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Lilliput Effect Dynamics Across The Cretaceous-Paleogene Mass Extinction: Approaches, Prevalence, And Mechanisms, Matthew Brett Jarrett

USF Tampa Graduate Theses and Dissertations

An organism's body size entails both physiological and ecological costs. Furthermore, as a parameter in analyzing organisms, it represents a fundamental and essential morphometric character. Reductions in size following mass extinction is a commonly observed phenomenon in the fossil record. This study examines the evolutionary significance of this phenomenon termed the: 'Lilliput Effect' by proposing that it represents a rapid evolutionary response to altered selection pressures during a mass extinction. This primary hypothesis is evaluated against two additional hypotheses of size reduction: 1) stunted growth as a response to stressed ecosystems, and/or 2) mass extinctions are size selective.

These hypotheses …

The Apatow Aesthetic: Exploring New Temporalities Of Human Development In 21st Century Network Society, Michael D. Rosen

USF Tampa Graduate Theses and Dissertations

This thesis offers a critical examination of what I call the “Apatow aesthetic” in order to analyze the social processes of growing up in contemporary neoliberal network society. While doctors, psychologists and social scientists still proffer a model of mid- 20th century human development centered around a chronologically-determined life cycle, the Apatow aesthetic imagines a non-linear reality where traditional life events and social practices don’t always correspond to specific age groups. Specifically, I argue, the Apatow aesthetic subjects the spectator to the pleasures and pains of these life-cycle disruptions, and reveals the unfolding of a new cultural shift which challenges …

Nothin' But A Good Time: Hair Metal, Conservatism, And The End Of The Cold War In The 1980s, Chelsea Anne Watts

USF Tampa Graduate Theses and Dissertations

This dissertation offers a cultural history of the 1980s through an examination of one of the decade’s most memorable cultural forms – hair metal. The notion that hair metal musicians, and subsequently their fans, wanted “nothin’ but a good time,” shaped popular perceptions of the genre as shallow, hedonistic, and apolitical. Set against the backdrop of Reagan’s election and the rise of conservatism throughout the decade, hair metal’s transgressive nature embodied in the performers’ apparent obsession with partying and their absolute refusal to adopt the traditional values and trappings of “yuppies” or middle-class Americans, certainly appeared to be a strong …

Longshoremen's Negotiation Of Masculinity And The Middle Class In 1950s Popular Culture, Tomaro I. Taylor

USF Tampa Graduate Theses and Dissertations

This thesis considers mid-20^th century portrayals of working-class longshoremen’s masculinity within the context of emerging middle-class gender constructions. I argue that although popular culture presents a roughly standardized depiction of longshoremen as “manly men,” these portrayals are significantly nuanced to demonstrate the difficulties working-class men faced as they attempted to navigate socio-cultural and socio-economic shifts related to class and the performance of their male gender. Specifically, I consider depictions of longshoremen’s disruptive masculinity, male identity formation, and masculine-male growth as reactions to paradigmatic shifts in American masculinity. Using three aspects of longshoremen’s non-work lives presented in A View from …

The Effects Of Phytohormones And Isoprenoids In Dihydroartemisinin-Induced Dormancy In The Erythrocytic Stages Of Plasmodium Falciparum, Marvin Duvalsaint Duvalsaint

USF Tampa Graduate Theses and Dissertations

Our ability to control malaria has been challenged by increasing antimalarial resistance. Plasmodium falciparum undergoes dormancy in the blood stages which is hypothesized to be a means by which they are able to survive under drug pressure. This helps select for resistant parasites which grow following removal of drug. The mechanisms behind dormancy and the subsequent recrudescence are not fully understood but translating knowledge from related organisms which undergo a similar phenomenon might shed some light. Higher plants utilize dormancy during the early development stages to survive under unfavorable conditions, increasing fitness of the seedling and ensuring viability when this …

Mitochondrial Heteroplasmy Contributes To The Dynamic Atovaquone Resistance Response In Plasmodium Falciparum, Sasha Victoria Siegel

USF Tampa Graduate Theses and Dissertations

Of the considerable challenges researchers face in the control and elimination of malaria, the development of antimalarial drug resistance in parasite populations remains a significant hurdle to progress worldwide. Atovaquone is used in combination with proguanil (Malarone) as an antimalarial treatment in uncomplicated malaria, but is rendered ineffective by the rapid development of atovaquone resistance during treatment. Previous studies have established that de novo mutant parasites confer resistance to atovaquone with a substitution in amino acid 268 in the cytochrome b gene encoded by the parasite mitochondrial genome, yet much is still unknown about how this resistance develops, and whether …

Storm Induced Beach Profile Changes Along The Coast Of Treasure Island, West-Central Florida, U.S.A., Zhaoxu Zhu

USF Tampa Graduate Theses and Dissertations

Storms play a significant role in beach morphodynamics. Storm-induced beach-profile changes and their longshore variations are investigated in this study. The impacts of four summer tropical storms and two series of winter storms over the last 10 years along the coast of Treasure Island were documented. Tropical storms Alberto in 2006, Fay in 2008, Debby in 2012, Hermine in 2016 and winter storms in winter seasons of 2014 and 2015 are discussed in this study. In general, the Treasure Island beach experienced more erosion generated by tropical storms with greater intensity, but shorter duration, as compared to winter storms due …

A Longitudinal Examination Of A Ssi-Embedded Experiential Environmental Education Course And Environmental Behaviors, Mark H. Newton

USF Tampa Graduate Theses and Dissertations

A perennial goal of environmental education is to produce a scientifically literate citizenry capable of negotiating and resulting complex environmental problems. Popular methods of environmental education instruction tend to overemphasize scientific content knowledge and neglect to consider ethical and moral aspects of the problem. This qualitative study examines the longitudinal association between an experiential environmental education course infused with SSI instruction and students’ environmental behaviors. The results indicate that several students’ conceptualizations of contentious environmental issues change after completing the course and specifically. Furthermore, students’ willingness to act to resolve contentious environmental issues was most closely associated with their environmental …

Photocatalytic Reduction Of Co2 With Tunable Bandgap And Bandedge Materials, Thuhuong T. Ngo

USF Tampa Graduate Theses and Dissertations

Solar energy is a sustainable resource which has substantial potential to meet the increasing demand for renewable energy. Though there has been some success in harvesting solar energy for electricity production, converting solar energy to chemical energy as fuels is still a challenge due to low efficiency.

Since the discovery of TiO₂ photocatalysts for splitting water (4) and reducing CO₂ (5) to form useful chemical feedstock such as H₂, CO and CH₄, much research has been done to increase the efficiency of photocatalysts. However, the current conversion efficiency of photocatalysts remains low (~5%) (6, …

Vdr-Ripk1 Interaction And Its Implications In Cell Death And Cancer Intervention, Waise Quarni

USF Tampa Graduate Theses and Dissertations

Receptor interacting protein kinase 1 (RIPK1) is an enzyme acting downstream of tumor necrosis factor alpha to control cell survival and death. RIPK1 expression has been reported to cause drug resistance in cancer cells; but so far, no published studies have investigated the role of RIPK1 in vitamin D action. In the present study, we investigated whether RIPK1 played any role in 1,25-dihydroxyvitamin D3 (1,25D3)-induced growth suppression. In our studies, RIPK1 decreased the transcriptional activity of vitamin D receptor (VDR) in luciferase reporter assays independently of its kinase activity, suggesting a negative role of RIPK1 in 1,25D3 action. RIPK1 also …

Reduced Dimensionality Effects In Gd-Based Magnetocaloric Materials, Hillary Faith Belliveau

USF Tampa Graduate Theses and Dissertations

Magnetic refrigeration based on the magnetocaloric effect (MCE) is a promising alternative to conventional gas compression based cooling techniques. Understanding impacts of reduced dimensionality on the magnetocaloric response of a material such as Gadolinium (Gd) or its alloys is essential in optimizing the performance of cooling devices, which is also the overall goal of this thesis. We have determined, in the first part of the thesis, that laminate structures of pure Gd produced by magnetron sputtering have several disadvantages. The target material (pure Gd), ultra-high vacuum components, and the electrical energy it takes to run the manufacturing process are all …

The Perspectives Of Core Academic Middle School Teachers Regarding Career Education Under Different School Settings, Meredith Leigh Bogush

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to quantify core academic middle school teachers’ (English/language arts, mathematics, science, and social science) perspectives of career education. Prior research denotes that if career education exposure and awareness is provided in middle school grades, then students have the potential to develop a valuable understanding of various occupations available in the future (Akos, Konold, & Niles, 2004). Students observe what the work accomplishes and the effort required for the employee to be successful. If the occupation interests the students, then an increased motivation to complete their studies is likely to develop as they see the …

Reification, Resistance, And Transformation? The Impact Of Migration And Demographics On Linguistic, Racial, And Ethnic Identity And Equity In Educational Systems: An Applied Approach, Rebecca Ann Campbell

USF Tampa Graduate Theses and Dissertations

Using an applied anthropological approach focused on language, this study investigates the relationship between linguistic, racial, and ethnic identities and school resource access in the context of migration. This project examines how these identities are established, experienced, reified, and resisted by various school actors. Exposing power at its roots through a multi-level analysis, this research informs on how people negotiate socialization into particular identities, propelling them toward positions in school and society of varying opportunity.

Focused on two elementary schools in a central Florida county that has been and is undergoing demographic changes, this work offers applications for educational institutions …

Impact Of Health Insurance For The Poor On Labor Market Out Comes: Evidence From Indonesia., Youssef Fassi Fehri

USF Tampa Graduate Theses and Dissertations

I examine the impact of a health insurance program for the poor implemented in Indonesia in 2005 on labor supply and informal work measured by employment status outside of the private and public formal sector. As a first step to its ambitious plan for universal coverage, this program extended subsidized health insurance coverage to a large proportion of Indonesia’s poor and near-poor population. Using a rich longitudinal survey, I estimate the average treatment effect on the treated using a combined propensity score matching method with difference in differences. The richness of the data allows me to control for a set …

Resonant Light Scattering From Semiconductor Quantum Dots, Kumarasiri Konthasinghe

USF Tampa Graduate Theses and Dissertations

In this work, resonant laser spectroscopy has been utilized in two major projects --resonance fluorescence measurements in solid-state quantum-confined nanostructures and laser-induced fluorescence measurements in gases. The first project focuses on studying resonant light-matter interactions in semiconductor quantum dots "artificial atoms" with potential applications in quantum information science. Of primary interest is the understanding of fundamental processes and how they are affected by the solid-state matrix. Unlike atoms, quantum dots are susceptible to a variety of environmental influences such as phonon scattering and spectral diffusion. These interactions alter the desired properties of the scattered light and hinder uses in certain …

Improved 2d And 3d Resistivity Surveys Using Buried Electrodes And Optimized Arrays: The Multi-Electrode Resistivity Implant Technique (Merit), Henok Gidey Kiflu

USF Tampa Graduate Theses and Dissertations

This thesis presents a novel resistivity method called Multi-Electrode resistivity technique (MERIT) that is used for high resolution imaging of complex geologic features at depth and near the edges of survey lines. The MERIT electrodes are especially shaped and designed to be self-driven using a robust-direct push technique. Measurements are taken using optimized arrays that are generated using a modified version of the “Compare-R” optimization algorithm. This work focused on both two-dimensional (MERIT2D) and three-dimensional (MERIT3D) applications of the buried array and show the relevance of the additional information gained by the addition of deep electrodes especially in sites with …

Locally Optimized Mapping Of Slum Conditions In A Sub-Saharan Context: A Case Study Of Bamenda, Cameroon, Julius Anchang

USF Tampa Graduate Theses and Dissertations

Despite being an indicator of modernization and macro-economic growth, urbanization in regions such as Sub-Saharan Africa is tightly interwoven with poverty and deprivation. This has manifested physically as slums, which represent the worst residential urban areas, marked by lack of access to good quality housing and basic services. To effectively combat the slum phenomenon, local slum conditions must be captured in quantitative and spatial terms. However, there are significant hurdles to this. Slum detection and mapping requires readily available and reliable data, as well as a proper conceptualization of measurement and scale. Using Bamenda, Cameroon, as a test case, this …

Frequency Tunable Antennas And Surface Microwave Imaging System Using Microfluidic Reconfiguration Techniques, Abhishek Dey

USF Tampa Graduate Theses and Dissertations

Reconfigurable radio frequency (RF) devices are attractive for miniaturization of wireless components and systems by handling functionality of multiple distinct devices. Existing reconfiguration techniques rely on device loadings with semiconductor diodes, ferrite/ferroelectric materials, and microelectromechanical system (MEMS) switches and capacitors. However, it is well-recognized that these techniques cannot fully address important system metrics such as high efficiency, wide frequency tuning range, high power handling capability and cost. Therefore, novel alternative techniques are highly desirable to advance the state of the art in reconfigurable RF devices. The aim of this dissertation is to investigate the novel concept of microfluidically loaded reconfigurability …

Quantitative Proteomic Investigation Of Disease Models Of Type 2 Diabetes, Mark Gabriel Athanason

USF Tampa Graduate Theses and Dissertations

PANcreatic DERived factor (PANDER, FAM3B) is a member of a superfamily of FAM3 proteins that are uniquely structured and strongly expressed from the endocrine pancreas and co-secreted with insulin. Unique animal models available to our lab have indicated that PANDER can induce a selective hepatic insulin resistant (SHIR) phenotype whereby insulin signaling is blunted yet lipogenesis is increased. The complexity of the biological networks involved with this process warranted the logical approach of employing quantitative mass spectrometry based proteomic analysis using stable isotope labeling of amino acids in cell culture (SILAC) to identify the global proteome differences between the PANDER …

Levels Of Distress Among Women Veterans Attending A Women’S Health Specialty Clinic In The Va Healthcare System, Debbie T. Devine

USF Tampa Graduate Theses and Dissertations

Currently, between 21.9 and 23 million veterans have served in the United States armed forces. Of those, 2 million are women, and of those, only 6.5% use the Veterans Health Administration system. These females often suffer from physical and mental health disorders, and overall impaired quality of life (QOL), rendering their healthcare needs complex. Seeking, and providing care in this specialty area may become overwhelming not only for the women seeking the care, but also for healthcare systems that are unfamiliar with the specific needs of this population.

A retrospective medical records review was completed of 51 female veterans between …

The Effects Of Synthetic And Dietary Therapeutics On Learning, Memory, Motor Coordination, And Seizure In An Angelman Syndrome Mouse Model, Stephanie Lynn Ciarlone

USF Tampa Graduate Theses and Dissertations

Angelman syndrome (AS) is a rare genetic and neurological disorder presenting with severe developmental delay, ataxia, epilepsy, and lack of speech. AS is associated with a neuron-specific loss of function of the maternal UBE3A allele, a gene encoding an E3 ubiquitin ligase. Currently, no cure exists for this disorder; however, recent research using an AS mouse model suggests that pharmacological intervention is plausible, and can alleviate some of the detrimental phenotypes reported in AS patients.

Although there is no curative treatment for AS, seizure medication and behavioral therapies are most commonly prescribed in order to minimize symptoms. However, these options …

Attitudes Toward Adult Education Among Adult Learners Without A High School Diploma Or Ged, Andrea Rose Bennett

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to explore attitudes toward adult education among adult learners without a high school diploma or the General Educational Development (GED). In this study, adult learners without a high school diploma or GED completed the Attitudes Toward Adult Education Scale (AACES) and selected respondents volunteered to participate in a face-to-face interview in conjunction with the mixed methods section of the study. For this study, I used a 5-point Likert scale to measure the responses on the 22-item AACES survey.

Three hundred and fifty respondents participated in the study. Descriptive statistics and a three-way ANOVA revealed …

Gene Expression Profiling And The Role Of Hsf1 In Ovarian Cancer In 3d Spheroid Models, Trillitye Paullin

USF Tampa Graduate Theses and Dissertations

Ovarian cancer is the most lethal gynecological cancer, with over 200,000 women diagnosed each year and over half of those cases leading to death. These poor statistics are related to a lack of early symptoms and inadequate screening techniques. This results in the cancer going undetected until later stages when the tumor has metastasized through a process that requires the epithelial to mesenchymal transition (EMT). In lieu of traditional monolayer cell culture, EMT and cancer progression in general is best characterized through the use of 3D spheroid models. In this study, we examine gene expression changes through microarray analysis in …

Confinement Effects And Magnetic Interactions In Magnetic Nanostructures, Kristen Lee Stojak Repa

USF Tampa Graduate Theses and Dissertations

Multifunctional nanocomposites are promising for a variety of applications ranging from microwave devices to biomedicine. High demand exists for magnetically tunable nanocomposite materials. My thesis focuses on synthesis and characterization of novel nanomaterials such as polymer nanocomposites (PNCs) and multi-walled carbon nanotubes (MWCNTs) with magnetic nanoparticle (NP) fillers.

Magnetite (Fe₃O₄) and cobalt ferrite (CoFe2O4) NPs with controlled shape, size, and crystallinity were successfully synthesized and used as PNC fillers in a commercial polymer provided by the Rogers Corporation and poly(vinylidene fluoride). Magnetic and microwave experiments were conducted under frequencies of 1-6 GHz in the presence of …

Understanding The Doctoral Student Supervisory Experience: A Qualitative Examination Of Counselor Education Doctoral Student's Perception Of Their Supervision Training, Jinah Jimenez Rordam

USF Tampa Graduate Theses and Dissertations

The purpose of this study is to gain an understanding of the supervision process that takes place between the counselor education doctoral student and the doctoral student’s faculty supervisor from the perception of the doctoral student supervisor. The goal of this study is to identify salient constructs that impact the effectiveness of the supervisory experience. A qualitative design was used to collect and analyze data. Six doctoral student supervisors were interviewed and the data analyzed. Themes of the supervisory experience that impact the supervision process and outcome were identified. They were: Supervisor Competency, Supervisor Individual Characteristics, and Supervisory Relationship. Recommendations …

The Impact Of Criminal Justice Interventions And Social Policies On Family Violence: Theory And Evidence, Sianne Diana Vijay

USF Tampa Graduate Theses and Dissertations

In 2014, the Child Protective Services received 3.6 million referrals alleging child abuse and neglect, of which, 702,000 children were victims of abuse and neglect and an estimated 1,580 children died due to maltreatment. In addition to this appalling toll, the welfare effects of child victimization are substantial. Evidence suggests that compared to demographically similar adults who were non-victims, adults with documented histories of maltreatment are more likely to engage in criminal behavior; have adverse mental and physical health problems such as depression, addiction and post-traumatic stress disorder; and have lower levels of education and earnings. These essays contribute toward …

Advancements In Thermal Integrity Profiling Data Analysis, Kevin Russell Johnson

USF Tampa Graduate Theses and Dissertations

Thermal Integrity Profiling (TIP) is a relatively new non-destructive test method for evaluating the post-construction quality of drilled shafts. Therein anomalies in a shaft are indicated by variations in its thermal profile when measured during the curing stages of the concrete. A considerable benefit with this method is in the ability to detect anomalies both inside and outside the reinforcement cage, as well as provide a measure of lateral cage alignment. Similarly remarkable, early developments showed that the shape of a temperature profile (with depth) matched closely with the shape of the shaft, thus allowing for a straightforward interpretation of …

Hospitable Climates: Representations Of The West Indies In Eighteenth-Century British Literature, Marisa Carmen Iglesias

USF Tampa Graduate Theses and Dissertations

British expansion to the West Indies in the eighteenth-century resulted in vast economic growth for the British Empire and a rise in literature set in the region. Examining the literature allows for an in-depth exploration of how the Caribbean has become associated as a place of relaxation and escape though its early history of colonialism is fraught with violence. My study builds on the understanding of the Caribbean region in the eighteenth-century and utilizes hospitality theory to articulate the role that cultural exchange and physical setting play in the texts and in the formation of national identity, both in the …

Towards Computational Human Behavior Modeling For Just-In-Time Adaptive Interventions, Tylar Murray

USF Tampa Graduate Theses and Dissertations

The advent of powerful wearable devices and smartphones has enabled a new generation of “in-the-wild” user studies, adaptive behavioral intervention strategies, and context measurement. Though numerous proof-of-concept studies continue to push the limitations of what a behavioral scientist can do with these technologies, there remains a major methodological roadblock separating behavioral theory and application. Avatar-user interaction theory, for example, is not well defined in its formulation, and thus guidelines for intervention designers depend on heuristic methods and designer intuition. Computational modeling has been slow to move into behavioral science in general, but a growing population of behavioral scientists recognize this …

Optimal Demand Response Models With Energy Storage Systems In Smart Grids, Mohemmed Masooud Alhaider

USF Tampa Graduate Theses and Dissertations

This research aims to develop solutions to relieve system stress conditions in electric grids. The approach adopted in this research is based on a new concept in the Smart Grid, namely, demand response optimization. A number of demand response programs with energy storage systems are designed to enable a community to achieve optimal demand side energy management.

The proposed models aim to improve the utilization of the demand side energy through load management programs including peak shaving, load shifting, and valley lling. First, a model is proposed to nd the optimal capacity of the battery energy storage system (BESS) to …