Digital Commons Network^™

Ai-Assisted Spectral Fingerprinting Of Mg-Doped Zno Tracer Phosphors: Tuning Photoluminescence Emission And Investigating Lifetime Via Sol-Gel Synthesis Parameters, Thomas M. Brandte

USF Tampa Graduate Theses and Dissertations

Plastic sorting remains a major driver of recycling costs, and existing infrared (IR) optical identification systems cannot determine material prominence or quality, nor reliably identify dark polymers [1]. This work explores a PVA-stabilized sol–gel and thermal synthesis route for magnesium-doped zinc oxide (Mg:ZnO) as a tunable photoluminescent tracer phosphor.

Lattice-defect control forms the foundation of phosphorescent emission tuning, enabling unique spectral fingerprints to be generated based on synthesis parameters—Mg molar ratio (Mg%), PVA mass (g), and calcination temperature (°C). Photoluminescence (PL) spectra (400–850 nm) were analyzed using Gaussian peak fitting and principal component analysis (PCA), reducing hundreds of spectral features …

Design And Implementation Of A Cross-Platform, Modular Electronic-Nose System, Kaushika Rudraraju

USF Tampa Graduate Theses and Dissertations

Electronic noses (e-noses) are a subject of great research. They are useful in multiple platforms and serve a great purpose in both studies and safety. This thesis presents a portable, modular e-nose platform that spans the full pipeline from sensing to visualization, with emphasis on scalability, repeatability, and straightforward integration. The hardware is organized as swappable sensor modules each hosting multiple commercial sensors and local signal-conditioning networked to a master microcontroller via structured communication protocols. High-resolution acquisition, time alignment, and efficient streaming to a host enable reliable logging and analysis. A controlled exposure chamber and a repeatable sampling protocol (baseline-exposure-purge …

“The Best Laid Plans”: Evaluating How Housing Expectations Impact Prison Reentry, Vittoria A. Gonzalez

USF Tampa Graduate Theses and Dissertations

This study assesses the expectations of housing stability pre-release and evaluates how closely these expectations align with actual housing outcomes. Additionally, this study examines how the alignment between pre-release housing expectations influences recidivism. The aim is to understand how individuals’ perceptions of their housing plans prior to release affect their reentry experiences and to offer insights that may inform policy and program design. Using data collected pre- and post- release within a prison reentry program from 115 individuals, results indicate that higher overall housing concern is associated with slightly higher odds of recidivism, and mismatches between expected and actualized housing …

Mapping Seagrass Extent Using Sentinel-2 Satellite Imagery: A Case Study In Salt River Bay, United States Virgin Islands, Chelsea O. Bryant

USF Tampa Graduate Theses and Dissertations

Seagrass beds provide important services in many coastal ecosystems. They provide habitat and food for a wide range of marine species, stabilize sediments, and prevent coastal erosion. These services support local fisheries and tourism-driven economies. Yet, seagrass ecosystems are threatened by changes in water quality, sedimentation, and other stressors. This study investigated the interannual variability in seagrass extent in Salt River Bay, United States Virgin Islands (USVI), from 2018 to 2024. The goals were to better understand temporal dynamics in seagrass extent and evaluate the influence of turbidity as a driver of seagrass health and distribution. The overarching research question …

What Controls Ice Shelf Isotopic Variability? Local And Global Processes Preserved Within Ice Cores Across The Larsen C Ice Shelf, Antarctica, Orion Laurene Schomber

USF Tampa Graduate Theses and Dissertations

The Antarctic Peninsula (AP) is one of the foremost indicators of anthropogenic global warming as it interacts with both atmospheric and oceanic processes. Although ice shelves across the AP have undergone increased rates of disintegration over the last 30 years, limited in-situ measurements have been investigated. Assessment of three short (~30 m) firn cores (J108, J208, and J409) across the Larsen C ice shelf (LCIS) provide insight into local, regional, and global processes. Average core densities and isotopic variability (δ¹⁸O and δ²H) fall within expected ranges for all cores, indicating signal preservation through firn. However, isotopic maxima in J108 and …

The Dark Side Of Synchrony: Investigating Affective Valence As A Moderator Of The Relationship Between Physiological Synchrony And Team Performance, Caroline N. Deal

USF Tampa Graduate Theses and Dissertations

Team processes are severely understudied, likely given their dynamic nature. Physiological synchrony (PS) may provide a solution, as PS provides a proximal, objective measure of team processes. PS is believed to develop through affect contagion, such that team members who catch each other’s emotions are more likely to physiologically synchronize. Extant research has found relationships between PS and performance; however, many questions remain regarding the nature, scope, and directionality of this relationship. I proposed that PS in the context of a positively valenced emotion would be beneficial to team performance, while PS characterized by a negatively valenced emotion would be …

Oxygen Supply Capacity Of The Atlantic Horseshoe Crab,, Marty Sims

USF Tampa Graduate Theses and Dissertations

The horseshoe crab, Limulus polyphemus, inhabits shallow bays and estuaries where it encounters variable oxygen levels. Moreover, each year, the biomedical industry harvests hemolymph from hundreds of thousands of horseshoe crabs to use in bacterial contamination testing, yet the effects of bloodletting on their physiology are relatively unknown. This study aims to determine the oxygen supply capacity of Limulus polyphemus in relation to environmental hypoxia and biomedical bloodletting. Study animals were collected from the intertidal waters of Tampa Bay, Florida. Experiments included a control group that did not undergo substantial blood-volume reduction and a treatment group from which 10% of …

From Legislation To Lived Experience: Navigating The Expungement Process For Human Trafficking Survivors In Florida, Soriyah A. Khan

USF Tampa Graduate Theses and Dissertations

Human trafficking is an inherently exploitative crime in which survivors are often coerced or forced into committing crimes. As a result, many carry criminal records that impede successful reintegration. To alleviate this issue, criminal record relief statutes have been enacted throughout the U.S. However, little research has examined the effectiveness of these statutes as well as the experiences of human trafficking survivors seeking criminal record relief and the professionals assisting them. Using semi-structured interviews with human trafficking survivors and criminal justice actors in Florida, this study sought to examine the awareness of criminal record relief, their experiences navigating the process, …

Exploring The Behaviors Of Women Who Are Mentally Thriving With Autoimmune Disease: A Mixed Methods Approach, Emilie Ann Ellenberg

USF Tampa Graduate Theses and Dissertations

Autoimmune diseases encompass a variety of conditions that impact millions of Americans, with a higher prevalence among women than men. These diseases involve immune system dysregulation, leading to tissue damage and dysfunction. Despite progress in understanding their underlying mechanisms, important aspects remain inadequately understood, such as the relationships among immune dysregulation, medical outcomes, and psychiatric comorbidities. Preliminary qualitative research indicates that perceived diagnostic invalidation leads to the mental health needs among women with autoimmune diseases often being unmet, and behavioral health help-seeking behaviors being reduced. Although perceived diagnostic invalidation can lead to increased mental health symptomology and decreased help-seeking behaviors, …

Marigold-Silver Nanoparticles (Agnps) Complex: Characterization, Therapeutic Potential, And Future Approaches For Lung Injury Via Antioxidant And Anti-Inflammatory Effects, Navdeep Kaur

USF Tampa Graduate Theses and Dissertations

Chronic respiratory diseases (CRDs) and other lung conditions are a key cause of the problems facing global health, as they greatly increase morbidity, death, and the financial burden. In order to achieve the third Sustainable Development Goal of the United Nations, which is to reduce premature mortality from non-communicable illnesses by one-third by 2030, updated epidemiological statistics are crucial for directing prevention, control, and treatment measures. One of the major reasons of illness and death globally is chronic obstructive pulmonary disease (COPD). Lung damage and the emergence of CRDs, such as asthma, emphysema, COPD, and other respiratory disorders, are largely …

Fort Brooke After 200 Years: A Public Heritage Approach, Alex F. Fawbush

USF Tampa Graduate Theses and Dissertations

Fort Brooke, established in 1824 at the mouth of the Hillsborough River, shaped the growth of Tampa and Florida’s west coast for nearly sixty years and served as the nucleus for the forced removal of Indigenous people. Though the Fort itself has long since vanished beneath the modern city, archaeology has preserved its legacy. Excavations since the 1970s have uncovered rich assemblages of ceramics, glass, military equipment, faunal remains, and domestic refuse. These materials reveal daily life at the post, highlighting the interactions of soldiers, Seminoles, African Americans, white settlers, and Cuban fishermen, while also uncovering the deeper prehistoric, referred …

The Orange Glow In The Sunshine State: Three Visions Of Plato In Florida (1970-1990), Ryan Mcgahan

USF Tampa Graduate Theses and Dissertations

The PLATO network, a collection of mainframe computers, terminals, and educational software, has received an increasing amount of scholarly attention in the last decade as a social precursor to the modern internet. Existing histories have neglected to investigate the ways in which PLATO and its related business enterprise worked to accelerate the shift in university governance away from classical liberal ideas centering the public good and towards a more profit-centered neoliberal rationality. By tracing the rise of PLATO in Florida universities, this paper argues that PLATO aided and was aided by the shifting priorities of American universities in the 1970s …

Connectedness And Belonging: An Autoethnography About Military Veteran Transition, Benjamin A. Smet

USF Tampa Graduate Theses and Dissertations

Military veterans often face profound challenges transitioning to civilian life, yet prevailing narratives focus narrowly on PTSD and combat trauma. This dissertation uses autoethnography to broaden that view, blending personal narrative with theory to explore seven interrelated transition stressors: grief and bereavement, loss of military identity, autobiographical memory, service-connected nostalgia, moral injury, stereotype threat, and socialized masculinity and stoicism. These layered stories illuminate the cultural, emotional, and relational dimensions of transition, showing how isolation, disconnection, and loss of belonging shape veteran experiences as deeply as trauma. The analysis demonstrates that healing emerges not from prescriptive programs but from relational practices …

Barriers To Machine Learning Adoption In Regulated Electric Utilities, Donald R. Shiflet Jr.

USF Tampa Graduate Theses and Dissertations

Machine learning (ML) technologies have the potential to revolutionize regulated electric utilities by improving operational efficiency, enabling predictive maintenance, and optimizing energy management. Despite these advantages, the adoption of ML in this sector lags other industries due to technical, organizational, and regulatory barriers. This research, grounded in the Technology-Organization-Environment (TOE) framework, explores these barriers to uncover actionable solutions for integration. The study identifies key challenges, including explainability, cybersecurity, workforce resistance, and regulatory ambiguity to ML adoption in electric utilities. Utilizing an exploratory qualitative methodology, this approach integrates insights from the literature and industry interviews to rank barriers by frequency, severity, …

An Integrated Pcb-Based Heating And Auto-Ranging Platform For Volatile Organic Compound (Voc) Detection Using Carbon Nanotube Based Sensors, Thomas Kalach

USF Tampa Graduate Theses and Dissertations

This thesis presents the development, characterization, and integration of a novel low-cost, high-dynamic-range sensor platform for the detection of volatile organic compounds (VOCs), leveraging the unique electrical properties of carbon nanotube (CNT) thin films. The platform introduces a fully integrated auto-ranging analog front-end circuit capable of real-time resistance measurement spanning over eight orders of magnitude ranging from tens of ohms to hundreds of megaohms, without compromising signal resolution or precision. This was achieved through a digitally controlled, multi-path feedback architecture and controllable current source.

To further enhance sensor performance, the system incorporates a copper trace heater beneath the sensor array, …

"What's A Computer?" Exploring Insurance Agents' Role In Small Business Cyber Insurance Transactions, Dalton A. Crabtree

USF Tampa Graduate Theses and Dissertations

This mixed-methods study examined how insurance agents' role identity impacts cyber insurance transactions, addressing gaps in professional practice and academic literature. Small businesses increasingly rely on cyber insurance for protection as cyber risk continues to evolve. The study employed sequential explanatory methodology with 25 interviews across three groups: insurance agents (n=15), corporate cyber insurance professionals (n=5), and small business owners (n=5). Thematic analysis using Katz and Khan's Role Episode Model informed development of the Cyber Insurance Role Identity Scale (CIRIS), tested with 100 agents. Six themes emerged. Key findings reveal that successful cyber insurance transactions require agents to transition from …

A Discussion Of Community: An Ethnography Of Designing Asynchronous Video Discussions To Reveal Student Perceptions Of Digital Presence In Online Learning, Chad S. Garcia

USF Tampa Graduate Theses and Dissertations

This mixed-methods digital ethnography investigates how video-based discussions (VBD) influence community building in asynchronous graduate education. Using the Community of Inquiry (COI) framework, this study looks at student experiences in a History of Higher Education class where traditional text-based discussions were replaced with video presentations and peer responses. The research explores how video discussions affect students' sense of presence, how video presence impacts engagement patterns, and which multimedia elements contribute to community development.

Data collection included semi-structured interviews with students and instructors, LMS analytics, video content analysis, and ethnographic observation throughout Spring 2024. Analysis revealed a notable disconnect between traditional …

The Role Of Emotional Stability And Social Confidence In Leading With Vulnerability Moderated By Perceived Trust In The Leader, Perceived Trust In The Team, And Psychological Safety, Adam N. Smith

USF Tampa Graduate Theses and Dissertations

AKTiVe leadership is a foundational cultural model that has been adopted at Florida Health Science Center (Tampa General Hospital). The premise of the model is that treating each other with Authenticity, Kindness, Transparency, and Vulnerability (AKTiVe Model) will lead to cultural change that enhances trust, engagement, and psychological safety, which will in turn drive performance improvement for the organization. It takes years to change the culture of an organization, which highlights the need to focus on sustainability and resilience in the culture. This research aims to understand the personality traits that predict leading with vulnerability.

I focused on vulnerability because …

A Multidimensional Perspective Of Patterns Of Functioning And Well-Being, Lendi Nicole Joy

USF Tampa Graduate Theses and Dissertations

The Center for Behavioral Health Statistics and Quality estimates that 79.4% of U.S. adults will remain free from mental illness each year, but this does not necessarily mean they will enjoy positive psychological health and well-being. Well-being has been associated with positive outcomes such as greater health, longevity, work productivity, and increased social engagement. Thus, it is important for researchers to understand factors contributing to the development of well-being and optimal functioning. The current study used latent profile analysis to classify individuals based on their levels of well-being at ages 23 to 26 years and explored functioning indexes assessed when …

Secondary Ela Mentor Teachers’ Feedback On Preservice Teachers’ Video-Recorded Lessons, Homood Alharbi

USF Tampa Graduate Theses and Dissertations

This dissertation explores the feedback practices of secondary English Language Arts (ELA) mentor teachers and the reasoning behind their feedback to preservice teachers (PSETs) during early field experiences. Motivated by my own experience as a preservice teacher, where the absence of timely, meaningful feedback often left me without needed guidance, I was drawn to study how mentor teachers notice, interpret, and respond to novice teaching. This study focuses not on the mentoring relationship itself, but on the content and rationale of feedback provided by mentors.

Three secondary ELA mentor teachers participated in this qualitative study. Each responded to two video-recorded …

Gender Representation Of Composers In Recommended Wind Band Literature And Prominent Performances, Devon Alexis Gray Porter

USF Tampa Graduate Theses and Dissertations

The purpose of this research was to evaluate gender representation in recommended literature in wind band repertoire and prominent performances. I collected data from music lists approved by the National Band Association (NBA) state chapters, programs from the Midwest Clinic and College Band Directors National Association, music vendor catalogues, the Teaching Music Through Performance in Band series, and Florida Bandmasters Association (FBA) Music Performance Assessment (MPA) past performances. I evaluated names of composers to determine the male-female ratios and quantities for recommended works from these sources. I conducted further analysis to determine if trends existed in the relationships between composer …

Managing/Negotiating The Unexpected: Principals’ Sensemaking Of A School Reopening Policy During A Crisis, The Covid-19 Pandemic, Andrea O'Sullivan

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to investigate high school principals’ Sensemaking of a school reopening policy during the COVID-19 pandemic. I inquired about four high school Principals, in the State of Florida, made sense of an Executive Order to reopen schools during a pandemic. As method, I applied Weick (1995) interpretivist framework of Sensemaking as reconceptualized by Coetzee & Wilkinson (2020), as both a theoretical and an analytic framework for a priori analysis. Weick (1995) included seven guiding principles of identity, retrospect, ongoing, enactments, social, extracted cues, and plausibility. Coetzee and Wilkinson (2020) emphasize an eighth principle of reflection …

An Exploratory Analysis Of Automated Deception Detection For Mental Health Applications, Sayde Leya King

USF Tampa Graduate Theses and Dissertations

Deception in mental health settings can undermine therapeutic relationships, compromise treatment efficacy, and impact patient outcomes. Yet, research shows that mental health clinicians often perform no better than chance at detecting deceptive behavior in therapy. Automated deception detection, leveraging artificial intelligence (AI) and multimodal behavioral cues—such as eye gaze, body gestures, and facial expressions—offers a promising alternative. However, most existing research focuses on high-stakes legal contexts, limiting its applicability to mental health settings.

This dissertation addresses this gap by pursuing three key research objectives using a mixed-methods approach. First, we investigate mental health clinicians’ perspectives on AI-assisted deception detection through …

Physical Activity And Functional Mobility In Adults With Hearing Loss: A Series Of Embedded Studies Within A 6-Month Clinical Trial With Hearing Aids, Sarah L. Bochat

USF Tampa Graduate Theses and Dissertations

Adults with hearing loss engage in low levels of physical activity and demonstrate poor performance on measures of functional mobility. The impact of hearing rehabilitation on these outcomes is not fully understood. Previous investigations were largely quantitative and focused on older adults ≥ 65 years of age who may respond differently to hearing intervention than relatively younger adults. They also tended to focus on exercise rather than global engagement in physical activities and did not report hours of hearing aid use, an important indicator of intervention success. One purpose of this dissertation was to determine the feasibility of collecting accelerometry-assessed …

Teaching Word Combinations Using Matrix Training Via Serious Gaming In Minimally Verbal Children, Nataly Innamorato

USF Tampa Graduate Theses and Dissertations

This dissertation addresses the communication challenges faced by minimally verbal children who use Augmentative and Alternative Communication (AAC), often limited to one-word expressions. The approach used involves gamifying matrix training, an empirically supported method for teaching word combinations and promoting the generalization of language skills. Across three studies, the development of an instructional game is described and evaluated with two populations, typically developing children and children who are minimally verbal. First, it introduces a gamified application of matrix training that provides training in an interactive digital environment. Second, a proof-of-concept was obtained via a multiple baseline across participants with typically …

Healthy Bodies, Moral Minds, And Rural Ideals: Contextualizing Interwar British Childhood And Citizenship Through Children's Country Holidays Fund Vacations, Paula J. Pack

USF Tampa Graduate Theses and Dissertations

This dissertation uses the Children’s Country Holidays Fund (CCHF) as a critical lens to examine how philanthropy, childhood, class, public health, and rural nostalgia intersected within the broader context of citizen formation in interwar Britain. Founded in 1884 to provide country holidays for poor London schoolchildren, the CCHF evolved from a philanthropic response to Victorian slum life into an informal arm of welfare governance by the end of the interwar period. Through its country holidays, the Fund became an active participant in shaping ideals of health, morality, and civic responsibility in a period marked by heightened concern over national vitality …

Affirmation And Aspiration: Black Women Enrolled In Doctoral Programs At A Pwi Striving For The Tenure-Track, Anayah Alicia Walker

USF Tampa Graduate Theses and Dissertations

Black women remain vastly underrepresented in tenure-track positions at research universities in the United States, facing systemic barriers that hinder their academic progression. This study examines the experiences and strategies that contribute to Black women’s preparation for tenure-track positions while enrolled in doctoral programs at a predominantly white institution. Grounded in Black feminist thought coupled with an appreciative inquiry lens, this study utilized the sista circle methodology to capture the narratives of seven Black women from various academic disciplines. Findings revealed three experiences that contribute to Black women’s preparation for tenure track positions: intrinsic motivation, funding and institutional resources, and …

Democracy, Expertise, And The Disinformation Problem, Richard Randall Frohock Iv

USF Tampa Graduate Theses and Dissertations

Experts are an essential part of our social epistemology. They grant us access to knowledge that would otherwise be inaccessible. Because of this, experts are also typically seen as invaluable political contributors. Without expert contributions, public policy risks being ill-informed and therefore incapable of addressing society’s needs. Recently, however, the extent to which expertise should inform public policy has come into question. Fueled largely by disinformation, there is a growing movement against traditional experts. Those within this movement argue that experts have overstepped their bounds and are working against the societies they are meant to be helping. Fearing that that …

Algorithms Of Eversion: Contemporary States And Digital Sovereigns, James Libengood

USF Tampa Graduate Theses and Dissertations

The rapid development of artificial intelligence (AI), the internet of things (IoT), and digitization have pushed digital sovereignty to the top of the governance agenda in the 21st century. This notion is expanded upon in this work through seven chapters encompassing theoretical underpinnings, methodological frameworks, and real-world case studies. It shows how multinational corporations dominate digital coloniality, and how the merge of physical and digital reality or eversion poses challenges. The study compares contrasting governance approaches, such as the European Union’s General Data Protection Regulation (GDPR), geared to ethical AI and data protection, versus BRICS nations’ stance on data localization …

Exploring Culturally Responsive Literacy Practices In Prekindergarten: A Multimodal Approach By Teachers, Deeksha Thonta Aradhya

USF Tampa Graduate Theses and Dissertations

Children from culturally and ethnically diverse backgrounds are often expected to learn within different cultural contexts than those they have experienced in their families, homes, and communities. Some children are rarely exposed to the dominant culture and practices that are highly valued in schools before entering early education settings. When they start (pre)school, young children are often expected to immediately participate in cultural practices that may differ from those at home, which are considered indicative of being successful, ready, or capable. This research aimed to investigate the culturally responsive literacy practices used by teachers in a laboratory prekindergarten classroom. The …