Arts and Humanities Commons^™

Chemical Investigation Of The Antarctic Marine Invertebrates Austrodoris Kerguelenensis & Dendrilla Membranosa And The Antarctic Red Alga Gigartina Skottsbergii, John Alan Maschek

USF Tampa Graduate Theses and Dissertations

The marine realm and, in particular, the Antarctic benthos is largely unexplored and understudied. The chemical investigation reported herein reveals not only the biodiversity, but how that biodiversity manifests remarkable chemical diversity. In our continuing study of the nudibranch Austrodoris kerguelenensis, we have isolated a diverse suite of diterpenoid glyceride esters, palmadorins D - S (2.32 - 2.47), one of which is the first reported halogenated diterpene from a dorid nudibranch. Utilizing genomic data from collaborators, we have investigated the chemical diversity from phylogenetically unique specimens collected in close proximity to one another. Chemical groupings based on comparison of LC/MS …

Cold War Playboys: Models Of Masculinity In The Literature Of Playboy, Taylor Joy Mitchell

USF Tampa Graduate Theses and Dissertations

"Cold War Playboys: Models of Masculinity in the Literature of Playboy" emphasizes the literary voices that emerged in response to the Cold War's redefinitions of space and sexuality and, thus, adds to the growing national discourse of Cold War literary and masculinity studies. I argue that the literature Playboy includes has always been a necessary feature to creating its masculinity model; however, that very literature often destabilizes the magazine's grand narrative because it presents readers with alternative models of masculinity. To make that argument, I presume five things: 1) masculinity, like femininity, is a construct; 2) the mid-century masculinity …

Translation And Adaptation Of The Center For Epidemiologic Studies-Depression (Ces-D) Scale Into Tigrigna Language For Tigrigna Speaking Eritrean Immigrants In The United States, Mulubrhan Fisseha Mogos

USF Tampa Graduate Theses and Dissertations

Depression is one of the oldest known mental health conditions. It is acknowledged to be a global health problem that affects people from any culture or ethnic group. The prevalence of depression widely varied across countries and cultures. The cross-cultural relevance of the concept of depression, its screening or diagnosis, and cultural equivalence of items used to measure symptoms of depression has been area of research interest. Differences in prevalence rates in depression have been suggested as being due to research artifacts, such as use of instrument developed for one culture to another culture. With the current trend of globalization …

Seasonal Changes In The Sinking Particulate Flux And In The Nitrogen Cycle Within The Euphotic And Twilight Zones Of The Cariaco Basin, Venezuela, Enrique Montes-Herrera

USF Tampa Graduate Theses and Dissertations

This study explored the effects of seasonal variability on the geochemistry of sinking pthesiss and on the nitrogen cycle of the Cariaco Basin. Pthesis fluxes were measured at the base of the euphotic zone (the depth of 1% of photosynthetically active radiation - PAR) with drifting sediment traps during months of upwelling and non-upwelling regimes from March 2007 to November 2009. Flux estimates were analyzed in the context of seasonal variations in sea surface temperature, primary productivity, and chlorophyll a concentrations using data generated by the CARIACO Time-series Program as well as satellite data. Additionally, nine years (1996-2000 and 2004-2007) …

Urbanization And Land Surface Temperature In Pinellas County, Florida, Bruce Coffyn Mitchell

USF Tampa Graduate Theses and Dissertations

Since the early 1800's, many studies have recognized increased heat in urban areas, known as the urban heat island (UHI) effect, as one of the results of human modification to the natural landscape. UHI is related to differences in land surface temperature (LST) between rural areas and urban areas where factors of the built environment such as the thermodynamic capacities of materials, structural geometry, and heat generating activities cause increased storage and re-radiation of heat to the atmosphere. This thesis examines the correlation between factors of urbanization and differences in land surface temperature (LST) in the subtropical climate of Pinellas …

Parametric And Bayesian Modeling Of Reliability And Survival Analysis, Carlos A. Molinares

USF Tampa Graduate Theses and Dissertations

The objective of this study is to compare Bayesian and parametric approaches to determine the best for estimating reliability in complex systems. Determining reliability is particularly important in business and medical contexts. As expected, the Bayesian method showed the best results in assessing the reliability of systems.

In the first study, the Bayesian reliability function under the Higgins-Tsokos loss function using Jeffreys as its prior performs similarly as when the Bayesian reliability function is based on the squared-error loss. In addition, the Higgins-Tsokos loss function was found to be as robust as the squared-error loss function and slightly more efficient. …

In The Midst Of Organizational Change: A Survey Of Employee Perceptions Toward Separate Accreditation For Regional Campuses At The University Of South Florida, Rhonda S. Moraca

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to identify how employees in the University of South Florida System (USF System) perceived changes in their organizations and the system as a result of having separate accreditation for each campus in the USF System. This survey research provided a "snapshot" of employee perceptions at a particular point in time. The study was unique because it provided a picture of the perceptions of employees while each campus was at a different point in the organizational change process. The theoretical concept from Bolman and Deal's (2003) four frame theory was used to develop the dependent …

Investigation Of The Optimal Dissolved Co2 Concentration And Ph Combination For The Growth Of Nitrifying Bacteria, Raymond Anthony Morris

USF Tampa Graduate Theses and Dissertations

Ammonium (NH₄⁺) is a biological nutrient that is transformed in a wastewater treatment plant (WWTP) in a process called activated sludge. This is accomplished in an aerobic environment using microorganisms and inorganic carbon that convert the ammonium to nitrate (NO₃^-). This process is termed nitrification. Removal of ammonium is necessary due to its oxygen demand and toxicity to the environment.

Nitrification is considered a slow process due to the slow growth rate of the nitrifying bacteria. Ammonia oxidizing bacteria (AOB) first covert the ammonium (NH₄⁺) to nitrite (NO₂^-) …

Guided By The Spirit: Understanding Student Behavior And Theological Philosophy Through The Lens Of Secondary Catholic School Teachers, Angela Marie Mucci

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to examine how secondary Catholic school teachers perceived problem behavior exhibited by students with or without disabilities based on their theological philosophy. Using the methods identified in grounded theory, seven secondary Catholic school teachers were interviewed to gain an understanding of the extent to which a theological philosophy was reflected in their perceptions, responses, and policies towards behavior challenges/problems. In order to conceptualize and contextualize the notion of a "theological philosophy," this study utilized three tenets of Catholic Social Teaching (dignity of the human person, common good, and preferential option for the poor and …

Nurse Manager Emotional Intelligence As A Predictor To Registered Nurse Job Satisfaction And Rn Perceptions Of The Practice Environment And The Relationship To Patient, Nursing And Hospital Outcomes, Jacqueline Cecilia Munro

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to determine if the level of Nurse Manager (NM) emotional intelligence (EI) predicted registered nurse (RN) job satisfaction and RN perceptions of the practice environment. In addition, relationships to patient, nursing, and hospital outcomes were explored. Participants included RNs (N=659) and NMs (N=38) from 53 nursing units at eight hospitals located in the southeast region of the United States. A cross-sectional, correlational research design was used to test the hypotheses. Pearson product-moment correlation coefficients, simple linear and multiple regression statistics were conducted to analyze the data. Level of NM EI had a positive, not …

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 …

Effectiveness Of In-Line Chlorination Of Gravity Flow Water Supply In Two Rural Communities In Panama, Kevin Orner

USF Tampa Graduate Theses and Dissertations

It is well established that water quality is directly linked to health. In-line chlorination is one technology that can be used in the developing world to potentially inactivate pathogens and improve water quality. The purpose of this study was to determine the effectiveness of the Panamanian Ministry of Health's in-line PVC chlorinator under three different operating conditions in a rural water supply system. Free and total chlorine were measured entering the storage tank, leaving the storage tank, and at three households along the transmission line of the water system in the two rural indigenous communities of Calabazal and Quebrada Mina …

Catalytic Hydrodehalogenation And Hydrogenation Of Halogenated Aromatic Organic Contaminants For Application To Soil Remediation, Claire J. Osborn

USF Tampa Graduate Theses and Dissertations

The objective of this research was to aid in the development of a new method for removing and destroying soil contaminants. In particular, 1,2,4,5-tetrachlorobenzene (TeCB) was selected for this research. Hydrodehalogenation (HDH) was paired with hydrogenation for remedially destroying TeCB without generating a secondary waste stream in a single batch reactor. Palladium- and rhodium-catalyzed HDH and hydrogenation were applied in a batch reactor at room temperature and moderate hydrogen pressure. Cyclohexane was formed as an end product with benzene as an intermediate reactant.

An analytical method was developed to measure TeCB, benzene, and cyclohexane in a solution of water and …

Crystal Engineering Of Molecular And Ionic Cocrystals, Tien Teng Ong

USF Tampa Graduate Theses and Dissertations

Solubility enhancement of poorly-soluble active pharmaceutical ingredients (APIs) remains a scientific challenge and poses a practical issue in the pharmaceutical industry. The emergence of pharmaceutical cocrystals has contributed another dimension to the diversity of crystal forms available at the disposal of the pharmaceutical scientist. That pharmaceutical cocrystals are amenable to the design principles of crystal engineering means that the number of crystal forms offered by pharmaceutical cocrystals is potentially greater than the combined numbers of polymorphs, salts, solvates and hydrates for an API. The current spotlight and early-onset dissolution profile ("spring-and-parachute" effect) exhibited by certain pharmaceutical cocrystals draw attention to …

Environmental Health In The Latin American And Caribbean Region: Use Of Water Storage Containers, Water Quality, And Community Perception, Erlande Omisca

USF Tampa Graduate Theses and Dissertations

Water quality and availability are important issues in many developing countries where portions of populations still lack access to potable water. Throughout the English-speaking Caribbean and parts of Latin America, households and businesses invest in water supply systems even when they are connected to and pay for water services from a private or state owned provider. Inconsistent supplies of water from the water companies have led many people to invest in storage tanks which, if operated correctly, can provide water throughout the day even when the supply from the main is low or zero. While these individual systems help to …

Geometric Transformations In Middle School Mathematics Textbooks, Barbara Zorin

USF Tampa Graduate Theses and Dissertations

This study analyzed treatment of geometric transformations in presently available middle grades (6, 7, 8) student mathematics textbooks. Fourteen textbooks from four widely used textbook series were evaluated: two mainline publisher series, Pearson (Prentice Hall) and Glencoe (Math Connects); one National Science Foundation (NSF) funded curriculum project textbook series, Connected Mathematics 2; and one non-NSF funded curriculum project, the University of Chicago School Mathematics Project (UCSMP).

A framework was developed to distinguish the characteristics in the treatment of geometric transformations and to determine the potential opportunity to learn transformation concepts as measured by textbook physical characteristics, lesson narratives, and analysis …

An Examination Of The Impacts Of Urbanization On Green Space Access And Water Resources: A Developed And Developing World Perspective, Heather E. Wright Wendel

USF Tampa Graduate Theses and Dissertations

This dissertation addresses the impact of urbanization and land use change on the availability and accessibility of two urban amenities that are often inequitably distributed: green space and water features. Diverse methodologies were utilized in order to gain a better understanding of the role of these amenities in improving urban quality of life and integrated water management. Using an interdisciplinary approach, this research provides a unique perspective within both a developed and developing world context by evaluating aspects of urbanization to emphasize more sustainable and integrated approaches to development.

A preliminary analysis highlights potential drivers of green space revitalization in …

Surface Functionalization And Analysis Thereof For An Ovarian Cancer Diagnostic Biosensor, Asad Ali Ahmad

USF Tampa Graduate Theses and Dissertations

Ovarian cancer is the fifth leading cause of cancer death among women in United States and has an alarming 1.4% (1 in 71) lifetime risk. The lack of overt symptoms and the absence of a reliable screening test to detect ovarian cancer result in over 70% of women being diagnosed after the disease has spread beyond the ovary resulting in a poor prognosis. A key characteristic of ovarian cancer is the ability of tumor cells to evade apoptosis, or programmed cell death contributing to the limitless replicative potential, which is a hallmark of all carcinogenesis. There is conclusive evidence that …

Advances In Fiber Reinforced Polymer Repair Incorporating Cathodic Protection, Julio Ivan Aguilar

USF Tampa Graduate Theses and Dissertations

This dissertation presents findings from two disparate research projects relating to the cathodic protection (CP) of piles supporting bridge elements. The first was a proof of concept study for developing a new hybrid pile repair system incorporating embedded sacrificial zinc anodes within a fiber reinforced polymer (FRP) wrap. The second was to develop and remotely monitor the performance of magnesium anodes protecting steel Hpiles supporting two bridges in Florida.

The hybrid FRP-CP system involved a proof-of-concept laboratory study to refine pressure / vacuum bagging systems for pile repair and to quantify the improvement in the FRP concrete bond. Two different …

Validation Of The Usf Safe Exposure Time Equation For Heat Stress, Arden Bruce Andersen

USF Tampa Graduate Theses and Dissertations

Heat stress conditions are prevalent in the working environment around the world. Often they are not readily engineered out. Administrative controls and, in extreme/toxic environments, personal protective gear are the means available to protect workers. For every combination of metabolic work rate, clothing ensemble and environmental WBGT, there is a time of exposure threshold, beyond which the worker can no longer compensate for the heat stress, and signs and symptoms of heat strain appear. Increasingly, worker environments require specialty clothing either for worker protection or to maintain a clean/sanitary environment. Prior to the publication of the USF safe exposure time …

Contextualizing Hiv/Aids Prevention And Treatment Programs In Zanzibar, Tanzania, Naheed Ahmed

USF Tampa Graduate Theses and Dissertations

International aid organizations and wealthy nations have contributed billions to combat the spread and treatment of HIV/AIDS in sub-Saharan Africa; however, these programs have been critiqued for not addressing the socioeconomic and cultural context of the epidemic, instead relying upon generalized approaches. The prevalence rate in Zanzibar, Tanzania is low in the general population, but high among vulnerable segments of Zanzibari society, resulting in interventions focusing on particular groups (e.g. sex workers, drug users, and men who have sex with men). Through interviews with government agencies, non-profit organizations, medical professionals, vulnerable populations, and HIV/AIDS patients, this paper examines how local …

Use Of Innovative Computer Technology And Optical Texture Properties In The Analysis Of Pavement Digital Images, Saumya Priyadari Amarasiri

USF Tampa Graduate Theses and Dissertations

Digital image based automated pavement crack detection and classification technology has seen vast improvements in the recent years. In spite of these developments, although pavement crack lengths and widths can be evaluated using state-of-the-art software with a reasonable accuracy, no reported evidence is found in extending this technology to evaluate crack depths. Hence a preliminary study was carried out to model the digital image formation of cracked concrete pavements based on the Bidirectional Reflection Distribution Function. It was revealed that a definitive theoretical relationship exists among the crack widths and depths and the maximum pixel intensity contrasts in the images …

The State And The Legalization Of Dual Citizenship/Dual Nationality: A Case Study Of Mexico And The Philippines, Pamela Kim Anderson

USF Tampa Graduate Theses and Dissertations

The purpose of this paper is to address the question of how does the inclusion or exclusion of political participation with dual citizenship or dual nationality impact the Philippines' and Mexico's efforts to achieve the economic and political benefits of dual citizenship from their citizens?

The hypothesis of the paper states that that if a sending state offers legal dual citizenship/nationality with political participation, then it will be successful at increasing the economic and political benefits provided by its emigrants; but if a sending state only offers legal dual citizenship/nationality without political participation than it will not be successful at …

Analyses Of Variable Refrigerant Flow And Exergy In Air Conditioning Systems, Rashid Ali Alshatti

USF Tampa Graduate Theses and Dissertations

This thesis consists of two research problems in the air conditioning (A/C) area. For the first problem, the aim is to model and simulate a variable refrigerant flow (VRF) air conditioning system. The coefficient of performance (COP) for refrigeration or heat pump system is one of the critical parameters for designing an air conditioning system. The modeling of the system components for a VRF cycle under different cooling conditions using R-134a and R-22 as refrigerants was carried out. Calculations were performed by varying different parameters such as condenser and evaporator temperatures, and refrigerant type. The R-134a refrigerant shows a better …

Sol-Gel Resorcinarene Sorbent For Capillary Microextraction Coupled To Gas Chromatography, Abdullah Awadh Alhendal

USF Tampa Graduate Theses and Dissertations

For the first time, octahydroxyl methylresorcinarene with four hexyl groups on the lower rim was utilized in the in-situ preparation of a silica-based sol-gel organicinorganic hybrid coating for sample preconcentration by capillary microextraction (CME). Tetraethoxysilane (TEOS) was chosen as a sol-gel precursor to create a crosslinked sol-gel network via acid-catalyzed hydrolytic polycondensation reactions. Sol-gel chemistry helped in the in situ preparation of resorcinarene-containing extraction phase in the form of a surface coating. It also provided an effective means to chemically bind the coating to the inner surface of fused silica capillary via condensation of the hydroxyl groups in the sol-gel …

Perceptions By Heartland Educational Consortium (H.E.C.) Elementary Title I School Principals And Assistant Principals: Data Use In Their Role As Achievement-Related Decision Makers, Sherri Albritton

USF Tampa Graduate Theses and Dissertations

In the age of accountability and assessment, there is a need to ensure that data provided regarding student achievement can be effectively and appropriately utilized by school site administrators in a systematic way to improve student achievement.

This study identified Heartland Educational Consortium Title I principals’ and assistant principals’ perceptions of their use of data as decision-makers in raising student achievement, with primary emphasis on Florida’s Differentiated Accountability Model.

Quantitative results revealed statistically significant differences in data use by administrators. Use of data by administrators for professional development was statistically significantly different from school improvement, leadership, or data skills. Data …

A Case Study Of Adolescent Females' Perceptions Of Identity In An After-School Book Club, Holly Atkins

USF Tampa Graduate Theses and Dissertations

Reading is a perennial educational hot topic - but now extends for beyond early literacy to the secondary level. Reading researchers are growing in our knowledge of how to reach and teach struggling adolescent readers yet too often success in literacy is measured solely by performance on standardized tests. Literacy is seen on one hand as a one-dimensional set of skills students need to possess to be successful in school and their future workplaces. A more expansive view of the importance of literacy and what it means to adolescent females' growth as individuals and members of communities is needed.

This …

Modeling Of Solar-Powered Single-Effect Absorption Cooling System And Supermarket Refrigeration/Hvac System, Ammar Bahman

USF Tampa Graduate Theses and Dissertations

This thesis consists of two different research problems. In the first one, the aim is to model and simulate a solar-powered, single-effect, absorption refrigeration system using a flat-plate solar collector and LiBr-H₂O mixture as the working fluid. The cooling capacity and the coefficient of performance of the system are analyzed by varying all independent parameters, namely: evaporator pressure, condenser pressure, mass flow rate, LiBr concentration, and inlet generator temperature. The cooling performance of the system is compared with conventional vapor-compression systems for different refrigerants (R-134a, R-32, and R-22). The cooling performance is also assessed for a typical year …

Identification And Characterization Of The Human Herpesviruses 6a And 6b Genome Integration Into Telomeres Of Human Chromosomes During Latency, Jesse Herbert Arbuckle

USF Tampa Graduate Theses and Dissertations

While the latent genome of most Herpesviruses persists as a nuclear circular episome, previous research has suggested that Human Herpesvirus 6 (HHV-6) may integrate into host cell chromosomes, and be vertically transmitted in the germ-line. Because the HHV-6 genome encodes a perfect TTAGGG telomere repeat array at the right end direct repeat (DR_R) and an imperfect TTAGGG repeat at the end of the left end direct repeat (DR_L), we established a hypothesis that during latency, the HHV-6A and HHV-6B genome integrates into the telomeres of human chromosomes through homologous recombination with the n(TTAGGG) viral repeats, and …

The Relationships Between Frontal Alpha Asymmetry, Mood, And Emotional Memory, Ross Avila

USF Tampa Graduate Theses and Dissertations

Frontal alpha asymmetry is often used as a metric to compare activation between homologous frontal brain sites. A positive asymmetry refers to greater activation in the left hemisphere than in the right hemisphere, while the opposite is true of negative asymmetries. Two expansive but largely separate bodies of research have examined the relationships between (1) frontal asymmetry scores and mood, and (2) mood and emotional memory performance. Specifically, one body of research has found that positive moods are associated with positive asymmetries while negative moods are associated with negative asymmetries. A second body of literature has examined the effects of …