Digital Commons Network^™

Digital Holographic Measurement Of Nanometric Optical Excitation On Soft Matter By Optical Pressure And Photothermal Interactions, David C. Clark

USF Tampa Graduate Theses and Dissertations

In this dissertation we use digital holographic quantitative phase microscopy to observe and measure phase-only structures due to induced photothermal interactions and nanoscopic structures produced by photomechanical interactions. Our use of the angular spectrum method combined with off-axis digital holography allows for the successful hologram acquisition and processing necessary to view these phenomena with nanometric and, in many cases, subnanometric precision. We show through applications that this has significance in metrology of bulk fluid and interfacial properties.

Our accurate quantitative phase mapping of the optically induced thermal lens in media leads to improved measurement of the absorption coefficient over existing …

Can You Believe She Did That?!:Breaking The Codes Of "Good" Mothering In 1970s Horror Films, Jessica Michelle Collard

USF Tampa Graduate Theses and Dissertations

The threats found in horror films change with time, each decade consisting of threats that were most frightening for the time period. Horror film scholars, such as Andrew Tudor, determined that in 1970s horror films the threat has migrated from external forces into the home and the family. Invading aliens and monsters were thrown replaced by psychosis and evil children. This notion of making the familiar unfamiliar and threatening is paralleled in concerns addressed during the second-wave of feminism; women were making the normative and familiar idea of mother unfamiliar as they migrated from the private and into the public …

Talking About Talk: The Problem Of Communication As An Object Of Study In Public Participation Research, Lauren Leigh Cutlip

USF Tampa Graduate Theses and Dissertations

When citizens participate in risk assessment and decision-making for environmental and other issues that affect members of the public, more robust decisions may be made. Public participation in policy decisions is not only more democratic, but it also enables members of the public to contribute valuable expertise to the decision-making process. However, the development of an effective forum for such participatory projects has been difficult. Participation mechanisms that foster dialogue and interactive exchange between participants have been regarded as the most beneficial, but the practical application of these mechanisms has been observed to be problematic. The goal of this study …

Variability In Hydrology And Ecosystem Properties And Their Role In Regulating Soil Organic Matter Stability In Wetlands Of West-Central Florida, Sharon Jean Feit

USF Tampa Graduate Theses and Dissertations

Soil organic matter (SOM) provides many ecosystem services that are necessary for continued ecosystem function. The accumulation of SOM in an ecosystem is a function of its persistence time which can range from days to thousands of years. Ecosystem properties including dominant vegetation type, soil texture, and soil moisture in various habitats can regulate the persistence time of SOM.

Wetlands, because of their associated ecosystem properties, promote SOM accumulation, but little has been done to determine the ecosystem properties that regulate its persistence over time. In west-central Florida, urbanization and increased water demands have suppressed water tables in isolated wetland …

A Multi-Perspective Exploration Of A Cross-Age Tutoring Initiative: An Analysis Of The Responses Of All Students, Ann Elizabeth Gillies

USF Tampa Graduate Theses and Dissertations

This exploratory study assessed the effectiveness of a cross-age tutoring intervention on adaptive behavior goals of three PreKindergarten/Kindergarten-aged students with labels of autism spectrum disorder. Data were collected in an inclusive environment; the school library. Three fourth grade general education cross-age tutors were trained to use a simple, naturalistic least-to-most prompting strategy to support the young students with individualized adaptive behavior goals while in the library. A mixed method design was utilized in this study; a quantitative single case multiple baseline across participants design to show performance outcomes of the young students as a result of the tutoring intervention, and …

Tagline: Information Extraction For Semi-Structured Text Elements In Medical Progress Notes, Dezon K. Finch

USF Tampa Graduate Theses and Dissertations

Text analysis has become an important research activity in the Department of Veterans Affairs (VA). Statistical text mining and natural language processing have been shown to be very effective for extracting useful information from medical documents. However, neither of these techniques is effective at extracting the information stored in semi-structure text elements. A prototype system (TagLine) was developed as a method for extracting information from the semi-structured portions of text using machine learning. Features for the learning machine were suggested by prior work, as well as by examining the text, and selecting those attributes that help distinguish the various classes …

"People...Do Not Come With Standardized Circumstances": Toward A Model For An Anthropology Of E-Government, Marc K. Hebert

USF Tampa Graduate Theses and Dissertations

Many Americans appreciate the availability and ease of using government websites to conduct their business with the state. What then of the most vulnerable in society? How do they access and use a standardized application process for government assistance, considering their potential resource, educational and physical constraints? Many go to public libraries and non-governmental organizations (NGOs), which shifts the responsibility to help applicants from the government agency administering the program to local actors whose primary duties lie elsewhere.

The aim of this research is to document the experiences of three groups of people, primarily located in a central Florida, urban …

Comparative Outcomes Assessment Of The C-Leg And X2 Knee Prosthesis, Michael Jason Highsmith

USF Tampa Graduate Theses and Dissertations

Background

There are more than 300,000 persons in the U.S. living with transfemoral amputation (TFA). Persons with TFA use a knee prosthesis for gait and mobility. Presently, the C-Leg microprocessor knee prosthesis is the standard of care. C-Leg has significantly improved safety and cost efficacy and has created modest gains in gait efficiency. Recently, a new prosthesis has introduced a new sensor array and processor that reportedly improves knee motion, stair function and standing stability. Early claims of the reported functional benefits of the new Genium knee (formerly X2) have not been validated in a rigorous clinical trial. Therefore, the …

Perceptions Of A Learning Organization And Factors Within The Work Environment That Influence Transfer Of Training In Law Enforcement, Yvonne Olive Hunter-Johnson

USF Tampa Graduate Theses and Dissertations

Abstract

The purpose of this study was to determine law enforcement officers' perception of factors within the workplace that influence transfer of training and their perception of the organization being a learning organization. The study actually had three parts. First, it intended to investigate the perception of law enforcement officers regarding factors within their work environment that influence or impede the transfer of training process (specifically, organizational support and transfer climate/culture). Second, it intended to determine the perception of law enforcement officers concerning the promotion of their organization's learning practices, learning culture, and the continuous learning environment at an individual, …

Effects Of Gps Error On Animal Home Range Estimates, Garrett Hyzer

USF Tampa Graduate Theses and Dissertations

This study examined how variables related to habitat cover types can affect the positional accuracy of Global Positioning System (GPS) data and, subsequently, how wildlife home range analysis can be influenced when utilizing this inaccurate data. This study focused on measuring GPS accuracy relative to five habitat variables: open canopy, sparse canopy, dense canopy, open water, and building proximity. The study took place in Hillsborough County, in residential areas that contain all of these habitat types. Five GPS devices, designed for wildlife tracking purposes, were used to collect the data needed for this study. GPS data was collected under the …

Increasing Parental Involvement In Early Childhood Education, Kendall Jeffries

USF Tampa Graduate Theses and Dissertations

Parental involvement during preschool has been linked with stronger pre-literacy skills, acquisition of mathematical skills, well-developed social skills, and positive attitudes toward school (Arnold, Zeljo, Doctoroff, & Ortiff, 2008; Powell, Son, File, & San Juan, 2010). Parents' active involvement in their children's learning is a recommended strategy in engaging families in children's education experiences (Henderson & Mapp, 2002). The purpose of the current study was to measure the impact of parents' active participation in a parent-directed early literacy intervention on parental home-based involvement, school-based involvement, and home-school conferencing among Head Start parents and their preschool-aged children. The study used a …

Community As Metaphor: Dialectical Tensions Of A Racially Diverse Organization, Joseph Jacob Jenkins

USF Tampa Graduate Theses and Dissertations

In recent years, a sense of community has declined throughout the United States. Common Point Community Church has responded to this trend by prioritizing "community" as an organizational metaphor. The present study explores how this metaphor is co-constructed through the communication practices of current organizational leaders and members. I begin this process, first, by positioning the study within existing literature on institutional theory, institutional legitimacy, community, community of practice, social construction of race, sensemaking, organizational metaphor, tension-centered approach, and dialectic theory. Building upon more than three years of ethnographic field work, I then outline the study's context and methodology. Next, …

Teachers' Narratives Of Experience With Social Class, Natalie Elizabeth Keefer

USF Tampa Graduate Theses and Dissertations

Equality of educational opportunity has been a long elusive goal of public education in the United States. This narrative, phenomenological study conducted inquiry into how five teachers in Tampa, Florida construct meaning about social class and academic achievement based on their life experiences as members of a class-based society. Data produced descriptive, narrative stories that contextualize how meaning is constructed about social class based on participants' life experiences. This line of inquiry provides relevant insight into teachers' understandings of social class which may influence the provision of equal educational opportunities to all students. The following study includes a comprehensive analysis …

Semantic Feature Distinctiveness And Frequency, Katherine Marie Lamb

USF Tampa Graduate Theses and Dissertations

Lexical access is the process in which basic components of meaning in language, the lexical entries (words) are activated. This activation is based on the organization and representational structure of the lexical entries. Semantic features of words, which are the prominent semantic characteristics of a word concept, provide important information because they mediate semantic access to words. An experiment was conducted to examine the importance of semantic feature distinctiveness and feature frequency in accessing the lexical representations of young and older adults in an off-line task using features of animals. The McRae, Cree, Seidenberg, and McNorgan (2005) feature norm corpus …

Precipitation Of Phosphate Minerals From Effluent Of Anaerobically Digested Swine Manure, Alex Y. Lin

USF Tampa Graduate Theses and Dissertations

Swine production represents approximately 40% of the world's meat production, and its wastes contain high concentrations of organic carbon, nitrogen (N), and phosphorus (P). Anaerobic digestion is an increasingly popular technology for treating animal wastes while simultaneously generating energy. Its propagation and ability to solubilize organic N and P make adding a struvite recovery process attractive. Recovering struvite (MgNH4PO4) from anaerobically digested swine waste can address global P shortages, meet P discharge guidelines, and produce slow-release fertilizer, which can be sold for revenue.

Anaerobic digesters were operated with at organic loading rates of 3.4-3.9 g volatile solids per liter per …

Schooling, Community, And Identity: The Perspectives Of Muslim Girls Attending An Islamic School In Florida, Vanessa Martinez

USF Tampa Graduate Theses and Dissertations

As the number of Islamic institutions increases in America, the need for greater understanding of the Muslim community, and the challenges faced by this minority, increases as well. This project seeks to provide such knowledge by exploring one of these rapidly growing institutions founded and funded by Muslims, private Islamic schools. Absent from media and literature is an understanding of Islamic schools and the experiences of youth as their attendees. This project addresses this gap through an ethnographic focus on female students at one Islamic school. Data was collected via interviews, focus groups, observation, and participant observation. This student-centered approach …

"Planting Wholesome Seeds": Organic Farming And Community Supported Agriculture At Sweetwater Organic Community Farm, Philip R. Mcnab

USF Tampa Graduate Theses and Dissertations

Sweetwater Organic Community Farm is an organic farm and environmental education center located in Tampa, Florida. The farm employs the community supported agriculture (CSA) model, in which members pay a single fee before the growing season begins and receive a weekly or biweekly share of the ongoing harvest in return. Using multiple ethnographic methods, this research aimed to understand the daily operations at Sweetwater as well as the perceptions of staff and CSA members. Findings indicated that there were myriad perceived advantages of organic agriculture but also imposing challenges that needed to be overcome. Moreover, staff members acknowledged the challenges …

Development And Application Of Its Operations Evaluation Models (Itsoems), Gummadavelly Narasimha Murthy

USF Tampa Graduate Theses and Dissertations

Intelligent Transportation Systems (ITS) play an important role in supporting motorists and first responders to handle major incidents, hazmat spills, security measures and other emergency operations. Increasingly, technology advancements and applications are providing invaluable integration opportunities to interconnect safety, maintenance, ITS, traffic operations, facilities, and transportation equipment programs to maximize available resources and achieve efficiency in transportation operations.

This research focuses on one of the prominent ITS devices: Dynamic Message Signs (DMS) operations. Using real time incident management operations data and ITS operations data, an attempt is made to develop ITS Operations Evaluations Models (ITSOEMs) that are capable of quantifying …

Graphene Casimir Interactions And Some Possible Applications, Anh Duc Phan

USF Tampa Graduate Theses and Dissertations

Scientific development requires profound understandings of micromechanical and nanomechanical systems (MEMS/NEMS) due to their applications not only in the technological world, but also for scientific understanding. At the micro- or nano-scale, when two objects are brought close together, the existence of stiction or adhesion is inevitable and plays an important role in the behavior operation of these systems. Such effects are due to surface dispersion forces, such as the van der Waals or Casimir interactions. The scientific understanding of these forces is particularly important for low-dimensional materials. In addition, the discovery of materials, such as graphitic systems has provided opportunities …

Walking In The Land Of Cars: Automobile-Pedestrian Accidents In Hillsborough County, Florida, Marc Aaron Poling

USF Tampa Graduate Theses and Dissertations

Analyses of traffic accidents are often focused on the characteristics of the accident event and hence do not take into account the broader neighborhood contexts in which accidents are located. This thesis seeks to extend empirical analyses of accidents by understanding the link between accidents and their surroundings. The case study for this thesis is Hillsborough County, Florida, within which the city of Tampa is located. The Tampa Bay region ranks very high in terms of accident rates within U.S. metropolitan areas and is also characterized by transport policies which favor private automobiles over mass transit options, making it an …

Development Of Interatomic Potentials For Large Scale Molecular Dynamics Simulations Of Carbon Materials Under Extreme Conditions, Romain Perriot

USF Tampa Graduate Theses and Dissertations

The goal of this PhD research project is to devise a robust interatomic potential for large scale molecular dynamics simulations of carbon materials under extreme conditions. This screened-environment dependent reactive empirical bond order potential (SED-REBO) is specifically designed to describe carbon materials under extreme compressive or tensile stresses. Based on the original REBO potential by Brenner and co workers, SED-REBO includes reparametrized pairwise interaction terms and a new screening term, which serves the role of a variable cutoff. The SED-REBO potential overcomes the deficiencies found with the most commonly used interatomic potentials for carbon: the appearance of artificial forces due …

Responses To Chemical Exposure By Foraminifera: Distinguishing Dormancy From Mortality, Benjamin James Ross

USF Tampa Graduate Theses and Dissertations

The Deepwater Horizon blowout in 2010 released an estimated 4.9 million barrels of crude oil into the Gulf of Mexico in the 83 days between the initial explosion and the capping of the well. Response included extensive use of Corexit© oil dispersant. Although South Florida was spared exposure by currents, this event highlights the need for effective bioassay organisms for coral reefs. Amphistegina spp. are benthic foraminifers that host diatom symbionts in a relationship similar to that of coral and their zooxanthellae. Amphistegina spp. occur abundantly in reef communities nearly worldwide, are easily collected and maintained in culture, and are …

Cyberwar And International Law: An English School Perspective, Anthony F. Sinopoli

USF Tampa Graduate Theses and Dissertations

Cyberwar challenges future endeavors of state security. As technological capability has improved, and access to information has become more widespread the importance of the issue in today's ever-globalizing world grows each day. A primary objective is to evaluate the place of cyber-warfare against nation-states and any repercussions under an international law paradigm. Utilizing an English School perspective, emphasis will be applied to the argument that disruptive circumstances could come to fruition if international conventions are not created to bring consensus and order among nation-states on this subject. This study hypothesizes that a future application could be an agreement under international …

Use And Development Of Computational Tools In Drug Discovery: From Small Molecules To Cyclic Peptides, Daniel Navarrete Santiago

USF Tampa Graduate Theses and Dissertations

The scope of this work focuses on computationally modeling compounds with protein structures. While the impetus of drug discovery is the innovation of new therapeutic molecules, it also involves distinguishing molecules that would not be an effective drug. This can be achieved by inventing new tools or by refining old tools. Virtual screening (VS, also called docking), the computational modeling of a molecule in a receptor structure, is a staple in predicting a molecule's affinity for an intended target. In our Virtual Target Screening system (also called inverse-docking), VS is used to find high-affinity targets, which can potentially explain absorption, …

Two Essays On Corporate Governance, Yuwei Wang

USF Tampa Graduate Theses and Dissertations

This dissertation includes two related chapters that investigate corporate governance. In the first chapter, we examine the effectiveness of board monitoring on CEOs. It is widely believed that outsider boards are better monitors. In fact, regulations now require that the board of directors of publicly traded firms be composed of a majority of independent directors (or outsiders). However, this paper documents that an insider-dominated board can monitor the CEO just as well as an outsider board can when the firm's CEO is hired from outside. The results suggest that what matters is not so much as the structure of the …

Changes In Attitudes And Behaviors Toward Physical Activity, Nutrition, And Social Support For Middle School Students Using The Afit App As A Suppliment To Instruction In A Physical Education Class, Thomas Andrew Watterson

USF Tampa Graduate Theses and Dissertations

ABSTRACT

Finding ways to improve nutritional and physical activity components with today's adolescents is a significant problem. The obesity epidemic is over 10 years old and little research has been done on successful interventions that motivate today's students using the latest technology. A total of 140 middle school students and four physical education teachers participated in a 4-week study using a newly created application (AFIT app) for supplemental teaching in and out of the classroom. Combining a theoretical framework of Self-Determination and motivating strategies implored in today's mobile technology, significance was found using the PACE (2001) instrument in fruits and …

"Are We Supposed To Be The Guy On The Horse?" A Case Study On The Use Of Political Cartoons In The American History Classroom, James Manuel Duran

USF Tampa Graduate Theses and Dissertations

Recent reports on the media saturation experienced by the twenty-first century student have brought about an increased interest in focusing attention on the issue of visual literacy in today's schools. Concepts such as instructional personalization, where approaches to curriculum design and instruction are created to concentrate on the individual strengths of the learner, have been promoted by some as a path to improving overall student performance. Many believe that the content of the Social Studies classroom easily lends itself to a visually stimulating approach and as such is an ideal laboratory to test hypotheses on such an approach. This study …

Development Of A Reliable Metal-Insulator-Metal Bilayer Tunnel Junction For Wideband Detectors, Rudraskandan Ratnadurai

USF Tampa Graduate Theses and Dissertations

Detectors and sensors are an integral part of modern electronics and are crucial to highly sensitive applications. Metal-Insulator-Metal (MIM) tunnel junctions have been explored for the past five decades and are still being investigated due to its wide use of applications such as mixers, capacitors, detectors, rectifiers and energy conversion devices. In this research, various designs of thin film based tunnel junctions have been investigated and the optimum one picked for the purpose of a wide band detector up to 10GHz based on their sensitivities. A modified design with an isolation layer incorporating a self-aligning method to increase fabrication throughput …

A Deadly Way Of Doing Business: A Case Study Of Corporate Crime In The Coal Mining Industry, Charles Nickolas Stickeler

USF Tampa Graduate Theses and Dissertations

To this point, research on corporate crime has been, for the most part, overlooked by mainstream criminology. In particular, corporate violations of safety regulations in the coal mining industry have yet to be studied within the field of criminology. The purpose of this thesis is to examine the crimes of a coal mining corporation, a corporation whose business decisions led to the worst coal mining disaster in forty years, along with the deaths of twenty-nine men. This thesis will utilize a case study format in order to illustrate the crimes committed by this corporation. Previous literature covering the history of …

Using A Goal-Setting And Feedback Procedure To Increase Running Distance, Stephanie Wack

USF Tampa Graduate Theses and Dissertations

Goal-setting procedures have been employed in many different sports, and have been shown to be a beneficial component for enhancing sports performance. For this study, a changing-criterion within multiple-baseline design was used to evaluate a multi-component intervention for increasing running distance for five healthy adults. The intervention consisted of goal setting with performance feedback. Participants set a short-term goal each week and a long-term goal to achieve upon completion of the study. The study incorporated the use of the Nike^TM + SportKit for automated recording of the distance of each run. Results of the current study demonstrated for all …