Digital Commons Network^™

Ultra-Low Power Electronics For Autonomous Micro-Sensor Applications, Rebeka Davidova

USF Tampa Graduate Theses and Dissertations

This thesis presented the research, design and fabrication associated with a unique application of rectenna technology combined with lock-in amplification. An extremely low-power harmonic transponder is conjoined with an interrogator base-station, and utilizing coherent demodulation the Remote Lock-In Amplifier (RLIA) concept is realized. Utilizing harmonic re-radiation with very low-power input, the 1^st generation transponder detects a transmitted interrogation signal and responds by retransmitting the second harmonic of the signal. The 1^st generation transponder performs this task while using no additional power besides that which accompanies the wireless signal. Demonstration of the first complete configuration provided proof of concept …

Evaluating The Effectiveness Of A Teaching Package Utilizing Behavioral Skills Training And In Situ Training To Teach Gun Safety Skills In A Preschool Classroom, Laura Ann Hanratty

USF Tampa Graduate Theses and Dissertations

There are a number of different safety threats that children face in their lives. One infrequent, but highly dangerous situation a child can face is finding a firearm. Hundreds of children are injured or killed by firearms each year. Fortunately, behavioral skills training (BST) and in situ training (IST) are effective approaches for teaching a number of different skills, including safety skills. The purpose of this study was to evaluate a teaching package for preschool teachers to learn to conduct BST to teach safety skills. A multiple baseline across subjects design was used to evaluate the effectiveness of this teaching …

The Role Of Lipoproteins/Cholesterol In Genomic Instability And Chromosome Mis-Segregation In Alzheimer's And Cardiovascular Disease, Antoneta Granic

USF Tampa Graduate Theses and Dissertations

Several lines of evidence link Alzheimer's disease (AD) to atherosclerosis (CVD), including that elevated low density lipoprotein (LDL)-cholesterol is a common risk factor. Development of genomic instability could also link the two diseases. Previous fluorescence in situ hybridization (FISH) analyses revealed a clonal expansion of aneuploid smooth muscle cells underlying atherosclerotic plaques. Likewise, cellular and mouse models of AD revealed tau-dependent mitotic defects and subsequent aneuploidy partly resulting from amyloid-beta (A&beta) interference with microtubule (MT) stability, and specific MT motors function. Moreover, AD patients develop aneuploid/hyperploid cells in brain and peripheral tissues, implicating similar mechanism that may lead to apoptosis …

Developmental Trajectories Of Self-Control: Assessing The Stability Hypothesis, James Vance Ray

USF Tampa Graduate Theses and Dissertations

A key proposition of Gottfredson and Hirschi's (1990) self-control theory is the stability hypothesis which suggests that an individual's level of self-control, once established between the ages of 8-10, is stable over the life course. Empirical results from examinations of the stability hypothesis have been mixed. Prior tests of the stability hypothesis have employed aggregate assessment methods (e.g., mean-level and correlational analyses). Such approaches fail to take into account the possibility that individual developmental pathways may differ. This study employs individual longitudinal data over a four year period for 3,249 7^th to 10^th grade subjects to assess the …

Smart Grid Functionality Of A Pv-Energy Storage System, Nenad Damnjanovic

USF Tampa Graduate Theses and Dissertations

Renewable Energy will be the key to preserving the Earth's remaining resources and continuing this surge of technological progress that we have experienced this past century. New philosophies of how/when/where energy should be consumed and produced are attempting to improve upon the current grid infrastructure. The massive advancement in communications, renewable and control systems will allow this new-age electric grid to maximize its efficiency while reducing cost. Renewable, "green" energy is now at the forefront of innovation. As the world population increases, there will be a need to free ourselves from natural resources as much as possible. Advanced Energy Storage …

Physical Activity Promotion Among School-Aged Children Using Pedometers And Rewards, Kari E. Ek

USF Tampa Graduate Theses and Dissertations

Physical activity is important for children as many children are considered overweight or obese. The benefits of exercise have been demonstrated in empirical studies across all age ranges (Horne, Hardman, Lowe, & Rowlands, 2009; Kelly et al., 2004; Louie & Chan, 2003; Southard & Southard, 2006). In the current study, a multiple baseline design across participants was used to assess the effectiveness of goal setting, reinforcement contingencies, and pedometers that provide feedback to increase step count of 5 participants. During baseline each participant wore a sealed pedometer to assess the average steps the participants took per day. After baseline, each …

The Role Of Acculturation In Adolescent Mental Health And Academic Achievement: Mediational Pathways, Ariz Rojas

USF Tampa Graduate Theses and Dissertations

This study investigated the different pathways by which acculturation may influence Hispanic adolescents' psychological functioning and academic achievement. Proposed mediational pathways included adolescent perceptions of mothers' and fathers' parenting practices, acculturative stress, self-esteem, academic support, and academic motivation. Participants included 116 9^th and 10^th grade students recruited from high schools and a parent for each student. Parents completed a measure of acculturation and rated their adolescents' psychological symptomology. Adolescents completed measures of perceived parenting (mother and father), a self-report of psychological symptoms, a measure of acculturation and acculturative stress, as well as ratings of academic support and motivation. …

Effects Of Solids Loadings And Particle Size Distribution On Siphon Ceramic Candle Filters, Danielle Renzi

USF Tampa Graduate Theses and Dissertations

In the rural areas of Madagascar only 29% of the population has access to clean water and 10% has access to improved sanitation. It has been estimated that environmental risk factors, such as inadequate access to clean drinking water and proper sanitation, are responsible for 94% of the diarrheal disease burden. This study was focused on testing a point-of-use technology called the Tulip filter, which is a siphon ceramic candle filter impregnated with silver. The purpose is to assess its feasibility for implementation in rural regions of Madagascar through a laboratory study performed at the University of South Florida.

The …

Decision Aid Models For Resource Sharing Strategies During Global Influenza Pandemics, Alfredo Santana Reynoso

USF Tampa Graduate Theses and Dissertations

Pandemic influenza outbreaks have historically entailed significant societal and economic disruptions. Today, our quality of life is threatened by our inadequate preparedness for the imminent pandemic. The key challenges we are facing stem from a significant uncertainty in virus epidemiology, limited response resources, inadequate international collaboration, and the lack of appropriate science-based decision support tools. The existing literature falls short of comprehensive models for global pandemic spread and mitigation which incorporate the heterogeneity of the world regions and realistic travel networks. In addition, there exist virtually no studies which quantify the impact of resource sharing strategies among multiple countries. This …

It Takes More Than A Whistle: Perceived Characteristics Of Effective School Based Coaches, Jenna Nicole Sage

USF Tampa Graduate Theses and Dissertations

School districts across the United States are moving toward tiered models of service delivery such as Positive Behavior Support (PBS) and Response to Intervention (RtI). A common practice in providing support for those initiatives is to develop leadership teams who are facilitated by an education-based coach. With a recent surge in hiring and transitioning of education-based coaches who support PBS and RtI it is increasingly important to understand the perceived characteristics of those coaches who are most effective at providing the social and academic outcomes associated with tiered models of service delivery. This dissertation will use a case study methodology …

Increasing Adolescents' Subjective Well-Being: Effects Of A Positive Psychology Intervention In Comparison To The Effects Of Therapeutic Alliance, Youth Factors, And Expectancy For Change, Jessica A. Savage

USF Tampa Graduate Theses and Dissertations

This study investigated the variance in subjective well-being (SWB) of early adolescents (n = 54) exposed to a positive psychology intervention aimed at increasing positive affect and life satisfaction as well as decreasing negative affect through intentional activities (e.g., gratitude journals, acts of kindness, use of character strengths, optimistic thinking). Understanding how to increase SWB among youth is important because of its associations with positive indicators of psychological and academic functioning. However, prior research is limited regarding interventions targeting SWB in youth and excludes the relation of common factors of therapeutic change. Based on the literature regarding therapeutic change, youth …

Disciplinary Outcomes By Race And Gender In Schools Implementing Positive Behavior Support: Does Fidelity Of Implementation Reduce Disproportionality?, Therese Sandomierski

USF Tampa Graduate Theses and Dissertations

Disparities in behavioral outcomes for minority students are a decades-old problem. Recently, the systems-level approach of school-wide positive behavior support (SW-PBS) and its growing research base have garnered attention as a possible remedy. Although SW-PBS has been shown to be effective in reducing a school's overall level of office discipline referrals (ODRs) and suspensions (OSS), and its success has been replicated in schools with large populations of minority students, effective outcomes across all groups of students within a school are not guaranteed. Some reports document increases in the magnitude of disproportionality even when ODRs and OSS decrease for the school …

Parent Involvement In Children's Schooling: An Investigation Of Measurement Equivalence Across Ethnic Groups, Heather Marie Scott

USF Tampa Graduate Theses and Dissertations

Epstein et al.'s Theory of Overlapping Spheres of Influence focuses on the interaction and communication, or partnerships, among families, schools, and the community to bring the three closer together. The theory works in conjunction with Epstein's typology of parental involvement, which focuses on six types of involvement that are instrumental to a child's development and his/her school and educational success. These serve as the framework for the study and support the construct of parent's involvement in children's schooling.

The purpose of the current study was to conduct further validation analyses of an inventory designed to measure the construct of parent …

The Impact Of Paternalism And Organizational Collectivism In Multinational And Family-Owned Firms In Turkey, Jennifer Schroeder

USF Tampa Graduate Theses and Dissertations

This correlational study examined the influences of paternalistic leadership behavior (PL) and organizational collectivism (measured at the employee level) on employee reported LMX, job satisfaction and organizational citizenship behaviors (OCBs) in two types of organizations (family-owned firms and multinational organizations) in Turkey. Survey data were collected from (N = 154) employees in family-owned and (N = 159) employees in multinational firms (MNCs). Employees in family-owned firms reported significantly higher levels of PL, organizational collectivism, LMX, and OCBs. Further examination revealed additional differences by organization type, with the family-owned sample showing no significant relationships between study variables and OCBs, in contrast …

Analyses Of Language And Culture Beliefs And Reported Practices Of Pre-Kindergarten And Kindergarten Teachers Working With Dual Language Learners, Giselle Sanchez

USF Tampa Graduate Theses and Dissertations

This study explored the underlying factors involved in the Language and Culture Questionnaire (LCQ), a measure of lead pre-kindergarten and kindergarten teachers' (n = 119) beliefs and best practices for working with dual language learners (DLLs). The LCQ was found to have suboptimal reliability and all results herein should be interpreted with caution. The exploratory factor analyses suggested the LCQ weakly captures two factors, beliefs and practices. Frequencies of teachers holding the appropriate beliefs and implementing best practices were reviewed. The beliefs and practices scores exhibited a degree of relationship between each other. Finally, multiple regression designs were utilized …

A Multi-Methodological Study Of A Possible Syndemic Among Female Adult Flim Actresses, Candace Danielle Sibley

USF Tampa Graduate Theses and Dissertations

Existing literature provides support for a possible syndemic among adult film actresses. Multiple studies emphasize that a combination of economic, social, and cultural issues work together in tandem to synergistically amplify HIV/STI risk in this vulnerable population. It is critical to acknowledge how the detrimental effects of the high prevalence of substance abuse, psychological distress, intimate partner violence, and childhood sexual abuse work together in a system to heighten HIV/STI risk among adult-film actresses. Additionally, issues including the retrogressive dynamic and unequal power and hegemony in the industry function as facilitators which lower the overall health profile of adult-film actresses. …

The Relationship Of Mid-Pregnancy Levels Of Cytokines, Stress, And Depression With Gestational Age At Delivery, Melissa Molinari Shelton

USF Tampa Graduate Theses and Dissertations

Pregnancy is a time of alternating states of inflammation. The establishment of pregnancy is marked by controlled inflammation and transition toward an anti-inflammatory state for much of the gestational period before returning to an inflammatory state at the onset of labor. Stress and depression trigger the HPA Axis to produce cortisol and levels are maintained in a state of elevation during pregnancy and continue to rise before parturition.

The aim of this research was to explore the relationship of gestational age at delivery with mid-pregnancy levels of cytokines, stress and depression. Participant samples (N = 122) were collected between 16 …

Using Stratified Item Selection To Reduce The Number Of Items Rated In Standard Setting, Tiffany Nicole Smith

USF Tampa Graduate Theses and Dissertations

The primary purpose of this study was to evaluate the effectiveness of stratified item sampling in order to reduce the number of items needed in Modified Angoff standard setting studies. Representative subsets of items were extracted from a total of 30 full-length tests based upon content weights, item difficulty, and item discrimination. Cut scores obtained from various size subsets of each test were compared to the full-length test cut score as a measure of generalizability. Applied sampling results indicated that 50% of the full-length test is sufficient to obtain cut scores within one standard error of estimate (SEE) of the …

Health-Promoting Behaviors And Subjective Well-Being Among Early Adolescents, Emily J. Shaffer-Hudkins

USF Tampa Graduate Theses and Dissertations

This study investigated the specific health-promoting behaviors employed by early adolescents (n = 246) and their subjective well-being (SWB) to provide an understanding of how mental and physical wellness relate in teens. Participants self-reported on their dietary habits, physical activity, sleep hygiene, safety habits, and attitudes toward substance use. A comprehensive assessment of SWB was also gathered (i.e., global life satisfaction, positive affect, and negative affect). The researcher hypothesized that each of the five health-promoting behaviors assessed in the current study would have significant, positive correlations with the SWB of early adolescents, in that youth who reported higher levels of …

The Hippocratic Corpus And Soranus Of Ephesus: Discovering Men's Minds Through Women's Bodies, Megan Michelle Slaughter

USF Tampa Graduate Theses and Dissertations

This thesis addresses what cultural influences and social circumstances shaped the works of the Hippocratic Corpus and Soranus's Gynecology. This thesis will illustrate how these medical texts are representative of how women were viewed by men in Classical Greece and Early Imperial Rome, respectively. It deals additionally with how these gynecological works in turn impacted the way in which society viewed and treated women. In particular, these medical writers' changing views of the act of conception shed light on the differing attitudes of their cultures. Thus far research on these time periods and works has focused too narrowly on one …

Tarnished Golden Years: Older Offenders With Mental Health Problems And Late Life First Time Offenders, Brianne Stanback

USF Tampa Graduate Theses and Dissertations

Older offenders (offenders 50 years and older) are a distinct groups within the U.S. correctional system. Studies 1 and 2 were intended to investigate mental health and stressors among jailed older offenders.

Study 1 examined the prevalence rates of mental health disorders and explored the relationship between mental health disorders and stressors. Participants 50 years and older (N=330) from the 2002 wave of the Survey of Inmates in Local Jails (SILJ) were studied via descriptive analysis, factor analysis, and a logistic regression to determine which variables were related to the probability of having a mental health problem. 65.8% of participants …

Modeling And Parameter Study Of Bistable Spherical Compliant Mechanisms, Chester Smith

USF Tampa Graduate Theses and Dissertations

The bistable spherical compliant mechanism (BSCM) is a novel device capable of large, repeatable, out-of-plane motion, characteristics that are somewhat difficult to achieve with surface micromachined microelectromechanical systems. An improved pseudo-rigid-body model (PRBM) to predict the behavior of the BSCM is presented. The new model was used to analyze seven different versions of the device, each with a different compliant joint length. The new model, which adds torsion, is compared with a finite element analysis (FEA) beam model. The new model more closely approximates the results yielded by FEA than previous models used to analyze the BSCM. Future work is …

Evolution/Creationism Controversy: Analysis Of Past And Current Policies In Public Schools And The Practice Of Allowing Students To Opt-Out Of Learning Evolution Concepts, Jacquelyn Hoffmann Speake

USF Tampa Graduate Theses and Dissertations

Recent anti-evolution legislation, in the form of Academic Freedom bills, has been introduced in many state legislatures over the last three years. The language in the proposed Academic Freedom bills may allow different interpretations of what can be taught in the science classrooms, and possibly spur parents to take advantage of their perceived parental rights to request their child be opted-out of class when the scientific theory of evolution is taught. Five research questions guided the analysis of participant responses to questions and perception statements focusing on secondary school administrators' actions, perceptions, and awareness as they relate to their decision …

Perspective Shifting In Relative Clauses By Elementary-Aged Spanish-English Bilinguals: A Cross-Linguistic Study, Xigrid Tayri Soto

USF Tampa Graduate Theses and Dissertations

Language-specific theories of sentence processing suggest that individuals interpret sentences based on the characteristics of their native language (e.g., Bates & MacWhinney, 1989). As such, competing linguistic cues are taken into account (including word order, morphology, and animacy) and the cue selected is most likely to yield a correct interpretation in the native language. However, research in this area has produced conflicting results. MacWhinney (2005) has proposed that examining the role of perspective shifting in sentence comprehension may demonstrate how cognitive and syntactic factors work together to facilitate sentence comprehension. The aim of the current study is to investigate the …

Food Deserts' And 'Food Swamps' In Hillsborough County, Florida: Unequal Access To Supermarkets And Fast-Food Restaurants, Dana Beth Stein

USF Tampa Graduate Theses and Dissertations

Research has shown that the suburbanization of supermarkets has created `food deserts', defined as areas where socially disadvantaged individuals lack access to nutritious food outlets. Additionally, the growing presence of fast-food restaurants has created `food swamps', or areas where socially disadvantaged individuals encounter an overabundance of unhealthy food outlets. While previous studies have analyzed either `food deserts' or `food swamps' using conventional statistical techniques, a more comprehensive approach that includes samples of both healthy and unhealthy entities and considers the variety of available food options is necessary to improve our understanding of the local food environment and related disparities.

This …

Pilot Assessment Of Novel Membrane Bioreactor Processes - Improvements In Biological Nutrient Removal And Membrane Operation, Shaleena Smith

USF Tampa Graduate Theses and Dissertations

With increasing water reuse applications and upcoming stringent regulations for treated wastewater effluent discharge, wastewater plants need to consider alternative technologies beyond conventional treatment processes. The new regulations, Numeric Nutrient Criteria (NNC), may regulate discharge nitrogen and phosphorus concentrations to as low as 0.5 mg/L as N and 10 μg/L as P respectively. To meet these target requirements, system retrofitting to incorporate chemical or advanced nutrient removal systems possibly with membrane technology will most likely be required. Although microfiltration/ultrafiltration membranes coupled with biological processes, otherwise known as membrane bioreactors (MBR), remove contaminants and suspended solids, nutrient removal is minimal to …

Predictors Of Body Dissatisfaction, Eating Disturbance, And Depressive Symptoms In Mothers, Steffanie Sperry

USF Tampa Graduate Theses and Dissertations

Body image, eating disturbance, and depressive symptomatology have been examined extensively in the general population. The assessment of these variables within the postpartum period has also been a target of recent research. Unfortunately, no existing studies have examined the intercorrelations among these factors in mothers of young children, despite increasing media pressure for moms to maintain a slim, pre-pregnancy body. The current study examined predictors of body dissatisfaction, eating disturbance, and depressive symptoms in mothers of children aged 0-5. Simple correlations were followed by a series of linear multiple regressions incorporating sociocultural predictors alongside covariates identified in the extant literature. …

National Identity, Gender, And Genre: The Multiple Marginalization Of Lotte Reiniger And The Adventures Of Prince Achmed (1926), K. Vivian Taylor

USF Tampa Graduate Theses and Dissertations

Contemporary American visual culture is saturated with animation, from websites and advertisements to adult and children's television programs. Animated films have dominated the American box office since Toy Story (1995) and show no signs of relenting, as demonstrated by Up (2009) and Alice in Wonderland (2010). Scholarly interest in animation has paralleled the steady rise of the popularity of the medium. Publications addressing animation have migrated from niche journals, such as such as Animation Journal and Wide Angle, to one of the most mainstream English-language publications, the Modern Language Association's Profession, which included Judith Halberstam's article "Animation" in …

Growing Up With Hiv: Disease Management Among Perinatally Infected Adolescents, Barbara J. Szelag

USF Tampa Graduate Theses and Dissertations

Children born with HIV in the 1980s and 1990s are surviving into adolescence and adulthood, due to the availability of highly active antiretroviral therapy (HAART). Growing up with a chronic and stigmatized disease presents considerable challenges as young people explore their sexuality, develop relationships, and take steps to become independent and productive adults. Adherence to HAART is an essential and life-long practice for the maintenance of health and longevity. For adolescents born with HIV, a daily medication schedule is one aspect of disease management that also includes medical visits, HIV status acceptance, bouts of illness, and disclosure of HIV status …

Foraminiferal Assemblages On Sediment And Reef Rubble At Conch Reef, Florida Usa, Christy Michelle Stephenson

USF Tampa Graduate Theses and Dissertations

Benthic foraminiferal assemblages are widely used to interpret responses of the benthic communities to environmental stresses. This study compares epibiotic foraminiferal assemblages, collected from reef rubble, with those from reef sediments. The study site, Conch Reef, is the site of the Aquarius Underwater Habitat research facility and includes protected areas used only for scientific studies. Although a number of studies have enumerated foraminiferal taxa from the Florida reef tract, no projects have focused on the assemblages that occur at Conch Reef.

Sediment and reef rubbles samples were collected via SCUBA from a depth range of 13 to 26 m during …