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Electronic Theses and Dissertations

2004

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Solution Treatment Of Vacuum High Pressure Die Cast Aluminum Alloy A380., Yufu Wang Jan 2004

Solution Treatment Of Vacuum High Pressure Die Cast Aluminum Alloy A380., Yufu Wang

Electronic Theses and Dissertations

High pressure die castings usually contain gas porosity mainly due to the entrapment of air or gas during melting due to very high speed injection of the molten metal into the cavity. Vacuum high pressure die casting technology has been proven to be an effective way of reducing gas porosity and pore sizes in castings. As a result, density and mechanical properties, particularly tensile strength and ductility, were improved markedly, and also make castings heat treatable. An investigation on the effect of solution heat treatment in high pressure vacuum die casting A380 alloy has been carried out using methods of …

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Strengthening Reinforced Concrete Column-Slab Connection Using Cfrp Sheets., Hazem Abou El-Enein Jan 2004

Strengthening Reinforced Concrete Column-Slab Connection Using Cfrp Sheets., Hazem Abou El-Enein

Electronic Theses and Dissertations

Due to the high cost of new construction and the increasing inventory of otherwise adequate structure, the need for repair, strengthening, or reinforced-concrete structures is growing significantly in Canada and worldwide. Fiber reinforced polymer technology has emerged during the past decade as a particular tool to upgrade existing structures. These materials are an excellent option for use as external reinforcing because of their light weight, resistance to corrosion, and high strength. This thesis introduces a strengthening technique of slab-column connection in flat-slab structures to enhance its flexural strength. Six flat-slab column connections were fabricated and then tested under increasing gravity …

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Study Of Crossflow Cooling And Heating Of Air Via An In-Line Elliptical Tube Array Heat Exchanger., Mesbah-Ul Ghani Khan Jan 2004

Study Of Crossflow Cooling And Heating Of Air Via An In-Line Elliptical Tube Array Heat Exchanger., Mesbah-Ul Ghani Khan

Electronic Theses and Dissertations

In current study, airside heat transfer and flow characteristics of an elliptical tube array heat exchanger were experimentally investigated by examining the effects of Reynolds number on Nusselt number and pressure drop coefficient. In a thermal wind tunnel, the air-cooling and air-heating experiments were conducted via an array of 18 elliptical tubes (each 300 mm long) with their 31.7 mm major axis parallel to the air crossflow. The tubes, minor-to-major axis ratio of 0.3, were evenly spaced by 6.1 mm airgap. The array was placed in a 300 x 300 mm2 and 600 mm long test section. Water entered the …

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Supervisory Control Of Machine Tool Feed Drives., Rami Shahin Jan 2004

Supervisory Control Of Machine Tool Feed Drives., Rami Shahin

Electronic Theses and Dissertations

While motion control of machine tool feed drives is the targeted application. The goal of this study is to explore the relative performance potentials of supervisory control systems against the classical servo control systems; Reconfiguration aspects at the control level are the scope of this study. One of the most essential nonlinear problems faced during modeling and control stages of the CNC machining systems is called backlash. Reversal of motion for each moving axis can lead to that area of disengagement where backlash occurs due to inherently unavoidable clearance between linkages of the machine tool feed drive system. Due to …

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Supramolecular Complexes Containing Pyridine N-Oxides., Dennis J. Hoffart Jan 2004

Supramolecular Complexes Containing Pyridine N-Oxides., Dennis J. Hoffart

Electronic Theses and Dissertations

In the first section, the coordination chemistry of a new, divergent, N,O ligand was investigated. Several metal complexes of 4,4 '-bipyridine N-monoxide, 2a, were characterised by X-ray crystallography, including CuI, Cu II, PdII, CdII, HgII, and EuIII. The observed non-covalent interactions and coordinative preferences of 2a were contrasted with those of 4,4' -bipyridine and 4,4'-bipyridine N,N '-dioxide. Each of the compounds has a unique molecular topology that can be applied to the generation of ordered, pre-designed solids. Examples of this methodology are given with respect to the CuI, Cu II, and HgII metal complexes. Chapter three is concerned with the …

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Efficient Algorithms For The Optical Multi-Trees (Omult) Architecture., Mohammad Rabiul Islam Jan 2004

Efficient Algorithms For The Optical Multi-Trees (Omult) Architecture., Mohammad Rabiul Islam

Electronic Theses and Dissertations

In this thesis, we have reported our investigations on efficiently implementing algorithms on the recently proposed Optical Multi-Trees (OMULT) multi-processors interconnection architecture that uses both electronic and optical links among processors. We have investigated algorithms for matrix multiplication of two matrices of size n2 x n2 and two matrices of arbitrary size, the prefix-sum of a series and some fundamental computational geometry problems. We show that some common algorithms for computational geometry---finding the convex hull, the smallest enclosing box, the empirical cumulative distribution function and the all-nearest neighbor problems of n data points can be computed on the OMULT network …

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The Measure Of A Woman (Original Writing)., Tracey Grozier Jan 2004

The Measure Of A Woman (Original Writing)., Tracey Grozier

Electronic Theses and Dissertations

This creative project deals with the issue of measurement in its multiple representations. Though my work is autobiographical, it is my hope that readers will be able to experience a personal recognition in the recounting of my memories. I have set an extra place for you at my Sunday dinner table. Pull up your chair and enjoy. Source: Masters Abstracts International, Volume: 43-01, page: 0059. Adviser: Susan Holbrook. Thesis (M.A.)--University of Windsor (Canada), 2004.

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White Shoes, White Socks: The Coach-Athlete Relationship In Constructing Masculinities, Mohammed Ali Wilson Jan 2004

White Shoes, White Socks: The Coach-Athlete Relationship In Constructing Masculinities, Mohammed Ali Wilson

Electronic Theses and Dissertations

Masculinity as an element of men's identity is socially constructed and hegemonically legitimized. The literature postulates that sport is an institution, which helps reinforce and privilege a white heterosexual hegemonic form of masculinity. The primary purpose of this research was to examine the role of the male basketball coach in the construction of his athlete's masculine identity. A theoretical framework based on social construction and hegemony was used to examine the influences of power, sexuality, and race in the formation of men's masculine identity within basketball. This qualitative study which offers a unique Canadian perspective on men's university basketball highlights …

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Compressive Strength Of Solid Round Steel Leg And Bracing Members Of Lattice Communication Towers Reinforced With Rods Or Angles., Cindy Kumalasari Jan 2004

Compressive Strength Of Solid Round Steel Leg And Bracing Members Of Lattice Communication Towers Reinforced With Rods Or Angles., Cindy Kumalasari

Electronic Theses and Dissertations

No abstract provided.

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Transient Local Scour By Submerged Three-Dimensional Wall Jets: Effect Of Tailwater Depth, Md. Abdullah Al Faruque Jan 2004

Transient Local Scour By Submerged Three-Dimensional Wall Jets: Effect Of Tailwater Depth, Md. Abdullah Al Faruque

Electronic Theses and Dissertations

The present study deals with scour caused by three-dimensional wall jets issuing from a square cross-section nozzle onto a non-cohesive sand bed. Experiments were conducted using two different nozzles and three tailwater depths. Velocity measurements were conducted using a one component laser Doppler anemometer. The densimetric Froude number was maintained below ten, while the jet expansion ratio was held greater than ten. The results indicate that the densimetric Froude number, tailwater depth and grain size to nozzle size ratio, all have an influence on the extent of scour caused by three-dimensional jets. However, each parameter has a dominant influence under …

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Synthesis And Systematic Studies Of The Electronic And Magnetic Properties Of Alkali Fulleride Intercalates In Mesoporous Tantalum Oxide., Boris O. Skadtchenko Jan 2004

Synthesis And Systematic Studies Of The Electronic And Magnetic Properties Of Alkali Fulleride Intercalates In Mesoporous Tantalum Oxide., Boris O. Skadtchenko

Electronic Theses and Dissertations

Herein we report the synthesis and systematic study of a new family of alkali fulleride A3C60 (A = Na, Li, Rb) doped mesoporous tantalum oxide nanocomposites. This study allowed us to chart the dependency of conductivity and electromagnetic properties on the oxidation state of one-dimensional fullerides and elucidate the role of absolute carbon loading level in the pores of mesostructure. The role of alkali metal in the conducting properties of these composite materials and possible mechanisms of electron transfer upon reduction of fulleride is also discussed. Results presented in this work indicated that in case of Na and Rb fullerides …

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Teachers' Interfaculty Mentorship Efforts: T.I.M.E. A Study Evaluating The Effects Of A Formal Mentoring Program On First-Year At-Risk Students, G. Salinitri Jan 2004

Teachers' Interfaculty Mentorship Efforts: T.I.M.E. A Study Evaluating The Effects Of A Formal Mentoring Program On First-Year At-Risk Students, G. Salinitri

Electronic Theses and Dissertations

The purpose of this study was to evaluate a unique formal mentoring program at a midsized comprehensive university in Ontario. The retention rates, grade point averages (GPA) and number of courses completed by the students who participated (experimental group) were higher than the retention rates, grade point averages, and number of courses completed by the control group consisting of an equal number of first-time, full-time, credit-seeking students with programs of study and similar exiting secondary school averages (i.e., <75%). Results from surveys conducted to measure self-concept and satisfaction were not found to be significantly related to mentoring. However, the results of mentor effectiveness and evaluation suggested program satisfaction and effectiveness. Interviews were also conducted and analyzed using qualitative research methods to enrich the empirical findings. Using an explanatory approach the qualitative analysis linked the program to the theoretical foundations of the study. Findings from this study illustrate the importance of institutions investing in human capital (e.g., at risk students) through a mutually beneficial mentoring program like T.I.M.E., a practicum course designed for preservice teachers to prepare them as mentors for their students. There was clear empirical evidence that this formal mentoring program is effective with respect to achievement (GPA), failure rates and retention. Also, the qualitative data provided an enriched understanding of the effectiveness of the program to both mentee and mentor. Finally, these data clearly showed that the program could be linked to various configurations of Social Capital Theory as the executive control mechanism tying together the Theory of Involvement, the Theory of Departure and the Theory of Social Learning, with the Theory of Involvement taking the lead as the most compelling link to the success of mentoring. Source: Dissertation Abstracts International, Volume: 65-07, Section: A, page: 2522. Adviser: Larry Morton. Thesis (Ph.D.)--University of Windsor (Canada), 2004.

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Tests Of Homogeneity Of Several Location And Scale Populations, And Analysis Of Paired Count Data With Zero-Inflation And Over-Dispersion., Xing Jiang Jan 2004

Tests Of Homogeneity Of Several Location And Scale Populations, And Analysis Of Paired Count Data With Zero-Inflation And Over-Dispersion., Xing Jiang

Electronic Theses and Dissertations

This thesis consists of two parts, referred as Part I and Part II. Part I. Testing homogeneity of several location-scale populations. The widely used method for testing homogeneity of several normal populations is to test the equality of means based on the assumption that the variances among different groups are same. But in practice, we often get data which are different not only in means but also in variances. Singh (1986) tests the homogeneity of several normal populations simultaneously regarding commonality of means and variances based on a method by Fisher (1950). However, this problem arises not only in normal …

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New Molecular And Polymeric Frameworks Via Metal -Ligand Self -Assembly And Hydrogen-Bonding., Derek A. Beauchamp Jan 2004

New Molecular And Polymeric Frameworks Via Metal -Ligand Self -Assembly And Hydrogen-Bonding., Derek A. Beauchamp

Electronic Theses and Dissertations

No abstract provided.

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Improvement In Functional Characteristics Of Aluminum-Silicon Cast Components Through The Utilization Of A Novel Electromagnetic Treatment Of Liquid Melts., Francisco Carlos Robles Hernandez Jan 2004

Improvement In Functional Characteristics Of Aluminum-Silicon Cast Components Through The Utilization Of A Novel Electromagnetic Treatment Of Liquid Melts., Francisco Carlos Robles Hernandez

Electronic Theses and Dissertations

No abstract provided.

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"Warriors Of The Working-Day" Class In Shakespeare's Second Historical Trilogy, Richard Brooke Morrill Jan 2004

"Warriors Of The Working-Day" Class In Shakespeare's Second Historical Trilogy, Richard Brooke Morrill

Electronic Theses and Dissertations

In Shakespeare's historical plays, we find the traditional and politically "top-heavy" historic events of monarchs, aristocrats and patriarchs, of national and international politics and of wars, civil and foreign. This is the type of practice that E.P. Thompson was challenging when he coined the polemic phrase "history from below." It is necessary, Thompson says, to rethink historiography as a means of creating national identity because of its inherent lack of sociopolitical objectivity, particularly with respect to class. "It is one of the peculiarities of the English," he writes, "that the history of the 'common people' has always been something other …

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Behavior Of Pile-Supported Integral Abutments At Bridge Sites With Shallow Bedrock, John Gordon Delano Jan 2004

Behavior Of Pile-Supported Integral Abutments At Bridge Sites With Shallow Bedrock, John Gordon Delano

Electronic Theses and Dissertations

The advantages of constructing bridges with integral abutments are recognized by transportation agencies worldwide. However, pile supported integral abutments are limited to locations where the depth of overburden can provide fixed support conditions. In Maine, there are often cases where the depth to bedrock prohibits integral abutment bridges from being used. The goal of this research is to determine the feasibility of constructing integral abutments in conditions that cannot provide the fixed support conditions that are traditionally assumed. A finite element model was created that incorporates realistic constitutive and surface interaction models. These models allow for a good prediction of …

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Estimation Of Standardized Mortality Ratio In Geographic Epidemiology, Anna Kettermann Jan 2004

Estimation Of Standardized Mortality Ratio In Geographic Epidemiology, Anna Kettermann

Electronic Theses and Dissertations

The analysis of geographic variation of disease and its representation on a map form an important topic of research in epidemiology and in public health in general. Identification of spatial heterogeneity of relative risk using morbidity and mortality data is required. The usual technique of disease atlas generation consists of data collection (observed number of disease cases). These data are collected during a continuous period of time (5 to 10 years). The second aspect of atlas creation relates to the analysis of these data. A traditional measure of the spatial variation is usually taken as a ratio of the number …

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Self Designing Pattern Recognition System Employing Multistage Classification, Manal M. Abdelwahab Jan 2004

Self Designing Pattern Recognition System Employing Multistage Classification, Manal M. Abdelwahab

Electronic Theses and Dissertations

Recently, pattern recognition/classification has received a considerable attention in diverse engineering fields such as biomedical imaging, speaker identification, fingerprint recognition, etc. In most of these applications, it is desirable to maintain the classification accuracy in the presence of corrupted and/or incomplete data. The quality of a given classification technique is measured by the computational complexity, execution time of algorithms, and the number of patterns that can be classified correctly despite any distortion. Some classification techniques that are introduced in the literature are described in Chapter one. In this dissertation, a pattern recognition approach that can be designed to have evolutionary …

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The Effect Of Peer Advisors On Esl Students' Perspectives Of University Academic Tasks, Monica Fishkin Jan 2004

The Effect Of Peer Advisors On Esl Students' Perspectives Of University Academic Tasks, Monica Fishkin

Electronic Theses and Dissertations

A review of the related literature revealed that international students face specific academic challenges. The goal of this research was to investigate the effect of international student peer advising sessions on English as a Second Language (ESL) international students' perceptions of their language skills and strategies for dealing with academic tasks. The research design included a control and an experimental group with a pretest and a posttest administration of the Strategy Inventory for Language Learning (SILL) and the Xu International Student Academic Language Needs Assessment (ISALNA-2) instruments. Qualitative data was also collected. The participants in the study were upper-intermediate level …

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Sinbad Automation Of Scientific Process: From Hidden Factor Analysis To Theory Synthesis, Olcay Kursun Jan 2004

Sinbad Automation Of Scientific Process: From Hidden Factor Analysis To Theory Synthesis, Olcay Kursun

Electronic Theses and Dissertations

Modern science is turning to progressively more complex and data-rich subjects, which challenges the existing methods of data analysis and interpretation. Consequently, there is a pressing need for development of ever more powerful methods of extracting order from complex data and for automation of all steps of the scientific process. Virtual Scientist is a set of computational procedures that automate the method of inductive inference to derive a theory from observational data dominated by nonlinear regularities. The procedures utilize SINBAD – a novel computational method of nonlinear factor analysis that is based on the principle of maximization of mutual information …

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Damage Modeling Method For Turbine Compressor Blade Tuning, Gennadiy Afanasiev Jan 2004

Damage Modeling Method For Turbine Compressor Blade Tuning, Gennadiy Afanasiev

Electronic Theses and Dissertations

The thesis presents a method of evaluation for blade damage in Combustion Turbine Compressor Section. This method involves use of multiple domains within a single Finite Element Model to predict the effect of damage on the blade properties. This approach offers significant time and effort savings when compared to traditional evaluation methods of similar problems. It is demonstrated via examples that the multi-domain modeling approach yields acceptable accuracy results. The economical implications of described method are readily applicable to both the industrial and the aerospace Combustion Turbine fields. It is economically impractical to replace the blade at each damage occurrence. …

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A Framework Roadmap For Implementing Lean Six Sigma In Local Governmental Entities, Sandra L. Furterer Jan 2004

A Framework Roadmap For Implementing Lean Six Sigma In Local Governmental Entities, Sandra L. Furterer

Electronic Theses and Dissertations

Lean Six Sigma is an approach focused on improving quality, reducing variation and eliminating waste in an organization. The concept of combining the principles and tools of Lean Enterprise and Six Sigma has occurred in the literature over the last several years. The majority of Lean Six Sigma applications have been in private industry, focusing mostly on manufacturing applications. The literature has not provided a framework for implementing Lean Six Sigma programs applied to local government. This research provides a framework roadmap for implementing Lean Six Sigma in local government. The Service Improvement for Transaction-based Entities Lean Six Sigma Framework …

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Location Of Sinkhole Confining Breach Using Groundwater Flow Patterns Derived From Cone Penetration Testing, Natalie Romina Marinuzzi Jan 2004

Location Of Sinkhole Confining Breach Using Groundwater Flow Patterns Derived From Cone Penetration Testing, Natalie Romina Marinuzzi

Electronic Theses and Dissertations

Dynamic forces in the hydrologic cycle move underground water through Florida's carbonate rocks dissolving chemical components of the rocks, leaving behind caves, solution pipes, and other voids that result in a karst terrain. Ravelling is the common subsidence mechanism throughout most of Florida where unconsolidated materials filter downward into voids in the underlying limestone. A cavity in the overburden develops and enlarges over a period of many years. The enlarged cavity is also known as sinkhole. The investigations of sinkhole characteristics and potential involve studying the regional geology, hydrology and mapping historic sinkholes that have occurred in the area. Use …

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Pedagogy For Internet-Based Teaching And Learning And The Impact Of That Pedagogy On Student Achievement And Satisfaction, Janet Perkins Kemerait Jan 2004

Pedagogy For Internet-Based Teaching And Learning And The Impact Of That Pedagogy On Student Achievement And Satisfaction, Janet Perkins Kemerait

Electronic Theses and Dissertations

The purpose of this research was to identify appropriate pedagogical practices for Internet-based teaching and learning, determine the status of their use in the community college adjunct instructor's Internet-based classroom, and examine the impact of these practices on student academic achievement and satisfaction. Frequencies, measures of central tendency, percentages, and SPSS Cross Tabulation procedures described and analyzed data from student and instructor surveys to answer these questions. Internet-based best practice and recommended practice pedagogical methods and strategies were identified through extensive content analysis of the professional literature. Internet-based adjunct instructors at a Central Florida community college rated 43 selected recommended …

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Instructional Practices In Athletic Training Education Programs: 'What, Nancy Cummings Jan 2004

Instructional Practices In Athletic Training Education Programs: 'What, Nancy Cummings

Electronic Theses and Dissertations

This study sought to understand effective and ineffective instructional practices in clinical settings and to identify problem-solving strategies used by students and instructors. Three research questions were addressed: where in the undergraduate athletic training education program do students learn, or fail to learn, particular skills; "what instructional methods are of most worth" in teaching these skills, as perceived by the students; and what are the problem-solving strategies used by novice, experienced non-expert, and expert athletic trainers when confronted with novel situations. The subjects were nine students ("novices") and ten Approved Clinical Instructors (ACI's) from three programs in the Southeast United …

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Beginning Teacher Satisfaction With Employment In Southwest Florida: R, Derrick Donnell Jan 2004

Beginning Teacher Satisfaction With Employment In Southwest Florida: R, Derrick Donnell

Electronic Theses and Dissertations

The United States Department of Education predicts that the nation will need more than one million new teachers by the year 2010 (U.S.DOE, 1996). At the same time, 43% of teachers leave the profession within their first five years of employment. Southwest Florida is experiencing a tremendous growth rate. This growth rate pattern has been predicted to continue through the year 2010. The school districts of Southwest Florida find themselves scrambling to build new schools in order to keep pace with the growth. These new schools must be staffed with qualified teachers. The No Child Left Behind Act of 2001 …

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The Challenge Of Playing Multiple Arthurian Characters, Cynthia Lowa Jan 2004

The Challenge Of Playing Multiple Arthurian Characters, Cynthia Lowa

Electronic Theses and Dissertations

This thesis examines the portrayal of multiple roles in a production of Camelot, written by Alan Jay Lerner and Frederick Loewe. Performance and content analysis identifies and explores the difficulties and challenges in portraying multiple roles in this production, including the understudying of the leading role of Guenevere. A detailed historical analysis provides background into origin of the Arthurian legend and an examination of its historical development. A social analysis provides information on the role of women in medieval society with a discussion of the customs and laws that applied to them. Furthermore, a structural analysis of the script examines …

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Dewatering Of Biosolids By Sodium Ferrate, Andrea Rios Jan 2004

Dewatering Of Biosolids By Sodium Ferrate, Andrea Rios

Electronic Theses and Dissertations

This study was conducted to evaluate the effectiveness of the liquid form of ferrate for dewatering of biosolids from wastewater treatment facilities. Two different ferrate products prepared using calcium hypochlorite and sodium hypochlorite were used. Samples of anaerobic digested sludge and waste activated sludge with solids content of 2.1% and 0.95 %, respectively were conditioned with both products to evaluate and compare their effectiveness. Centrifugation and filtration of the sludge after conditioning were used. For centrifugation the volume reduction and the turbidity of the supernatant after centrifugation were evaluated. For filtration, the Capillary Suction Time test was used. The optimum …

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The Effects Of Four Different Strategies Of Information Presentation I, Ming-Hsu Tsai Jan 2004

The Effects Of Four Different Strategies Of Information Presentation I, Ming-Hsu Tsai

Electronic Theses and Dissertations

The purpose of this study was to investigate whether learners' computer self-efficacy and prior computer knowledge influence their performance and satisfaction when presented with various instructional strategies of information presentation in computer-based software training. Seventy-eight undergraduate students were randomly assigned into four groups (a) deductive-inquisitory, which present general information first and then require learner to generates examples, (b) deductive-expository, which present general information first then present examples, (c) inductive-inquisitory, which present examples first and then require learners to discover relationship, (d) inductive-expository, which present examples first then present general information. The instructional materials were computer-based Netscape Composer 7.1 tutorials. For …

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