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Articles 72781 - 72810 of 74531
Full-Text Articles in Entire DC Network
Mode Of Action And StructureActivity Studies Of NAlkylthio BLactams And NAlkylthio2Oxazolidinones, And Synthesis Of SecondGeneration Disulfide Inhibitors Of BKetoacyl Acyl Carrier Protein Synthase Iii (Fabh) As Potent Antibacterial Agents, Kevin David Revell
USF Tampa Graduate Theses and Dissertations
Work in the Turos group over the past five years has focused on the development of N-alkylthio beta-lactams, which show antibacterial activity against Staphylococcus (including MRSA), Bacillus, and others. These compounds do not function in the manner of the traditional beta-lactam antibiotics, but were thought to undergo an intracellular thiol-transfer to coenzyme A. In expanding the SAR of these novel compounds, it was found that N-alkylthio-2-oxazolidinones also exhibit antibacterial activity. Although CoA acts as the thiol-redox buffer in the genera most susceptible to the N-alkylthio beta-lactams, studies on Coenzyme A disulfide reductase (CoADR) show that the redox buffer is not …
Characterization Of Community-Acquired Methicillin-Resistant Staphylococcus Aureus By Pulsed-Field Gel Electrophoresis, Multilocus Sequence Typing, And Staphylococcal Protein A Sequencing: Establishing A Strain Typing Database, Jill Carolyne Roberts
USF Tampa Graduate Theses and Dissertations
Staphylococcus aureus has long been recognized as a leading cause of nosocomial infection. However, several recent publications have demonstrated this pathogen as the cause of community-acquired severe wound infections and necrotizing pneumonia in otherwise healthy individuals. These highly virulent endemic clones have been reported in several locations in the United States and Canada. The rapid spread of the organism, the ability of certain clones to cause serious infection, and the antibiotic resistance of the endemic clones, illustrates the importance of infection control measures. In this study we examined three S. aureus typing techniques; pulsed-field gel electrophoresis (PFGE), multilocus sequence typing …
Educational Backgrounds And Teaching Styles Of Athletic Training Educators In Entry-Level Caahep Accredited Athletic Training Programs Valerie J. Rich, Valerie J. Rich
Educational Backgrounds And Teaching Styles Of Athletic Training Educators In Entry-Level Caahep Accredited Athletic Training Programs Valerie J. Rich, Valerie J. Rich
USF Tampa Graduate Theses and Dissertations
The purpose of this study was to describe the educational backgrounds and teaching styles of athletic training educators and to see if a relationship existed between educational backgrounds and teaching styles. An electronic survey was e-mailed to 338 Program Directors of CAAHEP accredited undergraduate and graduate athletic training education programs. The survey was also posted on the athletic training educator's listserv to recruit more participants. The survey contained questions regarding demographics and educational history, as well as the Teaching Styles Inventory (Grasha, 2002). A total of 198 athletic training educators responded to the survey, and 174 filled out the survey …
Menendez Versus Mickey: A Study Of Heritage Tourism In Florida, Monica Rowland
Menendez Versus Mickey: A Study Of Heritage Tourism In Florida, Monica Rowland
USF Tampa Graduate Theses and Dissertations
The National Trust for Historic Preservation defines heritage tourism as: "traveling to experience the places and activities that authentically represent the stories and peoples of the past and present. It includes irreplaceable historic, cultural, and natural resources." Heritage tourism is a lucrative industry in the United States. On average, heritage tourists spend $623 per trip compared to $457 for all U.S. travelers. The rise of heritage tourism is inextricably linked with several trends in American society, namely: the historic preservation movement, the desire for a sense of place, and nostalgia. These motivating tendencies often inspire problems of authenticity, commodification, and …
An Analysis Of The Legal Contexts Of Public Education Law: Its Judicial Interpretations And Applications With Regard To Discipline And Special Education And Non-Special Education Students In K-12 Public Schools, Janet Marie Roland
USF Tampa Graduate Theses and Dissertations
This study investigated legal implications of differential disciplinary treatment of special education and non-special education students in K-12 public schools. It focused on interpreting and applying federal and state education legislation by courts and how various judicial decisions affect discipline practices in public school systems, asking if preferential treatment was afforded to students with disabilities through implementation and interpretation of educational legislation.The historical myriad of complex legislation passed before and after inception of Public Law 94-142 in 1975 was studied, exploring relationships between school discipline of children who do and do not receive special education services. Research included review of …
Effects Of Gopher Tortoise (Gopherus Polyphemus) Translocation On Movements, Reproductive Activity, And Body Condition Of Resident And Translocated Individuals In Central Florida, Susannah Christina Riedl
Effects Of Gopher Tortoise (Gopherus Polyphemus) Translocation On Movements, Reproductive Activity, And Body Condition Of Resident And Translocated Individuals In Central Florida, Susannah Christina Riedl
USF Tampa Graduate Theses and Dissertations
Human-caused destruction of xeric habitats in Florida that support gopher tortoises (Gopherus polyphemus Daudin) is occurring at a rapid rate. One conservation strategy that has been used for numerous taxa is translocation. The effects of translocation on the health, reproductive activity, and movements of translocated and resident telemetered individuals was evaluated for a population of gopher tortoises in central-Florida from 2001 to 2004. Only one of the 13 individuals released left the site during the study. The home range estimates of resident individuals were not significantly different before and after the release of the translocated individuals on the site, and …
How To Hear The Unspoken: Engaging Cross-Cultural Communication Through The Latin American Testimonial Narrative, Elena Flores Ruiz-Aho
How To Hear The Unspoken: Engaging Cross-Cultural Communication Through The Latin American Testimonial Narrative, Elena Flores Ruiz-Aho
USF Tampa Graduate Theses and Dissertations
This project seeks to address issues in cultural politics brought on by difficulties in cross-cultural communication, particularly as these problems manifest themselves in twentieth century Latin American testimonial narratives. By developing a critical line of questioning drawn from Gayatri Spivak's influential article "Can the Subaltern Speak," one aim herein is to analyze and describe the ways in which the narrative, Me Llamo Rigoberta Menchú Me Nació la Conciencia, translated into English as I, Rigoberta Menchú: An Indian Woman in Guatemala, exemplifies the incommensurable nature of cross-cultural discursive attempts. This is done through a twofold method: one, by placing heavy emphasis …
A Study On The Calibration And Accuracy Of The One-Step Tdr Method, Brian David Runkles
A Study On The Calibration And Accuracy Of The One-Step Tdr Method, Brian David Runkles
USF Tampa Graduate Theses and Dissertations
Traditional in-situ soil compaction monitoring methods are often limited in their application, thus quality control of compacted fills and roadway embankments remains a challenging problem. As a result, new methods are being developed to more accurately measure in-situ compaction parameters. Time domain reflectometry (TDR) is one such method. Several advances have been made over the past few years to further the use of TDR technology in water content and density measurement of compacted fill. The one-step method relies on the measurement of the apparent dielectric constant in conjunction with the bulk electrical conductivity, and correlates them through two soil-specific constants, …
Women In Nontraditional Careers, Teresa Ann Roche
Women In Nontraditional Careers, Teresa Ann Roche
USF Tampa Graduate Theses and Dissertations
In a traditional male dominated field such as construction, and automotive technology, artificial barriers and attitudes have often prevented qualified females from reaching their full potential. The late entrance of females into these fields has created very few role models for nontraditional younger females entering these professions. This study was designed to create a profile for nontraditional females working in a male dominated work force. A large percentage of females have experienced some barriers due to discrepancies in gender performance. Acceptance by peers, community and administrators, combined with the challenge of balancing family and career appears to be areas of …
Structure And Dynamics Of Heterogeneous Molecular Systems, Alfred B. Roney
Structure And Dynamics Of Heterogeneous Molecular Systems, Alfred B. Roney
USF Tampa Graduate Theses and Dissertations
Although current classical force fields describe homogeneous single-componentsystems fairly well, they do not represent the response of an individual molecule's electronic structure to its local environment with enough detail to reliably predict atomic motions in interfacial regions such as a solvation structure or liquid surface.Since most chemical processes of non-trivial interest involve two or more dissimilar molecules interacting at a short distance, molecular models must accurately simulate the interactions between different molecular species as well as bulk behavior in order to provide useful information. Results from two simulation studies are presented to illustrate both the utility of current point-charge electrostatics …
Zeolite Synthesis From Municipal Solid Waste Ash Using Fusion And Hydrothermal Treatment, Maysson Sallam
Zeolite Synthesis From Municipal Solid Waste Ash Using Fusion And Hydrothermal Treatment, Maysson Sallam
USF Tampa Graduate Theses and Dissertations
This dissertation investigates the possibility of producing zeolites from municipal solid waste ash, MSW ash, by using hydrothermal treatment alone and by introducing fusion at 550 °C prior to hydrothermal treatment. The study was performed at different treatment conditions where silica/aluminum ratio of 13.9 and 2.5, hydroxide concentrations of 1.5N, 2.5N and 3.5N, temperatures at 100°C and 60 °C and time at 6, 24 and 72 hours were the major variables used to study zeolites synthesis process. The possibility of forming zeolites A, P1 and X was of particular interest in the present study. Factors, mechanism and modeling of zeolite …
Using Fuzzy Logic To Enhance Control Performance Of Sliding Mode Control And Dynamic Matrix Control, Edinzo J. Iglesias Sanchez
Using Fuzzy Logic To Enhance Control Performance Of Sliding Mode Control And Dynamic Matrix Control, Edinzo J. Iglesias Sanchez
USF Tampa Graduate Theses and Dissertations
Two application applications of Fuzzy Logic to improve the performance of two controllers are presented. The first application takes a Sliding Mode Controller designed for chemical process to reject disturbances. A fuzzy element is added to the sliding surface to improve the controller performance when set point change affects the control loop; especially for process showing highly nonlinear behavior. This fuzzy element, , is calculated by means of a set of fuzzy rules designed based on expert knowledge and experience. The addition of improved the controller response because accelerate or smooth the controller as the control loop requires. The Fuzzy …
Archival Evaluation Of A Proactive School-Wide Discipline Plan, Beth Rutz-Beynart
Archival Evaluation Of A Proactive School-Wide Discipline Plan, Beth Rutz-Beynart
USF Tampa Graduate Theses and Dissertations
The study conducted was an archival review of school detailed incident discipline records and description of the school-wide proactive discipline plan developed at an elementary school. The study examined the effects of sequential changes in a proactive school-wide discipline plan. Initially, the baseline data consisted of a full year of school without a proactive school-wide discipline plan. This allowed an assessment of the variation in referrals that occurred across a school year. Subsequent years were assessed in relation to this baseline, and the effects from year to year compared to other years. After the baseline year, substantial changes were made …
Precipitation Variability Of Streamflow Fraction In West Central Florida, Michael H. Scott
Precipitation Variability Of Streamflow Fraction In West Central Florida, Michael H. Scott
USF Tampa Graduate Theses and Dissertations
There is a strong interest to develop a method to estimate mean annual ungaged streamflow with varying precipitation. A method was developed utilizing GIS and other statistical analysis to estimate ungaged mean annual streamflow. This method utilizes a normalized streamflow fraction (NSF) method previously developed which relies on drainage basin area, coupled with mean annual local precipitation, to estimate the ungaged streamflow variability. This method has been applied to west central Florida.The test of the method yielded an R squared value of 0.9894, proceeded by a verification that yielded an R squared value of 0.998. This method is believed to …
Detecting Publication Bias In Random Effects Meta-Analysis: An Empirical Comparison Of Statistical Methods, Gianna Rendina-Gobioff
Detecting Publication Bias In Random Effects Meta-Analysis: An Empirical Comparison Of Statistical Methods, Gianna Rendina-Gobioff
USF Tampa Graduate Theses and Dissertations
Publication bias is one threat to validity that researchers conducting meta-analysis studies confront. Two primary goals of this research were to examine the degree to which publication bias impacts the results of a random effects meta-analysis and to investigate the performance of five statistical methods for detecting publication bias in random effects meta-analysis. Specifically, the difference between the population effect size and the estimated meta-analysis effect size, as well as the difference between the population effect size variance and the meta-analysis effect size variance, provided an indication of the impact of publication bias. In addition, the performance of five statistical …
Spin Polarization Measurements And Sensor Applications In Thin Films And Carbon Nanotube-Based Devices, Jeff T. Sanders
Spin Polarization Measurements And Sensor Applications In Thin Films And Carbon Nanotube-Based Devices, Jeff T. Sanders
USF Tampa Graduate Theses and Dissertations
The unique properties of carbon nanotubes (CNTs) show a great deal of potential for nanoelectronic devices, spintronic devices, biosensing and chemical sensing applications. Their applicability as interconnects for spintronic devices derives from their one-dimensionality and theoretically predicted preservation of spin current. In this work, we combine an investigation of spin polarization in materials such as half metallic oxides in thin film and bulk form with studies on several aspects of CNTs for sensing and spin transport applications. These two areas of study are intimately related within the umbrella of spin-electronics and nanoscale sensors that are being pursued with great topical …
An Investigation Of A Dual-Factor Model Of Mental Health And Related Physical Health Outcomes Among Early Adolescents, Emily J. Shaffer
An Investigation Of A Dual-Factor Model Of Mental Health And Related Physical Health Outcomes Among Early Adolescents, Emily J. Shaffer
USF Tampa Graduate Theses and Dissertations
This study investigated the mental and physical health of early adolescents (n = 339) using a dual-factor model of mental health. When employing a dual-factor model, mental well-being is not simply assumed from the absence of negative indicators of mental health (psychopathology). Rather, assessments of positive indicators of mental health (subjective well-being) are used to determine one's level of mental wellness. The current study tested the existence of a dual-factor model of mental health by examining the separability of participants' reports of subjective well-being and psychopathology. Specifically, the researcher hypothesized that the assessment of both of these constructs would result …
The Social Construction Of School Refusal: An Exploratory Study Of School Personnel’S Perceptions, Anna Marie Torrens Salemi
The Social Construction Of School Refusal: An Exploratory Study Of School Personnel’S Perceptions, Anna Marie Torrens Salemi
USF Tampa Graduate Theses and Dissertations
Despite a multi-disciplinary, international literature, little research has drawn attention to the phenomenon of school refusal within the school. Most research on school refusal follows a positivist paradigm, focusing on the student, instead of examining the role of schools. Using a qualitative design and a social constructionist framework, this study explored how school personnel perceive school refusal, focusing on the social interactions, processes, and perceptions that construct their understanding. The study was conducted in a large school district in the Southeastern United States.Semi-structured in-depth interviews were conducted with school personnel at the middle school (N=42), high school (N=40), and district …
Intelligibility Of Clear Speech At Normal Rates For Older Adults With Hearing Loss, Billie Jo Shaw
Intelligibility Of Clear Speech At Normal Rates For Older Adults With Hearing Loss, Billie Jo Shaw
USF Tampa Graduate Theses and Dissertations
Clear speech refers to a speaking style that is more intelligible than typical, conversational speaking styles. It is usually produced at a slower rate compared to conversational speech. Clear speech has been shown to be more intelligible than conversational speech for a large variety of populations, including both hearing impaired (Schum, 1996; Picheny, Durlach, & Braida, 1985; and Payton, Uchanski, & Braida, 1994) and normal hearing individuals (e.g. Uchanski, Choi, Braida, Reed, & Durlach, 1996) under a variety of conditions, including those in which presentation level, speaker, and environment are varied. Although clear speech is typically slower than normally produced …
Regulation Of Transcription And Analysis Of Drug Targets In Lymphoma And Myeloma Cells, Noah L. Silverman
Regulation Of Transcription And Analysis Of Drug Targets In Lymphoma And Myeloma Cells, Noah L. Silverman
USF Tampa Graduate Theses and Dissertations
The passage of two major hurricanes across southwest Florida (Category 5, Labor Day Hurricane of 1935; Category 4, Hurricane Donna 1960) resulted in fragmentation of mangrove forest at Big Sable Creek, Everglades National Park. Over time forest fragmentation led to forest loss and patchy conversion to unvegetated mudflats. My goal was to determine the consequence of forest fragmentation on nekton (i.e., fish and decapod crustaceans) inhabiting the intertidal zone. I used block nets across intertidal rivulets to compare nekton leaving replicate forest and unvegetated mudflat sites from October, 2002 through April 2004. Overall nekton density (individuals per 100 m3) was …
Effects Of A Multi-Component Interdependent Group Contingency Game On The Classroom Behaviors Of Typically Developing Elementary School Children, Stacey D. Simonds
Effects Of A Multi-Component Interdependent Group Contingency Game On The Classroom Behaviors Of Typically Developing Elementary School Children, Stacey D. Simonds
USF Tampa Graduate Theses and Dissertations
Research in the field of applied behavior analysis indicates that all group-contingency programs have been effective in both increasing academic and behavior success in the classroom environment. Among the three types of group-contingency programs, this study investigated the effects of a multiple component interdependent group-oriented contingency program on the behavior of typically developing elementary students. The purpose of this study was to develop and analyze the effects of a classroom management system that teachers or educators could utilize to minimize problematic classroom behaviors while increasing adaptive classroom behaviors. The study was conducted within two third-grade classrooms from a local school …
Correlates Of Weight In Adolescents: A Path Analysis, Angela T. Sheble
Correlates Of Weight In Adolescents: A Path Analysis, Angela T. Sheble
USF Tampa Graduate Theses and Dissertations
This study examined the interrelationships between adolescent weight and several other variables thought to impact weight and obesity: physical activity, depressive symptoms, binge-eating symptoms, dieting, socio-economic status, special education status, gender, and ethnicity. The sample consisted of 251 high school students in rural Florida who completed measures of depression, binge-eating, dieting, and physical activity. Measurement instruments included the Reynolds Adolescent Depression Scale-2nd Edition (RADS-2), the bulimia scale of the Eating Disorder Inventory-2 (EDI-2), the dieting scale of the Dutch Eating Behavior Questionnaire (DEBQ), and a physical activity questionnaire derived from the Youth Risk Behavior Scale for Students (YRBSS). The study …
Assessment Of Biogeochemical Deposits In Landfill Leachate Drainage Systems Phase Ii, Abdul R. Mulla Saleh
Assessment Of Biogeochemical Deposits In Landfill Leachate Drainage Systems Phase Ii, Abdul R. Mulla Saleh
USF Tampa Graduate Theses and Dissertations
Land disposal of solid waste is a vital component of any solid waste management system. Design, operation and closure of municipal solid waste (MSW) landfills are required by regulations to control leachate and gases generated during the life, closure,and post-closure of the facility. Clogging of leachate drainage and removal systems in landfills is a common phenomenon and has been acknowledged in several landfills throughout the United States and abroad. This project was conducted in two phases. Phase I was completed in February of 2005 and Phase II was completed in August of 2006. Leachate characteristics data obtained in Phase I …
Growth And Physical Properties Of Magnetite Thin Films, Chamila S. Siyambalapitiya
Growth And Physical Properties Of Magnetite Thin Films, Chamila S. Siyambalapitiya
USF Tampa Graduate Theses and Dissertations
This project focused on two aspects of magnetite thin films. The first was to find optimum parameters and conditions for deposition of stoichiometeric Magnetite films using pulsed laser deposition (PLD). The second aspect was the characterization of the magnetic and electrical properties in order to broaden the spectrum of understanding of PLD Magnetite films. These properties were also investigated in terms of the substrates on which the films were deposited. Discussed in this thesis are deposition parameters, structural characteristics, magnetic and electrical characteristics of the films in terms of different substrates and film thicknesses. The discussion consists of structural parameters …
The Causal Effect Of Alcohol Consumption On Employment Status, Chanvuth Sangchai
The Causal Effect Of Alcohol Consumption On Employment Status, Chanvuth Sangchai
USF Tampa Graduate Theses and Dissertations
Alcohol consumption may affect labor market outcomes directly through a reduction in productivity and indirectly through human capital accumulation. However, empirical results from previous studies in the economics literature are mixed and inconclusive. While some researchers found negative effects of alcohol use on labor market outcomes, quite a few studies found either positive or insignificant effects. The purpose of this dissertation is to estimate causal effects of alcohol consumption on employment status. It uses three data sets previously unexploited for this purpose and attempts to eliminate any potential estimation problems from previous studies. The results show that previous problematic heavy …
Crossing Locations, Light Conditions, And Pedestrian Injury Severity, Naved Alam Siddiqui
Crossing Locations, Light Conditions, And Pedestrian Injury Severity, Naved Alam Siddiqui
USF Tampa Graduate Theses and Dissertations
This study assesses the role of crossing locations and light conditions in pedestrian injury severity through a multivariate regression analysis to control for many other factors that also may influence pedestrian injury severity. Crossing locations include midblock and intersections, and light conditions include daylight, dark with street lighting, and dark without street lighting. The study formulates a theoretical framework on the determinants of pedestrian injury severity, and specifies an empirical model accordingly. An ordered probit model is then applied to the KABCO severity scale of pedestrian injuries which occurred while attempting street crossing in the years 1986 to 2003 in …
Heme Biosynthesis: Structure–Activity Studies Of Murine Ferrochelatase, Zhen Shi
Heme Biosynthesis: Structure–Activity Studies Of Murine Ferrochelatase, Zhen Shi
USF Tampa Graduate Theses and Dissertations
Ferrochelatase catalyzes the terminal step of heme biosynthesis by inserting ferrous iron into protoporphyrin IX. The current study is aimed at understanding the structural basis of porphyrin binding and distortion in ferrochelatase-catalyzed reaction by functional analysis of a highly conserved active site loop motif. The loop was shown to contact bound porphyrin based on crystallographic and molecular modelling observations, and its role in murine ferrochelatase was assessed by random mutagenesis and steady-state kinetic analysis. To overcome the limitations of conventional kinetic assay methods for ferrochelatase, a continuous assay was developed by monitoring porphyrin fluorescence decrease using natural substrates ferrous iron …
Geochemical Signatures In The Coral Montastraea: Modern And Mid-Holocene Perspectives, Jennifer Mae Smith
Geochemical Signatures In The Coral Montastraea: Modern And Mid-Holocene Perspectives, Jennifer Mae Smith
USF Tampa Graduate Theses and Dissertations
In the first phase of this project, four decades of monthly resolved geochemical variations from two massive heads of Montastraea were used to explore the reproducibility of the geochemical signal in these two corals from Looe Key, Florida. The coral d18O and d13C records of the two corals have statistically indistinguishable mean values, which is not the case for the coral Sr/Ca records implying that nonenvironmental factors are influencing coral Sr/Ca. Calibration equations relating coral geochemistry variations to environmental variations at Looe Key are different from previously published equations for Montastraea. These calibration differences are not related to growth-related kinetic …
Holocene Climate And Hydrologic Changes Recorded In Tufa And Lacustrine Deposits In Southern Yemen, Kirk M. Sander
Holocene Climate And Hydrologic Changes Recorded In Tufa And Lacustrine Deposits In Southern Yemen, Kirk M. Sander
USF Tampa Graduate Theses and Dissertations
Tufa and lacustrine deposits are useful paleoclimate archives in reconstructing the early to middle Holocene climate and paleohydrology of southern Yemen's Wadi Idim and Wadi Sana, which are north-flowing tributaries to Wadi Hadramawt. Numerical age estimates and oxygen-isotopes are used to assess the onset and cessation of tufa formation and reconstruct the environment of lacustrine sediment deposition in the region in order to understand the broader early to middle Holocene hydrologic system.Numerical age estimates from the studied wadis show a correspondence between early to mid-Holocene humid-phase sediment deposition and the northward shift of the ITCZ, as documented in paleoclimate records …
Selling St. Petersburg: John Lodwick And The Promotion Of A Florida Paradise, Nevin D. Sitler
Selling St. Petersburg: John Lodwick And The Promotion Of A Florida Paradise, Nevin D. Sitler
USF Tampa Graduate Theses and Dissertations
For over a century Florida's Tampa Bay area has been extolled for its abundant seashores and moderate climate. The success of early twentieth-century St. Petersburg as a tourist destination was due to a consistent method of self-promotion highlighting the natural and physical features of peninsular Pinellas County. Warmed by balmy Tampa Bay breezes, St. Petersburg had been dubbed the "Health City." This tiny 1890 coastal town of less than three hundred inhabitants, now blessed with a slogan, new train tracks, and a railway pier, was an ideal setting for tourism. By 1902, boosters declared St. Petersburg a city second to …