical Features, Laboratory Characteristics, And Outcomes Of Covid-19 Patients In A Tertiary Care Reference Hospital In Panama City, Panama. A Retrospective Observational Study, Santiago E. Hernandez Bojorge

USF Tampa Graduate Theses and Dissertations

Latin America experienced some of the world’s highest COVID-19 mortality rates, yet data on in-hospital outcomes and their social and geographic determinants remain limited. This dissertation investigated multilevel baseline factors associated with in-hospital mortality among adults with COVID-19 at Panama’s largest public tertiary hospital (Hospital Santo Tomás), integrating survival, mediation, and spatial-temporal modeling within a causal-inference framework.

A retrospective cohort of 1,526 RT-PCR–confirmed COVID-19 hospitalizations (May 2020–November 2021) was analyzed using multivariable Cox proportional-hazards, Fine–Gray competing-risk, mediation, and Bayesian spatial models. Directed acyclic graphs (DAGs) pre-specified causal relationships and minimally sufficient adjustment sets. DAG-guided models quantified total effects without conditioning …

From Marginalization To Prime Consideration: Nuclear Energy In Fragmented Climate Governance, Polarization, And The Age Of Ai, Abdullah Al Jaberi

USF Tampa Graduate Theses and Dissertations

In recent years, nuclear energy has remained sidelined in global climate discussions despite being the world’s second-largest source of low-carbon electricity. This dissertation examined why nuclear energy should be the global priority decarbonization strategy, based on an evaluation of its unique position across the following three dimensions: fragmented international climate governance, political polarization in democratic countries, and unprecedented baseload electricity demands created by artificial intelligence infrastructure. This study does not argue causal linkages among these dimensions; rather, it demonstrates that nuclear energy succeeds concurrently across all three. A mixed-methods approach was employed, including document analysis of bilateral agreements and official …

Temporally Modulated Acoustic Environment Alters Inferior Colliculus Tonotopy And Improves Neural Gap Encoding In Aged Cba/Caj Mice, Luis Franco-Waite

USF Tampa Graduate Theses and Dissertations

Age-related hearing loss (ARHL) is an omnipresent and progressive decline of hearing that occurs later in life and affects a significant majority of the aged population. While the current accommodations for hearing loss focus on improving comfort and quality of life, they do not address the underlying neural aspects of ARHL. A novel approach for treatment is the augmented acoustic environment (AAE) which utilizes the innate plasticity of the nervous system in response to the external environment. The work presented here documents the research performed on passive noise exposures which target neural aspects in animal models of age-related hearing loss. …

Exploiting Chaotic Antenna Arrays For Rf Fingerprint Authentication And Physical Layer Security In Wireless Communications, Joshua K. Thomas Ranstrom

USF Tampa Graduate Theses and Dissertations

Modern wireless networks support a wide range of applications including consumer devices, healthcare monitoring, industrial automation, smart grids, and military platforms, in which transmitted information is often highly sensitive and subject to stringent confidentiality and integrity requirements. As wireless communication operates over an open broadcast medium it exposes systems to physical layer (PHY) threats such as eavesdropping, in which an adversary passively intercepts transmitted information, and spoofing, in which a forged transmission misleads the receiver about device identity. Cryptographic defenses address both threats but require computational assumptions and key management infrastructure that may not scale to dense or resource-constrained deployments. …

Geospatial Understanding Of Foundation Models: Self-Supervision, Robustness, And Resource-Constrained Learning, Gilbert Kibet Rotich

USF Tampa Graduate Theses and Dissertations

Research on large-scale geospatial understanding from satellite imagery remains relativelyunderexplored. Much of the field still relies on narrow, task-specific pipelines, and there is lim- ited work on developing true foundation models or on systematically evaluating how well these models generalize under domain shift, geographic variation, and real-world scene diversity. This dissertation advances foundation-model pretraining and evaluation for remote sensing along three complementary axes. First, we develop self-supervised multispectral pretrained models for satellite image classification by adapting BYOL, BarlowTwins, DINO, MoCo, and Simsiam to multispectral inputs, addressing the limited amount of curated satellite datasets relative to ImageNet. Pretraining on Eurosat and …

Examining Perceptions Of Minority Underrepresentation Among The United States Special Forces General Officers (O7-O10), Vincent X. Telfare

USF Tampa Graduate Theses and Dissertations

While the broader Department of Defense (DoD) has implemented important initiatives to advance equitable representation, the United States Army Special Forces (SF) has historically had a different distribution of diversity among General Officers (O7 to O10). This study explored the perceptions underlying this disparity through a qualitative narrative inquiry, using semi-structured interviews with selected retired SF officers of O6 and higher ranks. By examining participants' career experiences and perspectives on the Army's promotion system, this study seeks to illuminate the structural and cultural underpinnings that affect minority promotions to General and senior leadership positions in the Special Forces. Of course, …

Death And Things: Toward A Theory Of Self-Holding Objects, Kirsten J. Lee

USF Tampa Graduate Theses and Dissertations

This dissertation examines how material objects function as existential supports under conditions of cultural exclusion. Drawing on Terror Management Theory (TMT), minority stress theory, and José Muñoz’s concept of disidentification, it introduces the construct of self-holding objects: possessions imbued with identity-sustaining meaning that stabilize the self. Study 1 employed a qualitative photovoice design with 16 queer adults and identified five primary existential functions of meaningful objects: affirming worth, regulating the body, mirroring the self, authorizing possibility, and enabling worldmaking. These findings suggest that objects operate as material anchors within distributed systems of meaning. Study 2 experimentally tested whether imagining the …

Implementing A Brief Dialectical Behavior Therapy-Informed Skills Group In A County Jail: A Mixed Methods Approach To Understanding Feasibility And Acceptability, Meaghan E. Brown

USF Tampa Graduate Theses and Dissertations

Correctional institutions unintentionally function as one of the largest mental health providers in the country. Short-term facilities, like jails, present an opportunity to provide mental health care to those who will quickly reenter our communities. Despite this, evidence-based practices and treatments in correctional settings have been implemented at slower rates compared to community settings and mental health institutions. Regulating emotions, refraining from impulsive maladaptive behavior, and communicating effectively are considered primary treatment needs among jail inmates. Dialectical Behavior Therapy (DBT; Linehan, 1993) can address these deficits and is commonly implemented in a skills training group format in correctional settings; however, …

“Why Does My White Coat Feel So Tight?”: A Program Evaluation Of Well-Being Support For Physician Assistant Students, Danielle Castro

USF Tampa Graduate Theses and Dissertations

This dissertation presents a program evaluation of the Wellness Initiatives (WI) Program in the University of South Florida’s Physician Assistant (PA) Program, an accelerated 24-month graduate curriculum. The problem of practice is that PA students reported burnout, feeling overwhelmed, and difficulty navigating support within a year-round structure that did not consistently align with centralized university services. Guided by Theory of Change as the theoretical framework and Improvement Science as the conceptual framework, the evaluation examined how iterative wellness supports shaped students’ perceptions of well-being across six implementation cycles (May 2023–March 2025). A convergent parallel mixed methods design integrated survey data …

Mentoring Mentalities Made Manifest: Toward A Better Understanding Of Secondary Teacher Mentor Professional Learning, Practice, And Self-Efficacy, Maggie L. Wilson

USF Tampa Graduate Theses and Dissertations

Teacher shortages are becoming increasingly problematic nationwide. Teacher mentoring has been found to be an effective method of curbing teacher attrition, but little attention has been addressed to ensuring that teacher mentors are receiving the most relevant professional learning experiences to bolster their self-efficacy and mentoring practice. This qualitative study, drawing on research traditions such as grounded theory and case study, seeks to illuminate the mentor self-efficacy and practice of secondary teacher mentors and to understand the role their professional learning plays in how and how well they enact their mentor roles. Through qualitative interviews, including artifact-based interviews, this study …

Secure Machine Learning In Networking Systems, Wenwei Zhao

USF Tampa Graduate Theses and Dissertations

With the rapid integration of Machine Learning (ML) into networking systems, ensuring the security and trustworthiness of these intelligent frameworks has become a paramount concern. While ML offers unprecedented capabilities in spectrum management and collaborative learning, it also introduces novel vulnerabilities that can be exploited by sophisticated adversaries. This dissertation investigates and addresses critical security challenges across three key dimensions of ML-driven networking: adversarial spectrum sensing, the security of privacy-preserving unlearning processes, and efficient post-attack model recovery.

First, we address the threat of adversarial spectrum attacks in cognitive radio networks, where malicious nodes manipulate sensing reports to disrupt spectrum access. …

Critical Discourse Analysis Of Turnaround Leadership Competencies Using A Transformative Leadership Framework, Kevin D. Mcdonald

USF Tampa Graduate Theses and Dissertations

School turnaround leadership has become a leading strategy to address school underperformance emphasizing rapid and dramatic improvement in a school within the bottom five percent of schools as measured by gains in both mathematics and English Language Arts. However, prevailing turnaround leadership discourse largely centers technical and managerial competencies, often marginalizing leadership practices oriented toward equity, advocacy, and social transformation. This narrowing of leadership is particularly consequential for Black male principals, who are disproportionately assigned to low-performing and turnaround schools and whose leadership practice frequently reflects core elements of transformative leadership.

The purpose of this dissertation was to explore current …

Teachers' Perspectives On The Inclusion Of Children With Autism In Preschool And Kindergarten Programs Within Inclusive Classrooms In Saudi Arabia, Budur Alsalamah

USF Tampa Graduate Theses and Dissertations

In recent years, Saudi Arabia has witnessed a significant increase in the number of students with autism being integrated into mainstream classrooms. This is thanks to laws and regulations enacted to provide appropriate education for students with special needs, particularly those with autism, in less restrictive environments. This is a positive step towards providing equal educational opportunities for students with special needs. However, teachers' views on integrating children with autism into mainstream education remain varied. Studies have shown that teachers with positive attitudes towards inclusion are more likely to provide inclusive education in the classroom (Dev & Hayes, 2015). This …

Housing Affordability Analysis Of Hillsborough County, Fl, Usa – Quantitative And Geographical Analysis Using Spatiotemporal Data, Bomin Koh

USF Tampa Graduate Theses and Dissertations

Housing affordability assessments rely on the 30 percent income method and generalized linear regression (GLR)-based hedonic price modeling. Both provide broad insights but fail to capture spatial heterogeneity in affordability challenges. This study upgrades housing affordability assessment approaches by incorporating the residual income method and Geographically Weighted Regression (GWR). The primary objective of this study is to determine whether methodological improvements, residual income method and GWR, yield significantly different results and provide a more accurate and spatially adaptive understanding of affordability dynamics in Hillsborough County, Florida.

The 30 percent income method is widely used and classifies households as cost-burdened if …

The Power Of A Princess: Rebranding For A New Generation, Victoria A. Heath

USF Tampa Graduate Theses and Dissertations

The lyric “Well, that sounds an awful lot like princess problems” from Snow White (2025) reflects Disney’s evolving portrayal of its princesses as more self-aware and independent. This shift is echoed in earlier live-action adaptations, such as Beauty and the Beast (2017), where Belle’s longing for “adventure in the great wide somewhere” signals her rejection of a limited, traditional role. Guided by Feminist Film Theory and media framing, this study examines how Disney’s rebranding of princess characters in Beauty and the Beast (2017), The Little Mermaid (2023), and Snow White (2025) reflects contemporary ideals of empowerment. Through narrative content and …

How Do Water Utilities Meet Growing Demand And Maintain Resilience Through Water Reuse? A Systems Thinking Approach, Elizabeth F. Vicario

USF Tampa Graduate Theses and Dissertations

Water and wastewater utility management is becoming increasingly complex due to factors like urbanization, climate change, new regulations, and rising costs. Utility leaders must balance competing political and financial pressures while managing aging infrastructure, rising demand, climate resilience planning, and customer concerns about affordability. Reuse of treated wastewater has emerged as a promising solution to address scarcity, declining source water quality, and new regulations on wastewater discharge in the United States. However, water reuse is not one-size-fits-all, and bespoke solutions are needed to optimize economic, environmental, and social returns from this finite resource. Despite growing interest, little is known about …

Making Sense Of The Body: Cognitive Science, Disability, And Embodiment, Cheyne L. Joslin

USF Tampa Graduate Theses and Dissertations

The purpose of this project is to analyze different methodological approaches in the philosophy of cognitive science, with the goal of determining their usefulness for explaining and understanding bodily awareness and skill-acquisition over time. The examples of skill-acquisition are limited to motor control, impaired by various kinds of disability—but then acquired over time, via technological or rehabilitative means. These phenomena of motor learning are then viewed through the lens of two competing theoretical approaches in cognitive science: neuromechanical cognitive science, and radical enactivist cognitive science.

The strengths of the neuromechanical framework are found in its historical pedigree, and in the …

Semiotics Of Difference: Language, The Body, And Haitian Personhood In The Dominican Republic, Benjamin Puterbaugh

USF Tampa Graduate Theses and Dissertations

The present dissertation is an ethnographic and multimodal semiotic analysis of the role of signs in the daily life of Haitians in the Dominican Republic (DR). I investigate how language and other embodiments of Haitian alterity are perceived and ascribed value by hegemonic social orders. I center the analysis on the popular perceptions of the Haitian person-type or characterological figure (Agha, 2003) as (over)determiners of actual Haitian subjectivity. I investigate the ways that Haitian personhood is translated, that is, perceived and assigned value, in the Dominican context, and the implications this has on realities of Haitian immigrants. In addition to …

Subsistence And Settlement In Northwest Florida During The Late Archaic-Early Woodland Transition (3500 Bc Through Ad 300), Kerri A. Klein

USF Tampa Graduate Theses and Dissertations

This research presents quantitative and qualitative data on subsistence and cultural transitions in a warm-temperate area of northwest Florida during the Late Archaic-Early Woodland transition (from about 3500 – AD 300). By completing an inventory of the faunal assemblages from two shell middens, I was able to evaluate resource selection and use both within and between sites. Results suggest that site inhabitants utilized consistent resources, despite any documented or potential climatic and ecological change which occurred. Radiocarbon dating establishes the timelines for both Sam’s Creek Cutoff (8FR754), a single-component Late Archaic campsite, and Depot Creek (8GU56), which has a Late …

The Theatrics Of Political Representation: Homestyle, Boundary Work, And Emotional Labor Among Florida Legislators, Donald E. Mullins

USF Tampa Graduate Theses and Dissertations

This dissertation examines how political representation is performed and sustained in the Florida Legislature. Rather than treating representation primarily as votes, bills, or policy outcomes, it approaches it as interactional work through which legislators remain believable, accessible, and authoritative across overlapping audiences. Grounded in an interpretivist epistemology and Goffman’s dramaturgy, the study develops an ethnographic account of representation through three analytic anchors: Fenno’s homestyle, Lamont’s boundary work, and Hochschild’s emotional labor. Methodologically, the project draws on ~100 days of participant observation during the 2025 legislative season, hundreds of pages of fieldnotes, and semi-structured interviews with ten Florida legislators. The findings …

“Makes Me Wanna Holler”: Psychological Safety In Program Development Under Anti-Dei Legislation, Derrick B. Johnson

USF Tampa Graduate Theses and Dissertations

This evocative autoethnographic study explores the professional and emotional experiences of a Black male higher education administrator who developed a college success program for Black male students at a mostly White institution in Northeast Florida. The research took place as new state laws against diversity, equity, and inclusion (DEI) were introduced, showing how these changes disrupt DEI efforts. By using narrative inquiry, the study emphasizes how laws, campus culture, and racial expectations directly affect the emotional intelligence and professional identity needed to support Black male student success.

By focusing on the author's personal experiences, this evocative autoethnography shows the emotional, …

Encouraging A United Response: A Systematic Review And Mixed-Methods Collaborative Evaluation Of Co-Responder Model Effectiveness In Florida, Kelsey Greenfield

USF Tampa Graduate Theses and Dissertations

Even before the deinstitutionalization movement caused the influx of state hospital patients into communities ill-prepared to navigate their needs, law enforcement has been responsible for responding to persons in crisis (PIC) due to mental illness. In response to the high rates of incarceration for persons with mental illness (PMI), a growing number of law enforcement agencies have adopted diversion strategies referred to as police-mental health collaboration (PMHC) models to divert PMI away from the criminal justice system and towards community mental health services. Despite nearly forty years of research, there are still considerable knowledge gaps regarding who benefits from PMHCs …

Master’S Students: Experiences, Transitions, And Needs In The College Of Education, Brandi L. Sanchez

USF Tampa Graduate Theses and Dissertations

This qualitative case study explores the experiences, transitions, and needs of first-year master’s students in education. Guided by Schlossberg’s Transition Model, the study examines how students perceive shifts in academic rigor, workload, and the increased self-direction required in graduate education. The case study used three data collection methods: semi-structured interviews, document analysis, and observations that provided insights into the student perception of master’s students studying education’s experience, transition, and needs. Additionally, this case study enabled exploration of the research questions across six types of master’s programs within the College of Education. By focusing on the first year of graduate study, …

Beyond Alumni Dollars: Developing Engagement With Graduate Alumni, Kyra J. Snyder

USF Tampa Graduate Theses and Dissertations

Alumni engagement plays an increasingly important role in supporting graduate program mission, reputation, and long-term sustainability. Despite its recognized value, limited research examines alumni engagement within graduate level programs from a practitioner perspective. The purpose of this study was to examine perceptions of alumni engagement among alumni, faculty, and staff within the University of South Florida (USF) Physician Assistant Program and to identify any needs or gaps in current engagement opportunities. This study employed a survey-based research design to gather data from two stakeholder groups from the USF PA Program: alumni and faculty/staff. A review of program records provided data …

Transport And Aging Pathways Of Microplastics In Urban Aquatic Systems, Jessica J. Boyer

USF Tampa Graduate Theses and Dissertations

Microplastics are pervasive in urban aquatic systems, which serve as both conduits of particle flow and incubators of microplastics. These aquatic systems transport microplastic particles while simultaneously altering their physical, chemical, and biological properties. Despite their growing environmental relevance, constructed wetlands and riverine systems remain underrepresented in studies of microplastic fate and transport. This dissertation aims to assess the patterns influencing microplastic transport and aging across urban aquatic environments through a combination of field experiments and mechanistic modeling.

Four interconnected studies were conducted to address this objective. The first investigated the horizontal and vertical transport of microplastics within the Se7en …

Understanding And Defending Large-Scale Networked Systems: From Wi-Fi Localization To Provenance- Based Intrusion Detection, Xiao Han

USF Tampa Graduate Theses and Dissertations

Modern networked systems increasingly depend on wireless sensing and large-scale telemetry to provide critical services and maintain security. However, many of these systems function as black boxes or encounter significant scalability limitations, which leave them vulnerable to sophisticated adversaries. In this dissertation, I present my research on enhancing the security and efficiency of networked systems through measurement-driven vulnerability analysis and the design of scalable defense mechanisms.

First, I present my research on the security and privacy risks of Wi-Fi–based localization services. Although location spoofing attacks against Wi-Fi positioning systems have been studied for over a decade, constructing practical attacks in …

Human First: How Journalists Employ Ethics Of Care And Empathy When Covering School Shootings, Grace M. Ficara

USF Tampa Graduate Theses and Dissertations

School shootings have become a regular part of the news media cycle in the 21st century. Now, more than ever, journalists are needing to find innovative, yet empathetic, ways to deal with such crises as they navigate their own professional boundaries. Using the Ethics of Care model, this research intends to showcase how journalists have, willingly or unwillingly, utilized an empathetic approach when covering school shootings and how they use these tools to comfort their sources and themselves. Through semi - structured interviews of 9 participants, this study seeks to connect the practice of journalism with the one thing journalists …

Spin Pumping And Interfacial Anisotropy In Ultrathin Cobalt Heterostructures, Ibrahim Almuhanna

USF Tampa Graduate Theses and Dissertations

Interfaces dominate the behavior of ultrathin ferromagnets, where interfacial spin-orbit coupling(SOC) can strongly influence both magnetic anisotropy and magnetization dynamics. This thesis compares how a heavy-metal interface (Pt) and a semiconducting two-dimensional transition-metal dichalcogenide (TMD) interface (MoSe2) modify the static and dynamic magnetic properties of ultrathin Co. To isolate interface-driven effects, the heterostructure architecture is kept fixed (sapphire substrate and Si3N4 cap) while only the seeding/interface layer beneath Co is varied. MoSe2 is studied in two thickness conditions (monolayer and bilayer) to test layer-dependent trends.

Layer thicknesses are determined by X-ray reflectivity. Static magnetic properties are measured by in-plane vibrating …