Digital Commons Network^™

Fabrication And Comparison Of Electrospun Cobalt Oxide-Antimony Doped Tin Oxide (Coo-Ato) Nanofibers Made With Ps: D-Limonene And Ps: Toluene, Manopriya Devisetty Subramanyam

USF Tampa Graduate Theses and Dissertations

This work investigates the fabrication, process optimization, and characterization of cobalt oxide-antimony doped tin oxide (CoO-ATO) nanofibersusing polystyrene (PS) solutions with toluene orD-limonene as solvents. These nanofibers are produced by anelectrospinning process. Nanofibers are fabricated using polymeric solutions of CoO doped ATO and mixtures of PS: D-limonene and PS:toluene. PSis a base aromatic organic polymer, a non-toxic material, and a versatile catalyst for fiber formation. PSsolutions are made by mixing polystyrene beads and D-limonene or toluene at specific weight percentages. These polymeric solutions of PS: D-limonene and PS:toluene are then mixed with CoO-ATO at various weight percentages. The two solutions …

Phenyl Functionalized Sol-Gel Silica Sorbent For Capillary Microextraction And Chromia-Based Sol-Gel Ucon Stationary Phase For Capillary Gas Chromatography, Michael M. Mclean

USF Tampa Graduate Theses and Dissertations

The first chapter of this thesis presents an introduction to sol-gel methodology whose usefulness as a synthetic route will be demonstrated with two applications in chromatography. The first application involves the fabrication of a capillary micro-extraction (CME) device by coating a phenyl functionalized extracting phase on the inner surface of a fused silica capillary for analyte pre-concentration. The device was coupled on-line to a RP-HPLC system and practicality was demonstrated using allergens as target analytes. The allergens chosen as model analytes are typically found in fragrance products and food. Most of the 26 fragrance allergens that are monitored by various …

Cloning And Characterization Of Il-1Β, Il-8, Il-10, And Tnfα From Golden Tilefish (Lopholatilus Chamaeleonticeps) And Red Snapper (Lutjanus Campechanus), Kristina L. Deak

USF Tampa Graduate Theses and Dissertations

Cytokines are pleiotropic and redundant signaling molecules that govern the inflammatory response and immunity, a critical ecological parameter for organism success and population growth. Produced at the site of injury or pathogen intrusion by a variety of cell types, cytokines mediate cell-signaling in either an autocrine or paracrine manner. The type and magnitude of the cytokine milieu produced subsequently dictates the strength and form of immune response. As the most diverse vertebrate group, with a high sensitivity to contaminants, fish represent an important foci for the evaluation of immune system evolution, function, and alteration upon toxicant exposure. While many cytokines …

Twenty-Five Years Of Giving: Using A National Data Set To Examine Private Support For Higher Education, Karen Ann Frank

USF Tampa Graduate Theses and Dissertations

Resource dependencies have increased substantially at colleges and universities over the years due to economic declines, recessionary periods, and decreased funding from state allocations. The purpose of this study was to advance an understanding of private support for higher education as a source of supplementary funding. As the environment continues to become more competitive for outside resources, institutions of higher education can benefit from more substantive and objective research on private voluntary support to better meet their growing needs for additional resources.

Effective financial management requires a greater understanding of the expected size of financial contributions to assist with strategic …

Penetration Through The Staple Punctures On Five N95 Respirator Models, Daniel E. Medina

USF Tampa Graduate Theses and Dissertations

Certain N95 FFR models that staple the head straps directly onto filtering material are commercially available. This method of assembly can tear or reduce fiber density in the immediate area surrounding the staple punctures. Five N95 FFR models were evaluated to determine if staple punctures on the filter medium reduce the protection offered by the respirators.

Total penetrations were measured with the staple punctures intact and when stretching the head straps a distance equivalent to a 95% male head circumference. Filter penetration were measured by sealing the staple punctures. Aerosols of 200, 500, and 1000 nm were used to challenge …

Perceptions Of Practitioners In A Voluntary Prekindergarten On Probation, Susan Evelyn Weber

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to describe and explain the perspectives and beliefs that practitioners have about prekindergarten in a Voluntary Prekindergarten program unable to meet minimal accountability requirements. The exploratory questions included: What are the beliefs and perceptions about effective and appropriate early childhood education among practitioners in a Voluntary Prekindergarten program on probation? And in what ways does probation influence practitioners' perceptions and beliefs about early childhood education? I used participants from a school where I conducted a pilot study. My data collection consisted of semi-structured interviews, resumes, my research reflective journal, and the centers program improvement …

Evaluating The Effectiveness Of A Wearable Technology For Increasing Physical Activity, Christopher Michael Nieves

USF Tampa Graduate Theses and Dissertations

Obesity in America has grown widespread over the past decade and is a significant social issue that affects many families. Identifying interventions that are not only effective in the natural environment but are easy to implement are ideal for helping individuals engage in more fitness related activities. The purpose of this study was to evaluate the effectiveness of the Nike^TM FuelBand for increasing physical activity in 3 adults. Additionally, a goal setting procedure was used to test if it enhanced the effects of the Nike^TM FuelBand. Three measures were collected as part of the study, Nike^TM Fuel, …

Teaching With The End In Mind: A Teacher's Life History As A Legacy Of Educational Leaders, Daryl Adam Ward

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to understand the life history of a female teacher by examining her beliefs about leaving a teaching legacy and by analyzing the narratives of four educational leaders as they reflect on the generative behaviors of this teacher. The research questions guiding this study were: (a) What elements of this teacher's life history contributed to creating a legacy of educational leaders? (b) What are the perspectives of the educational leaders impacted by this teacher as they relate to crafting an educational legacy? (c) How do the life stories of the teacher and educational leaders intersect …

A Passive Membrane Photobioreactor For The Isolated Cultivation Of Algal Resource Utilizing Selectivity (Icarus), With Wastewater As A Feedstock, Ivy Lea Cormier Drexler

USF Tampa Graduate Theses and Dissertations

Renewed momentum in the microalgae industry due to commercial interest in biofuels and bioproducts is driving the need to increase the economic competitiveness of large-scale microalgal production. Current knowledge of membrane systems common in other disciplines, such as environmental engineering, marine science, and biomedicine, are relevant to algae production. With pore sizes ranging from microns to angstroms, membranes provide tailored functions for solid/liquid separation (cell retention, biomass concentration and dewatering), gas/liquid separation (gas delivery and removal), and solute/liquid separation (bioproduct recovery, feedstock preparation and effluent recycling) that are problematic or not possible with other technologies. Though membranes have great potential …

Medicaid Pays For That? An Exploratory, Mixed-Methods Analysis Of Florida Home Birth, Nicole K. Demetriou

USF Tampa Graduate Theses and Dissertations

The overwhelming social norm for pregnant women in the U.S. is to receive prenatal care from an obstetrician and to give birth in a hospital setting. However, the incidence of midwifery care and out-of-hospital birth is increasing, particularly among White, non-Hispanic women. Florida has been considered a "model" state for home birth midwifery given legislative support that mandates coverage of all types of midwifery (e.g., Certified Professional Midwives and Certified Nurse-Midwives) care in all birth settings (e.g., hospital, home, birth center) and by all forms of insurance (e.g., commercial and Medicaid). Medicaid is the payer source for nearly half of …

Applicator Exposure To Glycol Derivatives And Total Volatile Organic Compounds During The Application Of Spray Polyurethane Foam Insulation, Michael Brian Kaniuga

USF Tampa Graduate Theses and Dissertations

There is currently high demand for new building materials which are considered "environmentally friendly" or "green" for both new construction and renovations. Spray polyurethane foam (SPUF) insulation has gained significant acceptance by both consumers and the construction industry due to its high R-value, which results into significant energy savings among other things. Despite its acceptance by consumers and the construction industry, consideration must be given to potential chemical exposures to applicators installing these products.

This study sought to determine, through quantitative experimentation, if there was a release of glycol derivatives including, diethylene glycol (DEG), ethylene glycol (EG), and propylene glycol …

A Decision Support Model For Personalized Cancer Treatment, Florentino Antonio Rico-Fontalvo

USF Tampa Graduate Theses and Dissertations

This work is motivated by the need of providing patients with a decision support system that facilitates the selection of the most appropriate treatment strategy in cancer treatment. Treatment options are currently subject to predetermined clinical pathways and medical expertise, but generally, do not consider the individual patient characteristics or preferences. Although genomic patient data are available, this information is rarely used in the clinical setting for real-life patient care. In the area of personalized medicine, the advancement in the fundamental understanding of cancer biology and clinical oncology can promote the prevention, detection, and treatment of cancer diseases.

The objectives …

Wastewater Nutrient Recovery Using Anaerobic Membrane Bioreactor Permeate For Hydroponic Fertigation, Jorge Luis Calabria

USF Tampa Graduate Theses and Dissertations

The imbalance between global population growth and resource consumption is indicative of unsustainable practices and foreshadows a grim future of continued resource depletion, food and water scarcity, social inequality, and deteriorating public and environmental health. Meanwhile, the urban centers of the world continue to experience exponential growth resulting in overwhelmed food, water, and sanitation infrastructure. Decentralized and satellite wastewater treatment technologies capable of resource recovery, such as anaerobic membrane bioreactors (AnMBR), foster synergistic opportunities to help manage the food, energy, and water sectors of urban environments. Specifically, the nutrient concentration and high effluent quality of permeate produced by AnMBR systems …

Not Enough Cooks In The Kitchen: An Empirical Test Of A Two-Factor Model Of Work Unit Understaffing, Cristina Keiko Hudson

USF Tampa Graduate Theses and Dissertations

Although most working adults possess a lay understanding of understaffing in the workplace and may, in fact, feel they are experiencing such a stressor, a review of the research literature reveals a general lack of empirical work on understaffing and its consequences. Hudson and Shen (2013, Development and testing of a new measure of understaffing. Paper presented at the Southern Management Association 2013 Meeting, New Orleans, LA) recently proposed a new model of understaffing that distinguished between two types of personnel deficiencies, manpower and expertise shortages, and linked these dimensions to worker well-being and attitudinal outcomes and identified likely mediating …

The Effects Of Emotive Reasoning On Secondary School Students' Decision-Making In The Context Of Socioscientific Issues, Wardell Anthony Powell

USF Tampa Graduate Theses and Dissertations

The discrepancy between what students are being taught within K-12 science classrooms and what they experience in the real world has been well documented. This study sought to explore the ways a high school biology curriculum, which integrates socioscientific issues, impacts students' emotive reasoning and their ability to evaluate evidence, make informed decisions on contemporary scientific dilemmas, and integrate scientific content knowledge in their reasoning on SSI. Both quantitative and qualitative methods were used to examine differences within and between an SSI treatment group and a comparison group as well as individual differences among students' responses over a semester of …

Telecommunication Network Survivability For Improved Reliability In Smart Power Grids, Sankalp Mogla

USF Tampa Graduate Theses and Dissertations

Power transmission grid infrastructures deliver electricity across large distance and are vital to the functioning of modern society. Increasingly these setups embody highly-coupled cyber-physical systems where advanced telecommunications networks are used to send status and control information to operate power transmission grid components, i.e., "smart grids". However, due to the high inter-dependency between the communication and power grid network layers, failure events can lead to further loss of control of key grid components, i.e., even if they are undamaged. In turn, such dependencies can exacerbate cascading failures and lead to larger electricity blackouts, particularly under disaster conditions. As a result, …

Exergetic Life Cycle Assessment Of Electrospun Polyvinylidene Fluoride Nanofibers, Salman Ali Abbasi

USF Tampa Graduate Theses and Dissertations

Assessing the sustainability of nanomanufacturing products and processes has been difficult to achieve using conventional approaches mainly due to an inadequate inventory, large process-to-process variation, and a dearth of relevant toxicology data for nanomaterials. Since these issues are long term in nature, it is required to create hybrid methodologies that can work towards filling the existing gaps. Merging thermodynamic techniques such as the exergy analysis with environmental assessments can help make better, more informed choices while providing an opportunity for process improvement by enabling to correctly quantify efficiency loss through the waste stream, and by locating the exact areas for …

Creating A Mythopoeic Graphic Novel To Expand Self-Understanding, Luis De La Lama

USF Tampa Graduate Theses and Dissertations

This is a study about how I produced a graphic novel to introduce a model of the self that is informed by complexity theory to an audience of comic book and graphic novel enthusiasts. Because this model of the self has the potential to preserve, extend, and/or reinforce character strengths that are operationalized as virtuous behavior, and that also function as inner resources in times of adversity, my study explores storytelling by sequential art as a communication method that some counselors and educators might use to counsel and educate large segments of popular culture. Also, more generally, I explore the …

Analysis Of Water Quality For Lake Tarpon, Pinellas County, Florida, Kristi Nichole Savio

USF Tampa Graduate Theses and Dissertations

Urbanization has taken a major toll on the water quality of Lake Tarpon. In response, there have been management strategies and legislation put in place to help improve water quality. Our objective was to identify what management strategies and other environmental factors were driving changes in Lake Tarpons water quality from 1970 - 2010. Trends in water quality were analyzed against precipitation, land use and water quality management strategies to achieve this. Results found that two water quality management strategies, the creation of the Lake Tarpon Outfall Canal and the closing of the Lake Tarpon Sink, improved water quality the …

Characterization Of The Airborne Particulates Generated By A Spray Polyurethane Foam Insulation Kit, Loren Lee Foster

USF Tampa Graduate Theses and Dissertations

Spray Polyurethane Foam insulation (SPF) kits are currently being marketed and sold to do-it-yourselfers to meet various insulating needs. Like commercial SPF systems, the primary health concern with SPF kits is user overexposure to the isocyanates during product application. The potential health risk associated with SPF applications is driven by several factors including (but not limited to): the toxicity of isocyanates; the potentially high exposure intensity; the quantity of isocyanates used in the process; the enclosed nature of the environment in which the product could be applied; the potentially high exposure duration/frequency; and the limited availability of control measures to …

An Investigation Of Methodologies For Determining Walkability And Its Association With Socio-Demographics: An Application To The Tampa - St. Petersburg Urbanized Area, Oana A. Mckinney

USF Tampa Graduate Theses and Dissertations

Walkability research has broadened in the past few years, being performed by researchers in different fields such as urban planning, public health, and transportation planning. Definitions of walkability and methods of operationalizing the concept vary widely. Since the results of studies that incorporate walkability may well have policy implications, it is important to consider the potential impacts of different definitions and methods of measurement.

This thesis investigates to what extent walkability indices may differ when either the composition of the indices is changed or when different quantitative methods of standardization are used to summarize their component measures. The association of …

Dynamics And Survival Of Coral And Octocoral Juveniles Following Disturbance On Patch Reefs Of The Florida Reef Tract, Lucy Bartlett

USF Tampa Graduate Theses and Dissertations

Over the past several decades, rapid decline in adult stony-coral (comprising the Orders Scleractinia and Anthomedusae, specifically Family Milleporidae) cover has occurred concurrent with an increase in adult octocoral (Octocorallia/gorgonian) cover along the Florida Reef Tract. In January 2010, the Florida Keys experienced extremely cold air and water temperatures, below the lethal threshold for many reef organisms including corals. Very high stony-coral mortality occurred on some patch reefs. The newly-available space created by this disturbance event provided the opportunity for recruitment and settlement of new coral larvae and other reef organisms.

The goal of this study was to examine post-disturbance …

An Exploration Of The Health Experiences Of Youth Who Were Trafficked For Sex, Christine Ann Meister

USF Tampa Graduate Theses and Dissertations

This pilot study used photovoice methodology to explore the current health needs of youth who were trafficked for sex and are now living in an alternative family care setting. The goals of this study were to add to the current literature regarding the health needs of victims of domestic minor sex trafficking and to add a qualitative aspect to the evaluation of the Citrus Helping Adolescents Negatively Impacted by Commercial Exploitation (CHANCE) program. Disposable cameras were distributed to a group of adolescent girls enrolled in the program who were then tasked with taking pictures of things that made them feel …

An Examination Of Coalition Functioning And Use Of Evidence-Based Practices: A Case Study Of Four Community Substance Abuse Coalitions, Nichole M. Snyder

USF Tampa Graduate Theses and Dissertations

There has been a recent expansion of community-based coalitions to address issues related to youth substance use. Research on their overall effectiveness, however, has produced mixed results. Recommendations to improve coalition success have emphasized the high-quality implementation of evidence-based programs targeting specific community needs. Coalitions vary extensively, however, in their organization and functioning. In addition, the lack of a universally accepted theoretical framework to understand coalition functioning has led to inconsistencies in the coalition research and the specific constructs used to describe coalition functioning.

Purpose of the Study: To address these gaps, the current study used a case study approach …

Accessibility's Influence On Population Location Near Light Rail In The Denver Region, Christophe Michael Zuppa

USF Tampa Graduate Theses and Dissertations

Accessibility is the most important concept in transportation planning because it describes the ease of travel to opportunities vital for everyday needs. Theoretically, people locate closer to transit corridors if accessibility improves. One desired benefit from light rail is denser land use patterns in the form of Transit Oriented Development (TOD) that captures population growth. In October 1994, the City of Denver, CO, joined the list of American cities that have implemented light rail within the last 33 years. Since then, five corridors have opened there, and planners are retooling their zoning codes to allow TOD near light rail. The …

Groundwater Controls On Physical And Chemical Processes In Streamside Wetlands And Headwater Streams In The Kenai Peninsula, Alaska, Michael Kroh Callahan

USF Tampa Graduate Theses and Dissertations

For this dissertation I studied groundwater and surface water interactions in the Kenai Lowlands, Alaska. In particular, I examine two important aspects of groundwater and surface water interactions: 1) Groundwater's influence on surface-water temperature; and 2) Groundwater's role in forming hydrologic flow paths that can connect uplands to streamside wetlands and streams. Chapter 2 investigates the controls on stream temperature in salmon-bearing headwater streams in two common hydrogeologic settings: 1) drainage-ways, which are low-gradient streams that flow through broad valleys; and 2) discharge-slopes, which are high gradient streams that flow through narrow valleys. The results from chapter 2 showed significant …

Substance Abuse Prevention In American Indian And Alaska Native Communities: Exploration Of Guiding Theoretical Underpinnings And Theoretical Fit In Practice, Margaret L. Walsh

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to identify ways Indigenous theoretical perspectives may guide current and future substance abuse prevention programs. As the majority of current theories guiding substance abuse prevention programs in American Indian and Alaska Native communities stem from Western ideologies and lack Indigenous perspectives, there is a paucity of research on theoretical underpinnings for Indigenous perspectives in AI/AN communities and their potential role in substance abuse prevention programming. It is well known that when programs are theoretically connected to the communities in which they are implemented, they are more likely to be accepted, accurately measured, and sustained …

Monitoring And Use Of Social Media In Emergncy Management In Florida, Leila Martini

USF Tampa Graduate Theses and Dissertations

The emergence of mobile technologies and social media applications has led to a shift in the emergency/disaster related communication environment. Citizens are playing an increasingly important role in providing real time information to emergency organizations. This shift has resulted in an expectation by the public that emergency management (EM) organizations monitor and respond to calls for help disseminated via these applications. The purpose of this study is to explore the extent to which Florida EM agencies have incorporated the monitoring of social media into their organizational processes.

The state of social media use in Florida is under researched. In this …

Human Mirna Sequence Based Variations Database, Nadim Georges Bou Zeidan

USF Tampa Graduate Theses and Dissertations

MicroRNAs (miRNAs) are studied as key genetic elements that regulate the gene expression involved in different human diseases. Clinical sequence based variations like copy number variations (CNVs) affect miRNA biogenesis, dosage and target recognition that may represent potentially functional variants and relevant target bindings.

To systematically analyze miRNA-related CNVs and their effects on related genes, a user-friendly free online database was developed to provide further analysis of co-localization of miRNA loci with human genome CNV regions. Further analysis pipelines such as miRNA-target to estimate the levels or locations of variations for genetic duplications, insertions or deletions were also offered. Such …

Operation Optimization And Water Quality Simulation Of Potable Water Distribution System, Xiongfei Xie

USF Tampa Graduate Theses and Dissertations

A potable water distribution system (WDS) consists of pipes, pumps, valves, storage tanks, control and supporting components. Traditionally, it has two basic functions. First, provides end users with potable water at sufficient pressures and good water quality. Second, provides sufficient pressure and flow for fire fighting. Currently, potable water is still the least expensive material for fire fighting. To accomplish these two goals, water utilities have to consider the integrity and security of the water network. As a result, this research selected three research topics that are closely related to the daily operation of water utilities and water quality simulation. …