Digital Commons Network^™

Autonomic Reactivity And Recovery In Healthy Black, White, And Hispanic Women With And Without A Family History Of Cardiovascular Disease, Mardís Sara Karlsdóttir

USF Tampa Graduate Theses and Dissertations

Exaggerated cardiovascular reactivity and impaired recovery to psychological stress is independently related to cardiovascular disease (CVD), and may play a causal role in its development. I examined autonomic reactivity and recovery in 136 black, white, and Hispanic women who were predisposed to CVD, as indicated by a positive family history (FH+). Pre-ejection period (PEP; sympathetic) and respiratory sinus arrhythmia (RSA; parasympathetic) were measured during public speaking, mental arithmetic, and cold pressor tasks. Overall, FH+ participants exhibited greater RSA reactivity, while black participants exhibited impaired RSA recovery. These findings suggest that a hereditary predisposition for CVD is related to altered autonomic …

Structural Diversity In Crystal Chemistry: Rational Design Strategies Toward The Synthesis Of Functional Metal-Organic Materials, Amy J. Cairns

USF Tampa Graduate Theses and Dissertations

Metal-Organic Materials (MOMs) represent an important class of solid-state crystalline materials. Their countless attractive attributes make them uniquely suited to potentially resolve many present and future utilitarian societal challenges ranging from energy and the environment, all the way to include biology and medicine. Since the birth of coordination chemistry, the self-assembly of organic molecules with metal ions has produced a plethora of simple and complex architectures, many of which possess diverse pore and channel systems in a periodic array. In its infancy however this field was primarily fueled by burgeoning serendipitous discoveries, with no regard to a rational design approach …

An Anatomical Investigation Of Higher Visual Structures In The Pigeon (Columba Livia), Tadd B. Patton

USF Tampa Graduate Theses and Dissertations

Early visual processing in the avian brain has been studied extensively, the retina and midbrain in particular. However, a clear understanding of the higher visual centers in the forebrain (the telencephalon and thalamus) remains poor. Two structures located within the avian visual telencephalon, the entopallium (E) and the lateral portion of the intermediate nidopallium (NIL), merit extensive investigation based on their critical role in visual processing. The goal of the current study was to further clarify the anatomical characteristics of E and NIL. Visual information that reaches these telencephalic structures is mostly from the contralateral retina. Thus, blocking visual input …

"Something Begins Its Presencing": Negotiating Third-Space Identities And Healing In Toni Morrison's Paradise And Love, Kristen King

USF Tampa Graduate Theses and Dissertations

Toni Morrison’s Paradise deconstructs the pathology of patriarchy and its oppressive nature, which limits language and knowledge. Patriarchal language silences female voice as they unknowingly adopt male definitions of gender and femininity. As long as the women are denied access to a language that allows them to define themselves, their existence is marked by a perennial state of self-destruction and stasis. As the women, specifically Consolata, begin to reject patriarchal limitations, they gain agency and with it an access to words and ideas that allow them to identify and articulate their own definition of self.

Morrison’s Love illustrates the individual’s …

Chk2 Is Negatively Regulated By Protein Phosphatase 2a, Alyson Freeman

USF Tampa Graduate Theses and Dissertations

Checkpoint kinase 2 (CHK2) is an effector kinase of the DNA damage response pathway and although its mechanism of activation has been well studied, the attenuation of its activity following DNA damage has not been explored. Here, we identify the B'α subunit of protein phosphatase 2A (PP2A), a major protein serine/threonine phosphatase of the cell, as a CHK2 binding partner and show that their interaction is modulated by DNA damage. B'α binds to the SQ/TQ cluster domain of CHK2, which is a target of ATM phosphorylation. CHK2 is able to bind to many B' subunits as well as the PP2A …

"Speaking" Subalterns: A Comparative Study Of African American And Dalit/Indian Literatures, Mantra Roy

USF Tampa Graduate Theses and Dissertations

“Speaking Subalterns” examines the literatures of two marginalized groups,African Americans in the United States and Dalits in India. The project demonstrates how two disparate societies, USA and India, are constituted by comparable hegemonic socioeconomic-cultural and political structures of oppression that define and delimit the identities of the subalterns in the respective societies. The superstructures of race in USA and caste in India inform, deform, and complicate the identities of the marginalized along lines of gender, class, and family structure. Effectively, a type of domestic colonialism, exercised by the respective national elitists, silence and exploit the subaltern women and emasculate the …

Effects Of Monoclonal Anti-Abeta Antibodies On The Amyloid Beta Peptide Fibrillogenesis And Their Involvement In The Clearance Of Alzheimer's Disease Plaques, Jeffy Pilar Jimenez

USF Tampa Graduate Theses and Dissertations

Alzheimer’s disease (AD) is the most common cause of senile dementia worldwide. AD is a neurodegenerative disorder characterized by the loss of memory and language skill, collapse of the cognitive function, and distortion of social behavior. As of today, the onset mechanisms of AD and cure are unknown; however, three hallmarks are commonly encountered: extra and intracellular accumulation of amyloid beta (A!) peptide plaques, formation of intracellular neurofibrillary tangles, and inevitable neuronal death. Hypothetically, a possible scenario provoking or involved in the onset of AD is a cascade effect that starts with an imbalance in the production and clearance of …

Chemical Investigation Of The Antarctic Marine Invertebrates Synoicum Adareanum And Artemisina Plumosa, Jaime Heimbegner Noguez

USF Tampa Graduate Theses and Dissertations

Of the small percentage of organisms chemically investigated over the years as potential sources of natural products, much less is known about those from the marine realm. Despite the lack of attention they have received in comparison to terrestrial organisms, marine life have recently been found to represent a valuable source for novel bioactive compounds. Cold water marine habitats are home to a plethora of organisms that have the ability to produce secondary metabolites that exhibit a great deal of diversity in both their chemical structures and biological activities. The chemical investigation of these unique and relatively unstudied ecosystems is …

Ecotourism And Water Quality: Linking Management, Activities And Sustainability Indicators In The Caribbean, Ken Darrie Thomas

USF Tampa Graduate Theses and Dissertations

Ecotourism from its genesis and founding theories has been set out to conserve and preserve the environment through sustainable operation that includes surrounding communities in efforts to reduce their poverty levels. Over the years ecotourism has been hypothesized to have departed from this ideal with several researchers, through social, qualitative analyses, have said that these non-sustainable ecotourism operations are simply due to poor management. This work sought to test this central hypothesis as a first approach to quantitatively linking ecotourism activities to management with surface water quality as the key indicator of sustainable ecotourism as a complex system through systems …

Regulation Of Positive Regulatory Domain I- Binding Factor 1 And Its Role In Mantle Cell Lymphoma, Shruti Desai

USF Tampa Graduate Theses and Dissertations

The human positive regulatory domain I binding factor 1 (PRDI-BF1/PRDM1) promotes differentiation of mature B cells into antibody secreting plasma cells. In contrast ectopic expression of PRDM1 in lymphoma cells can lead to inhibition of proliferation or apoptosis. However, little is currently known about the regulation of PRDM1. The first study presented demonstrates that in lymphoma cells stimulation through the B cell receptor rapidly induces endogenous PRDM1 at the level of transcription. This study provides evidence that the PRDM1 promoter is preloaded and poised for activation in the B cell lines. The transcription factor PU.1 is shown to be required …

A Multi-Wilkinson Power Divider Based Complex Reflection Coefficient Detector, James Roger Cooper

USF Tampa Graduate Theses and Dissertations

In the field of applied electromagnetics, there is always a need to create new methods for electrical characterization of materials, systems, devices, etc. Many applications need small and/or inexpensive equipment in performing these characterizations. The current method for making measurements of electrical properties at frequencies above 300 MHz, the transmission/reflection method, has severe limitations in these areas due large size and high price of the necessary equipment for making them. Therefore, presented herein is the conceptualization, design and analysis of a complex reflection coefficient detector which is relatively small, lightweight, and inexpensive.

A reflection coefficient detector is a device designed …

Examining The Interface Between Alcohol Expectancies, Psychophysiological Reactivity To Alcohol Picture Cues, And Risk For Substance Use Disorders, Ashlee C. Carter

USF Tampa Graduate Theses and Dissertations

The study examined the overlap between cognitive and affective measures of alcohol expectancies as they related to risk for developing alcohol use disorders. It was hypothesized that cognitive-based, paper-and-pencil measures and appetitive psychophysiological reactivity to alcohol cues would correlate and independently correlate to drinking behavior in a sample of college drinkers. It was also hypothesized that genetic risk would impact the relationship between upstream and downstream expectancy measures, given that children of alcoholics displayed blunted reactivity to appetitive cues.

A sample of 137 college drinkers (67 males; mean age = 20.23 ± 1.61) reporting a range of drinking behavior (mean …

Design And Characterization Of Microwave Assisted Plasma Spray Deposition System: Application To Eu Doped Y2O3 Nano-Particle Coatings, Marek Radoslaw Merlak

USF Tampa Graduate Theses and Dissertations

This thesis presents a Microwave Plasma Assisted Spray Deposition (MPASD) system design, characterization, and application to produce nano-sized particle coatings of metal oxides. A commercially available rectangular waveguide microwave power delivery system is utilized to initiate and sustain the plasma discharge within the customized plasma applicator where micron-sized droplets of a metal ion solution are heated to evaporate the solvent and thermally process the resulting nano-sized particles. The investigation of optimum conditions for oxygen, argon, and air plasma ignition in the MPASD system was presented. Measured electron temperature of the plasma was between 6000K and 40000K for the plasma conditions …

A Descriptive Study Of The Achievement Gap In A Florida County, Harriet Davis-Waller

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to describe and explain the perspectives of five participants representing the school district and community regarding the achievement gap between Black and White students. This study attempted to answer two major questions:

1. What are the components of their perspectives and how they are formed?

2. What beliefs support or hinder that perspective? In this study social conflict theory was used as the theoretical framework for this study, harnessing the concept of resiliency as a new paradigm shift looking at Black students and community not as "deficient" or "deficits" but implementing their unique cultural …

Rem: Relational Entropy-Based Measure Of Saliency, Kester Duncan

USF Tampa Graduate Theses and Dissertations

The incredible ability of human beings to quickly detect the prominent or salient regions in an image is often taken for granted. To be able to reproduce this intelligent ability in computer vision systems remains quite a challenge. This ability is of paramount importance to perception and image understanding since it accelerates the image analysis process, thereby allowing higher vision processes such as recognition to have a focus of attention. In addition to this, human eye fixation points occurring during the early stages of visual processing, often correspond to the loci of salient image regions. These regions provide us with …

Sound Production And Behavior Of Red Grouper (Epinephelus Morio) On The West Florida Shelf, Misty D. Montie

USF Tampa Graduate Theses and Dissertations

Red grouper (Epinephelus morio) are long-lived, commercially important, soniferous fish belonging to the family Epinephelidae. Found throughout the western North Atlantic and Gulf of Mexico, they are protogynous hermaphrodites, and peak spawning occurs from March through May. Unlike many grouper species, red grouper do not form large spawning aggregations; rather, they form small polygynous groups, and remain in relatively close proximity to rocky depressions excavated in the sandy bottom by males. This excavation activity creates structure and habitat for a wide variety of species, and as a result, red grouper are a keystone species on the West Florida Shelf. While …

Exergy Modeling To Compare Engineered Products To Biological Systems For Sustainable Design, Richard D. Stokes Jr.

USF Tampa Graduate Theses and Dissertations

An ambitious and novel approach to engineering design and sustainability has been taken to explore the potential of drawing parallels between mechanical and biological systems for the possible development of sustainable engineering design metrics using a thermodynamic model. This approach looks to biology. Natural selection has given biological beings and processes high exergetic efficiencies, even while being only 30-40% energy efficient on the cell level. This energy inefficiency, resulting in a release of heat, can then be used to aid in driving other biochemical processes. The Gibbs free energy becomes more negative proportionally with an increase in temperature, resulting in …

Human-Wildlife Conflict Across Urbanization Gradients: Spatial, Social, And Ecological Factors, Amanda H. Gilleland

USF Tampa Graduate Theses and Dissertations

As suburban and exurban residential developments continue to multiply in urban areas, they encroach on wildlife habitats leading to increased human-wildlife interactions. The animals involved in direct conflict with homeowners are often relocated or exterminated by the homeowners. Often the homeowners contact state licensed wildlife trappers to eliminate the problem animal. In this study I examined how landscape, ecological, and social factors influence the incidence of human-wildlife conflict of thirty two residential areas in the Tampa, Florida metropolitan area. These residential areas, totaling over 300 km2, are part of the urban development gradient representing a range of urban land use …

Evaluation Of The Flicker Effect As A Generative Strategy In Enhancing Computerbased Instruction (Cbi) Of Visual Recognition And Classification, Ping Luo

USF Tampa Graduate Theses and Dissertations

Few studies address the question of the technology-based instructional methods of visual patterns, so the overarching purpose of this study was to investigate the effects of three treatments on pattern recognition. Specifically, with a pretest-posttest control group experimental study, the effectiveness of three instructional strategies, a flicker treatment, a no-flicker treatment, and a comparison treatment, (groups respectively analyzing sequential displays of two similar images with and without a blank screen in between and simultaneous displays of two images), was compared based on recognition (memory) and classification (transfer) test scores. The group differences in learning effectiveness and efficiency were also measured …

Founding Fathers: An Ethnic And Gender Study Of The Iliadic Aeneid, Rob Brannon

USF Tampa Graduate Theses and Dissertations

In a 2005 work, Yasmin Syed concluded that the Aeneid created for ancient readers an idea of Romanness that was inclusive for all and not founded along strict genetic lines. Under this hypothesis, the Aeneid offers a sort of blueprint for becoming Roman, one in which biological descent from Aeneas is unnecessary. Syed reached this conclusion by analyzing themes of ethnicity and gender, in particular the ethnic other represented by the epic's female characters. This was accomplished in the manner so often chosen by Vergil scholars-by limiting analysis to the first half of the epic. The work concludes with an …

Carbon Dioxide Capture From Fossil Fuel Power Plants Using Dolomite, Drupatie Latchman

USF Tampa Graduate Theses and Dissertations

The main objective of this research is to develop a simple and cost effective separation method that captures carbon dioxide from power plant flue gas, as a pure stream that can be stored using regenerable dolomite (calcium magnesium carbonate) as the sorbent. The developed dolomite sorbent was evaluated for carbon dioxide capture capacity using muti-cycle tests of cyclical carbonation/calcination experiments in the thermogravimetric analyzer (TGA) model SDT 600. The variables controlled in the experiment were weight of calcium oxide and sintering time of the sample. The dolomite materials investigated were from two sources Alfa Aesar and Specialty Minerals. The prepared …

Illusion In Troilus And Cressida, Edward Janz

USF Tampa Graduate Theses and Dissertations

This thesis is an examination of Shakespeare's 1603 satire Troilus and Cressida that looks at illusion and the value given to it by means of war, Helen of Troy, and ultimately the two lovers themselves. Although it is depressingly obvious throughout the drama that life is an illusion, it is also obvious that there is a need for that illusion, and an equally profound necessity to have the illusion debunked.

The first part of the thesis examines the impact of war on Troy. This part concentrates on the myth of the hero, who like Falstaff presents himself to the world …

Neuroprotection With Anesthetics In Two Models Of Cerebral Ischemia, Rafael Eduardo Chaparro Buitrago

USF Tampa Graduate Theses and Dissertations

Neuroprotection with anesthetics has been studied for many decades; important advances in this field have modified the way Anesthesiologists treat patients in the operating room. Animal models have played an important role in the study of ischemia in the operating room. Recent studies have demonstrated that the effect of anesthetics seems to be different in different animal models. We decided to evaluate anesthetics in a well-known model of cerebral ischemia and also in hypotensive models designed by us. We used a model of cerebral ischemia (MCAO) to test anesthetics neuroprotective effect in a two-week period. Then, we used a model …

A Descriptive Study Of The View From The Top: Perspectives Of Experts In Continuing Medical Education, Martha C. Baker

USF Tampa Graduate Theses and Dissertations

This study describes and explains the perspectives of selected experts in continuing medical education (CME) and provides a glimpse at their lived experience. The theoretical frameworks are inclusive of constructivism and social constructivism reflecting the learning that takes place in medicine and that which occurs in the interview process. The voice of the researcher is heard through her professional role as a continuing medical education provider.

The major elements of CME are identified as the role of accreditation and physician involvement in the design and delivery of CME; the primary influences as funding, physician involvement and accreditation; the significant issue …

Who Owns Disability? An Investigation Into The Politics Of Representation, Shelby Forbes

USF Tampa Graduate Theses and Dissertations

In this thesis, I show how a community of professionals providing equine therapy to individuals with disabilities discursively make sense of their enterprise. A market metaphor illustrates how disability is constructed as the capital sustaining the livelihood of their industry. Disability is a problem-centered concept. It is generally conceptualized according to a medical model which locates disability within the individual, as opposed to understanding it in a sociological sense which accounts for structural, cultural, and communicative factors. Therapy, on the other hand, is problem-determined-it needs to explicitly determine a problem to be treated in order to sustain itself as an …

Analysis Of Mangrove Structure And Latitudinal Relationships On The Gulf Coast Of Peninsular Florida, Peter Novitzky

USF Tampa Graduate Theses and Dissertations

The coastline of Florida has been formed by geomorphic processes which have created suitable habitats for certain vegetation and organisms. One type of vegetation is the mangrove; this plant has a latitudinal range of 24° to 32° N latitude which is associated with local climatic changes (Mitsch 2000). There are three species of mangrove found in Florida: red (Rhizophora), black (Avicennia), and white (Languncularia) (USGS 2006). Mangroves have adapted overtime to live in different ecosystems which cause mangroves, along the Florida coast, of the same species not be the same.

Climatic variation causes individual mangrove trees have structural differences such …

From Airport To Spaceport: Designing For An Aerospace Revolution, Paula Selvidge

USF Tampa Graduate Theses and Dissertations

"Airports will shape business location and urban development in the 21st century as much as highways did in the 20th century, railroads in the 19th and seaports in the 18th" - John D. Kasarda, Ph.D. Kenan-Flagler Business School, University of North Carolina http://www.aerotropolis.com/author.html

I say, spaceports will shape the urban development of the 21st century, more than airports, bringing about an aerospace revolution. Just as new technologies triggered the global revolutions of the past, so the invention of reusable spacecraft will revolutionize transportation.

The invention of such spacecraft suggests the need for a different kind of transportation hub: a spaceport. …

Prospects For Nuclear Non-Proliferation: An Actor-Oriented Case Study Of Iran’S Future, James Martin Lockwood

USF Tampa Graduate Theses and Dissertations

This study is designed to assess the effectiveness of the Nuclear Non-Proliferation Regime and analyze theories for effectively analyzing countries that are a risk for proliferating nuclear armaments. The initial phase of my research is designed to assess the existing literature and primary theoretical approaches for analyzing nuclear non-proliferation initiatives and potential nuclear proliferators. My main means of analysis will be to examine the national and international actors involved in each case. With this method, I plan to analyze a government at the level of each of its ruling institutions. Each of these institutions will be analyzed in the context …

Local Environmental Perceptions And Cognitive And Affective Learning In A Rural, Andean Community In Mollepata, Peru, Luisella Mazzone De Angelis

USF Tampa Graduate Theses and Dissertations

This study examines the linkages between environmental field trips and cognitive and affective gains in two groups of homogenous elementary-aged students in Mollepata, Peru. One group participated in an environmental field trip to a local, non-profit farm (Aprodes) to explore watershed and agricultural issues. The second group received the same content within the classroom setting. The research also examines the environmental perceptions of local residents via semi-formal open-ended interviews to assess their environmental awareness and their willingness to receive environmental education services from an outside organization.

Data were collected both quantitatively and qualitatively via pre and post tests containing science …

Differential Decomposition Patterns Of Human Remains In Variable Environments Of The Midwest, Melissa A. Pope

USF Tampa Graduate Theses and Dissertations

Where do people die alone when they remain undiscovered for extended periods of time? Estimation of the postmortem interval (PMI) is critical to reconstructing the events surrounding a person's death and this is an area in which forensic anthropologists have played a leading role. This thesis applied an anthropological framework that takes a comprehensive approach to analyzing the demography of unaccompanied deaths, the relationships and timing of decomposition in multiple depositional contexts, and created a model for the prediction of accumulated degree days (ADD) for bodies within enclosures.

While there have been extensive experimental and case study reviews on decomposition …