Digital Commons Network^™

Resource Recovery From Crew Metabolic Wastes In Lunar And Martian Habitats: Reuse Of Effluent From An Anaerobic Membrane Bioreactor Treating Fecal Organic Matter As Fertilizer Source For Plants, Alexandra A. Smith

USF Tampa Graduate Theses and Dissertations

As humans set their sights on exploration of the Moon and Mars human focused challenges like providing potable water, supplying nutritious food to the astronaut crew, and managing their waste present themselves. There are no readily available resources on the Moon and Mars, therefore nothing should be considered unusable including the organic wastes (i.e., feces and urine) produced by the crew. Fecal matter is not currently recycled and is treated as solid waste. After collection, it is discarded out of the International Space Station where it is incinerated upon re-entry. This approach will not work on the Moon’s surface. There …

“I Don't Know Where The Lesbians Are”: Exploring Lgbtq+ Women’S Experiences Of Place And Community, Ashley M. Green

USF Tampa Graduate Theses and Dissertations

This dissertation examines LGBTQ+ women’s experiences of place and community in Central Florida. Through the use of in-depth interviews and virtual ethnography, I begin to answer the following questions: 1. To what extent does geographic location contextualize how LGBTQ+ women experience place and community?, 2. How do LGBTQ+ women within a similar geographic location utilize virtual spaces for the purpose of building community?, and 3. How are the intersections of gender, race, and sexuality significant to LGBTQ+ women’s experiences of place and community? This project provides a glimpse into the phenomenon of consuming community, which speaks to the ways in …

Study On Versatile S(Vi) Reagents Towards Synthesis Of S(Iv) And S(Vi) Functional Groups, Shun Teng

USF Tampa Graduate Theses and Dissertations

This dissertation mainly covers the latest methodology development in the field of sulfur-containing functional groups in synthetic chemistry. There are two parts. The first part is the asymmetric synthesis of sulfoximines, sulfonimidamides, sulfonimidoyl fluorides, and sulfinamides enabled by a versatile enantiopure S(VI) reagent. The second part is the Grignard reagent-triggered divergent S-editing synthesis via a bench-stable S(VI) reagent.

In the first part, the asymmetric synthesis of sulfoximines, sulfonimidamides, sulfonimidoyl fluorides, and sulfinamides is reported. This report focuses on the development of a bifunctional S(VI) reagent and its utility in synthesis. It employed the enhanced stability of sulfonimidoyl fluorides and the …

Anaerobic Digestion Of Brewery Waste Including Spent Yeast And Hops, Dhanashree Rawalgaonkar

USF Tampa Graduate Theses and Dissertations

Florida is home to more than 300 craft breweries, that brew over a million barrels of beer annually. Brewing is an energy intensive process and produces large quantities of high strength waste including spent grains, yeast, hops, and high strength wastewater. Brewery wastewater, and spent yeast have high Chemical Oxygen Demand (COD) concentrations between 5000 mg/L – 10,000 mg/L, and 200,000 mg/L – 300,000 mg/L respectively. Brewery effluent wastewater is sent to Publicly Owned Treatment Works (POTWs) which implement high surcharges based on the strength of brewery effluent (COD concentration). While some of the spent yeast and hops can be …

Evaluating The Effects Of Academic And Social Breaks On Off-Task Behavior In A College Classroom, Allison K. Fisher

USF Tampa Graduate Theses and Dissertations

Educators and researchers aim to develop effective teaching practices to increase on-task behavior and decrease off-task behavior during class time to ensure positive outcomes for students. The types of off-task behavior observed in classrooms with high school and college populations have changed in recent years due to the prevalence of accessible technology. The purpose of this study was to evaluate the effects of social and academic breaks on off-task behavior in the college classroom. The social break allowed for a time for students to socialize and/or engage with a mobile device, and the academic break allowed for students to take …

Ice-Core Reveals Flavors Of Hydroclimate Extremes In The American Southwest, Laura Calabrò

USF Tampa Graduate Theses and Dissertations

A small number of caves and lava tubes worldwide host perennial ice deposits, which occur at elevations well below those of mountain glaciers and in areas outside the permafrost climatic belt, where no surface glaciation exists. These settings make any of the ice deposits in caves or lava tubes particularly susceptible to the current warming trend, leading to the imminent loss of some untapped cryospheric paleoenvironmental archives.

The present work is the result of a paleoclimate study based on ice deposits accumulated within lava tubes in El Malpais National Monument (ELMA, western New Mexico). The ice cores span from 7,000 …

The Impact Of Covid-19 On Service Access For Children And Adolescents With Intellectual And Developmental Disabilities Across Florida, Alyssa N. Hanley

USF Tampa Graduate Theses and Dissertations

In early 2020, the COVID-19 pandemic struck. Businesses worldwide closed to lessen the spread of the virus. Due to an increased need for specialized services compared to the general population, individuals with intellectual and developmental disabilities (I/DD) may have been disproportionately affected by COVID-19 shutdowns. Without access to schools and centers where services are provided, therapeutic progress was halted. Services, such as special education, occupational therapy, and physical therapy, were paused, impacting access and maintenance for individuals with I/DD. In addition, services that continued did so using modified delivery methods such as telehealth. To investigate the impact of the COVID-19 …

Environmental Chemical Analysis Method Optimization And Application To Northwest Cuban Marine Sediment, Thea R. Bartlett

USF Tampa Graduate Theses and Dissertations

A method for gas chromatography tandem mass spectrometry (GC-MS/MS) in selected reaction monitoring (SRM) mode has been optimized to quantify 250 compounds of a variety of compound classes such as polycyclic aromatic hydrocarbons (PAHs), oxidized PAHs, organochlorinated pesticides, polychlorinated biphenyls, biomarkers (hopanes, steranes, tri-aromatic steroids, and fecal sterols), aliphatic hydrocarbons, and plastic additives. This method was validated based on available QA/QC standards using several environmental samples, both sediment and biota, and standard reference materials. This contaminant-focused method can be used as a forensic geochemistry tool to evaluate oil contamination and other contaminant histories in future research studies. When applied to …

Examination Of Microplastics And Organic Contaminants In Tampa Bay’S Eastern Oyster (Crassostrea Virginica) Through Visual And Chemical Analysis, Andrea Murray

USF Tampa Graduate Theses and Dissertations

Microplastic pollution is an increasingly alarming concern with widespread global distribution in aquatic environments. Filter feeding organisms such as bivalves, have a heightened risk of microplastic ingestion through free floating particulates in the water. This can lead to bioaccumulation moving up through trophic levels to apex predators and humans. Spatial and temporal differences in microplastic abundance were evaluated in the Eastern Oyster, Crassostrea virginica, at six sites within Tampa Bay. Oyster tissue was digested using 30% hydrogen peroxide (H2O2) and microplastics were quantified using Nile Red dye and fluorescent particle excitement. A total of 3025 microplastics were found throughout six …

“I’M Still Suffering”: Mental Health Care Among Central African Refugee Populations In The Tampa Bay Area, C. Danee Ruszczyk

USF Tampa Graduate Theses and Dissertations

An estimated 500 Central African refugee families have been resettled in the Tampa Bay Area since 2002 (RPC, 2022). The cycles of trauma that they have endured place them in vulnerable positions regarding their mental health. Struggling to exist within underfunded social programs that are rigid in their expectations and with the current system of reactive care vs preventative care, the refugees in Tampa are put in a difficult situation of navigating their own health and wellbeing in lieu of having the full support of the United States government and their community. I will discuss how these refugees experience and …

Assessment Of Iso Heart Rate Method To Estimate Metabolic Rate, Karl Williams

USF Tampa Graduate Theses and Dissertations

Thermal equilibrium is primarily maintained by the body’s ability to dissipate internal heat generated during muscle contraction. A number of methods have been used to quantify this thermal burden such as charts and observation of workplace activities and behavior, however these have varying levels of validity. ISO 8996 defines a more accurate method of metabolic rate estimation that uses heart rate and maximal work capacity (MWC); however this requires the use of laboratory settings and equipment that are rarely available in the field. Equations such as the ACSM metabolic equation for the total energy expenditure of walking, hereafter referred to …

Stable Isotope Analysis Of Doryteuthis (Amerigo) Pealeii Eye Lenses To Determine Migratory Patterns In The Eastern Gulf Of Mexico Using Statoliths For Age Determination, Hannah M. Schwaiger

USF Tampa Graduate Theses and Dissertations

Doryteuthis (Amerigo) pealeii is a common fisheries squid that occurs in the Gulf of Mexico (GoM) and along the east coast of the United States. These squid are an important link in the food web, linking higher and lower trophic positions (Madsen et al., 2007), and they are also used for human consumption. The migration patterns of D. pealeii populations in the northwestern North Atlantic have been thoroughly studied when compared to those in the GoM. This research aims to combine statolith aging and stable isotope analysis to enhance the understanding of D. pealeii migration patterns throughout their short, sub-annual …

Autonomous Professional Learning Through Practitioner Inquiry: A Study Of Growth Plan System Experiences, Daina Kelly Gaputis

USF Tampa Graduate Theses and Dissertations

The need for quality science education has long been established, but despite reform after reform, it remains a current concern. What we know as good teaching is not happening, perhaps because there is an increase in science teachers using alternative certification programs to enter the field. This lack of formal training causes teachers to have a reliance on professional learning opportunities to learn about reform-based science education. Unfortunately, traditional forms of professional learning are often inadequate, so newer professional learning designs have been established. Some of these newer designs, such as practitioner inquiry, offer teachers autonomy over how they assess …

Synthesis, Characterization, And Separation Of Loaded Liposomes For Drug Delivery, Sandra Khalife

USF Tampa Graduate Theses and Dissertations

Liposomes are viable candidates for drug delivery vehicles due to their ability to protect loaded compounds, dampen side effects of drugs, and be delivered to target sites in the body. The amphipathic nature of these lipid vesicles makes them very customizable through careful selection of bilayer and aqueous core components as well as synthetic and downsizing methods. However, synthetic methods may result in unencapsulated compounds remaining present alongside loaded liposomes, which require removal before the liposome suspension can be used.

This work explores the use of model DOPC as well as DOPC and CHOL liposomes and the methods that were …

Characteristics And Hydraulic Behavior Of Adsorptive Media For Use In Permeable Reactive Barriers, Shelby Rocha

USF Tampa Graduate Theses and Dissertations

The Cargill ditch is located on the property of Se7en Wetlands, a 1600-ac treatment wetland system in Lakeland, Polk County, Florida. The Se7en Wetlands property was previously utilized for phosphate mining prior to the construction of the system. Nonpoint nutrient sources derived from remnants of abandoned phosphate mines – known as “legacy phosphorus” – become mobilized by stormwater runoff and impair surface water bodies by promoting harmful algal blooms (HABs). Thus, the Cargill ditch likely conveys nutrient rich flow resulting from legacy phosphorus and is thought to be one contributing factor in the occurrence of HABs within the treatment wetland …

An Empirical Investigation Of Network Topology On Majority Illusion, Behavior Adoption, And Polarization, Sreeja Sreekantan Nair

USF Tampa Graduate Theses and Dissertations

Social influence plays a significant role in shaping opinions and behaviors both online and inthe physical world. The ways in which we interact with others and the information we receive can significantly influence our beliefs and attitudes towards different issues. While online social media provide platforms for such interactions, the underlying network structure can impact various social influence phenomena, including majority illusion, behavior adoption, and polarization.

This dissertation examines the role of network topology in three social influence processes:majority illusion, behavior adoption, and polarization. The majority illusion refers to a perception bias that occurs when individuals believe that an opinion …

Evaluation Of Two Methods To Estimate Wet Bulb Globe Temperature From Heat Index, Stephi Pofanl

USF Tampa Graduate Theses and Dissertations

The Wet bulb globe temperature (WBGT) is a common method to evaluate environmental factors that contribute to occupational heat stress. The Heat Index (HI) is readily available as an alternative to exposure methods. They both assess the most important contributors that are air temperature and humidity. WBGT also includes radiant heat and air motion. To account for radiant heat and/or air motion, some investigators have suggested adjustments to HI. The purpose of this study is to explore two methods to estimate the usefulness of WBGT from HI.

WBGT data were collected in a variety of locations that included direct sun …

Investigation Of Challenging Transformations In Gold Catalysis, Qi Tang

USF Tampa Graduate Theses and Dissertations

This dissertation mainly contains three parts: 1) Divergent gold catalysis for alkyne trifunctionalization, encompassing three distinct modes to achieve the simultaneous formation of C-N, C-O, and C-C bonds in a single step 2) the study and development of a new method to synthesize azaborine derivatives; and 3) the construction of benzotriazole boranes (BTAB) as stable four-coordinate N-B heterocycles through gold-catalyzed alkyne hydroboration.

In the first part, alkyne trifunctionalization via divergent gold catalysis will be introduced. This novel approach involves a sequence of reactions that combine gold π-activation, vinyl gold nucleophilic addition, and gold (III) reductive elimination. By utilizing this methodology, …

Socio-Emotional Effects Of Rejection: An Experience-Sampling Examination, Gabriella Silva

USF Tampa Graduate Theses and Dissertations

Rejection is a detrimental experience that directly threatens people’s fundamental need for social acceptance and connection. Rejection is particularly distressing for people with elevated social anxiety, as it is their core fear. Yet, very few studies have examined the impact of daily rejection in the context of social anxiety. The present research examined the socioemotional effects of daily feelings of rejection in the context of social anxiety across two experience-sampling studies. Study 1 was a 2-week daily diary study with community adults and Study 2 was a 4-week ecological momentary assessment (EMA) study with a clinical sample of adults with …

A Study Of Relationship Between Exertional Heat Illness And Heat Stress Levels, Rolando J. Fargas-Martinez

USF Tampa Graduate Theses and Dissertations

Introduction: Heat stress is clearly associated exertional heat illnesses (EHI) in workers in a number of studies. With expected increase in extreme thermal changes, an increase understanding the effects of heat stress conditions is necessary. The purpose of this study was to compare heat stress levels in a manufacturing plant to determine whether a relationship exists between heat stress level relative to the occupational exposure limit and exertional heat illness incidents.Methods: OSHA recordable heat illness cases (n=35) were collected over a three year period. Over the same period, hourly ambient Heat Index data was collected. For this manufacturing plant, heat …

Effect Of Dual Inhibition Of Atypical Pkc Signaling And Pi3k/Akt Signaling On Cell Viability And Apoptosis In Clear Cell Renal Cell Carcinoma (Ccrcc)., Khandker M. Khalid

USF Tampa Graduate Theses and Dissertations

Renal Cell Carcinoma (RCC) is the most common type of kidney cancer (85%); 75% of the cases involve conventional clear cell RCC (ccRCC). The choice of treatments recommended for clear cell carcinoma and non-clear cell carcinoma include partial nephrectomy (Stage I), radical nephrectomy (Stages II and III), and chemotherapy (stage IV). Phosphatidylinositol-3-kinase (PI3K) inhibitors can be a viable candidate in the chemotherapy of ccRCC because the PI3K/Akt pathway is frequently activated in RCC. Hence, PI3K inhibitors like Alpelisib (BYL719) can be chosen as a treatment. In addition, aPKCs (PKC-ί and PKC ζ) are overexpressed in most cancer cells, and they …

Improving The Subjective Well-Being Of Autistic Youth Utilizing A Positive Psychology Intervention, Nicolette Bauermeister

USF Tampa Graduate Theses and Dissertations

This study utilized a single-case multiple-baseline design to analyze the effects of a ten-week multi-component positive psychology intervention, the Well-Being Promotion Program, on the subjective well-being of Autistic youth. This thesis addressed a gap in the literature regarding the effectiveness of positive psychology interventions when administered to Autistic middle schoolers. Three Autistic middle schoolers participated in this single-case design study. Dynamic decision-making was used to stagger intervention implementation across the three participants. Life satisfaction and positive/negative affect data were collected via a Qualtrics survey that was administered twice per week. Through visual analysis and Baseline Corrected Tau calculations, it was …

Institutional And Individual Approaches To Change In Undergraduate Stem Education: Two Framework Analyses, Stephanie B. Feola

USF Tampa Graduate Theses and Dissertations

The overarching goal of this dissertation is to examine institutional change initiatives in STEM and to understand the impact of engaging with a specific change strategy on a biochemistry educator’s instructional practice. Institutional change initiatives involve executing an intentional strategy to influence teaching practices within a specific institution. This research investigates NSF-funded change initiatives at three public research universities that were focused on encouraging the adoption of evidenced-based instructional practices (EBIPs) by STEM faculty. As part of an effort to understand how the three institutions approached this task, framework analysis was performed using the initiative’s annual reports to NSF. Further …

Metachronal Locomotion: Swimming, Scaling, And Schooling, Kuvvat Garayev

USF Tampa Graduate Theses and Dissertations

This dissertation deals with one type of underwater locomotion called metachronal swimming in which the organism sequentially beats its multiple appendages allowing phase lag between adjacent neighbors. Metachronally swimming species are widespread and include copepods, shrimp, ctenophores, and tomopterid worms to name few. First, using the high-speed recording and planar particle image velocimetry (PIV) measurement, I report on kinematics of fast metachronal swimmer and constructive vortex interactions among its appendages and discuss its implications for improved performance regarding the swimming. Second, I show how hydrodynamic performance of all metachronal swimmers (paramecia, copepods, tomopterid worms, krill etc.) can be scaled by …

Threats To School Safety: Examining Levels Of Community Violence And Its Relation To School-Related Threats, Dorie Ross

USF Tampa Graduate Theses and Dissertations

Despite significant media attention provided to school-based acts of violence, these tragic incidents are relatively rare across school environments, leading to increasing challenges in identifying students who may pose a threat. Previous approaches to school discipline, including policies such as zero tolerance, resulted in significant racial disparities among students who received disciplinary consequences inconsistent with the severity of their behaviors or threats. Alternatively, a relatively recent approach that emerged following a series of school shootings in the 1990s was school threat assessment, which focuses on prevention rather than prediction. While it is important to determine students who may pose a …

Development Of A Ddpcr Multiplex To Measure The Immune Response To Borrelia Burgdorferi., Kailey Marie Mccain

USF Tampa Graduate Theses and Dissertations

Zoonotic diseases account for a significant proportion of emerging infectious diseases (EIDs), with their dynamics being heavily influenced by the environment. While the effects of the environment on population-level disease dynamics have been extensively studied, there is limited research investigating the impact of the environment on individual-level disease susceptibility and transmission. This study aims to fill this gap by creating a tool to examine the variation in immune response to Borrelia burgdorferi, the causative agent of Lyme Disease, in two competent host species, Peromyscus leucopus and Peromyscus maniculatus. Two triplex droplet digital polymerase chain reaction (ddPCR) assays were developed to …

Gold-Catalyzed Diyne-Ene Cyclization: Synthesis Of Hetero Polyaromatic Hydrocarbons And 1,2-Dihydropyridines, Jingwen Wei

USF Tampa Graduate Theses and Dissertations

Homogeneous gold catalysts are known as a powerful tool for selectively activating alkynes and are well-developed in the construction of C-C, C-N, and C-O bonds to form complex compounds that are widely used in pharmaceuticals, industries, agriculture, etc. The investigation of gold(I) catalysis on conjugated diyne (compounds having two acetylene groups) enriches the complexity of the bond construction and allows the building of interesting skeletons in organic synthesis. One typical kind of substrate, diyne-ene, has both a conjugated diyne part and a 1,6- enyne part. We developed a new methodology to allow its divergent synthesis to heterocycles.

This dissertation mainly …

Academic Procrastination Among Chinese International Undergraduate Students In The United States, Yunlu Xiang

USF Tampa Graduate Theses and Dissertations

This research aimed to explore academic procrastination among Chinese internationalstudents, using NVivo 12 to analyze data gathered through interviews with six participants. The study identified both internal and external factors contributing to academic procrastination, with social networking and software being the most significant external factors and disinterest and avoidance being the most significant internal factors. The participants did not identify the COVID-19 pandemic as a significant factor in academic procrastination. The study analyzed gender differences in academic procrastination among Chinese students. The pandemic had different effects on men and women, with men downplaying the concept of time and women experiencing …

Applications Of Seismic And Geodetic Data To Earthquake Hazard Research, Mahsa Afra

USF Tampa Graduate Theses and Dissertations

Being a part of a seismically active zone, including large and crowded cities such asTehran, Qazvin and Semnan, Central Alborz experiences many local earthquakes. Knowl- edge of crustal velocity structure in this area is thus necessary considering its economical and political importance, a large concentration of population, and relatively poor construc- tion practice which increases the earthquake risks in this region. In second chapter of this thesis, we aim at obtaining the 3D crustal velocity structure of the Central Alborz region in northern Iran using local earthquake tomography. We also validate anomalies inferred from our velocity model using an independent …

The Impacts Of Disability Policy And Its Implementation On Deaf University Students: An Applied Anthropological Approach, Tailyn Marie Osorio

USF Tampa Graduate Theses and Dissertations

The Americans with Disabilities Act of 1990 (ADA) has provided legal requirement for universities to provide accommodations for all disabled students, including deaf students. The ADA is intentionally vague to allow flexibility for how institutions implement accommodations provisions. This leads to high variability across universities. Using ethnographic data from policy analysis, semi-structured interviews and focus groups with accommodations coordinators and deaf students from a large-public university, this applied anthropological study aims to investigate the impacts of policy and policy practices on the experiences of deaf students while proposing interventions informed by the coordinators and deaf students themselves.

This study is …