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Temporospatial Deep Learning Strategies For Prediction Of Disease Progression In Radiology, John D. Mayfield

USF Tampa Graduate Theses and Dissertations

While the fields of machine learning and medicine are deeply rooted in axiomatic scientific principles, there is an element of art that makes the practice imperfect, yet innately human. As the two fields have seen the greatest overlap in their collective history, there remains a chasm between them in terms of practical translation for the patients who desire and deserve personalized medicine. As presented in this dissertation, I and my collaborators have contributed to the groundwork for future exploration of predicting disease progression by identifying signals within sequential medical imaging to provide a temporospatial relationship upon which we can make …

Surface Modification Of Poly(4,4'-Oxydiphenilene Pyromellitimide) With Low-Pressure Plasma Treatment, Cihan Aktas

USF Tampa Graduate Theses and Dissertations

This study explores the change of the wetting characteristics of commercially availablepolyimide (PI), Kapton® HN, films a type of poly(4,4′-oxydiphenylene-pyromellitimide), following treatment with low-pressure plasmas of carbon tetrafluoride (CF4), air, hydrogen (H2), carbon-dioxide (CO2) and oxygen (O2) gases as well as the surface texturing via laser-exposure procedure. The water contact angle (CA) and surface free energy (SFE) of untreated PI films were determined as 82.4°±0.8 and 45.0±0.3 mN/m, respectively. After CF4 plasma gas treatment, the CA value of PI films increased to 110.2°±1.0, while it decreased to 9.3°±2.3 after O2 plasma gas treatment. The surface free energy (SFE) of PI …

Development Of A Suspended Aerobic Membrane Bioreactor (Sambr) For Sustainable Wastewater Treatment On Early Planetary Bases, Talon James Bullard

USF Tampa Graduate Theses and Dissertations

Environmental Control and Life Support Systems (ECLSS) ideally should treat all “waste” streams for recovery in a sustainable and near closed-loop manner. This will be critical for Partial Gravity Habitats (PGH) and Early Planetary Bases (EPB) that will be established on the Moon and Mars due to the lack of readily available resources. Currently, the Water Recovery System (WRS), onboard the International Space Station (ISS), recovers and purifies water from urine and graywater. While efficient, this system is not optimized for future missions and utilizes physical-chemical technologies that operate with single-use and hazardous consumables. In response to the lack of …

Brain-Inspired Spatio-Temporal Learning With Application To Robotics, Thiago André Ferreira Medeiros

USF Tampa Graduate Theses and Dissertations

The human brain still has many mysteries and one of them is how it encodes information. The following study intends to unravel at least one such mechanism. For this it will be demonstrated how a set of specialized neurons may use spatial and temporal information to encode information. These neurons, called Place Cells, become active when the animal enters a place in the environment, allowing it to build a cognitive map of the environment. In a recent paper by Scleidorovich et al. in 2022, it was demonstrated that it was possible to differentiate between two sequences of activations of a …

Integration Of Algae And Biomass Processes To Synthesize Renewable Bioproducts For The Circular Economy, Jessica Martin

USF Tampa Graduate Theses and Dissertations

Rapid population growth and global industrialization have substantially heightened the demand for fossil-based fuels and products in various sectors of the global economy, including energy production, transportation fuels, and as raw materials for petrochemicals. The intense consumption of fossil fuels has caused immense environmental impacts, especially pertaining to carbon dioxide emissions. Shifting to renewable feedstocks (raw materials) is expected to reduce these emissions by lowering the carbon footprint of fuels and products compared to traditional fossil-derived alternatives. This transition aligns with the goal of creating a sustainable and circular economy, emphasizing efficient resource use, and reducing waste generation through recycling …

Algorithmic Design In Recommender Systems: Expanding Dbe Participation In The U.S. Construction Industry, Dick C.E. Davis Ii

USF Tampa Graduate Theses and Dissertations

The multifaceted U.S. construction environment, characterized by vast projects and intricate agreements, is anchored in trust, exemplified by bonding. For Disadvantaged Business Enterprises (DBEs), the bonding process can be challenging.

This dissertation provides an in-depth evaluation of the "System for facilitating a project between contractors and owners," a patented methodology innovatively developed by my father, Dr. Dick Davis, Sr. and later approved through my research efforts, as indicated by the patent number US8346582B1. The system adeptly gathers and processes data from owners, projects, and contractors. Despite its proficiency in managing extensive contractor and project data, the system faces challenges in …

Multi-Model Digital Twins With Ai Forecasting For Seed To Stand Supply Chain, Rania Sherif Elashmawy

USF Tampa Graduate Theses and Dissertations

The present dissertation embodies a multi-faceted investigation aimed at enhancing strawberry production pre-harvest and post-harvest quality through data-driven approaches. It unfolds multi-stages framework.

The first stage presents a complete data collection and its preliminary statistical analysis obtained from the first phase of a large-scale soil study on how to improve strawberry production and achieve sustainable and high-quality harvests through sensor-assisted real-time field monitoring. Six real-time loggers were placed in an operational commercial strawberry farm in Central Florida for the entirety of a harvest season from soil preparation to planting to harvesting. Along with high-resolution soil sensory measurements including water content, …

Swelling Induced Buckling Of Photopatterned Hydrogel Beams, Chinar Yogesh Kokaje

USF Tampa Graduate Theses and Dissertations

The main goal of this study was to learn more about swelling induced buckling of surface-attached gel lines photo-patterned from thermally responsive polymers. A library of 10 different polymer compositions was synthesized using methacryloyloxybenzophenone (MABP) as the photo-cross-linking monomer. For each of the polymers, a series of beam-like patterns were prepared on polystyrene tissue culture dishes by first depositing a known amount of polymer into the tissue culture dish followed by pattern generation using a photo-lithography mask with line widths of 10, 20, 30, 50, and 80 μm. The target height of each polymer line was 100 μm. After development …

Validating The Correlation Between Illuminance, Nighttime Crash Frequency And Demographic Characteristics On Roadway Segments In District 7, Florida, Aditi Sugeerappa Hoti

USF Tampa Graduate Theses and Dissertations

For a long time, streetlights have proved to be an effective tool to help users access roads safely. Hindrance to good visibility at nighttime has been attributed to accidents on the road. Florida is considered to have very dangerous roads due to careless driving which increases as nighttime approaches. Much empirical research has contributed to the attention nighttime crashes receive. This study examines the influence of roadway characteristics along with socio-economic factors on crashes through statistical and spatial analysis of roadway segments in Tampa Bay Region. Illuminance data, crash data and socio-economic data for roadways facing nighttime crashes under low-illuminance …

Understanding Graduation Rates By Sex By Evaluating The Quality Of Student Interactions With Faculty And Academic Advisors, Michael John Bolen

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to assess whether student satisfaction with faculty and academic advisors varied based on the sex of the student and the students’ academic college at a large public university in the Southeast. With the university aiming to improve its graduation rates, particularly male graduation rates, the Theory of Student Departure was used as a guide in identifying student interactions with faculty and academic advisors as potential factors impacting student persistence to graduation. Previous research suggests that the quality of the interactions that students have with faculty and academic advisors can vary based on the sex …

The Great Resignation: An Exploration Of Strategies To Combat School Bus Driver Shortages In The Post-Covid-19 Era, James E. Cole Jr.

USF Tampa Graduate Theses and Dissertations

Leading school transportation providers have been turning toward data-driven incentive programs to engage, motivate, and get the best out of their school bus drivers, but the nationwide school bus driver shortage has emerged as a pressing issue of critical importance affecting the education system, transportation infrastructure, and safety of students across the United States. School bus driving is one of the most challenging driving jobs, and low wages, demanding schedules, stringent licensing requirements, and the COVID-19 pandemic have exacerbated the shortage of drivers. Identification of strategies to improve school bus driver retention was the objective of this qualitative phenomenological study. …

Syntheses, Photophysics, & Application Of Porphyrinic Metal-Organic Frameworks, Zachary L. Magnuson

USF Tampa Graduate Theses and Dissertations

Porphyrins are a group of heterocyclic macrocycles that play crucial roles in various biological processes such as electron transfer, catalysis, and sensing. Hemoglobin, which carries oxygen in the blood of mammals, and chlorophyll, which drives photosynthesis in plants and algae, are both porphyrins. The ability of porphyrins to bind metal ions and their unique electronic and photophysical properties make them an excellent platform for designing functional materials for various applications, often drawing inspiration from their function in nature. Metal-organic frameworks (MOFs) are a class of porous materials that have been extensively studied in recent years due to their high surface …

In Silico And In Vitro Drug Discovery Strategies And The Chemical Investigation Of Endophytic Fungi, Sarah Grace Dietrick

USF Tampa Graduate Theses and Dissertations

The biodiversity of our global marine ecosystems provides substantial treasure to discover: chemistry. Marine organisms that live in proximity to one another use their unique chemistry to compete with one another and thrive in their environment. Benthic invertebrates, specifically, that lack physical means of protection will produce secondary metabolites as a means of defense from their surroundings and predators. The compounds which they produce are ordinarily species-specific, highly diverse biomolecules. Biosynthetic processes within an organism construct these secondary metabolites from fragments of primary metabolites (amino acids, fatty acids, sugars, and so on). Their roles in protection have antibiotic, toxic, and …

Student Perceptions Of The Nonmedical Use Of Prescription Stimulants And Preferences For Health Education, Ana Gutierrez

USF Tampa Graduate Theses and Dissertations

Nonmedical use of prescription stimulants (NMUPS) for the purpose of improving academic performance is a growing concern among the college population. According to the Substance Abuse and Mental Health Services Administration in 2020, rates of NMUPS were highest among 18–25-year-olds attending college. There are several adverse health outcomes associated with NMUPS, including cardiovascular damage, seizures, psychosis, and dependence. Given the rising rates of NMUPS in this group, and the negative health outcomes associated with NMUPS, it is vital to employ health education that allows students to make informed decisions about behaviors that impact their health. The purpose of this study …

All Quiet On The Digital Front: The Unseen Psychological Impacts On Cybersecurity First Responders, Tammie R. Hollis

USF Tampa Graduate Theses and Dissertations

Driven by the increasing frequency of cyberattacks and the existing talent gap between industry needs and skilled professionals, this research study focused on the crucial human element in the domain of cybersecurity incident response. The objective of this dissertation was to offer a meaningful exploration of the lived experiences encountered by cybersecurity incident responders and an assessment of the subsequent impacts on their well-being. Additionally, this study sought to draw comparisons between the experiences of cybersecurity incident responders and their counterparts in traditional emergency response roles. Semi-structured interviews were conducted with a cohort of 22 individuals with first-hand experience working …

The Discussion – Conclusion Section Of Quantitative Versus Qualitative Research Articles In Second Language Writing: Rhetorical Structure And Interactional Metadiscourse, Oksana Bomba

USF Tampa Graduate Theses and Dissertations

This study analyzed and compared the rhetorical structure of the Discussion – Conclusion sections from quantitative versus qualitative research articles (RAs) in the interdisciplinary field of Second Language Writing (SLW). Although Discussion and Conclusion sections are critical components in the RA genre that present a challenge to novice writers, little is known about the rhetorical organization of RA Discussion – Conclusion sections and how quantitative and qualitative research paradigms may shape the ways RA writers present and discuss their findings.

This corpus-based study analyzed the rhetorical structure of the SLW RA Discussion – Conclusion sections from quantitative and qualitative research …

Machine Learning For Electronic Design Automation: Specification Mining And High-Level Synthesis, Md Rubel Ahmed

USF Tampa Graduate Theses and Dissertations

The rapid growth of complex system-on-chip (SoC) designs has presented unprecedented opportunities and challenges in electronic design automation (EDA). This dissertation explores two facets of electronic design automation: message flow specification mining using data mining and natural language processing (NLP) and high-level synthesis (HLS) acceleration using different machine learning (ML) methods. It also discusses an ML model co-optimization method for energy-efficient hardware implementation.

Effective SoC design validation relies heavily on message flow specifications. This dissertation presents an efficient technique for synthesizing finite state automaton (FSA) models from SoC execution traces. The synthesized models can provide valuable insights into the on-chip …

Great Power Cyberpolitics: Re-Interpreting Offensive Realism And Power Transition Theory For Cyber Deterrence, Yavuz Akdaǧ

USF Tampa Graduate Theses and Dissertations

This dissertation assesses the empirical relevancy of realist International Relations (IR) theory in cyberspace and shows how a richer IR-based theory of cyber conflict can enhance the understanding of interstate cyber deterrence, especially in the context of US-Sino hegemonic cyber conflict or cyberwar. As states increasingly engage in cyber conflict by exploiting security vulnerabilities due to global interconnectivity (i.e., the Internet), cyber threat has become relevant for national security. Scholars constructed cyber deterrence to counter the threat using the fundamentals of the Cold War nuclear deterrence. Yet this approach is highly contested; cyberspace defies traditional deterrence concepts. Further theoretical analysis …

Influence Of Thickness And Capping Materials On The Static And Dynamic Properties Of Ferrimagnetic Thin Films, Noha Alzahrani

USF Tampa Graduate Theses and Dissertations

Spintronics traditionally relied on ferromagnetic materials for their strong spin properties but facedissues like large stray magnetic fields. To address these challenges, researchers turned to antiferromagnetic materials with fast spin dynamics, due to their zero net magnetic moment but the lack of a net spin moment complicated operation. In this context, ferrimagnetic materials have emerged as promising alternatives. They combine ferromagnetic and antiferromagnetic traits and feature different magnetic ions in their sublattices. This dissertation explores how film thickness and capping materials affect the properties of ferrimagnetic thin films. Rare-earth transition metal ferrimagnetic amorphous alloys have garnered attention in the realm …

Investigating Self-Regulation For Motivation And Creativity In Entrepreneurship: A Qualitative Study, Maham Khan

USF Tampa Graduate Theses and Dissertations

This qualitative research study investigated the perceptions of instructors in higher education institutions and trainers/mentors in business incubators to support the self-regulatory processes of motivation and creativity among emergent and novice entrepreneurs to initiate and sustain entrepreneurial activities. Seven participants were interviewed (i.e., four higher education instructors, three business incubator trainers/mentors). The data were analyzed using hybrid thematic analysis. The role of instructors and trainers/mentors as mentors may have served as a foundation to support entrepreneurs' self-regulation of motivation and creativity. The findings revealed two themes. The first theme is that entrepreneurship education instructors in higher education and trainers/mentors in …

Learning After Retirement: The Stories Of Three Chinese Senior Citizens, Yanan Li

USF Tampa Graduate Theses and Dissertations

China, with its vast population, has qualified as an aging society. As a response to this, education and learning have become an important means of improving the quality of life for older people in China. The primary objective of this study is to uncover what stimulates three older Chinese individuals to engage in learning activities by exploring their personal stories. The two research questions guiding the study are: (a) How do three senior Chinese citizens describe their life and learning experiences? and, (b) What factors motivate and influence these three senior Chinese citizens to participate in learning activities? In this …

Mechanisms Contributing To Hydrogen-Influenced Early Failure Of Bridge Tendons, David Dukeman

USF Tampa Graduate Theses and Dissertations

Failures in post-tensioned tendons have occurred without warning due to fractures in the high-strength steel strands. These strands are cold-drawn to increase their strength while still retaining the preferential ductile mode of fracture. Recently, a tendon failure that occurred in an upper deviation block of the I-526 James B. Edwards bridge crossing the Wando river showed signs of corrosion and potentially another method of failure, hydrogen embrittlement. One proposed source of hydrogen is through galvanic coupling that may exist between the galvanized steel duct and the steel strands. This coupling, if substantial, can promote hydrogen evolution at the steel strand's …

Durability Of Cfrp/Steel Bond In Natural Weather, Mastour Alsulami

USF Tampa Graduate Theses and Dissertations

Fiber reinforced polymers (FRP) are increasingly being used for infrastructurestrengthening and repair of steel structures. Though there have been several durability studies, exposures used are not representative of outdoor service conditions. Fewer studies have explored the effect of changing outdoor conditions typical in infrastructure use. The goal of the research is addressing this gap by evaluating the performance of commercially available CFRP systems under natural weather characteristic of hot, humid tropical conditions mainly and cold weather secondary in three different locations.

Thirty CFRP/steel joint specimens were prepared in laboratory conditions and exposed to ambient temperature on the Engineering building roofs …

Reynolds-Averaged Navier-Stokes Simulations Of Nearshore Langmuir Circulation And The Formation Of Oil-Particle Aggregates, Juan J. Penaloza Gutierrez

USF Tampa Graduate Theses and Dissertations

Langmuir turbulence in the inner shelf coastal ocean is characterized by Langmuir circulation (LC) or cells that can span the full depth of unstratified water columns. A Reynolds-averaged Navier-Stokes (RANS) simulation strategy resolving full-depth LC coupled with an oil-particle aggregate (OPA) formation model is introduced. The RANS methodology is employed in two different cases. The first case corresponds to a shallow shelf zone of uniform depth, focusing on vertical mixing and transport of OPAs. The second case pertains to a surf-shelf transition zone with variable depth, comprising vertical and horizontal mixing of OPAs. In the latter case, a wave model …

The Contextualization Of Socioscientific Issues In An Age Of Accountability, Karrie A. Wikman

USF Tampa Graduate Theses and Dissertations

The overarching aim of this research was to ultimately support global resiliency through science education, preparing citizens to laudably negotiate the contentious socio-cultural science- and technology-based issues of modern times. Correspondingly, this mixed methods study aimed to move a large, diverse school district toward school environments conducive to contextualized socioscientific issues (SSI)-based learning. Of interest to teachers, administrators, and policymakers, the research investigated the effects of subsuming standards-based objectives within the SSI instructional framework on science achievement. Analysis of variance of multilevel assessment and classroom observation protocol data revealed that students experiencing the SSI intervention showed statistically significant gains in …

Refining The Machine Learning Pipeline For Us-Based Public Transit Systems, Jennifer Adorno

USF Tampa Graduate Theses and Dissertations

According to the Population Division of the United Nations, in the United States, almost 90% of the population will live in urban areas by the year 2050. As the population in a given area increases, higher traffic congestion follows due to an increase of vehicles in the road. A possible way to alleviate congestion could be with widespread use of public transit. However, according to the US Census Bureau, the percentage of individuals commuting through public transportation has been decreasing steadily over time, and the American Community Survey reports that during 2019, only around five percent of the US population …

Optimizing The Dynamic Replacement Of Soft Soils With Sand Using A Fem Tools, Walid Salem A Elsiwi

USF Tampa Graduate Theses and Dissertations

First a dynamic finite element methodology (FEM) was developed to simulate an entire dynamic replacement (DR) program of clay with sand involving multiple poundings. The main objective of this research was to employ FEM and geotechnical test data such as cone penetration test (CPT) data at the site to predict the maximum achievable sand column (SC) depth and the corresponding optimum levels of attributing parameters such as number and height of pounder drops. Another goal was to predict the pore pressure generated in clay due to pounding. A full-scale ground improvement project was used to guide the analytical process. Comparison …

Becoming What One Is: Nietzsche And Buddhism - A Transcultural Perspective, Sarah Linda Jacob

USF Tampa Graduate Theses and Dissertations

Friedrich Nietzsche (1844-1900) prophetically called himself an untimely philosopher. But what inspired this untimely genius? In what follows, I argue that Nietzsche’s philosophical departure from the Western metaphysical and epistemological tradition marks a paradigm shift enabled by the European encounter with the East. My thought is that the “untimely” philosopher was very timely—timelier than his educators and philosophical compadres—because he recognized that the Western religious and philosophical system would be, and had to be, forever altered due to the confrontation with new ontological horizons enabled by new, wholly foreign, perspectives. My argument is founded upon the historical significance of India …

Big Data Analytics For Healthcare Social Media: New Algorithms And Insights, Negar Maleki

USF Tampa Graduate Theses and Dissertations

Over the last two decades, there has been a rapid evolution in information and communication technology, including the emergence of social media. Social media has a significant impact on various fields such as politics, business, culture, education, careers, innovation, and especially healthcare. This influence is not a new phenomenon since a survey from ten years ago showed that up to 78\% of American adults used the internet to look for health-related information for themselves or someone else. With the shift towards on-demand services in society, healthcare is also affected by this trend. Instead of waiting for weeks or months to …

The Performance Of Subgrid-Scale Models In Large-Eddy Simulation Of Langmuir Circulation In Shallow Water With The Finite Volume Method, Seyed Mohammad Javad Zeidi

USF Tampa Graduate Theses and Dissertations

Wind and wave-driven Langmuir circulation (LC) in the upper ocean mixed layer and in shallow inner shelf regions of the coastal ocean has been extensively studied via field measurements and numerical simulations by the ocean turbulence-physical oceanography community. LC consists of counter rotating vortices or cells induced by the wind and surface gravity waves. As with all turbulence regimes, LC is characterized by a wide range of scales, with the largest and most energetic LC scales serving to promote vertical transport (and thereby mixing). However, numerical studies and field measrements of Langmuir turbulence under the influence of coastal boundaries and …