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Articles 3271 - 3300 of 5006
Full-Text Articles in Arts and Humanities
Effect Of Temperature On Copper Chemical Mechanical Planarization, Veera Raghava R Kakireddy
Effect Of Temperature On Copper Chemical Mechanical Planarization, Veera Raghava R Kakireddy
USF Tampa Graduate Theses and Dissertations
The effects of different process parameters on tribology and surface defects were studied till date, but there has been a very minimal study to understand the effect of slurry temperature during Copper Chemical Mechanical Polishing (CMP). The surface defects such as dishing, erosion and metal loss amount for more than 50% of the defects that hamper the device yield and mainly the electrical properties during the manufacturing process. In this research, the effect of slurry temperature on tribology, surface defects and electrical properties during copper CMP employing different pad materials and slurries has been explored. Experiments were conducted at different …
Micro Coaxial Transmission Lines For Integrated Microwave Circuits, Saravana Prakash Natarajan
Micro Coaxial Transmission Lines For Integrated Microwave Circuits, Saravana Prakash Natarajan
USF Tampa Graduate Theses and Dissertations
The research presented in this doctoral dissertation introduces a developmental path to realize micro coaxial transmission lines for wafer-level microwave and millimeter wave circuits. The micro coax lines conceptualized in this research are three-dimensional, with a uniquely low vertical profile of 20 mu m. They are distinguishable from other transmission line topologies due to frequency limitless, cross-talk free performance in high density circuits resulting from the totally shielded construction. Design and optimization was done using equations and electromagnetic simulations. Extensive process development has been carried out to fabricate these devices on CMOS grade silicon wafers using processes amenable to the …
Measurement And Modeling Of The Anhysteretic Magnetization Of Magnetic Cores For Temperature And Frequency Dependent Effects, Jeremy M. Walker
Measurement And Modeling Of The Anhysteretic Magnetization Of Magnetic Cores For Temperature And Frequency Dependent Effects, Jeremy M. Walker
USF Tampa Graduate Theses and Dissertations
Inductors and transformers are electrical devices critical to power conversion systems. The current-voltage (I-V) behavior of these devices is very nonlinear as a result of the magnetic cores used in their construction. However, in the design of these power conversion systems the present state of Spice-based models is limited to low frequency and room temperature effects. An addition to the present model found in many Spice type environments, Jiles-Atherton, is the subject of this work. Chapter 1 of this dissertation introduces the source of these nonlinearities as being a result of the relationship between the magnetic flux density, B, and …
Analysis Of Vtol Mav Use During Rescue And Recovery Operations Following Hurricane Katrina, Kevin S. Pratt
Analysis Of Vtol Mav Use During Rescue And Recovery Operations Following Hurricane Katrina, Kevin S. Pratt
USF Tampa Graduate Theses and Dissertations
There can be little doubt that Hurricane Katrina will always be remembered for the damage and devastation it caused. But it also provided the first opportunity for MAVs to be used and evaluated during Search and Rescue (SAR) as well as recovery operations. Researchers from The Center for Robot-Assisted Search And Rescue (CRASAR) made two separate deployments to areas affected by Hurricane Katrina: one during initial SAR operations and a second deployment during recovery operations 90 days later. Using data and observations from both of these deployments, this work draws four key findings about semi-autonomous Miniature UAV (MAV) operations in …
Ultra-Wideband Electronics, Design Methods, Algorithms, And Systems For Dielectric Spectroscopy Of Isolated B16 Tumor Cells In Liquid Medium, Erick N. Maxwell
Ultra-Wideband Electronics, Design Methods, Algorithms, And Systems For Dielectric Spectroscopy Of Isolated B16 Tumor Cells In Liquid Medium, Erick N. Maxwell
USF Tampa Graduate Theses and Dissertations
Quantifying and characterizing isolated tumor cells (ITCs) is of interest in surgical pathology and cytology for its potential to provide data for cancer staging, classification, and treatment. Although the independent prognostic significance of circulating ITCs has not been proven, their presence is gaining clinical relevance as an indicator. However, researchers have not established an optimal method for detecting ITCs. Consequently, this Ph.D. dissertation is concerned with the development and evaluation of dielectric spectroscopy as a low-cost method for cell characterization and quantification. In support of this goal, ultra-wideband (UWB), microwave pulse generator circuits, coaxial transmission line fixtures, permittivity extraction algorithms, …
Design And Evaluation Of New Search Paradigms And Power Management For Peer-To-Peer File Sharing, Graciela Perera
Design And Evaluation Of New Search Paradigms And Power Management For Peer-To-Peer File Sharing, Graciela Perera
USF Tampa Graduate Theses and Dissertations
Current estimates are that more than nine million PCs in the U.S. are part of peer-to-peer (P2P) file sharing overlay networks on the Internet. These P2P hosts generate about 20% of the traffic on the Internet and consume about 7.8 TWh/yr equal to $630 million per year. File search in a P2P network is based on a wasteful paradigm of broadcasting query messages. Reducing P2P overhead traffic to reduce bandwidth waste and enabling power management to reduce electricity usage are clearly of great interest. In this dissertation, two new search paradigms with reduced overhead traffic are investigated. The new Targeted …
Scalable Frameworks And Algorithms For Cluster Ensembles And Clustering Data Streams, Prodip Hore
Scalable Frameworks And Algorithms For Cluster Ensembles And Clustering Data Streams, Prodip Hore
USF Tampa Graduate Theses and Dissertations
Clustering algorithms are an important tool for data mining and data analysis purposes. Clustering algorithms fall under the category of unsupervised learning algorithms, which can group patterns without an external teacher or labels using some kind of similarity metric. Clustering algorithms are generally iterative in nature and computationally intensive. They will have disk accesses in every iteration for data sets larger than memory, making the algorithms unacceptably slow. Data could be processed in chunks, which fit into memory, to provide a scalable framework. Multiple processors may be used to process chunks in parallel. Clustering solutions from each chunk together form …
Error Equivalence Theory For Manufacturing Process Control, Hui Wang
Error Equivalence Theory For Manufacturing Process Control, Hui Wang
USF Tampa Graduate Theses and Dissertations
Due to uncertainty in manufacturing processes, applied probability and statistics have been widely applied for quality and productivity improvement. In spite of significant achievements made in causality modeling for control of process variations, there exists a lack of understanding on error equivalence phenomenon, which concerns the mechanism that different error sources result in identical variation patterns on part features. This so called error equivalence phenomenon could have dual effects on dimensional control: significantly increasing the complexity of root cause identification, and providing an opportunity to use one error source to counteract or compensate the others. Most of previous research has …
Investigation Of The Rectenna Concept For Millimeter Wave Applications, Henrry La Rosa
Investigation Of The Rectenna Concept For Millimeter Wave Applications, Henrry La Rosa
USF Tampa Graduate Theses and Dissertations
This thesis presents the rectifying antenna potential for infrared and millimeter wave energy conversion. Infrared imaging is one of the emerging technologies that have attracted considerable attention in the next generation of military, medical, and commercial applications. Moreover, with the ever-increasing congestion of the electromagnetic spectrum at RF and microwave frequencies and the establishment of firm civilian and military requirements best met by millimeter wave systems, the interest in the technology has grown and is now firmly established. During this work a 2.5GHz slot antenna, a 2.5GHz Schottky diode detector, a CPW-to-Microstrip transition, a fully integrated Rectenna element, and a …
Probabilistic Modeling Of Quantum-Dot Cellular Automata, Saket Srivastava
Probabilistic Modeling Of Quantum-Dot Cellular Automata, Saket Srivastava
USF Tampa Graduate Theses and Dissertations
As CMOS scaling faces a technological barrier in the near future, novel design paradigms are being proposed to keep up with the ever growing need for computation power and speed. Most of these novel technologies have device sizes comparable to atomic and molecular scales. At these levels the quantum mechanical effects play a dominant role in device performance, thus inducing uncertainty. The wave nature of particle matter and the uncertainty associated with device operation make a case for probabilistic modeling of the device. As the dimensions go down to a molecular scale, functioning of a nano-device will be governed primarily …
Computer Simulation Of Stand-Off Libs And Raman Lidar For Remote Sensing Of Distant Compounds, Dzianis Pliutau
Computer Simulation Of Stand-Off Libs And Raman Lidar For Remote Sensing Of Distant Compounds, Dzianis Pliutau
USF Tampa Graduate Theses and Dissertations
Long range stand-off Raman and Laser-Induced Breakdown Spectroscopy (LIBS) lidar signal simulations have been carried out using a modified UV-visible atmospheric transmission program and a modified lidar equation. The Hitran-PC atmospheric transmission program which normally operates over the wavelength range of 400 nm to the far-IR was modified to provide UV atmospheric attenuation (200 nm -- 400 nm) using the optical cross section data contained in the HITRAN database. The two-way lidar equation was modified in order to simulate the one-way propagation of the Raman and LIBS spectral, and thus provide calculations of the expected Raman or LIBS signal as …
The Art Of Existentialism: F. Scott Fitzgerald, Ernest Hemingway, Norman Mailer And The American Existential Tradition, J'Aimã© L. Sanders
The Art Of Existentialism: F. Scott Fitzgerald, Ernest Hemingway, Norman Mailer And The American Existential Tradition, J'Aimã© L. Sanders
USF Tampa Graduate Theses and Dissertations
The purpose of my research is to examine the philosophic influences on three literary works: F. Scott Fitzgerald's The Great Gatsby, Ernest Hemingway's Death in the Afternoon, and Norman Mailer's An American Dream. Through an investigation of biographical, historical, cultural, and textual evidence, I will argue for the influence of several European philosophers---Friedrich Nietzsche, Søren Kierkegaard, and Martin Heidegger---on these authors and on the structures and messages of their works. I will discuss how the specific works I have selected not only reveal each author's apt understanding of the existential-philosophical crises facing the individual in the twentieth century, but also …
Pricing Models And Analysis Of Corporate Coupon-Bonds And Credit Default Swaptions, Michiru Shibata
Pricing Models And Analysis Of Corporate Coupon-Bonds And Credit Default Swaptions, Michiru Shibata
USF Tampa Graduate Theses and Dissertations
In this work, pricing models of corporate coupon-bonds and credit default swaptions are derivedand analyzed. Corporate coupon-bonds are priced incorporating both intensity models and structural models, and also jumps introduced by seasonal effects. In deriving the models, we form portfolios to hedge the risk incurred by the instruments, then derive PDE equations using the arbitrage principle and the Ito Lemma for jump processes. The mathematical models are the parabolic-type PDE equations with terminal conditions and boundary conditions. These PDE problems are analyzed and solved by various transformations and incorporation with probabilistic properties. Either a unique solution in the exponential form …
Construct Validity Of Situational Judgment Tests: An Examination Of The Effects Of Agreeableness, Organizational Leadership Culture, And Experience On Sjt Responses, Jonathan Adam Shoemaker
Construct Validity Of Situational Judgment Tests: An Examination Of The Effects Of Agreeableness, Organizational Leadership Culture, And Experience On Sjt Responses, Jonathan Adam Shoemaker
USF Tampa Graduate Theses and Dissertations
Numerous factors are likely to influence response patterns to situational judgment tests, including agreeableness, leadership style, impression management, and job and organizational experience. This research presents background information and research on situational judgment tests and several constructs hypothesized to influence situational judgment test responses. A situational judgment test and manipulations to influence response patterns were developed and piloted with a small sample of management professionals and undergraduate students. Larger samples of management professionals and undergraduate students participated in the experimental research. Participants were asked to imagine that they are applying for a job. Each participant was presented with background information …
How Do Proficient Intermediate Grade Writers Percieve Writing In School?, Tammy Weiss Schimmel
How Do Proficient Intermediate Grade Writers Percieve Writing In School?, Tammy Weiss Schimmel
USF Tampa Graduate Theses and Dissertations
The purpose of this study was to examine students' perspectives of writing instruction to gain insights into their awareness of the impact of high-stakes writing assessments on instructional practices and teaching strategies. Students in grades four and five who attended the 2004 Suncoast Young Author's Celebration (SYAC) served as the sample for this study. Data were gathered through surveys and interviews with 20 students who attended the SYAC. Survey questions were used to obtain general information about the students' perceptions of writing instruction and assessment. Interviews were conducted to gain a richer understanding of their perceptions of classroom experiences.The participants …
Src Kinase Inhibitors For The Treatment Of Sarcomas: Cellular And Molecular Mechanisms Of Action, Audrey Cathryn Shor
Src Kinase Inhibitors For The Treatment Of Sarcomas: Cellular And Molecular Mechanisms Of Action, Audrey Cathryn Shor
USF Tampa Graduate Theses and Dissertations
Sarcomas are rare mesenchymally-derived tumors with limited treatment options. Tyrosine kinases may serve as potential targets for sarcoma therapy because many are mutated or overexpressed in sarcomas and cell lines. One potential molecular target for sarcoma treatment is the Src tyrosine kinase. Three independently synthesized Src kinase inhibitors were evaluated in human sarcoma cell lines. Of the three, dasatinib, provided promising results as a potential sarcoma therapy. Until this study, dasatinib activity had not been characterized in sarcoma cells. Based on our previous findings of Src activation in human sarcomas, we evaluated the effects of dasatinib in twelve sarcoma cell …
"A Woman's Face, Or Worse": Otto Rank And The Modernist Identity, Michael L. Shuman
"A Woman's Face, Or Worse": Otto Rank And The Modernist Identity, Michael L. Shuman
USF Tampa Graduate Theses and Dissertations
Otto Rank is a significant but generally overlooked figure in the early history of psychoanalysis, and his work provides an illuminating context for the study of subjectivity and modernist culture. The "modernist identity" of my title is intended to represent, first, the concept of the individual self identified and expressed during this period and, secondly, the unique identity of modernist culture developed by artists through creative acts and emanating as the intellectual ambiance of the era. Through an examination of Rank's later theories and the work of prominent modernist artists, including Lawrence, Yeats, and Eliot, this dissertation will show that …
Psychometric Functions Of Clear And Conversational Speech For Young Normal Hearing Listeners In Noise, Jane Smart
Psychometric Functions Of Clear And Conversational Speech For Young Normal Hearing Listeners In Noise, Jane Smart
USF Tampa Graduate Theses and Dissertations
Clear speech is a form of communication that talkers naturally use when speaking in difficult listening conditions or with a person who has a hearing loss. Clear speech, on average, provides listeners with hearing impairments an intelligibility benefit of 17 percentage points (Picheny, Durlach, & Braida, 1985) over conversational speech. In addition, it provides increased intelligibility in various listening conditions (Krause & Braida, 2003, among others), with different stimuli (Bradlow & Bent, 2002; Gagne, Rochette, & Charest, 2002; Helfer, 1997, among others) and across listener populations (Bradlow, Kraus, & Hayes, 2003, among others). Recently, researchers have attempted to compare their …
An Experimental Analysis Of Activist Message Strategy Effect On Receiver Variables, Andrea Schuch
An Experimental Analysis Of Activist Message Strategy Effect On Receiver Variables, Andrea Schuch
USF Tampa Graduate Theses and Dissertations
Utilizing communication and activist organization perspectives, this empirical study examined activist message strategies and how they influence variables related to the receiver of activist communication. Specifically, J.E. Grunig's (1997) situational theory of publics and Fishbein and Ajzen's (1975) theory of reasoned action were used to explain the communication effects of the seven activist message strategies developed from Hazleton and Long's (1988) public relations process model. The findings of this study support the premise of situational theory of publics and contribute to the extension of the theory through the inclusion of goal compatibility as a predictor of information seeking behavior and …
The Impact Of Management’S Tone On The Perception Of Management’S Credibility In Forecasting, Robert D. Slater
The Impact Of Management’S Tone On The Perception Of Management’S Credibility In Forecasting, Robert D. Slater
USF Tampa Graduate Theses and Dissertations
The purpose of this study is to examine the impact of management altering its tone in communications on participants' perceptions of management credibility. Management's tone in communicating with participants was manipulated using communications from management under two treatment conditions. In period one of the study management's tone was manipulated within the management statement on internal controls as required by the Public Company Accounting Oversight Board's (PCAOB) Auditing Standards No. 2. In period one, participants had no knowledge of management's prior forecasting accuracy. Consistent with predicted hypotheses, the findings reveal that management can increase its credibility with participants by communicating its …
Vadose Zone Processes Affecting Water Fluctuations: Conceptualization And Modeling Considerations, Nirjhar Shah
Vadose Zone Processes Affecting Water Fluctuations: Conceptualization And Modeling Considerations, Nirjhar Shah
USF Tampa Graduate Theses and Dissertations
This dissertation focuses on a variety of vadose zone processes that impact water table fluctuations. The development of vadose zone process conceptualization has been limited due to both the lack of recognition of the importance of the vadose zone and the absence of suitable field data. Recent studies have, however, shown that vadose zone soil moisture dynamics, especially in shallow water table environments, can have a significant effect on processes such as infiltration, recharge to the water table, and evapotranspiration. This dissertation, hence, attempts to elucidate approaches for modeling vadose zone soil moisture dynamics. The ultimate objective is to predict …
Methods To Improve Bond On Frp Wrapped Piles, Andy Schrader
Methods To Improve Bond On Frp Wrapped Piles, Andy Schrader
USF Tampa Graduate Theses and Dissertations
Fiber Reinforced Polymer (FRP) sheets can provide incredible structural strength while weighing only a fraction as much as steel. When applied to piles the FRP provides strengthening through both concrete confinement and tensile reinforcement. Mainly used in structural repair, its application is relatively simple in theory. However, many factors(some avoidable, some not) can interfere with the bond between FRP and concrete. When this bond is interrupted the strength of the repair becomes compromised.This thesis examines 2 new methods of improving FRP bond to concrete piles during the time the resin is curing. These methods are compared using 3 types of …
Crystal Engineering Of Co-Crystals And Their Relevance To Pharmaceutical Forms, Tanise R. Shattock
Crystal Engineering Of Co-Crystals And Their Relevance To Pharmaceutical Forms, Tanise R. Shattock
USF Tampa Graduate Theses and Dissertations
The research presented herein focus upon crystal engineering of co-crystals with an emphasis upon the exploration of co-crystals in the context of delineation of the reliability of hydrogen bonded supramolecular synthons and their hierarchies. The approach involves a combination of systematic Cambridge Structural Database analysis and a series of model co-crystal experiments. In addition, the viability of solid state methodologies toward supramolecular synthesis of co-crystals and the effect on polymorphism is also addressed. The application of the acquired knowledge is towards the crystal engineering of pharmaceutical co-crystals. The rational design and synthesis of pharmaceutical co-crystals accomplished by the selection of …
The Proteoglycan Perlecan Regulates Long Bone Growth Through Interactions With Developmental Proteins In The Growth Plate, Simone Marsha-Lee Smith
The Proteoglycan Perlecan Regulates Long Bone Growth Through Interactions With Developmental Proteins In The Growth Plate, Simone Marsha-Lee Smith
USF Tampa Graduate Theses and Dissertations
Perlecan is the major heparan sulfate proteoglycan (HSPG) in growth plate cartilage and is critical for growth plate chondrocyte proliferation and proper skeletal development. Its core protein and attached chondroitin sulfate (CS) and heparan sulfate (HS) chains mediate interactions with many diverse proteins. Fibroblast growth factor (FGF)-2 and FGF-18 are other regulators of chondrocyte proliferation in the growth plate. Additionally, FGF-18 controls the hypertrophy and cartilage vascularization necessary for endochondral ossification. The research presented in this dissertation aimed to identify known and novel perlecan-binding proteins that are endogenous to the growth plate and to characterize their interactions with perlecan. FGF-2 …
Reconstructing The Past: Heritage Research And Preservation Activities In Tampa Bay Communities, Courtney Ross Spillane
Reconstructing The Past: Heritage Research And Preservation Activities In Tampa Bay Communities, Courtney Ross Spillane
USF Tampa Graduate Theses and Dissertations
There are numerous ways in which cultural heritage can be preserved, such as: physical museums, virtual museums, tours of historic homes, and community meetings. For this project, I participated in and observed heritage preservation activities in two very different communities--- Sulphur Springs and Seminole Heights in Tampa, Florida. My internship appointment was with OSHNA (Old Seminole Heights Neighborhood Association) under the direction of Dr. Steve Gluckman. My primary focus was assisting heritage preservation committee members in each of the two communities with heritage preservation projects specific to their community needs and interests. One project is the development of a heritage …
A Theoretical Model For Self-Assembly Of Flexible Tiles, Ana Staninska
A Theoretical Model For Self-Assembly Of Flexible Tiles, Ana Staninska
USF Tampa Graduate Theses and Dissertations
We analyze a self-assembly model of flexible DNA tiles and develop a theoretical description of possible assembly products. The model is based on flexible branched DNA junction molecules, which are designed in laboratories and could serve for performing computation. They are also building blocks for make of even more complex molecules or structures. The branched junction molecules are flexible with sticky ends on their arms. They are modeled with "tiles", which are star like graphs, and "tile types", which are functions that give information about the number of sticky ends. A complex is a structure that is obtained by gluing …
Scissors Paper Rock, Barbara St. Clair
Scissors Paper Rock, Barbara St. Clair
USF Tampa Graduate Theses and Dissertations
Scissors Paper Rock is based on the true story of Amy Biel, a young and idealistic American woman who went to South Africa to support the political effort against Apartheid. She worked there as a volunteer organizer during a time of great political turmoil, and was days away from returning home to the United States, when she was violently killed in a riot. While Amy's death was not an accident--four men were found guilty for taking her life--it is certainly possible to think of her death as a tragedy. Amy's idealism and belief in her power to do good, allowed …
Teachers’ Use Of Sensory Activities In Primary Literacy Lessons: A Study Of Teachers Trained In Accelerated Literacy Learning, Margaret E. Stockdale
Teachers’ Use Of Sensory Activities In Primary Literacy Lessons: A Study Of Teachers Trained In Accelerated Literacy Learning, Margaret E. Stockdale
USF Tampa Graduate Theses and Dissertations
This study investigated Accelerated Literacy Learning (ALL) trained teachers' implementation of sensory activities into their classroom instructional practice. There were 38 participants in Phase One that completed questionnaires using a 5-point response scale to indicate their frequency of use for each of 30 sensory activities. All but one participant reported a high use of sensory activities in their literacy lessons, although the grade level did influence the variety and frequency of their reported use. Most primary level teachers reported a high use on many of the activities. Seven teachers of the participants from Phase One participated in interviews for Phase …
Assessing The Reproducibility Of Skeletal Geochemistry Records In Atlantic Corals Using Montastraea Annularis Coral Heads From The Dry Tortugas, Florida, Kristine L. Stair
Assessing The Reproducibility Of Skeletal Geochemistry Records In Atlantic Corals Using Montastraea Annularis Coral Heads From The Dry Tortugas, Florida, Kristine L. Stair
USF Tampa Graduate Theses and Dissertations
Core samples were collected in September 1995 from live coral heads of Montastraea annularis at Bird Key reef in the Dry Tortugas, Florida (24 degrees 55 minutes N, 82 degrees 92 minutes W). Four 4 mm-thick coral slabs from two cores were continuously sampled at 12 samples per year (0.025 cm per sample for Core 31, 0.023 cm per sample for Core 35). Visual inspection of X-radiographs indicates an average skeletal extension rate of about 3 mm per year in Bird Key corals. The goal of this study was to perform a replication test in Montastraea annularis by using elemental …
Cellular Electrofusion Utilizing Corona Fields And Dc Pulse Technology, Joshua Stein
Cellular Electrofusion Utilizing Corona Fields And Dc Pulse Technology, Joshua Stein
USF Tampa Graduate Theses and Dissertations
Cell fusion is an important technique that is used in the field of medicine and biomedical research. For instance, fusion can be used to create hybridomas and novel types of secretory hybrid cells. It may also be used to engineer cultured insulin-secreting pancreatic B-cell lines for the treatment of diabetes. Historically, the applications listed above have been accomplished by a number of methodologies including dielectrophoresis, centrifugation, polyethylene glycol (PEG) and viral fusion proteins. However, these approaches often fail to produce the desired results due to poor cell viability, lack of 1:1 fusion, and use of non-physiological environments. It is proposed …