Digital Commons Network^™

Experiences Of Michigan Elementary National Board Certification Candidates, Kristen L. Dewitt

Dissertations

Since 1987, over 55,000 teachers have achieved National Board Certification (NBC), which is claimed to be the highest symbol of teaching excellence and an identifier of accomplished teaching. To become certified, teachers must demonstrate a clear understanding of rigorous standards as defined by the National Board for Professional Teaching Standards.

This phenomenological study examined ten Michigan elementary National Board Certified Teachers and candidates in hopes of better understanding the roles that motivation, support and pressure played in their decisions to seek NBC, and the influence the process had on their teaching. Four critical findings were identified.

The first critical finding …

Navigating Barriers Of African American Male Administrators: Manifesting Mechanisms For Career Advancement In Mainstream Institutions Of Higher Education, Orlando Lewis

Dissertations

The overall goal of this qualitative case study was to provide information to African American males regarding barriers they are challenged to navigate for career advancement at mainstream institutions of higher education. I utilized semi structured interviews to: (1) determine what barriers face African American male administrators in higher education that prevent advancement to executive positions; (2) identify and detail ways in which African American male administrators successfully navigate the barriers and; (3) identify coping mechanisms and support systems to aid African American men to navigate the identified barriers.

I identified three themes of barriers that reflect the route of …

Characterization Of Molecular Events Following Heavy Metal Cadmium Exposure: A Cellular Regulatory Symphony In Response To Early Cadmium Insult, Chin-Ju Jean Hsiao

Dissertations

Cadmium, a non-essential toxic heavy metal, has been classified as a human carcinogen and one of the most hazardous substances in our environment. Since it can circulate within the food chain, has a long biological half-life and can bio-accumulate, it has the potential to induce detrimental health effects linked to toxicity, cancer and chronic diseases.

In recent years progress has been made to dissect and understand the molecular mechanisms underlying the effects of cadmium exposure. However, few studies have focused on investigating potential protective and/or defense mechanisms naturally applied by cells upon initial exposure, prior to any damage or toxic …

Inelastic X-Ray Scattering Studies On Organic Semiconductors And Organic Superconductors, Chaminda Nalaka Kodituwakku

Dissertations

We have measured electronic excitations and excitons in CuPc polycrystalline and single crystal samples. Measurements on the polycrystalline sample were done with 300 meV resolution and measurements on the single crystal were done using 120 meV resolution. Time dependant density functional theory (TD-DFT) calculations were done on the CuPc molecule to understand the electronic excitations in this system.

Some Applications Of Gaussian Quadrature And Neural Network Modeling In Earth Flows And Other Slow-Moving Landslides In Cohesive Slope Materials, Rennie Bwalya Kaunda

Dissertations

Geometrical changes and progressive displacements in earth flows and other slow moving landslides triggered by climatic changes may be addressed by digital modeling. Gaussian quadrature, a numerical integration technique though fixed points, is employed to compute geometrical areas defined by stratigraphic (soil or rock layering) units, vertical pole projections and a slip surface, based on kinematic admissibility. An example from the Lake Michigan coast shows that the total internal geometrical area is found to be preserved during the course of the progressive deformation. Displacement monitoring of the slope shows that it became less stable over a period of eleven years …

The Global Hepatic Transcriptional Response Of Male Fisher Rats To Dietary Aroclor 1254 Exposure, Trisha M. Basford

Dissertations

Dietary intake is a primary route for biomagnification of environmentally persistent polychlorinated biphenyls (PCBs) within humans and animals. Aroclor 1254, a mixture of PCBs, is associated with a variety of toxic responses including alterations in blood and lipid biochemistry and tumor promotion. Measurement of the transcriptional responses to low-level dietary exposure to A1254 has not been reported to date, and is important given the persistence of PCBs, and range of effects associated with exposure. The aims of this study were to characterize changes in rat hepatic global gene expression due to sub-acute and sub-chronic dietary exposure to A1254, and to …

Struggling With Race: A Grounded Theory Study Of The Developing Of Awareness Of Racism, Shawn Victoria Macdonald

Dissertations

White counselors and psychologists need to have a strong understanding of racism and white privilege for effective therapeutic work with people of color. However, many white counselors struggle in various ways with multicultural training. The phenomenon of white counselors in training struggling with awareness of racism and white privilege is well-recognized but not fully understood.

A constructivist grounded theory study was conducted to explore the phenomena of "struggle" among white counselors in training who were engaged in multicultural training. 33 interviews were conducted with 17 participants who were students in master's and doctoral level counseling, counseling psychology, and related programs. …

Structure-Function Studies Of Self- Assembling Flagellin Proteins Fromsalmonella Typhimurium And Aquifex Pyrophilus, Venkata Raghu Ram Malapaka

Dissertations

The eubacterial flagellum is a complex structure with an elongated extracellular filament that is primarily composed of a single protein termed flagellin. The highly conserved N-and C- termini of flagellin are important in its export and assembly, whereas the middle "hypervariable" region is highly variable in size across different species and is largely dispensable. InSalmonella typhimurium phase 1 flagellin (FliC), this hypervariable region encodes two solvent-exposed D2 and D3 domains. The functional role of this knob-like structural feature in motility remains unclear. The structural and physiological role of the hypervariable region in flagellar assembly, stability and cellular motility was investigated. …

The Impact Of Combined Maternal Alcohol And Tobacco Use On Low Birth Weight In Singleton Pregnancies : A Population Based Study In The Us, 2003, Della A. Campbell

Dissertations

Background: The Black-White disparity in birth outcomes in the United States remains embedded. The World Health Organization (WHO) defines low birth weight (LBW) as birthweight less than 2500 grams/5.5 pounds or below the 10th percentile for gestational age. LBW is a frequent marker of poor maternal/infant health outcome. A reduction in the incidence of LBW is a major public health initiative in the US. Objective: The objective of the study was to determine the magnitude of risk for low birth weight, defined in this study as neonatal birth weight less than 2500 grams, in relation to combined maternal alcohol and …

Prediction Of Mrna Polyadenylation Sites In The Human Genome And Mathematical Modeling Of Alternative Polyadenylation, Yiming Cheng

Dissertations

Messenger RNA (mRNA) polyadenylation plays many important roles in the cell, such as transcription termination, mRNA stability and transportation, and mRNA translation in eukaryotic cells. A large number of human and mouse genes have multiple polyadenylation sites (referred to as poly(A) sites) that lead to variable transcripts, some of which are translated into various protein products with different functions. However, the details about when and where the polyadenylation occurs, and how pre-mRNA switches from one poly(A) site to another are still unknown. This kind of 3 '-end processing can be regulated by the cell environment, cell cycle stage, and tissue …

Direct Simulations Of Cells Motions And Deformations In Flow, Quan Jin

Dissertations

Direct numerical simulations (DNS) are used to study the motions and deformations of blood cells, especially leukocytes, in pressure driven flows in parallel plate channels with both smooth and uneven walls under adhesion force between the leukocytes and the channel wall.

Leukocytes are represented by two composite fluid models. The first model is the compound-drop model in which the cytoplasm and the nucleus are modeled as fluids, and the second one is the drop-rigid-particle model in which the cytoplasm is modeled as a fluid and the nucleus as a rigid particle. The adhesion force is computed using two adhesion force …

Formation Of Rdx Nanoparticles By Rapid Expansion Of Supercritical Solution : In Situ Characterization By Laser Scattering, Takuya Matsunaga

Dissertations

Cyclo-1,3,5-trimethylene-2,4,6-trinitramine (RDX), a well-known energetic material, is highly explosive. Reduction of the sensitivity of RDX is desired for safe handling and

storage in military applications. Data on the sensitivity of RDX in the 10-1000 µm crystal size range suggested that the impact sensitivity could be further reduced by reduction of the crystal size to the sub-micron or nano-scale (Armstrong, 1990). Recent research with nano-RDX obtained using Rapid Expansion of Supercritical Solutions (RESS) confirmed these expectations (Stepanov, 2005).

RESS process appeared to be one out of a few techniques of production of nanoscale energetic materials free of the risk of explosion. …

Ligand-Based Drug Design : I. Conformational Studies Of Gbr 12909 Analogs As Cocaine Antagonists; Ii. 3d-Qsar Studies Of Salvinorin A Analogs As Kappa Opioid Agonists, Deepangi Pandit

Dissertations

Ligand-based drug design (LBDD) techniques are applied when the structure of the receptor is unknown but when a series of compounds or ligands have been identified that show the biological activity of the interest. Generally, availability of a series of compounds with high activity, with no activity, and also with a range of intermediate activities for the desired biological target is required. It is common that structures of membrane-bound proteins (for example, monoamine transporter proteins and opioid receptor proteins) are unknown as these proteins are notoriously difficult to crystallize.

In Part I of this study, analogs of the flexible dopamine …

Central And Peripheral Autonomic Influences : Analysis Of Cardio-Pulmonary Dynamics Using Novel Wavelet Statistical Methods, Anne Marie Petrock

Dissertations

The development and implementation of novel signal processing techniques, particularly with regard to applications in the clinical environment, is critical to bringing computer-aided diagnoses of disease to reality. One of the most confounding factors in the field of cardiac autonomic response (CAR) research is the influence of the coupling of respiratory oscillations with cardiac oscillations.

This research had three objectives. The first was the assessment of central autonomic influence over heart rate oscillations when the pulmonary system is damaged. The second was to assess the link between peripheral and central autonomic control schema by evaluating the heart rate variability (HRV) …

In Vitro Studies Of Degradation And Bioactivity Of Aliphatic Polyesther Composites, Georgia Chouzouri

Dissertations

In spite of numerous publications on the potential use of combinations of aliphatic polyester composites containing bioactive fillers for bone regeneration, little information exists on the combined in vitro mechanisms involving simultaneously diffusion for polymer degradation and bioactivity through nucleation and growth of apatite in simulated body fluid (SBF) solution. The objective of this study is to contribute to the understanding of the fundamentals in designing non-porous, solid materials for bone regeneration, from experimental data along with their engineering interpretation.

Bioactivity, in terms of apatite growth, was assessed through several experimental methods such as scanning electron microscopy (SEM), energy dispersive …

Comparative Immune Function In Wild Birds, Kevin David Matson

Dissertations

Over the last several decades, interest in quantifying immune function in comparative studies of wild animals has grown appreciably. Now, the field of ecological immunology is undergoing a transition, and ¿second generation¿ studies are being designed and carried out. With a greater appreciation of the complexity of immune systems, these second generation studies are commonly distinguished from their antecedents by making comparisons using multiple assays and including multiple species. I worked to advance this transition by developing novel approaches to comparative immunology, exploring the interrelationships among indices of immune function, and applying multiple indices to a question of comparative avian …

The Role Of Local And Regional Factors In The Foraging Ecology Of Birds Associated With Polylepis Woodlands, Grace Patricia Servat-Valenzuela

Dissertations

Understanding the extent to which patterns of functional structure are repeated in space and the scale at which different factors (local and regional) operate to explain community patterns are of important in community ecology. I studied the extent of spatial variation in foraging ecology of birds in the Polylepis community, a vegetation system of the Andes, in regard to variation in local (vegetation structure, floristic composition, food resources) and regional factors (biogeography). Specifically, I studied foraging ecology of nine insectivorous bird species (and the assemblage they conform) across twelve disjunct woodlands embedded in three biogeographic regions of the Peruvian Andes. …

Transition To Nursing Home Of Korean-American Elders, Myungja Kim Hahm Phd

Dissertations

The purpose of this study was to explore factors affecting Korean-American (KA) elders during the transition to nursing homes in the first month following admission. The three aims of this proposed study were (1) to explore culture specific factors that affect KA elders' perspectives during the transitional period to a nursing home, (2) to identify thoughts and feelings of KA elders about their admission into a nursing home, (3) to describe the adjustment process associated with admission to a nursing home. A grounded theory design was utilized to explore KA elders' perceptions/experiences associated with adjustment to a nursing home. Open-ended, …

Examining Stage Theories And The Predisposition To Lead Within The Homosexual Community, David Robert Blair Edd

Dissertations

An application of homosexual stage-based self-integration theory suggests that until gay individuals have become fully self-integrated, their capacity for leadership within the community is diminished. Unfortunately, now more than ever before, leadership is needed in dealing with such pressing community issues as the disproportionately high suicide rate among gay teens, the ongoing struggle for gays to become fully self-integrated individuals, bringing equal rights to the gay population, and of course, developing a base of strong gay leaders to meet the ongoing challenges facing this population. To test the self-integration-leadership hypothesis, this study surveyed 150 men in gay Internet chat rooms …

Emerging Elements Of Leadership In A Complex System: A Cognitivist Approach, Kirsten Suzanne Hanson Edd

Dissertations

As our world grows increasingly complicated at an intensified pace, leaders must be facile managers of complexity if organizations and society are to productively and peacefully evolve. Today’s global corporations are microcosms of complexity and have the potential to affect life for almost all other species. However, many organizations have not yet become aware of themselves as “living” and still operate as industrial age institutions with rationalist thinking traditionally dominating management practice. Many factors impact an organization’s overall effectiveness. Yet, executive leaders are seen as having the ability to influence change and play a vital role in helping people navigate …

Bioengineering Of Protein Nanotubes And Protein Nanomaterial Composites, Thilak Kumara Mudalige

Dissertations

Flagella of Mesophilic bacteria such as E. coli are extremely ordered structures consisting of self-assemblies of flagellin 11-mers resulting in protein nanotubes of 2--3 nm inner diameter, 23 nm outer diameter, several microns in length and 5.4 nm separation between 11-mer segments. They are as a result attractive scaffolds and templates for the generation of uniform nanotubes and ordered array of nanoparticles. In this study fusion protein of bacterial flagellin (Fli C) and core thioredoxin (Trx), pFliTrx was used as peptide display on bacterial flagella. This was accomplished in the current research by introducing various peptide loops such as cysteine, …

Psychometric Testing Of The Walker's Feelings And Thoughts About Weight Scale In Taiwan, Shu-Wen Chang Phd

Dissertations

Background: The majority of women do not return to their pre-pregnant weight after six weeks postpartum in Taiwan. Excessive postpartum weight retention or gain can lead to long-term obesity and increase a woman's risk of major health problems. Trends among Taiwanese women reveal an increasing prevalence of obesity. Limiting postpartum weight retention is important for preventing long-term obesity development. Objectives: The purpose of this study was to examine predictors of postpartum weight gain among Taiwanese women using the modified Thriving Model (Walker & Kim, 2002) as the guiding conceptual framework and to examine the psychometric properties of a Chinese Version …

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 …

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 …

Autobiography As Counter-Narrative: An Empirical Study Of How Race Enters And Structures The Stories Of Our Lives, Wendy B. Yanow

Dissertations

The primary purpose of this study was to learn about how race enters and then structures the narratives of our life experiences. Critical Race Theory (CRT) was used as a lens through which to examine learning autobiographies and the CRT methodology of counter-storytelling was used to illustrate the ways in which race enters and structures the stories of our lives.

The data consist of personal narratives written by adult students who were not asked to consider their life experiences from a racialized perspective. That resulted in a level of authenticity of their voices. Analyzing the learning autobiographies through a CRT …

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 …

Geophysical Monitoring Probes And Their Applications To Some Hydrogeological Problems, Laura Smart

Dissertations

Geophysical monitoring probes were constructed to monitor the vertical changes of water content and ion concentration in the subsurface. These devices contain electrodes for resistivity measurements and thermistors for temperature measurements. They are designed to monitor the resistivity and temperature of the saturated zone, the transition zone, and the vadose zone near a groundwater/surface water interface. Additional installations at the site include four monitoring wells and four Time Domain Reflectometry (TDR) access tubes, each paired with the geophysical probe installations. Pole-Pole resistivity measurements with an a-spacing of 5 cm are made using a CR1000 Campbell Scientific, Inc. datalogger. Automated data …

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, …

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 …

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 …