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Statistical Learning And Behrens-Fisher Distribution Methods For Heteroscedastic Data In Microarray Analysis, Nabin K. Manandhr-Shrestha

USF Tampa Graduate Theses and Dissertations

The aim of the present study is to identify the di®erentially expressed genes be- tween two di®erent conditions and apply it in predicting the class of new samples using the microarray data. Microarray data analysis poses many challenges to the statis- ticians because of its high dimensionality and small sample size, dubbed as "small n large p problem". Microarray data has been extensively studied by many statisticians and geneticists. Generally, it is said to follow a normal distribution with equal vari- ances in two conditions, but it is not true in general. Since the number of replications is very small, …

System Identification In Automatic Database Memory Tuning, Tiffany Burrell

USF Tampa Graduate Theses and Dissertations

Databases are very complex systems that require database system administrators to perform system tuning in order to achieve optimal performance. Memory tuning is vital to the performance of a database system because when the database workload exceeds its memory capacity, the results of the queries running on a system are delayed and can cause substantial user dissatisfaction. In order to solve this problem, this thesis presents a platform modeled after a closed control feedback loop to control the level of multi-query processing. Utilizing this platform provides two key assets. First, the system identification is acquired, which is one of two …

Play: A Process-Driven Study Of Design Discovery, Kuebler Wilson Perry

USF Tampa Graduate Theses and Dissertations

Frequently, in architecture and in other professions, a results-oriented approach to design truncates the creative process. Architecture is a man-made intervention, ultimately involving a fair bit of destruction in order to eventually arrive in a state of hopefully coherent grace in the lives of its users and the built or natural context (Clark 2000, 10). It is unacceptable to proceed hastily into such complex territory-without a degree of rigor and process-driven creativity commensurate with the gravity of creating large scale, reality-altering, life-affecting structures.

A process-driven inquiry requires many hours of experiment, revision, and meandering about that may initially have no …

Architecture As Canvas, Monika Blazenovic

USF Tampa Graduate Theses and Dissertations

Cities are increasingly becoming vessels of consumption, while various opportunities for production of space and public expression are taken away from the city's inhabitants. New architectural interventions often disregard a site's previously developed character and further aid in wiping away memories closely related to a city's cultural past. Banja Luka, the second largest city of Bosnia and Herzegovina, has been an important cultural center, even through years of unrest. Within the city's main plaza stands an unfinished concrete structure (Fig. 3), built with pre-war conceptions of a hotel. The structure's location within the city of Banja Luka has provided for …

Design, Synthesis And Post-Synthetic Modifications Of Functional Metal-Organic Materials, Farid Nouar

USF Tampa Graduate Theses and Dissertations

Porous solids are a class of materials of high scientific and technological significance. Indeed, they have the ability to interact with atoms, ions or molecules not only at their surface but also throughout the bulk of the solid. This ability places these materials as a major class involved in many applications such as gas storage and separation, catalysis, drug delivery and sensor technology.

Metal-Organic Materials (MOMs) or coordination polymers (CPs) are crystalline compounds constructed from metal ions or clusters and organic components that are linked via coordination bonds to form zero-, one-, two or three-periodic structures. Porous Metal-Organic Materials (MOMs) …

Metal-Organic Materials: From Design Principles To Practical Applications, Mohamed H. Alkordi

USF Tampa Graduate Theses and Dissertations

The works presented herein outline rational design approaches towards construction of solid state materials with great potentials to answer some of current demanding applications. Specifically, the materials targeted are metal−organic materials with desirable structural features and functional properties. Metal−organic materials are constructed from organic linker molecules and metal ions under relatively mild solvothermal reaction conditions that preserve the structural features of the relatively simple building blocks. Therefore, it is feasible to conceive a retrospective pathway of the reaction and thus deconstruct the desirable structures into simple, chemicallyrelevant, building blocks in an approach known as the molecular building block approach. Due …

Perceptions Of Teachers In Their First Year Of School Restructuring: Failure To Make Adequate Yearly Progress, Sharon Moser

USF Tampa Graduate Theses and Dissertations

The 2007-2008 school year marked the first year Florida's Title I schools that did not made Adequate Yearly Progress (AYP) for five consecutive years entered into restructuring as mandated by the No Child Left Behind Act of 2001. My study examines the perceptions of teachers entering into their first year of school restructuring due to failure to achieve AYP. Four research questions guided my inquiry: What are the perceptions of teachers regarding their school's failure to make Adequate Yearly Progress? What are the understandings of teachers regarding the restructuring process? What are the perceptions of teachers regarding the restructuring process? …

Probabilistic Error Analysis Models For Nano-Domain Vlsi Circuits, Karthikeyan Lingasubramanian

USF Tampa Graduate Theses and Dissertations

Technology scaling to the nanometer levels has paved the way to realize multi-dimensional applications in a single product by increasing the density of the electronic devices on integrated chips. This has naturally attracted a wide variety of industries like medicine, communication, automobile, defense and even house-hold appliance, to use high speed multi-functional computing machines. Apart from the advantages of these nano-domain computing devices, their usage in safety-centric applications like implantable biomedical chips and automobile safety has immensely increased the need for comprehensive error analysis to enhance their reliability. Moreover, these nano-electronic devices have increased propensity to transient errors due to …

Priming Expectancies: Effects On Neurophysiological Indices Of Expectancy Violations And Drinking Behavior, Tyler Brumback

USF Tampa Graduate Theses and Dissertations

Investigations of the anticipated effects of alcohol indicate that cognitive frameworks are highly correlated with drinking and other variables associated with alcohol use, explaining up to 50% of the variance in drinking outcomes (Goldman, Darkes, & Del Boca, 1999; Goldman, 2002; Goldman et al., 2006; Goldman, Reich, & Darkes, 2006). Furthermore, alcohol expectancies appear to mediate the relationship between a variety of risk factors, such as sensation seeking, and alcohol outcomes (Darkes, Greenbaum, & Goldman, 2004). The current study examined the relationship of these cognitive networks with a physiological index of expectancy violation

Participants were presented with statements reflecting a …

Two Essays On Information Ambiguity And Informed Traders’ Trade-Size Choice, Ziwei Xu

USF Tampa Graduate Theses and Dissertations

Defining ambiguity as investor's uncertainty about the precision of the observed information, Chapter One constructs an empirical measure of ambiguity based on analysts' earnings forecast information, and finds that the market tends to react more negatively to highly ambiguous bad news, while it tends to be less responsive to highly ambiguous good news. This result supports the theoretical argument of Epstein and Schneider (2003, 2008) that ambiguity-averse investors take a worst-case assessment of the information precision, when they are uncertain about the information precision. In addition, Chapter One shows that returns on stocks exposed to highly ambiguous and intangible information …

Utilizing Contextualized Reading In Career And Technical Education To Enhance Reading Skills, Alan Duane Darr

USF Tampa Graduate Theses and Dissertations

The traditional education system in the United States developed a goal of sending a high number of students to post secondary schools. The expectation of going to college starts at elementary school and continues through high school and is pushed by the school district’s hierarchy. Schools annually publish numbers through the Department of Education at state and national levels of students moving to college. College progression has become such a priority that many students feel they have failed if not college bound.

Students not considered academic often move toward vocational education with the intent of post-secondary education to support a …

Refinement Of A Chemistry Attitude Measure For College Students, Xiaoying Xu

USF Tampa Graduate Theses and Dissertations

This work presents the evaluation and refinement of a chemistry attitude measure, Attitude toward the Subject of Chemistry Inventory (ASCI), for college students. The original 20-item and revised eight-item versions of ASCI (V1, V2, V3 and V3.1) were administered to different samples. The evaluation for ASCI had two main foci on the psychometric properties: reliability and validity. Both psychological theory and factor analysis techniques were applied to guide instrument refinement. Evidence for good reliability and validity was established for ASCI V2 score interpretation. The two-factor correlated structure was supported by confirmatory factor analysis. The two subscales, intellectual accessibility and emotional …

Heat Stress Evaluation Of Protective Clothing Ensembles, Amanda Lee Pease

USF Tampa Graduate Theses and Dissertations

Clothing directly affects the level of heat stress exposure. Useful measures to express the thermal characteristics are WBGT (wet bulb globe temperature) clothing adjustment factor (CAF) or apparent total evaporative resistance (R_e,T,_a). The CAF is assigned through laboratory wear trials following a heat stress protocol in which the air temperature and humidity are progressively increased until the participant clearly loses the ability to maintain thermal equilibrium. The critical condition is the point of thermal transition and from these conditions both the CAF and Re,T,a are computed. The first objective of this study is to compare the …

Serum Antibodies To Human Papillomavirus Type 6, 11, 16 And 18 And Their Role In The Natural History Of Hpv Infection In Men, Beibei Lu

USF Tampa Graduate Theses and Dissertations

Our understanding of humoral immune response to human papillomavirus (HPV) infection has been mainly derived from studies in women. Very little is known about humoral immune response to HPV in men. There is also a growing interest in understanding the burden of HPV exposure in the subgroups of the male population, including men who have sex with women (MSW), men who have sex with men (MSM) and men who have sex with both men and women (MSMW). This dissertation was undertaken to understand and characterize humoral immune response, measured by detectable serum antibody IgG, to HPV 6, 11, 16 and …

School Choice At The Crossroads Of Race, Class, And Accountability: An Analysis Of The Effects Of Voluntary School Choice On Elementary Schools In A Large District In The Southeastern United States, Teresa Craig Evans

USF Tampa Graduate Theses and Dissertations

In recent years, the responsibility for the desegregation of American public schools has transitioned from federal court mandates to school board programs and policies. There is widespread belief that this has resulted in the resegregation of schools across the country. One popular policy that is purported to provide the opportunity for voluntary integration, along with accountability for academic quality, is school choice. The purpose of this study was to consider the implications of such a policy in one large school district. There is an extensive body of research exploring who participates in school choice, how they make their choices, and …

Relationships Between Life Satisfaction, Symptoms Of Adhd, And Associated Outcomes In Middle School Students, Lisa Paige Bateman

USF Tampa Graduate Theses and Dissertations

Given increased evidence related to the importance of fostering life satisfaction in the overall population (Diener & Diener, 1996), as well as recent suggestions regarding the importance of increasing positive academic and social outcomes for youth with ADHD (DuPaul, 2007), it is important to gain a clearer understanding of how life satisfaction may be related to ADHD symptoms. Although research has examined the relationship between life satisfaction and externalizing behavior (Suldo & Huebner, 2004a), research on the relationship between life satisfaction and ADHD is currently limited. This study examined if levels of ADHD symptoms predicted reports of life satisfaction in …

Magnetocaloric Effect In Thin Films And Heterostructures, Christopher Bauer

USF Tampa Graduate Theses and Dissertations

The goals of this work are the optimization of the magnetocaloric effect in Gadolinium thin film structures. We approach this issue from two directions, that of process optimization and of interface effects. Past results showed Gd₂O₃ in our Gadolinium thin films, and the presence of such oxide seemed to grow with the temperature at which the film was grown or annealed. Comparison of samples grown without chamber gettering to those that were gettered show differences in their structural and magnetic properties, and we conclude that gettering is an effective step in enhancing the quality of Gd thin …

Active Surveillance And Incidence Rate Of Dengue Infection In A Cohort Of High Risk Population In Maracay, Venezuela., Carlos Espino

USF Tampa Graduate Theses and Dissertations

In the absence of an effective vaccine, vector control and surveillance of dengue fever (DF) and dengue hemorrhagic fever (DHF) are the most important strategies currently used to reduce the impact of these diseases in affected population. The objectives of this study were to estimate the incidence of symptomatic and asymptomatic dengue cases, the prevalence of antidengue antibodies, and to evaluate the laboratory and clinical aspects related to an active surveillance of dengue cases. In this study, active surveillance was incorporated as a part of the study design. At total of 3,255 people from four high risk neighborhoods were followed …

The Effectiveness Of Prevent-Teach-Reinforce: Does The Presence Of Comorbid Internalizing Behavior Problems Moderate Outcomes For Children With Externalizing Behavior Problems?, Bonnie Saari

USF Tampa Graduate Theses and Dissertations

This study examined the effectiveness of a school-based intervention process known as Prevent-Teach-Reinforce for children with a combination of externalizing and internalizing behaviors compared to children with only externalizing behaviors. The dependent variables examined were social skills, problem behaviors, and academic engaged time. Data for the current study were taken from archival data collected by the Florida Mental Health Institute that included students in kindergarten through 8th grade. A series of repeated-measures analysis of variance (ANOVA) was used to identify differences in improvement on the dependent variables for the two groups of students.

Research questions focused on the main effects …

Saving Energy In Network Hosts With An Application Layer Proxy: Design And Evaluation Of New Methods That Utilize Improved Bloom Filters, Miguel Jimeno

USF Tampa Graduate Theses and Dissertations

One of the most urgent challenges of the 21st century is to investigate new technologies that can enable a transition towards a society with a reduced CO₂ footprint. Information Technology generates about 2% of the global CO₂, which is comparable to the aviation industry. Being connected to the Internet requires active participation in responding to protocol messages. Billions of dollars worth of electricity every year are used to keep network hosts fully powered-on at all times only for the purpose of maintaining network presence. Most network hosts are idle most of the time, thus presenting a huge …

Synthesis Of Local Thermo-Physical Models Using Genetic Programming, Ying Zhang

USF Tampa Graduate Theses and Dissertations

Local thermodynamic models are practical alternatives to computationally expensive rigorous models that involve implicit computational procedures and often complement them to accelerate computation for real-time optimization and control. Human-centered strategies for development of these models are based on approximation of theoretical models. Genetic Programming (GP) system can extract knowledge from the given data in the form of symbolic expressions. This research describes a fully data driven automatic self-evolving algorithm that builds appropriate approximating formulae for local models using genetic programming. No a-priori information on the type of mixture (ideal/non ideal etc.) or assumptions are necessary.

The approach involves synthesis of …

Developing The Nomological Network Of Perceived Corporate Affinity For Technology: A Three Essay Dissertation, David Earl Fleming

USF Tampa Graduate Theses and Dissertations

Technology is changing the face of both the sales and service domains. Honebein and Cammarano (2006) note that properly implemented self-service technologies serve dual purposes of decreasing firm overhead costs, while simultaneously engaging the customer in a way encourages the co-create of value for both parties. To get these benefits stakeholders must be willing to adopt and use the technologies that are available.

Traditionally, this has lead to the research question "How do firms do this?" However, according to a recent article by Woodall, Colby and Parasuraman (2007), consumers are now demanding more technology-based options and becoming more technologically savvy. …

Linear And Nonlinear Control Of Unmanned Rotorcraft, Ioannis A. Raptis

USF Tampa Graduate Theses and Dissertations

The main characteristic attribute of the rotorcraft is the use of rotary wings to produce the thrust force necessary for motion. Therefore, rotorcraft have an advantage relative to fixed wing aircraft because they do not require any relative velocity to produce aerodynamic forces. Rotorcraft have been used in a wide range of missions of civilian and military applications. Particular interest has been concentrated in applications related to search and rescue in environments that impose restrictions to human presence and interference.

The main representative of the rotorcraft family is the helicopter. Small scale helicopters retain all the flight characteristics and physical …

An Intermediate Extended Literacy Routine To Support Struggling Third Grade Readers, Jeani Z. Fullard

USF Tampa Graduate Theses and Dissertations

Large numbers of children in the United States are not functioning at adequate levels of literacy. Students who have weak reading proficiency skills are identified as at-risk; failure to acquire competency early in their schooling adversely affects performance in all academic fields and limits their potential for achievement in life. There is an extensive knowledge base about the skills and strategies children must learn in order to read well. Effective fluency and comprehension strategies need to be taught to help students become powerful, active readers who are in control of their learning.

This study evaluated a structured classroom model …

Revitalization And Modernization Of Old Havana, Cuba, Mileydis Hernandez

USF Tampa Graduate Theses and Dissertations

Architecture around the world has been very influential for determining the historical background of many cities. The architecture of the city of Havana in Cuba is etched with unique historical forces and signature buildings. This architecture embodies local reproductions of Western and European styles. The superimposing of Western and European styles led to the formation of a "strange baroquism" that defined the "lasting features of the overall idiosyncrasy of the city."

Since Cuba's change of government in the 1950s, architecture has progressed very little. From the day Castro took power, Havana's skyline has hardly altered. After the fall of the …

Mathematics Education: The Voice Of African American And White Adolescents, Sharondrea R. King

USF Tampa Graduate Theses and Dissertations

Several studies have provided evidence regarding factors that contribute to the mathematics achievement gap between African American and White students. Byrnes (2003) found that 45%-50% of the difference in White and African American students' performance in mathematics was associated with socioeconomic status, exposure to learning opportunities, and motivational aspects of math while 4.5% was explained by ethnicity. The goal in this mixed method study was to examine the mathematics attitude of African American (n = 22) and White (n = 10) high school students and to allow students to voice what practices and supports they perceived enabled them to learn …

Investigation Of The Factors Influencing Skid Resistance And The International Friction Index, Luis G. Fuentes

USF Tampa Graduate Theses and Dissertations

This dissertation is compiled of the findings of several phases of a detailed research study that was aimed at investigating the Skid Resistance phenomenon. In the first phase of the dissertation research a study was performed to evaluate the different factors that influence frictional measurements obtained using the Dynamic Friction Tester (DFT). A temperature calibration factor that would account for temperature effects on DFT readings and IFI computations was developed. In addition, other variables that also affect the friction measurements obtained using the DFT are identified. In the next phase of the dissertation research the effect of pavement roughness on …

Task Oriented Simulation And Control Of A Wheelchair Mounted Robotic Arm, Fabian Farelo

USF Tampa Graduate Theses and Dissertations

The main objective of my research is to improve the control structure for the new Wheelchair Mounted Robotic Arm (WMRA) to include new algorithms for optimized task execution; that is, making the WMRA a modular task oriented mobile manipulator. The main criterion to be optimized is the fashion in which the wheelchair approaches a final target as well as the starting and final orientation of the wheelchair. This is a novel approach in non-holonomic wheeled manipulators that will help in autonomously executing complex activities of daily living (ADL) tasks.

The WMRA is a 9 degree of freedom system, which provides …

A Computational Kinematics And Evolutionary Approach To Model Molecular Flexibility For Bionanotechnology, Athina N. Brintaki

USF Tampa Graduate Theses and Dissertations

Modeling molecular structures is critical for understanding the principles that govern the behavior of molecules and for facilitating the exploration of potential pharmaceutical drugs and nanoscale designs. Biological molecules are flexible bodies that can adopt many different shapes (or conformations) until they reach a stable molecular state that is usually described by the minimum internal energy. A major challenge in modeling flexible molecules is the exponential explosion in computational complexity as the molecular size increases and many degrees of freedom are considered to represent the molecules' flexibility. This research work proposes a novel generic computational geometric approach called enhanced BioGeoFilter …

Performance Analysis Of A Binary-Tree-Based Algorithm For Computing Spatial Distance Histograms, Sadhana Sharma Luetel

USF Tampa Graduate Theses and Dissertations

The environment is made up of composition of small particles. Hence, particle simulation is an important tool in many scientific and engineering research fields to simulate the real life processes of the environment. Because of the enormous amount of data in such simulations, data management, storage and processing are very challenging tasks. Spatial Distance Histogram (SDH) is one of the most popular queries being used in this field. In this thesis, we are interested in investigating the performance of improvement of an existing algorithm for computing SDH. The algorithm already being used is using a conceptual data structure called density …