Digital Commons Network^™

Initial Comparative Empirical Usability Testing For The Collaborative Authentication System, Kim Bursum

USF Tampa Graduate Theses and Dissertations

The Collaborative Authentication (co-authentication) system is an authentication system that relies on some or all members of a pre-registered set of secure hardware tokens being concurrently present to an authentication server at the moment of authentication. Previous researchers have compared various embodiments of the co-authentication system to each other including using Quick Response (QR) codes/cellphone cameras and Near Field Communication (NFC) between tokens. This thesis concerns the initial design and implementation of empirical comparative testing mechanisms between one embodiment of the co-authentication system and other commonly used authentication systems. One contribution is the simulated standard user ID and password login …

An Exploration Of The Relationship Between Child Welfare Workers’ Ambivalent Sexism And Beliefs About Father Involvement, Katrina Lee Brewsaugh

USF Tampa Graduate Theses and Dissertations

Research over the last few decades has consistently found that fathers are not routinely included in the provision of child welfare services. The current study examined whether ambivalent sexism on the part of child welfare workers was related to their beliefs about involving fathers. Ambivalent sexism theory posits that gender stereotypes include subjectively positive beliefs in addition to hostile beliefs that both serve to perpetuate patriarchal systems. Participants (N = 490) were currently front-line child welfare workers in the United States who completed an online survey assessing ambivalent sexism and beliefs about father involvement in child welfare cases. Ambivalent sexism …

Recombinant Elastin Based Nanoparticles For Targeted Gene Therapy, Dagmara Anne Monfort

USF Tampa Graduate Theses and Dissertations

Gene therapy is a technique used to inactivate, replace or insert a corrective copy of a defective gene in order to help diseased tissues to function properly. Gene therapy is a promising treatment for many diseases cancer, cystic fibrosis, and Parkinson’s. There are different methods to introduce a gene to the cell; one of them is the use of viruses. Among viruses, lentiviruses have been popular vectors for gene delivery due to their efficient mode of gene delivery. However, the non-specific delivery of genes associated with viruses may result in undesirable side effects. Here, we propose a heterogeneous nanoparticle delivery …

Constructing Health Narratives: Patient Feedback In Online Communities, Katie Lynn Walkup

USF Tampa Graduate Theses and Dissertations

This project examines user-generated health narratives through corpus analysis of 246 reviews posted on Midwestern Hospital’s Yelp page. Understanding how different stakeholders act and interact within online health communities models a shift in new conceptions of health, and provides evidence of health ecologies’ ability to determine patient perceptions of care. Documents produced by users in these health communities represent health narratives comprised of a user’s health experience, that user’s treatment perceptions, and the community’s perceptions of the user’s experience. Author uses corpus methods to interpret user trace data and rhetorical moves embedded in health narratives. Findings suggest that users who …

Effects Of Anthropogenic Activity On The Green Swamp Preserve Ecosystem, Barbara Ann Nordheim-Shelt

USF Tampa Graduate Theses and Dissertations

The Green Swamp Preserve is a large geographic area that has sustained many changes since Europeans settled in Florida. There has been little published research on the impacts of anthropogenic activity on this system. This thesis research seeks to document more recent changes in the Green Swamp and to evaluate the effects of various human activities on the system. The study period is from 1985 to 2015. For this time period changes in land use and landcover were examined using neural network classifications. Changes in vegetation health were evaluated by examining Normalized Difference Vegetation Index (NDVI) and Green Vegetation Index …

Get Ye A Copper Kettle: Appalachia, Moonshine, And A Postcolonial World, Christopher David Adkins

USF Tampa Graduate Theses and Dissertations

For little over a century, the American region of Appalachia was an internal mineral colony of the United States. This internal colonization produced innumerable negative environmental and economic effects, as well as – most insidious of all – the constructed stereotype of the Hillbilly that even in the Twenty-First Century refuses to die. Yet part and parcel of that same stereotype is something found all over Appalachia, representing a freedom, an identity, and an heritage so long denied to Appalachia and the Appalachian people on its own terms: moonshine, the colorless, unaged corn whiskey long produced both in Appalachia …

What Makes Water Policy Sustainable? An Analysis Of Water Policy In Us Cities, Rebecca Brady David

USF Tampa Graduate Theses and Dissertations

This dissertation works to create a clearer understanding of sustainability in water policy. Current water policy in four US cities was compared to a matrix of recommended sustainability themes that have been presented in the literature to determine the extent of which these themes have been implemented into water policy. To best analyze policy for sustainability it is necessary to look at the policy of cities that are considered sustainable. This was determined by a city’s inclusion in “Most Sustainable US Cities” lists. The two cities that best represented sustainability were Austin, TX and San Francisco, CA. The research also …

Impact Force Reduction Using Variable Stiffness With An Optimal Approach For Jumping Robots, Juan Manuel Calderon Chavez

USF Tampa Graduate Theses and Dissertations

Running, jumping and walking are physical activities that are performed by humans in a simple and efficient way. However, these types of movements are difficult to perform by humanoid robots. Humans perform these activities without difficulty thanks to their ability to absorb the ground impact force. The absorption of the impact force is based on the human ability to vary muscles stiffness.

The principal objective of this dissertation is to study vertical jumps in order to reduce the impact force in the landing phase of the jump motion of humanoid robots. Additionally, the impact force reduction is applied to an …

An Examination Of John Burton’S Method Of Conflict Resolution And Its Applicability To The Israeli-Palestinian Conflict, John Kenneth Steinmeyer

USF Tampa Graduate Theses and Dissertations

This paper argues that the interactive problem-solving workshops created by political scientist John Burton and applied to the Israeli-Palestinian conflict by social psychologist Herbert Kelman, while not, as yet, resulting in a just and permanent peace agreement, are effective in resolving intractable conflict, and, if persistently used, can significantly help to produce such an agreement. This is done by closely examining two books of Burton and a series of articles by Kelman to describe their process; the characteristics of intractable conflict are also reviewed from the work of social psychologist Daniel Bar-Tal. It is then argued that the psychological elements …

Exploring Mathematics Teacher Education Fieldwork Experiences Through Storytelling, Melody Jeane Elrod

USF Tampa Graduate Theses and Dissertations

Throughout the history of teacher education, the final fieldwork experience has often been called the single most influential experience in teacher preparation programs (Burns, Jacobs, & Yendol-Hoppey, 2016; Feiman-Nemser & Buchmann, 1986; Parker-Katz & Bay, 2008). Though this experience has been expanded to include fieldwork experiences throughout many teacher education programs (Guyton & McIntyre, 1990), the final fieldwork experience remains the closing activity and the lasting image of teacher preparation (Feiman-Nemser & Buchmann, 1986; Rosaen & Florio-Ruane, 2008). Given its importance, though, researchers know relatively little about it. “The knowledge thus produced is akin to the quantum theory of physics; …

Impedance Optimized Electric Pulses For Enhancing Cutaneous Gene Electrotransfer, Reginald Morley Atkins

USF Tampa Graduate Theses and Dissertations

Electric field mediated gene delivery modalities have preferable safety profiles with the ability to rapidly transfect cells in vitro and in vivo with high efficiency. However, the current state of the art has relied on trial and error studies that target the average cell within a population present in treated tissue to derive electric pulse parameters. This results in fixed gene electrotransfer (GET) parameters that are not universally optimum. Slow progress towards the validation of a mechanism that explains this phenomena has also hindered its advancement in the clinic. To date, GET methods utilizing feedback control as a means to …

Changing The Pathobiological Paradigm In Myelodysplastic Syndromes: The Nlrp3 Inflammasome Drives The Mds Phenotype, Ashley Basiorka

USF Tampa Graduate Theses and Dissertations

Note: Portions of this abstract have been previously published in the journal Blood, Basiorka et al. Blood. 2016 Oct 13, and has been reproduced in this manuscript with permission from the publisher.

Myelodysplastic syndromes (MDS) are genetically diverse hematopoietic stem cell malignancies that share a common phenotype of cytological dysplasia, ineffective hematopoiesis and aberrant myeloid lineage maturation. Apoptotic cell death potentiated by inflammatory cytokines has been considered a fundamental feature of MDS for over two decades. However, this non-inflammatory form of cell death cannot account for the inflammatory nature of these disorders. We report that a hallmark of lower-risk …

Catalytic Upgrading Of Biogas To Fuels: Role Of Reforming Temperature, Oxidation Feeds, And Contaminants, Nada Elsayed

USF Tampa Graduate Theses and Dissertations

Global energy demands are constantly increasing and fossil fuels are a finite resource. The shift towards alternative, more renewable and sustainable fuels is inevitable. Furthermore, the increased emissions of greenhouse gases have forced a pressing need to find cleaner, more environmentally friendly sources of fuel. Biomass energy is a promising alternative fuel because it offers several important advantages. It is a renewable energy form, it comes from many sources and produces biogas (CH₄ and CO₂). Furthermore, it can have a zero carbon footprint; this is due to the fact that the carbon produced is from the same …

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 …

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 …

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 …

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 …

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 …

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 …

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 …

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 …

Violence And Disagreement: From The Commonsense View To Political Kinds Of Violence And Violent Nonviolence, Gregory Richard Mccreery

USF Tampa Graduate Theses and Dissertations

This dissertation argues that there is an agreed upon commonsense view of violence, but beyond this view, definitions for kinds of violence are essentially contested and non-neutrally, politically ideological, given that the political itself is an essentially contested concept defined in relation to ideologies that oppose one another. The first chapter outlines definitions for a commonsense view of violence produced by Greene and Brennan. This chapter argues that there are incontestable instances of violence that are almost universally agreed upon, such as when an adult intentionally smashes a child’s head against a table, purposefully causing harm. It is also claimed …

A Framework For Studying Meshfree Geometry And A Method For Explicit Boundary Determination, Joseph Bradley Alford

USF Tampa Graduate Theses and Dissertations

Patient-specific biomechanical analysis is an important tool used to understand the complex processes that occur in the body due to physical stimulation. Patient-specific models are generated by processing medical images; once an object from the image is identified via segmentation, a point cloud representation of the object is extracted. Generating an analysis suitable representation from the point cloud has traditionally required generating a finite element mesh, which often requires a well defined surface to accomplish. Point clouds lack a well defined geometry, meaning that the surface definition is incomplete at best. Point clouds that have been generated from images have …

The Debt Burden Of Entry-Level Physical Therapists In Florida, Steven Benton Ambler

USF Tampa Graduate Theses and Dissertations

Despite the education, autonomy, and high demand for physical therapists both nationally and in Florida, recent graduates have seen steadily rising education costs with disproportionate changes in income once they have graduated and entered the workforce. The growing debt burden of physical therapists entering the workforce, coupled with the growth in projected need and stagnant wages, raises concern about where and how entry-level physical therapists will practice and if these choices will be affected by their debt burden. The purpose of this quantitative, cross-sectional survey study was to identify the debt profile of entry-level physical therapists and explore the relationship …

The Elusiveness Of Inclusiveness: A Discursive Analysis Of Inclusion In A District Level Exceptional Student Education Leadership Team, Karen Ramlackhan

USF Tampa Graduate Theses and Dissertations

This poststructural study utilizes Foucault’s theories of power/knowledge nexus and disciplinary power to explore the discursive formation of inclusion of a district level Exceptional Student Education leadership team in order to understand how the discourses are constructed, practices are normalized, and power relations are legitimized. This type of analysis interrogated the assumptive groundings of special education in the district, and how these have been taken-for-granted and normalized in the professional knowledge, policies, and practices of the field. Data from multiple sources: semi-structured interviews, observations, multimodal forms of communication, observation journal, and researcher reflexive journal produced findings within four dominant discourses---the …

Family Communication Concerning End-Of-Life Care Preferences, Lindsay Jo Peterson

USF Tampa Graduate Theses and Dissertations

Communication concerning the care one wishes to receive at the end of life (EOL) is central to ensuring that wishes are honored. Many studies have examined doctor-patient or doctor-family EOL communication. However, relatively few studies have focused on the occurrence of EOL care discussions among family members. This is an important topic, as research suggests that advance directives (ADs) are ineffective if patients have not involved surrogate decision-makers, most of whom are family members. This study examined EOL care discussions among family members. It used quantitative and qualitative data from a diverse sample of older adults from West Central Florida …

Regulation Of Palmitoylation Enzymes And Substrates By Intrinsically Disordered Regions, Krishna D. Reddy

USF Tampa Graduate Theses and Dissertations

Protein palmitoylation refers to the process of adding a 16-carbon saturated fatty acid to the cysteine of a substrate protein, and this can in turn affect the substrate’s localization, stability, folding, and several other processes. This process is catalyzed by a family of 23 mammalian protein acyltransferases (PATs), a family of transmembrane enzymes that modify an estimated 10% of the proteome. At this point in time, no structure of a protein in this family has been solved, and therefore there is poor understanding about the regulation of the enzymes and their substrates. Most proteins, including palmitoylation enzymes and substrates, have …