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Product Design: A Conceptual Development Of Product Remanufacturing Index, Swapnil B. Dixit
Product Design: A Conceptual Development Of Product Remanufacturing Index, Swapnil B. Dixit
USF Tampa Graduate Theses and Dissertations
In light of increasing pressure from environmental safety advocate groups and governments for eco-friendly manufacturing, safe after life product & waste disposal has had strong emphasizes in the past several years. Industrial manufacturers are becoming more and more responsive towards environment safety concerns. These efforts are being reflected by concepts such as green design or environmentally responsible design and manufacturing (ERDM). The key research areas in the 21st century for reducing the toll on the environment will be material recycling, controlled waste disposal (including fluids and gases) and remanufacturing. Remanufacturing offers a dual advantage over material recycling. First the geometrical …
Unit Testing Database Applications Using Specdb: A Database Of Software Specifications, Rana Farid Mikhail
Unit Testing Database Applications Using Specdb: A Database Of Software Specifications, Rana Farid Mikhail
USF Tampa Graduate Theses and Dissertations
In this dissertation I introduce SpecDB, a database created to represent and host software specifications in a machine-readable format. The specifications represented in SpecDB are for the purpose of unit testing database operations. A structured representation aids in the processes of both automated software testing and software code generation, based on the actual software specifications. I describe the design of SpecDB, the underlying database that can hold the specifications required for unit testing database operations.Specifications can be fed directly into SpecDB, or, if available, the formal specifications can be translated to the SpecDB representation. An algorithm that translates formal specifications …
Resonance Ultrasonic Vibrations (Ruv) For Crack Detection In Silicon Wafers For Solar Cells, William Dallas
Resonance Ultrasonic Vibrations (Ruv) For Crack Detection In Silicon Wafers For Solar Cells, William Dallas
USF Tampa Graduate Theses and Dissertations
The photovoltaic industry provides a pathway to allow renewable energy to meet world wide consumer energy needs. Past and present research and development on silicon based solar cells have helped make them the dominant player in the photovoltaic industry accounting for over 75% in 2005 as accounted by the US Department of Energy. One of the current technological problems is to identify and eliminate sources of mechanical defects such as thermo-elastic stress and cracks leading to the loss of wafer integrity and ultimately breakage of as-grown and processed Si wafers and cells.The RUV method, developed at the University of South …
Reliability-Centric Probabilistic Analysis Of Vlsi Circuits, Thara Rejimon
Reliability-Centric Probabilistic Analysis Of Vlsi Circuits, Thara Rejimon
USF Tampa Graduate Theses and Dissertations
Reliability is one of the most serious issues confronted by microelectronics industry as feature sizes scale down from deep submicron to sub-100-nanometer and nanometer regime. Due to processing defects and increased noise effects, it is almost impractical to come up with error-free circuits. As we move beyond 22nm, devices will be operating very close to their thermal limit making the gates error-prone and every gate will have a finite propensity of providing erroneous outputs. Additional factors increasing the erroneous behaviors are low operating voltages and extremely high frequencies. These types of errors are not captured by current defect and fault …
Transmission Power Control For Wireless Sensors Networks, Karim Souccar
Transmission Power Control For Wireless Sensors Networks, Karim Souccar
USF Tampa Graduate Theses and Dissertations
Energy saving, in battery operated wireless sensor networks, for the purpose of increasing the node and network lifetime, has gained substantial importance. This research was conducted with the objective of reducing the power consumption of the MICA2 sensors. The objective was pursued by manipulating the MAC layer, and by introducing a dynamic transmission power control algorithm. A new simulation tool was developed in order to reduce the complexity related to the design and testing of the transmission power control algorithm. The power control algorithm was also developed in the NesC language for the MICA2 sensors. In addition,several modifications were introduced …
Electromagnetic Characterization Of Miniature Antennas For Portable Devices, Diana P. Aristizabal
Electromagnetic Characterization Of Miniature Antennas For Portable Devices, Diana P. Aristizabal
USF Tampa Graduate Theses and Dissertations
Advances in technology have placed a great emphasis on the design of broadband antennas as well as antenna miniaturization to cope with the demands of making electronic and handheld communication devices smaller and more efficient. In this thesis, the design and fabrication of a frequency independent antenna and a narrow-band planar microstrip Balun are presented. An analysis of frequency selective surfaces is also introduced in order to demonstrate their capability to miniaturize antenna thickness. Lastly, s-parameters measurements and efficiency characterization are performed to determine the radiation properties of surface mount chip inductors in order to determine the feasibility of using …
Ieee 802.11b Wireless Lan Sensor System And Antenna Design, Leonard Guerra
Ieee 802.11b Wireless Lan Sensor System And Antenna Design, Leonard Guerra
USF Tampa Graduate Theses and Dissertations
A novel approach to miniaturizing an 802.11b WLAN card using folded-flex ultra-thin substrates is presented. A 73 percent reduction in size was realized using hybrid circuits on FR4 and polyimide. There is even more potential for further reduction if more copper layers are used. The miniaturized 802.11b WLAN cards were used to design 802.11b wireless sensor nodes. A research test-bed was setup to study how 802.11b networked sensor nodes could operate in the field. There are many applications for such sensor networks like habitat monitoring, object tracking, seismic detection, military surveillance, or fire detection to name a few. This investigation …
Low-Power Flip-Flop Using Internal Clock Gating And Adaptive Body Bias, Jorge Alberto Galvis
Low-Power Flip-Flop Using Internal Clock Gating And Adaptive Body Bias, Jorge Alberto Galvis
USF Tampa Graduate Theses and Dissertations
This dissertation presents a new systematic approach to flip-flop design using Internal Clock Gating, (ICG), and Adaptive Body-Bias, (ABB), in order to reduce power consumption. The process requires careful transistor resizing in order to maintain signal integrity and the functionality of the flip-flop at the target frequency.A novel flip-flop architecture, based on the Transmission Gate Flip-Flop, (TGFF), which incorporated ICG and ABB techniques, was designed. This architecture was simulated intensively in order to determine under what conditions its use is appropriate. In addition, it was necessary to establish a methodology for creating a standard testbench and environment setup for the …
Ventricle Slice Detection In Mr Images Using Hough Transform And Object Matching Techniques, Chintan Thakkar
Ventricle Slice Detection In Mr Images Using Hough Transform And Object Matching Techniques, Chintan Thakkar
USF Tampa Graduate Theses and Dissertations
The determination of the center slice, defined as a slice through the lateral ventricles in the axial plane in a volume of MR images is important to the segmentation of the image into its anatomical parts. The center or ventricle slice in a set of MR images is recognized by the shape of the ventricles in the axial plane as depicted by the cerebro-spinal fluids in the image. Currently, no technique exists to detect this slice and the purpose of this thesis is to find a slice through the lateral ventricles in the axial plane from a volume of MRI …
Freedom Fighters, Freedom Haters, Martyrs, And Evildoers: The Social Construction Of Suicide Terrorism, Cã©Cile Valã©Rie Van De Voorde
Freedom Fighters, Freedom Haters, Martyrs, And Evildoers: The Social Construction Of Suicide Terrorism, Cã©Cile Valã©Rie Van De Voorde
USF Tampa Graduate Theses and Dissertations
Suicide terrorism is characterized by the willingness of physically and psychologically war-trained individuals to die while destroying or attempting to annihilate enemy targets in furtherance of certain political or social objectives. Rooted in the historical, social, and psychological dimensions of international terrorism, suicide terrorism is neither a unique nor a new phenomenon. Its recent resurgence and the extensive media coverage it has received account for the misleading uniqueness of this violent, complex, and adaptive form of terrorism. This qualitative study examines the definitional and rhetorical processes by which suicide terrorism is socially constructed. Using a social constructionist theoretical framework coupled …
Vigilance In African Americans: Cardiovascular Reactivity And Phasic Heart Period Reactions To Cued Threat And Nonthreat Stimuli, Thomas Starr King
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 …
Laboratory Analysis Of Staphylococcus Aureus In Florida From January 1, 2003 To December 31, 2005 With An Emphasis On Methicillin Resistance, Stephanie Kolar
Laboratory Analysis Of Staphylococcus Aureus In Florida From January 1, 2003 To December 31, 2005 With An Emphasis On Methicillin Resistance, Stephanie Kolar
USF Tampa Graduate Theses and Dissertations
The Staphylococci are gram-positive bacteria that cause infections in humans and can produce severe morbidity and mortality. Methicillin resistant S. aureus (MRSA) isolates are resistant to all beta-lactam antibiotics, such as methicillin, and cephalosporins making treatment of these infections more difficult. MRSA has become prevalent throughout the United States, spreading in the health care setting and the community.The purpose of this study is to examine methicillin resistance among S. aureus isolates in an outpatient population in the state of Florida and asses possible associations between methicillin resistance and age group, gender, and geographic area. It is important to define methicillin …
Control Of Lysogeny In Marine Bacteria: Studies With Φhsic And Natural Populations, Amy K. Long
Control Of Lysogeny In Marine Bacteria: Studies With Φhsic And Natural Populations, Amy K. Long
USF Tampa Graduate Theses and Dissertations
Viruses have an estimated global population size of 10 to the 31st, with a significant proportion found in the marine environment. Viral lysis of bacteria affects the flow of carbon in the marine microbial food web, but the effects of lysogeny on marine microbial ecology are largely unknown. In this thesis, factors that influence the control of lysogeny were studied in both the phiHSIC/Listonella pelagia phage-host system and in bacterioplankton populations in the Gulf of Mexico. Using macroarrays dotted with phiHSIC amplicons, viral gene expression over the course of a synchronous infection experiment was measured. Early, middle, late, and continually …
Gender Differences During Heat Strain At Critical Wbgt, Christina L. Luecke
Gender Differences During Heat Strain At Critical Wbgt, Christina L. Luecke
USF Tampa Graduate Theses and Dissertations
Heat stress is influenced by environmental conditions, workload and clothing. A critical environment is the upper limit of compensable heat stress for a given metabolic rate and clothing ensemble. The physiological strains associated with heat stress are core and skin temperatures, heart rate and physiological strain index (PSI). Because heat dissipation mechanisms may differ between men and women, there may be gender differences in the critical environment and the associated physiological variables. Gender differences were explored between acclimated men (n = 20) and women (n = 9) at the upper limit of compensable heat stress. Participants walked on a motorized …
Virginia Woolf And The Persistent Question Of Class: The Protean Nature Of Class And Self, Mary C. Madden
Virginia Woolf And The Persistent Question Of Class: The Protean Nature Of Class And Self, Mary C. Madden
USF Tampa Graduate Theses and Dissertations
From the beginning of her career, Virginia Woolf moves beyond the perspective of her inherited class position to challenge a damaging class system. She increasingly recognizes the extent of her own complicity in the creation and maintenance of class structures supporting patriarchy, war, and British imperialism. Highlighting ambiguities inherent in the very category of class, she acknowledges the limiting "boxes" of language itself in attempts to rethink class. For Woolf, class is not monolithic but internally differentiated by gender and race. Examining Woolf's early work in relation to class theory shows that throughout her career Woolf interrogates the imbrication of …
Investigation Of The Effects Of Increased Levels Of O-Glcnac Protein Modification On Protein Kinase C And Akt, Jason Aaron Matthews
Investigation Of The Effects Of Increased Levels Of O-Glcnac Protein Modification On Protein Kinase C And Akt, Jason Aaron Matthews
USF Tampa Graduate Theses and Dissertations
O-linked N-acetylglucosamine (O-GlcNAc) is an abundant and ubiquitous post-translational modification that has been shown to play a role in regulating a variety of intracellular processes. The pathway responsible for generating the O-GlcNAc modification, the hexosamine biosynthetic pathway (HBP), has also been shown to affect the activity and translocation of certain protein kinase C (PKC) isoforms. To investigate if the effects of HBP flux on PKC translocation observed by others is related to the O-GlcNAc modification, O-GlcNAc levels in human astroglial cells were elevated using four separate O-GlcNAc modulating agents followed by analysis of cytosol and membrane concentrations of PKC-epsilon, -alpha, …
Study Of The Ethical Values Of College Students, Victor Mercader
Study Of The Ethical Values Of College Students, Victor Mercader
USF Tampa Graduate Theses and Dissertations
This study focuses on five main purposes, all of them interrelated and each focused on ethical values, virtues, or character values. The five purposes are: a) Investigate college students' perceptions of ethical values, including their importance, application, usefulness, origin, benefits, need for education, and courses proposed to be included in the curricula; b) Review literature in areas related to ethical values, virtues or character values of college students; c) Develop and pilot an instrument to assess the ethical values of college students; d) Improve and use the developed instrument to describe the status of college students' ethical values; and e) …
Evaluation Of Aashto Design Specifications For Cast-In-Place Continuous Bridge Deck Using Remote Sensing Technique, Ebrahim Mehranipornejad
Evaluation Of Aashto Design Specifications For Cast-In-Place Continuous Bridge Deck Using Remote Sensing Technique, Ebrahim Mehranipornejad
USF Tampa Graduate Theses and Dissertations
This research project concerns the construction, testing, and remote health monitoring of the first smart bridge structure in Florida, the East Bay bridge in Gibsonton, Hillsborough County. The East Bay Bridge is a four span, continuous, deck-type structure with a total length of 120' and width of 55'. The superstructure consists of an 18'' cast-in-place reinforced concrete slab, and is supported on pre-stressed pile bents, each consisting of 5 piles. The smart sensors used for remote health monitoring are the newly emerged Fabry --Perot (FP) Fiber Optic Sensors, and are both surface-mounted and embedded in the concrete deck.Static and Dynamic …
Altered Features Of Female Pigeons (Columba Livia) Elicit Preference Behavior In Male Pigeons, Tadd B. Patton
Altered Features Of Female Pigeons (Columba Livia) Elicit Preference Behavior In Male Pigeons, Tadd B. Patton
USF Tampa Graduate Theses and Dissertations
Previous research has shown that male pigeons (Columba livia) respond with courtship displays to video playbacks of a female pigeon indicating that they 'recognize' the female as a potential mate. Courtship displays significantly decline when the head region of the female is occluded (Shimizu, 1998) suggesting that features located within the head are important for species recognition and mate selection. However, little is known about the exact visual features necessary to elicit displays. The current study examined the preference behavior of male pigeons when given a choice between photographic images of normal looking or altered female pigeon faces. The altered-face …
Clarifying The Cohesion-Performance Relationship In Teams: Backup Behavior As A Mediating Mechanism, Matthew S. Prewett
Clarifying The Cohesion-Performance Relationship In Teams: Backup Behavior As A Mediating Mechanism, Matthew S. Prewett
USF Tampa Graduate Theses and Dissertations
The relationship between team cohesion and team performance has been extensively studied, but behavioral mediators of this relationship have not been adequately assessed. This study proposed that backup behavior mediates the relationship between team cohesion and team performance. In addition, it was also hypothesized that team goal commitment would moderate the relationship between team cohesion and team backup behavior. 138 participants forming 46 teams of three were assigned to one of fours conditions to test this framework: high cohesion/high goal commitment, high cohesion/low goal commitment, low cohesion/high goal commitment, and low cohesion/low goal commitment. Results indicated no significant differences between …
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 …
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 …
Advancements In Rapid Load Test Data Regression, Michael Jeffrey Stokes
Advancements In Rapid Load Test Data Regression, Michael Jeffrey Stokes
USF Tampa Graduate Theses and Dissertations
Rate-dependent effects introduced during rapid and/or dynamic events have typically been oversimplified to compensate for deficiencies in present analyses. As load test results are generally considered as the basis of performance from which foundations can be designed, it is imperative that the analyzed load test data be as accurate as possible. In an attempt to progress the state of load test data regression, this dissertation addresses two common assumptions made during the regression process: (1) the statnamic damping coefficient is constant throughout the entire load test and (2) the concrete stress-strain relationship is linear-elastic. Also presented is a case study …
8-Isoprostane Levels In Exhaled Breath Condensate Of Pregnant Women Compared To Non-Pregnant Women; Is There A Baseline Difference?, Rosemary Szollas
8-Isoprostane Levels In Exhaled Breath Condensate Of Pregnant Women Compared To Non-Pregnant Women; Is There A Baseline Difference?, Rosemary Szollas
USF Tampa Graduate Theses and Dissertations
This study investigated whether or not there was an overall difference in the pulmonary oxidative marker, 8-isoprostane (PGF2-a), found in exhaled breath condensate, during pregnancy versus the non-pregnant state. The utility of this information was important secondary to the effect of maternal asthma on pregnancy and outcome, as it has been demonstrated in past studies that overall pregnant females with asthma have been shown to have an increased risk of exacerbation requiring medical intervention.The primary goal of this study sought to determine if there is a difference in PGF2a levels in the exhaled breath condensate of pregnant versus non-pregnant females. …
Underwater Frp Repair Of Corrosion Damaged Prestressed Piles, Kwangsuk Suh
Underwater Frp Repair Of Corrosion Damaged Prestressed Piles, Kwangsuk Suh
USF Tampa Graduate Theses and Dissertations
The goal of the dissertation was to quantify the role of FRP in repairing corroded prestressed piles in a marine environment and to demonstrate the feasibility of using it for field repairs. Three laboratory studies and two field demonstration projects were undertaken to meet this goal.In the first study, corroded specimens were repaired under water and tests conducted to determine the extent of strength retained immediately after wrapping and after further accelerated corrosion. Results showed that the underwater wrap was effective in restoring and maintaining lost capacity in both situations.The second study attempted to determine the effectiveness of FRP for …
An Examination Of The Interaction Between Exemplary Teachers And Struggling Writers, Betty Ruth Sylvester
An Examination Of The Interaction Between Exemplary Teachers And Struggling Writers, Betty Ruth Sylvester
USF Tampa Graduate Theses and Dissertations
This study examined the interactions between teachers of writing and struggling writers. There were two main research questions: (1) What is the nature of the interaction between exemplary teachers of writing and struggling writers? (2) What arethe responses of struggling writers to exemplary teachers' scaffolding? To answer these questions, qualitative analysis was conducted on data. Two struggling writers were selected for the study based on their responses to the Writers Self-Perception Scale,writing samples, and teacher recommendation. Data collection included observation in two separate fourth grade classrooms during the writing block for 30 days. Data sources included audio-recording of writing instruction …
A Descriptive Study Of Students’ Perspectives On Controversial Issues Embedded In A College Environmental Science Course, Chyrisse P. Tabone
A Descriptive Study Of Students’ Perspectives On Controversial Issues Embedded In A College Environmental Science Course, Chyrisse P. Tabone
USF Tampa Graduate Theses and Dissertations
This qualitative study described non-science undergraduate majors' responses to controversial issues embedded in an introductory level environmental science course in a liberal arts college located in the southeastern United States. Participants enrolled in this 12-week summer course were both traditional college-age (late teens to early twenties) and non-traditional age student (thirties to fifties). Approximately 76 percent were female. Students demonstrated various lifestyles (e.g., gay, single-parent, living at home), socioeconomic statuses (e.g., middle-income, low income), employment (e.g., employed, unemployed, ex-military) and ethnicities. The structure of the environmental science course was consistent with the science education reform movement standards applied to K-12 …
Factors Influencing Special Educators’ Perspectives Regarding The Reintegration Of Special Education Students, Brandi L. Tanner
Factors Influencing Special Educators’ Perspectives Regarding The Reintegration Of Special Education Students, Brandi L. Tanner
USF Tampa Graduate Theses and Dissertations
The purpose of this investigation was to obtain information about special educators' perceptions of the reintegration of special education students into general education classrooms and factors affecting their reintegration decisions. Reintegration is the process of determining when it is appropriate to fade and eventually remove special education services for a student. Special educators often are in a good position to both initiate and facilitate this process. The current study surveyed special educators. Participants read vignettes depicting special education students with mild disabilities and answered a set of survey questions regarding their perceptions about reintegrating the students into the general education …
“This Is Not A Politburo, But A Madhouse,” The Post World War Ii Sovietization Of East Germany Up To The 1953 Worker’S Uprising, Rush H. Taylor
“This Is Not A Politburo, But A Madhouse,” The Post World War Ii Sovietization Of East Germany Up To The 1953 Worker’S Uprising, Rush H. Taylor
USF Tampa Graduate Theses and Dissertations
The end of World War II brought forth many problems for the allies that had not been completely resolved by the victors. One of the most important was what to do with the defeated Germany. Within the first decade after World War II, the division of the former German superpower had become the front line of the Cold War between the United States and the Soviet Union. In the first eight years after the war (1945-53) East Germany, the Soviet controlled sector, quickly became 'Stalin's unwanted child' and was the first communist country to rebel against the imposed Soviet style …
Design And Synthesis Of Core Structural Intermediates For Novel Hiv-1 Protease Inhibitors & Synthesis, Biological Activity And Molecular Modeling Of Novel 20s Proteasome Inhibitors, Kiran Kumar Venkata Raja Avancha
Design And Synthesis Of Core Structural Intermediates For Novel Hiv-1 Protease Inhibitors & Synthesis, Biological Activity And Molecular Modeling Of Novel 20s Proteasome Inhibitors, Kiran Kumar Venkata Raja Avancha
USF Tampa Graduate Theses and Dissertations
HIV-1 protease binds to its peptide/protein substrates in extended conformations. Therefore protease inhibitors that are constrained to form extended conformations are likely to produce very active protease inhibitors. This is because they are pre-organized to form favorable interactions with the enzyme environment immediately surrounding the active site. With this hypothesis in mind, we designed a family of structurally related molecules, which contain dipeptide analogs constrained to adopt the extended conformation. Core structural intermediates that are required for the total synthesis of the novel class of HIV-1 protease inhibitors are outlined in Chapter One. Chapter Two discusses the enantioselective synthesis of …