American Studies Commons^™

Salinity (Conductivity) Sensor Based On Parallel Plate Capacitors, Shreyas Bhat

USF Tampa Graduate Theses and Dissertations

This work is aimed at developing a high sensitivity salinity (conductivity) sensor for marine applications. The principle of sensing involves the use of parallel plate capacitors, which minimizes the proximity effects associated with inductive measurement techniques. The barrier properties of two different materials, AZ5214 and Honeywell's ACCUFLO T3027, were investigated for use as the insulation layer for the sensor. Impedance analysis performed on the two coatings using Agilent's 4924A Precision Impedance Analyzer served to prove that ACCUFLO was a better dielectric material for this application when compared to AZ5214.
Two separate detection circuits have been proposed for the salinity sensor. …

Ensembles For Distributed Data, Larry Shoemaker

USF Tampa Graduate Theses and Dissertations

Many simulation data sets are so massive that they must be distributed among disk farms attached to different computing nodes. The data is partitioned into spatially disjoint sets that are not easily transferable among nodes due to bandwidth limitations. Conventional machine learning methods are not designed for this type of data distribution. Experts mark a training data set with different levels of saliency emphasizing speed rather than accuracy due to the size of the task. The challenge is to develop machine learning methods that learn how the expert has marked the training data so that similar test data sets can …

Development Of Laser System To Measure Pavement Rutting, Hongzhi Wang

USF Tampa Graduate Theses and Dissertations

Asphalt pavement rutting is one of the most common and destructive pavement distresses observed on U.S. roads, particularly in the urban environment at intersections. They are an important indicator of the structural integrity of the pavement as well as having an impact on road user safety. For these reasons, most road agencies regularly monitor the levels of rut depths on their pavement. There are four technologies used for estimating rut depth in automated measurement way: ultrasonics, point lasers, scanning lasers, Optical.

This thesis will focus on the development of the laser scanner rut depth measurement system, including the improvement of …

Mapping Tampa Bay Cynoscion Nebulosus Spawning Habitat Using Passive Acoustic Surveys, Sarah Lyle Walters

USF Tampa Graduate Theses and Dissertations

Spotted seatrout, Cynoscion nebulosus, spawning locations as well as associated environmental variables were determined for Tampa Bay, Florida during the 2004 spawning season using a mobile hydrophone survey. Hydrophones, a type of underwater microphone, can be used to detect and record spawning sounds of soniferous fishes. During their spawning season in Tampa Bay which generally occurs between March and September, mature male spotted seatrout generate sounds associated with courtship in the crepuscular and evening periods by vibrating sonic muscles against the swim bladder. Active spawning sites can be located using hydrophones to find these calling males.

Using a random …

Torsion-Induced Pressure Distribution Changes In Human Intervertebral Discs: An In Vitro Study, Brenda Kay Yantzer

USF Tampa Graduate Theses and Dissertations

Introduction. To test the effects of torsion torques on intradiscal pressure and disc height in human lumbar specimens.

Methods. Six human lumbar cadaveric functional spine units (FSU) were loaded in the neutral position with 600 N compression. Nucleus pressure measurements were obtained at 0 Nm, 0.5 Nm, 1.0 Nm and 2 Nm torsion torque. Posterior elements were removed and pressure measurements were repeated at the same torsion torques for the disc body unit (DBU). The pressure in the nucleus was measured by pulling a pressure probe through the disc along a straight path in the midsagittal plane.

Results …

Investigating The Hispanic/Latino Male Dropout Phenomenon: Using Logistic Regression And Survival Analysis, Dorian Charles Vizcain

USF Tampa Graduate Theses and Dissertations

This dissertation explored the factors associated with dropping out of middle school and high school among Hispanic/Latino male students. Predictor variables investigated were: age, home language, retention history, SES, program of studies, suspensions, and GPA. Data were from a large urban school district in the state of Florida. A sample of 865 Hispanic/Latino male Latino students in the 8th grade in 1995-96 was followed longitudinally every year to the year 2000-01. Survival analysis and logistic regression were used to examine the data.

The research questions were: 1) What is the relation between age, home language, retention history, SES, program of …

Nanomaterial Sensing Layer Based Surface Acoustic Wave Hydrogen Sensors, Krishnan Srinivasan

USF Tampa Graduate Theses and Dissertations

This thesis addresses the design and use of suitable nanomaterials and surface acoustic wave sensors for hydrogen detection and sensing.

Nanotechnology is aimed at design and synthesis of novel nanoscale materials. These materials could find uses in the design of optical, biomedical and electronic devices. One such example of a nanoscale biological system is a virus. Viruses have been given a lot of attention for assembly of nanoelectronic materials. The tobacco mosaic virus (TMV) used in this research represents an inexpensive and renewable biotemplate that can be easily functionalized for the synthesis of nanomaterials. Strains of this virus have been …

Creation, Analysis, And Evaluation Of Remote Sensing Sinkhole Databases For Pinellas County, Florida, Larry D. Seale Jr.

USF Tampa Graduate Theses and Dissertations

A database of likely sinkholes in Pinellas County, Florida, created using airborne laser swath mapping (ALSM a.k.a LIDAR for light detection and ranging), correlates poorly with other databases of likely sinkholes created from modern and historic aerial photographs. Urbanization appears to be the cause of the poor correlation. Buildings obscure much of the ground surface in urban areas, and many man-made depressions can be confused with natural sinkholes. Additionally, the lack of air photos contemporaneous with the ALSM data hinders ALSM analysis in rapidly developing areas.

Selecting a lightly-developed portion of the county for further study reduced the effects of …

Examining Emotional Intelligence And Leadership, Shannon Webb

USF Tampa Graduate Theses and Dissertations

Varying theories have been presented about the relationship of emotional intelligence to transformational leadership. The present study examines the extent to which a self report measure of emotional intelligence, based upon an ability model, can predict each of the four components of transformational leadership. This study further considers the extent to which the quality of a leader-follower dyad's Leader-Member Exchange relationship can moderate the relationship between emotional intelligence and transformational leadership. Study results demonstrate that emotional intelligence is related to several components of transformational leadership, and that both the quality of the Leader-Member Exchange relationship and the tenure of the …

From Chapel To Chamber: Liturgy And Devotion In Lucantonio Giunta’S Missale Romanum, 1508, Lesley T. Stone

USF Tampa Graduate Theses and Dissertations

A missal is the liturgical book containing the prayers and readings for the celebration of the Mass. Originally designed in large folio format, the simultaneous arrival of the printing press amidst a shift in the celebration of Mass from a communal to a private sphere resulted in the proliferation of the small and more portable octavo-size missal. Missals traditionally contained minimal illustrations prior to printing, resulting in their strict classification as a liturgical object. This thesis questions the previous established boundaries which categorize medieval objects as related to a particular type of religious activity. In other words, missals have been …

Application Of Residual Mapping Calibration To A Transient Groundwater Flow Model, Jeremy White

USF Tampa Graduate Theses and Dissertations

Residual mapping is an automated groundwater-model calibration technique which rapidly identifies parameter-zone configurations, while limiting tendencies to over-parameterize. Residual mapping analyzes the model residual, or the difference between model-calculated head and spatially-interpolated observation data, for non-random trends. These trends are entered in the model as parameter zones. The values of hydrologic variables in each parameter zone are then optimized, using parameter-estimation software. Statistics calculated by the parameter-estimation software are used to determine the statistical significance of the parameter zones. If the parameter-value ranges for adjacent zones do not have significant overlap, the zones are considered to be valid. This technique …

Third Grade Retention And The Florida Comprehensive Assessment Test: An Exploratory Study, Heather A. Powell

USF Tampa Graduate Theses and Dissertations

Literacy is a growing national concern, resulting in federal legislation (e.g., No Child Left Behind Act) instituting higher accountability for states and schools with regard to reading instruction and remediation. As a result, Floridas statewide measure of achievement, the Florida Comprehensive Assessment Test (FCAT) is now tied to retention decisions in third grade as part of the new pupil progression plan in the state. In its first year of implementation (2003), 23% of third-grade students failed the FCAT and over 28,000 were retained.

Research has consistently shown retention to be a negative experience for children; even when academic gains are …

Sialic Acid Modulation Of Cardiac Voltage-Gated Sodium Channel Gating Throughout The Developing Myocardium, Patrick J. Stocker

USF Tampa Graduate Theses and Dissertations

The proper orchestration of voltage-gated ion channel gating is vital to maintaining normal heart rhythms throughout an animal's lifespan. Voltage-gated sodium channels, Na_v, are responsible for the initiation of the cardiac action potential, which leads to cardiac systole. Comparison of neonatal ventricular and atrial myocyte Na_v gating with adult indicated that the neonatal ventricular Na_v gated following a ~10 mV greater depolarization than did atrial or adult ventricular Na_v. In this study I questioned whether development- and/or chamber-dependent changes in Na_v-associated functional sialic acids could account for these differences. When desialylated with …

Gender Stereotypes Of Citizenship Performance And Their Influence On Organizational Rewards, Lisa Wilkinson

USF Tampa Graduate Theses and Dissertations

Gender differences were investigated on ratings of citizenship performance (altruistic behaviors in the workplace). Self, peer, and supervisor ratings were collected on the three dimensions of citizenship performance (personal support, organizational support, and conscientious initiative) with scale type and gender as possible moderators of citizenship performance ratings.

Two hundred and twenty-four individuals performance ratings were collected, from different companies across the United States. The majority of these participants were white and female, and the largest industry sampled was the customer service industry. Participants were asked to complete a performance rating about themselves and have their peers and supervisor evaluate their …

Teaching Excellence: Perceptions Of Community College Students, Gary Robert Oesch

USF Tampa Graduate Theses and Dissertations

Numerous efforts to assess teaching excellence have been attempted, but systematic research has produced limited results at best. This study expanded upon recent studies focusing on how students' perceptions and attitudes can be used to identify the best course environments and the qualities of teaching excellence. This is especially critical considering that most previous empirical research has been conducted at the university level, while community colleges have been mostly overlooked. Thus, little is know about community college students' perceptions of teaching excellence. To assess their views of teaching excellence, a questionnaire was given to students from one community college to …

Discourse And Disconnect: Black Teachers And The Quest For National Board Certification, Paula J. Leftwich

USF Tampa Graduate Theses and Dissertations

Discourse and Disconnect: Black Teachers and the Quest for National Board Certification Paula J. Leftwich ABSTRACT Black teachers have been under-represented proportionate to their presence in the teaching population in both the application for and achievement of certification by the National Board for Professional Teaching Standards. This study sought to explore the possibility of a disconnect between the discourses of Black teachers and the discourses of the National Board Certification process. Further, it was designed to investigate the effectiveness of targeted mentoring strategies to increase the participation rate and achievement rate of Black teachers in this complex and lengthy process. …

The Early Ontogeny Of Feeding In Two Shark Species: Developmental Aspects Of Morphology, Behavior, And Performance, David C. Lowry

USF Tampa Graduate Theses and Dissertations

Early ontogeny is a time of rapid anatomical and behavioral development in most organisms. The degree of synchrony between form and function during this period, and the concomitant performance consequences, can strongly impact individual survival. Understanding the development of feeding during early ontogeny is important because nutrient acquisition universally influences organismal biology. A one-year, longitudinal feeding study was conducted for two elasmobranch species that were selected for their disparate morphology, behavior, and habitat: the whitespotted bambooshark Chiloscyllium plagiosum and the leopard shark Triakis semifasciata. To quantify changes in cranial morphology, external attributes of the feeding apparatus were measured weekly. …

An Empirical Examination Of Job Stress And Management Of Emotionally-Based Behavior: Frontline Social Service Personnel Perspective, Doreen Sams

USF Tampa Graduate Theses and Dissertations

Frontline service personnel (FSP) play an invaluable role in the marketing mix by directly influencing the customers perception of both the service organization as well as the service quality during the face-to-face delivery service encounter (Ashforth and Humphrey 1993). The purpose of this dissertation is to examine how sources of job stress for FSP such as perceived customer demands, role ambiguity, role conflict, role overload, and emotional labor and various mediators such as job autonomy, emotional intelligence, and emotion-focused coping directly and indirectly influence job stress and outcome variables such as attitudes, behaviors, physical consequences, emotional exhaustion, job performance, and …

Effects Of Long-Term Administration Of Caffeine In A Mouse Model For Alzheimer’S Disease, William Schleif

USF Tampa Graduate Theses and Dissertations

A recent epidemiological study suggested that higher caffeine intake reduces the risk of Alzheimer's disease (AD). Caffeine, a widely consumed stimulatory drug, is a non-selective adenosine receptor antagonist that has been shown to increase plasma adenosine levels in rodents. To determine any long-term protective effects of caffeine in a controlled longitudinal study, caffeine was added to the drinking water of APP_sw transgenic (Tg) mice between 4 and 9 1/2 months of age, with behavioral testing done during the last 6 weeks of treatment. The average daily intake of caffeine per mouse (1.5 mg) was the human equivalent of 5 …

Does Agreeableness Help A Team Perform A Problem Solving Task?, Frederick R. B Stilson

USF Tampa Graduate Theses and Dissertations

The relationship between mean team Agreeableness and team performance has not been shown definitively. The present study was performed looking at archival data from a study that assessed team performance from 62 two person teams using the DDD and involving two types of training and two types of information probes during the computer task. In addition, each of the participants took a personality test based on the IPIP with an emphasis on Agreeableness and its 6 facets. Using HLM analysis, it was determined that Agreeableness does not have a significant effect on team performance for a problem solving tasks (delta …

Molecular Subtyping And Antibiotic Resistance Analysis Of Salmonella Species, Aparna Tatavarthy

USF Tampa Graduate Theses and Dissertations

The genus Salmonella, comprised of 2400 serotypes, is one of the leading causes of foodborne illnesses in the US and has been used for the deliberate contamination of food. A rapid system for detection, isolation, typing and antibiotic susceptibility profiling is essential for diagnosis and source tracking in natural outbreaks or a bioterrorism event. Pure culture is essential for molecular typing and antibiotic resistance testing. The virulence and the resistance mechanisms of Salmonella are rapidly evolving and many are still unexplained. The first aim of the study was to rapidly detect and isolate Salmonella from intentionally contaminated food. The …

An Exploration Of The Lumbar Loads And Affective Responses To Lumbar Pain On Lower Limb Amputees Who Use A Prosthesis, Tracy Ann Perrotti

USF Tampa Graduate Theses and Dissertations

80% of the American population experiences back pain and it is the most common cause of limited activity in people of age 45 and under. Determining the reasons for back pain and developing new ways to treat it have been extensively researched over the past decade. However, very little research has been done on low back pain of amputees.

There are four million existing amputees living in America and 250,000 people become new amputees each year. 70% of this group is lower limb amputees and a large number use a prosthesis of some kind to aid in the functions of …

Automatic Attention To Aggression Cues And Alcohol Cues Using A Dichotic Listening Task And A Parafoveal Visual Task, Michelle Edington Levasseur

USF Tampa Graduate Theses and Dissertations

Ongoing investigations of drunken aggression tend to focus on 1) situational cues, and 2) individual variables such as personality traits. This study investigated the hypothesis that an undergraduates attention would be pulled toward a nonconscious presentation of aggression stimuli, especially in the presence of alcohol cues, and especially if he or she was high on trait anger [as measured using the State Trait Anger Expression Inventory (STAXI); Spielberger, 1988] and had high expectancies for behaving aggressively while drinking alcohol [as measured using the Expectancy Questionnaire for Alcohol and Aggression Lo Dose (EQAAL); Epps, Hunter, LeVasseur, Steinberg, and Hancock, unpublished manuscript]. …

The Relationship Between Teaching Experience And Style And Primary Student Gains In Mathematics Using An Integrated Learning System, Marilyn N. Meub

USF Tampa Graduate Theses and Dissertations

The purpose of this mixed methods study was to ascertain using multiple tools and methods, the impact of teachers' interaction with primary students on mathematics performance using the Successmaker Integrated Learning System to determine effective teacher practices. The sample of nineteen primary teachers from an elementary school in southwest Florida included five first grade teachers, seven second grade teachers, and seven third grade teachers.

Data analysis included total years of teaching experience, years of experience in Florida schools, and years of experience at each grade. Both the total years of teaching and the years of teaching at the research site …

Microfinance In Neoliberal Times: The Experience Of An Egyptian Ngo, Sarah A. Tobin

USF Tampa Graduate Theses and Dissertations

Development non-governmental organizations (NGOs) are under immense pressure to adhere to the programs and methods put forth by external donors, particularly if the NGOs rely on the funding to sustain their own organizations. Those external donors that represent neoliberal ideologies and enforce neoliberal practices, particularly in the area of microfinance, maintain a power that most recipient NGOs cannot evade. This becomes a difficult position for the NGOs to navigate as they try to accomplish good work in their communities. This research project is a study into the experience of one NGO, the Egyptian Development Organization (EDO), as it implemented microfinance …

Sexual Functioning In Breast Cancer Survivors, Heidi M. King

USF Tampa Graduate Theses and Dissertations

Breast cancer diagnosis and treatment has been suggested to effect sexual functioning. Little is known about how breast cancer patients compare to women without a history of cancer on measures of sexual functioning, as well as the psychological and physical factors may contribute to these difficulties. To address these issues, 71 breast cancer patients and 40 of their nominated friends were recruited and served as participants. All women received and returned via the mail measures on general background information, depression, fatigue, marital satisfaction, body image, vaginal symptoms, and sexual functioning. All the psychological and physical variables assessed correlated with a …

Monte Carlo Simulations As A Tool To Optimize Target Detection By Auv/Rov Laser Line Scanners, Martin Alejandro Montes

USF Tampa Graduate Theses and Dissertations

The widespread use of laser line scanners (LLS) aboard unmanned underwater vehicles in the last decade has opened a unique window to a series of ecological and military applications. Variability of underwater light fields and complexity of light contributions reaching the receiver pose a challenge for target detection of LLS under different environmental conditions. The interference of photons not originating at the target (e.g. water path, bottom) can often be minimized (e.g., time-gated systems) but not excluded. Radiative transfer models were developed to better discriminate noise components from signal contributions at the receiver for two continuous LLS: Real-time Ocean Bottom …

Stress And Cognitive Performance In Older Adults, Christopher B. Rosnick

USF Tampa Graduate Theses and Dissertations

The current dissertation sought to examine stress in three different, but overlapping, ways. The first study examined how self-reported negative life events, in the aggregate and individually, are associated with cognitive performance. The results suggested that there was no significant relationship between the aggregate measures of self-reported negative life events and cognitive performance. On the other hand, several individual negative life events were associated with cognitive functioning. The findings support previous research indicating that using estimates of individual stressors rather than aggregate measures of stressors increases the predictive validity of stress measurement.

The second study assessed the cross-sectional and longitudinal …

Zooplankton Of The West Florida Shelf: Relationships With Karenia Brevis Blooms, Kristen M. Lester

USF Tampa Graduate Theses and Dissertations

Blooms of the toxic dinoflagellate Karenia brevis are common on the West Florida Shelf (WFS), yet little is known of the relationships between zooplankton and K. brevis. A comprehensive analysis was undertaken to examine 1) perturbations in zooplankton community composition within K. brevis blooms 2) the contribution of zooplankton ammonium and phosphate excretion to K. brevis bloom nutrient requirements, and 3) the role of zooplankton grazing in K. brevis bloom termination. Prior to undertaking the first portion of the study, an examination of the perturbations in the normal zooplankton assemblage within K. brevis blooms, it was first necessary to …

A Vascular Plant Inventory And Description Of The Twelve Plant Community Types Found In The University Of South Florida Ecological Research Area, Hillsborough County, Florida, Anne Candace Schmidt

USF Tampa Graduate Theses and Dissertations

The University of South Florida Ecological Research Area (USF Eco Area), located in west central Hillsborough County, is an approximately 306 hectare (756 acre) natural area on the Hillsborough River composed of twelve plant communities. While surrounded on three sides by urbanization, the USF Eco Area makes up the western most section of an extended natural corridor that runs approximately 88 kilometers (55 miles) east and north along the Hillsborough River. An inventory of the vascular flora and the associated ecological communities was developed to better assess the USF Eco Area for educational and research purposes as well as enhance …