Digital Commons Network^™

Porosity And Permeability Extremes In An Eogenetic Carbonate Platform: Mechanisms For Formation And Implications For Fluid Flow, Charles I. Breithaupt

USF Tampa Graduate Theses and Dissertations

Carbonate rocks contain about a third of the worlds drinking water and host 60-70% of proven hydrocarbon reserves. Effective development and management of these resources relies heavily on geologic concepts used to predict the distribution, and magnitude of porosity and permeability in the aquifer or reservoir. Most geologic concepts used for flow prediction have been developed in telegenic limestones, where fracture networks, bedding plains, and conduits hosted in effectively impermeable bedrock control the movement of fluids, and evolution of porosity. However, a growing body of work has recognized fluid flow within eogenetic limestones is fundamentally different, and that new concepts …

Save Water Drink Wine: Challenges Of Implementing The Ethnography Of The Temecula Valley Wine Industry Into Food-Energy-Water Nexus Decision-Making, Zaida E. Darley

USF Tampa Graduate Theses and Dissertations

This study demonstrates the interrelationships of people, food, energy, and water associated with Temecula Valley’s wine industry and reveals contradictions and biases in how people view these resources, which ultimately shape management and policies. The FEW (Food, Energy, and Water) Nexus is an approach increasingly used by policy- and decision-makers to understand the interrelationship of several resources. However, a FEW Nexus approach often lacks in social aspects that influence environmentally and economically sustainable outcomes, especially in the wine and wine tourism industry. When quantitative and qualitative data are available, the other challenge is which assessment to use. Two assessments often …

A Framework For Assessing The Reliability, Availability, Maintainability, And Safety (Rams) Of Decentralized Sanitation, Adefunké Adeosun

USF Tampa Graduate Theses and Dissertations

In established industry sectors, Reliability, Availability, Maintainability, and Safety (RAMS) risk assessments are normally used to compare the risks associated with different technologies on process units. Sanitation solutions are split into traditional wastewater treatment which is centralized treatment and can be classified as an established industry, and decentralized treatment such as pit latrines and septic tank systems which are on much smaller scales. Also they can be classified as non-conventional methods such as reinvented advanced decentralized non-sewered sanitation solution techniques exist mainly in two forms as “Single-User Reinvented Toilet (SURT)” systems or “Multiple-User Reinvented Toilet (MURT)” systems. Advanced decentralized non-sewered …

Efficient Neural Architecture Search With Multiobjective Evolutionary Optimization, Maria Gabriela Baldeón Calisto

USF Tampa Graduate Theses and Dissertations

Deep neural networks have become very successful at solving many complex tasks such as image classification, image segmentation, and speech recognition. These models are composed of multiple layers that have the capacity to learn increasingly higher-level features, without prior handcrafted specifications. However, the success of a deep neural network relies on finding the proper configuration for the task in hand. Given the vast number of hyperparameters and the massive search space, manually designing or fine-tuning deep learning architectures requires extensive knowledge, time, and computational resources.

There is a growing interest in developing methods that automatically design a neural network´s architecture, …

A Novel Magnetic Respiratory Sensor For Human Healthcare, Kee Young Hwang

USF Tampa Graduate Theses and Dissertations

Breathing is vital to life. Therefore, the real-time monitoring of a patient’s breathing pattern is crucial to respiratory rehabilitation therapies such as magnetic resonance exams for respiratory-triggered imaging, chronic pulmonary disease treatment, and synchronized functional electrical stimulation. While numerous respiratory devices have been developed, they are often in direct contact with a patient, which can yield inaccurate or limited data. In this study, we developed a novel, non-invasive, and contactless magnetic sensing platform that can precisely monitor a patient’s breathing, movement, or sleep patterns, thus providing efficient monitoring at a clinic or home. A magneto-LC resonance (MLCR) sensor converts the …

Controlling Properties Of Light: Metamaterials Design And Methodology, Darrick Hay

USF Tampa Graduate Theses and Dissertations

Electromagnetic metamaterials are materials that have designed electromagnetic properties. In general metamaterials are subwavelength and can be treated as homogeneous media with an effective permittivity and permeability. Early metamaterial designs were developed to exhibit electromagnetic responses not typically found in naturally occuring materials, but this is not a strict requirement. Metamaterials have shown promise for applications throughout the electromagnetic spectrum. The goal of this work is to present a coherent methodology for metamaterials design, fabrication and application while also describing all of the relevant physics of the designed metamaterials.

Chapter 1 is comprised of an introduction into the field of …

Analytical Methods And Critical Analyses Supporting Thermodynamically Consistent Characterizations Of The Marine Co2 System, Jonathan D. Sharp

USF Tampa Graduate Theses and Dissertations

Chemical equilibria describing the unique behavior of gaseous and ionic forms of dissolved carbon dioxide (CO₂) in seawater comprise what is known as the marine CO₂ (or carbonate) system. Observations of the marine CO₂ system with high degrees of accuracy, reproducibility, spatial coverage, and temporal resolution are critical for evaluating natural cycles of carbon within the Earth system, as well as chemical and biological responses to anthropogenic CO₂ emissions.

One component of the CO₂ system is the carbonate ion (CO²−₃), a dissolved ion that is produced when carbonic acid (H …

Feasting On Words: What University Students Learn When They Study Food Writing And Food Media, Janet K. Keeler

USF Tampa Graduate Theses and Dissertations

The use of food in college curriculum is unique in its ability to create lasting impact because of the keen interest millennial and Generation Z students have in what they eat and drink. Studying media with food at its core is an underutilized mechanism to show how food intersects with the lives of all people thus encouraging students to look beyond their own experiences to consider the wider society. A program evaluation of 10 semesters of food writing and food media courses at a Florida public university reveals the ways in which students make deeper connections to culture and current …

Unifying Security Policy Enforcement: Theory And Practice, Shamaria Engram

USF Tampa Graduate Theses and Dissertations

Security policies stipulate restrictions on the behaviors of systems to prevent themfrom behaving in harmful ways. One way to ensure that systems satisfy the constraints of a security policy is through the use of security enforcement mechanisms. To understand the fundamental limitations of such mechanisms, formal methods are employed to prove properties and reason about their behaviors. The particular formalism employed, however, typically depends on the time at which a mechanism operates.

Mechanisms operating before a program's execution are static mechanisms, and mechanisms operating during a program's execution are dynamic mechanisms. Static mechanisms are fundamentally limited in the types of …

Multifunctional Metal-Organic Frameworks (Mofs) For Applications In Sustainability, Gaurav Verma

USF Tampa Graduate Theses and Dissertations

Climate change, affordable and clean energy, and responsible consumption and production are some of the important goals to be achieved for sustainable development. The current technologies used to address these challenges are energy and resource intensive. Furthermore, there are various limitations related to cost, storage, scalability and safety.Adsorbent materials are seen as a promising alternative remediation system due to their low energy consumption and minimal chemical waste production. However, most of the traditional adsorbents, such as activated carbon and zeolites lack the structural tunability to have long-term effectiveness and their use is limited. As discussed in Chapter 1, metal organic-frameworks …

The Use Of Spanish Moss As A Biological Indicator To Examine Relationships Between Metal Air Pollution, Vegetation Cover, And Environmental Equity In Tampa, Florida, Yousif Abdullah

USF Tampa Graduate Theses and Dissertations

Studies of inequality in exposure to less common air pollutants, like metals, are often limited by the costs of high spatial resolution measurements. Spanish moss (Tillandsia usneoides) is a promising bioindicator for measuring air pollution due to its lower cost, enabling capture of time-average environmental concentrations at high spatial resolution. This study had three major aims. First, I aimed to use Spanish moss as a bioindicator to characterize ambient concentrations of selected metals (Ti, Cr, Mn, Co, Ni, Cd, Hg, Pb, As, and Sb) in Tampa, Florida. My second goal was to determine the impact of vegetation cover on metals …

Chinese International Students’ Narratives Of Their Experiences In A Graduate Pathway Program: An Exploratory Study, Lu Norstrand

USF Tampa Graduate Theses and Dissertations

Because of the tremendous growth of Chinese international students’ enrollment in American higher education and the rapid rise and development of Pathway programs in American universities, I determined the main purpose of this research was to determine the experiences of three Chinese international students in a Graduate Pathway program at a public four-year university in the Southeastern U.S. Three research questions were addressed:

1. How do three Chinese international students describe their academic experiences in a Graduate Pathway program in the U.S.?
2. How do these students describe differences in their learning experiences between the U.S. and China?
3. How do these students …

Spatial Stereo Sound Source Localization Optimization And Cnn Based Source Feature Recognition, Cong Xu

USF Tampa Graduate Theses and Dissertations

In the process of propagating as a carrier of information in space, in addition to transmitting the information itself, the acoustic signal also contains the position information of the sound source itself and its related physical characteristics. Acoustic signal uses the medium (such as air, water, steel, etc.) in the space to transmit mechanical vibration and longitudinal waves from the sound source to the outside world. The traditional single audio collection device cannot collect position information and sound source characteristic information. Therefore, the signals processed in the audio signal processing process are all mixed source acoustic signals after spatial reverberation. …

Assessment And Integration Of Socioeconomic And Demographic Factors In The Implementation Of Integrated Water Resources Management In The Lake Chad Basin, Nodjidoumde Mbaigoto

USF Tampa Graduate Theses and Dissertations

Most developing countries have responded to the 2002 World Summit on Sustainable Development (WSSD) call to implement Integrated Water Resources Management (IWRM) in their national water policy to reach water sustainability and socioeconomic welfare. Despite the Lake Chad Basin Commission's adoption of the IWRM principles, the basin experiences a massive humanitarian crisis driven by the lake's shrinkage, the water shortage for food production, the rapid population growth, and the terrorist attacks perpetrated by Boko Haram. This study sought to assess the socioeconomic and demographic status of people living upstream of Lake Chad in order to understand the challenges associated with …

A Review Of Antecedent- And Consequence-Based Interventions For Vocal Stereotypy, Christine A. Roeper

USF Tampa Graduate Theses and Dissertations

The exact prevalence of vocal stereotypy within individuals diagnosed with ASD in currently unknown. In a 2011 study on symptoms of ASD by Mayes and Calhoun, 85% of parents reported their child engaged in repetitive, atypical speech or vocalizations. While there is a plethora of research on behavioral interventions to reduce levels of vocal stereotypy in individuals diagnosed with Autism Spectrum Disorder, at the time this review was written there is only one published review of the literature written by Lanovaz and Sladeczek in 2011. Therefore, the purpose of this paper is to extend and update the 2011 review conducted …

One News Event, Three Media Frames, Le Xin

USF Tampa Graduate Theses and Dissertations

As a protest movement that has attracted international attention, the 2019 Hong Kong protest has become the focus of media and public attention due to political issues involving China mainland and Hong Kong. The reporting process and framing of news media for news events is actually a process of selecting and reorganizing related events. The media of different countries also reported the 2019 Hong Kong Protest like this process. However, the reporting frameworks in different media organizations are also completely different because of the differences in the nature, positioning, and political factors of those media. Based on the framing theory, …

Strength Restoration Of Corrosion Damaged Piles Repaired With Carbon Fiber Reinforced Polymer Systems, Jethro Clarke

USF Tampa Graduate Theses and Dissertations

Of the 12,741 bridges accounted for by the Florida Department of Transportation (FDOT), approximately 50% were built between the 1950s and 1960s. During this period, bridges were typically constructed in coastal environments using pile bents. Now, the main threat to bridges in these environments is corrosion, which occurs in the splash zones of most bridge piles. These zones contain high concentrations of chlorides, oxygen and moisture, the corner stones of a highly corrosive environment. Corrosion compromises steel reinforcement in these areas leading to cracking, spalling and an inevitable loss of capacity.

In recent years, significant strides have been made in …

Assessing Many-Body Van Der Waals Contributions In Model Sorption Environments, Matthew K. Mostrom

USF Tampa Graduate Theses and Dissertations

The energy used in the separation and purification of small volatile atoms and compounds represents a sizablefraction of the world’s energy consumption as a whole 1 Noble gases in particular represent a unique challenge as their separation currently relies on distillation methods that work by virtue of small differences in the density of their pure phases. Highly porous Metal-Organic Materials (MOMs) offer a cheaper, more efficient alternative to cryogenic distillation, and studying their properties using various simulation methods has become an important and active area of research. The family of Potentials with “High Accuracy, Speed and Transferability” (PHAST) have been …

A Review Of Feedback Techniques Used To Improve Athletic Performance, Codye Mark Donovan Manning

USF Tampa Graduate Theses and Dissertations

Feedback is an important component to successful behavioral interventions. Regarding interventions to improve athletic performance, several studies have used different forms of feedback across multiple sports. This area paper examined the different types of feedback across studies on athletics, describing the forms of feedback and directions for future research highlighted among them. In particular, this paper described video feedback, verbal feedback, auditory feedback, and public posting.

Motivation To Volunteer, Lendi N. Joy

USF Tampa Graduate Theses and Dissertations

The rate of volunteering in the U.S. remains low in spite of the many positive benefits that volunteering yields. Prior research has suggested various theories to help explain motivation to volunteer. Nonetheless, none of the theories have been both comprehensive and specific enough to allow for their practical application in recruitment efforts or campaigns to increase motivations to volunteer. The purpose of the current study was to test a comprehensive model of volunteer motivation by integrating the Volunteering Functions Inventory into the Theory of Planned Behavior as behavioral and normative beliefs that influence attitudes and subjective norms. The hypothesized model …

Immune Modulation As A Therapeutic Target In An Α-Synuclein Model Of Parkinson’S Disease, Meena Subhashini Subbarayan

USF Tampa Graduate Theses and Dissertations

Parkinson’s disease (PD) is the second most common neurodegenerative disorder affecting about 1.5 million people in the United States with more than 60,000 people diagnosed each year. It is classically characterized by four major symptoms: tremor, postural instability, stiffness in joints, and slow movement (bradykinesia). Pathologically PD is characterized by up to 70% loss of dopaminergic neurons in substantia nigra pars compacta (SNpc) of midbrain and accumulation of presynaptic protein called α-synuclein (α-syn) within dopaminergic neurons that extend to the striatum. This disrupts the nigrostriatal pathway leading to the motor symptoms seen in PD patients. Microglia, the innate immune cells …

La Tierra Que Pisamos: El Tercer Espacio En La Narrativa De Jesús Carrasco, Christina Ahmed

USF Tampa Graduate Theses and Dissertations

Este estudio explora las diferentes manifestaciones del tercer espacio en la novela de Jesús Carrasco, La tierra que pisamos (2016), para mostrar cómo la narrativa es capaz de generar empatía en el lector. Un ejemplo de Historia alternativa, la novela narra la colonización de España por un Imperio imperialista. Los eventos se sitúan en un pueblo en Extremadura donde un indígena llamado Leva aparece en la finca de Eva, la esposa de un militar del Imperio. La interacción entre los dos personajes principales provoca un cambio en la mentalidad de Eva, ya que se hace consciente de cómo su país …

Analysis Of Computational Modeling Methods As Applied To Single-Crystal Organohalide Perovskites, Jon M. Bebeau

USF Tampa Graduate Theses and Dissertations

Perovskite, specifically MAPbI3, has exploded onto the electronic material forefront, with applications from photovoltaic to optical sensors. Still, there remain many unanswered questions about the electronic, structural and mechanical processes and properties of this perovskite. Computational software exists to model the electronic structure and material properties, to the nano scale, using density-functional theory. The goal of these models it to parallel the physical science of the substance in a computer simulation based on emerging mathematical models of the quantum mechanical behavior. In this study I review the historical use of perovskites in electronics, review the evolution of DFT algorithm developments …

Diagnosis Of Freeway Bottlenecks During The Mass Evacuation For Hurricane Irma On Florida's Turnpike Mainline, Brian Michael Staes

USF Tampa Graduate Theses and Dissertations

Prevailing traffic conditions were examined for a bottleneck that occurred on northbound SR-91 (Florida’s Mainline Turnpike) during the mass evacuation for Hurricane Irma in September 2017. Radar detector count, occupancy, and speed data polling at 1-minute intervals were collected from the Regional Integrated Transportation Information System (RITIS) and employed to identify the distinct periods one particular bottleneck was active at a service plaza along SR-91. With this rich data, three distinct periods were identified in which the bottleneck was active at a service plaza off-ramp, lasting a total of 27.5 hours during this colossal evacuation. To identify the activation time …

Bodily Harm: An Analysis Of The Phenomenological And Linguistic Aspects Of Harm And Trauma, Grant Samuel Peeler

USF Tampa Graduate Theses and Dissertations

This work seeks to explore the phenomenological experience of harm through an investigation of trauma and its existential features. Harm, despite its importance for many topics in both Political Science and Political Theory, is not often investigated as a subject in itself. By interrogating elements of Merleau-Ponty’s uniquely embodied philosophy, this work seeks to further our understanding of harm as a phenomenon which is both uniquely subjective and yet socially informed.

The text is split into two halves – with the first offering an exegesis of relevant sections of Merleau-Ponty’s Phenomenology of Perception, and the second engaging with contemporary secondary …

A Review Of American College Campus Tobacco Or Smoke Free Policies: A Case Study Of A Large Urban University, Sarah E. Powell

USF Tampa Graduate Theses and Dissertations

Objective: A year after a tobacco free policy was passed, the University of South Florida (USF) was interested in the overall policy opinions and efficacy. To assess this a project was completed that included a survey and geospatial data. The survey measured tobacco policy enforcement behavior and a geographic information system (GIS) mapped tobacco policy violation. This project introduces an evaluation process that can efficiently assess an institutions tobacco-free policy. Methods: Using a cross-sectional survey sent to students, faculty, and staff, understanding of policy and resources, tobacco use observations, stage of change regarding policy enforcement, self-efficacy to enforce, and perceived …

An Inferential Study Of The Potential Consumer Value Of Free Charging For Users Of Public Electric Vehicle Charging Infrastructure, Divyamitra Mishra

USF Tampa Graduate Theses and Dissertations

Although there is economic and marketing evidence of consumers assigning additional benefits to free products and bundles, there is limited research into the behavioral consequences of offering public electric vehicle charging for free. Previous exploratory research by Maness and Lin analyzed possible economic and environmental benefits from offering free public charging infrastructure and policy. Their work found that providing free public charging infrastructure could increase plug-in electric vehicle sales and cause decreased reliance on fossil fuels in the personal transportation sector. However, their study assumed the increased value which consumers would place on free charge events. This project proposes to …

New Mechanisms That Regulate Dna Double-Strand Break-Induced Gene Silencing And Genome Integrity, Dante Francis Deascanis

USF Tampa Graduate Theses and Dissertations

Proliferating cells are constantly threatened by genotoxic stressors that can potentially lead to genomic instability. Breaks in the DNA, namely double-strand breaks, are detrimental sources of damage that must be repaired to maintain genomic integrity and prevent potential tumorigenesis. Here we discuss a gene silencing mechanism flanking damaged chromatin. Gene silencing and transcriptional repression at damaged DNA are necessary to prevent potential genomic aberrations from occurring through conflicts with the DNA repair machinery. BMI1, a core polycomb protein in the polycomb repressive complex 1 (PRC1) has been known to play a role in gene silencing at damaged chromatin. However, the …

The West Knows Best: East Germans Left Behind After Unification, Arwen A. Puteri

USF Tampa Graduate Theses and Dissertations

The East-German euphoria of unification in 1989 and the subsequent transition from a communist to a market economy that had promised West German standards and prosperity in East Germany vanished rapidly. A hastily negotiated unification treaty and emerging West German dominance – in numbers and economic power – resulted in vast unemployment, bankruptcies, and the large-scale collapse of the East German economy. In addition, East-German culture, accomplishments, and experiences were not respected and valued in a unified country that was focused on Western values, languages, and ways of life. With nothing to offer, East Germans became hopeless and resentful and …

Physician Self-Efficacy And Risk-Taking Attitudes As Determinants Of Upcoding And Downcoding Errors: An Empirical Investigation, Samantha J. Champagnie

USF Tampa Graduate Theses and Dissertations

Physicians across the United States are burdened with the pressure of accurate coding while trying to maintain quality patient care. Despite the economic importance of coding accuracy, investigators have not reached consensus on the factors that contribute to coding errors. This study fills this gap by investigating physician characteristics that explain the variation in physician coding accuracy, specifically evaluation and management upcoding and downcoding errors. An electronic survey was distributed to 325 physicians that measured physicians’ attitudes towards risk and coding self-efficacy. Regression analysis found physicians with low self-efficacy had more conservative coding behaviors, resulting in higher incidences of downcoding. …