Digital Commons Network^™

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 …

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. …

Investigation Of Oxy-Anion Legand Adsorption Onto Surfaces Of Iron Oxide And Bacteria In Groundwater Aquifers, Haile Mengistu

Dissertations

We have measured adsorption of dissolved phosphate onto synthetic hydrous ferric oxide (HFO), dissolved arsenate and chromate onto the cell membrane of a bacterium species, S. putrefaciens as a function of pH, ionic strength, and relative concentrations of the respective oxy-ligands. Our experimental data were used to constrain optimal values for surface complexation reactions involving dissolved oxi-ligands (phosphate, and chromate) and the HFO surface and the cell membrane of S. putrefaciens respectively according to the diffuse layer model.

Our results provide a more accurate fit to experimental measurements over a broader range of pH (3 - 12), ionic strength and …

New Tests Of Univariate Symmetry Based On The Gini Mean Difference, Hend Ouda

Dissertations

Gini mean difference (GMD) was proposed as a measure of income inequality by Corrado Gini in 1912. Since then it has been widely applied - mostly in theeconomics, but also in statistical and social science research.

Four statistical tests of univariate symmetry are being proposed---all based on the comparison of variation below and above the median (known or estimated) measured by the GMD. These tests are applicable to the data from populations with median known and unknown, and each of them has its rank-basedcounterpart, so they can also be used for ordinal data.

A Monte Carlo simulation study was performed …

Funding Michigan K-12 Educational Adequacy Without Rewarding Inefficiency, James J. Walters

Dissertations

Resource equalization represents the historical and theoretical basis for American school finance and its ideals continue to dominate discussion and practice. During the last decade and a half, the national aspiration for equitable distribution of school finance resources has started a transformation into a derivative notion of adequacy. This equity policy derivative embraces the idea of sufficiency, which in turn implies a standard. The concept of educational adequacy has grown to mean the achievement of high absolute standards. Equity (equalization) theorists measure resource level on a relative basis; each student relative to all others. Adequacy adherents measure student achievement against …

Synthesis And Fundamental Characterization Of Nanoparticles And Their Clusters, Ke Du

Dissertations

Nanoparticles of gold derivatized with monolayers of thiocarboxylic acid ligands, core/shell nanoparticle composites of gold and silica, gold-glutathioneclusters, and titania nanoparticles were synthesized and their surface properties (extent of ligand coverage, net negative charge, and zeta potential) characterized by capillary electrophoresis as a function of pH, ionic strength, and dielectric constant for the first time. The hydrodynamic radii of thenanoparticles were determined by dynamic laser light scattering and used to calculate the net surface charge, extent of ligand coverage, and zeta potentials ofthe nanoparticles from electrophoresic mobilities. The ligand derivatized nanoparticles had similar hydrodynamic radius of about 20 nm which …

Religion And Semiosphere: From Religious To The Secular And Beyond, Rajka Rush

Dissertations

Religion is a system of structural ideas that involve the natural ability of the mind to engage itself into the process of unlimited semiosis which can be defined as an existential openness of one's consciousness to the universe as a system. This primary religious consciousness becomes limited by language, symbolic, and cultural constraints. The religious semiotic space is a sub-cultural system open to culturally and cross-culturally encoded idioms and concepts. These cultural potentials are interpreted and settled by the religious exegesis expressed in the behavioral patterns of the symbolic actions that reflect a specific worldview of the closed community controlled …

Analyzing The Effects Of Inquiry-Based Instruction On The Learning Of Atmospheric Science Among Pre-Service Teacher Education Students, Robert James Ruhf

Dissertations

This study tested whether or not pre-service teacher education students enrolled in inquiry-based earth science courses gained more thorough knowledge, comprehension, and application proficiencies with regard to atmospheric science concepts included in the Michigan Curriculum Framework for Science Education---the content standards of the Michigan State Board of Education for K-12---than did pre-service teacher education students enrolled in a traditionally-based earth science lecture/laboratory course. Content proficiencies were tested at the beginning of the semester (the pretest) and again at theend of the semester (the posttest). A sample of students participated in post-test interview sessions designed to examine in depth their knowledge, …

Family Functioning And Career Decision-Making Self-Efficacy: A Study Of First Year Malaysian Undergraduate Students, Melati Sumari

Dissertations

The findings of the study show that the relationships between family functioning subscales and career decision-making self-efficacy subscales were between small and moderate. The study also found that each family functioning subscale contributed less than 15% of the variance in career decision-making self-efficacy. The total variance accounted for by the six family functioning subscales was small (32%). Important findings of the analyses of variances include: (a) male students perceived their families as more dysfunctional than female students; (b) Chinese students perceived their families as more dysfunctional than Malay and Indian students; (c) students in science majors perceived their families as …

A Case Study Of The Efficacy Of A University Cohort Group In A Small Urban School District, Ann Rea Kopy

Dissertations

The purpose of this case study was to explore the processes followed in an educational partnership and to describe the changes in the participants' beliefs, practices, and sense of efficacy as a result of their participation. This study described and analyzed an educational partnership between a large university and the staff of a small, urban school district. The goals of the partnership were to provide the participants the knowledge to enhance student achievement as well as to develop educational leaders throughout the district. The participants consisted of educators of the district that enrolled in the educational partnership that existed for …

Teaching Music Theory In The Traditional Wind Band Rehearsal: A Rationale, Survey Of Materials, And Recommendations, Eric Lynn Harris

Dissertations

Band programs in today’s schools are facing pressures unheard of in the early days of the public school band movement. While budget limitations have always been a part of the public school dilemma, never before have directors been forced to fight so hard for the very existence of their programs. School administrators facing district, state, and federal testing pressures are spending more and more of the annual budget in an attempt to raise test scores. This means programs in the arts and even athletics are being greatly reduced (and in some cases eliminated) in school systems across the country. To …

Regulation Of A Dna-Compacting Plastid Nucleoid Protein, Steven William Adamson

Dissertations

DCP68, a DNA-compacting nucleoid protein, was further characterized in order to understand how plastid nucleoid proteins affect the structure and function of chloroplast DNA. Previously, DCP68 was identified as ferredoxin: sulfite reductase, an enzyme that participates in reductive sulfur assimilation and inhibits chloroplast DNA replication and transcription in vitro [1, 2]. In this study, the portion of SiR that was found to be present in soluble and plastid nucleoid-enriched fractions indicated that most SiR was stromal in Arabidopsis and soybean plants. Although SiR was detected in Arabidopsis chloroplast nucleoid-enriched fractions, the study of nucleoid dynamics proved to be difficult due …

Beholding The Beauty Of Self: The Psychological Integration Of The Afrocentric-Self Among African-American Females Socialized In A Eurocentric Aesthetic, Donna Lynn Cook Phd

Dissertations

Self-esteem and body image disturbances prominently figure into many physical and psychological health disorders such as depression, eating disorders, anxiety disorders, and chemical dependency. In Euro-American culture, media images of femininity and physical attractiveness reinforce generally held perceptions of the idealized female beauty as tall, white, slender, and often blond and blue eyed. The physical morphology of African-American women does not genetically "fit" this westernized standard of beauty with implications for their mental health. The socialization of African-American women in a culture that embraces a different ethnic standard of beauty influences their perceptions of how physically attractive they see themselves. …

The Viability Of Is Enhanced Knowledge Sharing In Mission-Critical Command And Control Centers, Sameh A. Sabet

Dissertations

Engineering processes such as the maintenance of mission-critical infrastructures are highly unpredictable processes that are vital for everyday life, as well as for national security goals. These processes are categorized as Emergent Knowledge Processes (EKP), organizational processes that are characterized by a changing set of actors, distributed knowledge bases, and emergent knowledge sharing activities where the process itself has no predetermined structure. The research described here utilizes the telecommunications network fault diagnosis process as a specific example of an EKP. The field site chosen for this research is a global undersea telecommunication network where nodes are staffed by trained personnel …

Constitutive Modeling Of The Thermo-Mechanics Associated With Crystallizable Shape Memory Polymers, Gautam Barot

Dissertations

This research addresses issues central to material modeling and process simulations. Here, issues related for developing constitutive model for crystallizable shape memory polymers are addressed in details. Shape memory polymers are novel material that can be easily formed into complex shapes, retaining memory of their original shape even after undergoing large deformations. The temporary shape is stable and return to the original shape is triggered by a suitable mechanism such heating the polymer above a transition temperature. Crystallizable shape memory polymers are called crystallizable because the temporary shape is fixed by a crystalline phase, while return to the original shape …

Feasibility Of Superconductivity In Semiconductor Superlatices, Kenneth P. Walsh

Dissertations

The objective of this thesis is to explore superconductivity in semiconductor superlattices of alternating hole and electron layers. The feasibility of superconductivity in semiconductor superlattices is based on a model formulated by Harshrnan and Mills. In this model, a semiconductor superlattice forms the layered electron and hole reservoirs of high transition temperature (high-Tc) superconductors.

A GaAs-A1xGa1-xAs semiconductor structure is proposed which is predicted to superconduct at Tc = 2.0 K and may be analogous to the layered electronic structure of high-Tc superconductors. Formation of an alternating sequence of electron- and hole-populated quantum wells (an electron-hole superlattice) in a modulation-doped GaAs- …

Analytical Model For Staging Emergency Evacuations, Vivek V. Korikanthimath

Dissertations

Disaster response in areas of high population density is centered on the efficient evacuation of people and possibly goods. Developing evacuation plans suitable for different levels of urgency based on the intensity of threat is a challenging task. In case of densely populated cities (e.g., New York, Los Angeles), the level of threat is enhanced by the congestion of their transportation systems, and the decision to evacuate a region simultaneously or by dividing it into multiple stages (or zones) affects the required evacuation time and associated delays.

The evolution of the traffic conditions on the evacuation route can vary significantly …

Selected Problems Of Inference On Branching Processes And Poisson Shock Model, Satrajit Roychoudhury

Dissertations

This dissertation explores the development of statistical methodology for some problems of branching processes and poisson shock model.

Branching process methods have become extremely popular in recent days. This dissertation mainly explores two fundamental inference problems of Galton-Watson processes. The first problem is concerned with statistical inference regarding the nature of the process. Two methodologies have been developed to develop a statistical test for the null hypothesis that the process is supercritical versus an alternative hypothesis that the process is non-supercritical. Another problem we investigate involves the estimation of the 'age' of a Galton-Watson Process. Three different methods are discussed …

A Comparison Of Achievement Levels In Mathematics And Science, And Current Attitudes, Of Secondary Students In A Six-Period Daily Schedule, With Those Of Students In A Rotate-Eight Block Schedule, Brad J. Heger

Dissertations

In part one of this study, secondary students¿ mathematics and science achievement levels in a Six-Period Daily (SPD) schedule were compared with those in a Rotate-Eight Block (REB) schedule (eight macroperiods in a two day rotation). In part two, alumni were surveyed to compare current opinions of the schedules¿ effectiveness overall and on two subscales. Archival test data and demographic information were obtained on two graduated classes in a selected suburban Midwestern high school, enrollment grades 9 to 12 of approximately 1000 students. Stratified random samples of 50 students from each class were selected based upon treatment, academic ability, ethnicity, …

Investigating Professional Development In Technology For Literacy Teachers, Michanne Hoctor Edd

Dissertations

Citrus Heights (a pseudonym) School District is an award-winning exemplar of technology integration. This small urban district has focused its resources on the re-design of its K-8 classrooms and curriculum to support educational reform through the use of technology, including hardware, software, and teacher professional development. Current best practices suggest that while staff development may begin with conventional in-service training, it should move quickly beyond to efforts that support teachers’ development as professionals involved in decision-making, inquiry, and leadership in their classroom teaching. In order to develop as professionals, teachers specifically need help and support in integrating new knowledge and …

The Effect Of Using A Video-Case Curriculum To Promote Preservice Teachers’ Development Of A Reflective Stance Towards Mathematics Teaching, Shari L. Stockero

Dissertations

This study investigates the effects of using a coherent video-case curriculum in a university methods course. In particular, three issues are addressed: (1) howthe use of a video-case curriculum affects the reflective stance of preservice teachers; (2) the extent to which a reflective stance developed while reflecting on other teachers' practice transfers to reflecting on one's own practice; and (3) how preservice teachers' reflective stance that is developed via sustained and focused reflection using a video-case curriculum compares to the reflective stance of peers who engaged in less sustained and focused reflection. Althoughvideo cases are increasingly being used in teacher …

Markov Chain Monte Carlo Methods For Regression Splines With A Penalized Acceptance Ratio, David Keith Stamps

Dissertations

An increasingly popular method for fitting complex models, particularly with a hierchical structure involvese the use of Markov Chain Monte Carlo simulation. Within a Bayesian framework, two major strategies are Gibbs sampling and Metropolis-Hastings methods. Recent research in the area of MCMC methods has witnessed the emergence of modeling efforts which permit the movement of the chain across models of varying dimensions. When properly constructed, such Markov chains converge to the joint posterior distribution of the parameters to be estimated, making Bayesian averaging an attractive option after convergence has occurred. With this transdimensional methodology, the Bayesian averaging process takes place …

The Effects Of Rumination On Problem-Solving Self-Efficacy And Self-Efficacy For Controlling Upsetting Thoughts In The Context Of Depressive Symptoms, Christina Marcia Gilliam

Dissertations

Two cognitive variables that are of interest in their role in depression are self-efficacy and rumination. Self-efficacy refers to individuals¿ own appraisal of their ability to successfully accomplish a domain of tasks (Bandura, 1977). Rumination, as defined by Response Styles Theory (Nolen-Hoeksema, 1991), refers to the process of repetitively and passively thinking about negative emotions, consequences, and symptoms of distress. Although the relationship between these two constructs and depression has been examined in both experimental and correlational studies, there has been minimal research on the relationship between self-efficacy and rumination among depressed individuals. The present study was intended to replicate …

Image Segmentation By Energy And Related Functional Minimization Methods, Eric Hudson Mason

Dissertations

Effective and efficient methods for partitioning a digital image into image segments, called ¿image segmentation,¿ have a wide range of applications that include pattern recognition, classification, editing, rendering, and compressed data for image search. In general, image segments are described by their geometry and similarity measures that identify them. For example, the well-known optimization model proposed and studied in depth by David Mumford and Jayant Shah is based on an L₂ total energy functional that consists of three terms that govern the geometry of the image segments, the image fidelity (or closeness to the observed image), and the prior …

Teacher Leadership In Community Colleges: Transforming Teaching And Organizational Governance, Pamela Miller

Dissertations

The purpose of this study was to describe and interpret the experiences of community college teachers in order to understand their perception of theirleadership role and the impact of teacher leadership on institutional governance and student success. This research addressed gaps in the teacher leadershipliterature by contributing a quantitative analysis of the leadership perceptions of community college faculty. The results of the study should be of interest tocommunity college faculty and administrators, teacher educators and teacher preparation institutions, and policy makers as they work to implement change efforts related to curriculum and instruction, professional development, institutional leadership, and governance.

Chapter …

Audio Narration And Reading Ability In Programmed Instruction, Wendy Jaehnig

Dissertations

This study compared the effects of audio, textual, and audio-textual narration in a programmed instructional module on the performance of individuals with different reading abilities. One hundred eighty-four college students were randomly assigned to audio, textual, or audio-narration. Dependent variables were posttest score and instruction completion time. An ANCOVA was used to analyze the results, with ACT reading test scores as the covariate. No differences were found between the groups on posttest scores (p = .56) or completion time (p = .90), and there was no interaction between narration type and reading score for either dependent variable. Audio …

Detectable Coloring Of Graphs, Henry E. Escuadro

Dissertations

A basic problem in graph theory is to distinguish the vertices of a connected graph from one another in some manner. In this study, we investigate the problemof coloring the edges of a graph in a manner that distinguishes the vertices of the graph. The method we use combines many of the features of previously introduced methods.

Let G be a connected graph of order n ≥ 3 and let c : E (G ) [arrow right] {1,2,...,k } be a coloring of the edges of G (where adjacent edges may be colored the same). For each vertex …

A Distributed Hierarchical Energy-Efficient Scheme For Large Scale Mobile Wireless Ad Hoc Networks, Wasim El Hajj

Dissertations

In recent years, wireless networks have enjoyed tremendous development and popularity due to the technological advances of wireless radio devices. While interest in conventional wireless networks continues to evolve, new types of wireless networks, such as Mobile Ad Hoc Networks (MANET) and WirelessSensor Networks (WSN) are evolving fast and receiving much attention from academia, industry, and government.

Scalability and energy-efficiency present two of the most important challenges in Mobile Ad Hoc Networks. Scalability in MANETs can be defined as the capability of the network to provide an acceptable throughput when the network size increases. Energy-efficiency can be defined as using …

Ink Jet Inks And Substrates - Novel Approaches For Their Physical And Optical Properties Characterization, Veronika Lovell

Dissertations

Undoubtedly, within the last couple of decades, the progress in non impact printing technologies has grown to an enormous level. In order to keep the development of this non impact printing method to grow even more, technicians, researchers and educators must continue in conducting investigation and provoking new ideas and questions that will lead to new outcomes and expansion of ink jet printing.

In this work, a broader area that comprises deep look into the ink jet ink and substrate performance, their physical properties and optical properties when printed is discussed in great details. Innovative techniques, novel materials and novel …

Robust Kanban Design For A Lean Supply Chain, Hardik Shah

Dissertations

This research concentrates on the inventory management decisions within an assembly-type supply chain. The need for this type of investigation is warranted by the fact that intense competition and heightening demand from customers have forced businesses to focus their attention on strengthening their supply chains. The problem is that in any supply chain, there are many factors involved that cause variations and instability within the system. Previous literature indicates that the manipulation of a Kanban system in today's uncertain environment generates unfavorable results. Consequently, the goal is to find a Kanbanmethodology that would produce robust and consistent results even when …