Digital Commons Network^™

Craniometric Ancestry Proportions Among Groups Considered Hispanic: Genetic Biological Variation, Sex-Biased Asymmetry, And Forensic Applications, Meredith L. Tise

USF Tampa Graduate Theses and Dissertations

Today, groups considered Hispanic in the United States consist of populations whose complex genetic structures reflect intermixed diverse groups of people who came in contact during Spanish colonization in Latin America. After coming in contact and wiping out most of the Native Americans who occupied North and Latin America, the Spanish also introduced West African individuals for labor to begin developing crops to be shipped back to Europe, resulting in the Trans-Atlantic African slave trade. These migration events and differential gene flow among males and females that occurred throughout Latin America have led to populations that have been genetically transformed …

Developing An In-Season Predictor Of Commercial Landings For Quota Monitoring In The U.S. Virgin Islands, Mary Janine Vara

USF Tampa Graduate Theses and Dissertations

The lack of timely reporting of commercial fisheries landings interferes with effective management of fisheries in United States Virgin Islands (USVI). Federal law requires that landings be limited to prevent annual catch limits (ACLs) from being exceeded. Previous attempts to predict total landings have used historic data from prior fishing seasons to predict future landings rather than leveraging available in-season data to provide a more real-time prediction of landings. This study presents an in-season model that predicts total landings using partial reports from the current fishing year. This estimate of total landings, including error bounds around that estimate, can then …

Hermes, Technical Communicator Of The Gods: The Theory, Design, And Creation Of A Persuasive Game For Technical Communication, Eric Walsh

USF Tampa Graduate Theses and Dissertations

For my thesis, I have undertaken the creation of a persuasive game to advance a particular argument of the way that work is performed in the field of technical communication. Designed using procedural rhetoric, with an attention to aesthetics, fun, and the qualities that make games viable pedagogical tools, my game has been programmed using HTML5 and JavaScript, and made freely available online at RhetoricalGamer.com. This written document is meant to serve as a supplement to the game, providing a rationale for the use of games in education and in technical communication; a definition of procedural rhetoric and the necessary …

Guaman Poma's Legacy: Snapshots Of Globalization, Identity, And Literacy Through The Urban Amazonian Indigenous Intellectual Lens, Roger Maurice Villamar

USF Tampa Graduate Theses and Dissertations

This dissertation initially utilizes the analogy of an Andean intellectual's magnum opus of resistant visual art and text created in the 1600s, to explore the impact of current global influences on the identity of Awajún and Wampís Amazonian students residing in Lima, the capital city of Perú. The participants in this study are urban Amazonian indigenous intellectuals applying to enter, currently studying in degree programs, or pursuing graduate degrees at local universities of Lima. Using an amalgamation of Photovoice and Photo-Elicitation components, digital photography, open-source applications, and computer technology, participants creatively expressed through their visual discourse what it means to …

Nanodiamond Based Composite Structures For Biosensing Applications, Pedro Javier Villalba

USF Tampa Graduate Theses and Dissertations

This dissertation presents the synthesis and application of nanodiamond based materials for electrochemical biosensors. In this research work, nanodiamond particles have been used to prepare doped and undoped nanocrystalline diamond films, and conducting polymer composites for enhanced biosensing. The performance of the synthetized materials towards sensing applications was evaluated against glucose amperometric biosensing. Besides, cholesterol biosensing was attempted to prove the capabilities of the platform as a generic biosensing substrate.

Biosensors have been proved to provide reliable detection and quantification of biological compounds. The detection of biological markers plays a key factor in the diagnosis of many diseases and, even …

Assessing The Impacts Of Unrestricted Pesticide Use In Small-Scale Agriculture On Water Quality And Associated Human Health And Ecological Implications In An Indigenous Village In Rural Panam[Aacute], Sarah Louise Watson

USF Tampa Graduate Theses and Dissertations

In 2014, the global pesticide industry's projected worth is $52 billion and by 2020, the developing world will make up one-third of the world's chemical production and consumption. Pesticides can have unintended negative consequences for human health and the environment, especially in the developing world where regulations are loose or nonexistent. One country with unrestricted use of pesticides is Panam[aacute], especially in Santa Rosa de Cucunatí. In this indigenous village, small-scale farmers and ranchers spray paraquat, glyphosate, picloram, and 2,4-D at higher elevations than the spring water source of a gravity-fed water system, the river, and the village. The objective …

Investigation Of Energy Alignment Models At Polymer Interfaces, Wenfeng Wang

USF Tampa Graduate Theses and Dissertations

The presented study investigated the Induced Density of Interface States (IDIS) model at different polymer interfaces by using photoemission spectroscopy in combination with electrospray deposition.

In recent years, organic electronics have attracted considerable attention due to their advantages of low-cost and easy-fabrication. The performance of such devices crucially depends on the energy barrier that controls the interface charge transfer. A significant effort has been made to explore the mechanisms that determine the direction and magnitude of charge transfer barriers in these devices. As a result of this effort, the IDIS model was developed to predict the energy alignment at metal/organic …

Skutterudite Derivatives: A Fundamental Investigation With Potential For Thermoelectric Applications, Kaya Wei

USF Tampa Graduate Theses and Dissertations

Thermoelectric devices allow for direct conversion of heat into electricity as well as solid-state refrigeration. The skutterudite family of compounds continues to be of considerable interest both scientifically and technologically due to their unique physical properties, in particular as promising thermoelectric materials. In this thesis, the basic thermoelectric phenomena and some background history on skutterudites will be reviewed. Rhombohedral derivatives of the cubic skutterudite CoSb3, namely Co4-xFexGe6Se6 with x=0, 1, 1.5 (p-type) and rare-earth filled Ce0.13Co4Ge6Se6 and Yb0.14Co4Ge6Se6 (n-type), were synthesized and their synthesis and low temperature transport properties will be discussed.

Reitveld refinement and elemental analysis were used to …

Selected Topics In Foundation Design, Quality Assurance, And Remediation, Danny Winters

USF Tampa Graduate Theses and Dissertations

There are over 602,000 bridges in the United States, of which 12.5% are classified as functionally obsolete and 11.2% are structurally deficient. The functionally obsolete bridges will require expansion or replacement to increase the service capacity of the bridge. The structurally deficient bridges will either need remediation of the load carrying elements which are damaged or deteriorated or will need to be replaced completely. Replacement of the bridges means new construction; new construction means better design and quality assurance to meet the 100+ year service life requirement in place now. Rehabilitation of bridges will require better design and quality assurance …

Leges, Plebiscita, Et Rogationes: Democratization And Legislative Action, 494 - 88 Bc, Eric Wolters

USF Tampa Graduate Theses and Dissertations

This study intends to analyze the importance of institutional trust in the process of democratization. In this particular case, the period from 494 to 88 BC in the Roman republic is examined. The theories of Charles Tilly and Robert Putnam are utilized to more deeply examine the concepts and manifestations of trust and democratization. Using the ideas and theories of these authors together provides a unique insight into the means by which a population comes to trust that government is responsive, and further comes to expect increased responsiveness in the future. Institutional trust as an element of mutually binding consultation …

A Synthesis Approach Of Trp-Like Primary Amine Peptoid Side Chains Used In Cyclic Beta-Hairpin - Like Scaffolds, Josanne-Dee Woodroffe

USF Tampa Graduate Theses and Dissertations

In recent studies it was reported that the D-amino acid containing peptide HYD1 was used in the treatment of necrotic cell death in multiple myeloma cell lines and showed promising biological activity and in vivo activity. It was meaningful to explore strategies for increasing the therapeutic efficacy of HYD1, a linear peptide. These efforts led to the development of MT1-101 (cyclized peptidomimetics), a lead compound that showed increased in vitro activity and in vivo activity. MTI-101 was found to bind the cell adhesion molecule CD44 and induce programmed necrosis in myeloma cell lines. It was important to improve on the …

An Examination Of Motives, Experiences, And Behaviors Of Mmorpg Players, Theresa Lynn Woods

USF Tampa Graduate Theses and Dissertations

Massively multiplayer online role-playing games (MMORPGs) are growing in popularity and use worldwide. This study seeks to explore the motivations and experiences of MMORPG players through an extensive online survey with more than a thousand participants (n=1,422). The findings support a complex relationship between the variables, including the direct effects of motivations and flow on the time invested by players in MMORPG play, as well as the mediated effects of motivation via flow. Causal relationships are examined in addition to the significance of direct and indirect effects on frequency of play, yielding several significant results, including (1) the overwhelming importance …

Troubled Waters: Georgia, Florida And Alabama's Conflict Over The Waters Of The Acf River Basin, Johnny King Alaziz Wong

USF Tampa Graduate Theses and Dissertations

Since 1989, the co-riparian States of Georgia, Florida and Alabama have been locked in an overt and institutionalized conflict to secure access to the waters of the Apalachicola-Chattahoochee-Flint (ACF) River Basin. In 1997, in an effort to end this interstate conflict which had earned the reputation as the longest water conflict in U.S. history, public officials at the federal and state scales agreed to suspend all pending litigation against one another and concurrently deployed a dispute resolution mechanism, known as `compact negotiations,' in the hope of equitably allocating the waters of the ACF Basin. Despite proclamations by public officials, exclaiming …

Spatial And Temporal Extent Of A Subsurface Hydrocarbon Intrusion Following The Deepwater Horizon Blowout, Kathleen Watson

USF Tampa Graduate Theses and Dissertations

The Deepwater Horizon (DWH) oil spill in the Gulf of Mexico (GoM) released an estimated 4.9 million barrels of oil between April 20, 2010 and July 15, 2010. An estimated 36% of the oil formed a neutrally buoyant intrusion, containing both dissolved compounds and oil microdroplets, between 1000 and 1300 m depth. This study used geographic information systems software, and data from water samples that were collected as part of the National Resource Damage Assessment (NRDA), to determine that an area of at least 1,600 km² was exposed to DWH oil. Toxic BTEX (benzene, toluene, ethylbenzene, and …

Numerical Simulation Of Flow In Ozonation Process, Jie Zhang

USF Tampa Graduate Theses and Dissertations

In the last two decades, Computational Fluid Dynamics (CFD) has shown great potential as a powerful and cost-efficient tool to troubleshoot existing disinfection contactors and improve future designs for the water and wastewater treatment utilities.

In the first part of this dissertation two CFD simulation methodologies or strategies for computing turbulent flow are evaluated in terms of the predicted hydraulic performance of contactors. In the LES (large eddy simulation) methodology, the more energetic, larger scales of the turbulence are explicitly computed or resolved by the grid. In the less computationally intensive RANS (Reynolds-averaged Navier-Stokes) methodology, only the mean component of …

Template-Directed Synthesis And Post-Synthetic Modification Of Porphyrin-Encapsulating Metal-Organic Materials, Zhenjie Zhang

USF Tampa Graduate Theses and Dissertations

Metal-organic materials (MOMs) represent an emerging class of materials comprised of molecular building blocks (MBBs) linked by organic linker ligands. MOMs recently attract great attention because of their ability to exhibit permanent porosity, thereby enabling study of properties in the context of gas storage, gas separation, solid supports for sensors, catalysis and so on. Although MOMs have been studied for over 60 years, the porous nature of MOMs was not systematically and widely explored until the early 1990's. This may be one of the reasons why template-directed synthesis of MOMs remains relatively underexplored, especially when compared to other classes of …

An Assessment Of The Emas Pump And Its Potential For Use In Household Water Systems In Uganda, Jacob Daniel Carpenter

USF Tampa Graduate Theses and Dissertations

Rural improved water supply coverage in Uganda has stagnated around 64% for a number of years and at this point more than 10 million rural people do not have access to an improved drinking water source. It has been recognized that progress toward improved water supply coverage and increased service levels may be gained through Government and nongovernmental organization (NGO) support of private investment in household and shared water supplies, commonly known as Self-supply. Self-supply can be promoted by introducing and building local capacity in appropriate and affordable water supply technologies such as hand-dug wells, manually drilled boreholes, low-cost pumps, …

Algae: Opportunities For Biomass Feedstock Production, Wastewater Treatment And Educational Outreach, Trina Cassandra Halfhide

USF Tampa Graduate Theses and Dissertations

Algae are a diverse group of simple organisms that lack roots, stems or leaves and are able to use sunlight, carbon dioxide, and nutrients to produce complex compounds, such as carbohydrates, proteins and lipids. These compounds, especially lipids, are highly sought-after by agricultural, nutraceutical and energy interests. Although there is great potential for algae derived biofuels, there are technical and economic challenges associated with their cultivation. Relevant to this dissertation, the environmental impacts associated with algae cultivation can be reduced by using municipal and agricultural wastewaters as a water and nutrient source. This research was divided into three sections to …

Asymmetric Unilateral Transfemoral Prosthetic Simulator, Tyagi Ramakrishnan

USF Tampa Graduate Theses and Dissertations

amputation, which includes reduced force generation at the knee and ankle, reduced control of the leg, and different mass properties relative to their intact leg. The physical change in the prosthetic leg leads to gait asymmetries that include spatial, temporal, or force differences. This altered gait can lead to an increase in energy consumption and pain due to compensating forces and torques. The asymmetric prosthesis demonstrated in this research aims to find a balance between the different types of asymmetries to provide a gait that is more symmetric and to make it overall easier for an amputee to walk.

Previous …

Effects Of Country Of Origin, Country Animosity And Foreign Product Usage Experiences On Product Judgement: A Study Of Chinese Customers, Cong Sui

USF Tampa Graduate Theses and Dissertations

An experiment was conducted to test hypotheses the country-of-origin, country animosity and product usage experience jointly determine the intention of product purchase. One hundred and seventy Chinese students participated in the experiment and responded to advertisements designed to promot laptop computers manufactured in Germany, Japan, India and the Philippines. Regression analysis results indicate that general product purchase intentions were significantly influenced by participants' pre-existing COO and CA perceptions. The interaction effects between COO, CA and product usage experience were also confirmed, meaning that the effects of COO and CA on purchase intentions were moderated by the variety and frequency of …

Long-Term Mindfulness Meditation: Anxiety, Depression, Stress And Pain, Is There A Connection For Public Health?, Sara Spowart

USF Tampa Graduate Theses and Dissertations

Long-term mindfulness meditation for anxiety, depression, pain and stress has not been adequately investigated in academic literature. The majority of literature in relation to mindfulness meditation and these ailments concerns Kabat-Zinn's Mindfulness-Based Stress Reduction (MBSR) program. This is a short-term 6-8 week program that requires a licensed professional, is limited in availability, high cost, and combines other elements aside from mindfulness meditation, such as yoga, martial arts, group discussion, poetry and other teaching techniques meant to increase mindfulness concentration. Furthermore, efficacy studies, which have assessed the long-term impact of MBSR are inconclusive. Although these studies on long-term practice demonstrate a …

"They're Our Bosses": Representations Of Clients, Guardians, And Providers In Caregivers' Narratives, Dina Vdovichenko

USF Tampa Graduate Theses and Dissertations

The purpose of this study is to examine how various characters are portrayed within the self-narratives of women who are employed to care for adults with disabilities. This research looks at how these women's personal narratives construct characters-their clients (the individuals they provide services for), clients' guardians, and how these women portray themselves as caregivers. Interviews were conducted with eight women who provide paid care services to physically and/or cognitively impaired adults who receive services through the Florida Developmental Disabilities Home and Community Based Services Waiver Program. This program endorses specific expectations about the nature and purpose of caregiving. According …

Drinking Water In The Developing World: Sources Of Fecal Contamination In Pitcher Pump Systems And Measurement Alternatives, Meghan Wahlstrom

USF Tampa Graduate Theses and Dissertations

It has been reported that globally we have achieved Millennium Development Goal (MDG) Target 7C, to halve the proportion of the population without access to safe drinking water; however, there is a major flaw with this statement. While Target 7C calls for access to `safe' drinking water, what is actually being measured and reported is access to an `improved' water source. The World Health Organization (WHO) maintains that they must use this proxy measure because the methods for water quality testing are too expensive and logistically complicated, but by doing so, they may be over reporting safe water coverage.

This …

Exploring The Relationship Of Motivation, Anxiety, And Virtual Worlds In The Experiences Of Two Spanish Language Learners: A Case Study, Amy Katherine Wehner

USF Tampa Graduate Theses and Dissertations

Virtual Worlds (VWs) in foreign language education are slowly becoming more popular. Many studies have looked at the affordances of these worlds and how they affect some aspects of language acquisition. However, it is still unknown to what extent, if any, these virtual worlds can play a role in affecting motivation and anxiety. The purpose of this study was to investigate the relationship between motivation, anxiety and virtual worlds to see how participation in activities within these environments interacted in two individual language learners, Jessica and Melissa.

Using a case study approach, I observed and interviewed the two participants in …

Homochiral Metal-Organic Materials: Design, Synthetic And Enantioseletive Separation, Shi-Yuan Zhang

USF Tampa Graduate Theses and Dissertations

Owing to the growing demand for enantiopurity in biological and chemical processes, tremendous efforts have been devoted to the synthesis of homochiral metal-organic materials (MOMs) because of their potential applications in chiral separation and asymmetric catalysis. In this dissertation, the synthetic strategies for homochiral MOMs are discussed keeping the focus on their applications. Two distinct approaches have been taken to synthesize chiral structures with different topologies and accessible cavities. The chiral MOMs have been utilized in enantioselective separation of racemates.

Chiral variants of the prototypal metal-organic framework MOF-5, δ-CMOF-5 and [lambda]-CMOF-5, have been synthesized by preparing MOF-5 in the presence …

An Analysis Of State Building: The Relationship Between Pashtun 'Para-State' Institutions And Political Instability In Afghanistan, Rebecca Young Greven

USF Tampa Graduate Theses and Dissertations

This study arose from the desire to research the effectiveness of state building policies in Afghanistan. In order to address this topic, I review state building literature and find that state building literature focuses largely on the processes of democratization instead of institution building. In the second part of this dissertation I conduct a comparative case study of Afghanistan during the Soviet and Taliban eras to study the relationship between Pashtun `para-state' institutions (PSI's) and levels of political instability. I hypothesize that Pashtun PSI's compete with central state institutions for popular support thus increasing political instability and reducing state institutional …

Social Media Use During The College Transition, Kevin J. Yurasek

USF Tampa Graduate Theses and Dissertations

Starting college is an exciting and pivotal time for students. During this time, the student will be faced with challenges of his or her social identity and will need to develop or modify identities based on new social situations. Previous research shows that social media play a role in identity development, but there is little information regarding the extent. Are new college students using Facebook during their transition to communicate their new identity/social group to new peers? Are they using Facebook to maintain nostalgia for previous identities/social groups? This information will be valuable to higher education professionals working with these …

A System Dynamics Approach To Integrated Water And Energy Resources Management, Yilin Zhuang

USF Tampa Graduate Theses and Dissertations

Water and energy are two of the most important resources for societal prosperity and economic development. It is clear that water and energy are intrinsically linked together and depend on one another in modern society. To date, however, efforts on water-energy nexus concentrate on quantifying the energy use in water cycle or the water use in energy production. From management perspective, water and energy are still managed separately. Little work has been done to investigate the impacts of the management options associated with one resource on the other and examine the integrated water and energy management options. Accordingly, the overall …

Study Of The Motility Of Biological Cells By Digital Holographic Microscopy, Xiao Yu

USF Tampa Graduate Theses and Dissertations

In this dissertation, I utilize digital holographic microscopy (DHM) to study the motility of biological cells. As an important feature of DHM, quantitative phase microscopy by digital holography (DH-QPM) is applied to study the cell-substrate interactions and migratory behavior of adhesive cells. The traction force exerted by biological cells is visualized as distortions in flexible substrata. Motile fibroblasts produce wrinkles when attached to a silicone rubber film. For the non-wrinkling elastic substrate polyacrylamide (PAA), surface deformation due to fibroblast adhesion and motility is visualized as tangential and vertical displacement. This surface deformation and the associated cellular traction forces are measured …

Science Fiction/Fantasy And The Representation Of Ethnic Futurity, Joy Ann Sanchez-Taylor

USF Tampa Graduate Theses and Dissertations

Science Fiction/Fantasy and the Representation of Ethnic Futurity examines the influence of science fiction/fantasy (SFF) as applied to twentieth century and contemporary African American, Native American and Latina/o texts. Bringing together theories of racial identity, hybridity, and postcolonialism, this project demonstrates how twentieth century and contemporary ethnic American SFF authors are currently utilizing tropes of SFF to blur racial distinctions and challenge white/other or colonizer/colonized binaries. Ethnic American SFF authors are able to employ SFF landscapes that address narratives of victimization or colonization while still imagining worlds where alternate representations of racial and ethnic identity are possible.

My multicultural approach …