Digital Commons Network^™

Manipulating Electromagnetic Waves With Enhanced Functionalities Using Nonlinear And Chiral Metamaterials, Sinhara Rishi Malinda Silva

USF Tampa Graduate Theses and Dissertations

Metamaterials are artificial structures, which periodically arranged to exhibit fascinating electromagnetic properties, not existing in nature. A great deal of research in the field of metamaterial was conducted in a linear regime, where the electromagnetic responses are independent of the external electric or magnetic fields. Unfortunately, in linear regime the desired properties of metamaterials have only been achieved within a narrow bandwidth, around a fixed frequency. Therefore, nonlinearity is introduced into metamaterials by merging meta-atoms with well-known nonlinear materials. Nonlinear metamaterials are exploited in this dissertation to introduce and develop applications in microwave frequency with broadband responses. The nonlinearity was …

Collaboration With Families: Perceptions Of Special Education Preservice Teachers And Teacher Preparation, Mehmet Emin Ozturk

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to explore the integration of family involvement in the courses and field experiences in an undergraduate special education program. This study also explored preservice teachers’ perceptions about what they learned in their program and the perceptions, and understandings of pre-service teachers regarding collaboration with families based on their past experiences with their families. This study used qualitative research methods to answer questions about perceptions of pre-service teachers’ perceptions of collaborating with families and the extent to which their perceptions are influenced by their own family backgrounds as well as their perceptions about what they …

Aphra Behn On The Contemporary Stage: Behn's Feminist Legacy And Woman-Directed Revivals Of The Rover, Nicole Elizabeth Stodard

USF Tampa Graduate Theses and Dissertations

This study theorizes the origins and history of the professional female playwright and director from the Restoration period to the present day through the stage history of Behn's most popular play, The Rover. Part one is comprised of two chapters: the first in this section argues the importance of appreciating Behn's proto-directorial function in the Restoration theatre and her significance to the history of feminism and women in professional theatre; the second chapter in this section examines the implications of casting practices and venue changes to eighteenth-century revivals of Behn's canon with a particular eye towards what a contemporary director …

Design And Modeling Of A High-Power Periodic Spiral Antenna With An Integrated Rejection Band Filter, Jonathan M. O'Brien

USF Tampa Graduate Theses and Dissertations

This work details the design and fabrication of an ultra-wideband periodic spiral antenna (PSA) with a notch filter embedded directly into the radiating aperture. Prototype fabrication of the PSA reveals long assembly time due to forming the antenna element, therefore modifications are made to allow fabricating the antenna elements on a thin, flexible, Polyimide substrate. A transmission line model is develop to support the updated configuration of the antenna elements. In addition, a symmetric spurline filter is integrated into the arms of the spiral antenna in order to address the common problem of interference in ultra-wideband systems. For the first …

Application Of Metamaterials To Rf Energy Harvesting And Infrared Photodetection, Clayton M. Fowler

USF Tampa Graduate Theses and Dissertations

Techniques for adapting metamaterials for the improvement of RF energy harvesting and infrared photodetection are demonstrated using experimental and computer simulation methods. Two methods for RF energy harvesting are experimentally demonstrated and supported by computer simulation. In the first method, a metamaterial perfect absorber (MPA) is made into a rectenna capable of harvesting RF energy and delivering power to a load by soldering Schottky diodes onto connected split ring resonator (SRR) structures composing the planar metasurface of the perfect absorber. The metamaterial rectenna is accompanied by a ground plane placed parallel to it, which forms a Fabry-Perot cavity between the …

Changing Changelessness: On The Genesis And Development Of The Doctrine Of Divine Immutability In The Ancient And Hellenic Period, Milton Wilcox

USF Tampa Graduate Theses and Dissertations

This project will track and explain the development of the Doctrine of Divine Immutability from early mythological and scriptural source material that seems to indicate that divine entities are changeable into metaphysical systems that demand a perfectly consistent deity. The Doctrine of Divine Immutability is a philosophical and theological postulate that has long been a staple of systematic metaphysics and theology, but its function in robust and fully formed systems is different than its function when it is first generated in Ancient Greece and Judah. Methodologically mostly primary sources are studied and compared with interpretive help from relevant secondary sources. …

Rf Sensing System For Continuous Blood Glucose Monitoring, Fabiola Araujo Cespedes

USF Tampa Graduate Theses and Dissertations

The purpose of this research was to design a blood glucose sensing system based on the induced shift in the resonant frequency of an antenna patch operating in the ISM band (5.725 – 5.875 GHz). The underlying concept is the fact that when a person has variations in their blood glucose levels, the permittivity of their blood varies accordingly. This research analyzed the feasibility of using an antenna patch as a blood glucose sensing device in three configurations: 1) as an implantable active sensor, 2) as an implantable passive antenna sensor, and 3) as a non-invasive sensor. In the first …

The Common Core State Standards And The Elementary Social Studies Curriculum: A Case Study Of Teacher Perceptions In Florida, Kacie M. Nadeau

USF Tampa Graduate Theses and Dissertations

The most recent phase of curriculum reform in the era of accountability is the Common Core State Standards (CCSS) which have essentially reshaped the landscape of public education. Its objective of preparing K-12 students for college and career upon high school graduation have prioritized English language arts, mathematics, and science over social studies, which is not part of widespread high-stakes testing for elementary students. This qualitative case study investigated eleven intermediate elementary teachers’ perceptions of alignment between CCSS and the elementary social studies curriculum. Data gathering analysis included two semi-structured interviews and an archival analysis of the mandated curriculum. The …

The Relationship Between Total Neuropathy Score-Reduced, Neuropathy Symptoms And Function., Ashraf Abulhaija

USF Tampa Graduate Theses and Dissertations

Chemotherapy Induced Peripheral Neuropathy (CIPN) is a common problem among cancer patients who receive a wide range of chemotherapy. This problem causes a decline in quality of life and increased disabilities. CIPN assessment instruments are either subjective, objective, or a combination of both. So far, there is no agreement on the best way for assessment. The goal of this study was to explore the relationships among subjective and objective CIPN assessment instruments. Specifically, this study aimed to 1) evaluate the relationship between the Total Neuropathy Score-reduced (mainly objective) and patients’ function, as measured by the interference scale of the Chemotherapy-Induced …

The Suffering South: 1878 Yellow Fever Narratives And Post-Reconstruction Southern Identity, Jessica Wells

USF Tampa Graduate Theses and Dissertations

The Suffering South offers a cultural history of a yellow fever epidemic that swept through the Mississippi Valley in 1878. It argues that the yellow fever narratives created during this epidemic constituted a discursive attempt by Southerners to renegotiate Southern identity and social hierarchy following the Civil War and Reconstruction. White Southerners, in particular, used the epidemic as an occasion to foster a return to a more traditional foundation of white supremacy and patriarchy as the basis for Southern identity and belonging. The narratives written by these Southerners, in which they described their experiences with yellow fever and the effects …

The Effect Of Corporate Social Responsibility Investment And Disclosure On Cooperation In Business Collaborations, Sukari Farrington

USF Tampa Graduate Theses and Dissertations

I experimentally examine whether disclosure of corporate social responsibility (CSR) investment facilitates cooperation in business collaborations. Business collaborations are essential for firms to maintain their competitive advantage. However, half of all ventures fail. A major reason for this high failure rate is a lack of cooperation among business collaboration partners, known as relational risk. Findings suggest that CSR disclosure leads to greater CSR investment, but does not result in an overall higher level of cooperation. However, CSR disclosure moderates the link between CSR investment and cooperation. When CSR investment is disclosed, cooperation is highest when both managers invest in CSR. …

An Exploration Of First-Year Students’ Engagement In A Postsecondary Common Reading Program, Kali L. Morgan

USF Tampa Graduate Theses and Dissertations

This study used the narrative engagement framework from the communication discipline to explore first-year college students’ engagement in common reading program events and activities, engagement with the text’s narrative, and students’ affirmation of attitudes espoused in the text’s narrative. A total of 325 first-year students enrolled at Texas State University responded to a web-based survey of about their experiences with the 2016-2017 Common Reading Program book, What It Is Like to Go To War (Marlantes, 2011). The book, a memoir of Marlantes’ experiences as a Marine Lieutenant during the Vietnam War, features scholarly reflections on the nature of war and …

Multi-Step Tokenization Of Automated Clearing House Payment Transactions, Privin Alexander

USF Tampa Graduate Theses and Dissertations

Since its beginnings in 1974, the Automated Clearing House (ACH) network has grown into one of the largest, safest, and most efficient payment systems in the world. An ACH transaction is an electronic funds transfer between bank accounts using a batch processing system.

Currently, the ACH Network moves almost $43 trillion and 25 billion electronic financial transactions each year. With the increasing movement toward an electronic, interconnected and mobile infrastructure, it is critical that electronic payments work safely and efficiently for all users. ACH transactions carry sensitive data, such as a consumer's name, account number, tax identification number, account holder …

Improving Reading Comprehension Of Children With Asd: Implication Of Anaphoric Reference Support With Computer Programming, Seda Karayazi Ozsayin

USF Tampa Graduate Theses and Dissertations

This study examined the effects of anaphoric pronouns presented via computer screen on the reading comprehension of four children with Autism Spectrum Disorder (ASD). Stories from the education.com website were used to collect data. The students’ responses to reading comprehension questions during baseline, treatment, and follow-up sessions were analyzed. The perceptions of students regarding anaphoric pronouns were also analyzed. Initially, reading levels, fluency and comprehension rate, of the students with ASD were identified via the Gray Oral Reading Test, Fifth edition (GORT-5), Test of Narrative Language (TNL), and Test of Narrative Language, Second edition (TNL-2). A randomized multiple baseline (MBL) …

Episodic Work-Family Conflict And Strain: A Dynamic Perspective, Kimberly A. French

USF Tampa Graduate Theses and Dissertations

Given rising work and family demands in our society for both men and women, the experience of work-family conflict is commonplace. Work-family conflict occurs when the demands of work or family make it difficult to meet the demands of the alternate domain. A sizeable body of research has established work-family conflict and its nomological network. Despite decades of research, we have yet to form a precise understanding of when work-family conflicts occur and what happens when a conflict arises. The current research addresses these questions using an experience sampling, episodic approach. Two primary research questions are addressed. First, I used …

Rehabilitating Asymmetric Gait Using Asymmetry, Tyagi Ramakrishnan

USF Tampa Graduate Theses and Dissertations

Human gait is a complex process that involves the coordination of the central nervous and muscular systems. A disruption to the either system results in the impairment of a person’s ability to walk. Impairments can be caused by neurological disorders such as stroke and physical conditions like amputation. There is not a standardized method to quantitatively assess the gait asymmetry of affected subjects. The purpose of this research is to understand the fundamental aspects of asymmetrical effects on the human body and improve rehabilitation techniques and devices. This research takes an interdisciplinary approach to address the limitations with current rehabilitation …

The Ecology Of Antibiotic Resistance: Sources And Persistence Of Vancomycin-Resistant Enterococci And Antibiotic Resistant Genes In Aquatic Environments, Suzanne M. Young

USF Tampa Graduate Theses and Dissertations

The growing crisis of antibiotic resistance is a major threat to ecosystems and human health. Infections caused by known and emerging antibiotic resistant pathogens are on the rise globally, with approximately 700,000 deaths per year caused by antibiotic resistant bacteria (1). In the United States, infections from antibiotic resistant bacteria cause more than 2 million illnesses and 23,000 deaths (2). Antibiotic resistant bacteria and antibiotic resistance genes are released into aquatic ecosystems through hospital waste, residential sewer lines and animal agricultural waste streams. Animal agriculture accounts for approximately 70% of antibiotic use in the United States (3). In agricultural ecosystems, …

Lexical Stress Features Affecting The Recognition Of English Loanwords In Korean By Native English Hearers, Yunhyun Lee

USF Tampa Graduate Theses and Dissertations

Unlike some Asian languages (e.g., Korean), English has lexical stress manifested by four acoustic features: duration, intensity, F0 (pitch), and vowel quality. Lexical stress has been known to have significant influences on native English speakers’ recognition of spoken words. According to Cutler (2015), lexical stress has both suprasegmental and segmental features: Suprasegmental features include duration, intensity, and F0 while vowel quality is considered a segmental feature. However, it is still unclear which lexical features are more responsible for spoken word recognition. This study examined which features, suprasegmental features or vowel quality of English, are a more significant influencer in spoken …

Further Evaluation Of Treatments For Vocal Stereotypy: Response Interruption Redirection And Response Cost, Kiersty Mcnamara

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to expand on research by evaluating the effects of response interruption redirection and response cost alone to reduce vocal stereotypy and to evaluate whether response cost increases the effectiveness of response interruption redirection. Treatment phases included response interruption redirection, response cost, and response interruption redirection plus response cost. We saw high rates of vocal stereotypy during baseline, toy baseline, and pre-intervention phases. During all treatment phases, we saw substantial decreases in stereotypy. For two of the three participants response interruption redirection and response cost was a slightly more effective treatment suggesting that using response …

Evaluating Small-Scale Simulation For Training Firearm Safety Skills, Trevor Maxfield

USF Tampa Graduate Theses and Dissertations

There is limited research using small-scale simulation in applied behavior analysis. We used small-scale simulation to train firearm safety skills to 3 to 5-years-old children and assessed whether the skills generalized to the natural environment through in situ assessment. Three participants completed the training and all participants learned the safety skills from simulation training. Two of the participants acquired the safety skills after the first simulation training and the third participant required one booster training before demonstrating the safety skills in the natural environment.

Effect Of Exergaming On Physical Activity Of Adults With Intellectual Disabilities, Jennifer Dawn Vergara

USF Tampa Graduate Theses and Dissertations

Physical inactivity is the fourth leading risk factor related to death (World Health Organization, 2016a). Thus, the World Health Organization (2016a) suggests engaging in at least 150 min of physical activity (PA) throughout the week. Many individuals with intellectual disabilities (ID) engage in sedentary lifestyles that raise concern about their long-term health. The purpose of this study was to evaluate the effects of exergaming on PA and intensity when implemented with adults with ID. Four adult males diagnosed with ID were recruited. During the scheduled phase, percent occurrence of PA was variable across both conditions for each participant. During the …

Household Food Waste Prevention In Malaysia: An Issue Processes Model Perspective, Syahirah Abd Razak

USF Tampa Graduate Theses and Dissertations

Food waste has been a worldwide concern for several decades but this problem is relatively new in the Malaysian context due to the increasing amount of food waste in recent years. Thus, the goal of the study is to provide the basic information of knowledge and involvement level, and their interaction in food waste prevention among households in Malaysia. This study seek to further mass communication research in the area of food waste. The Hallahan’s Issues Processes Model was used within this study in order to determine the relationship between knowledge, involvement, and food waste prevention behavior. The convenience sampling …

Psychopathic Traits, Gender, And Sexual Motivations: Paths To Sexual Coercion, Amy M. Hoffmann

USF Tampa Graduate Theses and Dissertations

Although evidence suggests that both men and women perpetrate sexual coercion, the majority of work has traditionally focused on men as perpetrators and women as victims. Psy-chological factors, including psychopathic traits and sexual motivations, have been proposed to characterize sexually coercive men. However, the sparse existing research using female samples suggests that these models may not adequately characterize female sexual coercers. In particular, although there is evidence that sexual motivations may mediate the relationship between psycho-pathic traits and coercion perpetration, there is a dearth of information regarding gender as a po-tential moderator of these mediating paths. To improve our understanding …

An Exploration Of Social Determinants Of Health Constructs As Potential Mediators Between Disability And Condom Usage, Karina Pineda

USF Tampa Graduate Theses and Dissertations

There is limited knowledge on the sexual health behaviors of young adults with physical disabilities, as people with disabilities have traditionally been treated homogenously without acknowledgement of the potential differences between disability types. The objective of this study was twofold. The first goal was to take a novel approach by guidance of the Social Determinants of Health (SDOH) framework to compare how young adults with physical disabilities compare against those without physical disabilities in: 1) vaginal sexual activity, 2) condom usage, and 3) the effect of SDOH factors as potential mediators in predicting unprotected vaginal sex. Relatedly, the second goal …

Water, Sanitation, And Citizenship: Perceptions Of Water Scarcity, Reuse, And Sustainability In Valparaiso De Goias, Brazil, Paola Andrea Gonzalez

USF Tampa Graduate Theses and Dissertations

Access to reliable water and sanitation are two important goals to improve livelihoods around the world. Providing access to improved and safe water resources that are equitable and appropriate to local needs is important to improve sustainability long-term. In addition, framing access to water and sanitation as basic human rights is often used as a rationale in developing new water, sanitation, and hygiene interventions in developing countries around the world. But not all countries consider access to safe water and sanitation as a human right. In the thesis, the politics of improving and investment in water access and sanitation provision …

Differential Reinforcement Of Other Behavior Versus Response Cost: Effects Of Immediate And Delayed Consequences In Token Economies, Faith Reynolds

USF Tampa Graduate Theses and Dissertations

Token economies incorporating differential reinforcement of other behavior and response cost have been shown to be effective for decreasing behavior. However, these token economies in the literature have differed in their findings of the effectiveness of and preference for differential reinforcement of other behavior and response cost. They have also differed in the way they implemented token economies including factors such as the immediacy of a consequence and the use of verbal feedback. Therefore, we examined two versions of response cost, one in which the contingency is experienced immediately and one in which it is experienced at end of an …

Autism And The Performing Arts: Using Bst To Teach Dance To Children With Asd, Calyn Freed

USF Tampa Graduate Theses and Dissertations

Behavioral skills training (BST) has been proven effective in helping children with autism spectrum disorder (ASD) acquire new skills. Little research had been done to evaluate the effect of BST on the acquisition of sport skills within this population, and no research exists in regards to using BST to teach dance skills to individuals with ASD. The purpose of this study was to evaluate the effectiveness of BST for teaching dance steps to children diagnosed with ASD. This study used a multiple baseline across behaviors design. The dance movements that were targeted consisted of a tap step, a leap, and …

Perceptions Affecting Tree Valuation: An Analysis Of Recently Sold And Leased Properties In Tampa, Florida, Cody R. Winter

USF Tampa Graduate Theses and Dissertations

The urban forest is a structure that is fluid in both species composition and how it is integrated in our cities and suburban areas. Much like the fluidity in its structure, the urban forest provides ecosystem services and disservices in many forms. These services and disservices can often come in the form of temperature regulation, lower crime rates, and even higher property values. The latter, which is associated with the economic value of trees, is a part of the hedonic pricing literature which suggests that there is a disparity in the value associated with trees to house prices. With the …

Large Area Sintering Test Platform Design And Preliminary Study On Cross Sectional Resolution, Christopher J. Gardiner

USF Tampa Graduate Theses and Dissertations

Additive manufacturing involves the layer-wise patterned addition of material to create 3D parts, allowing for parts with complex geometries that traditional subtractive manufacturing processes cannot create, while offering good value for low run production parts by eliminating the cost of tooling. Large Area Sintering is a form of powder based additive manufacturing where entire layer cross sections are heated and fused in a single continuous exposure process. This layer by layer powder sintering process is similar to selective laser sintering, but by heating the cross section at a slower and controllable rate there is an opportunity to achieve tighter control …

Diagnostic Divisions Of Eating Disorders: A Critical Analysis, Channah A. Leff

USF Tampa Graduate Theses and Dissertations

The objective of this thesis is to critically examine the diagnostic divisions of eating disorders as proposed within the Diagnostic and Statistical Manual of Mental Disorders (DSM-5). I focus on Anorexia Nervosa, Bulimia Nervosa, Binge Eating Disorder, and Other Specified Feeding or Eating Disorder (OSFED), although there were several new categories issued in 2013. Using person-centered ethnographic interviews, focus groups, participant observation, and autoethnography, I collected qualitative data to highlight how disordered eaters perceive themselves and their behaviors in relation to their diagnoses. I recruited participants in Boston, MA from Eating Disorders Anonymous (EDA), a decentralized network of support groups …