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Evaluation Of The Long-Term Effect Of Inorganic Leachate On Geosynthetic Clay Liners, Darwish El-Hajji

USF Tampa Graduate Theses and Dissertations

Because of its low permeability and high swelling characteristics, bentonite is used in various hydraulic barrier systems and in the manufacturing of Geosynthetic Clay Liners (GCLs). Exposure to inorganic solutions containing elevated concentrations of electrolyte can significantly increase their permeability. To enhance the bentonite's chemical resistance to inorganic solutions, the manufacturers of GCL materials introduced propriety soluble polymeric compounds as an additive to bentonite. The resulting materials are referred to as polymer-treated, chemically-enhanced, or contaminant-resistant clays, and are arguably resistant to a host of inorganic chemicals. In this study, the response of both regular and polymer treated bentonite clays to …

Storm-Influenced Sediment Transport Gradients On A Nourished Beach, Nicole A. Elko

USF Tampa Graduate Theses and Dissertations

Beach nourishment provides an excellent opportunity for the study of intensified sediment transport gradients and associated morphological changes in a natural setting. The objectives of this study are to quantify and predict longshore and cross-shore transport gradients induced by 1) beach nourishment, 2) different storm wave conditions, and 3) the annual wave climate and long-term sediment supply. The details of sediment transport rates and gradients induced by gradual processes and high-energy events are analyzed on a macro-scale. Well-planned monitoring of the 2004 Upham Beach nourishment project in west-central Florida collected high-spatial and -temporal resolution field data. Three hurricanes passed by …

An Examination Of The Relationship Between The Presence Of Critical Components Of Classroom Positive Behavior Support And Student Behavior, Gregory S. Ern

USF Tampa Graduate Theses and Dissertations

This purpose of this study was to assess the relationship between the presence of classroom components of positive behavior support and student behavior outcomes. Data were collected using the Tool for Assessing Classroom Level-Positive Behavior Support (TACL-PBS) developed by Ern (2004) to assess the presence or absence of critical components of positive behavior support at the classroom level. Descriptive data on the instrument including the internal consistency, interrater agreement, and concurrent validity were analyzed and are included in this report. Forty classrooms from ten diverse elementary schools in three school districts were selected to participate in this study. Office discipline …

Investigation Into The Hydrogen Gas Sensing Mechanism Of 3c-Sic Resistive Gas Sensors, Timothy J. Fawcett

USF Tampa Graduate Theses and Dissertations

The hydrogen (H2) gas sensing mechanism driving 3C-SiC resistive gas sensors is investigated in this work in which two hypotheses are proposed. One hypothesis involves the surface adsorption of H2 on the sensor surface with the adsorbed molecules influencing the flow of current in a resistive gas sensor, termed the surface adsorption detection mechanism. The second hypothesis includes the transfer of heat from the sensor to the gas, producing a change in the temperature of the device when the heat transfer characteristics of the gas change, termed the thermal detection mechanism. The heat transfer characteristics of the gas are dependent …

Asymptotes And Metaphors: Teaching Feminist Theory, Michael Eugene Gipson

USF Tampa Graduate Theses and Dissertations

As we move through our daily lives, the cogency of the world shifts and changes. Many constructs exist to explain and account for how we view and interact with our environment. Education is where our understandings become formalized and are challenged. To this end, a plethora of pedagogical tools are made available to aid educators in illuminating the world(s) around and within each student. However, there is always room for new ways of presenting information, concepts, and ideas. I put forth the mathematical trope of asymptotes as a new pedagogical tool. Asymptotes, as metaphor, work as a pedagogical tool for …

Linking Pretreatment Therapist Characteristics To The Therapeutic Alliance In Youth Treatment: An Examination Of Professional Burnout, Counseling Self-Efficacy And Gender Role Orientation, Jessica B. Handelsman

USF Tampa Graduate Theses and Dissertations

The present study investigated three pretreatment therapist characteristics (professional burnout, counseling self-efficacy, and gender role orientation) in relation to the therapeutic alliance within the context of youth treatment. It was hypothesized that the emotional exhaustion and depersonalization dimensions of burnout would be negatively associated with the alliance, while the personal accomplishment dimension of burnout and counseling self-efficacy would be positively associated with the alliance. In addition, it was hypothesized that androgynous therapists would have superior alliances, relative to stereotypically masculine or feminine therapists. Participants were 42 pairs of therapists and youth clients. Prior to intake, therapists completed the Maslach Burnout …

Mentor And Mentee Perceptions Of The Importance And Effectiveness Of Mentor Support, Cenira Holcomb

USF Tampa Graduate Theses and Dissertations

This mixed-methods action research study explored the congruence between mentor and mentee perceptions of the importance and effectiveness of 12 district-specific focus areas of mentor support. While reviewing current data pertaining to teacher attrition, the researcher observed a limited availability of investigations relating to the perceived role of the mentor teacher based on the experiences and observations of both the novice and mentor teacher.The target population for this study was 70 novice and mentor special education teachers during the 2005--2006 school year employed at 13 middle schools in a school district located in Florida. Of the 70 beginning and mentor …

West Tampa: Economic Development And Community Engagement Within An Urban Neighborhood, Jenna Holzberg

USF Tampa Graduate Theses and Dissertations

This thesis is a critical evaluation of the methods of community engagement used by the Hillsborough County City-County Planning Commission during the creation and implementation of the West Tampa Economic Development Plan. Data for this research was conducted in West Tampa, a neighborhood in Tampa, Florida. In the spring of 2005, the Planning Commission began working with the residents, business and property owners in West Tampa to develop the neighborhood's economic development plan. Using the community engagement methods of surveys, mailed and posted community announcements, community meetings, focus groups and interviews, the Planning Commission created an economic development plan which …

The Relationship Between Nurses' Anxiety And Attitude Related To Pediatric Hospice, Teresa Lyn Hoover

USF Tampa Graduate Theses and Dissertations

To lose a child is a profoundly emotional experience. Even if it is not your own, the experience involves deeply held beliefs about death, the quality of death, ethics, and perhaps personal experience. Left unexplored, these beliefs and the anxiety they may produce, can become barriers to providing quality end-of-life care for children with life limiting conditions and their families. The purpose of this study was to explore the relationship between hospice nurses' attitudes toward providing pediatric hospice care and the level of anxiety they may experience related to pediatric hospice care. A self administered questionnaire was completed by 30 …

Effects Of Trait Anxiety And Cognitive Appraisals On Emotional Reactions To Psychological And Physical Stressors, Qutayba Abdullatif

USF Tampa Graduate Theses and Dissertations

This study investigated the effects of individual differences in trait anxiety on cognitive appraisals and emotional reactions to stressful situations. Specifically, the effects of trait anxiety on the evaluation of psychological and physical threats to well-being were examined in relation to state-anxiety. To accomplish this goal, a proposed model consisting of elements from the Lazarus and Folkman Stress and Coping Model (1984) and Spielberger's State Trait distinctions is presented. To our knowledge, this is the first proposed model to attempt to combine trait anxiety, primary and secondary appraisals, and state anxiety and to utilize path analytic models in assessing empirical …

Analysis Of The Role Of Residential Segregation On Perinatal Outcomes In Florida, Georgia And Louisiana, Tabia Henry Akintobi

USF Tampa Graduate Theses and Dissertations

The purpose of this study was to investigate the relationship between residential segregation (the physical separation of Blacks and Whites in residential contexts) and adverse perinatal outcomes (low birth weight, preterm delivery and small for gestational age births) in Florida, Georgia and Louisiana. The study determined the independent effect of the level of residential segregation on the likelihood of adverse perinatal outcomes after controlling for contextual and individual factors. The study also assessed whether the relationship between residential segregation and adverse perinatal outcomes were moderated by ethnicity and median income.The studied employed an observational, cross-sectional study design that utilized secondary …

Detection Of Pathogenic Bacteria And Fecal Enterococci In Recreational Water With An Evanescent Wave Fiber Optic Biosensor, Maria Theresa Trindade

USF Tampa Graduate Theses and Dissertations

Development of a rapid method for the detection of fecal enterococci and pathogenic microorganisms in beach water was attempted utilizing an evanescent wave fiber optic biosensor. Various assay formats including a sandwich immunoassay were tested in the development of a rapid assay. Fluorophore labeled antibodies were used for specific detection of bacteria captured or adsorbed directly to the surface of a polystyrene fiber optic waveguide. Binding of the fluorescent labeled antibody to its specific target or binding of a fluorescent labeled anti-IgG within 100-1000 nm of the waveguide surface caused excitation of the fluorescent conjugate resulting in a quantifiable signal. …

Mothers’ Versus Fathers’ Ratings Of Child Behavior Problems, Jessica K. Curley

USF Tampa Graduate Theses and Dissertations

The goal of this study was to examine how mothers and fathers view children's internalizing and externalizing behavior problems. More specifically, the relationship between certain factors, such as parental psychological symptoms, levels of interparental conflict, characteristics of the behaviors, and discrepancies in mothers' and fathers' ratings of behavior problems were studied in more depth. Using a between subjects, experimental design, mothers and fathers were randomly assigned to view a videotape and rate the behavior of a male or female child acting in either an internalizing, externalizing, or non-clinical manner. Results showed that there were no differences between mothers' and fathers' …

An Examination Of User Resistance In Mandatory Adoption Of Enterprise Systems, Timothy Paul Klaus

USF Tampa Graduate Theses and Dissertations

User resistance is an important issue in the implementation of an Enterprise System (ES). However, despite the prevalence of user adoption literature, user resistance literature is scarce. Although some studies have conceptualized user resistance as the opposite of user adoption, a mandatory, role-transforming system such as an ES clearly shows that users may use a system while resisting it. Although this area is highly relevant, it is theoretically underdeveloped. This study examines user resistance at the individual level of analysis to determine the underlying reasons for user resistance, the types of resistant behaviors, and the management strategies to minimize resistance. …

The Solubility Of Triton X-114 And Tergitol 15-S-9 In High-Pressure Carbon Dioxide Solutions, Brandon Smeltzer

USF Tampa Graduate Theses and Dissertations

In the sol gel production of high surface area catalyst, the template, a surfactant, is

the key component of the process. A template too soluble in the supercritical dryingextraction

process can yield a catalyst with a lower surface area. A template completely

insoluble in the supercritical drying-extraction process can lead to a longer calcinations

step and lower catalyst surface area. Template recovery also enhances the economic

feasibility of plant scale production of high surface area catalyst. For these reasons

knowing surfactant solubility in supercritical media is important.

The solubility of surfactants tert-octylphenoxypolyethoxyethanol (commercially

available and hereafter referred to as Triton …

Metacognitive Strategies In A Web-Enhanced Environment: The Effects On Achievement In Problem-Solving For Engineering Undergraduates, Sally A. Zabel

USF Tampa Graduate Theses and Dissertations

This study focused on the effects of using metacognitive strategy cuing integrated into problem-solving activities in a web-based learning environment. Purposes of the study were to investigate: (a) differences in posttest achievement between students who received metacognitive strategies embedded as cues in engineering problem sets and students who did not receive the treatment; (b) differences in perceptions of problem-solving skills between students who received metacognitive strategies embedded as cues in engineering problem set and students who did not receive the treatment; (c) differences in thermodynamics knowledge; (d) problem-solving steps students reported using across problem sets; (e) characteristics of sampled students, …

Physical Studies Of Glycosaminoglycans In Relation To The Adhesion Properties Of Human Cancer Cells, Antonio Peramo

USF Tampa Graduate Theses and Dissertations

The study of the processes relating glycobiology and cancer will have increased interest in coming years. To contribute to this trend the outcome of this work will be useful for investigations in glycobiology, using experimental methods exhibiting controlled carbohydrate composition, organization, and orientation, drawn from materials science and physics and that can be used in bioengineering and other technical areas in biology.

In this work, the focus has been on physical studies of some members of the family of glycosaminoglycans and their role in cancer metastasis. The project studies the static adhesion of cancer cells to substrates functionalized with cell …

A Rhetoric Of Sports Talk Radio, John D. Reffue

USF Tampa Graduate Theses and Dissertations

Sports talk radio is a broadcast format that has grown exponentially through the 1990's and into the early part of the twenty-first century. Academic publications about the format, especially qualitative analyses, have been extremely limited and previous radio content researchers have called for a more in-depth study of talk radio, in particular the relationships between and among callers, hosts and the listening audience.

This study examines sports talk radio as a format separate from political talk radio programming. An evolution of the format from its roots as a broadcast novelty to the modern day stand-alone genre is traced, including an …

Historical Morphodynamics Of John’S Pass, West-Central Florida, Jennifer Rose Krock

USF Tampa Graduate Theses and Dissertations

John’s Pass is a stable mixed-energy inlet located on a microtidal coast in Pinellas County, Florida. It is hydraulically connected to the northern portion of Boca Ciega Bay. Morphological analysis using a time-series of aerial photographs indicated that anthropogenic activities have influenced the evolution of the tidal deltas and adjacent shorelines at John’s Pass. Previous studies have documented the channel dimensions at the location of the existing bridge and calculated the tidal prism. A chronological analysis of these data yielded an increasing trend in the cross-sectional area at John’s Pass from 1873 to 2001. Anthropogenic activities occurring in Boca …

Occupational Exposure To Ultrafine Particles And Polycyclic Aromatic Hydrocarbons From Candle Emissions, David J. Silver

USF Tampa Graduate Theses and Dissertations

Ultrafine particles (UFPs) are present in the ambient atmosphere and are generated from atmospheric gases, pollution sources, and combustion. Candles emit carbonaceous soot particles similar to UFPs present in the ambient atmosphere. With the exception of lead, airborne concentrations of candle emissions have not been shown capable of causing cancer or cardiopulmonary disease during normal use. The purpose of this research is to determine the occupational risk associated with candle emissions.

Candle studies employ chambers to measure candle emission exposures and assess public health risk. Chambers used in previous studies did not match normal room conditions. They were affected by …

Reframing The National Football League: An Organizational Analysis Of The Construction Of A Modern Spectacle, Scott Charles Lewis

USF Tampa Graduate Theses and Dissertations

Popular and consumer cultures share a similar trajectory in the United States with spectacle and money being key ingredients in the construction of both. This is most apparent in the sports industry in America with billions of dollars in revenue generated every year. During the first half of the twentieth century sports like baseball and boxing commanded a significant amount of cultural and economic capital. It was not unheard of for sports teams, talented athletes and even a few select coaches to ascend to a legendary or even mythical status. The spectacle and revenue generating capacity of amateur and professional …

Adsorption Studies For Arsenic Removal Using Modified Chabazite, Ashutosh S. Vakharkar

USF Tampa Graduate Theses and Dissertations

Arsenic contamination in drinking water has been a cause of serious concerns across the United States as well as throughout the world. Over 70 million people in Eastern India, Bangladesh, Vietnam, Taiwan, and Northern China have been victims of arsenic poisoning. The USEPA has classified arsenic as a Class A carcinogen and recently reduced the Maximum Contaminant Level (MCL) in drinking water from 50ppb to 10ppb. The deadline for all the water utilities to meet this level is 23rd January 2006. To meet those drinking water standards, small water utilities need low cost and effective arsenic removal techniques.

Natural zeolites …

Differences In Frequency And Severity Of Violence For Intimate Terrorism Across Genders: A Test Of Johnson's Theory, Shelly Wagers

USF Tampa Graduate Theses and Dissertations

This study sought to further build on previous empirical findings regarding Johnsons theory that the gender symmetry debate can at least be partially resolved by acknowledging that two distinct subgroups of physical violence exist within intimate partner violence: Intimate Terrorism (IT) and Situational Couple Violence (SCV). According to Johnsons predictions these separate groups can be distinguished by the use of non-violent control tactics. This study focused on testing the ability of non-violent control tactics to predict the frequency and severity of violence within the sub-group intimate terrorism. It further explored Johnsons assertion that intimate terrorism is gender asymmetric with females …

The Relationship Between Plasticity Ratio And Hydraulic Conductivity For Bentonite Clay During Exposure To Synthetic Landfill Leachate, Whitney M. Allen

USF Tampa Graduate Theses and Dissertations

In landfill design, the containment of solid and liquid contaminant is essential. Leachate is produced from the biodegradation of the waste with the migration of liquid including rain-water through the heap. This liquid can become a health hazard if it leaches into the groundwater. Liners are placed beneath leachate collection systems to prevent leachate from seeping into the soil underneath the landfill.

Compacted clay liners, usually containing bentonite clay, are widely used. Bentonite can be characterized by its low hydraulic conductivity and high swell potential. With a low hydraulic conductivity, the liner can serve as a barrier. The high swell …

Social Structure And Social Learning In Delinquency: A Test Of Akers’ Social Structure-Social Learning Model, Stephen W. Verrill

USF Tampa Graduate Theses and Dissertations

Social learning theory (Akers, 1973, 1977, 1985, 1998; Burgess & Akers, 1966) is an established general theory of criminal, deviant, and conforming behavior that finds substantial empirical support (e.g., Akers, Krohn, Lanza-Kaduce & Radosevich, 1979; Akers, La Greca, Cochran & Sellers, 1989; Alarid, Burton & Cullen, 2000; Krohn, Skinner, Massey & Akers, 1985). Although the theory provides insight into the processes that influence criminal behavior, the theory does not speak to the environments that produce such behavior--the domain of structural theories.

Akers (1998) has suggested that social learning theory accounts for differences in crime rates through its mediation of structural …

Cognitive Dissonance In Early Colonial Pictorial Manuscripts From Central Mexico, Lorena Diane Mihok

USF Tampa Graduate Theses and Dissertations

This thesis examines the relationship between the imagery and glosses displayed on folios from the Codex Telleriano-Remensis, the Codex Magliabechiano, and the Codex Ixtlilxochitl through the application of Leon Festingers concept of cognitive dissonance in order to introduce an alternative approach to the study of codices as points of culture contact. The work analyzes the ways in which this psychological condition manifested itself in post-contact codex production as a result of sixteenth century political and social circumstances.

Festinger (1957:14) identifies the existence of cultural mores as a source of potential dissonance between culturally specific consonant elements. According to …

Perceived Barriers To Breast Cancer Screening: A Comparison Of African American And Caucasian Women, Natalie E. Bastien

USF Tampa Graduate Theses and Dissertations

Although the incidence of breast cancer is high among Caucasian women, African American women continue to experience higher breast cancer mortality and lower survival rates in comparison to Caucasian women of the same age and cancer stage (Thomas, 2004). Research regarding breast cancer screening among ethnic minority women from lower socioeconomic groups is extensive, but there is a lack of research that investigates barriers to breast cancer screening among African American women of higher socioeconomic status. The purpose of this study was to compare health beliefs of African American and Caucasian women regarding perceived barriers to breast cancer screening.

The …

Reconstruction Of Late Holocene Precipitation For Central Florida As Derived From Isotopes In Speleothems, Limaris R. Soto

USF Tampa Graduate Theses and Dissertations

Little is known about the paleo-precipitation of the Florida Peninsula. In order to better understand Floridas late Holocene climate variability (last 4,200 years), the isotopic composition was analyzed of four speleothems from two caves, in West-Central Florida. Two speleothems were collected from BRC Cave in Hernando County, and two others from Briar Cave in Marion County. This study represents the first speleothem-based paleoclimate records for Florida.

Uranium-series disequilibrium analyses were determined by using thermal ionization mass spectrometry (TIMS) to provide accurate determination of chronology of the deposition of the speleothems. Stable isotopic analyses of oxygen and carbon were performed using …

A Study In The Relationships Between Organizational Structures And Public Relations Practitioner Roles, Allison Stokes

USF Tampa Graduate Theses and Dissertations

While there exists extensive research in the area of public relations roles, as well as the arena of organizational structure, little research focuses on the relationship between organizational structure and the role of the public relations practitioner in the organization.

This study will provide a review of the different types of organizational structures, as well as a review of public relations practitioner roles. Organization theory literature supplies information on the characteristics of each structure, including levels of complexity and decentralization involved in each organizational type. Public relations literature includes research that aids in formulation of role classifications that may be …

Ammonium Distribution And Dynamics In Relation To Biological Production And Physical Environment In The Marguerite Bay Region Of The West Antarctic Peninsula, Yulia Mikhailovna Serebrennikova

USF Tampa Graduate Theses and Dissertations

In this study, biogeochemical regimes of Marguerite Bay and the adjacent part of the West Antarctic Peninsula (WAP) continental shelf were delineated through integration of nutrient, hydrographic, and biological measurements obtained during the LTER and SO GLOBEC studies during austral summer, autumn, and winter of 2001 and 2002.

Marguerite Bay biogeochemical regime was found to differ from those of the adjacent WAP continental shelf. In terms of Treguer and Jacques (1992), Marguerite Bay is a combination of Coastal Continental Shelf Zone (CCSZ) and Seasonal Ice Zone (SIZ) distinguished by shallow mixing regime, high primary production and export production. At the …