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Optimization Of An Advanced Water Treatment Plant: Bromate Control And Biofiltration Improvement, Dustin William Bales

USF Tampa Graduate Theses and Dissertations

The David L. Tippin Water Treatment Facility (DLTWTF) serving the city of Tampa, Florida is an advanced drinking water treatment facility consisting of coagulation/flocculation, ozonation, granular activated carbon biofiltration, and disinfection by chloramine. New regulations and the recent economic crisis pushed the facility to investigate methods to decrease costs and meet regulatory requirements easier.

The two major issues identified as priorities for investigation were the optimization of the biofiltration system and the use of a novel process to reduce the formation of bromate during ozonation.

Optimization of the biofiltration system is needed to remove more of the assorted particles that …

Bayesian Inference On Mixed-Effects Models With Skewed Distributions For Hiv Longitudinal Data, Ren Chen

USF Tampa Graduate Theses and Dissertations

Statistical models have greatly improved our understanding of the pathogenesis of HIV-1 infection

and guided for the treatment of AIDS patients and evaluation of antiretroviral (ARV) therapies.

Although various statistical modeling and analysis methods have been applied for estimating the

parameters of HIV dynamics via mixed-effects models, a common assumption of distribution is

normal for random errors and random-effects. This assumption may lack the robustness against

departures from normality so may lead misleading or biased inference. Moreover, some covariates

such as CD4 cell count may be often measured with substantial errors. Bivariate clustered

(correlated) data are also commonly encountered in …

The Effects Of Food Insecurity On Mental Wellbeing In Monteverde Costa Rica, Robert Eugene Cowherd

USF Tampa Graduate Theses and Dissertations

The rapid expansion of ecotourism in the Monteverde zone of Costa Rica has increased the incidence in food insecurity in the area. Changes in food preferences and availability have led to a more homogenized diet that is increasingly delocalized and reliant on processed foods. Additionally, there has been a rapid economic shift away from agricultural and dairy farming to an economy more reliant on tourism. This NSF supported study builds upon data from a longitudinal investigation (#BNS 0753017) examining the nutritional effects of this rapid economic transition. Using a mixed methods approach, a culturally appropriate scale of stress was developed …

Efficacy Of Increased Ube3a Protein Levels In The Brain In Rescuing The Phenotype Of An Angelman Syndrome Mouse, Jennifer L. Daily

USF Tampa Graduate Theses and Dissertations

Angelman syndrome (AS), a genetic disorder occurring in approximately one in every 15,000 births, is characterized by severe mental retardation, seizures, difficulty speaking and ataxia. The gene responsible for AS was discovered to be UBE3A and encodes an E6-AP ubiquitin ligase. A unique feature of this gene is that it undergoes maternal imprinting in a neuron-specific manner. In the majority of AS cases, there is a mutation or deletion in the maternally inherited UBE3A gene, although other cases are the result of uniparental disomy or mismethylation of the maternal gene. While most human disorders characterized by severe mental retardation involve …

Modernization From Above: Social Mobilization, Political Institutionalization And Instability: A Case Study Of Iran (1953-1979), Jeffrey Robert Cobb

USF Tampa Graduate Theses and Dissertations

This case study is in an effort to demonstrate the disastrous effects of modernization via social mobilization and economic development when initiated from above and through foreign intrusion. Initially, this research will examine previous theoretical literature regarding the political phenomenon of modernization and social mobilization. My primary focus will center on the problems that occur when rapid modernization, based on an exogenous model, is forced onto a traditional society by elites and social mobilization outpaces political institutionalization. My case study will focus on the country of Iran, as the political and societal factors of interest seem to be highly illustrative …

Impact Of Occupational Health Interventions In Indonesia, Hanifa Maher Denny

USF Tampa Graduate Theses and Dissertations

Although the Ministry of Health, Indonesia, has achieved some successful occupational health interventions, published literature on such interventions in Indonesia remains scarce.

This study utilized mixed methods of qualitative and quantitative research for the years 2010 and 2011. The qualitative study covered respondents in West, Central, and East Java Provinces to gather stakeholders' perspectives on the impact, effectiveness, adoption, implementation, maintenance, and barriers of occupational health services for informal sectors in Indonesia. The quantitative portion measured the impact of occupational health training for community health officers using Reach, Efficacy, Adoption, Implementation and Maintenance (RE-AIM) dimensions. West Java, as a province …

An Exploratory Study Of Reception Of Organizational Citizenship Behaviors And Work Related Outcomes: It Is Good For Your Co-Workers, Xinxuan Che

USF Tampa Graduate Theses and Dissertations

The predictors of organizational citizenship behavior (OCB) - performance that supports the social and psychological environment in which task performance takes place - have been studied extensively in previous research. Surprisingly, only a few studies have looked into OCB's effects on individuals who might benefit from it. The purpose of the current study was to explore effects of individual-level OCB on its recipients. Reception of OCB (ROCB) is described and proposed to be related to targets' performance, job stress and job strains. In addition, narcissism and proactive personality were explored as predictors of reception of OCB also as moderators of …

Exploring The Advance Care Planning Experiences Among Persons With Mild Cognitive Impairment: Individual And Spousal Perspectives, Catherine Parsons Emmett

USF Tampa Graduate Theses and Dissertations

Advance Care Planning has been advocated for over 20 years as a way in which individuals who are no longer able to speak for themselves, may still convey their preferences regarding a wide of array of decisions, including medical care. Advance care planning may not be initiated by individuals for many reasons, and even when initiated, may not be specific enough to help guide decision making. Recent advance care planning models have utilized disease specific information to help guide end of life health care decision-making. Persons diagnosed with mild cognitive impairment face an increased possibility of developing dementia at some …

Reciprocity And Development In Disaster-Induced Resettlement In Andean Ecuador, Albert J. Faas

USF Tampa Graduate Theses and Dissertations

This dissertation addresses gaps in anthropological knowledge about how reciprocity--and a specifically Andean form of reciprocity--works in disaster and resettlement settings. This study looks at the practices of reciprocity in a disaster-affected community (Manzano) and a disaster-induced resettlement (Pusuca) in the Andean highlands of Ecuador. Specifically, it examines two aspects of reciprocal exchange practices in these sites. It first looks at some of the factors that affect the continuity of reciprocal exchange practices, which other studies have found to play a vital role in recovery from disasters and resettlement. It then looks to the roles of unequal power relations in …

Aberrant Sialylation Alters Cardiac Electrical Signaling, Andrew Ednie

USF Tampa Graduate Theses and Dissertations

In the heart, electrical signaling is responsible for its rhythmicity and is necessary to initiate muscle contraction. The net electrical activity in a cardiac myocyte during a contraction cycle is observed as the action potential (AP), which describes a change in membrane potential as a function of time. In ventricular cardiac myocytes, voltage-gated sodium channels (Nav) and voltage-gated potassium channels (Kv) play antagonistic roles in shaping the AP with the former initiating membrane depolarization and the latter repolarizing it. Functional changes in the primary cardiac Nav isoform, Nav 1.5, or any one of the many Kv isoforms expressed in the …

Shape-Shifting Surfaces For Rapid Release And Direct Stamping Of Organized Micro-Tissues, Samuel James Dupont

USF Tampa Graduate Theses and Dissertations

The primary aim of the research in this study is to develop a robust and simple platform for the in vitro organization of cells on surfaces which facilitate rapid cell release and allows for the direct stamping of highly organized micro-tissues. Current approaches towards this goal have been very successful but are lengthy and subject cells to harsh conditions for extended periods of time raising questions regarding cell health and maintenance of physiological state. To address these concerns a platform was developed to allow for rapid cell release by utilizing a release mechanism different from previous work.

Micron-scale structures comprised …

Targeting Α4 Integrin Containing Complexes In Multiple Myeloma Using Peptidomimetics, Michael Foster Emmons

USF Tampa Graduate Theses and Dissertations

In our previous work we demonstrated that the integrin antagonist, HYD1, induced necrotic cell death in myeloma cell lines in vitro and in vivo as a single agent. In order to further delineate biomarkers of response to HYD1 we developed an isogenic drug resistant variant named H929-60. We show that the acquisition of resistance towards HYD1 correlates with reduced expression of the cleaved α4 integrin subunit and beta 1 integrin. Moreover, we demonstrate that HYD1 interacts with α4 integrin in myeloma cells. Consistent with reduced VLA-4 expression, the resistant variant showed ablated functional binding to fibronectin, VCAM-1 and the bone …

The Effect Of Tight Glycemic Control On Surgical Site Infection Rates In Patients Undergoing Open Heart Surgery, Sierra Gower

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to investigate the effects of three different glycemic control conditions (tight, conventional, and standard) in the intraoperative period on: 1) postoperative surgical site infections, and 2) postoperative procalcitonin, and C-reactive protein levels in patients undergoing open-heart surgery. Secondary aims of the study were to investigate the effects of the three glycemic treatment conditions on: 1) intraoperative blood glucose; 2) intraoperative glycemic stability; and 3) intensive care unit length of stay, in patients undergoing open-heart surgery.

An experimental design with a multilevel, single factor, within-subjects design was utilized. Patients were nested within anesthesia provider teams. …

Task Comparison Between Career Counselors And Vocational Evaluators: What's The Difference?, Jill Flansburg

USF Tampa Graduate Theses and Dissertations

This investigation compared the essential tasks of career counselors and vocational evaluators by surveying experts and practitioners in each specialization. Although both services advise persons about their work and training options, career counseling often takes place in university career centers and vocational evaluation is made available in not-for-profit settings. The null hypothesis is that there are no differences in task importance or frequency between these two jobs. Previous literature and current job descriptions from Florida workplaces are used to identify tasks, which are then presented to experts for input regarding frequency and relative importance to job performance.

Tasks endorsed by …

A Multi-Perspective Exploration Of A Cross-Age Tutoring Initiative: An Analysis Of The Responses Of All Students, Ann Elizabeth Gillies

USF Tampa Graduate Theses and Dissertations

This exploratory study assessed the effectiveness of a cross-age tutoring intervention on adaptive behavior goals of three PreKindergarten/Kindergarten-aged students with labels of autism spectrum disorder. Data were collected in an inclusive environment; the school library. Three fourth grade general education cross-age tutors were trained to use a simple, naturalistic least-to-most prompting strategy to support the young students with individualized adaptive behavior goals while in the library. A mixed method design was utilized in this study; a quantitative single case multiple baseline across participants design to show performance outcomes of the young students as a result of the tutoring intervention, and …

Unlocking The Black Box Of Policymaking: A Discursive View Of The Florida Commission On Mental Health And Substance Abuse, Ardis Hanson

USF Tampa Graduate Theses and Dissertations

Discourse creates the world of policy. Discourse plays a key role within policy formation; political discourse is made visible within particular discursive (spoken and written) practices. Hence, mental health policy is the endpoint of a discursive process and that it is, in itself, an institutional process. The shared understanding necessary to formulate policy is crucial to persons who are responsible for policy decisions and recommendations. Since the public perception is that public policy problems are too complicated for ordinary people to deal with, the policy problem is reframed into manageable "bits." It is how these "bits" are framed, named, and …

Tagline: Information Extraction For Semi-Structured Text Elements In Medical Progress Notes, Dezon K. Finch

USF Tampa Graduate Theses and Dissertations

Text analysis has become an important research activity in the Department of Veterans Affairs (VA). Statistical text mining and natural language processing have been shown to be very effective for extracting useful information from medical documents. However, neither of these techniques is effective at extracting the information stored in semi-structure text elements. A prototype system (TagLine) was developed as a method for extracting information from the semi-structured portions of text using machine learning. Features for the learning machine were suggested by prior work, as well as by examining the text, and selecting those attributes that help distinguish the various classes …

Lower Sacraments: Theological Eating In The Fiction Of C. S. Lewis, Gregory Philip Hartley

USF Tampa Graduate Theses and Dissertations

For years, critics and fans of C. S. Lewis have noted his curious attentiveness to descriptions of food and scenes of eating. Some attempts have been made to interpret Lewis's use of food, but never in a manner comprehensively unifying Lewis's culinary expressions with his own thought and beliefs. My study seeks to fill this void. The introduction demonstrates how Lewis's culinary language aggregates through elements of his life, his literary background, and his Judeo-Christian worldview. Using the grammar of his own culinary language, I examine Lewis's fiction for patterns found within his meals and analyze these patterns for theological …

"People...Do Not Come With Standardized Circumstances": Toward A Model For An Anthropology Of E-Government, Marc K. Hebert

USF Tampa Graduate Theses and Dissertations

Many Americans appreciate the availability and ease of using government websites to conduct their business with the state. What then of the most vulnerable in society? How do they access and use a standardized application process for government assistance, considering their potential resource, educational and physical constraints? Many go to public libraries and non-governmental organizations (NGOs), which shifts the responsibility to help applicants from the government agency administering the program to local actors whose primary duties lie elsewhere.

The aim of this research is to document the experiences of three groups of people, primarily located in a central Florida, urban …

Comparative Outcomes Assessment Of The C-Leg And X2 Knee Prosthesis, Michael Jason Highsmith

USF Tampa Graduate Theses and Dissertations

Background

There are more than 300,000 persons in the U.S. living with transfemoral amputation (TFA). Persons with TFA use a knee prosthesis for gait and mobility. Presently, the C-Leg microprocessor knee prosthesis is the standard of care. C-Leg has significantly improved safety and cost efficacy and has created modest gains in gait efficiency. Recently, a new prosthesis has introduced a new sensor array and processor that reportedly improves knee motion, stair function and standing stability. Early claims of the reported functional benefits of the new Genium knee (formerly X2) have not been validated in a rigorous clinical trial. Therefore, the …

Noise Exposure In Medical Helicopter Flights, Melissa Constance Hay

USF Tampa Graduate Theses and Dissertations

The purpose of this project was to evaluate noise exposures of helicopter pilots,

nurses and paramedics at a hospital by collecting area and personal samples, determining noise levels inside the helmet, and evaluating the current selection of personal protective equipment (PPE).

Measurements gathered during personal sampling were statistically analyzed and calculated using OSHA 1910.95 App A to determine dose, reference duration and the Time-Weighted Average (TWA).

Using a mannequin head, with the noise dosimeters in the ears, tests were performed on the headset inside the helmets to determine the sound pressure levels generated from the radio communications at different volume …

An Investigation Of Negative Appraisals Due To Negative Mood And How They Affect Satisfaction And Job Performance, Cristina Keiko Hudson

USF Tampa Graduate Theses and Dissertations

Ample research has investigated the relationship between non-work and work domains finding consistent links between stressors in one and strains in the other. Additionally, there exist explanatory models of these associations such as psychological/physical sickness and related absences and loss or fear of losing personal resources. The current investigation combined variables from the spillover model and Affective Events Theory to test a new model with negative mood at its core. It hypothesized marital and financial stressors lead to negative mood at home which spills over into the work domain resulting in relatively more negative appraisals of work events. Negative mood …

Community As Metaphor: Dialectical Tensions Of A Racially Diverse Organization, Joseph Jacob Jenkins

USF Tampa Graduate Theses and Dissertations

In recent years, a sense of community has declined throughout the United States. Common Point Community Church has responded to this trend by prioritizing "community" as an organizational metaphor. The present study explores how this metaphor is co-constructed through the communication practices of current organizational leaders and members. I begin this process, first, by positioning the study within existing literature on institutional theory, institutional legitimacy, community, community of practice, social construction of race, sensemaking, organizational metaphor, tension-centered approach, and dialectic theory. Building upon more than three years of ethnographic field work, I then outline the study's context and methodology. Next, …

Selling Masculinity And Profiting From Marginality: Sex Work And Tourism In A Jamaican Resort Town, Lauren C. Johnson

USF Tampa Graduate Theses and Dissertations

This ethnography explores the practice of sex tourism in Negril, Jamaica, and its sociocultural, economic, and health impacts on the popular tourist destination. Transactional sex with female tourists has become a popular income generator for some young Caribbean males who are excluded from formal employment in the region's leading industry. Like other resort locales, Negril draws both men and women from various parts of the country who choose to engage in sex work in order to benefit from the tourist dollars spent in Jamaica's third most popular resort area. Through the analysis of observations, interviews with residents, tourists, government officials, …

Increasing Parental Involvement In Early Childhood Education, Kendall Jeffries

USF Tampa Graduate Theses and Dissertations

Parental involvement during preschool has been linked with stronger pre-literacy skills, acquisition of mathematical skills, well-developed social skills, and positive attitudes toward school (Arnold, Zeljo, Doctoroff, & Ortiff, 2008; Powell, Son, File, & San Juan, 2010). Parents' active involvement in their children's learning is a recommended strategy in engaging families in children's education experiences (Henderson & Mapp, 2002). The purpose of the current study was to measure the impact of parents' active participation in a parent-directed early literacy intervention on parental home-based involvement, school-based involvement, and home-school conferencing among Head Start parents and their preschool-aged children. The study used a …

Communicating During An Organizational Crisis: Using Facebook As A Relationship Management Tool, Vjollca Hysenlika

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to determine how organizations communicate on Facebook during a crisis, from a relationship management perspective, and how their interactivity, responsiveness, and transparency affect their Fan page's relevance, importance, and appeal. In this study, the researcher conducted a controlled experiment to examine if a strategized Facebook Fan page that contained a high level of interaction, responsiveness, and transparency contributed to long-lasting relationships with fans or helped organizations recover/prevent a crisis. The researcher created eight different conditions (Facebook Fan Pages) presenting a crisis message, and recruited 200 students (25 participants per condition) from the University of …

Statistical Modeling And Analysis Of Breast Cancer And Pancreatic Cancer, Zahra Kottabi

USF Tampa Graduate Theses and Dissertations

Abstract

The object of the present study is to apply statistical modeling and estimate the mean of optimism of breast cancer patients as function of attribute variables; delay, education and age for each race of breast cancer patients. Moreover, to investigate the nonlinear association between optimism, education, age and delay with respect to each race and both. Furthermore, to develop differential equations that will characterize the behavior of the pancreatic cancer tumor size as a function of time. Having such differential equations, the mean solution of which once plotted will identify the rate of change of tumor size as a …

Being Present At Work And At Home: Can A Mindfulness-Based Intervention Reduce Work-Family Conflict?, Kaitlin M. Kiburz

USF Tampa Graduate Theses and Dissertations

Past research has found that work-family conflict is related to trait mindfulness, a unique disposition due to its amenability to change through training. This longitudinal study incorporated a mindfulness-based intervention including a mindfulness-based workshop and behavioral self-monitoring (BSM) in an attempt to reduce work-family conflict in employees. Trait mindfulness was correlated with work-family conflict across time. The intervention increased participants' trait mindfulness and decreased WIF, but did not reduce FIW. There was minimal support for the moderating roles of negative affect and perceived stress on the impact of the intervention. Overall the results provide support for the efficacy of mindfulness-based …

Semantic Feature Distinctiveness And Frequency, Katherine Marie Lamb

USF Tampa Graduate Theses and Dissertations

Lexical access is the process in which basic components of meaning in language, the lexical entries (words) are activated. This activation is based on the organization and representational structure of the lexical entries. Semantic features of words, which are the prominent semantic characteristics of a word concept, provide important information because they mediate semantic access to words. An experiment was conducted to examine the importance of semantic feature distinctiveness and feature frequency in accessing the lexical representations of young and older adults in an off-line task using features of animals. The McRae, Cree, Seidenberg, and McNorgan (2005) feature norm corpus …

Lenalidomide Targets The T-Cell Co-Stimulatory Pathway To Mediate Immune Modulation, Jessica Marie Mcdaniel

USF Tampa Graduate Theses and Dissertations

T-cells are lymphocytes that make up part of the adaptive arm of the immune system, and are essential for efficient protection from and eradication of viruses and pathogens. T-cells not only play an important role in protection from external agents, but also regulate and prevent activation towards self-peptides and detect and remove erratically growing cells. Alterations in T-cell activation and suppression contribute to auto-immunity, immunocompromised disorders, and cancer progression.

The immune system, and T-cells in particular, provides daily surveillance, recognition and destruction of aberrant cells. Although the immune system is proficient at suppressing malignant progression, tumor cells acquire various methods …