Digital Commons Network^™

Structure Borne Noise Analysis Using Helmholtz Equation Least Squares Based Forced Vibro Acoustic Components, Logesh Kumar Natarajan

Wayne State University Dissertations

This dissertation presents a structure-borne noise analysis technology that is focused on providing a cost-effective noise reduction strategy. Structure-borne sound is generated or transmitted through structural vibration; however, only a small portion of the vibration can effectively produce sound and radiate it to the far-field. Therefore, cost-effective noise reduction is reliant on identifying and suppressing the critical vibration components that are directly responsible for an undesired sound. However, current technologies cannot successfully identify these critical vibration components from the point of view of direct contribution to sound radiation and hence cannot guarantee the best cost-effective noise reduction.

The technology developed …

Financial Development And Health Capital Accumulation, Gunakar Bhatta

Wayne State University Dissertations

This dissertation examines the interrelationship between financial development and health capital accumulation. While credit to GDP ratio, liquid liabilities to GDP ratio and market capitalization to GDP ratio are used as the proxies for financial development, health capital is represented by life expectancy, infant mortality and low birth weight. A simple static model in the utility maximization framework shows that financial development increases the medical care through income effect thus augmenting the health status. This is also supported by econometric analysis. Using various econometric models such as pooled OLS, fixed effect and instrumental variable approach, the study shows that higher …

A Phenomenological Study To Engage African-American Youth Voice In Deliberations Regarding Their Response To Schooling, Donna Michelle Coulter

Wayne State University Dissertations

To examine disparities in education, the researcher utilized a naturalistic approach to uncover how youth think, talk, and feel about their response to schooling. Findings are based on in-depth conversations with 12 inner city African-American kids enrolled in Urban, USA middle and high schools, rarely heard from in the scholarly literature. Students conveyed a belief system that schooling was the route to upward mobility, however, their responses to academic exercises seem to suggest an indifference. Primary findings suggest that students' (a) sense of safety and family tradition were key factors of student school selection; (b) understanding of how levels of …

Emerging Design Methodology And Its Implementation Through Rns And Qca, Omar Dajani

Wayne State University Dissertations

Digital logic technology has been changing dramatically from integrated circuits, to a Very Large Scale Integrated circuits (VLSI) and to a nanotechnology logic circuits. Research focused on increasing the speed and reducing the size of the circuit design. Residue Number System (RNS) architecture has ability to support high speed concurrent arithmetic applications. To reduce the size, Quantum-Dot Cellular Automata (QCA) has become one of the new nanotechnology research field and has received a lot of attention within the engineering community due to its small size and ultralow power.

In the last decade, residue number system has received increased attention due …

Bridging The Divide: Second Language Teachers, Pedagogy, Content Knowledge, And Technology, Margo Fryling

Wayne State University Dissertations

Abstract

This study examines the use of technology, pedagogy and content knowledge with second language teachers, and comparing Title 1 and non Title 1 schools. Technology can be used to provide unique learning opportunities for second language learners. Second language students can benefit from technology by practicing skills, increasing motivation, providing authentic materials, creating interaction between students, teachers and peers, creating individual learning, encouraging global understanding and increasing communication in safe ways (Lai & Kritsonsis, 2006). Although technology shows promise for increasing second language student achievement, students continue to have varied access at home, perpetuating the digital divide that was …

Comparative Power Of The Anova, Randomization Anova, And Kruskal-Wallis Test, Jamie Gleason

Wayne State University Dissertations

The t test has been suggested to be robust to departures from normality as long as group sizes are equal and samples approach 30 or more. The F statistic has also been proposed to have the same robust qualities as the t, though researchers have suggested that because a test is robust to departures from normality, that does not necessarily make it the best test for every situation. With the increase in computing capabilities, the permutation ANOVA has been explored as an alternative to the ANOVA under non-normal conditions to rehabilitate the loss of statistical power. Since the permutation ANOVA …

A Qualitative Study: Integrating Art And Science In The Environment, Deborah Naughton Mills

Wayne State University Dissertations

The study was used to develop an understanding of the nature of a creative learning experience that incorporated the foundational elements of Reggio Emilia, place-based education, and experience design. The study took place in an urban high school with eight students in an advanced placement art class. The qualitative research project revolved around the pollinator garden that the science teacher planted in the year prior to the study and the garden that was planted in the spring. Students were asked to create an art project that could withstand the Michigan climate. The science teacher lectured on elements of the pollinator …

The Effects Of Applying Authentic Learning Strategies To Develop Computational Thinking Skills In Computer Literacy Students, Wendye Dianne Mingo

Wayne State University Dissertations

This study attempts to determine if authentic learning strategies can be used to acquire knowledge of and increase motivation for computational thinking. Over 600 students enrolled in a computer literacy course participated in this study which involved completing a pretest, posttest and motivation survey. The students were divided into an experimental and control group based on class meeting day. The experimental group was given access to an authentic learning tool called COTHAULE. COTHAULE, which is an acronym that stands for Computational Thinking Authentic Learning Environment, is a website that was developed using a variety of technologies. The intellection behind COTHAULE …

Where Are All The Gifted Black Girls? Giving High School Girls Voice Via Qualitative Research Approach And Black Feminist Theory, Mary L. Montie

Wayne State University Dissertations

ABSTRACT

WHERE ARE ALL THE GIFTED BLACK GIRLS?

GIVING HIGH SCHOOL GIRLS VOICE VIA QUALITATIVE RESEARCH APPROACH AND BLACK FEMINIST THEORY

by

MARY L. MONTIE

May 2013

Advisor: Dr. Karen L. Tonso

Major: Educational Evaluation and Research

Degree: Doctor of Philosophy

Gifted programs in the United States under-represent African American (Black) children (Phi Delta Kappan, 1992). In 1993, African-American students were under-represented by 50% in gifted education, and 60% in 1998 (Grantham & Ford, 2003). Further, some speculate that gifted education programs are the most segregated educational programs in the nation (Ford, 1995). This proves especially true for Black gifted …

Visual Exploration And Information Analytics Of High-Dimensional Medical Images, Darshan Pai

Wayne State University Dissertations

Data visualization has transformed how we analyze increasingly large and complex data sets. Advanced visual tools logically represent data in a way that communicates the most important information inherent within it and culminate the analysis with an insightful conclusion. Automated analysis disciplines - such as data mining, machine learning, and statistics - have traditionally been the most dominant fields for data analysis. It has been complemented with a near-ubiquitous adoption of specialized hardware and software environments that handle the storage, retrieval, and pre- and postprocessing of digital data. The addition of interactive visualization tools allows an active human participant in …

Acidic Pericellular Ph: Effects On Proteolysis And Gene Expression As Determined In 3d Models Of Breast Carcinoma, Jennifer M. Rothberg

Wayne State University Dissertations

Among the non-cellular microenvironmental factors that contribute to malignancy of solid tumors is an acidic peritumoral pH. The first objective was to determine if an acidic extracellular pH observed in vivo (i.e., pHe 6.8) affects the activity of proteases, such as cathepsin B, that contribute to degradation of collagen IV by tumor cells when grown in biologically relevant three-dimensional cultures. At pHe 6.8 there were increases in pericellular active cysteine cathepsins and in degradation of DQ-collagen IV, which was partially blocked by a cathepsin B inhibitor. Imaging probes for active cysteine cathepsins localized to tumors in vivo. The amount of …

Combinatorial Auction-Based Virtual Machine Provisioning And Allocation In Clouds, Sharrukh Zaman

Wayne State University Dissertations

Current cloud providers use fixed-price based mechanisms to allocate Virtual Machine (VM) instances to their users. But economic theory states that when there are large amount of resources to be allocated to large number of users, auctions are the most efficient allocation mechanisms. Auctions achieve efficiency of allocation and also maximize the providers' revenue, which a fixed-price based mechanism is unable to do. We argue that combinatorial auctions are best suited for the problem of VM provisioning and allocation in clouds, since they provide the users with the most flexible way to express their requirements. In combinatorial auctions, users bid …

Faculty Attitudes Toward Students With Intellectual Disabilities In Postsecondary Educational Settings, Diane F. Fekete

Wayne State University Dissertations

Research has indicated that participation in some aspect of postsecondary education, either for credit or audit, could improve a disabled individual's changes for success in adult life. Research also has shown that faculty attitudes toward, and perceptions of students with disabilities play an important role in student success. The purpose of this study was to examine faculty attitudes toward the inclusion of students with intellectual disabilities in college classes and willingness by faculty to accommodate the course content to meet individual student needs. An internet survey instrument was developed to gather information concerning students with intellectual disabilities and faculty attitude …

Factors That Are Associated With Workkeys® Assessment Scores Of Inmates In Michigan Department Of Correction's Community And Employment Readiness Training Program And Michigan State Industries Program, Pamela S. Jackson

Wayne State University Dissertations

Inmates face challenges in obtaining employment once they leave prison because many are undereducated and lack work skills. This study examined demographic and criminogenic variables of inmates in Michigan Department of Correction's (MDOC) Community and Employment Readiness Training (CERT) and Michigan State Industries (MSI) programs that were associated with their scores obtained on the WorkKeys® assessment test. MDOC uses the WorkKeys® to assess the gaps between inmates' current job readiness skill level and skills needed for various types of jobs upon release. There is no published literature comparing MDOC's Community and Employment Readiness Training (CERT) and Michigan State Industries (MSI) …

Fault Management For Service-Oriented Systems, Amal Alhosban

Wayne State University Dissertations

Service Oriented Architectures (SOAs) enable the automatic creation of business applications from independently developed and deployed Web services. As Web services are inherently unreliable,

how to deliver reliable Web services composition over unreliable Web services is a significant and challenging problem. The process requires monitoring the system's behavior, determining when and why faults occur, and then applying fault prevention/recovery mechanisms to minimize the impact and/or recover from these faults. However, it is hard to apply a non-distributed management

approach to SOA, since a manager needs to communicate with the different components through authentications. In SOA, a business process can terminate …

Modeling Of Mouse Eye And Errors In Ocular Parameters Affecting Refractive State, Gurinder Bawa

Wayne State University Dissertations

ABSTRACT

MODELING OF MOUSE EYE AND ERRORS IN OCULAR PARAMETERS AFFECTING REFRACTIVE STATE

by

GURINDER BAWA

September 2013

Advisor: Dr. Ivan Avrutsky

Major: Electrical Engineering

Degree: Doctor of Philosophy

Rodents eye are particularly used to study refractive error state of an eye and development of refractive eye. Genetic organization of rodents is similar to that of humans, which makes them interesting candidates to be researched upon. From rodents family mice models are encouraged over rats because of availability of genetically engineered models. Despite of extensive work that has been performed on mice and rat models, still no one is able …

Experimental Investigation And Development Of An Extended Two Color Method (Etcm) With Application To Internal Combustion Engines, Elena Florea

Wayne State University Dissertations

The internal combustion engine is on a continuous path of improvement to reduce exhaust gaseous emissions and improve fuel economy. While recent trends in diesel engine development have lowered the EGR requirements, future regulatory pressure will likely result in a reversed trend in the future.

Given this, it is of interest to improve the application range of diagnostic tools such as the two color method (TCM) typically used in evaluating the properties of engine soot, such as temperature and volume fraction. This optical diagnostic method relies on the use of the light emitted by the soot particles along with a …

Supporting Text Retrieval Query Formulation In Software Engineering, Sonia Cristina Haiduc

Wayne State University Dissertations

The text found in software artifacts captures important information. Text Retrieval (TR) techniques have been successfully used to leverage this information. Despite their advantages, the success of TR techniques strongly depends on the textual queries given as input. When poorly chosen queries are used, developers can waste time investigating irrelevant results.

The quality of a query indicates the relevance of the results returned by TR in response to the query and can give an indication if the results are worth investigating or a reformulation of the query should be sought instead. Knowing the quality of the query could lead to …

Mitochondrial Dna Instability In Cells Lacking Aconitase Correlates With Iron Citrate Toxicity, Muhammad A. Farooq, Tammy M. Pracheil, Zhejun Dong, Fei Xiao, Zhengchang Liu

Biological Sciences Faculty Publications

Aconitase, the second enzyme of the tricarboxylic acid cycle encoded by ACO1 in the budding yeast Saccharomyces cerevisiae, catalyzes the conversion of citrate to isocitrate. aco1 Delta results in mitochondrial DNA (mtDNA) instability. It has been proposed that Aco1 binds to mtDNA and mediates its maintenance. Here we propose an alternative mechanism to account for mtDNA loss in aco1 Delta mutant cells. We found that aco1 Delta activated the RTG pathway, resulting in increased expression of genes encoding citrate synthase. By deleting RTG1, RTG3, or genes encoding citrate synthase, mtDNA instability was prevented in aco1 Delta mutant …

Mitochondrial Dna Instability In Cells Lacking Aconitase Correlates With Iron Citrate Toxicity, Zhengchang Liu, Fei Xiao, Zhejun Dong, Tammy Pracheil, Muhammad Farooq

Biological Sciences Faculty Publications

Aconitase, the second enzyme of the tricarboxylic acid cycle encoded by ACO1 in the budding yeast Saccharomyces cerevisiae, catalyzes the conversion of citrate to isocitrate. aco1Δ results in mitochondrial DNA (mtDNA) instability. It has been proposed that Aco1 binds to mtDNA and mediates its maintenance. Here we propose an alternative mechanism to account for mtDNA loss in aco1Δ mutant cells. We found that aco1Δ activated the RTG pathway, resulting in increased expression of genes encoding citrate synthase. By deleting RTG1, RTG3, or genes encoding citrate synthase, mtDNA instability was prevented in aco1Δ mutant cells. Increased activity of citrate synthase leads …

Sci-Tech Book News Reviews, Susan Fingerman

Sci-Tech News

No abstract provided.

Full Issue, Vol. 67, Issue 1

Sci-Tech News

No abstract provided.

Assessing Continuous Contamination Discharge From A Combined Sewer Outfall (Cso) Into A Tidal Wetland Creek: Bacteriological And Heavy Metals Indicators, Timothy Eaton, Gregory D. O'Mullan, Ashaki A. Rouff

Publications and Research

Continuous discharge from a combined sewer overflow (CSO) into a tidal wetland creek in the New York City urban area was analyzed to assess the extent of water quality degradation from fecal bacteria contamination during both dry and wet weather. A combination of fecal indicator bacteria (FIB), total suspended solids, and dissolved metals were used to infer the presence of sewage pollution from the CSO discharge and to constrain the spatial and temporal impact on water quality and dry season creek flows. Upstream of the CSO, creek flow was dominated by groundwater input, and FIB levels were very low or …

Impacts Of Elevated Co2 Concentration On The Productivity And Surface Energy Budget Of The Soybean And Maize Agroecosystem In The Midwest Usa, Tracy E. Twine, Jarod J. Bryant, Katherine T. Richter, Carl J. Bernacchi, Kelly D. Mcconnaughay, Sherri J. Morris, Andrew D. B. Leakey

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The physiological response of vegetation to increasing atmospheric carbon dioxide concentration ([CO₂]) modifies productivity and surface energy and water fluxes. Quantifying this response is required for assessments of future climate change. Many global climate models account for this response; however, significant uncertainty remains in model simulations of this vegetation response and its impacts. Data from in situ field experiments provide evidence that previous modeling studies may have overestimated the increase in productivity at elevated [CO₂], and the impact on large-scale water cycling is largely unknown. We parameterized the Agro-IBIS dynamic global vegetation model with observations from …

Characteristics Of And Strategies Used By Principals Who Promote Academic Success In Title I Classified Schools, Kimberly Kay Cohen

Dissertations

This research is an attempt to explore the various strategies employed by the principals of Title I schools in order to foster an environment of student progress and achievement. Since the inception of the NCLB Act, pressures have been increasing on the schools, especially on Title I Schools, and on their principals to increase academic performance. The researcher selected four Title I Schools and used questionnaires for teachers and interviews for principals to explore the answer to the research questions. The research philosophy acknowledges both the mainstream approaches of positivism and interpretivism and follows a mixed methods approach. The sample …

Early Transition Metal Ccc-Nhc Pincer Complexes: Synthesis, Characterization, And Catalysis, Theodore Rudy Helgert

Electronic Theses and Dissertations

The previously reported amine elimination methodology for the metalation of CCC-NHC pincer ligand precursors has been extended to other early-transition metals and ligands. Specifically, synthetic results for the preparation of imidazole based CCC-NHC pincer Ti (IV), CCC-NHC pincer Ta (V) will be discussed. In addition, the synthesis of a new triazole based CCC-NHC pincer ligand precursor and its metalation with Ta (V) will be presented. Coordination sphere manipulation of the new pincer complexes using TMSCl for the Ti complex and lithium t-butylamide for the Ta complexes is also discussed. The reaction of the initial Ta CCC-NHC complex with lithium t-butylamide …

Geomorphic-Vegetation Relationships Using A Geopedological Classification System, Northern Chihuahuan Desert, Usa, G.A. Michaud, H.C. Monger, D.L. Anderson

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Drylands typically have distinctive vegetative patterns that reflect the underlying physical landscape. We use a geopedological classification to organize the landscape into five categories from broad scale to fine scale: (1) physiographic divisions which describe regional topography, such as mountains and basin floors; (2) regolith type which identifies residuum versus transported sediments; (3) parent materials which describe mineralogy; (4) landforms which provide meso-scale descriptions of topography; and (5) soil texture, a fine-scale variable important for infiltration, erodibility, and available water holding capacity. The study was conducted in a 1753 km² area of the White Sands Missile Range and …

Qualitative And Quantitative Analysis Of Lignocellulosic Biomass Using Infrared Techniques: A Mini-Review, Feng Xu, Jianming Yu, Tesfaye Tesso, Floyd Dowell, Donghai Wang

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Current wet chemical methods for biomass composition analysis using two-step sulfuric acid hydrolysis are time-consuming, labor-intensive, and unable to provide structural information about biomass. Infrared techniques provide fast, low-cost analysis, are non-destructive, and have shown promising results. Chemometric analysis has allowed researchers to perform qualitative and quantitative study of biomass with both near-infrared and mid-infrared spectroscopy. This review summarizes the progress and applications of infrared techniques in biomass study, and compares the infrared and the wet chemical methods for composition analysis. In addition to reviewing recent studies of biomass structure and composition, we also discuss the progress and prospects for …

Altered Physiology, Cell Structure, And Gene Expression Of Theobroma Cacao Seedlings Subjected To Cu Toxicity, Vânia L. Souza, Alex-Alan F. De Almeida, Jadiel De S. Souza, Pedro A. O. Mangabeira, Raildo M. De Jesus, Carlos P. Pirovani, Dário Ahnert, Virupax C. Baligar, Leandro L. Loguercio

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Seedlings of Theobroma cacao CCN 51 genotype were grown under greenhouse conditions and exposed to increasing concentrations of Cu (0.005, 1, 2, 4, 8, 16, and 32 mg Cu L⁻¹) in nutrient solution. When doses were equal or higher than 8mg Cu L⁻¹, after 24 h of treatment application, leaf gas exchange was highly affected and changes in chloroplasts thylakoids of leaf mesophyll cells and plasmolysis of cells from the root cortical region were observed. In addition, cell membranes of roots and leaves were damaged. In leaves, 96 h after treatments started, increases in the percentage …

Mode-Division Multiplexed Transmission In Few-Mode Fibers, Neng Bai

Electronic Theses and Dissertations

As a promising candidate to break the single-mode fiber capacity limit, mode-division multiplexing (MDM) explores the spatial dimension to increase transmission capacity in fiberoptic communication. Two linear impairments, namely loss and multimode interference, present fundamental challenges to implementing MDM. In this dissertation, techniques to resolve these two issues are presented. To de-multiplex signals subject to multimode interference in MDM, Multiple-InputMultiple-Output (MIMO) processing using adaptive frequency-domain equalization (FDE) is proposed and investigated. Both simulations and experiments validate that FDE can reduce the algorithmic complexity significantly in comparison with the conventional time-domain equalization (TDE) while achieving similar performance as TDE. To further …