Digital Commons Network^™

Bioinformatic Analysis Of Solanaceae Chloroplast Genomes And Characterization Of An Arabidopsis Protein Disulfide Isomerase In Transgenic Tobacco Chloroplasts, Justin James Grevich

Electronic Theses and Dissertations

Throughout history, traditional plant breeding has been used to provide resistance to pests, disease and other forms of environmental stress, as well as to increase yield and improve upon quality and processing attributes. Over the last decade, the advancement in sequencing technology and bioinformatic analysis has unleashed a wealth of knowledge about chloroplast genetic organization and evolution. The lack of complete plastid genome sequences is one of the major limitations in advancing plastid genetic engineering to other useful crops. This is due to the fact that plastid genome sequences are essential for the identification of endogenous regulatory sequences and optimal …

Studies On The Novel Function Of Amyloid Precursor Protein In Glial Differentiation Of Neural Stem Cells, Young-Don Kwak

Electronic Theses and Dissertations

Although amyloid β (Aβ) deposition has been a hallmark of Alzheimer’s disease (AD), the physiological function of amyloid precursor protein (APP) is not clear. Our results suggested that high concentration of APP induces glial differentiation while physiological level of APP promotes migration and differentiation of neural stem cell (HNSC). HNSCs were mainly differentiated into astrocytes when they are transplanted into APP transgenic mouse brain or treated with a high concentration of secreted-type APP (sAPP) in culture. Staurosporine (STS) induced a distinctive astrocytic morphology in NT-2/D1 neural progenitor cells with expressions of APP and astrocyte-specific markers, glial fibrillary acidic protein (GFAP), …

Effects Of Patch Size And Matrix Type On Bird Assemblages Within Central Florida Cypress Domes, Julia Noran

Electronic Theses and Dissertations

The numerous studies on the effects of patch size on bird assemblages have produced varied results. I studied the effects of patch size and surrounding matrix on bird assemblages within central Florida cypress domes. My null hypothesis was that bird assemblages within cypress domes are unaffected by dome size or development in the matrix around the dome. My alternative hypothesis was that differences in bird assemblages are correlated with size and the degree of development within the matrix. I classified a pool of over a thousand domes according to three size categories and four matrix types. Three representatives for each …

Surviving Reality: Survivor & Parasocial Interaction, Pedro Davila-Rosado

Electronic Theses and Dissertations

Parasocial interaction is the name that Horton & Wohl coined to describe a viewer's attachmentent toward onscreen persona that they had never physically interacted with (1956). A. Rubin, Perse, & Powell (1985) continued the research and created the Parasocial Interaction Scale. The scale has become the standard in gauging parasocial interaction in various forms of media from soap operas to newscasts. The purpose of this study was top examine parasocial interaction and see if the concept could be applied to the current television trend of reality television. Simultaneously, the study also examined parasocial interaction and its possible connections to loneliness, …

A Social Cognitive Approach Towards Understanding The Effects Of Popular Poker Television Shows On College Students, Marc Londo

Electronic Theses and Dissertations

Tournament poker shows have become a leading ratings draw on American television. Since ESPN and the Travel Channel began airing their innovative poker shows in 2003, the game has reached a new following, particularly among college students. There are unique and psychologically significant factors that characterize the college population that make students particularly receptive to popular characterizations in media. This study investigates the potential exacerbating effect that these widely popular poker television shows have on the gambling behavior of college students. 444 college students completed a survey designed to assess gratifications sought through media along with measures of attitudes, gambling …

Identifying Factors That Influence Gender Disparities In Physician Income: Implications For Public Policy, Wendy Bolyard

Electronic Theses and Dissertations

Research has shown that female physicians continue to earn less than their male counterparts. From both social justice and feminist perspectives, laws requiring equal pay should provide just income for females as compared to males. However, the literature continues to indicate that in general females earn less than males, a trend that is also true for physicians. Theoretically informed postulates are measured here with structural equation modeling to test the influence of the unique latent construct "specialization" on the income gap while controlling for demographic and contextual variables. The analysis tests the assumption that the influence of specialization is the …

Phospholipase A2mechanism Of Interfacial Activation,An Interdiscliplinary Approach, Kathleen N. Nemec

Electronic Theses and Dissertations

Phospholipase A2 (PLA2) is an enzyme that hydrolyzes the sn-2-ester bond of membrane phospholipids and liberates arachidonic acid, which is converted to eicosanoids that act as potent mediators of inflammation and allergy. As such this enzyme plays a crucial role in many homeostatic physiological and immunologic processes and disease progression. PLA2s undergo substantial increase in activity upon binding to cellular membranes. This effect of interfacial activation is well recognized, yet its structural and physical aspects are poorly understood. In this work, we have employed the interdisciplinary methods of molecular biology, biochemistry, biophysics, bioinformatics and computational biology, in order to elucidate …

Size And Power Property Of The Asymptotic Tests And The Bootstrap Tests In The Probit Model: Simulation Results, Xiaobin Shen

Electronic Theses and Dissertations

This paper compares the size and power properties of the asymptotic tests based on the asymptotic standard errors with the bootstrap tests based on the bootstrap confidence interval in the Probit model. The asymptotic tests work surprisingly well even when the sample size is quite small (e.g., n = 30) for the test of exclusion hypothesis β = 0. The bootstrap tests work similarly well. It shares essentially the same size and power property of the asymptotic tests when the null hypothesis is β = 0. However, the small sample probit estimators can be seriously biased when β/σ is large. …

Media Influence On Young Adults Sexual Attitudes And Behaviors, Heather Hackbarth

Electronic Theses and Dissertations

Research has shown that sexual content is prevalent in television programming and that this content can have an effect on the viewer's attitudes about sex. This study examined this relationship within the theoretical framework of cultivation and social cognitive theories. This study used a survey to examine these relationships in young students at a large southeastern university. The researchers targeted freshmen, many in their first semester, for this study to get the best measure of attitudes, before they were influenced by college life. In addition to examining the effects of television viewing, the researcher looked at the effects of exposure …

Wikipdf - A Tool To Help Scientists Understand The Literature Of The Biological, Health, And Life Sciences, David Calloway

Electronic Theses and Dissertations

Biological sciences literature can be extraordinarily difficult to understand. Papers are commonly filled with terminology unique to a particular sub-discipline. Readers with expertise outside that sub-discipline often have difficulty understanding information the author is trying to convey. The WikiPDF project that is the subject of this thesis helps readers understand the biological sciences literature by automatically generating a customized glossary for each page of any technical paper available in Adobe Portable Document Format (PDF) format. WikiPDF relies on the Wikipedia®, an on-line encyclopedia created and supported by a host of volunteers, as a source of definitions used in its glossaries. …

On Prime Generation Through Primitive Divisors Of Recurrence Sequences, Richard Russell

Electronic Theses and Dissertations

We examine results concerning the generation of primes in certain types of integer sequences. The sequences discussed all have a connection in that each satisfies a recurrence relation. Mathematicians have speculated over many centuries that these sequences contain an infinite number of prime terms, however no proof has been given as such. We examine a less direct method of showing an infinitude of primes in each sequence by showing that the sequences contain an infinite number of terms with primitive divisors.

Dogs In A Village, Karen Porter

Electronic Theses and Dissertations

Nearly all of the histories of Shays's Rebellion point to debt as the reason why farmers in western Massachusetts rose against the courts and the state government in the fall and winter of 1786-87. Recent scholarship demonstrates a new line of reasoning based on the tax records of those involved. The following thesis, a screenplay, offers a fictional telling of this insurgency. The story is told using language pulled from contemporary letters and documents and follows a line of causation pointing to inequitable state tax structure and poor representation as the provocation. The response that ensued was not a rebellion …

Transferring Juveniles To The Adult Court: A Factorial Survey Of Florida Prosecutors, Robin King

Electronic Theses and Dissertations

Prosecutors have enormous discretion in the criminal justice system. Their decisions can ultimately impact and shape the course of the lives of the offenders whom they prosecute. This is certainly true for juvenile offenders considered for transfer to the adult court. Previous research indicates that serious, violent offenders are the most likely to be transferred to the adult court. However, very little is known on prosecutors' views of the role of the juvenile court, the process of transfer or the facts that influence their decision to transfer a juvenile to the adult court. A statewide survey of 800 Florida prosecutors …

The Sociopolitical Construction Of Race And Literary Representations Of The Biracial Subject, Kara Fontenot

Electronic Theses and Dissertations

Twentieth-century American literature incorporates interracial and biracial themes that bring to light the often unnamed and unrecognized biracial identities of many Americans. Unfortunately, despite the potential value for a deeper understanding of the construction of race, these themes have seldom been seriously considered in the context of reevaluating the nature of the system that creates racial labels and categories until the recent emergence of postmodern critical theories. This thesis examines the black-white interracial themes and biracial protagonists in Nella Larsen's Quicksand (1928) and Danzy Senna's Caucasia (1998) in order to explore the texts' representations of systems of hegemonic power that …

Property Rights As A Precondition To Development: A Case Study Of Jamaica, Leah Kral

Electronic Theses and Dissertations

Emerging research suggests that property rights play a significant role in the economic and social development of nations. To test this proposition, this study examines the case of Jamaica and whether there is a relationship between property rights and development. In order to carry out this investigation, this study gathers and analyzes existing research to:

1. define the extent that Jamaicans lack property rights and how this affects their everyday quality of life and vulnerability to poverty;

2. examine the relationship between the absence of property rights and underdevelopment; and

3. explore how the current international and local Jamaican policy …

Interprofessional Collaboration Between Criminal Justice And Mental Health Practitioners Regarding Mentally Ill Offenders: Perception Of Collaboration, Christopher Sharp

Electronic Theses and Dissertations

The federal program of deinstitutionalizing psychiatric facilities has resulted in a well documented, ever-increasing mentally ill population in the nation's prisons and jails. Historically, the criminal justice system has maintained a laissez-faire attitude toward the mentally ill, and only became involved with the mentally ill when a crime had been committed. As such, the President's Mental Health and Criminal Justice Consensus Project was developed to explore ways that the two systems could work together to address the growing problem of the mentally ill offender. However, challenges arise because the criminal justice system has typically been viewed as a loosely coupled, …

Myspace Or Ourspace: A Media System Dependency View Of Myspace, Andrew Schrock

Electronic Theses and Dissertations

MySpace is a type of "social networking" website where people meet, socialize, and create friendships. The way MySpace members, particularly younger individuals, interact online underscores the changing nature of mass media. Media system dependency states that individuals become reliant on media in their daily life because of fundamental human goals. This reliance, termed a dependency, leads to repeated use. Media system dependency was applied in the current study to explain how and why individuals became habitual MySpace users. To attain results a survey was administered to a convenience sampling of 401 adult undergraduates at the University of Central Florida. Members …

The Effects Of Secondary Task Demandon The Assessment Of Threat, Harriss Ganey

Electronic Theses and Dissertations

Threat perception is an important issue in today's world. As the line between hostile and non-hostile entities is blurred, it becomes more important for individuals to clearly distinguish between those who would present danger and those who would not. This series of experiments tested whether observers engaged in a dual-task paradigm perceived a greater amount of threat from target stimuli than they did when they were engaged in the threat task alone. The first experiment revealed that observers rated targets as more threatening when they were engaged in the additional task than when they only rated the targets themselves. Response …

Notopleural Mutations Enhance Defects In Imaginal Disc Epithelial Morphogenesis And Macrochete Elongation Associated With Mutations In The Stubble-Stubbloid Locus, Robert Ruggiero

Electronic Theses and Dissertations

The Stubble-stubbloid locus encodes a transmembrane serine protease (Stubble) necessary for the proper formation of sensory bristles, and the morphogenesis of leg and wing epithelia. Genetic and cell biological analysis indicate a role for Stubble in actin cytoskeletal dynamics and cell shape changes in developing epithelia and bristles. Previously reported genetic interactions between Stubble and the Rho1 signaling pathway suggest Stubble influences actin cytoskeleton dynamics in developing imaginal discs through interactions with the Rho1 pathway. This work will discuss a genetic screen conducted to further investigate the role of Stubble in bristle and imaginal disc morphogenesis. From 50,000 EMS-mutagenized chromosomes …

Classroom Observation Of Children With Adhd And Their Peers: A Meta-Analytic Review, Michael Kofler

Electronic Theses and Dissertations

Meta-analysis of 23 between-group direct observation studies of children with ADHD and typically developing peers indicates significant deficiencies in children with ADHD's ability to pay attention in classroom settings. Comparison with 59 single case design studies of children with ADHD suggests generalizability of between-group comparisons. Weighted regression analysis determined that several methodological differences – sample characteristics, diagnostic procedures, and observational coding schema – have significant effects on observed levels of attentive behavior in the classroom. Best case estimation indicates that after accounting for these factors, children with ADHD are on-task approximately 65% of the time compared to 85% for their …

Object Association Across Multiple Moving Cameras In Planar Scenes, Yaser Sheikh

Electronic Theses and Dissertations

In this dissertation, we address the problem of object detection and object association across multiple cameras over large areas that are well modeled by planes. We present a unifying probabilistic framework that captures the underlying geometry of planar scenes, and present algorithms to estimate geometric relationships between different cameras, which are subsequently used for co-operative association of objects. We first present a local1 object detection scheme that has three fundamental innovations over existing approaches. First, the model of the intensities of image pixels as independent random variables is challenged and it is asserted that useful correlation exists in intensities of …

Polymer-Derived Si-Al-C-N Ceramics:Oxidation, Hot-Corrosion, And Structural Evolution, Yiguang Wang

Electronic Theses and Dissertations

Polymer-derived ceramics are a new class of materials synthesized by thermal decomposition of polymer precursors. Previous studies have shown that the materials exhibit excellent thermo-mechanical properties and can be stable at temperatures up to 2000oC. Furthermore, the novel polymer-to-ceramics process enables the manipulation of the ceramic structures at the atomic/nano level by designing the chemistry of polymer precursors and controlling the pyrolysis conditions, thereby, the properties of ceramics. In this dissertation, oxidation/hot-corrosion behavior and the structural evolution of Si-Al-C-N ceramics have been studied. The structural evolution and crystallization behavior of the SiCN and SiAlCN ceramics are investigated using FT-IR, XRD, …

Saudi Arabia And Expansionist Wahhabism, Samiah Baroni

Electronic Theses and Dissertations

This thesis examines the development of Wahhabism as an ideology into a rapidly expanding, transportable, contemporary Islamic political system. Serving as the territorial foundation, individuals maintain allegiance to Makkah, the center of the Islamic world, through symbolic Islamic prayer. Along with a central, globally financed economic distributive mechanism, and Wahhabi social and educational institutions emerging from the traditional mosque, Wahhabism serves the demand for an Islamic political system in a late capitalist world. Wahhabism is fluid within contemporary dynamic political systems and rapidly changing international relations. Wahhabism continues to expand at a global level, at times, providing a foundation for …

Unified Steady-State Computer Aided Model For Soft-Switching Dc-Dc Converters, Wisam Al-Hoor

Electronic Theses and Dissertations

For many decades, engineers and students have heavily depended on simulation packages such as Pspice to run transit and steady-state simulation for their circuits. The majority of these circuits, such as soft switching cells, contain complicated modes of operations that require the Pspice simulation to run for a long time and, finally, it may not reach a convergent solution for these kinds of circuits. Also, there is a need for an educational tool that provides students with a better understanding of circuit modes of operation through state-plan figures and steady-state switching waveforms. The unified steady-state computer aided model proposes a …

A Compartive Analysis Of The Evolution Of Forest Management In The United States In General, With A Focus On Oregon, North Carolina, Patrick Kelly

Electronic Theses and Dissertations

The purpose of this paper is to evaluate and discuss the evolution of forest management practices in the United States. The paper discusses the trends in forest management that have occurred within the United States in general, and specifically within the western (Oregon) and southern (North Carolina and Florida) United States. The trends discussed include the three (3) to four (4) epochs of management and use that are generally accepted within the forest management literature, with the exception of North Carolina that is in the process of a fifth (5). The comparative analysis within the paper discusses the western model …

The Adjudication Of Presidential Power In The U.S. Supreme Court:A Predictive Model Of Individual Justice Voting, Todd Curry

Electronic Theses and Dissertations

The interaction between the President and Congress is many times quite public and well documented (Cronin 1980; Covington et al. 1995; Fisher 1994; Schlesinger 2004). Similarly, relations between the Congress and the Supreme Court are well documented; Congress makes law and, if requested, the Court interprets it. The interaction between the president and the Court, however, is not nearly as well defined, and certainly not as public. Supreme Court cases involving the president directly are fairly rare. King and Meernik (1995) identify 347 cases involving the foreign policy powers of the president, decided from 1790 to 1996, which is roughly …

College Drinking, Greek Affiliation And The Need To Fit In: An Analysis Of Social Norms And Motivations Associated With Fraternity And Sorority Binge Drinking, Chantel Dufrene

Electronic Theses and Dissertations

This study proposes that members of Greek social organizations have higher rates of binge drinking as compared to other college students due to their greater acceptance of norms and motives that support binge drinking. The College Alcohol Study, a survey conducted by the Harvard School of Public Heath, was administered to 10, 904 university students. The survey measured various aspects of students' experiences at their respective universities including experiences with and perceptions of alcohol use. Logistic regression analysis was used to determine normative and motivational predictors of binge drinking for Greek and non-Greek students. The results show that Greek members …

Mapping And Characterization Of 18-5 And 12-5, Genes Which Potentially Link The Rhoa Signaling Pathway To The Ecdysone Response, Samuel Fox

Electronic Theses and Dissertations

Systemic steroid hormone and intracellular signaling pathways are known to act cooperatively during the development of vertebrate and invertebrate epithelia. However, the mechanism of this interaction is poorly understood. Morphogenesis of Drosophila leg imaginal disc epithelia is regulated both by the steroid hormone 20-hydroxyecdysone (ecdysone) and the RhoA GTPase signaling pathway. Recent evidence suggests that these pathways act cooperatively to control imaginal disc morphogenesis. Thus, leg imaginal disc morphogenesis is an excellent system in which to study the interaction of steroid hormone and intracellular signaling pathways. We have identified mutations in three genes, 12-5, 18-5, and 31-6, with roles in …

Simplified Low Copy Number Dna Analysis By Post Pcr Purification, Pamela Smith

Electronic Theses and Dissertations

Frequently evidentiary items contain an insufficient quantity of DNA to obtain complete or even partial DNA profiles using standard forensic gentotyping techniques. Here, various methods of post PCR purification were evaluated for their effects on the sensitivity of fluophore-based allelic detection. A method of post PCR purification is described which increases the sensitivity of standard 28 cycle PCR such that low copy number DNA templates (<100 pg DNA) can be analyzed. Full profiles were consistently obtained with as little as 20 pg template DNA without increased cycle number. In mock case type samples with dermal ridge fingerprints, genetic profiles were obtained by amplification with 28 cycles followed by post-PCR purification whereas no profiles were obtained without purification of the PCR product. Allele drop-out, increased stutter, and contamination (allele drop-in) typical of LCN analysis were observed. A single incident of contamination was observed in a reagent blank (not duplicated upon re-amplification) however, no contamination was observed in negative amplification controls.

A Derivation Of An Empirical Equation For Estimating The Acoustical Shadow Zone Length Of Roadway Noise Barriers, Wayne Arner

Electronic Theses and Dissertations

The objective of this research was to derive an empirical equation that estimates the acoustical shadow zone length (SZL) of roadway noise barriers. The acoustical shadow zone is the area behind a noise barrier of reduced sound levels, generally to some stated level at or near background. The ability to predict the SZL can be used as a method to evaluate the performance, and possibly the design, of roadway noise barriers. The current federally required roadway noise model is the Federal Highway Administration (FHWA) Traffic Noise Model (TNM). TNM uses insertion loss (IL) to evaluate the effectiveness of a barrier. …