Digital Commons Network^™

Migration Of An Intruder Particle In A Boundary Driven Shear Flow, Jian Liu

Dissertations

This study reports on three-dimensional, discrete element simulations of a single large spherical intruder in a Couette shear flow composed of uniform sized particles. The simulation results are useful in providing a numerical reproduction of the experiments for size segregation and mixing. This in turn has a major importance in many industries which are concerned with handling of particles and powders, such as pharmaceutical manufacturing, agriculture, chemical and mineral processing.

Discrete element simulations are carried out using the "soft sphere" model of Walton, et. al., which provides a method for obtaining the information at a macroscopic level from multi-body collisions …

The Use Of A Water Quality Model To Evaluate The Impacts Of Combined Sewer Overflows On The Lower Hudson River, Wen-Pin Shu

Dissertations

CSO discharges have long been recognized as a significant source of water pollution. While many sources of water pollution have been controlled over the past 20 years, CSOs continue to be a main environmental concern in several areas, especially in old cities. In the past, most CSO research focused on the CSO control processes, including floatables and suspended solids removal. Few studies have been conducted in the area of the impacts of CSO discharge on the receiving water quality. To achieve this purpose, a powerful water-modeling tool, WASP 6.1, is utilized in this study. The Lower Hudson River is selected …

The Impacts Of Delphi Communication Structure On Small And Medium Sized Asynchronous Virtual Teams, Hee-Kyung Cho

Dissertations

The improvement of Internet technology has motivated distributed work groups to collaborate without meeting face to face. Although asynchronous meetings through Web-based group communications systems enable groups dispersed temporarily and geographically to collaborate more flexibly, parallel and non-linear communication among dispersed members also challenge effective and efficient group coordination. Moreover, the Web-based asynchronous meeting is distinguished not only from the face-to-face meeting but also from the synchronous computer-supported meeting in terms of coordination process. However, previous asynchronous group communications or virtual team research focused more on the comparison of this new type of meeting with the face-to-face meeting. Not many …

A Dictionary Of Middle Egyptian For Students Of Biblical Archaeology And Old Testament Studies, Robert D. Bates

Dissertations

Problem. Middle Egyptian has played an increasingly important role in Biblical Archaeology and Old Testament studies. Much of biblical chronology is closely connected to Egyptian chronology; many biblical events record Egyptian involvement, and some of these are included on Egyptian monuments. A knowledge of Middle Egyptian has been crucial in understanding the historical background and cultural context of the biblical world because this phase of the Egyptian language influenced the widest range of Egyptian writing, particularly as it pertains to Old Testament history. Unfortunately, students do not have all the necessary tools for searching for unfamiliar words in Middle Egyptian. …

Leaders' Influence On School Reculturing: A Case Study Of An International School, Brian C. Matthews Edd

Dissertations

Organizational theorists and even practitioners are beginning to use the construct of organizational culture to analyze and characterize the complexities and challenges of organizational life. The construct has been used to metaphorize, frame, interpret, and understand various aspects of organizational life, including leadership and the change process. The literature indicates that leaders can influence an organization by attending to its cultural dimensions. Much of this literature, however, is theoretical and speculative, and the empirical work has focused, for the most part, on business. The overarching purpose of this qualitative study was to enrich understanding of the culture construct and its …

Nursing Students' Experiences In Personal Spiritual Formation And In Provision Of Spiritual Care To Patients, Beverly Jane Cobb

Dissertations

Problem. Nursing professionals acknowledge that (a) spiritual care is part of holistic care, and (b) nursing education about spiritual care of patients is inadequate. Evidence points to the importance of personal faith and spirituality in order for the nurse to more effectively render spiritual care to patients. Enhancing knowledge about how nursing students learn spiritual care can benefit nursing education and, ultimately, patient care. This study explored how students with high faith maturity provided spiritual nursing care to patients.

Method. This study engaged phenomenological methods with a study population selected from two faith-based educational institutions. A total of 187 nursing …

K+- Induced Dilation Of Cremasteric Arterioles Involves Na+/K+Atpase And Inward Rectifier K+ Channels, Wendy Burns

Dissertations

The purpose of this study was to evaluate the possible mechanisms involved in cremasteric arteriolar dilation as a result of increased concentrations of ([K⁺]_o) extracellular potassium. Many other studies suggested that Na⁺/K⁺ ATPase or K_IR channels are responsible for potassium-induced vasodilation in other systems (2, 12, 22, 40, 46, 52, 16, 17, 25, 33, 34, 85, 99, 151). However, these studies show only partial inhibition of dilation as a result of independent blockageof each mechanism. The hypothesis of this study was that both mechanisms contribute to potassium-induced dilation seen in cremasteric arterioles. …

Preparing Teachers To Use Technology: The Webquest In The Secondary English Language Arts Methods Classroom, Melinda C. Dobson

Dissertations

This study focuses on why and how English language arts methods instructors can integrate WebQuest development into their courses. Behavioral, cognitive, and constructive learning theory are established as a theoretical basis for introducing the WebQuest into the English language arts methods curriculum. Practicing teachers are surveyed about their WebQuest-use to identify positive and negative outcomes of the activity. National and international standards the WebQuest fulfills are identified. This study focuses on how to integrate technology in general into the methods course and then documents the development of the researcher's WebQuest and that of three different secondary English language arts methods …

Ownership And Stewardship: Attitudes Among Michigan’S Voters Impacting Opposition To Great Lakes Water Diversions, Bruce A. Nanzer

Dissertations

The problem addressed by this research can be demonstrated through the following scenario: If we were to ask randomly chosen voters in the state of Michigan if they possessed sufficient knowledge of Great Lakes water diversion policy, the answer would likely be no. Yet, if after a short description of the purpose for this type of policy, the voter was questioned about supporting such actions he or she would likely voice strong support for strategies that would prevent water diversions.

The objective of this research was to understand why Michigan's voters would readily voice opposition to Great Lakes water diversions …

Effects Of Writing Therapy Across Ptsd And Chronic Stress, Jennifer E. Lewis

Dissertations

Research supports the effectiveness of writing therapy in reducing physical health problems and increasing positive feelings (Pennebaker & Beall, 1986). More recently, research indicates that writing about traumatic experiences is as effective as EMDR in reducing symptoms of Post Traumatic Stress Disorder (Largo-Marsh & Spates, 1997). The current study assessed the treatment efficacy of writing therapy for individuals with varying degrees of stress related symptoms. Specifically, this study examined writing treatment for Post-Traumatic Stress Disorder and work-related chronic stress or "burnout."

The study utilized a pretest-posttest comparison group design. Repeated measurements !)n primary dependent variables were collected at pretest through …

Interspecies Encounters: An Ethnography Of A Veterinary Hospital, Dana Atwood-Harvey

Dissertations

There were three broad reasons for this research. The larger goal was to continue to advance the incorporation of 'other' animals and the rest of nature in general in sociological theory and research. The second was to suggest to those who have incorporated 'other' animals into their research, to include them as participants. The third was to redirect the focus of those who have incorporated 'other' animals as participants, to the impact that ideological structures and other social factors have on human-'other' animal encounters. Toward this end, I directed the focus of my study to examine human-'other' animal encounters ina …

Essential Elements Of An Implementation Process For Grant-Funded Projects/Programs In Nonprofit Organizations, Margaret M. Bernhard

Dissertations

Grant seeking is a source of funding for many nonprofit organizations. If a proposal is funded, the organization must contend with the responsibility of project implementation and the expectations of successful project outcomes. A project implementation process with strategic and tactical steps that clearly define the path that leads to positive grant outcomes would assist the grant administrator. Using the Delphi Method as a methodological tool for facilitating dialog among anonymous experts, 12 foundation program officers identified, ranked, and rated the essential elements and barriers of grant implementation. The process revealed 13 essential elements of implementation and 11 barriers to …

Treatment Of Specific Animal Phobias And The Relationship Of An Opiate Antagonist To Outcome, Andrea T. Kozak

Dissertations

Previous research with non-humans, and humans to a lesser degree, suggest the endogenous opiate system is at work to assist an organism in times of pain or stress. One-session exposure treatment is an effective treatment for specific animal phobia and entails modest degrees of stress during implementation. At the present time, the mechanisms at work that facilitate the success of this intervention have been incompletely investigated. The focus of the present study was to determine whether the endogenous opiate system is activated during the treatment of persons with specific animal phobias. In a double-blind investigation, 15 individuals with specific animal …

Cellular Proliferation, Death And Histology In Gambusia Affinis Livers After Exposure To 2-Aminofluorene And Benzidine, Susan J. Lentz

Dissertations

A fundamental need exists for aquatic animals in the biomonitoring of aquatic ecosystems for environmental carcinogens. G. affinis, a small fish species, is selected for this study due to its hardiness, non-migratory nature, geographic diversity and ability to develop tumors. Molecular tools for cellular proliferation and death are examined for use with G. affinis. Additionally, these tools are used to investigate the early carcinogenic effects of 2-aminofluorene and benzidine, both individually and combined, on G. affinis livers.

Antibodies to proliferating cell nuclear antigen (PCNA), p53, cleaved caspase-3 and cleaved poly(ADP-ribose) polymerase (PARP) were examined for use in G. …

Using Behavioral Systems Analysis To Improve The Placement Service Of The Association For Behavior Analysis, Lori H. Miller

Dissertations

This dissertation demonstrated the use of behavioral systems analysis tools in the development of a useful service in a non-profit association. The purpose of this study was threefold: (1) to design a placement system that would add value to the field of behavior analysis by placing behavior analysts in appropriate jobs, internships, and graduate programs; (2) to develop a data collection infrastructure that would assist the Association for Behavior Analysis (ABA) in the assessment of the trends related to the human resources of the field; and (3) to advance the knowledge and methodology of behavioral systems analysis.

Six objectives were …

A Behavior Systems Analysis Approach To Designing A Hlgh-Impact Knowledge Management System, Jacalyn S. Smeltzer

Dissertations

Behavior systems analysis is an approach to designing and managing systems that incorporates the human-performance-technology model of systems analysis and considers the basic principles of behavior when analyzing causes of performance deficiencies and in selecting interventions to address those deficiencies. Behavior systems analysis focuses on three major conditions that influence behavior: (1) the motivation of the individual, (2) the immediate environmental cues, and (3) the consequences of behavior (Malott & Garcia, 1987; Suarez, 2001). The present study used behavior systems analysis to design a knowledge management system (independent variable) for a small business, a consulting firm in the employer-provided training …

Influential Factors Contributing To Exercise Compliance Following A Structured Lifestyle Change Program, Wayne E. Borin Edd

Dissertations

Cardiovascular disease remains the number one cause of death in the United States, with five hundred thousand people diagnosed annually. Even though regular exercise has been shown to dramatically reduce the risk of cardiovascular disease, few hospitals offer programs that focus on the requisite lifestyle changes for participants to maintain long-term exercise programs. In an effort to determine what factors contribute to long-term exercise compliance, this study surveyed 279 participants of the Scripps Ornish/Healing Hearts program, a comprehensive lifestyle change program, to identify the factors that helped explain variation in exercise compliance among program completers. Results of the hierarchical multiple …

The Effects Of Gamma-Hydroxybutyrate On Response Acquisition, Sean Patrick Laraway

Dissertations

In the last 10 years, the use and abuse of the club drug gamma-hydroxybutyrate (GHB) has noticeably increased. Because GHB has only recently emerged as a drug of abuse, relatively little is known about the drug's behavioral effects, including its effects on learning. Therefore, the present study sought to characterize GHB's effects on rats' acquisition of a lever-press response using a two-lever, resetting/cancellation procedure. Under this procedure, responses on one ( reinforcement ) lever produced a single food pellet after a delay of 0, 20, or 40 s. Presses on the second ( cancellation ) lever during a delay interval …

Identifying The Function Of Aberrant Behavior: Comparing Variations Of The Experimental Functional Analysis, Kathryn M. Potoczak

Dissertations

The advent of the experimental functional analysis has had a significant effect on the field of behavior analysis in shifting the focus from topography-based interventions for aberrant behavior to treatment based on function. The original method developed by Iwata, Dorsey, Slifer, Bauman, and Richman in 1982 utilized attention, demand, alone, and play conditions in a multielement design. Its effectiveness in determining the function of aberrant behavior using both antecedents and corresponding contingencies of reinforcement is well established, and it is the most prevalent method of functional assessment used today.

However, an alternative to the Iwata et al. (1982) procedure exists. …

Student Ecosystems Problem Solving With Computer Simulation, Melissa A. Howse

Dissertations

Computer simulations, such as the BioQUEST Environmental Decision Making (EDM) program, represent a viable supplement or alternative to traditional science teaching approaches. This study concentrated on the manner in which knowledge is acquired and then disseminated through the use of the simulations. In addition, the study took into account the nature of science by revealing what notions of ecosystems and simulation were revealed when students encountered concepts imparted to them via this method. The following research questions guided this study: (1) What content knowledge do students use to solve ecology problems? (2) What procedural knowledge do students use to solve …

Development And Psychometric Evaluation Of The Wikoff Spiritual Focus Questionnaire, Karen Luther Wikoff Phd

Dissertations

Spirituality is a concept that has been a part of nursing since nursing began. In every culture spirituality is a component of healing. However, in the United States, nurses seldom assess the concept of spirituality and the patient's spiritual needs are often not addressed. Wikoff Spiritual Focus Questionnaire was designed to help nurses assess and meet the patient's spiritual needs. A review of literature revealed that spirituality was comprised of a relationship between a Higher Power, Self, Others, and Nature which resulted in a sense of being, knowing and life purpose. A fifth dimension of Religion was identified through a …

An Interpretive Exploration Of The Meaning Of Being With Women During Birth For Midwives, Lauren P. Hunter Phd

Dissertations

This study explored the meaning of the phenomenon of the midwife's experience of being present with a woman during childbirth. The value and importance of being with a woman during childbirth, specific and unique to midwifery care, is reflected in midwifery philosophies and models of care. This study looked through the lens of midwives who have written poetry about births they have attended to learn more about the experience of being with a woman. Hermeneutical phenomenology was selected for the philosophical methodology and method because it looked at both the phenomenon and the use of language to describe the phenomenon. …

An Examination Of Perceived Stress And Coping Patterns Of Pastoral Wives In The Nigerian Union Mission Of The Seventh-Day Adventist Church, Olufunmilayo Janet Ola

Dissertations

Purpose of Study. Most studies examining stress and coping patterns of pastoral wives have been conducted from an advanced country background. Even though all the researchers agreed that these pastoral wives do experience a certain amount of stress, very little is known about pastoral wives in third-world countries who are faced with poverty, illiteracy, diseases and cultural restraints. Therefore, the purpose of this study was to examine perceived stress and coping patterns of pastoral wives of the Nigerian Union Mission of the Seventh-day Adventist church.

Methodology. A quantitative method of collecting data was used in this study. The two psychological …

A Study On Various Factors And Their Relationship To Burnout Among Seventh-Day Adventist Clergy, W. Don Edwards

Dissertations

Problem. Few studies have addressed burnout among Seventh-day Adventist (SDA) clergy. Many SDA ministers report experiencing high stress in their ministries and they find it difficult to function optimally under these circumstances. Others experience serious complications that lead them to terminate their work as ministers.

Method. A quantitative research design was used for an ex post facto study of 130 pastors from the Pacific Union Conference. They completed two questionnaires: the Pastoral Services Demographic Data Sheet (PSDDS) and the Maslach Burnout Inventory (MBI).

Results. This study examined 12 variables and found that 10 variables had a significant …

A Comparative Study Of Giving And Volunteering Patterns Among Adults With Seventh-Day Adventist And Other Christian Religious Identities, Karen E. Stockton-Chilson

Dissertations

Problem. In an environment that challenges the non-profit sector, including church-based organizations, to do more with less, it is important to understand the mechanisms that build and sustain two key resources-individual giving and volunteering. Research indicates that there is a great deal of variation in the extent to which individuals provide help. An integrative theoretical model is utilized to examine and compare the giving and volunteering behaviors, socialization, attitudes, reasons, and motivations of adults with Seventh-day Adventist and other Christian religious identities, with secondary consideration given to the effect of potential ethnic variations.

Method. The sample (N = 1359) …

Inbreeding, Male Diploidy, And Complementary Sex Determination In The Solitary Wasp Euodynerus Foraminatus, Julie Kozaczka Stahlhut

Dissertations

In the insect order Hymenoptera, which includes wasps, bees, and ants, females normally develop from fertilized eggs and are diploid, while males develop from unfertilized eggs and are haploid. Underlying mechanisms of sex determination are more complex and vary among different hymenopteran taxa. One such method is single-locus complementary sex determination, or sl-CSD, in which sex is determined by a single gene locus with many alleles. In species with sl-CSD, diploid individuals that are heterozygous at the sex locus develop as normal females and hemizygous (haploid) individuals as normal males, but diploids homozygous at the sex locus will also develop …

Roles And Regulation Of Nf-Κb In Platelet-Derived Growth Factor Transformed Cells, Takeshi Shimamura

Dissertations

Platelet-derived growth factor (PDGF) is overexpressed in various cancer cells and the overexpression may be correlated with the prognosis of several types of cancers. Binding of PDGF to its receptors induces receptor dimerization and subsequent autophosphorylation of tyrosine residues in the receptor’s cytoplasmic domains. The phosphorylated tyrosine residues interact with the secondary signaling molecules to initiate signaling cascades that trigger cellular changes by affecting downstream effectors. In our recent publication, we have shown that a NF-κB mediates the transformation of mouse fibroblast cells overexpressing PDGF B chain. Though there is a significant correlation between PDGF stimulation and NF-κB activity, it …

Knowledge Discovery And Modeling In Genomic Databases, Michael M. Yin

Dissertations

This dissertation research is targeted toward developing effective and accurate methods for identifying gene structures in the genomes of high eukaryotes, such as vertebrate organisms. Several effective hidden Markov models (HMMs) are developed to represent the consensus and degeneracy features of the functional sites including protein-translation start sites, mRNA splicing junction donor and acceptor sites in vertebrate genes. The HMM system based on the developed models is fully trained using an expectation maximization (EM) algorithm and the system performance is evaluated using a 10-way cross-validation method. Experimental results show that the proposed HMM system achieves high sensitivity and specificity in …

Why Religious People Believe What They Shouldn't: Explaining Theological Incorrectness In South Asia And America, D. Jason Slone

Dissertations

Cross-cultural descriptions of religious thought and behavior in South Asia and America show that people commonly hold ideas and perform actions that seem to be not only conceptually incoherent but also “theologically incorrect” by the standards of their own traditions. For example. South Asian Theravada Buddhists are taught that the historical Buddha is unavailable because he attained enlightenment and achieved parinirvana (“complete extinction”) and yet conceptually and ritually represent him as if he is present and available for petition. Similarly, American Protestants represent the Christian God as having absolute divine sovereignty and yet reveal confidence in an inner locus of …

Assessment Of The Discriminative Stimulus Effects Of (±)-3,4-Methylenedioxymethamphetamine (Mdma, "Ecstasy") And (+Lysergic Add Diethylamide (Lsd) In A Three-Lever Drug Discrimination Procedure, Amy K. Goodwin

Dissertations

(±)3,4-Methylenedioxymethamphetamine (MDMA) is a common drug of abuse known as "ecstasy." Currently, MDMA is classified into the traditional drug classes as both a "stimulant" and a "hallucinogen" because it is reported to share both subjective and physiological properties of both classes. MDMA is thought to produce its psychoactive effects by acting as both a serotonin and a dopamine agonist. However, the relative importance of the serotonin and dopamine neurotransmitter systems in mediating the stimulus properties of MDMA remains unclear.

The drug discrimination assay is used to classify drugs as "similar" or "dissimilar," as well as to examine underlying neurochemical changes …