Digital Commons Network^™

Resource Recovery Through Halophyte Production In Marine Aquaponics: An Evaluation Of The Nutrient Cycling And The Environmental Sustainability Of Aquaponics, Suzanne Boxman

USF Tampa Graduate Theses and Dissertations

Aquaculture, the farming of aquatic animals and plants, is an important component of global food production, which supplies a nutritious protein source for millions of people. Interest in improving the sustainability of aquaculture has led to the development of aquaponics in which fish production is combined with plant production to create zero-discharge systems. A need for more fundamental science and engineering research on marine aquaculture and growing interest in production of halophytes motivated this novel research on marine aquaponics. One objective was to evaluate the growth and nutrient removal capacity of halophytes in marine aquaponics. Bench-scale studies were conducted to …

The Relationship Between Social Networks, Exchange And Kids’ Food In Children’S Peer Culture, Stephanie Tillman Melton

USF Tampa Graduate Theses and Dissertations

This study investigates children’s peer culture, social networks and the role that kids’ food plays in peer exchanges during middle childhood. During this stage children develop social competencies as they join peer groups with other children and become socialized into children’s peer culture. In order to immerse myself within children’s culture, I conducted ethnographic fieldwork at two afterschool programs providing care for elementary school children. I investigated friendships, social networks and exchanges among third through fifth grade children at the programs. The study included participant observation and participatory group interviews with a sample of the children at both sites. The …

The Relationship Of Childhood Stress To Adult Health And Mortality Among Individuals From Two U.S. Documented Skeletal Collections, Late 19Th To Early 20Th Centuries, Rhonda Coolidge

USF Tampa Graduate Theses and Dissertations

Although the association between social inequality and poor adult health is well established, the mechanisms by which inequality is translated into poor adult health are less clear. Increasingly, evidence suggests that many adult health problems and health disparities have their origins in early life; the developmental origins of health and disease (DOHaD) hypothesis provides an explanatory mechanism linking adverse early life conditions with permanent structural or functional changes that increase the risk for disease. This hypothesis is consistent with bioarchaeological research noting reduced lifespan among individuals exhibiting signs of childhood stress.

The principal aim of this dissertation is to contribute …

Reframing The Academic Research Library In The U.S.: Perceptions Of Change From Library Leaders, Victoria L. Stuart

USF Tampa Graduate Theses and Dissertations

During the past five years (2010-2015), U.S. universities experienced a simultaneous downturn in financial support along with rapid changes in technology and increased demand for accountability. Academic libraries, among the most central and visible units in the university system, were often at the forefront of financial cutbacks and increased pressure to demonstrate both unit effectiveness and closer alignment with the overall institutional mission. Little research existed to document academic libraries’ changes during this volatile period in history, or how the role of the academic library as part of the university system evolved during this period. Through interviews with the library …

Lipoproteins And Health Outcomes: Cognitive And Physical Function In Older Adults, Marianne Chanti-Ketterl

USF Tampa Graduate Theses and Dissertations

Cardiovascular health is a major determinant of quality of life and mortality, especially in older adulthood. With the world’s oldest population increasing at expedited rates, challenges from cardiovascular conditions and its implications are spawning. Although it is well known that dyslipidemia may lead to cardiac events, less is known about the effects on cognitive and physical function in older adults. Epidemiological studies show that optimizing current preventive strategies even at older ages may reduce the incidence of cardiovascular comorbidity (e.g. hypertension, stroke) and increase quality of life. Determining the association between lipoproteins and cognitive and functional performance in older adults …

Preference Of Chinese Undergraduate Music Majors For Chinese Xi-Qu And Western Opera, Hong Chen

USF Tampa Graduate Theses and Dissertations

The purposes of this study were to explore the preference of the Chinese undergraduate music majors (N = 27) for Chinese Xi-Qu and Western opera audiovisual examples, the reasons for preference, influence of familiarity on preference, and the relationship between preference ratings and the emotions as detected by FaceReader. The mixed research method, convergent parallel design, was used to explore this topic in depth. As Xi-Qu and opera integrate multiple art forms, eight audiovisual examples (Xi-Qu, n = 4, opera, n = 4) were selected as the stimuli to show the characteristics of the two genres. The participants watched …

Pragmatic Competence In Efl Context: Suggestions In University Office Hour Discourse, Hatime Ciftci

USF Tampa Graduate Theses and Dissertations

Office hour interactions at universities are one type of communicative activity in which international instructors and their Turkish EFL students are involved as a form of academic or institutional discourse (Drew & Heritage, 1992). In such real world communication, both parties employ several linguistic strategies and attend to various interactional goals to address the academic concerns at hand (Chiang, 2011; Chiang & Mi, 2008; Limberg, 2007; 2010; Reindhart, 2010; Skyrme, 2010). Embracing a discourse analytic approach, this study investigated the primary functions and topics of office hour interactions; discourse organization of office hour interactions with regard to the features of …

An Investigation Of The Relationship Between Face-To-Face Orientations, Instructor Verbal Immediacy Behaviors, And Persistence In Online Courses, Donald Painter, Jr.

USF Tampa Graduate Theses and Dissertations

The persistence rate in online classes remains significantly lower than in comparable face-to-face classes. There is a lack of research on strategies to help learners persist in online classes. The purpose of this study was to investigate the relationship between face-to-face orientations, instructor verbal immediacy behaviors, and persistence in online classes. It also explored the relationship between verbal immediacy and student satisfaction. Due to the disagreement in the literature, this study also investigated the relationship between student demographic variables, grade point average, and persistence.

This quantitative study combined both causal-comparative and correlational research methods. The study took place at a …

Direct Solutions To Perceptual Organization Problems, Ravi Kumar Panchumarthy

USF Tampa Graduate Theses and Dissertations

Quadratic optimization problems arise in various real world application domains including engineering design, microeconomics, genetic algorithms, integrated circuit chip design, probabilistic graphical models and computer vision. In particular, there are many problems in computer vision that require binary quadratic optimization such as motion segmentation, correspondences, figure-ground segmentation, clustering, grouping, subgraph matching, and digital matting. The objective of an optimization algorithm can be related to the state of a physical system, where the goal is to bring the initial arbitrary state of the system to a state with minimum possible energy. By recognizing that the Hamiltonian of nanomagnets can be expressed …

Characterization Of Two Novel Gene Regulatory Systems In The Zoonotic Bacterium Bartonella Henselae, Nhan Tu

USF Tampa Graduate Theses and Dissertations

The genus Bartonella contains Gram-negative arthropod-borne bacteria that are found in many small animal reservoirs and are capable of causing human disease. Bacteria utilize a general stress response system to combat stresses from their surrounding environments. In α-proteobacteria, the general stress response system uses an alternate σ factor as the main regulator and incorporates it with a two-component system into a unique system. Our study identifies the general stress response system in the α-proteobacterium, Bartonella henselae, where the gene synteny is conserved and both the PhyR and alternate σ factor have similar sequence and domain structures with other α-proteobacteria. …

The Common Core State Standards: Its Reported Effects On The Instructional Decision Making Of Middle School Social Studies Teachers, Tracy Tilotta

USF Tampa Graduate Theses and Dissertations

The Common Core State Standards (CCSS) for social studies are based on critical thinking and literacy skills. These new mandates are expected to lead to curricular and instructional changes within social studies classes. This qualitative study explored how the CCSS might have impacted the curricular and instructional decision-making of middle school social studies teachers and ultimately how the CCSS might affect a teacher’s gatekeeping role. As the CCSS initiative is fairly new, there is little research on the instructional practices being used to support the needs of teachers implementing these new standards in their classrooms as well as the processes, …

The Effect Of Colorist Images On Appearance Concerns Of Black Women, Leah Boepple

USF Tampa Graduate Theses and Dissertations

American culture supports a colorist system that values lighter skin tones in women of color, and these norms are communicated in some part by images present in our society. Previous research has not explored the impact that colorist images may have on the psychological health and appearance concerns of women of color. The purpose of the current study was to determine whether exposure to images of Black women who more closely meet colorist beauty standards (i.e., lighter skin) would negatively impact women’s psychological health and general appearance concerns. It was hypothesized that participants exposed to colorist images of Black women …

Molecular And Phenotypic Studies Validating The Role Of The Ecdysone Receptor In The Human Parasite Brugia Malayi, Amruta Mhashilkar

USF Tampa Graduate Theses and Dissertations

Filariasis and onchocerciasis are debilitating diseases affecting 120 million people globally. The massive socio-economic impact of these diseases energized the international community to declare a goal of eliminating filariasis 2020. This resulted in a dramatic increase in the efforts to eliminate filariasis and onchocerciasis, employing a strategy of mass drug administration (MDA). However, these programs rely upon the small arsenal of drugs. This leaves these programs vulnerable to failure in the face of developing resistance and local intolerance to the current drug regimens. Thus, new drugs against these infections are critically needed. A homologue of the ecdysone receptor (EcR), a …

Content Abuse And Privacy Concerns In Online Social Networks, Md Imrul Kayes

USF Tampa Graduate Theses and Dissertations

Online Social Networks (OSNs) have seen an exponential growth over the last decade, with Facebook having more than 1.49 billion monthly active users and Twitter having 135,000 new users signing up every day as of 2015. Users are sharing 70 million photos per day on the Instagram photo-sharing network. Yahoo Answers question-answering community has more than 1 billion posted answers. The meteoric rise in popularity has made OSNs important social platforms for computer-mediated communications and embedded themselves into society’s daily life, with direct consequences to the offline world and activities. OSNs are built on a foundation of trust, where users …

Near-Field Microwave Microscopy For Surface And Subsurface Characterization Of Materials, Maria Fernanda Cordoba Erazo

USF Tampa Graduate Theses and Dissertations

This dissertation presents an investigation on the capabilities of Near-Field Microwave Microscopy (NFMM) for the characterization of surface and subsurface materials. Subsurface characterization refers to the detection, differentiation and imaging of dielectric, and metallic features that are coated with an insulating layer. The design, simulation and modeling, and testing of a dielectric resonator (DR)-based NFMM and a coaxial transmission line resonator-based NFMM are discussed in detail in this work. Additionally, materials differentiation and imaging capabilities of each microscope are examined using several bulk samples, liquids, GaAs MMIC circuits, and gold/glass testing patterns.

The 5.7 GHz DR-based NFMM uses a microwave …

#Networkedglobe: Making The Connection Between Social Media And Intercultural Technical Communication, Laura Anne Ewing

USF Tampa Graduate Theses and Dissertations

Preparing students of technical communication in the twenty-first century means training them to rhetorically utilize a wide variety of online tools. Technical communicators are now required to employ social media applications on a daily basis to communicate with clients, consumers, colleagues, and other organizations. These online modes have also opened the door to global communication wider and continue to present opportunities and challenges to technical communicators worldwide. Using Japan as a model, this dissertation sought to demonstrate a rhetorical exigency for teaching intercultural social media communication strategies to future technical communicators in the United States. The goal of this dissertation …

Hepatic Nutrient And Hormonal Regulation Of The Pancreatic-Derived Factor (Pander) Promoter, Whitney Ratliff

USF Tampa Graduate Theses and Dissertations

PANcreatic-DERived factor (PANDER, FAM3B) has been shown to regulate glycemic levels via interactions with both pancreatic islets and the liver. Although PANDER is predominantly expressed from the endocrine pancreas, recent work has provided sufficient evidence that the liver may also be an additional tissue source of PANDER production. At physiological levels, PANDER is capable of disrupting insulin signaling and promoting increased hepatic glucose production. As shown in some animal models, strong expression of PANDER, induced by viral delivery within the liver, induces hepatic steatosis. However, no studies to date have explicitly characterized the transcriptional regulation of PANDER from the liver. …

Now, We Hear Through A Voice Darkly: New Media And Narratology In Cinematic Art, James Anthony Ricci

USF Tampa Graduate Theses and Dissertations

This dissertation explores the intersection of new media and narrative, as it is presented through a cinematic aesthetic. The narrative language of film is analyzed through the theoretical framework of Bakhtin’s concepts of Heteroglossia, Chronotope, and Dialogism. Bakhtin’s ideas of classifying language act as strong tools for demonstrating how cinematic narrative can inform and alter the perception of its spectators. Lev Manovich’s principles of New Media, specifically Variability, Modularity, and Automation are also utilized to demonstrate how cinema is a constantly evolving paradigm.

Chapter one focuses on the theoretical terminology, outlining the conceptual definitions and illustrating their relevance in precise …

Identifying Standards Of Quality In Christian Online Theological Education, Ryan Baltrip

USF Tampa Graduate Theses and Dissertations

Changes in computer and communication technology have sparked an educational revolution. For over 20 years, higher education, as a whole, has been adapting to the changing educational landscape. Christian theological education, which is not immune to changing educational realities, has also been adapting to decentralized educational tendencies and experiencing rapid growth in distance and online learning. Christian theological education appears to be a decade or so behind higher education in its contemporary adaptation to online learning,. Questions that higher education began asking over a decade ago about online learning are now part of the contemporary conversation within Christian online theological …

Precise Detection Of Injection Attacks On Concrete Systems, Clayton Whitelaw

USF Tampa Graduate Theses and Dissertations

Injection attacks, including SQL injection, cross-site scripting, and operating system command injection, rank the top two entries in the MITRE Common Vulnerability Enumeration (CVE) [1]. Under this attack model, an application (e.g., a web application) uses some untrusted input to produce an output program (e.g., a SQL query). Applications may be vulnerable to injection attacks because the untrusted input may alter the output program in malicious ways. Recent work has established a rigorous definition of injection attacks. Injections are benign iff they obey the NIE property, which states that injected symbols strictly insert or expand noncode tokens in the output …

Genre, Justice & Quentin Tarantino, Eric Michael Blake

USF Tampa Graduate Theses and Dissertations

The films of Quentin Tarantino have held a significant influence on modern cinema, and therefore on cinema studies. As such, studies on the social and philosophical implications of his work have appeared over the years, mostly in regards to content. However, with the exception of references to his use of cinematic violence, studies of his technique—i.e., his cinematic style—have been rare, and rarer still have been studies of the social implications that arise from the patterns of his style as well as those his subject matter.

The following thesis seeks to use the concept of Auteur Theory—specifically, that Tarantino …

Understanding How Young People Experience Risk With Online-To-Offline Sexual Encounters: A Second Qualitative Phase For The Ch@T Project, Elizabeth Vp Marwah

USF Tampa Graduate Theses and Dissertations

This study investigates how heterosexual young people understand and manage risks related to meeting sexual partners online in the United States. The purpose of this study is to help inform the development of culturally-appropriate sexual risk communication and health promotion messages for young people by linking public health knowledge of adolescent sexual health and eHealth with anthropological theories of risk. With qualitative data from two rounds of semi-structured interviews and two group interviews with university students in central Florida, this study shows how young people experience and prioritize more social-emotional risks in meeting online-to-offline sexual partners compared to physical risks. …

Understanding Climate Change And Sea Level: A Case Study Of Middle School Student Comprehension And An Evaluation Of Tide Gauges Off The Panama Canal In The Pacific Ocean And Caribbean Sea, Juan Carlos Millan-Otoya

USF Tampa Graduate Theses and Dissertations

The present study had two main objectives. The first was to determine the degree of understanding of climate change, sea level and sea level rise among middle school students. Combining open-ended questions with likert-scaled questions, we identified student conceptions on these topics in 86 students from 7^th and 8^th grades during 2012 and 2013 before and after implementing a Curriculum Unit (CU). Additional information was obtained by adding drawings to the open-ended questions during the second year to gauge how student conceptions varied from a verbal and a visual perspective. Misconceptions were identified both pre- and post-CU among …

School-Based Concussion Management: Implementation Characteristics Of Student Services Personnel, Jeffrey Garofano

USF Tampa Graduate Theses and Dissertations

Concussion is an injury that disproportionately affects children and adolescents and has the potential to negatively impact school performance. Currently, a significant proportion of youth with concussion go unreported due to a lack of effective concussion surveillance procedures. Additionally, many individuals who have daily contact with youth (e.g., parents, teachers) lack training in how to assess or manage a concussion. Schools may be the ideal setting to address both of these problems as they have a high level of access to students and employ personnel (e.g., school psychologists, nurses, social workers, counselors) with experience in assessment and intervention. What is …

Influence Of Water Column Stratification And Nutrient Gradients On The Migratory Behavior Of The Red Tide Dinoflagellate, Karenia Brevis, Matthew Garrett

USF Tampa Graduate Theses and Dissertations

Diel vertical migration (DVM) can offer motile phytoplankton a competitive advantage over other phytoplankton species. DVM has been well documented in the harmful dinoflagellate, Karenia brevis; however, the extent to which changes in nutrient regimes and density stratification modify migration patterns has not been thoroughly investigated. A 2 m experimental column was constructed with sensors and sampling ports at four depths to obtain fluorescence and temperature measurements and discrete water samples. The environmental parameters of the experimental column represented temperature and nutrient conditions found on the West Florida Shelf (WFS), where Karenia blooms frequently occur. Results demonstrated a clear …

At The Intersection Of Human Agency And Technology: Genetically Modified Organisms, James Libengood

USF Tampa Graduate Theses and Dissertations

Since the Neolithic period and the rise of agriculture along Mesopotamia’s “Fertile Crescent,” greater societies have formed thus requiring laws and governance to ensure their continued preservation. The Babylonian Code of Hammurabi is one such example of how agricultural technologies directly created new social and institutional structures in codifying slavery into law, or how mercantile transactions are to be conducted. Similarly, GMOs are the result of modern agricultural technologies that are altering laws and society as a result of their implementation. This transformation informs the central inquiries of my research question: Why are GMOs necessary, and what influences do they …

North American River Otter (Lontra Canadensis) Presence And Habitat Analysis In Florida As Compared To Historical Data, Samantha Wilber

USF Tampa Graduate Theses and Dissertations

North American river otters are considered common in the state of Florida, but their populations have not been studied since the 1980’s. Since that time, Florida’s human population has more than doubled, and many natural areas of Florida have been developed. The aim of this study was to determine the presence or absence of river otters at locations in Florida which they historically inhabited. Forty-six sample sites where otters were historically found were obtained from the Florida Museum of Natural History Mammals Master Database (FMNH MMD). These sites were condensed to two focus areas, in and around Alachua and Collier …

He_Rtland: The Violence Of Neoliberalism, Hector Sotomayor

USF Tampa Graduate Theses and Dissertations

Perhaps, under the consciousness of today, “neoliberalism” has defined our world during the previous and current centuries more than any other socioeconomic system. But the evolution of this ideology, which initially aimed to enhance, or rather, reinvent capitalism and individual freedom, has, in essence, induced an unrecognized problem. I argue that neoliberalism is the catalyst for much of the hostility in this globalized society where tensions and poverty are casualties of individual and corporate prosperity. Because of this revelation, I argue that neoliberalism inadvertently instills violence that is both unseen and gendered. In order to formulate my argument, I introduce …

Let’S Move! Biocitizens And The Fat Kids On The Block, Mary Catherine Dickman

USF Tampa Graduate Theses and Dissertations

This project analyzed First Lady Michelle Obama’s Let’s Move! campaign for how it constructs obesity and health. Let’s Move! is a national internet-based campaign to end childhood obesity. The literature on Let’s Move! is limited and focuses on the privatization and corporatization of children’s physical education in public schools. Taking an intersectional approach to critical fat studies, I use critical discourse analysis to investigate how the language used in the Let’s Move! campaign (re)enforces and (re)signifies cultural notions of fat as a social problem – specifically that fat bodies are diseased, unproductive, and a financial burden. I maintain that the …

Evaluating Corrosion Resistance Of Reinforcing Steel In A Novel Green Concrete, Andrea Carolina Ramirez

USF Tampa Graduate Theses and Dissertations

Reinforced concrete structures are expected to have a long service life with minimal maintenance. Corrosion of reinforcing steel is a major factor in reducing concrete structure lifespan, as corrosion products occupy a larger volume than that of the consumed steel and generate tensile stresses that crack the concrete cover. Procedures to control corrosion in traditional concrete, which is made with Portland-cement (PC), have been well established. However, in recent years novel concrete materials based on alternatives to normally cured PC have been developed in response to global needs to reduce greenhouse gases emissions. In particular, a promising new cement has …