Digital Commons Network^™

Numerical Study Of Flow In Three-Dimensional Fiber Networks And Sedimentation Of Curved Fiber By Lattice Boltzmann Method, Xiaoying Rong

Dissertations

Fiber network is modeled as a three-dimensional random cylindrical fiber network. Nonlinear behavior of fluid flowing through the fiber network is numerically simulated by using the lattice Boltzmann (LB) method. Nonlinear relationship between the friction factor and the modified Reynolds number is simulated and analyzed by using the Fochheimer equation, which includes the quadratic term of velocity. There is a transition from linear to nonlinear region when the Reynolds numbers are sufficiently high, reflecting the inertial effect of the flows. The simulated permeability of such fiber network is compared to the experimental results and the finite element simulations.

Dynamic motions …

A Comparative Study Of Learning Styles And Job Satisfaction To Medical Specialty Chosen Among Physician Assistant Graduates, Eric H. Vangsnes

Dissertations

Since the mid-1980s, a trend has developed whereby Physician Assistants (PAs) are making a transition into medical and surgical specialties (Hooker, 1992). In 1984, 18% of PAs worked in medical and surgical specialties; by 1991, this proportion had risen to 22%; and by 2006, 43% of all PAs worked in medical and surgical specialties ( American Academy of Physician Assistants (AAPA) Census Data 2006 , 2007; Hooker, 1992). One development that may have increased the number of PAs entering specialties was the creation of post-graduate residency programs.

This research examined possible associations between learning style and medical specialty, medical specialty …

Fluency In Pigeons: The Effects Of Response Rate On Learning, Matthew L. Porritt

Dissertations

Instructional procedures that build high response rates are purported to have significant benefits over procedures that do not focus on fast responding (Binder, 1996). However, much of the research exploring rate-building procedures is confounded by two variables: rate of reinforcement and number of exposures (Doughty, Chase, & O'Shields, 2004). In six experiments, the present study examined the effects of three variables, rate of reinforcement, number of exposures, and rate of responding, on learning under rate-building procedures in pigeons. In Experiment 1, rate-building produced significantly better learning outcomes when compared to a rate-controlled condition with number of exposures held constant. In …

Scholarly Art: The Writing Experiences Of Student Affairs Professionals, Wanda L.E. Viento

Dissertations

Special issues of the major student affairs journals recently have reflected on the scholarship of the profession (Blimling, 2001; Roper, 2002). The focus of these recent reflections, as well as prior publications on student affairs scholarship (e.g., Davis & Liddell, 1997; Engstrom, 1999; Hunter, 1986; Hunter & Kuh, 1987), largely has been on mentoring research, describing scholarship trends, critiquing existing patterns, and/or envisioning the shape of future scholarship. While the profession of student affairs acknowledges the critical need to promote scholarship and the dissemination of information, little has actually been done to help people get there. Only a few articles …

Symptom Burden At End Of Life In Patients With Terminal And Life-Threatening Illness In Intensive Care Units, Peggy G. Kalowes Phd, Msn, Rn, Cns

Dissertations

The purpose of this study was to examine the symptom burden and severity of symptom distress reported by ICU patients at high-risk for death and to compare patient-rated symptoms and distress for concordance with symptoms reported by a family member. A prospective, correlational design with two data-points was used to study a convenience sample of 80 patients and 53 family members. The Condensed Memorial Symptom Assessment Scale (CMSAS) was used to gain patient/proxy report of symptoms on the first and third day after admission to the ICU. The majority of patients were symptomatic (98%), reporting an average of 10.23 symptoms. …

Navy Nurses' Experiences During Operation Unified Assistance Aboard The Usns Mercy: A Grounded Theory Study, Angelica L.C. Almonte Phd

Dissertations

On December 26, 2004, the most powerful earthquake in 40 years erupted under the Indian Ocean triggering a deadly tsunami that devastated 11 Asian and African countries and killed more than 280,000. The US Navy responded through Operation Unified Assistance (OUA). In a historic first on the hospital ship USNS MERCY, the U.S. Navy deployed one team with members from the Navy, the U.S Public Health Service, a non-government organization (NGO), and a civilian mariner crew to provide humanitarian aid. Despite these efforts, there is a dearth of scholarly research work published on nurses' experiences during the disaster. The purpose …

A Composite Cognition Instrument For Nursing Care Of Combat Casualties, Patricia Frohock Hanes Phd, Msn, Maed, Rn

Dissertations

In the course of caring for military and civilian combat casualties, military nurses must make rapid, accurate decisions. When developing methods to teach nurses essential content for combat casualty care, it is important to understand the cognitive and learning processes involved in acquiring that knowledge. Measures to examine how military nurses think and learn have significance, especially when applied to the high-stress, high-stakes practice arena of combat causality care. Use of these measures in evaluating educational strategies will help answer the need for better deployment readiness for military nurses. The purpose of this study is to develop an instrument to …

A Collaborative, Hierarchical, Incremental, And Problem Solving Information Systems Development Model, Timothy Joseph Burns

Dissertations

The "software crisis" has been a much discussed and debated topic in Information Systems research. A core cause of the crisis is often identified as the methodologies and approaches used to develop information systems. Thus, over the years a multitude of methodologies have emerged in support of quality software. While many of these methodologies have been effective, research has shown that system development is a highly circumstantial process, and that no one methodology can be optimal in every context of every project. It is also a fact that system development practitioners have employed ad hoc approaches to modify formal methodologies …

Hydrodynamics Investigation Of In-Vitro Dissolution Testing, Ge Bai

Dissertations

Dissolution testing is routinely carried out in the pharmaceutical industry to determine dissolution rate of solid dosage forms. The United States Pharmacopoeia (USP) Dissolution Apparatus II is the device most commonly used for this purpose. Despite its widespread use, dissolution testing remains susceptible to significant error and test failures. Limited information is available on the hydrodynamics of this apparatus, although hydrodynamic effects can play a major role on test performance.

Laser-Doppler Velocimetry (LDV) and Computational Fluid Dynamics (CFD) were used here to experimentally map and computationally predict the velocity distribution inside a standard USP Apparatus II under the typical operating …

Some Contributions On Mimo Radar, Nikolaus Lehmann

Dissertations

Motivated by recent advances in Multiple Input Multiple Output (MIMO) wireless communications, this dissertation aims at exploring the potential of MIMO approaches in the radar context. In communications, MIMO systems combat the fading effects of the multi-path channel with spatial diversity. Further, the scattering environment can be used by such systems to achieve spatial multiplexing. In radar, a complex target consisting of several scatterers takes the place of the multi-path channel of the communication problem. A target's radar cross section (RCS), which determines the amount of returned power, greatly varies with the considered aspect. Those variations significantly impair the detection …

Nanoparticle Formation And Coating Using Supercritical Fluids, Abhijit Aniruddha Gokhale

Dissertations

Jet breakup phenomenon and nanoparticle formation

The focus of this dissertation is to study the SAS process to manufacture nanoparticles with minimum agglomeration, controlled size and size distribution. Solution jet breakup and solvent evaporation into supercritical fluid (SC CO₂) is studied using high speed charged coupled device (CCD) camera facilitated with double shot particle image veloimetry (PIV) laser and a high pressure view cell. Particles formation using SAS is studied. Polyvinylpyrrolidone (PVP) particles are formed using micron size capillary nozzles and combination of thermodynamically good and poor solvents in order to achieve nano-sized particles with reduced agglomeration and …

High Resolution Studies Of Complex Solar Active Regions, Na Deng

Dissertations

Flares and Coronal Mass Ejections (CMEs) are energetic events, which can even impact the near-Earth environment and are the principal source of space weather. Most of them originate in solar active regions. The most violent events are produced in sunspots with a complex magnetic field topology. Studying their morphology and dynamics is helpful in understanding the energy accumulation and release mechanisms for flares and CMEs, which are intriguing problems in solar physics.

The study of complex active regions is based on high-resolution observations from space missions and new instruments at the Big Bear Solar Observatory (BBSO). Adaptive optics (AG) in …

Solvent Resistant Microporous/Nanoporous Polymeric Hollow Fiber And Flat Film Membranes And Their Applications, Praveen B. Kosaraju

Dissertations

The separation and purification of organic-solvent-based process streams may be carried out by membrane processes such as nanofiltration/ultrafiltration/microfiltration and membrane solvent extraction. Lack of solvent stability and chemical stability of most commercially available membranes is limiting the utilization of the above mentioned membrane technologies. This dissertation was primarily focused on developing solvent resistant hollow fiber and flat film membranes for separation and purification of organic-solvent-based process streams.

Available porous polymeric supports (Polypropylene (PP), Polyethersulfone (PES) and Nylon) suitable for the required solvent-stable applications were chosen first and then the supports were modified to satisfy the requirements for the applications. Membrane …

Enhancement Of Fluidization And Filtration Using Nanoparticle Agglomerates And Aerogels, Jose A. Quevedo

Dissertations

Previous works have classified the fluidization behavior of nanoparticles as Agglomerate Particulate Fluidization (APF) and Agglomerate Bubbling Fluidization (ABE). These fluidization behaviors are quite different in regard to the fluidized bed expansion, the presence of bubbles and the smoothness of the bed surface, with APF nanopowders showing a much more homogeneous fluidization and a much better dispersion than ABE nanopowders which are generally very difficult to fluidize and show vigorous bubbling. In the present work, the fluidization of APF as well as ABF nanopowders is studied in depth, both conventionally, and in the presence of extemal assistance; several related topics …

Investigation Of Formation And Applications Of High-Speed Liquid Projectiles, Oleg Petrenko

Dissertations

The work comprises experimental and numerical studies of generation and application of high-speed liquid projectiles. Numerical models were created for a projectile formation by two kinds of launchers, water extruder and water cannon. In the water extruder the kinetic energy of a fast moving piston is transferred to the water load and extrudes the load at a high speed. By contrast in the water cannon the water load itself accumulates the kinetic energy from the expanding combustion gasses. Then, in the course of water motion through the converging nozzle the energy is redistributed between head and tail of the projectile. …

Reactive Modification And Crystallization Behavior Of Foamed Poly(Butylene Terephthalate), Byeong Joon Jeong

Dissertations

The objective of this study is to investigate the feasibility of preparing low density foams based on poly(butylene terephthalate) (PBT) through modification of its molecular structure and rheological characteristics by reactive extrusion. The scientific and/or engineering interpretation of the experimental data was based on fundamentals of extrusion, crystallization mechanisms, as well as information on reactivity and tendency toward degradation of PBT.

As a preliminary study, the extrusion foaming behavior of a commercial linear semi-crystalline PBT with a chemical blowing agent (CBA) was investigated. Foam characteristics were functions of extrusion operational variables, such as die set temperature and screw speed. Gas …

Information Architecture For Irish Grocery Retailers Using Business Intelligence Tools, Patrick Doran

Dissertations

Business Intelligence (BI) systems have a pivotal role to play in assisting retail management in the Irish grocery retail sector. The emergence of super chain stores and the increasing competition within this sector only increases their need for an effective and reliable Business Intelligence (BI) system. However, despite this growing need Business Intelligence (BI) systems as they are currently deployed and used are not supplying the various levels of management with the necessary information they require to make effective retail management decisions. The information and reports received from Business Intelligence (BI) systems lack structure, are missing important pieces of information …

A Framework For The Introduction Of Organisational Learning Using Web 2.0 Applications, Joseph M. Reynolds

Dissertations

We are now becoming more and more dependent on web technologies in our personal lives for our communication, information and entertainment needs. But what about using these skills and technologies for our business lives, could they transform the business world in the same way they have transformed our personal world? The purpose of this research was to investigate whether the latest web applications could be successfully implemented into an organisation who wished to transform itself into a modern and flexible organisation. This research was primarily focused on introducing organisational learning into the business through the use of new technology and …

Politics And The Glass Ceiling In American Law Enforcement: Why Not More Women Chiefs Of Police?, Madeline G. Meistrich Edd

Dissertations

Law enforcement is one of the last male-dominated occupations. Out of 18,000 police departments in the United States, only 200 to 250 have women chiefs. Such under-representation reflects the "glass ceiling" effect of a gender-based metaphorical barrier that prevents women from rising to the top of an organization, regardless of qualifications. The research examined three questions: what are the issues and problems articulated by women officers attempting to move upwards; what strategies were employed as they attempted to advance; and what strategies could help other women reach the top? Nine female primary participants in law enforcement leadership were interviewed, as …

Reasons Seventh-Day Adventist Parents Gave For Not Sending Their Children To Seventh-Day Adventist Elementary And Secondary Schools, Irma C. Laborde

Dissertations

Problem. The Seventh-day Adventist elementary and secondary schools in the USA show a continuous enrollment decline. This study’s goal is to explore the reasons SDA parents give for why they do not send their children to SDA schools.

Method.

The participants were limited to the church members of the Lake Union Conference. Qualitative methodology was used in this study. Three groups of participants were selected using criterion sampling—non-home-schooling parents, home- schooling parents, and administrators. Data collection occurred through in-depth interviews, focus groups, and a one-question survey. The interviews were audiotaped. The tapes were transcribed verbatim, coded, and grouped into themes. …

Hospitality Versus Patronage: An Investigation Of Social Dynamics In The Third Epistle Of John, Igor Lorencin

Dissertations

Problem. This investigation focuses on social dynamics in the third epistle of John. In the context of 3 John hospitality and patronage seem to be opposed as two non-compatible models of behavior. In what sense they are different and what makes them non compatible in a church setting is the main focus of this research.

Method. A social approach is utilized in this investigation for the purpose of understanding the social system, values, and circumstances that shaped the events of 3 John. I first collect evidence to explain the ancient customs of hospitality and patronage in order to create a …

Open Software To Innovation: The Critical Success Factors Of Massively Multiplayer Online Role Playing Games (Mmorpg) In China And Ireland., Wei Chen

Dissertations

This project investigates the factors leading to the success of China’s Massively Multiplayer Online Role Playing Games (MMORPG) market and gives an analysis of how Open source has contributed to these success factors. It then will look at how the use of open source is mirrored in Ireland’s market for example, the software sector to see if the same factors are apparent or there are indicators of these. Knowledge Management plays a very important role for fasten the innovation of Open source software development in China.

Three Dimensional Numerical Modeling Of A Diagonal Magnetohydrodynamic Accelerator, Matthew William Turner

Dissertations

No abstract provided.

Demonstrating Experiential Learning At The Graduate Level Using Portfolio Development And Reflection, David Winslow Rausch

Dissertations

Problem. Various guidelines for assessment have been developed in an effort to promote academic quality and integrity for educational programs that recognize experiential learning. The purpose of this present study was to determine the extent to which experiential learning and assessment, through portfolio development, help adult students in a graduate-degree program demonstrate graduate-level learning and competency.

Method. This qualitative single-case study used the assessment processes and outcomes elements of the Jackson and Maclsaac process model to analyze the use of reflective practice and the use of portfolios in a graduate education program. Data were triangulated using individual interviews and the …

The Use Of Play Therapy With Adult Survivors Of Childhood Abuse, Mary J. Roehrig

Dissertations

Problem. A growing trend among therapists is the use of play therapy interventions with adult clients to facilitate resolution of early childhood trauma and to promote emotional and spiritual growth. The purpose of this study was to explore the use and effectiveness of play therapy techniques with adult survivors of childhood abuse.

Method. In an exploratory approach, therapists were invited to participate in an online survey. Of the participating therapists, 21 agreed to a subsequent in-depth interview. The Theme Analysis for Word-Rich Data was used to identify themes from the interviews.

Results. Play therapy with adult survivors of childhood abuse …

Stakeholders' Perceptions Of The Jbte Teaching-Practice Benchmarks : A Descriptive Exploration Of Two Teachers' Colleges In Jamaica, Hyacinth Paulina Rose

Dissertations

Purpose. The purpose of this study was to explore the implementation of and perceptions of the Joint Board of Teacher Education benchmarks for teaching practice, or student teaching. Data were gathered concerning how the benchmarks were implemented and the perceptions of multiple stakeholders regarding the adequacy of their implementation. Additionally, stakeholders were asked about the possible need for including some benchmarks from the USA in order to create an ideal teaching-practice program in Jamaica.

Method. This study used a multiple descriptive case study design. Two teacher training institutions in Jamaica were purposively selected. From each of these institutions a focus …

A Comparison Of The Adult Bible Study Guide Of The Seventh-Day Adventist Church And A Prototype Guide Designed To Promote Spiritual Growth, Lyndelle Brower Chiomenti

Dissertations

Problem. Despite the Adult Bible Study Guide's potential for promoting Christian spirituality among Seventh-day Adventist Church members, no studies have investigated its impact on the spirituality of its users. Beginning as a way to disseminate the unique biblical doctrines of thefledgling Church, the Guide remains largely expository and apologetic in nature, often neglecting the use of methods and spiritual disciplines which promote spirituality.

Method. Based on the same topic as the regular Guide for second quarter, 2005, an Adult Bible Study Guide using Kolb's learning cycle and learning styles was developed to promote Christian spiritual growth. The effect both Guides …

The Effectiveness Of Rating Scales And Semi-Structured Interview In Diagnosing Adult Attention Deficit Hyperactivity Disorder, Carolyn Mae Cofrancesco

Dissertations

Problem and purpose. There are few standardized tools for diagnosing ADHD in adults. The purpose of this study was to compare a standardized rating scale (CAARS) used by different observers, with a comprehensive diagnostic interview (CAADID) with respect to their ability to diagnose subtypes of ADHD.

Method. Subjects for this study came from baseline data of 98 patients (18 to 60 years ofage) participating in a drug trial for adult ADHD. The CAADID interview results in a yes-no decision as to whether the patient meets DSM-IV criteria for the subtypes ADHD. A t -test was used to compare the CAADID-diagnosed …

The Iron Age I Structure On Mount Ebal: Excavation And Interpretation, Ralph K. Hawkins

Dissertations

Problem. The Iron Age I site on Mt. Ebal, discovered in 1980 by Adam Zertal and excavated between 1982 and 1989, has remained largely unknown by both the scholarly community and the public. No scholarly congress or colloquium has ever been held regarding the Mt. Ebal excavations. The Mt. Ebal excavations, however, may have important implications for reconstructing Israelite origins. This present study investigates the Mt. Ebal excavationand its results.

Method. My study uses the comparative method and is divided into six chapters. Chapter 1 serves as in introduction, giving an overview of the investigation to be carried out in …

Acknowledged And Perceived Reasons For Non-Attendance At Christian Churches In The Pacifica Community, A Suburb Of San Francisco, California, Peter Edward Burch

Dissertations

Problem. Although formal research on the reasons for non-attendance at Christian churches in America has been conducted, it is not known how these reasons apply to the Pacifica community of California, a suburb of San Francisco. Furthermore, little, if any, research has been conducted to compare the reasons for non-attendance as acknowledged by non-attenders with the reasons as perceived by attenders. The purpose of this study was to examine and compare the reasons for non-attendance in Pacifica.

Method. A survey research method was employed to collect data on the acknowledged and perceived reasons for non-attendance at Christian churches in Pacifica. …