Digital Commons Network^™

Mechanistic Modeling Of Photocatalytic Water Disinfection, Omatoyo Kofi Dalrymple

USF Tampa Graduate Theses and Dissertations

The main goal of this research was to develop a mechanism-based model for photocatalytic disinfection of bacteria in water using suspended catalyst pthesiss in batch reactors. The photocatalytic disinfection process occurs as a semiconductor photocatalyst, most commonly titanium dioxide (TiO₂), is irradiated with light of wavelength less than 380 nm to produce hydroxyl radicals and other highly reactive oxidants which can inactivate microorganisms. Photocatalytic disinfection involves a complex interaction of many fundamental mechanisms such as light absorption and scattering by semiconductor pthesiss, electrochemical surface reactions, and heterogeneous colloidal stability. Current models, based largely on chemical reacting systems, do …

The Integration Of African Muslim Minority: A Critique Of French Philosophy And Policy, Amber Nichole Dillender

USF Tampa Graduate Theses and Dissertations

The numerous images of violence perpetrated by radicalized followers of Islam, has highlighted the complexities surrounding assimilation and integration of Muslims in Western society. Since the guest worker recruitment from French African colonies initiated after World War II, France has been witness to the unanticipated development of permanent communities of African laborers, many of whom are Muslim. Despite consistent promotion of French monoculture and specifically the use of the assimilation model for integration, segregation of African Muslims has occurred. Through the construction of a single country case study, I explore integration issues surrounding the French Muslim minority communities. I seek …

A National Survey Of Instructional Strategies Used To Teach Information Systems Courses: An Exploratory Investigation, Yenni Merlin Djajalaksana

USF Tampa Graduate Theses and Dissertations

Many universities and colleges have placed increased emphasis on teaching excellence in higher education. Efforts to promote teaching excellence vary from the development of alternative new pedagogies as well as research exploring strategies to improve existing teaching practices. Logically, different disciplines employ different instructional strategies to prepare their graduates with specific skills, knowledge, and attitudes. This study examined the instructional strategies used most frequently in the information systems discipline and was inspired by Shulman's (2005) concept of signature pedagogies - the unique but pervasive ways of teaching within a discipline or profession.

This dissertation reports a national survey of instructional …

Population Biology, Ecology, And Ecosystem Contributions Of The Eastern Oyster (Crassostrea Virginica) From Natural And Artificial Habitats In Tampa Bay, Florida, Michael Drexler

USF Tampa Graduate Theses and Dissertations

The objective of this project was to document the status of oysters, Crassostrea virginica, from non-reef habitats throughout Tampa Bay, Florida, and assess the ecosystem contributions of those populations relative to reef-dwelling oysters. The aspects of oyster ecology studied here include condition, prevalence and intensity of disease (Perkinsus marinus - dermo), reproductive activity (including stage, fecundity, and juvenile recruitment), adult oyster density, and the faunal community associated with the oysters.

The predominant source of variation was seasonal, with lesser contributions among sites, and in most cases, little or no effect of the habitat type. Oysters populations from each habitat …

Up In The Air: The Global Economy, Economic Development, And Air Transportation In Tampa Bay, Florida, Clinton M. Elbow

USF Tampa Graduate Theses and Dissertations

A globally integrated economy is one of the most prominent features of globalization and how city stakeholders respond to the global economy varies from city to city. Connecting to the global economy is often portrayed to be necessary for the continued economic development of a metropolitan area. Large transportation infrastructures such as airports represent one of the most visible ways of connecting to the global economy. Decisions made by city stakeholders regarding airports in order to reposition their city in the global economy have profound consequences for its residents. This thesis aims to examine the role played by air transportation …

Shifting Blackness: How The Arts Revolutionize Black Identity In The Postmodern West, Reginald Eldridge Jr

USF Tampa Graduate Theses and Dissertations

The contemporary experiences of racially marginalized people in the West are affected deeply by the hegemonic capitalist Orthodox cultural codes, or episteme, in which blackness operates as the symbol of Chaos. As it relates to people of African descent, these affects are marked by a denial of the black person's full status as an unproblematic subject, by ontological voids arising from the practice of enslavement over the past centuries, and by problems of representation within the West, where examples and points of reference for black identity are always tied up with conflicting interests.

Utilizing Sylvia Wynter's model of the Ceremony …

Carbon Nanotubes Interactions: Theory And Applications, Adrian Popescu

USF Tampa Graduate Theses and Dissertations

A theoretical framework describing the carbon nanotubes interaction, involving two distinct approaches, is presented. Based on the results obtained practical applications using carbon nanotubes are further proposed.

First a classical approach is employed for different geometrical configurations, such as parallel or concentric carbon nanotubes. For all the cases analytical expressions for the systems potential energies are derived.

The results obtained using the classical approach are used to propose a few practical applications. These applications include a non-contact device for profiling surfaces and a custom telescopic double wall carbon nanotube for nanolithography applications. It is expected that such devices can be …

Sequential Anaerobic And Algal Membrane Bioreactor (A2mbr) System For Sustainable Sanitation And Resource Recovery From Domestic Wastewater, Ana Lucia Prieto

USF Tampa Graduate Theses and Dissertations

An innovative wastewater treatment technology was developed to recover renewable resources, such as water, energy and nutrients, from sewage. First, a novel synthetic sewage was evaluated for its suitability to serve as an alternative substrate for lab-scale wastewater treatment (WWT) research. Based on granular dried cat food, Complex Organic Particulate Artificial Sewage (COPAS) is a commercially-available, flexible, and easy to preserve feed. Characteristics of COPAS, namely chemical composition, disintegration/dissolution kinetics, and anaerobic biodegradability, were determined. Anaerobic bioassays indicate that COPAS is highly biodegradable at the concentration used to simulate household sewage (1000 mg/L), with more than 72% of the theoretical …

Realizing Virtuality: Tracing The Contours Of Digital Culture, Nicholas Andrew Riggs

USF Tampa Graduate Theses and Dissertations

People connect digitally through social media, fusing their relationships with meaning in a non-space of relational potential--a translucent and fluctuating enclave where the self becomes elastic. This thesis explores how I have formed bonds in virtual space through ritual interaction. Looking at the ways I learned to use technology through the progression of a close personal relationship, I suggest that social media use is a performance of identity--a virtuality that exposes how people negotiate the digital enclosure of contemporary society. My story is one of digital nativity and reclaiming love through virtual performance. I show how these performances have had …

Secreted Factors From Human Umbilical Cord Blood Cells Protect Oligodendrocytes From Ischemic Insult, Derrick Rowe

USF Tampa Graduate Theses and Dissertations

Oligodendrocytes (OL)s are the dominant cell type in the white matter and are integral for synaptic transmission essential for proper neuronal communication between brain areas. Previous studies have shown that intravenous administration of the mononuclear fraction of human umbilical cord blood (HUCB) cells in rat models of stroke reduced white matter injury, gray matter injury and behavioral deficits. Yet the mechanisms used by HUCB cells remain unknown in ischemic injury. These studies will investigate both in vitro and in vivo approaches to elucidate this mechanism in OLs. When mature primary OLs were coincubated with HUCB cells, HUCB cells secreted soluble …

National Identity, Gender, And Genre: The Multiple Marginalization Of Lotte Reiniger And The Adventures Of Prince Achmed (1926), K. Vivian Taylor

USF Tampa Graduate Theses and Dissertations

Contemporary American visual culture is saturated with animation, from websites and advertisements to adult and children's television programs. Animated films have dominated the American box office since Toy Story (1995) and show no signs of relenting, as demonstrated by Up (2009) and Alice in Wonderland (2010). Scholarly interest in animation has paralleled the steady rise of the popularity of the medium. Publications addressing animation have migrated from niche journals, such as such as Animation Journal and Wide Angle, to one of the most mainstream English-language publications, the Modern Language Association's Profession, which included Judith Halberstam's article "Animation" in …

School Psychologists' Communication And Collaboration With Community-Based Mental Health Professionals, Audra St. John Walsh

USF Tampa Graduate Theses and Dissertations

Although collaboration between school psychologists and community-based mental health professionals is essential in the provision of comprehensive and effective mental health services for youth with intensive mental health needs, youth may not receive the full benefit of these coordinated efforts, as collaboration may not occur as often as it should. This study investigated the frequency of communication and collaboration between school- and community-based professionals, the purposes and methods of communication, and the benefits and barriers to collaboration. Survey data from 80 members of the Florida Association of School Psychologists were collected and analyzed. Forty-three percent of school psychologists reported communicating …

Differential Reactions To Men's And Women's Counterproductive Work Behavior, Jason Donovan Way

USF Tampa Graduate Theses and Dissertations

This purpose of this study was to examine the effect that employee gender might have on performance ratings. Specifically, it was thought that negative performance episodes, such as aggressive behavior, might have less of an effect on performance ratings for males compared to females because males have a stereotype of being more aggressive. Additional hypotheses examined how different types of negative performance affected perceptions that the employee was behaving according to their gender ideal, and whether people judged male and female aggressiveness differently. To this end, 134 undergraduate students participated in a 2 x 3 design experiment where they read …

Detection Of Polybrominated Diphenyl Ethers In Ambient Air At A Wastewater Treatment Facility In Tampa, Florida, Brenda L. White

USF Tampa Graduate Theses and Dissertations

The goal of this study was to quantify the ambient air concentrations of polybrominated diphenyl ethers (PBDEs) from three locations within the Howard Curren Wastewater Treatment Facility located in Tampa, Florida. PBDEs have been linked to endocrine disruption, cancer, developmental concerns in children, as well as other toxic effects; however their precise roles concerning these deleterious effects remains to be determined. The present study was motivated by these potential health concerns posed by inhalational exposure to PBDEs. Ambient air was monitored with a Tisch Environmental PUF high volume sampler for 48 hours with collection on three types of media-quarts filter, …

Cactus Mucilage-Assisted Heavy Metal Separation: Design And Implementation, Dawn Iona Fox

USF Tampa Graduate Theses and Dissertations

Natural contamination of groundwater by arsenic (As) has become a critical public health threat in many parts of the world. The well-known regions associated with As contamination of groundwater are Bangladesh and West Bengal, India where approximately 100 million people are exposed to high levels of arsenic by drinking arsenic-contaminated groundwater and about 35 million are already affected. Long-term drinking of arsenic-contaminated water leads to arsenicosis, which is characterized by cancers of the skin, organ disease and certain other types of cancer. Affected developing communities are at higher risk because they may not have access to conventional water treatment facilities. …

Public Perceptions Of Organizational Culture And Organization-Public Relationships, Cherisse Fonseca Rivera

USF Tampa Graduate Theses and Dissertations

Almost 30 years ago, public relations scholars began to process the idea that the concept of culture was important to public relations practices. In particular, scholars questioned what influence culture might have on the communication process and relationship building between organizations and their stakeholders. Yet, today culture is still an understudied concept in the public relations literature. The purpose of this study is to analyze how of organizational culture, as defined by Sriramesh, J. E. Grunig, and Dozier (1996), is significant to the relationship outcomes in public relations. The theoretical framework for this study consists of organizational culture theory and …

Female Teachers As Sexual Predators: A Qualitative Study Of Grades 7-12 In The State Of Florida's Public Schools, Jayme Lynn Joslyn

USF Tampa Graduate Theses and Dissertations

This study's purpose was to discover commonalities and differences among female predators and Florida female teachers who are perceived and reported to harass students sexually. When perceived and reported female sexual harasser and student safety was researched, a breath of studies did not occur. When current studies were reviewed, teacher sexual harassment continued to occur. In this qualitative study, ten Florida public school female teachers who were perceived and reported to sexually harass students were randomly selected. Findings indicted that further research is still needed on female teachers who are perceived and reported to sexually harass students. When researching the …

Associate Degrees In Health Related Occupations As Predictors Of Success In Physician Assistant Programs, David E. Kotun

USF Tampa Graduate Theses and Dissertations

The primary purpose of this study was to determine if applicants who had an associate degree in the health sciences prior to acceptance to a physician assistant program would do better than those applicants without an associate degree in the health sciences on three measures of success of physician assistant education. The three measures of success used were graduation rates, scores on the Physician Assistant Knowledge Rating and Assessment Tool (PACKRAT), and performance on the national certifying exam, the Physician Assistant National Certification Examination (PANCE). Data used for this dissertation were taken from original source documents and raw data sent …

Performance Assessment Of Predicted Heat Strain In High Heat Stress, Ronald Eugene Long

USF Tampa Graduate Theses and Dissertations

Heat stress is a common physical agent associated with many occupations. The most commonly used method of assessing heat stress exposure is an empirical method using the Wet Bulb Globe Temperature Index but his method is limited in its ability to parse out individual contributors to the heat stress. The International Organization for Standardization (ISO) published a rational model called Predicted Heat Strain (PHS) in 2004, and rational methods have the advantage of separating out the individual pathways for heat exchange. The objective of this research was a performance assessment of the current PHS model. This experimental design consisted of …

Saved By The (Alexander Graham) Bell: An Analysis Of Synchronous Communication And Student Satisfaction / Retention Rates In The First Year Online Composition Classroom, Jennifer Jane Lynch

USF Tampa Graduate Theses and Dissertations

Online first-year writing courses, with all of their promise, still maintain alarmingly low retention and student satisfaction rates, driving online curriculum designers to take another look at ways to increase both retention and satisfaction. To replicate the high rates of face-to-face classes, we must revisit and revise our approach to communication in the first-year writing online classroom. Think about it: The online classroom has abandoned a mainstay in education for thousands of years - synchronous communication. Why have we been so quick to dispose of it? Are we now paying the price?

This research will provide additional value to the …

Crystal Engineering Of Pharmaceutical Cocrystals, Sreya Mukherjee

USF Tampa Graduate Theses and Dissertations

Pharmaceutical cocrystals use principles of crystal engineering for the design of crystalline forms of drugs and can improve their solubility, bioavailability, stability and other important properties without changing the efficacy of the drug. Herein reported are pharmaceutical cocrystals of two API's, caffeine and Pentoxifylline.

Research has indicated that caffeine has the ability to reverse AB; plaque deposition in the brain (believed to be the primary cause of Alzheimer's pathogenesis) and thus revert memory and improve cognitive impairment. But owing to the fast absorption rate and short half life, a controlled release formulation of caffeine would be clinically beneficial. Thus, novel …

New Media Photographic Representations Of Women`S Collegiate Volleyball: Game Faces, Action Shots, And Equipment, Alicia Pack

USF Tampa Graduate Theses and Dissertations

Researchers consistently find that mainstream media often represent women athletes in stereotypical ways including trivialization, sexualization, infantilization, passivity, and utilization of camera down-angles. However, research on new media's visual representation of women athletes is still in its infancy. This study adds to the growing literature on new media's representation of women athletes and concurs with previous findings suggesting that new media might be an outlet that can counter old media gender stereotypes. This thesis used mixed methods of qualitative content analysis and photovoice in order to better understand how Big East volleyball players are represented in photographs on websites: Instances …

Natural Product Drug Discovery Against Tropical Diseases, Wai Sheung Ma

USF Tampa Graduate Theses and Dissertations

This dissertation describes the isolation of secondary metabolites from natural origins through a series of chromatographic techniques and spectrometric characterization in the effort of drug discovery. The isolated compounds obtained were used as drug leads against tropical diseases, namely malaria and leishmaniasis. While first chapter offers an introduction on the use of a natural product by itself as an effective therapeutic and its role on inspiring the discovery of new drugs, the later chapters will concentrate on isolation and characterization of bioactive natural products from an Antarctic sponge and mangrove endophytic fungi during the dissertation work.

The second chapter describes …

Numeracy, Cancer Risk Perceptions, And Self-Protective Behaviors Among U.S. Adults, Teri Malo

USF Tampa Graduate Theses and Dissertations

Individuals have become more involved in health-related decisions, in part due to an unprecedented access to information that can be used to enhance both physical and mental health. Much of this health-related information is presented in a numerical format; unfortunately, research suggests many Americans may not possess the literacy skills necessary to comprehend numerical health-related information. More research needs to be conducted to examine numeracy and its role in cancer risk perceptions, and how those risk perceptions relate to cancer self-protective behaviors. The purpose of the current study was to: (a) examine socio-demographic variables associated with numeracy, (b) determine which …

Framing 10/12 And 3/11 In American And European News, Andrea Lypka

USF Tampa Graduate Theses and Dissertations

This media analysis of the incidents in Bali in 2002 (10/12) and Madrid in 2004 (3/11) reveals the black and white portrayal of these attacks in western news through the localization of international terrorism occurrences, pro-government perspective, and internalization of U.S. policies. The Old Europe and New Europe debate further fractures the European press. Such rhetoric perpetuates the "us versus them" schism by contrasting the goals of the alleged perpetrators with the western values of democracy and freedom. Governmental sources remain central news sources during these crises. In addition, 9/11, war on terrorism, and fear from further attacks dominate news …

Internet Use And Economic Development: Evidence And Policy Implications, Joseph J. Macdougald

USF Tampa Graduate Theses and Dissertations

This dissertation explores how Internet use impacts four different measures of economic development using several econometric techniques on multi-country panel data. The economic development outcomes investigated are: per capita GDP, per capita export revenues, per capita market capitalization, and societal well-being as measured by the United Nations Human Development Index (HDI). Data from the World Bank, the International Telecommunication Union, and the United Nations –covering 202 countries over the period 1996 to 2007– are combined to allow for empirical investigation using dynamic panel data and finite mixture model estimation techniques on the total sample and subsamples stratified by country income …

Understanding The Psychosocial Aspects Of Waterpipe Smoking Among College Students, Mary Pautler Martinasek

USF Tampa Graduate Theses and Dissertations

Waterpipe tobacco smoking has migrated from being a custom of some cultures to becoming a staple around college campuses. The social nature and flavored tobacco encourage initiation in this tobacco naïve age group.

The study was a sequential mixed method design, employing primary data collection and analysis of a random sample of university students who live on campus at a single university. The study involved observations (N=6), intercept interviews with smokers and nonsmokers (N=63), three focus groups (N=31), and an online survey (N=288).

Findings were centered on the constructs of the Theory of Reasoned Action by Ajzen and Fishbein (1975), …

Atomistic Studies Of Shock-Wave And Detonation Phenomena In Energetic Materials, Mikalai Budzevich

USF Tampa Graduate Theses and Dissertations

The major goal of this PhD project is to investigate the fundamental properties of energetic materials, including their atomic and electronic structures, as well as mechanical properties, and relate these to the fundamental mechanisms of shock wave and detonation propagation using state-of-the-art simulation methods. The first part of this PhD project was aimed at the investigation of static properties of energetic materials (EMs) with specific focus on 1,3,5-triamino-2,4,6-trinitrobenzene (TATB). The major goal was to calculate the isotropic and anisotropic equations of state for TATB within a range of compressions not accessible to experiment, and to make predictions of anisotropic sensitivity …

In Situ Biofiltration Of Dissolved Organic Carbon In Reverse Osmosis Membrane Filtration, Russell Rosario Ferlita

USF Tampa Graduate Theses and Dissertations

Biofouling, or the formation of biofilm on membrane surfaces, can decrease the performance (decreased flux and/or increased operating pressure) of a reverse osmosis (RO) membrane system in a water treatment plant. However, biofilms have been used in water treatment systems to remove organic carbon from water via biofilters and successfully reduce biofilm growth downstream. This research investigates the possibility that the heterotrophic biofilm present on membrane surfaces removes nutrients from the treatment water, thereby making it nutrient deprived as it travels along the treatment train. This may potentially be exploited as an in situ biofilter to actively remove dissolved organic …

The Relationship Between American Media Exposure And Trinidadian Female Adolescents' Body Image Satisfaction, Clarabelle Ferguson

USF Tampa Graduate Theses and Dissertations

Numerous studies have examined the development of body image among people, especially girls and young women. Many factors have been associated with the development of body image dissatisfaction. Especially important are exposure to mass media and its relationship with three theoretical constructs: Awareness of a thin ideal, internalization of a thin ideal, and perceived pressures to be thin. Extending existing research, this study examined through experimentation the relationships among exposure to American media content and the awareness and internalization of the American norms and expectations for thinness, pressures to adopt these norms, and Trinidadian female adolescents' body image satisfaction. Based …