Digital Commons Network^™

Pathogenic Mechanisms And Signaling Pathways In Plasmodium Falciparum, Jennifer L. Sedillo

USF Tampa Graduate Theses and Dissertations

Plasmodium falciparum is a human intracellular parasite that is the causative agent of a deadly form of malaria. This species alone is responsible for 200 million cases of malaria annually resulting in over 1 million deaths worldwide. The excessive mortality due to P. falciparum infection is due to its ability to cause severe pathogenesis through hyperparasitemia and cytoadherence defined as the ability of infected red blood cells to adhere to host vasculature. Cytoadherence is mediated through the export of parasite proteins to the surface of the infected red blood cell (RBC). Exported proteins have been identified but the pathway for …

Taken For Granted Or Taken With Gratitude? An Examination Of The Differential Effects Of Donations Of Time And Money On Consumers' Evaluation Of Corporate Philanthropy, Ryan Langan

USF Tampa Graduate Theses and Dissertations

This dissertation examines the potential for two forms of corporate philanthropy, donations of time and money, to have differential effects on consumers' response to corporate giving. Drawing upon indirect-reciprocity theory I show that corporate donations of time compared to money elicit a greater desire to reciprocate on the part of consumers. It is found that the influence of corporate donations on consumers' desire to reciprocate occurs through serial mediation, whereby donations of time are perceived as being more effortful than monetary donations. This in turn leads to more altruistic motive attributions, and ultimately greater admiration towards the firm and a …

Exploring The Energy Link Between Emotion Regulation At Work And Health Behaviors, Ryan Christopher Johnson

USF Tampa Graduate Theses and Dissertations

The present study explores the process through which the regulation of emotions at work, also known as emotional labor, depletes self-regulatory resources, specifically energy, and distally impacts health behaviors in the form of less physical activity and more unhealthy eating. Differences in relationships between two forms of emotional labor, surface acting and deep acting, as well as differences between psychological and physical energy depletion, are explored. Additionally, the roles of trait mindfulness and future temporal focus are examined as between-individual differences moderating the proposed relationships.

Multi-level analysis of daily diary data collected from participants (N = 108 participants) over ten …

Documenting Elementary Teachers' Sustainability Of Instructional Practices: A Mixed Method Case Study, Bridget Cotner

USF Tampa Graduate Theses and Dissertations

School reform programs focus on making educational changes; however, research on interventions past the funded implementation phase to determine what was sustained is rarely done (Beery, Senter, Cheadle, Greenwald, Pearson, et al., 2005). This study adds to the research on sustainability by determining what instructional practices, if any, of the Teaching SMART[reg] professional development program that was implemented from 2005-2008 in elementary schools with teachers in grades third through eighth were continued, discontinued, or adapted five years post-implementation (in 2013). Specifically, this study sought to answer the following questions: What do teachers who participated in Teaching SMART[reg] and district administrators …

Obesity And Dining Out: An Exploration Of Dietary Trends In Urban Malaysia, Sylvia S. Lim

USF Tampa Graduate Theses and Dissertations

Economic growth has spurred rapid urbanization in Malaysia and triggered changes in diet, lifestyle, and disease trends. National studies show that a third of Malaysia's population is overweight/obese while household expenditures on dining out grow. In metropolitan Kuala Lumpur (KL), residents navigate concepts of nutrition, body weight, and health as they dine out. Using the biocultural framework, this study examined links between body weight, diet, income, street food consumption, and nutritional knowledge through the perspectives of consumers and vendors. Altogether, 77 participants were recruited for this three-phase research. In the first phase, a survey was administered to 60 participants recruited …

Synthesis And Evaluation Of 3-Aryl-4(1h)-Quinolones As Orally Active Antimalarials: Overcoming Challenges In Solubility, Metabolism, And Bioavailability, Andrii Monastyrskyi

USF Tampa Graduate Theses and Dissertations

Infectious diseases are the second leading cause of deaths in the world with malaria being responsible for approximately the same amount of deaths as cancer in 2012. Despite the success in malaria prevention and control measures decreasing the disease mortality rate by 45% since 2000, the development of single-dose therapeutics with radical cure potential is required to completely eradicate this deadly disease. Targeting multiple stages of the malaria parasite is becoming a primary requirement for new candidates in antimalarial drug discovery and development. Recently, 4(1H)-pyridone, 4(1H)-quinolone, 1,2,3,4-tetrahydroacridone, and phenoxyethoxy-4(1H)-quinolone chemotypes have been shown to be antimalarials with blood stage activity, …

Religiosity, Spirituality, And Depressive Symptoms In Older Adults In An Active Living Community, Monica D'Adrianne Solomon

USF Tampa Graduate Theses and Dissertations

The population of older adults in the United States is steadily rising. The Centers for Disease Control and Prevention (CDC) recently released a call to reduce mental distress in older adults. Research shows that mental distress is associated with depressive symptoms, which are significantly related to many chronic medical conditions, functional impairment, suicide, and all-cause mortality. Depression is a major public health concern. There is an interest in gerontology research on the buffering role of engagement against depressive symptoms such as volunteering, social activities, and religion. Certain religious beliefs and behaviors contribute to maintaining or improving mental health and research …

Recreational Segregation: The Role Of Place In Shaping Communities, Iyshia Michelle Lowman

USF Tampa Graduate Theses and Dissertations

Institutionalized racial segregation in the United States has had a significant impact on many aspects of American culture. Segregation was practiced in every aspect of public life, even in areas of recreation. For those labeled as "nonwhite," even going to the beach was legally restricted. The events between the 1950s and 1960s at Homestead Bayfront Beach in Homestead, Florida are evidence that social stratification based on the social categorization of race has a significant effect even today. This research examines how legalized segregation in the past impacted society and contributed to the development of a place and identity at Homestead …

Molecular Evidence For Vector Implication Of Onchocerca Lupi In Los Angeles County, Ca, Shanna June Bolcen

USF Tampa Graduate Theses and Dissertations

Onchocerca is a genus of roundworm most commonly associated with the human infection onchocerciasis, or river blindness. While typically a zoonotic infection of ungulate populations, canine cases (Onchocerca lupi) have been identified in the United States and Greece. In 2012, Los Angeles County, Veterinary Public Health Program identified 3 cases of Onchocerca spp. infections in domestic canines. Samples from the ensuing blackfly collections were sent to the Global Health Infectious Disease Research Unnasch Laboratory for parasite isolation and vector species identification. Species-specific primers were designed and optimized for O. lupi using a non- specific cytochrome oxidase (COI) gene target (689bp) …

Neural Correlates Of Spectral, Temporal And Spectro-Temporal Modulation, Anusha Mohan

USF Tampa Graduate Theses and Dissertations

Natural sounds are characterized by the distribution of acoustic power over different frequency regions and/or time. This is termed spectral, temporal or spectro-temporal modulation. The auditory system is equipped with banks of filters tuned to different spectral, temporal and spectro-temporal modulation frequencies (SM, TM, STM). The sensitivity of the peripheral system to these modulations can be measured by undertaking a linear systems approach. In addition to understanding the psychophysical sensitivity, studying the neural patterns of their processing is also critical. The current study is an attempt to understand the relationship between the behavioral and neural correlates of spectral, temporal and …

The Hypertrophic Effects Of Practical Vascular Blood Flow Restriction Training, John Francis O'Halloran

USF Tampa Graduate Theses and Dissertations

Practical blood flow restriction training is a new training technique that has the potential to increase muscular hypertrophy and muscular strength while allowing practitioners to train with lighter loads (20-30% of 1-RM). Through the use of elastic knee wraps, the limbs can be restricted using a perceived pressure scale. The comparison of practical blood flow resistance training with traditional, non-blood flow restricted resistance training and its effects on muscular hypertrophy and strength has not been investigated.

Twenty-one resistance-trained males participated in a 4-week training program and were randomly assigned to one of two groups: Practical BFR training (BFR; n = …

The Effects Of Systematic Reinforcement On Academic Performance In Precision Teaching: An Investigation Of Acquisition, Retention, And Endurance, Victoria Ann Hoch

USF Tampa Graduate Theses and Dissertations

The use of positive reinforcement in acquisition programming is a hallmark of Applied Behavior Analysis; however, the Precision Teaching literature reveals a lack of reporting on the use of reinforcement. The present study utilized a groups design and single case analyses to investigate the effect of programming systematic tangible reinforcement on acquisition performance, retention and endurance of academic skills with 10 typically developing students ranging from 5-7 years of age. Results indicate that for both control and experimental participants, an increase in accuracy on both See/Say sight words and math problems occurred; however, the experimental group performed better on See/Say …

Using Contingency Mapping To Decrease Problem Behavior And Increase Social Communication Skills In Children With Autism, Diana Carolina Sanguino

USF Tampa Graduate Theses and Dissertations

Abstract

Social communication skills play a central role in the developmental outcomes for young children with autism. Due to deficits in social communication skills, many young children with autism develop problem behavior. Providing these children with the right tools to communicate properly may decrease their problem behavior. This study examines the impact of contingency mapping intervention on problem behavior and functional communication skills in three children with autism, using a multiple-baseline design. Before implementation of contingency mapping, verbal contingency was implemented in the first phase of intervention, which was associated with minimal increases in communication skills and decreases in problem …

Using Auditory Feedback To Improve The Performance Of Judokas During Uchi Komi, Taylor Easton Ferguson

USF Tampa Graduate Theses and Dissertations

Auditory feedback has been shown to be highly effective at teaching new skills to athletes in a variety of sports. This method consists of targeting a routine, breaking down the specific skills required to complete the routine, and training an individual on those skills using an auditory device to provide feedback on correct responses. This study evaluated the effectiveness of auditory feedback for improving a judo technique. One set of techniques taught in judo are standing throws, which require a partner to receive the technique (uke.) These throws require specific skills to successfully implement the technique. Auditory feedback was evaluated …

Human Trafficking From Southern Mexico, Honduras, El Salvador, And Guatemala: Why These Victims Are Trafficked Into Modern Day Florida, Timothy Adam Golob

USF Tampa Graduate Theses and Dissertations

Florida is ranked as one of the United States' top three destination states for human trafficking; many of those victims originate from Mesoamerica--Southern Mexico, Guatemala, Honduras, and El Salvador. Human trafficking is a growing problem which hinders universal human rights for hundreds of new victims in Florida every year. Mesoamericans have a high risk of becoming victims due to the situations in their home countries. The issue of human trafficking has only recently gained the national and state attention of law makers and law enforcement officers.

This study uses several human trafficking cases to educate and exemplify why Mesoamerican victims …

Karenia Brevis Harmful Algal Blooms: Their Role In Structuring The Organismal Community On The West Florida Shelf, Alisha Marie Gray

USF Tampa Graduate Theses and Dissertations

Karenia brevis dinoflagellate blooms off the west coast of Florida can create devastating effects on marine communities when they release a neurotoxin known as a brevetoxin. These blooms, informally referred to as red tides, can cause massive fish kills, necessitate closures of shellfish fisheries, and can even leave lingering toxins that impact shelf communities long after the bloom has dissipated. As a result, much effort has been put into studying K. brevis bloom initiation and dynamics. However, how K. brevis blooms impact Florida's fisheries is not fully understood because the relationship between K. brevis cell counts and fish mortality is …

The Black Experience In The United States: An Examination Of Lynching And Segregation As Instruments Of Genocide, Brandy Marie Langley

USF Tampa Graduate Theses and Dissertations

Abstract

This thesis analyzes lynching and segregation in the American South between the years 1877 and 1951. It argues that these crimes of physical and social violence constitute genocide against black Americans, according to the definitions of genocide proposed by Raphael Lemkin and then the later legal definition adopted by the United Nations. American law and prevailing white American social beliefs sanctioned these crimes. Lynching and segregation were used as tools of persecution intended to keep black people in their designated places in a racial hierarchy in the United States at this time period. These crimes were two of many …

Digital Modeling And Non-Destructive Technological Examination Of Artifacts And Safety Harbor Burial Practices At Picnic Mound 8hi3, Hillsborough County, Florida, James Bart Mcleod

USF Tampa Graduate Theses and Dissertations

This project reexamines field notes and artifacts from a Works Progress Administration excavation of the Picnic Mound (8Hi3), a Safety Harbor-period burial mound located in Hillsborough County, Florida. The goals are to reconstruct burial practices digitally using a Geographic Information Systems approach to test Ripley Bullen's model of Woodland and Safety Harbor burial practices, and demonstrate ways that modern technologies can be used to provide new information from past investigations. This thesis also presents new information from a pXRF study about prehistoric ceramic manufacturing in the Tampa Bay area, and discusses additional archaeological resources associated with the Picnic Mound. This …

Sigma Factor N: A Novel Regulator Of Acid Resistance And Locus Of Enterocyte Effacement In Escherichia Coli O157:H7, Avishek Mitra

USF Tampa Graduate Theses and Dissertations

In enterohemorrhagic E. coli (EHEC) sigma factor N (σ^N) regulates glutamate-dependent acid resistance (GDAR) and the locus of enterocyte effacement (LEE), discrete genetic systems required for transmission and virulence of this intestinal pathogen. Regulation of these systems requires nitrogen regulatory protein C, NtrC, and is a consequence of NtrC/σ^N-dependent reduction in the activity of sigma factor S (σ^S). This study elucidates pathway components and stimuli for σ^N-directed regulation of GDAR and the LEE in EHEC. Deletion of fliZ, the product of which reduces σ^S activity, phenocopies rpoN (σ^N) …

Trends And Costs Of Industry-Related Injuries In The United States [1998 - 2009], Delphine Fontcha

USF Tampa Graduate Theses and Dissertations

In order to describe the trend, characteristics, and cost of occupational injuries that occurred in industrial settings across the United States between 1998 and 2009, a cross sectional analysis based on hospital discharge data was conducted. The National Inpatient Sample (NIS) data from the Healthcare and Cost Utilization Project (HCUP)(1) was used. Identification of relevant injuries from the sample was performed using the International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9 CM) code E849.3 (industrial place and premises)(8).

A total of 307,586 (weighted) patients with industrial related injuries were discharged from hospitals in the United States during the period …

Water Availability As The Driving Factor Of Growth And Physiological Function Of Co-Occurring Scrub Species In Central Florida, Tammy Foster

USF Tampa Graduate Theses and Dissertations

Florida scrub is a xeromorphic upland shrub community dominated by evergreen oaks that resprout after fire, occurring on moderately to excessively well-drained nutrient-poor sand. Scrub is home to several threatened and endangered animal species (e.g., Florida scrub-jay, gopher tortoise, and indigo snake) and rare and endemic plants. Urban development and agriculture has greatly reduced and fragmented scrub habitat, and because of this Florida scrub is considered one of the most endangered ecosystems in the United States. Climate change is a further threat to Florida scrub. Under a warmer and drier climate, scrub species will be exposed to more frequent and …

Reflections In The Classroom: Perspectives On Teaching For Social Justice From Secondary Social Studies Educators, Gregory Lee Samuels

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to describe and explain the perspectives of five secondary social studies educators who identified with teaching for social justice. The following research questions guided the study: How do educators who identify with social justice perceive teaching for social justice?; In what ways do educators who identify with social justice facilitate a social justice education?; What experiences prompt educators to teach for social justice in the classroom?; In what ways are educators challenged and rewarded while facilitating a social justice curriculum within the secondary social studies classroom? This qualitative study employed semi-structured interview questions and …

Elective Early Term Delivery And Adverse Infant Outcomes In A Population-Based Multiethnic Cohort, Jason Lee Salemi

USF Tampa Graduate Theses and Dissertations

The length of human pregnancy, arguably the most natural of physiological processes, is undergoing subtle but consequential modification in order to adapt to modern societal demands. The gestational age distribution of births in the United States has been shifting to lower gestational ages over the past two decades, parallel to a concomitant rise in obstetrical intervention in pregnancy. The result has been an increase in elective deliveries at 37-38 weeks (early term).

A population-based retrospective cohort study of over 616,000 live-born full-term singleton infants was conducted to investigate the association between elective early term delivery and subsequent infant morbidity, mortality, …

Statistical And Prognostic Modeling Of Clinical Outcomes With Complex Physiologic Data, Monica A. Puertas

USF Tampa Graduate Theses and Dissertations

Laboratory tests are a primary resource for diagnosing patient diseases. However, physicians often make decisions based on a single laboratory result and have a limited perspective of the role of commonly-measured parameters in enhancing the diagnostic process. By providing a dynamic patient profile, the diagnosis could be more accurate and timely, allowing physicians to anticipate changes in the recovery trajectory and intervene more effectively.

The assessment and monitoring of the circulatory system is essential for patients in intensive care units (ICU). One component of this system is the platelet count, which is used in assessing blood clotting. However, platelet counts …

Lead (Pb) Contamination Of Water Drawn From Pitcher Pumps In Eastern Madagascar, David Bradlee Akers

USF Tampa Graduate Theses and Dissertations

Access to safe water supply--a major determinant of public health--is less than 50% in Madagascar, and access to piped, treated water remains out of reach financially for many in the urban and peri-urban areas where available. The Self-supply option of the Pitcher Pump has been meeting the need for household water in coastal areas of Madagascar since the early 1960s and has proven a sustainable option for many. These pumps make use of leaded components in the construction, however, which may pose a health risk for heavy metal intoxication and therefore cause the water to be unsafe for drinking and …

Characterization Of Iron Response In Gynecological Cell Lines, Kyle A. Bauckman

USF Tampa Graduate Theses and Dissertations

Ovarian carcinoma afflicts over 22,000 women each year with a 5 year survival rate of only 18% for stage IV patients [23]. Current treatment options are limited due to high rates of drug resistance and recurrence. Further, the identity of "precursor lesions" which give rise to various subclasses of epithelial ovarian cancer has been evasive. This is due to discovery of the cancer at already an advanced stage. Interestingly, endometriosis a benign but invasive gynecological disease has been described as a "precursor lesion" in the development of specific subtypes of ovarian cancer. Endometriotic cyst development involves the accumulation of "old …

Perceptions Of Mentoring From Fourth Year Medical Students, Stephen Charles

USF Tampa Graduate Theses and Dissertations

This mixed-methods research study investigated medical students' perspectives of professional mentoring through a web-based survey/needs assessment. The participants are fourth year medical students from three large urban research institutions and two regional branch campuses. The web-based survey/needs assessment was created, peer reviewed, and validated. A strategic sampling of focus groups was conducted to gather additional information regarding the results from the web-based survey. The information and data obtained from the survey and focus groups was used to provide recommendations for administrators and faculty about the mentoring program for each campus. A new proposed model of mentoring was developed upon analysis …

Cultivating Change: Negotiating Development And Public Policy In Southern California's Wine Country, Laurel Dawn Dillon-Sumner

USF Tampa Graduate Theses and Dissertations

In the Temecula Valley, California, neoliberal development policies were implemented that had the potential to bring drastic changes to this semi-rural area, renowned for its wine production and idyllic setting as a wine tourism destination. In order to better understand the contested nature of these development plans, I conducted ethnographic and key informant interviews and public policy analysis research with policy-making officials, local residents and other stakeholding groups that formed in opposition to the planned expansion. This applied anthropology of policy was uniquely situated to explore the tensions between various stakeholders. This thesis serves to propose interventions that could have …

Influence Of Diet On Element Incorporation In The Shells Of Two Bivalve Molluscs: Argopecten Irradians Concentricus And Mercenaria Mercenaria, William Noland Elsaesser

USF Tampa Graduate Theses and Dissertations

Recently, biogenic carbonates have received much attention as potential proxies of environmental change; however, a major pathway of elemental incorporation is often overlooked when making interpretations or designing experiments. This research experimentally examines the influence of diet on elemental composition in juvenile shells of the bay scallop, Argopecten irradians concentricus, and the northern quahog, Mercenaria mercenaria.

Exploratory trials were conducted using Argopecten irradians concentricus juveniles fed different algal diets: Isochrysis, Chaetoceros, Pavlova, Tetraselmis, or a mix of all four in a 2:1:2:2 ratio. No differences between the left and right valves were revealed, thus, subsequent analysis of the dietary influence …

Beyond Performance: Rhetoric, Collective Memory, And The Motive Of Imprinting Identity, Brenda M. Grau

USF Tampa Graduate Theses and Dissertations

This thesis reconsiders Maurice Halbwachs' theory of collective memory in terms of rhetoric. My purpose is to examine specifically how fading generations conform the present to the past as they fight to maintain and defend their collective identities. Although rhetoric and memory studies have often focused on the complex matters of national collectives, Halbwachs was also concerned with the individual and his or her interaction among those groups that matter in everyday living and memory's role in generational shifts that slowly transform culture. Halbwachs' theory helps determine exactly how attempts at conflict resolution are sometimes guarded defenses against threats to …