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 …

Democracy On Stilts: Bolivia’S Democracy From Stability To Crisis, Miguel Centellas

Dissertations

Bolivia’s recent political crisis starkly contrasts to the preceding two decades of relative democratic stability. Though a unique system of “parliamentarized” presidentialism together with lingering consensus on the national project inherited from the 1952 Revolution supported democratic stability, using qualitative and quantitative methods, this study shows that seemingly benign changes in institutional design made in the 1990s contributed to the acceleration of already existing tendencies towards divisive sectoral, regional, and ethnic politics. A key observation is that successful long-term democratization requires institutions for adequately channeling and representing social demands as well as a shared vision of a political “imagined community” …

Global And Quantitative Gene Expression Analysis Of The Effects Of Drinking Water Exposure To Lead Acetate In Fisher 344 Male Rats Liver, Worlanyo Eric Gato

Dissertations

The primary objective of this research is to analyze global gene expression patterns occurring in Fisher 344 rat livers exposed to varying levels of lead and times. The hypotheses were that: (1) effects associated with Pb exposure are both dose and time dependent and (2) several genes will be over-expressed or repressed including transcripts associated with calcium signaling. Initially, the effects of Pb exposures upon morphometnc indices, liver and kidney tissue histology, Pb distribution, Pb interaction with other trace metals including Zn, Cu, Co, Fe, Ni and Ca were assessed. Results showed a significant accumulation of lead in blood, liver, …

The Effects Of Post-Secondary Education On State Troopers’ Job Performance, Stress Levels, And Authoritarian Attitudes, Carl J. Lafata

Dissertations

This study was designed to determine the effects of post-secondary education on police officers' job performance, stress levels, and levels of authoritarianism as measured by Altemeyer's (1996) Right-Wing Authoritarianism Scale questionnaire. It involved the analysis of data voluntarily and anonymously submitted via an internet-based survey by 356 of the Michigan State Police's approximately 1,800 enlisted members (those members who are state-certified police officers), along with information collected from informal personal interviews held with a select group of seven of the department's senior leaders. Subsequent analysis of the collected quantitative data revealed no statistical support for the project's first two hypotheses, …

Conceptual Change Resulting From Experiential Learning With Business Enterprise Software, Thomas F. Rienzo

Dissertations

This study examined business process concept changes in undergraduate business students through an active learning experience with commercial software that is used by industrial companies to optimize and control their business transaction processing. Students that participated in this study were enrolled in an introductory information technology course that employs enterprise resource planning (ERP) software to demonstrate interactions among business processes involved in purchase and sales processing cycles. Specifically, business process comprehension was examined through three interdisciplinary lenses: (1) conceptual change from the discipline of science education, (2) learning styles from the discipline of business management, and (3) technology acceptance from …

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 …

What’S So Hard About Algebra? A Grounded Theory Study Of Adult Algebra Learners, Michael Steele Reese Edd

Dissertations

In California community colleges, fewer than half of students who enroll in basic algebra courses finish with a grade of C or better. Such a low success rate creates an intense demand on institutional resources, including faculty efforts, tutorial services, classroom availability, and financial aid. Furthermore, students who do poorly in algebra also tend to struggle in other quantitative courses. While research suggests that child algebra learners tend to exhibit specific misconceptions, not much is known about misconceptions held by adult algebra learners. Research does indicate, however, that certain general learning characteristics are common among adult learners. The present study …

All Children Are Our Children, Tania Giordani

Dissertations

The purpose of the study was to talk to parents who “fight attitudes and perceptions that date back centuries and a school system whose resistance to change is unparalleled” (Fine, 1993, p. 692) and see how they persevere as they try to transform this system. Narrative inquiry, using semi-structured interviews, was used to explore the common characteristics and motivations of parents who are advocating for changes within their children’s school. All the participants in this study were mothers of children enrolled in public schools.

The findings suggest that these women are: (1) influenced by others who have a legacy of …

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 …

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 …

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 …

Flow Characteristics And Phase Interactions Of Evaporating Sprays In Gas-Solid Suspensions, Muhammad Mushahid Rafique Qureshi

Dissertations

Evaporating spray jets have a wide range of applications in many industrial processes such as fluidized catalytic cracking of crude oil in petroleum refinery, coal gasification, fluidized coking to make synthetic crude oil, and condensed mode gas polymerization. The rapid evaporation of spray jets significantly affects the gas-solids mixing, solids concentration, gas/solids temperature and gas/solids velocity acceleration. The complex interactions mechanism of phase change, three phase interaction, heat and mass transfer of gas, solids and evaporating droplets dominate the process efficiency and product quality. In such three-phase flows, the phase transport characteristics are influenced by both droplet-gas interaction and droplet-solid …

Isolating Student, School, And Community Effects On School Weapon Carrying, Adam Michael Watkins

Dissertations

Much prior research has alluded to the importance of community conditions in shaping levels of violence in around and schools. It is interesting to find, therefore, that few studies have systematically examined the effects of broader contextual characteristics (e.g., economic disadvantage) on levels of student misbehavior in schools. This research filled a part of this void in the school violence literature by using data from the National Longitudinal Study of Adolescent Health to identify whether social conditions in schools¿ attendance areas were statistically related to levels of student weapon carrying across a national sample of 55 high schools. Multilevel models …

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 …

Pedagogy In Online Graduate Business Learning Environments, Alicia Maria Gallegos Butters Edd

Dissertations

Many higher education institutions have decided to offer graduate business online courses and full degree online programs. Offering a quality education for graduate business students online is of concern to business school professors, administrators, and students. Instructors are concerned with the content, delivery method, and level of student achievement. Instructional design support for the online instructors is often lacking in the online curriculum and pedagogy, leaving the faculty with a great deal of freedom to create their own course content, structure, and delivery without any formal distance education training. For this reason, it is imperative for universities to establish online …

Teacher Success, Assessment, And Evaluation Practices In Service-Learning Composition Courses, Faith-Ann Abiola Mcgarrell

Dissertations

Problem. Over the last 15 years, service-learning in first-year composition has emerged as a critical area of study. Service-learning in composition places students in writing environments within the community, encourages reading and writing about social issues, and provides the opportunity for students to participate in community projects. A significant problem with this approach is the alignment between outcomes of the discipline and those of service. Practitioners feel that a clear understanding of compatibility between the two areas of study would result in better practice and further buy-in by those who do not teach from a service-learning perspective.

Method. In service-learning …

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 …

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 Curriculum, Instruction, And Assessment Of Dispositions In Preservice Teacher Education, Andrea Marie Baldwin

Dissertations

Problem. In 2000, NCATE included dispositions in its professional standards as a requirement for teacher education units seeking (re)accreditation with its organization. The problem of this investigation was to examine how program directors, faculty, and preservice teacher candidates in three selected preservice teacher education programs in Indiana and Michigan were responding to this NCATE mandate.

Purpose. The purpose was to explore the ways in which and to what extent dispositionswere included in the curriculum, taught, and assessed in programs, both religiously affiliated and public.

Methodology. A mixed-methods approach was used to collect and analyze data. Three levels of participants were …

The Health Of Patient Privacy: The Patient's Perspective On The Hipaa Protected Health Information, Deborah Lange-Kuitse

Dissertations

Problem

As healthcare entities continue to focus on HIPAA compliance, they must enforce policies that require patients to sign and express understanding of the organization’s privacy policies. It appears the patient’s perspective on healthcare privacy has not been considered within the HIPAA privacy ruling. Patients are healthcare consumers, yet little research has been done on assessing the individual consumer’s perspective on what Protected Health Information (PHI) is actually important to protect and from whom it is important to protect it.

Method

A quantitative survey was developed and distributed to the participants of the Carnegie group, an independent insurance firm in …

The Relationship Between Emotional Intelligence And Reading Comprehension In High School Students With Learning Disabilities, Helen C. Bryant

Dissertations

Problem. Research indicates that students who receive an exclusively academic education that does not include emotional intelligence skills may not be prepared for future challenges of the 21st century because traditional intelligence contributes to only 20% of the factors that determine life success. Students with learning disabilities have average or above average cognitive intelligence. However, many do not demonstrate academic and social behaviors that normally would be compatible with average intelligence. Even though their cognitive intelligence has been tested, their emotional intelligence has not been tested. The purpose of this study was to investigate the relationship between emotional intelligence and …

Codependency In Master's-Level Counseling Students, Terri Lynne Pardee

Dissertations

Purpose of the Study

The purpose of this study was to examine codependency in master’s-level counseling students, to determine if there was a significant difference between incoming and exiting students, and to investigate codependency as related to age, gender, and religious preference.

Method

The Codependency Assessment Tool was administered to 275 Spring Arbor University master’s-level counseling students to measure codependency in five core areas: Other Focus/Self-Neglect, Low Self-Worth, Hiding Self, Medical Problems, and Family of Origin Issues.

Results

Respondents’ CODAT mean score showed a minimal level of codependency. There were no significant differences between incoming and exiting students on the …

Predicting Repeated Sexual Behavior Problems Among Youth: A Hierarchically Optimal Classification Tree Analysis, David J. Morgan

Dissertations

This study examined characteristics of youth with sexual behavior problems (N = 251) followed over approximately two years and applied Classification Tree Analysis (CTA) via Optimal Data Analysis (ODA) to produce a hierarchically optimal classification model to predict recurrence of SBP over time. This study was designed to address problems with clinical judgment leading to inaccurate diagnosis and in some cases, incorrect treatment or placement of the youth by ascertaining if an actuarial model designed to optimize classification accuracy might be more helpful in directing diagnosis and treatment for these youth. Results suggest initial event severity influences the potential for …

Using Gis To Assess Ireland's Knowledge Economy And Its Readiness For Knowledge Based Activity, Niall Mcguinness

Dissertations

The attractiveness of emerging low wages economics to primary industries such as manufacturing and production is forcing many western economies to transition to knowledge economies. In the absence of many forms of primary industry lost to low wage economies, the European Union and its members are fast realising the importance of attracting knowledge based enterprise in order to maintain Europe’s economic climate. Ireland too has a stated aim to become a knowledge economy by the year 2010. This can be achieved by investing in higher education and attracting knowledge industry to the country. Ireland has made some progress to achieving …

Transition Activities And Their Effects On Middle School Students, Vicki Sue Vanlaere

Dissertations

The purpose of this study was to determine the effectiveness that transitional activities have on student achievement and attendance when students moved from elementary school to middle school. The data were gathered from two school districts that are demographically similar. Data included average daily attendance rates, Terra Nova Achievement Scores from social studies in grades five, six, and seven, as well as math in grades five, six, and seven. There were 187 students in the Treatment Group and 147 in the Control Group for a total of 334 students. Comparison of means for demographic equivalency of the groups (t-test) and …

Retaining Information Technology Employees In Higher Education, Mary Holmes

Dissertations

The retention of qualified Information Technology (IT) employees is at an all time low within higher education institutions. IT personnel are essential for higher education institutions to effectively integrate technology into their educational programs. These IT employees contribute to their institution's teaching/learning mission, while simultaneously supporting complex and highly visible administrative operations. Yet, all previous research regarding IT employee retention issues had only been conducted within corporate settings.

To examine factors related to IT employees' retention within public higher education, an internet-based study was sent to IT employees in all four-year public universities throughout Michigan. The survey included questions within …

African American Father-Child Reproductive Health Communication, Nnenna Ohalete Phd

Dissertations

African-American children have their sexual debut (first voluntary penile-vaginal penetration) earlier thus are at disproportionately greater risk for more sexual partners and sexually transmitted infections. Father-child reproductive health communication was found to influence the timing of sex in other children however, a dearth of studies in African-American fathers existed. In this qualitative study reproductive health communication was explored in tape-recorded interviews of 19 African-American fathers from the perspective of critical theory, with the use of critical ethnography as methodology. How the content and pattern of reproductive health communication influenced sexual debut, and how fathers' moral/ethical stances influenced reproductive health communication …

Decision Support Systems In Product Development: A Batesian Network Approach For Injection-Molded Products, Jason S. Trahan

Dissertations

Attribute defects cause a majority of the scrap for many manufacturers injection-molding aesthetic parts, yet these defects receive little attention duringproduct development. Methods for preventing attribute defects have been hampered by the inability to quantify complex cause-effect relationships. However, the qualities of a burgeoning branch of knowledge-based systems, called Bayesian networks, have benefited various fields faced with similar circumstances.Bayesian networks have the capability of presenting causal relationships between variables in a graphical structure and quantitatively explaining their effects throughout that structure. These effects can be characterized by probabilities derived from sources, such as equations, historical data, rules-of-thumb or expert knowledge. …

The Cover-Up Is More Damaging Than The Sin: Sexual Scandals At The Cabinet And Sub-Cabinet Levels, Craig Korpela

Dissertations

Based on the sexual scandals of Alexander Hamilton, John Eaton, Sumner Welles, and the recently concluded investigation of Henry Cisneros, this research provides an initial, and subsequently revised, set of phases and factors that describe sex scandals of Cabinet and sub-Cabinet secretaries. Garnered from these historical cases and other scandal literature are factors that impact the development of a sex scandal. Presidential support, traits of the indiscretion, relationships between executives, public opinion, legal matters, Congressional oversight, and efforts to cover-up a sexual affair are just a few of the factors that could impact the tenure of an appointee.

Sustainable Barrier Sbs Paperboard Coatings Using Co-Polymerized Shape Engineered Pigments, Lokendra Pal

Dissertations

This study concentrates on the development, application, characterization and optimization of shape engineered pigments and co-polymerized sustainable coatings to provide solid bleached sulfate (SBS) board with a barrier against water, water vapor, and gasses. In contrast to off-line extrusion coating with unsustainable petroleum based products, conventional and co-polymerized shape engineered pigmented dispersion coatings were used to improve barrier, surface, optical and mechanical properties of an SBS board.

It is very important for package and quick-service wares made from coated SBS board to maintain barrier and mechanical properties at high humidity and temperature applications. The coated SBS board package should protect …