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Articles 4831 - 4860 of 6144

Full-Text Articles in Arts and Humanities

Improving Prostate Cancer Detection In Veterans Through The Development Of A Clinical Decision Rule For Prostate Biopsy, Owen T. Hill Jan 2006

Improving Prostate Cancer Detection In Veterans Through The Development Of A Clinical Decision Rule For Prostate Biopsy, Owen T. Hill

USF Tampa Graduate Theses and Dissertations

In the U.S., the number of prostate biopsies increases annually. This is partly due to elevated prostate specific antigen (PSA) values identified during PC screening. This study's goal was improving prostate cancer (PC) detection through developing a clinical decision rule (CDR), based on an elevated PSA and laboratory biomarkers. This decision rule could be used after an elevated PSA, providing the patient and clinician information to consider prior to biopsy. This cross-sectional study evaluated men from the Tampa, Florida, James A. Haley (JH) VA (N=1,378), from January 1, 1998, through April 15, 2005. The study hypothesized that specific lab biomarkers …

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Abrupt Climate Change During The Last Glacial Period: A Gulf Of Mexico Perspective, Heather W. Hill Jan 2006

Abrupt Climate Change During The Last Glacial Period: A Gulf Of Mexico Perspective, Heather W. Hill

USF Tampa Graduate Theses and Dissertations

Understanding the cause of abrupt climate change in the geologic past can help assess the potential magnitude and variability of future changes in regional and global climate. The research presented here focuses on some of the first records of hydrologic variability in the central North American continent during an interval of Marine Isotope Stage 3 (24-57 thousand years before present (ka)). Sediment core MD02-2551 from the Orca Basin, northern Gulf of Mexico, is used to document the first detailed melting history of the southern margin of the Laurentide Ice Sheet (LIS) during MIS 3, and to record terrestrial inputs from …

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Ferrite-Ferroelectric Thin Films With Tunable Electrical And Magnetic Properties, Ranko Heindl Jan 2006

Ferrite-Ferroelectric Thin Films With Tunable Electrical And Magnetic Properties, Ranko Heindl

USF Tampa Graduate Theses and Dissertations

A growing need for developing new multi-functional materials operating at microwave frequencies is demanding a better understanding of ferroelectric and ferrimagnetic materials and their combinations. Some of these materials exhibit tunable physical properties, giving an extra degree of freedom in the device design. New multifunctional ferroelectric and ferrimagnetic thin film structures are investigated in this dissertation research, in which dielectric and magnetic properties can separately be tuned over a certain frequency range. The materials of choice, Ba0.5Sr0.5TiO3 (BST) and BaFe12O19 (BaM), both well studied and used in many microwave applications, were prepared using rf magnetron sputtering and pulsed laser ablation. …

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West Tampa: Economic Development And Community Engagement Within An Urban Neighborhood, Jenna Holzberg Jan 2006

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 …

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Brain-Compatible Research: Using Brain-Based Techniques To Positively Impact Student Learning, Laurie A. Herson Jan 2006

Brain-Compatible Research: Using Brain-Based Techniques To Positively Impact Student Learning, Laurie A. Herson

USF Tampa Graduate Theses and Dissertations

This thesis discusses brain-based methodology and how educators can use brain-based techniques to impact, support, and advance cognitive growth. Current research on learning and memory is enabling educators to better understand how the brain learns and what environmental factors assist in or detract from student learning. Brain-based learning techniques are considered by brain-based researchers as one way to create a learning environment that fosters student learning at individual academic levels while concurrently challenging each student and promoting academic growth. Teachers can further student academic advancement through the direct manipulation of the classroom environment rather than by purchasing a particular program …

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Gold Mining In A Tropical Rainforest: Mercury Sorption To Soils In The Mining Region Of Arakaka-Matthew's Ridge, Guyana, Joniqua A'Ja Howard Jan 2006

Gold Mining In A Tropical Rainforest: Mercury Sorption To Soils In The Mining Region Of Arakaka-Matthew's Ridge, Guyana, Joniqua A'Ja Howard

USF Tampa Graduate Theses and Dissertations

Gold mining by artisinal (small-medium scale) miners causes an immense amount of damage to the environment (i.e. soil erosion, mobilization of heavy metals, etc.).1, 2 One of the most popular gold mining techniques employed by artisinal miners in Guyana is mercury amalgamation. During the amalgamation process approximately 300 metric tons/yr 11, 12 of mercury is used. Mercury once in the environment can be transported through the air, soil, and water column. It is estimated that 90-99% of total mercury (THg) is associated with the sediment. An understanding of the geochemical conditions that affect the fate of mercury in soils, which …

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Development And Evaluation Of An Inertial Based Pavement Roughness Measuring System, Fengxuan Hu Jan 2006

Development And Evaluation Of An Inertial Based Pavement Roughness Measuring System, Fengxuan Hu

USF Tampa Graduate Theses and Dissertations

Roughness is an important indicator of pavement riding comfort and safety. It is a condition indicator that should be carefully considered when evaluating primary pavements. At the same time, the use of roughness measurements plays a critical role in the pavement management system.There are many devices used for roughness evaluation. The major tools used for road roughness quantify are the road profilers. In the thesis research, in order to obtain useful pavement surface condition data for pavement evaluation, an inertial based pavement roughness measuring system was developed with the combination of modern sensor technology and computer technology. The research will …

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The Karst Of West-Central Florida, Lee John Florea Jan 2006

The Karst Of West-Central Florida, Lee John Florea

USF Tampa Graduate Theses and Dissertations

Caves, the cornerstone feature of karst aquifers, are little understood in Florida. This dissertation, which analyzes the morphology, elevation, lithologic setting, and hydrology of caves in west-central Florida, demonstrates that the karst of the unconfined Floridan aquifer differs from the paradigm view of karst presented in modern geology textbooks. The differences reflect setting: eogenetic (west-central Florida) vs. telogenetic (conventional). Interpretations about the architecture of cavernous porosity in this dissertation come from detailed surveys (497 stations) of seven air-filled caves.The surveys reveal that solution cavities within the unconfined Floridan aquifer align along NE-SW and NW-SE fractures. The surveys further identify tabular …

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The Influence Of The “Book Of Job” On The Middle English Morality Plays, Cameron Hunt-Logan Jan 2006

The Influence Of The “Book Of Job” On The Middle English Morality Plays, Cameron Hunt-Logan

USF Tampa Graduate Theses and Dissertations

The Book of Job was extremely popular in the Middle Ages, especially in England, because of its role in liturgy as well as lay religious devotion. I argue that the Book of Job was heavily influential in the writing of the medieval morality plays Castle of Perseverance, Mankind, Wisdom, and Everyman. In the plays, the dramatists mirrored many of Job's structural and artistic elements, creating direct parallels between the Biblical text and the morality plays. The authors also relied on Job's ideological framework to establish their own arguments, forming not only a textual but ideological linkage. Yet the most intriguing …

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Mentor And Mentee Perceptions Of The Importance And Effectiveness Of Mentor Support, Cenira Holcomb Jan 2006

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 …

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A Marriage Of Convenience: Batista And The Communists, 1933 – 1944, Charles Clayton Hollenkamp Jan 2006

A Marriage Of Convenience: Batista And The Communists, 1933 – 1944, Charles Clayton Hollenkamp

USF Tampa Graduate Theses and Dissertations

This paper examines the relationship between Fulgencio Batista and the Communist Party of Cuba. At odds during the first several years of Batista's rule, when strikes and repression were the topics of the day, the two sides eventually saw in each other a means to an end. In efforts to understand the Cuban Revolution of the late 1950's, historians often portray Batista as a dictatorial puppet of American business and policy. Contrary to this image, in his first regime (1934 until 1944), Batista presided over the creation of a nominal constitutional democracy. To do this he needed the support and …

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Salinity- And Temperature-Dependent Groundwater Flow In The Floridan Aquifer System Of South Florida, Joseph D. Hughes Jan 2006

Salinity- And Temperature-Dependent Groundwater Flow In The Floridan Aquifer System Of South Florida, Joseph D. Hughes

USF Tampa Graduate Theses and Dissertations

Density-dependent groundwater flow in the Floridan aquifer system (FAS) depends on chloride concentrations and fluid temperature. Previous studies addressing the role of chloride concentration and temperatures on groundwater flow in the FAS have relied on observation data or simplified two-dimensional numerical models. A three-dimensional hydrologic analysis of FAS in peninsular Florida was performed using a modified version of SUTRA (SUTRA-MS) capable of simulating multi-species solute and heat transport. SUTRA-MS was developed during this investigation and is capable of reproducing results for several problems with known solutions.The model was developed using available geometric and hydraulic parameter data and calibrated using hydraulic …

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The Relationship Between Nurses' Anxiety And Attitude Related To Pediatric Hospice, Teresa Lyn Hoover Jan 2006

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 …

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Hollow-Electrode Pulsed Plasma Deposition Of Titanium And Carbon Thin Films, Robert H. Hyde Jan 2006

Hollow-Electrode Pulsed Plasma Deposition Of Titanium And Carbon Thin Films, Robert H. Hyde

USF Tampa Graduate Theses and Dissertations

This thesis presents a study of a pulsed distributed arc plasma deposition method that has been developed to produce highly ionized pulsed plasma plumes of metallic species in the presence of a low-pressure inert or reactive gas glow discharge. A pulse-forming network (PFN) is used to form a transient electrical discharge in a hollow electrode which is triggered by two different methods; a pulsed CO2 laser or a pulsed high voltage glow discharge. With the PFN charged to a voltage of 70 - 100 VDC, current pulses with peak currents up to 3 kA and pulse widths as long 3.7 …

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Cranial Biomechanics And Feeding Performance Of Sharks, Daniel Robert Huber Jan 2006

Cranial Biomechanics And Feeding Performance Of Sharks, Daniel Robert Huber

USF Tampa Graduate Theses and Dissertations

The elasmobranch fishes possess a remarkable diversity of feeding mechanisms for a group containing relatively few species (~1200). The three most prevalent of these mechanisms involve prey capture during which the predator overtakes its prey (ram), prey is drawn into the mouth of the predator (suction), and relatively stationary consumption of sessile or substrate affixed prey (biting). Biomechanical modeling of cranial force distributions, in situ bite performance trials, and kinematic analysis of prey capture behaviors were employed to identify morphological and behavioral specializations and constraints associated with these feeding mechanisms in lemon Negaprion brevirostris (ram), whitespotted bamboo Chiloscyllium plagiosum (suction), …

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Tyrosinase-Like Activity Of Several Alzheimer’S Disease Related And Model Peptides And Their Inhibition By Natural Antioxidants, Kashmir Singh Juneja Jan 2006

Tyrosinase-Like Activity Of Several Alzheimer’S Disease Related And Model Peptides And Their Inhibition By Natural Antioxidants, Kashmir Singh Juneja

USF Tampa Graduate Theses and Dissertations

Neurodegenerative diseases are associated with loss of neurons ultimately leading to a decline in brain function. Alzheimer's disease (AD) is considered one of the most common neurodegenerative disorders that affects 16 million people worldwide. The cause of the disease remains unknown, although significant evidence proposes the amyloid Beta-peptide (A-Beta) as a potential culprit. The binding of Cu2+ by the soluble fragments of A-Beta have shown to form Type-3 copper centers and catalyze the oxidation of catechol-containing neurotransmitters. Furthermore, the use of flavonoids as antioxidants to slow or inhibit the neurotransmitter oxidation has suggested further health benefits with their consumption. A …

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A Comparability Analysis Of The National Nurse Aide Assessment Program, Peggy K. Jones Jan 2006

A Comparability Analysis Of The National Nurse Aide Assessment Program, Peggy K. Jones

USF Tampa Graduate Theses and Dissertations

When an exam is administered across dual platforms, such as paper-and-pencil and computer-based testing simultaneously, individual items may become more or less difficult in the computer version (CBT) as compared to the paper-and-pencil (P&P) version, possibly resulting in a shift in the overall difficulty of the test (Mazzeo & Harvey, 1988). Using 38,955 examinees' response data across five forms of the National Nurse Aide Assessment Program (NNAAP) administered in both the CBT and P&P mode, three methods of differential item functioning (DIF) detection were used to detect item DIF across platforms. The three methods were Mantel-Haenszel (MH), Logistic Regression (LR), …

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Spring Break: Image, Identity, And Consumer Culture In A Florida Rite Of Passage, Meeghan Kane Jan 2006

Spring Break: Image, Identity, And Consumer Culture In A Florida Rite Of Passage, Meeghan Kane

USF Tampa Graduate Theses and Dissertations

This thesis is a social history of spring break, examining the economic and social aspects of this youth culture phenomenon in Florida. Spring break follows the evolution of youth culture's increasingly complex relationship with an expanding consumer culture. I am exploring its many manifestations in music, film, and popular fiction, but also its rebellious expressions in the riots and arrests on Florida's beaches. I intend to focus on the small beach communities that were transformed by spring break, particularly Fort Lauderdale.Spring break in Florida dates back to the late 1920s in Palm Beach. Wealthy New England families spent their winters …

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A New Approach To Kainoids: Total Syntheses Of (-)-Kainic Acid And (+)-Allokainic Acid, Young Chun Jung Jan 2006

A New Approach To Kainoids: Total Syntheses Of (-)-Kainic Acid And (+)-Allokainic Acid, Young Chun Jung

USF Tampa Graduate Theses and Dissertations

(-)-Kainic acid and its C-4 epimer, (+)-allokainic acid are parent members of a class of substituted pyrrolidines known as kainoids. They have been found to exhibit powerful biological properties, principally neuroexcitatory. Kainic acid has become especially important in the study of Alzheimer's disease, epilepsy, and other neurological disorders. The total syntheses of (-)-kainic acid and (+)-allokainic acid were achieved using (L)-glutamic acid as the starting material and the sole source of stereochemical induction. The key steps for these successful syntheses involve formation of the gamma-lactam core via rhodium (II) catalyzed intramolecular C-H insertion of the alpha-diazo-alpha-(phenylsulfonyl)acetamide intermediate and the stereoselective …

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Differential Coupling Of Rgs3s And Rgs4 To Gpcr-Girk Channel Signaling Complexes, Cristina Jaén Jan 2006

Differential Coupling Of Rgs3s And Rgs4 To Gpcr-Girk Channel Signaling Complexes, Cristina Jaén

USF Tampa Graduate Theses and Dissertations

'Regulators of G protein signaling' (RGS proteins) modulate the G proteincycle by enhancing the GTPase activity of Ga subunits. These changesaccelerate the kinetics of ion channel modulation by Gai/o-coupled receptors(GPCRs) such as the G protein-gated inward rectifier K+ (GIRK/Kir3) channel. Myexperiments indicate that a single cerebellar granule (CG) neuron, a cell type thatendogenously expresses GIRK channels is able to express a wide variety ofRGS proteins. I selected two of them, which are widely expressed andtranscriptionally regulated during pathophysiologic conditions, to compare theirfunctional properties. I originally described the differential modulatory effects oftwo RGS proteins, the RGS3 short isoform (RGS3s) and RGS4, …

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Kinematics Of Curved Flexible Beam, Saurabh Jagirdar Jan 2006

Kinematics Of Curved Flexible Beam, Saurabh Jagirdar

USF Tampa Graduate Theses and Dissertations

Compliant mechanism theory permits a procedure called rigidbody replacement, in which two or more rigid links of the mechanism are replaced by a compliant flexure with equivalent motion. Methods for designing flexure with equivalent motion to replace rigid links are detailed in Pseudo-Rigid-Body Models (PRBMs). Such models have previously been developed for planar mechanisms. This thesis develops the first PRBM for spherical mechanisms. In formulating this PRBM for a spherical mechanism, we begin by applying displacements are applied to a curved beam that cause it todeflect in a manner consistent with spherical kinematics. The motion of the beam is calculated …

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Tampa’S Lafayette Street Bridge: Building A New South City, Lucy D. Jones Jan 2006

Tampa’S Lafayette Street Bridge: Building A New South City, Lucy D. Jones

USF Tampa Graduate Theses and Dissertations

The late nineteenth and early twentieth century was a time of dynamic social and political change for Tampa, a growing city on Florida's west coast. These changes led Tampa's commercial-civic elite to look beyond the law, the militia, and the church for ways to maintain their sense of order. This thesis illustrates non-violent enforcement of the status quo via public works, specifically bridge construction over the Hillsborough River. Over a period of three decades, three different bridges were built at the same place, at Lafayette Street. Each time the bridge was built or replaced, it was ostensibly for a different …

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Practical Applications Of Molecular Dynamics Techniques And Time Correlation Function Theories, Christina Ridley Kasprzyk Jan 2006

Practical Applications Of Molecular Dynamics Techniques And Time Correlation Function Theories, Christina Ridley Kasprzyk

USF Tampa Graduate Theses and Dissertations

The original research outlined in this dissertation involves the use of novel theoretical and computational methods in the calculation of molecular volume changes and non-linear spectroscopic signals, specifically two-dimensional infrared (2D-IR) spectroscopy. These techniques were designed and implemented to be computationally affordable, while still providing a reliable picture of the phenomena of interest. The computational results presented demonstrate the potential of these methods to accurately describe chemically interesting systems on a molecular level. Extended system isobaric-isothermal (NPT) molecular dynamics techniques were employed to calculate the thermodynamic volumes of several simple model systems, as well as the volume change associated with …

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Measurement And Modeling Of Oxides Of Nitrogen From Vehicular Contributors, Kerstin Lesley Kenty Jan 2006

Measurement And Modeling Of Oxides Of Nitrogen From Vehicular Contributors, Kerstin Lesley Kenty

USF Tampa Graduate Theses and Dissertations

The focus of this research was the examination of the emission and transformation of nitrogen oxides emitted from vehicles. Measured data for this experiment were collected from May 1 thru May 31, 2002, and were compared to values modeled with CALINE4. CALINE4 is a photochemical and dispersive model used to predict concentrations of NOX (NO+NO2) from line sources. The measurement campaign was coincident with the Bay Regional Atmospheric Chemistry Experiment (BRACE). An ambient air quality monitoring site was constructed adjacent to Gandy Boulevard, in Tampa, FL. When comparisons of measured and modeled NO and NO2 values were made it was …

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The Realism Of Hans Morgenthau, Brian A. Keaney Jan 2006

The Realism Of Hans Morgenthau, Brian A. Keaney

USF Tampa Graduate Theses and Dissertations

This thesis analyzes the life and career of Hans J. Morgenthau, commonly accepted as the father of the realist paradigm within the field of international relations. It does so by offering a dynamic revisionist account of the nature of Morgenthau's classical realism and suggests how the approach discussed might have wider application in the field of international relations. Traditional perspectives of Morgenthau suggest that in the course of his career, he changed from holding what would generally be labeled a conservative political viewpoint to a liberal political viewpoint. This thesis takes a different starting point. It does so by suggesting …

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Vigilance In African Americans: Cardiovascular Reactivity And Phasic Heart Period Reactions To Cued Threat And Nonthreat Stimuli, Thomas Starr King Jan 2006

Vigilance In African Americans: Cardiovascular Reactivity And Phasic Heart Period Reactions To Cued Threat And Nonthreat Stimuli, Thomas Starr King

USF Tampa Graduate Theses and Dissertations

African Americans are at a greater risk of developing cardiovascular disease and associated risk factors than are Whites, and recent research has suggested that the effects of racial discrimination are a significant contributor to this disparity. Thus, a preattentive bias and vigilance for threat might serve as a mechanism through which experienced racial discrimination would negatively impact cardiovascular health. A study was conducted to investigate the physiological and attentional underpinnings of vigilance for discriminatory threat via examination of phasic heart period (HP) responses to cued threat and nonthreat stimuli. Thirty African American and forty-two European American undergraduate students from a …

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Investigations Of Fiber Optic Temperature Sensors Based On Yb:Y3Al5O12, Jermaine L. Kennedy Jan 2006

Investigations Of Fiber Optic Temperature Sensors Based On Yb:Y3Al5O12, Jermaine L. Kennedy

USF Tampa Graduate Theses and Dissertations

This dissertation presents the development of temperature sensors which employ a fiber-optic probe consisting of single crystal YB3BAlB5BOB12B (YAG) fiber with a phosphor of short length grown directly onto one end using the laser heated pedestal growth method. The response of all the crystalline temperature sensors derives from the temperature-dependent decay time of fluorescence. Yb3+P ions served as the fluorescer, while the addition of various rare-earth codopants (i.e., NdP3+ and ErP3+) with YbP3+ provided an additional path in the form of phonon assisted energy transfer. With the additional nonradiative decay path, the temperature sensors exhibited a more desirable response. A …

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Workers, Unions, And The Globalization Of Production: Structural And Institutional Challenges For Organized Labor In The United States, Matthew Kohen Jan 2006

Workers, Unions, And The Globalization Of Production: Structural And Institutional Challenges For Organized Labor In The United States, Matthew Kohen

USF Tampa Graduate Theses and Dissertations

In this thesis, I argue that the globalization of production has weakened the power and efficacy of labor unions in the United States. I describe the globalization of production as a set of transformations in both the institutional structure of the economy and in the organization of production, and discuss how these transformations have impacted workers and unions in the American economy. The theoretical framework I employ is the social structure of accumulation approach, which emphasizes the importance of the institutional structures of capitalist economies and how their interaction with forms of production organization and systems of labor control helps …

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Measuring Culture: The Development Of A Multidimensional Culture Scale, Haitham A. Khoury Jan 2006

Measuring Culture: The Development Of A Multidimensional Culture Scale, Haitham A. Khoury

USF Tampa Graduate Theses and Dissertations

Fundamental to the debate of culture and its impact is the identification of the dimensions that comprise it. The impact of culture as an explanatory variable can be found in various social, scientific, and economic arenas, such as social perception, economic development, and the organization of industries and companies. By identifying and measuring these dimensions, researchers can then organize cultures empirically and develop complex descriptions of various cultures. The study aimed to test the structure of the dimensions proposed by Ho and Chiu (1994) by means of scale development. Test-item writers involved psychology graduate students of various nationalities with the …

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Reef Recovery Following The Late Devonian Mass Extinction: Evidence From The Dugway Range, West-Central Utah, Joseph G. Krivanek Jan 2006

Reef Recovery Following The Late Devonian Mass Extinction: Evidence From The Dugway Range, West-Central Utah, Joseph G. Krivanek

USF Tampa Graduate Theses and Dissertations

The biotic crisis of the Late Devonian Period involved three distinct peaks of extinction intensity and preferentially eliminated reef taxa. By the end of the second peak, the Frasnian-Famennian (F-F) boundary, the dominant constructor guild member of the mid-Paleozoic, the stromatoporoids, had ceased reef construction in most parts of the world. An undescribed stromatoporoid bioherm in the Dugway Range, west-central Utah, is one of the few locations where stromatoporoids continued building reefs into the mid-Famennian. The sections are well-constrained biostratigraphically using both conodonts and stromatoporoids and range from the latest Frasnian to the Early Carboniferous. The reefal faunas are depauperate …

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