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Simd Algorithms For Single Link And Complete Link Pattern Clustering, Shankar Arumugavelu
Simd Algorithms For Single Link And Complete Link Pattern Clustering, Shankar Arumugavelu
USF Tampa Graduate Theses and Dissertations
Clustering techniques play an important role in exploratory pattern analysis, unsupervised pattern recognition and image segmentation applications. Clustering algorithms are computationally intensive in nature. This thesis proposes new parallel algorithms for Single Link and Complete Link hierarchical clustering. The parallel algorithms have been mapped on a SIMD machine model with a linear interconnection network. The model consists of a linear array of N (number of patterns to be clustered) processing elements (PEs), interfaced to a host machine and the interconnection network provides inter-PE and PE-to-host/host-to-PE communication. For single link clustering, each PE maintains a sorted list of its first logN …
Channel, Spectrum, And Waveform Awareness In Ofdm-Based Cognitive Radio Systems, Tevfik Yücek
Channel, Spectrum, And Waveform Awareness In Ofdm-Based Cognitive Radio Systems, Tevfik Yücek
USF Tampa Graduate Theses and Dissertations
The radio spectrum is becoming increasingly congested everyday with emerging technologies and with the increasing number of wireless devices. Considering the limited bandwidth availability, accommodating the demand for higher capacity and data rates is a challenging task, requiring innovative technologies that can offer new ways of exploiting the available radio spectrum. Cognitive radio arises to be a tempting solution to the spectral crowding problem by introducing the notion of opportunistic spectrum usage. Because of its attractive features, orthogonal frequency division multiplexing (OFDM) has been successfully used in numerous wireless standards and technologies. We believe that OFDM will play an important …
Sulk Localization And Topology Control In Large Scale Heterogeneous Wireless Sensor Networks, Rui Zhang
Sulk Localization And Topology Control In Large Scale Heterogeneous Wireless Sensor Networks, Rui Zhang
USF Tampa Graduate Theses and Dissertations
Wireless Sensor Networks (WSNs) continue to evolve as new applications emerge. In the recent past, WSNs were mostly single sink networks with a few number of homogeneous and static sensor nodes. Now, several applications require networks with multiple and moving sinks and targets as well as thousands of heterogeneous devices. However, the same constraints remain: sensor nodes continue to be very limited in resources, posing new challenges in the design of scalable and energy-efficient algorithms and communication protocols to support these new applications. This dissertation first addresses the problem of sink localization in large scale WSNs. A scalable and energy-efficient …
Learning From Biometric Distances: Performance And Security Related Issues In Face Recognition Systems, Pranab Mohanty
Learning From Biometric Distances: Performance And Security Related Issues In Face Recognition Systems, Pranab Mohanty
USF Tampa Graduate Theses and Dissertations
We present a theory for constructing linear, black box approximations to face recognition algorithms and empirically demonstrate that a surprisingly diverse set of face recognition approaches can be approximated well using a linear model. The construction of the linear model to a face recognition algorithm involves embedding of a training set of face images constrained by the distances between them, as computed by the face recognition algorithm being approximated. We accomplish this embedding by iterative majorization, initialized by classical multi-dimensional scaling (MDS). We empirically demonstrate the adequacy of the linear model using six face recognition algorithms, spanning both template based …
Implementation Of Unmanned Vehicle Control On Fpga Based Platform Using System Generator, Shashikala Narasimha Murthy
Implementation Of Unmanned Vehicle Control On Fpga Based Platform Using System Generator, Shashikala Narasimha Murthy
USF Tampa Graduate Theses and Dissertations
The goal of this research was to explore a new and improved software development tool for the implementation of control algorithms on Xilinx Field Programmable Gate Arrays (FPGA). The Simulink plug in, System Generator, complements traditional Hardware Description Language (HDL) by providing a higher level graphical language for the development of FPGA designs. The design is then translated into the lower level required by the Xilinx's ISE program. By utilizing this graphical based higher level of abstraction at the design entry level, the requirement of a detailed knowledge of HDL languages is no longer required. Because of this new environment …
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 …
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, …
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 …
Defining Service Quality In An Outpatient Clinic With Complex Constituency, Swati Verma
Defining Service Quality In An Outpatient Clinic With Complex Constituency, Swati Verma
USF Tampa Graduate Theses and Dissertations
The 2001 Institute of Medicine's (I.O.M.) landmark report, Crossing the Quality Chasm: A New Health System for the 21st Century observes that, "[though] medical science and technology have advanced at a rapid pace,...the health care delivery system has floundered in its ability to provide consistently high-quality care" (I.O.M. 2001). The report recommended six quality aims for a twenty-first century health care system; one of them being patient-centered care. It explains patient-centered care as "providing care that is respectful of and responsive to individual patient preferences, needs, and values and ensuring that patient values guide all clinical decisions" (I.O.M. 2001). This …
Barium Strontium Titanate Films For Tunable Microwave And Acoustic Wave Applications, Venkataramanan Gurumurthy
Barium Strontium Titanate Films For Tunable Microwave And Acoustic Wave Applications, Venkataramanan Gurumurthy
USF Tampa Graduate Theses and Dissertations
The composition-dependent Curie temperature and bias-dependant dielectric permittivity of Barium Strontium Titanate (BST) makes it very attractive for tunable application in the RF/Microwave regime. In this research work, the performance of BST varactors fabricated on the conventional Pt/Ti/SiO2/Si bottom electrode stack were compared with those fabricated using chemical vapor deposited Nanocrystalline Diamond (NCD) as the diffusion barrier layer instead of SiO2. The varactors fabricated on NCD films displayed much better symmetry in capacitance-voltage behavior and better overall quality factors than varactors fabricated on SiO2. The improvement in performance can be attributed to existence of stable interfaces in the devices fabricated …
Voice Recognition System Based On Intra-Modal Fusion And Accent Classification, Srikanth Mangayyagari
Voice Recognition System Based On Intra-Modal Fusion And Accent Classification, Srikanth Mangayyagari
USF Tampa Graduate Theses and Dissertations
Speaker or voice recognition is the task of automatically recognizing people from their speech signals. This technique makes it possible to use uttered speech to verify the speaker's identity and control access to secured services. Surveillance, counter-terrorism and homeland security department can collect voice data from telephone conversation without having to access to any other biometric dataset. In this type of scenario it would be beneficial if the confidence level of authentication is high. Other applicable areas include online transactions,database access services, information services, security control for confidential information areas, and remote access to computers. Speaker recognition systems, even though …
Mathematical Techniques For The Estimation Of The Diffusion Coefficient And Elimination Constant Of Agents In Subcutaneous Tissue, Lawrence T. Hersh
Mathematical Techniques For The Estimation Of The Diffusion Coefficient And Elimination Constant Of Agents In Subcutaneous Tissue, Lawrence T. Hersh
USF Tampa Graduate Theses and Dissertations
The purpose of this work was to develop methods to estimate the diffusion coefficient and elimination constant for dexamethasone in subcutaneous tissue. Solutions to the diffusion equation were found for different conditions relevant to implantation and injection. These solutions were then used as models for measured autoradiography data where the unknown model parameters were the diffusion coefficient and the elimination constant. The diffusion coefficient and elimination constant were then estimated by curve fitting the measured data to these models. Having these estimates would be of practical importance since inflammation surrounding implantable glucose sensors may be controlled through local release of …
Numerical Analysis Of Heat Transfer During Jet Impingement On Curved Surfaces, Cesar F. Hernandez-Ontiveros
Numerical Analysis Of Heat Transfer During Jet Impingement On Curved Surfaces, Cesar F. Hernandez-Ontiveros
USF Tampa Graduate Theses and Dissertations
The flow structure and convective heat transfer behavior of a free liquid jet ejecting from a round nozzle impinging vertically on a hemispherical solid plate and a slot nozzle impinging vertically on a cylindrical curved plate have been studied using a numerical analysis approach. The simulation model incorporated the entire fluid region and the solid hemisphere or curved plate. Solution was done for both isothermal and constant heat flux boundary conditions at the inner surface of the hemispherical plate and the constant heat flux boundary condition at the inner surface of the cylindrical shaped plate. Computations for the round nozzle …
What Are The Socio-Emotional Experiences And Perceptions Of Third Grade Students With High-Stakes Testing?, Anne Marie Juola-Rushton
What Are The Socio-Emotional Experiences And Perceptions Of Third Grade Students With High-Stakes Testing?, Anne Marie Juola-Rushton
USF Tampa Graduate Theses and Dissertations
The purpose of this study was to explore the experiences and perceptions of third grade students with high-stakes testing. The study was designed to address this issue from the perspective of the third grade student's experience and offer a venue for them to share their stories. The following research question guides this study: What are the socio-emotional experiences and perceptions of third grade students with high-stakes testing? Data analysis employed here falls under the rubric of qualitative approaches of symbolic interaction and phenomenology written in a narrative format with the provisions of portraiture. This study uses the analytical procedures set …
The Gothic As Counter-Discourse: Mark Twain, Charles Chesnutt And Toni Morrison, Hyejin, Kim
The Gothic As Counter-Discourse: Mark Twain, Charles Chesnutt And Toni Morrison, Hyejin, Kim
USF Tampa Graduate Theses and Dissertations
Revisiting the American Gothic via Julia Kristeva's theory of "the abject" demonstrates how Gothic strategies expose the historical contradictions of race in works by Mark Twain, Charles W. Chesnutt, and Toni Morrison. As theorized by Kristeva in Powers of Horror, the archaic process in which the subject attempts to constitute itself as homogeneous by casting off or "abjecting" all that cannot be assimilated to the self-same necessarily opens the way to repeated returns of the abject(ed) and the "horror" it provokes. Because the Gothic enacts the return of the abject, it was itself abjected from the literary canon until recently. …
A Pseudo-Rigid-Body Model For Spherical Mechanisms: The Kinematics And Elasticity Of A Curved Compliant Beam, Alejandro Leã³N
A Pseudo-Rigid-Body Model For Spherical Mechanisms: The Kinematics And Elasticity Of A Curved Compliant Beam, Alejandro Leã³N
USF Tampa Graduate Theses and Dissertations
This thesis improves a previous kinematic analysis and develops the elastic portion of the analysis of a curved compliant beam. This analysis is used to develop a Pseudo-Rigid-Body Model for the curved compliant beam. The Pseudo-Rigid-Body Model consist of kinematic and elastic parameters which can be used to simplify the computation of the large deflections of the beam as it undergoes spherical motion. The kinematic parameters that are developed are the characteristic radius, Gamma*length, the parametric angle coefficient, c_theta, and the kinematic parametrization limit, Capital_theta_max(Gamma). The elastic parameters developed are the stiffness coefficient, K_theta, and the elastic parameterization limit, Capital_theta_max(K). …
Venturesome Women: Nineteenth-Century British Women Travel Writers And Sport, Precious Mckenzie-Stearns
Venturesome Women: Nineteenth-Century British Women Travel Writers And Sport, Precious Mckenzie-Stearns
USF Tampa Graduate Theses and Dissertations
This dissertation analyzes the travel writings of Isabella Bird Bishop, Mary Kingsley, Florence Douglas Dixie, and Isabel Savory. While away from England, these women writers participated in cultural exchanges which led to reevaluations of British womanhood. British women travel writers operated not only within the power structures of gender but also within the structures of empire, class, and race. Women travel writers blazed the trail for the New Woman of the end of the century. Before cycling and cigarette smoking were allowed, daring women such as Isabella Bird Bishop and Mary Kingsley crisscrossed the globe in defiance of patriarchal tradition …
Elisa Brune’S Le Goût Piquant De L’Univers: A Translation And Introduction, Ryan Orgera
Elisa Brune’S Le Goût Piquant De L’Univers: A Translation And Introduction, Ryan Orgera
USF Tampa Graduate Theses and Dissertations
Le Goût piquant de l'Univers is written by the Francophone Belgian writer Elisa Brune. Brune holds a Ph.D. in environmental sciences, and this novel does not stray far from her training in science. The setting of this oeuvre is that of a Provençal village of Peyresq, the premiere annual rendezvous for the world's foremost cosmologists. The vocabulary employed in this book is that of highly scientific coteries. The work's sentence structure is a mix of dialogue, and unruly compound phrases. These two aforementioned stylistic choices made the translation of this work especially difficult. In translating, I worked with Dr. Gaëtan …
Effects Of Corrosion On Steel Reinforcement, David Ostrofsky
Effects Of Corrosion On Steel Reinforcement, David Ostrofsky
USF Tampa Graduate Theses and Dissertations
Corroded steel in concrete is a structural issue that plaques concrete structures in coastal regions. Traditionally corroded steel strength is calculated from a distributed area loss due to corrosion over the entire surface of the steel and reducing the capacity accordingly. In reality, corrosion attacks localized regions creating pits and reducing the cross section in a small region which amplifies the effects of corrosion. Stress concentrations at the corrosion pitting damage may further reduce the tensile capacity of the steel. A study of corrosion damage and strength associated with pitting damage can assist in understanding the ultimate tensile capacity of …
Factors Perceived To Contribute To Mathematics Avoidance Or Mathematics Confidence In Non-Traditional Age Women Attending A Community College, Jo Ann K Rawley
Factors Perceived To Contribute To Mathematics Avoidance Or Mathematics Confidence In Non-Traditional Age Women Attending A Community College, Jo Ann K Rawley
USF Tampa Graduate Theses and Dissertations
Over the past decade, the number of students entering postsecondary institutions immediately after high school has been decreasing, while the number of non-traditional aged students, defined as adults over 25, has substantially increased, with women making up the majority of this adult student group. Mathematics education is an area where non-traditional age women tend to have difficulty. Fifteen individual interviews were conducted with non-traditional age women enrolled in a community college, 10 identifying mathematics as the subject they would least enjoy and 5 identifying mathematics as the subject they would most enjoy. Data were analyzed by comparing the women's stories …
Examining The Issues Surrounding Violating The Assumption Of Independent Observations In Reliability Generalization Studies: A Simulation Study, Jeanine L. Romano
Examining The Issues Surrounding Violating The Assumption Of Independent Observations In Reliability Generalization Studies: A Simulation Study, Jeanine L. Romano
USF Tampa Graduate Theses and Dissertations
Because both validity and reliability indices are a function of the scores on a given administration of a measure, their values can often vary across samples. It is a common mistake to say that a test is reliable when in fact it is not the test that is reliable but the scores on the test that are reliable. In 1998, vacha-haase proposed a fixed-effects meta-analytic method for evaluating reliability that is similar to validity generalization studies called reliability generalization (rg). This study was conducted to evaluate alternative analysis strategies for the meta-analysis method of reliability generalization when the reliability estimates …
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 …
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 …
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 …
Life As A Student At An Independent Day School, Diana R. Torres
Life As A Student At An Independent Day School, Diana R. Torres
USF Tampa Graduate Theses and Dissertations
This study explores the interconnectedness of social class, education, and cultural capital. Considered academically elite, the independent school is be an ideal environment to find increased instances and opportunities for the acquisition and reproduction of elite, or "dominant" cultural capital. By implementing an ethnographic approach within an independent school setting, this study attempts to illuminate the student experience through adolescents' eyes. Past cultural capital studies focus on the relationship between cultural capital and academic achievement and/or social reproduction; instead, this study focuses on the everyday student experiences as they point to potential indicators of cultural capital. Results suggest that students' …
Experimental And Analytical Modeling Of The In Vivo And In Vitro Biomechanical Behavior Of The Human Lumbar Spine, Tov I. Vestgaarden
Experimental And Analytical Modeling Of The In Vivo And In Vitro Biomechanical Behavior Of The Human Lumbar Spine, Tov I. Vestgaarden
USF Tampa Graduate Theses and Dissertations
This dissertation has two major parts; Analytical and Experimental. The analytical section contains a study using Finite Element Analysis of dynamic instrumentation to demonstrate stress reduction in adjacent level discs. The experimental section contains biomechanical testing of facet fusion allograft technique and finally a comparison between In Vivo and In Vitro intradiscal pressures to determine forces acting on Lumbar spine segment L4-L5. A comprehensive study of available data, technology and literature was done. Conventional fusion instrumentation is believed to accelerate the degeneration of adjacent discs due to the increased stresses caused by motion discontinuity. A three dimensional finite element model …
Effect Of Personal And Practice Contexts On Occupational Therapists' Assessment Practices In Geriatric Rehabilitation, Mirtha Montejo Whaley
Effect Of Personal And Practice Contexts On Occupational Therapists' Assessment Practices In Geriatric Rehabilitation, Mirtha Montejo Whaley
USF Tampa Graduate Theses and Dissertations
Despite considerable debate surrounding an age associated cognitive decline in non-demented elders, recent studies indicate that changes attributable to normal aging affect cognitive processes and fluid abilities. Additionally, studies indicate that factors such as physical illness, depression, neurological damage, medication side effects, drug interactions, and the effects of surgery and anesthesia may also cause varying degrees of cognitive impairment. Impairment of cognitive function is known to affect treatment and rehabilitation outcomes for older persons, and increase their likelihood of institutionalization. Although proper screening and identification of cognitive deficits in geriatric patients are crucial in developing treatment plans, there is evidence …
Pneumatic Tool Hand-Arm Vibration And Posture Characterization Involving U.S. Navy Shipboard Personnel, Charles R. Wilhite
Pneumatic Tool Hand-Arm Vibration And Posture Characterization Involving U.S. Navy Shipboard Personnel, Charles R. Wilhite
USF Tampa Graduate Theses and Dissertations
The United States Navy incorporates many different occupations to ensure it achieves its overall mission. These occupations are extremely diversified and present a wide spectrum of occupational exposures. Many of these exposures have been well studied and documented. However, shipboard pneumatic tool hand-arm vibration, (HAV) and how it relates to different body postures is an area of occupational exposure that has received little attention. The chief objective of this study was to assess whether there is a difference in hand-arm vibration levels, while working on one of two surface orientations (e.g., horizontal and vertical) among distinctly different pneumatic tools while …
It Takes More Than Sun, Sea And Sand: The Case Of Tourism In The Tampa Bay Region, Circa 1970-2000, Joshua Wolf
It Takes More Than Sun, Sea And Sand: The Case Of Tourism In The Tampa Bay Region, Circa 1970-2000, Joshua Wolf
USF Tampa Graduate Theses and Dissertations
Coastal counties in the United States have placed a new emphasis on tourism related employment. The shift away from normal maritime work, such as fishing and import/export shipping has ushered in an era of service-oriented economies and communities scattered along the US coast lines. This trend which is associated with the transition from Fordism to post-Fordism can be seen most prevalently in Florida's Tampa Bay region. The counties that make up Tampa Bay include Citrus, Hernando, Hillsborough, Manatee, Pasco, Pinellas, and Sarasota.The lure of sandy beaches and blue seas are the obvious tourist draws to any tropical locale, including the …
Modeling Considerations For Vadose Zone Soil Moisture Dynamics, Jing Zhang
Modeling Considerations For Vadose Zone Soil Moisture Dynamics, Jing Zhang
USF Tampa Graduate Theses and Dissertations
Reproducing moisture retention behavior of the upper and lower vadose zone in shallow water table settings provides unique challenges for integrated (combined surface and groundwater) hydrological models. Field studies indicate that moisture retention in shallow water table settings is highly variably affected by antecedent state and air entrapment. The theory and vertical behavior of a recently developed integrated surface and groundwater model (IHM) is examined through comparisons to collected field data in West-Central Florida. The objectives of this study were to (1) Identify important considerations and behavior of the vadose zone for reproducing runoff, ET and recharge in shallow water …