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Concentration And Composition Of Organic Contaminants In Blackfin Tuna, Yellowfin Tuna, And The Common Clubhook Squid In The Western Gulf Of Mexico, Lisa Rose-Mann

USF Tampa Graduate Theses and Dissertations

Cephalopods are an important component of pelagic food webs. They play ecological roles not only as predators but also as prey. However, their role as prey in the trophic transfer of organic contaminants to apex predators such as tunas in the Gulf of Mexico (GoM) is not well known. To investigate the importance of cephalopods in tuna diets, stomach samples were collected in February 2020 from tunas caught by rod and reel aboard the F/V Gulf Eagle near two large offshore floating oil/gas platforms in the northwestern GoM. Cephalopod samples were obtained from gut content analysis of 41 tunas caught …

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 …

Phosphorus: From The Origins Of Life To The Origin Of An Industry, Joshua Abbatiello

USF Tampa Graduate Theses and Dissertations

The element phosphorus is a key biogenic element that is often the limiting reagent for life. Phosphorus is quickly bound by metal divalent cations making it virtually insoluble and inert in water (forming the phosphate mineral apatite). Due to this, it becomes imperative to understand alternative pathways to increase biogenically available phosphorus in environments. To that end, this dissertation involved examining olivine as an alternative source of phosphorus to apatite, analyzing a novel grain of iron silicide found via lightning reduction in a fulgurite, and finally sought to understand the impact of phosphate mining through phosphogypsum stacks. Olivine is a …

An Fgfr-P53 Developmental Signaling Axis Drives Salivary Cancer Progression, Julia M. R. Billington

USF Tampa Graduate Theses and Dissertations

Mucoepidermoid carcinoma (MEC) is the most frequently occurring salivary gland malignancy.Here, we investigated transcriptomic profiles of human fetal and adult salivary glands and MEC tumors to assess programs involved in MEC progression. Molecular and genetic analyses revealed that MEC tumors and fetal salivary glands share proliferative and developmental gene expression profiles that implicate an FGFR-p53 signaling axis in salivary MEC progression. Based on these findings, we developed a genetically engineered mouse model of advanced MEC via targeted expression of the CRTC1-MAML2 oncogene in salivary ductal cells. Specifically, CRTC1- MAML2 expression combined with p53 dysregulation in salivary ducts rewires FGF signaling …

The Synthesis Of A Photo-Affinity Probe Library For The Fatty Acid Amide Proteome And The Endocannabinoid System Within, Robert E. Feeney Iii

USF Tampa Graduate Theses and Dissertations

Fatty acid amides are a large family of endogenous metabolites with significant biological activity, including that of the endocannabinoid system. Currently little is known about how this system of tightly regulated compounds works within humans. This work lays the foundation to explore the structure-activity relationship driving the selectivity of ligand-protein interactions involved with fatty acid amides. A library of activity-based proteomic profiling probes for fatty acid amides has been synthesized to this end. Additionally, progress towards phytocannabinoid probes has been made as well.

Corrosion Mitigation And Monitoring Of Bridge Tendons And Failure Forecasting Of Wastewater Force Mains, Stanley Chike Agbakansi

USF Tampa Graduate Theses and Dissertations

Corrosion remains a significant threat to civil infrastructure, resulting in costly repairsand potential structural failures. This dissertation addresses three critical aspects of corrosion: mitigation and monitoring of post-tensioned bridge tendons, and failure forecasting of wastewater force mains due to internal corrosion.

First, the research investigates the effectiveness of corrosion inhibitors (CIs) applied via pressure injection (impregnation) in post-tensioned tendons. The protective mechanisms and long-term performance of various inhibitors were evaluated to identify the most effective formulations. Among the tested inhibitors, MCI-2020 — a water-based, migratory, mixed-type corrosion inhibitor — demonstrated the most promising results, showing excellent corrosion protection while preserving …

Efficient Methods And Algorithms For Analyzing Stochastic Systems, Mohammad Ahmadi

USF Tampa Graduate Theses and Dissertations

This dissertation addresses the challenges of stochastic analysis of safety-critical systems with biological components, where unexpected behavior can lead to catastrophic events. Two fundamental challenges hinder the analysis of such systems: their typically large or infinite state spaces, and the extreme rarity of error states of interest. While Monte Carlo simulation can analyze biochemical systems without storing the state space, accurately estimating rare event probabilities becomes computationally prohibitive. Conversely, probabilistic model checking excels at analyzing extremely low probability events but becomes impractical for systems with large or infinite state spaces due to memory constraints.This work proposes two main contributions to …

Learning Analytics: An Innovative Technological Tool To Help Increase Student Retention And Graduation Rates In Us Higher Education Institutions, Fednold Thelisdort

USF Tampa Graduate Theses and Dissertations

Higher education institutions (HEIs) have embarked on a journey of innovation by adopting learning analytics (LA) in their operation, offering a more sustainable and innovative technological tool to increase student retention and graduation rates in US HEIs. LA, an emerging academic and technological tool, equips HEIs to gather, analyze, and interpret their students’ data. Since the publication of the first (conceptual) framework by Burke (2019), LA has matured into a research focus and practice, implemented in several institutional contexts at different scales and disciplinary/pedagogical contexts. This study explored the impact of the use of LA on student retention and graduation …

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 …

Changes In Immune-Regulated Gene Methylation Over Time In Women Who Do And Do Not Develop Breast Cancer, Kyle Laney

USF Tampa Graduate Theses and Dissertations

Breast cancer survivors face elevated risks of chronic inflammatory conditions and immunedysfunction compared to the general population. These elevated health risks in survivors are well-documented but mechanistically poorly understood. This study aimed to characterize longitudinal changes in DNA methylation patterns of immune-regulatory genes in women who developed breast cancer compared to cancer-free controls. We conducted an EWAS using Sister Study cohort data, analyzing longitudinal changes in DNA methylation by comparing the difference in beta values between pre- and post-diagnosis time points in breast cancer cases versus changes over the same period in cancer-free controls. The analysis included 414 participants: 189 …

Isotopic Fingerprints Of The Coastal Margins: Tracing Dissolved Iron Sources From Land To Sea, Hannah R. Hunt

USF Tampa Graduate Theses and Dissertations

Dissolved iron (dFe) is an essential micronutrient for sustaining life in the surface ocean. Nearly four decades of research dedicated to understanding sources, cycling and biogeochemical modifications of Fe sources in the global oceans has generated a significant body of research supporting the idea that the concentration of Fe in the surface ocean exerts significant controls on primary production and carbon uptake in the surface ocean. Creation of the GEOTRACES program greatly increased the spatial and temporal resolution of high-quality trace element and trace element isotope data revealing new insights into the global Fe cycle, especially through the use of …

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 …

The Role Of Langmuir Circulation In Coastal Flows Driven By Wind, Waves And Tides, Thathsarani Dilini Herath Herath Mudiyanselage

USF Tampa Graduate Theses and Dissertations

Langmuir Circulation (LC) is a wind and wave-driven process and is a key driver of vertical mixing and transport in the ocean. In coastal shelf regions, LC can span the entire water column, linking surface and bottom boundary layers and amplifying turbulent mixing. However, the influence of LC on vertical mixing and cross-shelf transport in shallow, tidally forced coastal waters remains poorly understood. This dissertation addresses this knowledge gap by developing a novel modeling framework based on the Reynolds-Averaged Navier–Stokes (RANS) equations, offering a computationally efficient alternative to more resource-intensive Large Eddy Simulations (LES).

The proposed RANS-based approach is first …

Does Practice Make Perfect? Examining The Impact Of Text-Based Reminders On Adherence In The Helping Our Toddlers, Developing Our Children’S Skills Program, Lauren Patrusky

USF Tampa Graduate Theses and Dissertations

Disruptive behavior disorders (DBDs) are prevalent in approximately 17% of children ages birth to 5 years (CDC, 2023). DBDs can significantly impact a child’s learning, social-emotional wellbeing, and ability to develop and maintain healthy relationship (CDC, 2023). Behavioral parent training (BPT) has been proven effective in reducing disruptive behavior and improving parent-child relationships. However, many families do not fully engage in treatment, leading to poor outcomes for both the child and the family. Chacko (2016) describes BPT engagement as enrolling in treatment, attending weekly sessions, participating in group discussions or role plays in sessions, practicing skills between sessions, and completing …

The Only Constant Is Change: The Role Of Genetic Diversification In Cancer And Beyond, Malgorzata Tyczynska Weh

USF Tampa Graduate Theses and Dissertations

Genetic diversification, the process by which genetic variation arises in a population, is fundamental to evolution by natural selection. Mutation, a central diversification process, fuels adaptation across species, including in cancer. Yet most new mutations are neutral or deleterious on cell fitness, raising the question of how mutation-driven adaptation persists. To explore this paradox, I developed a spatial agent-based model (ABM) in which population fitness emerges from individual cells acquiring mutations at varied rates and with diverse fitness effects. I evaluated model behavior across adaptive states, mutation rates, and distributions of fitness effects. The results show that high mutation rates …

Cinematic Abuse: A Critical Analysis Of Disney’S “Happily Ever After” In The Little Mermaid, Aladdin, And The Princess And The Frog, Erin Michelle Gough

USF Tampa Graduate Theses and Dissertations

This dissertation examines the manner in which three animated Disney princess films cultivate stereotypes and gendered behaviors consistent with domestic violence and thereby encourages viewers to accept and tolerate abuse against women. I argue that due to the dangerous, constricting, and sexist gender roles encouraged by the Walt Disney Corporation, films prime young girls and boys to react to social situations and encounters in a way that mirror the characters’ reactions. Because of the films’ entertainment value, most of the characters’ inappropriate, stereotypical, and often violent behaviors either go unnoticed or are passively accepted. The violence does not have to …

The Epistemologization Of Scientific Knowledge: Scientific Textbooks And Education In The 18th And 19th Centuries, Brian P. Bieganski

USF Tampa Graduate Theses and Dissertations

Philosophy, despite its proclivities towards history and contextualization, often neglects to properly note various characteristics of ideas. In particular, there seems to be a kind of blindness to a key component of how ideas come into being: namely, the role of writing that leads to the preservation and transmission of ideas. Textbooks, for instance, are a key instrument for containing, disseminating, and archiving knowledge of a specific domain that can be used to introduce those complex concepts to newcomers and the unspecialized. As such, a textbook is an epistemic device used for transmitting a condensed constellation of ideas, concepts, formulas, …

Hierarchical Reinforcement Learning (Hrl) In Multi-Goal Spatial Navigation With Autonomous Mobile Robots, Brendon Johnson

USF Tampa Graduate Theses and Dissertations

Hierarchical reinforcement learning (HRL) is hypothesized to be able to take advantage of the inherent hierarchy in robot learning tasks with sparse reward schemes, in contrast to more traditional reinforcement learning algorithms. In this research, hierarchical reinforcement learning is evaluated and contrasted with standard reinforcement learning in complex navigation tasks. We evaluate unique characteristics of HRL, including their ability to create sub-goals and the termination function. We constructed experiments to test the differences between PPO and HRL, different ways of creating sub-goals, manual vs automatic sub-goal creation, and the effects of the frequency of termination on performance. These experiments highlight …

Embedding-Based Deep Learning Frameworks For Multimodal Oncology Data Integration, Aakash Gireesh Tripathi

USF Tampa Graduate Theses and Dissertations

This dissertation presents a cohesive set of novel frameworks developed to address critical challenges in oncology data integration, representation learning, and clinical information extraction. The work encompasses four interconnected projects: MINDS (Multimodal Integration of Oncology Data System), HoneyBee (Harmonized ONcologY Biomedical Embedding Encoder), LLM Extraction (Large Language Model-based Extraction from Pathology Reports), and EAGLE (Embedding Analysis for Generalized Learning in Oncology). Together, these systems enable the unification of diverse cancer data modalities—from genomics and clinical records to histopathology images and radiological scans—creating a robust foundation for advanced machine learning applications in precision oncology. By addressing key barriers in data accessibility, …

Using Stomach Content Analysis To Determine The Trophic Ecology Of Omosudis Lowii, A Deep-Sea Predator In The Gulf Of Mexico, Claire De Noyo

USF Tampa Graduate Theses and Dissertations

Little is known about the feeding dynamics of deep-sea communities, despite their significant ecological importance. Deep-pelagic communities contribute to marine biodiversity and ecosystem stability while directly offsetting climate change via carbon sequestration. Omosudis lowii is an understudied, deep-sea fish found in temperate and tropical waters worldwide, including the Gulf of Mexico. Omosudis lowii have large jaws and distensible stomachs, allowing them to capture prey items larger than their body size. The present seminal study used stomach content analysis to quantitatively describe the O. lowii trophic ecology, providing baseline data regarding diet composition, feeding selectivity, and factors that impact prey selection. …

Branching Corals Modulate Their Hydrodynamic Environment, Enhancing Capture Rates Of Evasive Prey, Kelsey Daniels

USF Tampa Graduate Theses and Dissertations

Reef-building corals obtain nutrients through two primary means: autotrophy (via mutualism with photosynthetic zooxanthellae) and heterotrophy (via feeding). The latter form of resource acquisition is understudied and many aspects of predator-prey interactions between coral and naturally occurring prey species remain unexplored. In this thesis, I elucidate the role of branching coral morphology in shaping the colony’s local hydrodynamic environment and describe how this environment impacts prey capture, particularly among evasive and hydrodynamically sensitive, but highly abundant prey such as copepods. I used acrylic cylinders of three sizes in aquaria to model the structure of coral branches across the range of …

Identification Of Host Nuclear Factors Exploited By Kshv Lana To Maintain Latency, Anandita Ghosh

USF Tampa Graduate Theses and Dissertations

Kaposi’s Sarcoma Associated Herpes Virus (KSHV or HHV-8) is a γ-herpesvirus implicated in multiple lymphoproliferative human cancers and immune dysregulatory diseases. Like other herpesviruses, KSHV has a biphasic mode of infection primarily orchestrated by two viral proteins: the Latency-Associated Nuclear Antigen (LANA), which promotes viral persistence through latency, and the Replication and Transcription Activator (RTA), which triggers lytic reactivation. During latency, the KSHV genome exists as a highly heterochromatinized, extrachromosomal episome in the nucleus, which can be reverted to euchromatin in response to certain stimuli, like stress. KSHV has evolved to exploit numerous host proteins to orchestrate its lifecycle, especially …

Strain In The System: Examining The Relationship Between Adverse Childhood Experiences And Pathways Into Cybercrime, Hannah R. Murphy

USF Tampa Graduate Theses and Dissertations

This study examines the relationship between adverse childhood experiences (ACEs) and cybercriminal behavior among 238 active hackers with verified website defacements identified through the Zone-H archive. Drawing upon General Strain Theory, this research investigates whether childhood trauma influences both the developmental timing and motivational aspects of hacking activities. Using ordinary least squares and ordered logistic regression analyses with country-clustered standard errors, the study tested two hypotheses: (1) that higher ACE scores would be associated with earlier onset of hacking behavior, and (2) that higher ACE scores would predict increased likelihood of engaging in revenge-motivated hacking. Results revealed a complex relationship …

Examining Associations Between Sleep Variability And Treatment Outcomes In A Clinical Sample Receiving Psychotherapy Treatment For Alcohol Use Disorder, Charles A. Manzler

USF Tampa Graduate Theses and Dissertations

Sleep disturbances are highly prevalent among individuals with AUD. Sleep and alcohol have a bidirectional relationship such that alcohol damages sleep-promoting brain regions, and impaired sleep exacerbates cognitive and emotional deficits that can promote alcohol use. Despite the evidence that sleep improves across treatment for AUD, these improvements have had inconsistent associations with treatment outcomes. This may result from previous research focusing solely on mean values of sleep parameters rather than daily within-person variability. Sleep variability is emerging as an important correlate of physiological dysregulation and is connected to a range of negative symptoms that may promote alcohol use. The …

Quantifying Wellbore Effects During Co2 Sequestration In A Saline Aquifer, Uzoma Johnpaul Ajugwe

USF Tampa Graduate Theses and Dissertations

Carbon capture and storage (CCS) is a strategy for mitigating climate change by reducing greenhouse gas emissions from large stationary sources like fossil-fuel-fired power stations. One method of CCS involves carbon dioxide (CO2) sequestration in deep saline aquifers, where supercritical CO2 is injected into an aquifer. The success of such projects depends on accurate predictions of CO2 behavior within the subsurface, which are obtained through numerical simulations.

TOUGHREACT, a renowned simulation tool, models subsurface fluid flow, geochemical interactions, and solute transport, providing insights into the feasibility of CO2 sequestration projects. A critical aspect of these simulations is the apportioning of …

Surface Acoustic Wave Energy Driven Degradation Of Aqueous-Based Methylene Blue, Xieqi Gu

USF Tampa Graduate Theses and Dissertations

This study investigates the degradation behavior of methylene blue (MB) under surface acoustic wave (SAW) excitation, focusing on the effects of power, frequency, hydrogen peroxide (H2O2) concentration, and the use of perovskite oxide catalysts (LFO and LSF). Initial experiments showed that MB concentrations remained stable under SAW at ~10 MHz and ~30 MHz with power levels of 1–3 W in the absence of H2O2, though solution temperatures increased. Upon introducing 1 M H2O2, MB degradation followed a second-order rate constant, with degradation rates increasing with power and significantly higher at ~30 MHz, suggesting that both frequency and power enhance free …

Creative Climates: The Impact Of Different Environmental Exposure On Group And Individual Creativity, Michael P. Hopkins

USF Tampa Graduate Theses and Dissertations

This thesis examined the influence of indoor versus outdoor environmental exposure and individual versus group participation on verbal creativity performance. Guided primarily by Attention Restoration Theory (ART; Kaplan & Kaplan, 1989), it was predicted that outdoor natural settings would enhance creativity through restorative cognitive processes. Additionally, it was hypothesized that groups would outperform individuals due to the cognitive advantages of collective induction and information pooling. Participants (N = 256) completed verbal creativity tasks—Remote Associates Task (RAT; convergent creativity) and Alternate Uses Task (AUT; divergent creativity)—following a 30-minute exposure period in either an indoor student center or outdoor botanical garden setting, …

Investigating Momentary Body Image Disturbance, Affect, And Disordered Eating Among College Students, Allison T. Cunning

USF Tampa Graduate Theses and Dissertations

Despite evidence that eating disorders are associated with elevated mortality rates, increased risk of suicide, and societal and financial burden, treatment outcomes for individuals with eating disorders remain poor. Body image disturbance has emerged as a robust risk factor for the development and maintenance of disordered eating (e.g., overeating, binge eating, purging, restriction) and theoretical and clinical perspectives most commonly operationalize body image disturbance as a trait construct. However, empirical evidence suggests body dissatisfaction may fluctuate, and these fluctuations may play an important role in the relationship between risk factors and disordered eating. The current study employed ecological momentary assessment …

Exploring The Connection Between Mental Health Stigma, Social-Emotional Risk, And Help-Seeking Behaviors Among High School Students, Dorie Ross

USF Tampa Graduate Theses and Dissertations

Throughout the United States, the rate of adolescents experiencing mental health-related challenges continues to rise, impacting their social-emotional well-being. Despite increasing concerns, the majority of adolescents do not seek treatment for mental health problems. One barrier contributing to a lack of help-seeking behaviors is mental health stigma. Furthermore, for students who have sought help for such concerns, there is a lack of consensus on whom high school students turn to for support when seeking help. The current study utilized quantitative methodology in the form of Structural Equation Modeling to examine the complex relationship between social-emotional risk, perceptions of mental health …

Simulation Of Multi-Receiver Solar Power Tower By Enhancement Of Solarpilot Software And A Review Of Absorber Coating Materials For The Receivers, Yasser Mirza Baig

USF Tampa Graduate Theses and Dissertations

Central receiver concentrating solar power (CSP) towers offer significant potential for cost-effective renewable electricity but face increasing optical losses with larger heliostat fields. This thesis introduces enhancements to NREL’s SolarPILOT software through a Python-based API named CoPylot, which enables comprehensive optimization of heliostat field layouts for multi-receiver systems. The enhanced methodology incorporates per-heliostat ray tracing, receiver orientation optimization (tilt angle β), and an incidence-angle-dependent absorptance (α(θ)) model to evaluate optical performance, thermal losses, and techno-economic metrics within an integrated simulation framework.

A case study for Daggett, California demonstrates that transitioning from a baseline single-receiver system (180 m tower, 5×5 m …