Digital Commons Network^™

Distribution Of Polybrominated Diphenyl Ethers Among Demographic Categories, Giorvanni Merilis

USF Tampa Graduate Theses and Dissertations

Polybrominated Diphenyl Ethers (PBDEs) are flame retardants widely used within the United States in various products such as plastics, electronics, textiles and furniture. With an increase in production and usage, PBDEs have recently emerged as a contaminant of concern. Due to their chemical structure, PBDEs have the propensity to bioaccumulate in mammals. In fact, elevated PBDE concentrations have been recorded in human breast milk. Due to the potential widespread exposure to PBDEs, this study investigates human blood concentrations of PBDEs generated through the 2003-2004 National Health and Nutrition Examination Survey. Through the use of statistical modeling, a comparison of mean …

Osteopontin Plays A Pivotal Role In In Increasing Severity Of Respiratory Syncytial Virus Infection, Viviana Sampayo-Escobar

USF Tampa Graduate Theses and Dissertations

The molecular mechanisms underlying susceptibility to severe respiratory syncytial virus (RSV) infection remain poorly understood. Herein, we report on the role of osteopontin (OPN) in regulation of RSV infection in human epithelial cells and how interleukin-1 beta (IL-1β), a cytokine secreted soon after RSV infection, when persistently expressed can induce OPN expression leading to increased viral infection. We first compared OPN expression in two human epithelial cell lines: HEK-293 and HEp-2. In contrast to HEp-2, HEK-293 expresses low levels of pro-caspase-1 resulting in decreased IL-1β expression in response to RSV infection. We found a correlation between low IL-1β levels and …

Advanced Treatment Technologies For Mitigation Of Nitrogen And Off-Flavor Compounds In Onsite Wastewater Treatment And Recirculating Aquaculture Systems, Laura C. Rodriguez-Gonzalez

USF Tampa Graduate Theses and Dissertations

Non-point sources (NPS) of pollution are non-discernable, diffuse sources of pollution that are often difficult to localize and in turn mitigate. NPS can include stormwater runoff, agricultural/aquaculture wastes and wastes from small decentralized wastewater treatment systems, such as conventional septic systems. The mitigation of these NPS is imperative to reduce their potential detrimental effects on the water environment. This dissertation addresses novel treatment technologies for the mitigation of nutrients, particularly nitrogen, in Recirculating Aquaculture Systems (RAS) and onsite wastewater treatment systems (OWTS). The removal of trace organics limiting RAS production and water reuse were also investigated.

The first question this …

It’S Not All Sunflowers And Roses At Home: A Narrative Inquiry Of At-Risk Girls And Their Perceptions Of Their Educational Experiences, Jessica Aggeles Curtis

USF Tampa Graduate Theses and Dissertations

The population of girls being incarcerated continues to grow amid the decline of boy offenders. While society has seen an increase in violent offenses perpetrated by these girls, the majority are still detained on status offenses or for non-violent crimes. For many girls, school is a place to seek solace and safety. Yet, for a growing population of girls, the bond they once shared with school is disintegrating. This disconnect has proven to be a critical turning point in their lives. The purpose of this study is to give girls who have been removed from the general education setting a …

Chemical Investigations Of Fungal Natural Products For Drug Discovery, Danielle H. Demers

USF Tampa Graduate Theses and Dissertations

Natural products have, historically, played an important role in drug discovery. Nevertheless, drug resistance, pathogen evolution, and global climate change threaten human health and nearly all current anti-infective treatments on the market today. It is undeniable that new drug discovery efforts are needed with increasing urgency.

Bolstered by a rich history of discovering treatments in the world around us, natural products chemists continue to look to the environment with increasing understanding and emerging technologies that allow efficient, effective isolation of new chemical entities. This thesis will describe one such endeavor.

Focusing on fungal natural products, herein is described the isolation …

Problematic Participation And Educational Dilemmas: Ethnography Of The Educational Experiences Of Black Male Youth In Hillsborough County, Florida, Deneia Y. Fairweather

USF Tampa Graduate Theses and Dissertations

In the social sciences, research on black male youth (BMY) experiences in traditional academic settings has been limited to their failure to achieve due to their perceived dysfunctional family structure, gender and ethnic identity, social class, and social structural constraints. Characterized by the anthropological investigation into youth cultural, Legitimate Peripheral Participation (LPP) framework, a theory of practice that includes an alternative framework of learning, and a mixed method approach with an emphasis on capturing the youth perspective through a PhotoVoice process, this research captures a dimension of BMY educational experiences by describing how exclusion from traditional academic settings is produced. …

A Program Evaluation Of A Worksite Wellness Initiative For Weight Loss, Nicholas Martinez

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to conduct a program evaluation of ACME’s worksite weight loss initiative and collect evidence relative to the efficacy of the program. An anonymous online survey was administered to participants of the weight loss initiative. The survey was designed to gather information relative to the research questions, which explored the initiative’s barriers to participation, alignment of initiative with the goals of participants, utilization of initiative resources, overall strengths, weaknesses, and areas of improvement for the weight loss initiative, as well as the respondents’ general profile for the six dimensions of wellness. Reporting of data included …

An Exploratory Study Of Macro-Social Correlates Of Online Property Crime, Hyojong Song

USF Tampa Graduate Theses and Dissertations

Despite the recent decreasing trend of most traditional types of crime, online property crime (OPC), referring to crime committed online with a financial orientation such as online frauds, scams, and phishing, continues to increase. According to the Internet Crime Complaint Center, the number of reported complaints about OPC have increased by approximately sixteen fold from 16,838 cases in 2000 to 288,012 cases in 2015, and referred financial losses have also increased about sixty times from $17.8 million in 2001 to $1 billion in 2015. The increase in OPC might be directly related to advanced online accessibility due to the accelerated …

Health Literacy, Depression, Anxiety, And Posttraumatic Stress Disorder As Predictors Of Biological Markers Of Immune Functioning In Youth And Young Adults With Hiv, Courtney A. Lynn

USF Tampa Graduate Theses and Dissertations

Human immunodeficiency virus (HIV) is a virus that affects the body’s immune system (Centers for Disease Control [CDC], 2016a). HIV is a worldwide epidemic and disproportionately impacts youth in the United States. Youth living with HIV (YLWH) face significant mental health problems, namely depression, anxiety, and posttraumatic stress disorder (PTSD) with rates of these disorders discrepant from those in the general population. In addition to psychological difficulties, health literacy is another factor that influences individuals with HIV and is a priority of research with adolescents (Kalichman et al., 2000; Manganello, 2008). The National HIV/AIDS Strategy: Update 2020 (White House Office …

Role Of Amylase In Ovarian Cancer, Mai Mohamed

USF Tampa Graduate Theses and Dissertations

Ovarian cancer (OC) accounts for 4% of all cancer cases and 4.2% of all cancer deaths worldwide. OC is the most lethal gynecological cancer because it lacks early disease symptoms and does not have a specific diagnostic marker. As a result, more than 70% of OC patients are diagnosed in later stages when the disease has already metastasized and the 5-year survival rate has decreased to less than 20% compared with approximately 90% survival for women diagnosed with early stage disease. Therefore, I initiated my studies with a computational analysis of the 27 most commonly reported literature-derived ovarian cancer (LDOC) …

Bisphosphonate Functionalized Gold Nanoparticles For The Study And Treatment Of Osteoporotic Disease, Christopher Conners

USF Tampa Graduate Theses and Dissertations

The use of nanoparticles for disease treatment is an increasingly popular area of research. The potential for multi-functionality allows nanoparticles to be used as transport and delivery vehicles for drugs and as diagnostic aides, among other applications, to address the unmet needs of many disease treatments. One such class of disease is osteoporosis including severe disorders, like Paget’s disease, Osteogenesis Imperfecta and Legg Calve Perthes disease. In this dissertation, we discuss a nanoparticle system consisting of gold nanoparticles surface functionalized with primary amine bisphosphonates, which is a classification of pharmaceuticals that is common in the treatment of osteoporosis. Functionalized nanoparticles …

A Landscape Of Thermal Inequity: Social Vulnerability To Urban Heat In U.S. Cities, Bruce Coffyn Mitchell

USF Tampa Graduate Theses and Dissertations

A combination of the urban heat island effect and a rising temperature baseline resulting from global climate change inequitably impacts socially vulnerable populations residing in urban areas. This dissertation examines distributional inequity of exposure to urban heat by socially disadvantaged groups and minorities in the context of climate justice. Using Cutter’s hazards-of-place model, variables indicative of social vulnerability and biophysical vulnerability are statistically tested for their associations. Biophysical vulnerability is conceptualized utilizing a urban heat risk index calculated from summer 2010 LANDSAT imagery to measure land surface temperature , structural density through the normalized difference built-up index, and vegetation abundance …

The Development And Validation Of The Physical Appearance Comparison Scale-3 (Pacs-3), Lauren M. Schaefer

USF Tampa Graduate Theses and Dissertations

Both theory and research implicate appearance comparison processes in the development of body image disturbance and disordered eating. Although several measures of appearance comparison exist, each has significant limitations. The Physical Appearance Comparison Scale-Revised (PACS-R) and its earlier versions are measures designed to assess the frequency of appearance comparisons among men and women. In the current study, the PACS-R was revised to (a) examine comparisons of weight/shape, muscularity, and overall physical appearance, (b) include items to assess comparisons with distal targets, (c) provide an assessment of upward versus downward comparisons, and (d) provide an assessment of the acute emotional impact …

Reappropriating Public Space In Nanchang, China: A Study Of Informal Street Vendors, Bryan C. Winter

USF Tampa Graduate Theses and Dissertations

Since China's shift to market socialism, many marginalized by this process work as informal street vendors where they reappropriate public space in order to survive―a practice at odds with urban authorities' modernizing agenda. In relation to these competing logics concerning public space's use value versus its exchange value, this dissertation examines the practices, experiences, and agency of informal street vendors working in Sanjingwuwei, an ordinary, yet rapidly gentrifying, neighborhood of Nanchang, capital and largest city of southeastern China's Jiangxi Province. After describing the growth of an informal economy in modern China and providing a history of street vending, I describe …

Learning Style Patterns Among Special Needs Adult Students At King Saud University, Abdulrahman Alshuaibi

USF Tampa Graduate Theses and Dissertations

Few studies of learning styles among adults with special needs exist worldwide. Even though there are large numbers of adults with special needs, this population in university education has been largely ignored in educational research. Therefore, this study aimed to gather and analyze learning styles of adult special needs students and to provide data for researchers interested in the fields of learning styles, adult education, and special education. This study examined the learning style patterns among special needs adult students at King Saud University as measured by the dimensions of the Index of Learning Styles, which include active/reflective, sensing/intuitive, …

Identifying Nodes Of Transmission In Disease Diffusion Through Social Media, David Sebastian Lamb

USF Tampa Graduate Theses and Dissertations

The spread of infectious diseases can be described in terms of three interrelated components: interaction, movement, and scale. Transmission between individuals requires some form of interaction, which is dependent on the pathogen, to occur. Diseases spread through the movement of their hosts; they spread across many spatial scales from local neighborhoods to countries, or temporal scales from days to years, or periodic intervals. Prior research into the spread of disease have examined diffusion processes retrospectively at regional or country levels, or developed differential equation or simulation models of the dynamics of disease transmission. While some of the more recent models …

Examining Forty Years Of The Social Organization Of Feminisms: Ethnography Of Two Women’S Bookstores In The Us South, Mary Catherine Whitlock

USF Tampa Graduate Theses and Dissertations

At the height of their popularity in the 1990s, there were 140 feminist bookstores in the US and Canada (Onosaka 2006). Today, in 2017, there are thirteen left. Feminist bookstores began opening in the 1970s promoting ideas about lesbian separatism, woman only spaces, and nurturing a feminist community. Although many functioned as for-profit stores, many also operated community centers and non-profit organizations. Feminist bookstores provide an excellent site for scholars view decades of social movement organizing merging theory, practice, activism, and academics. As a social movement organization, feminist bookstores as are the quintessential node of academia and activism. Of the …

How Teachers’ Beliefs About Climate Change Influence Their Instruction, Student Understanding, And Willingness To Take Action., Molly Trendell Nation

USF Tampa Graduate Theses and Dissertations

Climate change science is complex and controversial in nature, yet seen by educators and policy makers as an important topic to be taught within secondary science education. This is becoming increasingly evident with the inclusion of climate change into the Next Generation Science Standards (NGSS) for Earth and Space Sciences as well as Life Science courses (NGSS, 2013). An overwhelming amount of information is available to students; however, it is often misrepresented, politically inflated and falsified, and littered with misconceptions (Dawson & Carson, 2014; Gayford, 2002). It is critical to engage students in discourse that challenges them ethically in order …

Age Of Alcohol Initiation And Reward Processes In A Current Alcohol Drinking Sample, Claire M. Gorey

USF Tampa Graduate Theses and Dissertations

Earlier ages of alcohol initiation have been associated with an increased vulnerability for Alcohol Use Disorder and general risk taking behaviors beyond genetic influence. Reward processes, including reward anticipation (pleasure before receiving alcohol/general reward), reward learning (how quickly one pairs a stimulus with alcohol/general reward), and reward consummation (pleasure when receiving alcohol/general reward), have been implicated as potential mechanisms accounting for this vulnerability. However, no careful bio-behavioral research has been conducted on the effect of age of alcohol initiation on general and alcohol-related reward processes. Using Event Related Potentials (ERPs), the current study addressed this gap in a sample of …

Structural Analysis Of Poloidal And Toroidal Plasmons And Fields Of Multilayer Nanorings, Kumar Vijay Garapati

USF Tampa Graduate Theses and Dissertations

Multilayered metallo-dielectric nanoparticles are increasingly considered in various applications to control the spatial and temporal behavior of electromagnetic fields. In particular, the surface mode excitation by photons or electrons in metal nanorings finds significant applications because of the implied field distribution and electromagnetic energy confinement. However, most solid nanorings that are multilayered and/or embedded in a medium have non-simply connected geometry resulting in surface modes which are not linearly independent. That is, unlike particle plasmon eigenmodes in other geometries, the amplitudes of the eigenmodes of tori exhibit a distinct forward and backward coupling. We investigate the surface modes of such …

Countering The Questionable Actions Of The Cpd And Fec, Brian C. Cole

USF Tampa Graduate Theses and Dissertations

For his study, the author determines whether the Commission on Presidential Debates (CPD) and the Federal Elections Commission (FEC) are sovereign entities, or if they are pawns of the Democratic and Republican parties (Political Duopoly) aimed to prevent smaller candidates from participating in the CPD’s Presidential Debates.

The author’s rationale for his research is based on the fact that, despite a large majority of American voters want to hear other voices in the CPD debates, the CPD has not allowed other voices to participate in the debates since 1992, through use of the CPD’s fifteen-percent support requirement. Every time an …

Using Computer-Assisted Instruction To Decrease Transition Times For Students With Autism Spectrum Disorder, Kristina A. Bewley

USF Tampa Graduate Theses and Dissertations

Transitions within the school setting have been a challenge for school staff working with students with autism spectrum disorder (ASD). Teachers and students lose valuable academic time when the procedures in place are not working to create a quick transition - decreasing problem behavior, and increasing learning time. Students with ASD typically have a difficult time transitioning frequently throughout a school day, and problem behavior can be more apparent during this time. Hine, Ardoin, and Foster (2015) found that a computer-assisted instruction (CAI) based intervention was successful in decreasing classroom transition times for students in general education. The purpose of …

Tensions Between Democracy And Expertise In The Florida Keys, Elizabeth A. Loyer

USF Tampa Graduate Theses and Dissertations

The proposed release of genetically modified mosquitoes (GMM) in the Florida Keys to combat the spread of diseases such as Zika prompted heated local debate, turning a seemingly routine mosquito control policy into a public scientific controversy. Arguments about the GMM derive from inventional commonplaces where the historical conflict between democratic systems of civic deliberation and the epistemic authority of expertise is instantiated. This project analyzes the topoi that Keys participants gather around to generate their argumentative positions as published in public, local print and digital news articles, blog posts, and letters to the editor between 2011 and 2016. Investigating …

Space-Time Transportation System Modelling: From Traveler’S Characteristics To The Network Design Problem, Mohsen Parsafard

USF Tampa Graduate Theses and Dissertations

Traditional network design problems only consider the long-term stationary travel patterns (e.g., fixed OD demand) and short-term variations of human mobility are ignored. This study aims to integrate human mobility characteristics and travel patterns into network design problems using a space-time network structure. Emerging technologies such as location-based social network platforms provide a unique opportunity for understanding human mobility patterns that can lead to advanced modeling techniques. To reach our goal, at first multimodal network design problems are investigated by considering safety and flow interactions between different modes of transport. We develop a network reconstruction method to expand a single-modal …

Comparative Analysis Of Tag Estimation Algorithms On Rfid Epc Gen-2 Performance, Arundhoti Ferdous

USF Tampa Graduate Theses and Dissertations

In a passive radio-frequency identification (RFID) system the reader communicates with the tags using the EPC Global UHF Class 1 Generation 2 (EPC Gen-2) protocol with dynamic framed slotted ALOHA. Due to the unique challenges presented by a low-power, random link, the channel efficiency of even the most modern passive RFID system is less than 40%. Hence, a variety of methods have been proposed to estimate the number of tags in the environment and set the optimal frame size. Some of the algorithms in the literature even claim system efficiency beyond 90%. However, these algorithms require fundamental changes to the …

School Shootings In The United States From 1997 To 2012: A Content Analysis Of Media Coverage, Victoria N. Iannuzzi

USF Tampa Graduate Theses and Dissertations

This study is a content analysis of news articles of school shooting incidents that occurred within the United States between 1997 and 2012. This paper was designed to (a) address the current profile of school shooting offenders and offenses, (b) assess a proposed typology of school shootings, (c) consider common case processing characteristics for offenders of school shootings incidents, and (d) address the potential for offender and offense characteristics to affect the amount of media coverage an incident receives. The database of “Major School Shootings in the United States Since 1997” by the Brady Campaign to Prevent Gun Violence was …

Black Girl Magic?: Negotiating Emotions And Success In College Bridge Programs, Olivia Ann Johnson

USF Tampa Graduate Theses and Dissertations

Using ethnographic observations and in-depth interviews, this project explores the extent to which race, class, and gender shape the socialization that Black women receive about their emotions and attitudes in a college bridge program. It unpacks the ways that dominant emotion cultures can inform the emotional socialization practices of a college bridge program in ways that resist and reproduce larger cultural narratives about Black women. To operationalize this emotional socialization, I introduce a concept called emotional respectability, which suggests that emotional reactions and demeanor must always align with the larger emotion cultures and goals of institutions such as family and …

A Qualitative Content Analysis Of Early Algebra Education Ios Apps For Primary Children, Lissa S. Ledbetter

USF Tampa Graduate Theses and Dissertations

Educational software applications (apps) on multi-touch, mobile devices provide a promising space to help learners work toward long-term educational goals, like learning with understanding (Bransford, Brown, & Cocking, 2000). Such goals are particularly relevant in supporting a learner’s efforts to become more mathematically literate. Yet, a number of current apps do not appear to be living up to this potential. As such, this study drew upon the theoretical framework of Learning Science and the conceptual framework of TPACK theory (Mishra & Koehler, 2006) to define curricular characteristics that ideally support primary children’s potential to learn early algebra concepts with understanding, …

“You Know Who I Am, Don’T You? I’M The One They’Re Writing About In The Newspapers And On Tv”, Casey Killen Crane

USF Tampa Graduate Theses and Dissertations

News media play a key role in U.S. society, helping to inform members of the public as gatherers and reporters of information, as well as by serving as government watchdogs. In the ongoing search for and reporting of information, media professionals must be aware of how they report on crime by being cognizant of how they represent killers, victims, and their families, and by being aware of how they represent any gratifications those groups may receive from the media coverage. This study considers the interactions between serial killer Dennis Rader, investigators and media organizations, and how some of these groups …

Carbon And Nutrient Balances In Microalgal Bioenergy System, Eunyoung Lee

USF Tampa Graduate Theses and Dissertations

This research investigated life cycle environmental impacts and benefits of an integrated microalgae system with wastewater treatment system using an integrated process modeling approach combined with experimentation. The overall goal of this research is to understand energy, carbon and nutrient balances in the integrated system and to evaluate the environmental impacts and benefits of the integrated system from a carbon, nutrient, and energy perspective. In this study, four major research tasks were designed to contribute to a comprehensive understanding of the environmental and economic sustainability of the integrated system, which included development of an integrated co-limitation kinetic model for microalgae …