Digital Commons Network^™

Certain Diagonal Equations Over Finite Fields, Christopher Sze

USF Tampa Graduate Theses and Dissertations

Let F_q^t be the finite field with q^t elements and let F*_q^t be its multiplicative group. We study the diagonal equation ax^q−1 + by^q−1 = c, where a,b and c ∈ F*_q^t. This equation can be written as x^q−1+αy^q−1 = β, where α, β ∈ F ∗ q t . Let Nt(α, β) denote the number of solutions (x,y) ∈ F*_q^t × F*_q^t of x^q−1 + αy^q−1 = β and I(r; a, b) be the number of monic irreducible polynomials f …

The Neuron-Silicon Carbide Interface: Biocompatibility Study And Bmi Device Development, Christopher L. Frewin

USF Tampa Graduate Theses and Dissertations

Damage to the central nervous system (CNS) leads to the generation of an immune response which culminates with the encapsulation of the damaged area. The encapsulation, known as a glial scar, essentially breaks neural signal pathways and blocks signal transmissions to and from the CNS. The effect is the loss of motor and sensory control for the damaged individual. One method that has been used successfully to treat this problem is the use of a brain-machine interface (BMI) which can intercept signals from the brain and use these signals to control a machine. Although there are many types of BMI …

Combinatorial Models For Dna Rearrangements In Ciliates, Angela Angeleska

USF Tampa Graduate Theses and Dissertations

Motivated by genome rearrangements that take place in some species of ciliates we introduce a combinatorial model for these processes based on spatial graphs. This model builds up on two earlier models for pointer-guided DNA recombination (intramolecular model introduced in [22, 23] and intermolecular model introduced in [35, 36]) and is influenced by a molecular model for RNA guided DNA recombination (introduced in [2]).

Despite their differences, the intermolecular and intramolecular model formalize the recombination events through rewriting operations applied on formal words. Both models predict the same set of molecules as a result of correct rearrangement. Here, we give …

An Empirical Analysis Of Public Perception Of Reclaimed Water Applying The Situational Theory Of Publics, Jessica Voss

USF Tampa Graduate Theses and Dissertations

Utilizing J.E. Grunig's (1989a, 1997) situational theory of publics and Fishbein and Ajzen's (1975) theory of reasoned action, this empirical study examined the public's perception of reclaimed water. Specifically, the three independent variables - problem recognition, constraint recognition, and level of involvement - were separated into internal and external variables to determine their influences on behavioral intention. The independent variables were also used to determine the public's communication behavioral intention.

The findings of this study support the basic premise of the situational theory of publics and contribute to the extension of the theory through the inclusion of some of the …

Ionic Liquid-Mediated Sol-Gel Sorbents For Capillary Microextraction And Challenges In Glass Microfabrication, Anne M. Shearrow

USF Tampa Graduate Theses and Dissertations

Three ionic liquids (ILs), trihexyltetradecylphosphonium tetrafluoroborate (TTPT), N-butyl-4-methylpyridinium tetrafluoroborate (BMPT), and 1-methyl-3- octylimidazolium tetrafluoroborate (MOIC), were utilized to prepare sol- gel sorbent coatings. Non-polar polydimethylsiloxane (PDMS) and polar poly(ethylene glycol) (PEG), poly(tetrahydrofuran) (PolyTHF) and bis[(3-methyldimethoxy-silyl)propyl] polypropylene oxide (BMPO) polymers were employed to develop novel ionic liquidmediated sol- gel hybrid organic- inorganic sorbents. The novel sorbents were first tested as coatings for capillary microextraction off-line hyphenated to gas chromatography. To gain an understanding of the role of the ionic liquids in the sol-gel process, the preconcentration abilities of these novel coatings were investigated for several classes of compounds utilizing CME-GC. This …

Blind Signal Detection And Identification Over The 2.4ghz Ism Band For Cognitive, Omar Zakaria

USF Tampa Graduate Theses and Dissertations

'It is not a lack of spectrum. It is an issue of efficient use of the available spectrum"--conclusions of the FCC Spectrum Policy Task Force.

There is growing interest towards providing broadband communication with high bit rates and throughput, especially in the ISM band, as it was an ignition of innovation triggered by the FCC to provide, to some extent, a regulation-free band that anyone can use. But with such freedom comes the risk of interference and more responsibility to avoid causing it. Therefore, the need for accurate interference detection and identification, along with good blind detection capabilities are inevitable. …

Some Combinatorial Structures Constructed From Modular Leonard Triples, Jessica Sobkowiak

USF Tampa Graduate Theses and Dissertations

Let V denote a vector space of finite positive dimension. An ordered triple of linear operators on V is said to be a Leonard triple whenever for each choice of element of the triple there exists a basis of V with respect to which the matrix representing the chosen element is diagonal and the matrices representing the other two elements are irreducible tridiagonal. A Leonard triple is said to be modular whenever for each choice of element there exists an antiautomorphism of End(V) which fixes the chosen element and swaps the other two elements. We study combinatorial structures …

Praxis And Theōria: Heidegger’S “Violent” Interpretation, Megan E. Altman

USF Tampa Graduate Theses and Dissertations

This paper attempts to mark out new ground in the connections between the philosophical writings of Martin Heidegger and Aristotle by posing an interesting question that has never been addressed. Both writers devote much of their early thoughts to questions concerning human beings' practical ways of understanding. However, in their later thoughts Heidegger and Aristotle suddenly seem to completely change the subject to ideal or transcendental ways of understanding. At first glance these ideal modes of human apprehension seem to have nothing to do with each other. Yet, Heidegger and Aristotle seem to have similar motives for turning away from …

Associate In Science (As) To Bachelor Of Science In Applied Science (Bsas) Transfer Students: An Analysis Of Student Characteristics, Engagement, And Success, Jerry C. Collins

USF Tampa Graduate Theses and Dissertations

This study sought to examine and comprehensively describe transfer students who have earned a two-year technical or occupational Associate in Science (AS) degree at the community college and entered the university to pursue the Bachelor of Science in Applied Science (BSAS).

The BSAS degree is a specialized baccalaureate degree program created to allow AS degree holders an opportunity to efficiently transfer into the university affording them full recognition of their two-year degree. This statewide articulated program at the University of South Florida is the first of its kind in the state of Florida. The program only began admitting its first …

Truth And Judgment, Jeremy J. Kelly

USF Tampa Graduate Theses and Dissertations

I examine the difficulties that several philosophers of language are liable to encounter in their attempts to provide an account of the connection between truth and assertion. I then attempt to provide an account of this connection. The analysis is concerned chiefly with difficulties which consist in elucidating the conceptual connection between truth and assertion in a way that respects certain linguistic intuitions while at the same time rendering the concept of truth amenable to a semantic interpretation. The proposed view suggests one way in which we might go about meeting the theoretical demands implicit in addressing this concern, among …

The Effects Of Diameter Fluctuations And Coiling On The Sensitivity Of Sapphire Single Crystal Optical Fiber Evanescent Wave Fluorescence Sensors, Jimmy Ray Gamez

USF Tampa Graduate Theses and Dissertations

The purpose of this research was to determine the effect of diameter fluctuations on the sensitivity of sapphire multimode optical fibers used as evanescent wave fluorescence sensors. It was predicted that fluctuations in the diameter of the fiber would act as a series of bi-tapers converting lower order modes to higher order modes increasing the evanescent wave penetration depth thereby increasing the excitation of a cladding of fluorescent fluid. Induced fluorescence from the fluid cladding would then couple back into the fiber more efficiently increasing the sensitivity of the sensor.

The effect of coiling the fiber on the sensitivity of …

Form And Numbers: Mathematical Patterns And Ordering Elements In Design, Alison Marie Thom

USF Tampa Graduate Theses and Dissertations

In America, buildings are often constructed with the intent of being utile only 30-40 years. All over the world though, there are buildings that are hundreds of years old that are still very functional. Historically, architecture was a part of mathematics, and in many periods of the past, the two were indistinguishable. Architects were often required to be also mathematicians in ancient times. The idea of this thesis is to identify the relationship between mathematics and architecture and to reintroduce them in order to create a module for successful design .

Presence of mathematical boundaries help to attain visual consistency …

A Rational Choice Approach To Professional Crime Using A Meta-Synthesis Of The Qualitative Literature, Douglas J. Wholl

USF Tampa Graduate Theses and Dissertations

Since the early 18th century, rational choice models have been applied extensively to criminological research, theory, and policy in an effort to understand crime and criminality. Over the past few decades, the rational choice perspective has attempted to integrate theoretical concepts, operational measures, and research findings from contemporary studies within the psychology, sociology and criminology disciplines, which have attempted to re-operationalize what was already conceptualized in the expected utility model (i.e., individuals choose to engage in criminal activity if the expected utility of crime exceeds that of all other behavioral options) by incorporating additional factors (e.g., a broader range of …

Closure Between Apparent And Inherent Optical Properties Of The Ocean With Applications To The Determination Of Spectral Bottom Reflectance, James Edward Ivey

USF Tampa Graduate Theses and Dissertations

This study focuses on comparing six different marine optical models, field measurements, and laboratory measurements. Inherent Optical Properties (IOPs) of the water column depend only on the constituents within the water, not on the ambient light field. Apparent Optical Properties (AOPs) depend both on IOPs and the geometric underwater light field resulting from solar irradiance. Absorption (a) and scattering (b) are IOPs. Scattering can be partitioned into backscattering (b[subscript b]). Remote Sensing Reflectance (R[subscript rs]), the ratio of radiant light leaving the water to the light entering the water surface plane (E[subscript d]), is an AOP. R[subscript rs] is proportional …

Statistical And Data Mining Methodologies For Behavioral Analysis In Transgenic Mouse Models Of Alzheimer’S Disease: Parallels With Human Ad Evaluation, Ralph E. Leighty

USF Tampa Graduate Theses and Dissertations

Alzheimer’s disease (AD) is a progressive neurodegenerative disorder and the leading cause of human senile dementia. Alzheimer’s represents a significant public health concern, having widespread social and economic implications. Consequently, protocols for early detection and therapeutic intervention (both behavioral and pharmacologic) constitute important targets for medical investigation. Furthermore, contemporary research depends upon comprehensive neurobehavioral assessment and advanced statistical and computational analytic methodologies for characterizing AD-associated sensorimotor and cognitive impairment, as well as evaluating therapeutic efficacy. This dissertation introduces data mining-based techniques (decision trees, neural networks, support vector machines) for behavioral analysis in both nontransgenic and Alzheimer’s transgenic mice, to evaluate …

Evaluation Of The Efficacy Of The Minimum Size Rule In The Red Grouper And Red Snapper Fisheries With Respect To J And Circle Hook Mortality And Barotrauma And The Consequences For Survival And Movement, Karen Mary Burns

USF Tampa Graduate Theses and Dissertations

Although closed seasons, bag limits and quotas are used to manage fishes within the Grouper/Snapper Complex off the southeastern United States, size limits are the cornerstone of fisheries management. Because fishers must release all undersized fishes despite fish condition, this regulation has created a mandatory catch and release system. Inherent in this management strategy is the supposition that these undersized fish survive in sufficient numbers so as to justify this regulation. To satisfy this criteria fish mortality must be low and released fish must also experience minimal sub-lethal effects. Determination of sublethal effects and evaluation of their potential impairment and …

Novel Roles For B-Raf In Mitosis And Cancer, Meghan E. K Borysova

USF Tampa Graduate Theses and Dissertations

The MAP kinase pathway is well known for its key roles in regulating cell proliferation and cell cycle progression. MAP kinases have also been implicated in mitotic functions, however these functions are less-well understood. Recent studies from our laboratory used Xenopus egg extracts to identify B-Raf as an essential activator of the MAPK cascade during mitosis. Therefore, the first objective of my dissertation research was to determine if B-Raf has functional significance during mitosis in human somatic cells.

Using RNA interference against B-Raf and various immunofluorescence techniques, I show that B-Raf: (1) localizes to and is phosphorylated at a key …

Assessing The Performance Of Water Bodies In Hillsborough County, Florida Using Data Envelopment Analysis (Dea), Geoffrey George Fouad

USF Tampa Graduate Theses and Dissertations

The purpose of this thesis is to describe the relationship between surface water quality and land use. Water management recommendations will be divulged based upon the interaction of lake water quality and land use. The methodology developed for this research applied Data Envelopment Analysis (DEA), a performance measurement tool, to evaluate lake water quality in relation to surrounding land use. Lake performance ratings were generated by DEA software that assessed multiple variables describing surface water nutrient loads and surrounding land use. Results from this analysis revealed a significant trend between lake water quality and land use within the study area. …

African American Perceptions Of The Florida Comprehensive Assessment Test (Fcat) And High School Graduation, Maressa L. Dixon

USF Tampa Graduate Theses and Dissertations

While there is ample research theorizing reasons for so-called "achievement gaps" between African American and White students on standardized tests, few studies explore African Americans' perceptions of the impact these tests have on overall education. Through interviews with six current students attending Hillsborough County public high schools, one recent graduate of a Hillsborough County high school, and two parents of students in Hillsborough County public schools, this research study probes participants' perceptions of the impact of the Florida Comprehensive Assessment Test (FCAT) on their high school experiences. All participants in the study identified as African American or Black. Through archival …

Germania-Based Sol-Gel Organic-Inorganic Hybrid Coatings For Capillary Microextraction, Li Fang

USF Tampa Graduate Theses and Dissertations

For the first time, germania-based hybrid organic-inorganic sol-gel materials were developed for analytical sample preparation and chromatographic separation. Being an isostructural analog of silica (SiO₂), germania (GeO₂) is compatible with silica network. This structural similarity, which is reflected by the relative positions of germanium and silicon in the periodic table, stimulated our investigation on the development of germania-based sol-gel hybrid organic-inorganic coatings for analytical applications.

Sol-gel sorbents and stationary phases reported to date are predominantly silica-based. Poor pH stability of silica-based materials is a major drawback. In this work, this problem was addressed through development of …

Asynchronous Cellular Automata - Special Networks Local Slowdown Produces Global Speedup, Arash Khani Ardestani

USF Tampa Graduate Theses and Dissertations

Information processing in living tissues is dramatically different from what we see in common man-made computer. The data and processing is distributed into the activity of cells which communicate only with neighboring cells. There is no clock for the global synchronization of cellular activities. There is not even one bit of central memory for globally shared data. The communication network between cells is highly irregular and may change without changing the outcome of the computation. A simple network of automata is introduced and analyzed to represent a mathematical model of special group of cells in an imaginary tissue sample. The …

Christoffel Function Asymptotics And Universality For Szegő Weights In The Complex Plane, Elliot M. Findley

USF Tampa Graduate Theses and Dissertations

In 1991, A. Máté precisely calculated the first-order asymptotic behavior of the sequence of Christoffel functions associated with Szego measures on the unit circle. Our principal goal is the abstraction of his result in two directions: We compute the translated asymptotics, lim_n λ_n(µ, x + a/n), and obtain, as a corollary, a universality limit for the fairly broad class of Szego weights. Finally, we prove Máté’s result for measures supported on smooth curves in the plane. Our proof of the latter derives, in part, from a precise estimate of certain weighted means of the Faber polynomials associated …

Smart Grid Reliability Assessment Under Variable Weather Conditions, Arif Islam

USF Tampa Graduate Theses and Dissertations

The needs of contemporary electric utility customers and expectations regarding energy supply require dramatic changes in the way energy is transmitted and delivered. A smart grid is a concept by which the existing and aging electrical grid infrastructure is being upgraded with integration of multiple applications and technologies; such as two way power transfer, two way communication, renewable distributed generation, automated sensors, automated & advanced controls, central control, forecasting system and microgrids. This enables the grid to be more secure, reliable, efficient, self-healing, while reducing greenhouse gases. In addition, it will provide new products & services and fully optimize asset …

Leaching Of Active Ingredients From Blueberries And Cranberries Using Supercritical Carbon Dioxide And Ethanol As An Entrainer And Analyzing Using Gc/Ms, Nada H. Elsayed

USF Tampa Graduate Theses and Dissertations

Routine consumption of blueberries and cranberries has been shown to have great health benefits. Blueberries have high amounts of anthocyanin content per serving. Anthocyanins are known to be powerful antioxidants and are linked to the reduction of heart disease and cancer. New research suggests that the berries may also play a role in slowing down age related diseases such as memory loss and tissue damage caused by Alzheimer's. In addition the berries have a variety of essential vitamins and minerals that are important for overall health. Cranberries have long been used to treat urinary tract infections due to the high …

Advanced Transceiver Algorithms For Ofdm(A) Systems, Hisham A. Mahmoud

USF Tampa Graduate Theses and Dissertations

With the increasing advancements in the digital technology, future wireless systems are promising to support higher data rates, higher mobile speeds, and wider coverage areas, among other features. While further technological developments allow systems to support higher computational complexity, lower power consumption, and employ larger memory units, other resources remain limited. One such resource, which is of great importance to wireless systems, is the available spectrum for radio communications. To be able to support high data rate wireless applications, there is a need for larger bandwidths in the spectrum. Since the spectrum cannot be expanded, studies have been concerned with …

The Quasi-Uniformity Condition And Three-Dimensional Geometry Representation As It Applies To The Reproducing Kernel Element Method, Nathaniel O. Collier

USF Tampa Graduate Theses and Dissertations

The Reproducing Kernel Element Method (RKEM) is a hybrid between finite elements and meshfree methods that provides shape functions of arbitrary order and continuity yet retains the Kronecker-delta property. To achieve these properties, the underlying mesh must meet certain regularity constraints, unique to RKEM. The aim of this dissertation is to develop a precise definition of these constraints, and a general algorithm for assessing a mesh is developed. This check is a critical step in the use of RKEM in any application.

The general checking algorithm is made more specific to apply to two-dimensional triangular meshes with circular supports and …

A Course-Based Model Of Transfer Effectiveness Of Community College Students Transferring To A Large, Urban University, Elizabeth Steinhardt Stewart

USF Tampa Graduate Theses and Dissertations

Florida's undergraduate organization of higher education is a 2 + 2 system in which students are encouraged to complete freshmen and sophomore years at a community college and then transfer to a state university. Florida statutes provide for a highly articulated educational system to facilitate seamless transition from one public institution to another. The researcher investigated the transfer function's effectiveness among community college students subsequent to enrollment at a large, urban, doctoral/research extensive university in Florida using a course-based model of transfer success. The research explored whether differences existed in academic performance in targeted upper-division undergraduate courses between native and …

Comparison Of Routing And Network Coding In Group Communications, Yangyang Xu

USF Tampa Graduate Theses and Dissertations

In traditional communication networks, information is delivered as a sequence of packets from source to destination by routing through intermediate nodes which only store and forward those packets. Recent research shows that routing alone is not sufficient to achieve the maximum information transmission rate across a communication network [1]. Network coding is a currently researched topic in information theory that allows the nodes to generate output data by encoding their received data. Thus, nodes may mix the input packets together and send them out as fewer packets. Potential throughput benefit is the initial motivation of the research in network coding. …

Moment-Dependent Pseudo-Rigid-Body Models For Beam Deflection And Stiffness Kinematics And Elasticity, Diego Alejandro Espinosa

USF Tampa Graduate Theses and Dissertations

This thesis introduces a novel parametric beam model for describing the kinematics and elastic properties of ortho-planar compliant Micro-Electro-Mechanical Systems (MEMS) with straight beams subject to specific buckling loads. Ortho-planar MEMS have the ability to achieve motion out the plane on which they were fabricated, characteristic that can be used to integrate optical devices such as variable optical attenuators and micro-mirrors. In addition, ortho-planar MEMS with large output forces and long strokes could be used to develop new applications such as tactile displays, active Braille, and actuation of micro-mirrors. In order to analyze the kinematics and elasticity of a curved …

Techniques For Vlsi Circuit Optimization Considering Process Variations, Mahalingam Venkataraman

USF Tampa Graduate Theses and Dissertations

Technology scaling has increased the transistor's susceptibility to process variations in nanometer very large scale integrated (VLSI) circuits. The effects of such variations are having a huge impact on performance and hence the timing yield of the integrated circuits. The circuit optimization objectives namely power, area, and delay are highly correlated and conflicting in nature. The inception of variations in process parameters have made their relationship intricate and more difficult to optimize. Traditional deterministic methods ignoring variation effects negatively impacts timing yield. A pessimistic worst case consideration of variations, on the other hand, can lead to severe over design. In …