Digital Commons Network^™

The Design, Fabrication, And Characterization Of Polymer-Carbon Nanotube Composites, Lanetra Clayton

USF Tampa Graduate Theses and Dissertations

The design, fabrication, and characterization of polymer-carbon nanotube (CNT) composites have generated a significant amount of attention in the fields of materials science and polymer chemistry. The challenge in fabricating composites that exploit the unique properties of the CNT and the ideal processing ability and low cost of the polymer is in achieving a uniform dispersion of the filler in the polymer matrix. This body of work focuses on (1) techniques employed to disperse CNTs into a polymer matrix and (2) the effects of CNTs on the mechanical and electrical properties of the polymer.

Poly (methyl methacrylate) (PMMA), an amorphous …

Early Learning Experiences: Education With Coaching And The Effects On The Acquisiton Of Literacy Skills In Preschool Children, Dale Lynn Cusumano

USF Tampa Graduate Theses and Dissertations

Reading to learn becomes a difficult task for children if they have not become proficient at comprehending written text. It was hypothesized that, for some children, reading difficulties may have been averted had they been reared in homes or participated in early childhood settings where literacy-based activities, interactions, or materials were prevalent. The purpose of this study was to examine the impact that training early childhood educators in researchbased early literacy instructional strategies (within the HeadsUp! Reading curriculum ñ HUR) had on the development of early reading skills in the preschool children they taught. Further examination also identified the impact …

Investor And Worker Response To Corporate Downsizing Of Esop Companies: Wealth Effects, Productivity, And Performance, Jeanean J. Davis-Street

USF Tampa Graduate Theses and Dissertations

Finance, economic and management literature document the reduced agency problems, increased productivity, and greater financial benefits that accrue to firms that adopt Employee Stock Ownership Plans, (ESOPs). The literature also documents the increased agency problems, decreased employee productivity, and poor operating performance that usually accompany corporate downsizing activity. To date, none of the studies have examined the effect that downsizing decisions have on companies with existing ESOP plans; this dissertation fills that empirical void. In this study, two essays are presented that examine the effect of corporate downsizing on ESOP versus non-ESOP firms.

In the first essay, I investigate the …

An Empirical Investigation Of The Predictors Of Self- And Other Reported Marketability: Looking Beyond Human Capital, Rachel Day

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to propose and test a comprehensive model of marketability using both individual and situational predictors. Participants in this study were members of professional associations and were recruited from internet listserves. They consisted of 485 employees and 176 co-workers. This study used a matching technique to link participant and co-worker data and was the first study to assess multiple perspectives of marketability. Results demonstrated the relationships of human capital variables, positivity traits, proactive career behaviors, the environment and industry characteristics on internal and external marketability. Interestingly, not all predictors related to both internal and external …

Fire And Ice In The Age Of Innocence, Alisa Mariva Deborde

USF Tampa Graduate Theses and Dissertations

This study will explore the dichotomy of culture and psychological landscape in Edith Wharton’s The Age of Innocence. To lay the foundation for this study, I first consider how Ms. Wharton often employed dichotomy in her own life: her role as socialite and author, woman of old New York and European maverick, and her life as spouse or beloved. Compartmentalizing her life’s roles prevented her from having to compromise the distinct qualities of each paradigm. Similarly, in The Age of Innocence, Ellen and May are completely opposite representations of life and culture in the 1870’s who cannot happily coexist …

The Impact Of Gender-Role Stereotypes And The Sex-Typing Of The Professor Job On Performance Evaluations In Higher Education, Jay M. Dorio

USF Tampa Graduate Theses and Dissertations

The present study examined the influences of gender-role stereotypes, gender-role congruity, and the sex-typing of the professor job on performance evaluations of university educators in actual classroom settings. Participants used the Schein Descriptive Index (Schein, 1973) to define gender-role stereotypes, characteristics of their professor/instructor, and the characteristics of an “Effective Professor.” Participants used a behavior summary scale (BSS) formatted student assessment of instruction to evaluate their professor’s/instructor’s performance after a full semester of class participation.

It was hypothesized that a pro-male bias would exist in the sex-typing of the professor job, and that combined with the gender-role stereotypes of participants …

The Effects First Language Use Phonological Difficulty Perception Foreign Accented Speech, Astrid Zerla Doty

USF Tampa Graduate Theses and Dissertations

Listener perception of accentedness has been shown to be influenced by experience with L2 (measured by length of residence in US). However, frequency of L1 use and degree of phonological difficulty (defined by the number of non-native phonetic features targeted) may provide more insight into the role of experience in the perception of accentedness.

Three groups of listeners (monolingual English and Spanish [L1] speakers divided into two groups of high and low use of English [L2]) rated the accentedness of bilingual speakers who spoke with varying degrees of accentedness. The speakers read sentences adapted from Magan (1998) to include phonological …

Autonomous Optical Measurements In Bayboro Harbor (Saint Petersburg, Florida), Chunzi Du

USF Tampa Graduate Theses and Dissertations

Estimating with precision coastal marine properties such as primary production, particulate and dissolved carbon, and red tide concentrations is a challenging but important part of marine research. It benefits not only the local communities, but also provides an important input to various global biogeochemical modeling efforts. Due to the complexity of coastal environments resulting from temporal variability of tidal and riverine influences, it is useful to develop and deploy an automated sensor network that provides real-time feedback. It can be used to validate remote sensing models to retrieve in-water constituents, and provide calibration and validation for atmospheric correction of satellite …

Evaluating Positive Behavior Support Plan Implementation In The Home Environment Of Young Children With Challenging Behavior, Michelle A. Duda

USF Tampa Graduate Theses and Dissertations

In recent years, a central focus of the field of early intervention/early childhood special education has been to investigate ways to effectively support young children with challenging behavior and their families (Center for Evidence-Based Practice: Young Children with Challenging Behavior, 2003; DEC, 1999). Positive behavior support (PBS) is one of the most promising evidence-based practices for young children with challenging behavior and their families. The central purposes of PBS are to both help people develop and engage in socially desirable behaviors and to help minimize patterns of socially stigmatizing responding (Koegel, Koegel, & Dunlap, 1996).

Research documenting the utility and …

Development And Validation Of A Systematically Designed Unit For Online Information Literacy And Its Effect On Student Performance For Internet Search Training, Emily K. Dunsker

USF Tampa Graduate Theses and Dissertations

As online learning increases and classroom use of print textbooks are gradually replaced by web-based instruction, what features of online instruction prove beneficial to student learning? The present study has three purposes; (1) To examine the effects of conversion of textbook content to web-based instruction for an extant Internet search course. The researcher examined performance differences of an online textbook to web tutorial compared to a second version that included interactive features found in classroom instruction. (2) To investigate students’ perceptions of material that afforded high levels of learner control and compared responses to a more structured instructional module. (3) …

Design, Construction And Testing Of A Wheelchair-Mounted Robotic Arm, Kevin D. Edwards

USF Tampa Graduate Theses and Dissertations

A wheelchair-mounted robotic arm (WMRA) was designed and built to meet the needs of mobility-impaired persons, and to exceed the capabilities of current devices of this type. The mechanical design incorporates DC servo drive, with all actuator hardware at each individual joint, allowing reconfigurable link lengths. It has seven principal degrees of freedom and uses a side mount on a power wheelchair. A simple, scalable control system allows coordinated Cartesian control, and offers expandability for future research, such as coordinated motion with the wheelchair itself. Design payload including gripper is 6 kg, and the total arm mass with controller is …

Political And Economic News During The Argentine Crisis Of 2000-2002: An Agenda-Setting Analysis Of Major Newspaper Coverage, Mariana Eberle-Blaylock

USF Tampa Graduate Theses and Dissertations

During the years 2000-2002, the Republic of Argentina experienced one of the most, if not the most, devastating social/political/economic crises ever seen. President Fernando de la Rua, elected in 1999, was forced to resign on December 20, 2001, after several months of protests, public demonstrations, and a colossal economic recession. This unprecedented event in the history of the country created a state of chaos and confusion in a frantic population desperately searching for answers.

During the crisis, the media played a vital role in providing the public their daily updates. This study analyzed the newspapers’ role during the crisis using …

Immigrant Vulnerability In High-Risk Industry: A Socio-Occupational Examination Of Counties With Large Meatpacking Plants In Iowa And Nebraska, Mary Patricia Everist

USF Tampa Graduate Theses and Dissertations

The decade of 1990-2000 saw a 53 percent increase in the number of Hispanics to 35.3 million, 20.6 million whom are of Mexican origin, signifying the fastest growing cohort in the U.S. today. This decade has also seen a surge in Hispanic migration to the Midwest region, particularly to communities with large meatpacking plants (LMPPs). Although overall literary consensus underscores the fact that this educationally disadvantaged ethnic group is over-represented in service and labor-based industries, few attempts have been made to empirically link the ir growing participation in high-risk industries like meatpacking with socioeconomic and occupational indicators of immigrant vulnerability. …

Oral/Written Contrast Of Mental State References In Older Children, Jeanne E. Federico

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to determine differences in the use of mental state references by typically developing 9- and 11-year-old children. Following a priming task that emphasized distinctions between physical and mental acts, children watched an 11- minute textless video and then were asked to generate an oral and a written story that focused on the mental states of the multiple characters. Narratives were transcribed, and all mental state references were classified into motivational, experiential, and belief categories. Specific mental state references were also analyzed to determine levels of semantic complexity. The study attempted to answer: 1) whether …

Cuidate: Tourism, Drugs, Sex And Hiv Among Young People In Monteverde, Costa Rica, Andrea Lee Freidus

USF Tampa Graduate Theses and Dissertations

The main goal of this thesis is to understand a community’s perceptions of the potential impact of tourism on the spread of sexually transmitted infections (STIs) including HIV/AIDS in Monteverde, Costa Rica. In particular, I examine the ways in which globalization and increased travel affect the overall health and behavioral patterns among young people from a community reliant on tourism. The impact of migration and population movement on the spread of infectious diseases has already been well documented. Moreover, there is a clear understanding of the impact of sex tourism on the spread of STIs. However, this project seeks to …

Negotiating Artistic Identity Through Satire: Subreal 1989-1999, Anca Izabel Galliera

USF Tampa Graduate Theses and Dissertations

The focus of this research study is on major art works produced during the nineteen-nineties by the Romanian collective subREAL, composed of Calin Dan and Josif Kiraly. The thesis is an alternative to the literal-minded and politically biased Western view typified in two major exhibitions of art from Eastern Europe: Beyond Belief: Contemporary Art from East Central Europe (Chicago, 1995) and After the Wall: Art and Culture in Post-Communist Europe (Sweden, 1999). Both exhibitions presented Post-Communist nations as a monolithic bloc, in which art was primarily a passive reflection of political and social events. It will be demonstrated that …

The Effect Of Conducting Gesture On Expressive-Interpretive Performance Of College Music Majors, Ronald Wayne Gallops

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to examine the effect of non-verbal conducting gesture on musicians’ stylistic response and whether conducting gestures alone elicit consistent musical responses from musicians. Through an analysis that utilized a Gestural Response Instrument (GRI) it was determined that, even if the use of verbal and facial cues were eliminated, some experienced conductors successfully utilized non-verbal conducting gestures to communicate specific musical interpretations. It appeared that musicians responded in specific ways to the musical interpretation of conductors who had command of a variety of conducting gestures. The results illustrated the existence of a perceptual contract that …

A Comparison Of Two Prompting Procedures On Tacting Behavior, Kelley N. Gardner

USF Tampa Graduate Theses and Dissertations

The focus of the current study was to determine the most effective way to teach tacts, or labels, to children with autism who have a language deficit. Two participants were included in the study, which compared two prompting procedures, the verbal prompting condition and the gestural prompting condition.

The verbal prompting condition included presenting a target picture and the verbal prompt, “What is it?” In the gestural prompting condition, a picture was presented, but rather than the verbal prompt, a pointing prompt was offered. Approximately 32 sessions were conducted 2-3 times per week. The effects of the two interventions were …

Imagination In Action: A Phenomenological Case Study Of Simulations In Two Fifth-Grade Teachers’ Classrooms, Cher N. Gauweiler

USF Tampa Graduate Theses and Dissertations

The purpose of this research was to describe how two fifth-grade teachers help students understand social studies and language arts concepts through simulations. I observed two fifth-grade teachers, Lindsey and Paula, as they conducted a simulation focused on the Lewis and Clark expedition. I spent 100 hours over a period of eight weeks in the teachers’ classrooms. The following research questions guided my inquiry:

1. Why do the two teachers use simulations?

2. How do the two teachers implement simulations?

3. How do the ten students respond to simulations?

4. What do the ten students think about simulations?

To answer …

Full-Page Versus Partial-Page Screen Designs In Web-Based Training: Their Effects On Learner Satisfaction And Performance, Phillip Eulon Grace

USF Tampa Graduate Theses and Dissertations

This is a report on research regarding the screen layout of Web-based training (WBT) programs, conducted with an eye toward providing evidence-based guidance for the design and development of WBT interfaces. Specifically, the study investigated the relative instructional benefits of two general types of WBT screen design, full-page and partial-page, in terms of both learner performance and learner satisfaction. The main hypotheses of the study were that the full-page design option would yield significantly better outcomes in both categories of interest.

The study employed a mixed-method design, generating both quantitative and qualitative data. The main phase of the study was …

Asperger Syndrome: A Case Study On One Family’S Understanding, Ben Graffam

USF Tampa Graduate Theses and Dissertations

This study explored the way members of one family understand the presence of developmental delays, especially Asperger Syndrome, in the children of that family. Specifically the study sought to glean how each parent constructed individual understanding of the presence of Asperger Syndrome in their twin, 13 year-old boys. It also sought to explore how each twin experienced the phenomenon of being labeled a child with Asperger Syndrome, and how their experiences affected their growing understanding of the syndrome. A third son, 10 years old, with PDD-NOS, was also a central focus in this study in that he also created and …

Ground Penetrating Radar Response To Thin Layers: Examples From Waites Island, South Carolina, Swagata Guha

USF Tampa Graduate Theses and Dissertations

Thin layers (layers that are not resolvable in terms of GPR wavelengths) are very common in sedimentary deposits. To better understand ground penetrating radar (GPR) wave behavior in sequences of thin layers with contrasting electromagnetic parameters, 1D FDTD simulations are run for simple layer distributions. Laminated (mm-scale) sequences can produce reflected energy with 10-20% of the amplitude of reflections from equivalent isolated contacts. Amplitude spectra from laminae packages are shifted toward higher frequencies. Such spectral shifts in radar profiles may potentially be used as indicators of fine-scale laminations. A comparative study of GPR records and models generated from core data …

Reliability Of Hand Measures Of Ultrasound Analysis, Sarah A. Hardin

USF Tampa Graduate Theses and Dissertations

As ultrasound imaging gains popularity in speech research, an important question to address is the reliability of the measures taken from these images. This study examines the reliability of hand measures of ultrasound data collected by graduate student researchers in the University of South Florida’s speech science lab. Speech production data from “Ultrasound analysis of velar fronting” (Wodzinski, 2004) and “Ultrasound study of errors in speech production” (Frisch, 2003) were used to obtain inter-rater reliability measures. This study compares the rater’s choice of video frame depicting alveolar or velar closure image, anterior and posterior points of closure, tongue blade and …

Light Element And Lithium Isotope Signatures Of The Emii Reservoir - The Society Islands, French Polynesia: Geochemical Results And An Educational Application, Judy Ann Harden

USF Tampa Graduate Theses and Dissertations

The purpose of this thesis is to examine the abundance systematics of Li, Be and B, and Li isotopic systematics in lavas from the Society Islands, an enriched mantle (EMII) intraplate site, to further characterize the chemical signatures in the sources for ocean island basalts that may result from subduction-related processes and mantle entrainment. The goal is to see how light-element and Li-isotope systematics vary during ocean-island volcanic evolution and during tropical weathering.

B/K, B/Be and Li/V ratios in basaltic Moorea lavas are 0.0001-.0002, 0.6-2.0 and 0.01-0.05 respectively, and the more evolved samples are somewhat higher. These ratios are similar …

Multiculturalism, Public Policy, And The High School United States And American Literature Canon: A Content Analysis Of Textbooks Adopted In The State Of Florida In 1991 And 2003, Angela L. Hansen

USF Tampa Graduate Theses and Dissertations

This study compared the content of United States and American Literature textbooks adopted in Florida in 1991 and 2003 to determine any change in the inclusion of multiculturalism, as a response to public policy. Since Florida is a key adoption state, textbooks adopted would probably be reflective of national developments. To determine effects of public policy on literary selections appearing in high school United States and American literature textbooks, a variety of strategies was employed. Literary selections for each textbook and each adoption year were categorized by race and/or ethnicity and gender of the author, and genre of selections. In …

An Examination Of The Relationship Between Urbanicity And Children With Emotional Disturbances Served In Restructuring Public Schools, Karen Monk Harris

USF Tampa Graduate Theses and Dissertations

Efforts to affect changes in student achievement through altering the manner in which schools operate have been countless. However, there are few empirical studies on the relationship between these reform activities and student outcomes, especially outcomes for students with emotional disturbances from geographically diverse locations.

The current study was a secondary analysis of data collected as part of the School and Community Study and the Urban School and Community Study conducted by the Research and Training Center for the Childrenís Mental Health at the Louis de la Parte Florida Mental Health Institute at the University of South Florida. Both studies …

A Discourse Concerning Two New Compositions, Stanley D. Harrison

USF Tampa Graduate Theses and Dissertations

This project addresses problems for theorists of writing and composition that arose in the 1990s when capital privatizes the production of internetworked writing and starts operating in the manner of a practicing compositionist. I begin by noting that capital in the 1990s converted internetworked writing machines into fixed capital and started composing its version of the cultural form of the "social" we call the Internet. Thereafter, I argue that composition theorists can best understand the Internet, internetworked writing, and internetworked subjectivities if they regard capital as a formidable compositionist, one capable of making the machinofactured internetworked composition into a privately …

Spatial Analysis Of Pedestrian Accidents, Tomoyuki Hashimoto

USF Tampa Graduate Theses and Dissertations

Improving traffic safety for pedestrians is an urgent task for the Hillsborough County. The objective of this research is to understand the contributing factors that cause pedestrian accidents in Hillsborough County in the State of Florida. Specifically, this research attempts to determine the effects of demographic, land use, roadway and traffic volume factors on the number of pedestrian accidents. Five hypotheses were proposed to examine these factors. GIS was used to perform spatial analysis. Based on pedestrian accident records from 1999 to 2001, accident density map was created using Kernel density method. The value of the accident density was assigned …

Service-Learning Literacies: Lessons Learned From Middle School Youth, Steven Michael Hart

USF Tampa Graduate Theses and Dissertations

The dominant ideology driving the current educational reform movement positions adolescents as deficient in basic literacy skills. To address this deficiency, the trend has been to implement high-stakes standardized literacy tests and increase accountability to schools for developing basic literacy skills. Opposing this Discourse of “deficient youth,” literacy researchers have moved to adolescents’ cultural spheres of life beyond school to discover that traditional structures for teaching literacy appear to have resulted in a growing dissonance between literacies that take place within schools and those employed by youth in their personal worlds.

This research was conducted to explore how adolescents constructed …

Standardizing The Auditory Evoked Potential Technique: Ground-Truthing Against Behavioral Conditioning In The Goldfish, Carassius Auratus, Randy J. Hill

USF Tampa Graduate Theses and Dissertations

Auditory evoked potentials (AEPs) have become commonly used to measure hearing thresholds in fish. However, it is uncertain how well AEP thresholds match behavioral hearing thresholds and what effect variability in electrode placement and tank composition has on AEPs. In the first experiment, the effect of testing tank composition and electrode placement on AEPs was determined by recording AEPs in the same individual fish in a steel and PVC cylindrical testing tank, and simultaneously recording AEPs from four locations and two different depths on each of 12 goldfish, Carassius auratus. Results from these studies show that tank composition has …