Digital Commons Network^™

Image Quality Analysis Using Glcm, Dhanashree Gadkari

Electronic Theses and Dissertations

Gray level co-occurrence matrix has proven to be a powerful basis for use in texture classification. Various textural parameters calculated from the gray level co-occurrence matrix help understand the details about the overall image content. The aim of this research is to investigate the use of the gray level co-occurrence matrix technique as an absolute image quality metric. The underlying hypothesis is that image quality can be determined by a comparative process in which a sequence of images is compared to each other to determine the point of diminishing returns. An attempt is made to study whether the curve of …

Molecular Typing Of Mycobacterial Isolates Cultured From The Tissue Of Inflammatory Bowel Disease (Crohn's Disease) Patients, Leanne M. Adams

Electronic Theses and Dissertations

The role of Mycobacterium avium subsp paratuberculosis (MAP) in the etiology and pathogenesis of inflammatory bowel disease (IBD) including Crohn's Disease (CD), has been investigated. The fastidious characteristics and cross reactivity of MAP with other members in Mycobacteria have produced significant challenges in their detection and identification. In this two year pilot study, an array of three PCR molecular assays based on the detection of sequences from the16S rRNA, IS1245, and IS900 genes, belonging to members of the MAC, have been developed and optimized into a common protocol to be used as a rapid and accurate diagnostic tool regarding M. …

Morpheme Acquisition In Second Language Learners, Timothy Andrew Schuwerk

Electronic Theses and Dissertations

This study explored morpheme acquisition in learners of English as a Second Language (ESL). Specifically, it looked at the development of eight selected individuals from Korea over the course of an intensive 8-week instruction program and tracked their acquisition of three specific English morphemes: indefinite articles used with singular count nouns, progressive -ing forms, and third person -s markers. The individuals were given an assessment test to place them at the correct level within the program prior to their selection for the study. The participants provided four sets of data in the form of writing samples at fixed intervals during …

Do You Have A Friend?: The Impact Of Personal Knowledge Of Someone With Aids On Attitudes Towards Aids, Leith Leonce Lombas

Electronic Theses and Dissertations

The study of attitudes towards those with AIDS is relatively recent. Most studies have examined attitudes concerning health and medical concerns. Little research has focused on attitudes toward social and behavior concerns. The few that have focused on such attitudes have employed relatively small samples collected primarily out of convenience. The studies that have used national samples have primarily addressed public policy issues. Using national data from the 1988 General Social Survey, this paper examines the effects of personal knowledge about the AIDS virus and other attitudinal variables on four dimensions of social and behavioral concern for those with AIDS …

The Use Of Filters In Topology, Abdellatif Dasser

Electronic Theses and Dissertations

Sequences are sufficient to describe topological properties in metric spaces or, more generally, topological spaces having a countable base for the topology. However, filters or nets are needed in more abstract spaces. Nets are more natural extension of sequences but are generally less friendly to work with since quite often two nets have distinct directed sets for domains. Operations involving filters are set theoretic and generally certain to filters on the same set. The concept of a filter was introduced by H. Cartan in 1937 and an excellent treatment of the subject can be found in N. Bourbaki (1940).

Interactions Between The Nudibranch Okenia Zoobotryon And Its Bryozoan, Nicole Robinson

Electronic Theses and Dissertations

In the Indian River Lagoon, the nudibranch Okenia zoobotryon and its egg masses are found attached to the bryozoan Zoobotryon verticillatum throughout the year. Okenia zoobotryon is thought to live, feed, and reproduce exclusively on Z. verticillatum, which would make this a very specialized predator-prey interaction. The primary goal of my study was to document certain aspects of the ecological and chemical relationships between Z. verticillatum and O. zoobotryon. Specifically, I wanted to understand the cues used by the nudibranch to locate and remain on Z. verticillatum. Population surveys on Z. verticillatum, as well as other potential hosts, were performed. …

Extracullular Atp Regulates Il-1beta Release From Microglial Cells Via Purinergic Receptor After In Vitro Trauma, Chengya Liang

Electronic Theses and Dissertations

Traumatic brain injury (TBI) induces a state of microglialactivation, which includes upregulation of macrophage functions and release inflammatory mediators such as certain inflammatory cytokines. Current literature suggests that interleukin-1Beta is an important cytokine mediator, which is dramatically increased after brain injury. Previous studies indicate that ATP is released by traumatically injured astrocytes and serves as a cell-to-cell mediator through purinergic receptors after in vitro injury. However, the mechanism of interleukin-1Beta release after traumatic brain injury remains poorly defined and is difficult to study using in vivo models. Using an in vitro model for traumatic brain injury (cell strain or stretch), …

Nursing Leadership Characteristics: Effect On Nursing Job Satisfactio, Sandra Swearingen

Electronic Theses and Dissertations

The purpose of this research is to determine the degree to which a positive experience with nursing leadership increases nurse's job satisfaction. The different values and norms of the generational cohorts result in each cohort perceiving leadership characteristics differently. Factors such as length of exposure to leadership, location, shift worked, clinical versus non-clinical positions and the presence or absence of Servant-Leadership, all have the potential to impact nursing satisfaction. Nursing satisfaction, or dissatisfaction impacts retention, further modifying nursing leadership practices. Conflict, Cohort, Servant-Leadership, and Self-Discrepancy theories were utilized to identify the relationships of generations to each other and to the …

Trackers, Robin Rozanski

Electronic Theses and Dissertations

Trackers is a collection of short stories that attest to the oddities and complexities found even in the non-exotic middle-class American suburbs. The characters in these stories experience disappointments that result from the physical and emotional distancing of families. In "Tokens," a woman's attempts at revenge on her cheating husband are unsatisfying because she ends up feeling more alone than before. In "Trackers," eleven-year old Richard hunts for Bigfoot as he and his family cope with the emotional aftermath of his sister's suicide attempt. In these stories people struggle to maintain normalcy in their lives--sometimes through inappropriate means. When their …

The Impact Of Traditional Shona Beliefs On Hiv/Aids Intervention Work In Zimbabwe, Brian Goercke

Electronic Theses and Dissertations

This study examined the relationship between secondary students in the rural and peri-urban areas of Mashonaland in Zimbabwe and their tendencies to agree or disagree with traditional Shona attitudes, beliefs and practices as they related to the HIV/AIDS pandemic. A convenience, cluster sample was used to identify the 482 students who participated in this study. A questionnaire composed of demographics, hypothetical and open-ended questions was administered to these students within the regular classrooms of their respective schools.

A notable finding in this study was that traditional Shona beliefs appear to be stronger in the rural areas. However, the students surveyed …

The Importance Of Cmos Sensor Surface Topography In The Attachment, Proliferation, And Differentiation Of Human Adult Mesenchymal Stem Cells, Christa Y. Heyward

Electronic Theses and Dissertations

Osteoblasts and osteoblast precursor cells (mesenchymal stem cells) respond to the surface topography of metal implants by aligning along surface features in order to minimize shear stress. While several previous studies have investigated the morphology, attachment and proliferation of both osteoblasts and mesenchymal stem cells along grooved surfaces, the current study investigates the cellular response to depressions and peaks in surface topography, as well as surfaces that contain alternating combinations of depressions and peaks. The Complementary Metal Oxide Semiconductor (CMOS) sensor is a transducer fabricated from silicon and sputter coated with titanium. The CMOS sensor is designed to utilize piezoresistive …

Analysis Of Specific Cis-Acting Dna Sequences Of The Himar1 Mariner Transposon, Beth Berta

Electronic Theses and Dissertations

Himar1, found in the horn fly Haematobia irritans, belongs to the mariner family of transposable elements. Mariners are a diverse and widespread family of eukaryotic transposons that transpose via a cut-and-paste mechanism. Mariner transposition not only requires the transposase, but also specific cis-acting DNA sequences known as inverted terminal repeats (ITRs). Very little is known about the fine structure of mariner ITRs, particularly which bases are important for transposition. A mariner family ITR sequence logo representing 20 different mariners from six different subfamilies suggests that more conserved regions of the logo are required for transposase binding while the more variable …

Plato's Villains: The Ethical Implications Of Plato's Portrayal Of Alcibiades And Critias, John Baynard Woods Jr.

Electronic Theses and Dissertations

Plato presents Socrates as an ethical example and a political warning. Other characters serve other philosophical functions. Alcibiades--the worst man in the democracy--and Critias--the worst in the oligarchy--are the most notorious characters.. This dissertation argues that Plato uses these characters in order to open a diachronic dimension in the synchronic accounts of the dialogues. This dimension turns historical characters into paradigmatic characters and allows the reader to evaluate the accounts people give in terms of the lives that they lead. In order to make a case for philosophy, Plato needs to make it clear that bad accounts have negative ethical …

Outcomes Of The American Occupational Therapy Foundation's Curriculum-Mentoring Project, Ingrid Mary Provident

Electronic Theses and Dissertations

This study investigated the outcomes of a year long formal curriculum-mentoring project sponsored by the American Occupational Therapy Foundation. Five occupational therapy faculty groups were selected through a competitive application process and paired with mentors to assist in curriculum change. The experiences of each of the teams were studied using multiple methods of data collection, including semi-structured interviews conducted in person and via telephone, a mailed questionnaire, and bi-monthly electronic journal entries. The process and outcomes of two representative cases are reported in this qualitative, critical case study analysis. A two part content analysis yielded information that addressed each of …

Critical Digital Infrastructure Protection: An Investigatoin Into The Intergovernmental Activities Of Information Technology Directors In Florida Counties, Joah Nicole Devenny

Electronic Theses and Dissertations

As cyber attacks become more sophisticated, the risk to all networked computer systems increases. Whether public or private, whether federal, state, or local, the threat is equally real. Consequently, local governments must respond accordingly to understand the threats, take measures to protect themselves, and determine how to respond in the event of a system breach. Additionally, since cyber criminals do not respect geographic or administrative boundaries, local leaders must be prepared to instantly interact with other governments, agencies, and departments to suppress an attack. Guided by the theory of intergovernmental management (IGM), this exploratory research investigated how Information Technology (IT) …

Improving Comprehension Of Capital Sentencing Instructions: A Bias Reduction Approach, Charles W. Otto

Electronic Theses and Dissertations

Previous research has demonstrated that judicial instructions on the law are not well understood by jurors tasked with applying the law to the facts of a case. The past research has also shown that jurors are often confused by the instructions used in the sentencing phase of a capital trial. Social scientists have used two different methods to improve juror understanding of legal instructions, psycholinguistic rewrites and bias-reduction techniques. Psycholinguistic rewrites of legal instructions have been shown consistently to improve juror comprehension of general legal instructions and instructions used in the sentencing phase of a capital trial, however, there has …

Macmahon's Master Theorem And Infinite Dimensional Matrix Inversion, Vivian Lola Wong

Electronic Theses and Dissertations

MacMahon's Master Theorem is an important result in the theory of algebraic combinatorics. It gives a precise connection between coefficients of certain power series defined by linear relations. We give a complete proof of MacMahon's Master Theorem based on MacMahon's original 1960 proof. We also study a specific infinite dimensional matrix inverse due to C. Krattenthaler.

The Removal Of Motion Artifacts From Non-Invasive Blood Pressure Measurements, Paresh Thakkar

Electronic Theses and Dissertations

Modern Automatic Blood Pressure Measurement Techniques are based on measuring the cuff pressure and on sensing the pulsatile amplitude variations. These measurements are very sensitive to motion of the patient or the surroundings where the patient is. The slightest unexpected movements could offset the readings of the automatic Blood Pressure meter by a large amount or render the readings totally meaningless. Every effort must be taken to avoid subjecting the body of the patient or the patient's surroundings to motion for obtaining a reliable reading. But there are situations in which we need Blood Pressure Measurements with the patient or …

Neural Networks Satisfying Stone-Weiestrass Theorem And Approximating, Pinal Thakkar

Electronic Theses and Dissertations

Neural networks are an attempt to build computer networks called artificial neurons, which imitate the activities of the human brain. Its origin dates back to 1943 when neurophysiologist Warren Me Cello and logician Walter Pits produced the first artificial neuron. Since then there has been tremendous development of neural networks and their applications to pattern and optical character recognition, speech processing, time series prediction, image processing and scattered data approximation. Since it has been shown that neural nets can approximate all but pathological functions, Neil Cotter considered neural network architecture based on Stone-Weierstrass Theorem. Using exponential functions, polynomials, rational functions …

Vitellogenin Induction As A Biomarker For Environmental Estrogens In Xenopus Laevis, Jamie Skoloda

Electronic Theses and Dissertations

In oviparous vertebrates, estrogen stimulates the liver to produce vitellogenin. Vitellogenin induction is a useful biomarker for exposure to endocrine disruptors, specifically environmental estrogens. The objective of this project was to design in vivo bioassays for environmental estrogens based on induction of vitellogenin in male Xenopus laevis. Frogs were exposed to ethinyl-estradiol by injection or immersion for different times and doses, than vitellogenin induction was assessed. An ELISA was developed to measure serum vitellogenin. Additionally, a vitellogenin rt-PCR assay was developed using species-specific vitellogenin primers, to detect mRNA induction. It was established that the induction of serum vitellogenin and hepatic …

Raindrop Size Distribution Retrieval And Evaluation Using An S-Band Radar Profiler, Fang Fang

Electronic Theses and Dissertations

Vertical pointing Doppler radar profilers are used to explore the vertical structure of precipitation cloud systems and to provide validation information for use in weather research. In this thesis, a theoretical radar rain-backscatter model was developed to simulate profiler Doppler spectra as a function of assumed rain parameters, of which the raindrop size distribution (DSD) is the fundamental quantity used to describe the characteristics of rain. Also, profiler observations during stratiform rain are analyzed to retrieve the corresponding rain DSD’s. In particular, a gamma distribution model is introduced, which uses Rayleigh scattering portion of the Doppler velocity spectrum to estimate …

Analysis Of Factors That Influence Member Turnover In A Health Insurance Plan, Sara Bennett

Electronic Theses and Dissertations

In this research, we implement a multiple logistic regression model in which the coefficients of indicator variables are constrained to be zero or positive. By doing this, the contribution of each variable to the failure probability can be assessed. Due to this restriction on the coefficients, a Bayesian approach to parameter estimation--which assigns mixture priors to the coefficients--is taken. The data is provided by a large health insurance company in Western Pennsylvania and includes the enrollment status and corresponding values of the 84 predictor variables for 1,280,612 individuals. The insurer feels the analysis is needed to determine why its membership …

Faith-Based Organizing And Partnerships In A Pittsburgh Neighborhood: A Look At East Liberty, Damon Bethea

Electronic Theses and Dissertations

The East Liberty neighborhood of Pittsburgh has a fascinating blend of African American churches and racially integrated churches -- all within this African American neighborhood in Pittsburgh's East End. In this research project, I will explore how several East Liberty churches are working with other churches (or faith-based organizations [FBOs]) and organizations within the East Liberty neighborhood to provide various social services to those within this predominantly African American community. The research questions for this project are: 1) How does the racial composition of the church community affect their relationship with the residents of East Liberty whom they serve? 2) …

A Historical Study Of The Emergence Of Social Movements: Case Study Of The Sierra Leone Women's Forum In The 1990s, Agnes Mariama Farma

Electronic Theses and Dissertations

The emergence of the Women's Forum during the 1990's in Sierra Leone is analyzed using the political process model proposed by Douglas McAdam. The strength of the indigenous organizations, the political opportunities presented by the civil strife of the period and the emergence of insurgency consciousness on the part of the women of Sierra Leone were identified as significant in contributing to the success of the movement in bringing an end to the civil war and influencing the peace process to address women's issues, indicating the usefulness of this model in analyzing the emergence of social movements in the Sierra …

Identification Of Protein Interaction Between The Drosophila Runx1 Transcription Factor Lozenge And Ets-1 Factor Pointed Using Site Directed Mutagenesis And Yeast Two-Hybrid Analysis, Shalini Singh

Electronic Theses and Dissertations

Many classes of transcriptional regulatory proteins are known to function in both cell proliferation and differentiation. Runx1 proteins one such family of transcription factors, plays critical roles in hematopoiesis, osteogenesis and leukemogenesis and act as promoter organizers that cooperate with other transcription factors such as Ets-1 in the regulation of gene activation or repression. Genes that are regulated by the Runx1-Ets1 complex, frequently have multiple, adjacent consensus binding sites in their promoters. I have investigated a similar interaction in developing fly eye. Lozenge (DmRunx1) and Pointed P2 (DmEts-1) cooperate to upregulate expression of prospero, which has multiple Lz and Ets …

Defining The Church's Advocacy Role To The Modern Prison System, Timothy Swope

Electronic Theses and Dissertations

This dissertation, "Defining the Church's Advocacy Role to the Modern Prison System," is developed from the Catholic Church's social thought over the past century and the episcopal teaching of the American bishops over the past three decades. Chapter one reviews the concept of 'advocate' and the Church's advocacy role to the poor, oppressed, and marginalized. Chapter two reviews the episcopal statements concerning the advocacy role to the prisons and the question of the death penalty in general.

Before defining the specific role of the Church to the prison system, this role of advocacy must deal with the question of Church …

The New Girl, Angela Marie Meredith

Electronic Theses and Dissertations

The New Girl is a collection of poems in which the poet assumes a direct, unfeigned voice. These rhythmic poems cover the deeply personal to the universal and social. The body is presented as a record of experiences both good and bad. Feminist issues pertainingto marriage, work, and sexuality are explored. Whether the poem is about a personal relationship or some aspect of society, it is likely to be multi-dimensional and suggest a duality. Overall, the poems are rooted in the spiritual and attempt to relate, with holistic honesty, a sense of reverence for the impure parts of life.

Genre And Persona In Activist Websites, Margaret M.F. Boreman

Electronic Theses and Dissertations

Digital texts present significant challenges to technical communicators in terms of genre and persona. Because of the ubiquity of electronic media, we increasingly embrace digital formats over print-based documents. As a result, technical communicators must now devise the means to cue audiences to the purposes of digital documents in any given discourse community. We can only convey meaning to our Internet audiences through the use of appropriate standards and elements recognizable generic forms and rhetorical cues that we designate as conventions in specific digital discourse. Just as we use file and folder office metaphors for information stored on computers, digital …

Techniques For Assessing And Improving Performance In Navigation And Wayfinding Using Mobile Augmented Reality, Brian Goldiez

Electronic Theses and Dissertations

Augmented reality is a field of technology in which the real world is overlaid with additional information from a computer generated display. Enhancements to augmented reality technology presently support limited mobility which is expected to increase in the future to provide much greater real world functionality. This work reports on a set of experiments that investigate performance in search and rescue navigating tasks using augmented reality. Augmentation consisted of a spatially and temporally registered map of a maze that was overlaid onto a real world maze. Participants were required to traverse the maze, answer spatially oriented questions in the maze, …

Survival Of Mycobacterium Avium Subspecies Paratuberculosis In The Pol, John Rumsey

Electronic Theses and Dissertations

Mycobacterium avium subspecies paratuberculosis (map) is an intracellular pathogen that is known to parasitize macrophages and monocytes. Map infiltrates gastrointestinal tract host tissue where it is the known etiological agent of johne's disease in ruminants and implicated in the etiology of crohn's disease in humans. Map's ability to survive within macrophages enables it to disseminate throughout the rest of the host, possibly infecting other circulating blood leukocytes. In this study, the survival and fate of map strain atcc 43015 (human isolate) following phagocytosis was determined using in vitro murine macrophage cell line j774a.1 and polymorphonuclear cells (pmnc's) from five crohn's …