Digital Commons Network^™

The Learning Disabled College Student : Experiencing The Hundred-Acre Wood, Frances Lowry Schander

Dissertations

Problem. Learning disabled (LD) college students are attempting college in unprecedented numbers. This study explores the experiences of four graduating college students to determine how they managed their disability in the educational environment that has provided them with much difficulty for many years.

Method. A qualitative case study design with purposive sampling was used for this study. Over 9 months, four female college students, identified as learning disabled, were interviewed. In addition, conversations were held with their parents and teachers whom the four students identified as being “helpful.” Each student’s experience in college is described and analyzed. Important themes, along …

The Effect Of Professional Growth Opportunities As Determined By California Public High School Instrumental Music Teachers, Charles Friedrichs Edd

Dissertations

Improving the quality of teaching and instruction is a continuing challenge for schools and teachers. To meet this challenge the State of California requires all teachers to participate in professional growth activities by showing evidence of 150 hours of professional growth every five years (Ed. Code §44277-2b). The purposes of this study were to examine the professional growth habits and needs of high school instrumental music teachers in the state of California, and the effectiveness of current professional growth opportunities as perceived by those teachers. In addition, this study examined the implications of professional growth opportunities for these music teachers …

The Effects Of Teachers' Flow Experiences On The Cognitive Engagement Of Students, Nian Q. Zhu Edd

Dissertations

The purpose of this quantitative study was to investigate the relationship between teachers' flow experiences and student cognitive engagement during class time. Study participants consisted of students and their teachers in grades 6 through 10 from a number of elementary and secondary schools in the Fraser Valley region of British Columbia, Canada. Data were collected through the use of the Experience-Sampling Method, originally developed by Csikszentmihalyi to investigate flow experiences, that allowed teachers and students to fill out sampling forms in response to randomly generated electronic signals transmitted to pagers or wrist watches that the teachers wore. Data were collected …

The Effectiveness Of The High-School Academic Program In Preparing Graduates For Post-Secondary Education As Perceived By Alumni From Four Seventh-Day Adventist Senior High Schools In Canada, Janice P. Maitland

Dissertations

Problem. Questions have been raised regarding the preparation of high-school students for postsecondary studies. This study was designed to measure the effectiveness of the high-school academic program in preparing graduates for postsecondary education as perceived by alumni from four Seventh-day Adventist senior high schools in Canada.

Method. Respondents were asked to indicate their level of agreement for each of 18 statements on a Likert-type (survey) instrument, strongly disagree (1) to strongly agree (5), measured against a scale—I-2.5, minimally effective; 2.51-3.5, moderately effective; and 3.51-5, highly effective. Mean scores and standard deviation scores were calculated to answer the first research question. …

Cognitive And Non-Cognitive Characteristics As Predictors Of College Success Among African-American And Caucasian Students In A Comprehensive Community College, Denise Marie Scameheorn

Dissertations

Problem. This study examined the relationship of selected cognitive and non-cognitive characteristics of community college students, particularly Aftican-American and Caucasian students, with self-concept, class attendance patterns, and GPA.

Method. The subjects were 185 community college students. They completed the Non- Cognitive Questionnaire and the Learning and Study Strategies Inventory. Demographic data were obtained from the college student database. Instructors provided attendance and grade records.

Results.

1. Student self-concept was related to age, academic background and skills, and selected learning and study strategies.

2. Student class attendance was related to family support, ethnicity, academic background and skills, and motivation.

3. Student …

The Effects Of Radiation Damage On The Vortex Dynamics Of High Temperature Superconductors, Andra Petrean

Dissertations

This work focuses on the interaction between magnetic vortices in high temperature superconductors and defects introduced by irradiation with protons and heavy ions. The study concentrates on the high temperature superconductor YBa;Cu30 7J5. This material is used to investigate the role of disorder in phase transitions, a topic of great interest in Solid State Physics. In addition, this study analyzes the interaction between vortices and columnar defects in various doses and defect morphologies, including the thermal stability of columnar defects.

We present experimental evidence of the vortex glass phase in proton irradiated Y B a:Cu:!0 -.15. For the first time, …

Public School Principals’ Perceptions In Accredited And Non-Accredited Elementary Schools Regarding Strategies To Improve Student Performance On The Michigan Education Assessment Program, Mattie P. Hampton

Dissertations

The purpose of this research study was to investigate whether principals of summary accredited elementary schools and principals of non-accredited elementary schools significantly differ in their perceptions in regards to selected strategies used to prepare students for the Michigan Education Assessment Program (MEAP). More specifically, this study attempted to address three focused interrelated questions: (I) Will principals of summary accredited elementary schools and principals of nonaccredited elementary schools significantly differ in their perceptions in regards to selected curriculum strategies used to prepare students for the MEAP? (2) Will principals of summary accredited elementary schools and principals of non-accredited elementary schools …

An Account Of Novice Phylogenetic Tree Construction From The Problem-Solving Research Tradition, Terrance E. Brisbin

Dissertations

Both the content and strategic knowledge used in phylogenetic tree construction are described to account for novice performance. A review of the literature is used to place this research with respect to studies in: problem solving studies (both expert, and novice), the history and practice of evolutionary systematics, and the teaching of evolution. The computer-based problem-solving environment is discussed along with model problems used for the research.

Each of the five research problems consists of an encoded matrix containing phylogenetic data organized by taxa and characters. Twelve participants (high school students) volunteered to solve the research problems, on their own …

Developmental, Psychosocial, And Economic Predictors Of Healthy Newborns In Michigan’S Teenage Pregnancies, Cheryl Lauber

Dissertations

Teenage pregnancy is a critical health indicator. Using a risk reduction model, this study examined the relationship between the characteristics o f the teenage mother i and her newborn. The research questions were: ( I) what risk factors are associated with poor birth outcomes, (2) is addressing each factor the best way to reduce the risk, and (3) has the overall risk changed as the birth rate has declined? Developmental, psychosocial and economic risks were identified as independent variables, while age and race were mediators.

Combining the birth certificate records of women under age 20 from 1990 through 1997 resulted …

Teachers’ Use Of Instructional Alignment In Michigan Fifth Grade Classrooms And The Relationship Of Use To Student Meap Scores In Writing, John Rasmussen

Dissertations

The purpose of this study was to determine the extent to which Michigan fifth grade teachers use components of instructional alignment in writing instruction, and then to compare the writing MEAP scores from a sample of fifth grade elementary buildings in Michigan to determine if there was a relationship between writing test scores and (a) teachers’ years of experience; (b) the degree to which fifth grade teachers use the Michigan Model Core Curriculum in writing, the Michigan Curriculum Framework, or local curriculum documents containing this curricula, to plan their lessons; (c) the degree to which teachers perceive they are implementing …

The Effect Of Presentation Media On Student Reading Comprehension, Jeffrey T. Conklin

Dissertations

The purpose o f this study was to investigate the effect of display media on reading comprehension in students with learning disabilities. This research examined two types o f display media, computer screen and paper.

Three groups of subjects were used in this study: (1) readers with learning disabilities, (2) low achieving readers, and (3) average readers. Three instruments were used to gather performance data in this study: a) a standardized measure o f reading comprehension, b) a measure of individual passage comprehension, and c) a measure of vocabulary knowledge using words from the experimental passages.

The data presented in …

Issues Of Factorial Invariance Inherent In Conceptual Change: Teachers’ Evolving Perceptions Of Classroom Practice, Cynthia C. Phillips

Dissertations

This study explored the extent to which confirmatory factor analysis (CFA) can be used to address the measurement challenges faced by evaluators engaged in the assessment of change; in particular, the interpretation of self-report survey data collected under quasi-experimental conditions. The psychometric principles behind the instruments used to measure change are built on the assumptions that the constructs of interest remain stable and that error and score magnitude alone may vary. This study examined the complications that arise, with respect to the valid use of change scores, when the constructs of interest reflect conceptual change.

CFA techniques are available enabling …

Information Retrieval And Mining In High Dimensional Databases, Xiong Wang

Dissertations

This dissertation is composed of two parts. In the first part, we present a framework for finding information (more precisely, active patterns) in three dimensional (3D) graphs. Each node in a graph is an undecoraposable or atomic unit and has a label. Edges are links between the atomic units. Patterns are rigid substructures that may occur in a graph after allowing for an arbitrary number of whole-structure rotations and translations as well as a small number (specified by the user) of edit operations in the patterns or in the graph. (When a pattern appears in a graph only after the …

Knowledge Discovery In Biological Databases : A Neural Network Approach, Qicheng Ma

Dissertations

Knowledge discovery, in databases, also known as data mining, is aimed to find significant information from a set of data. The knowledge to be mined from the dataset may refer to patterns, association rules, classification and clustering rules, and so forth. In this dissertation, we present a neural network approach to finding knowledge in biological databases. Specifically, we propose new methods to process biological sequences in two case studies: the classification of protein sequences and the prediction of E. Coli promoters in DNA sequences. Our proposed methods, based oil neural network architectures combine techniques ranging from Bayesian inference, coding theory, …

Deactivation And Enhancement Effects Of Sulfur On Supported Platinum Oxidation Catalysts, Mark Ladolcetta

Dissertations

The effects of sulfur poisoning on the oxidation activity of 1.5 % Pt/γ-Al₂O₃, Pt/TiO₂, Pt/ZrO₂, and Pt/SiO₂, were investigated in this study. Each catalyst was poisoned with an H₂S/air or SO₂/air mixture at 400°C for 24 hours and a sulfur concentration of 200 ppm. The complete oxidation of mixtures of I % CO, methane, ethane, ethene, ethyne, propane, propene, and n-butane in air were measured over fresh and sulfurpoisoned catalysts.

Non-methane alkane oxidation activity was enhanced significantly after sulfur poisoning on all four catalysts. The temperatures …

Axisymetric Vibrations Of Homogeneous And Sandwich Spherical Shells With A Hole At The Center, Wai-Kwong Wong

Dissertations

Based on Hamilton's principle and the theory of elasticity, both linear and nonlinear governing equations of motion are derived for elastic spherical shells. Most of the analysis is focused on the free axisymmetric vibrations of homogeneous and sandwich shallow spherical shells. The nonlinear behavior, which allows for small deflections, is also discussed.

The linear vibrations of homogeneous and sandwich shallow spherical shells with a hole at the center are investigated with emphasis placed on the effect of thickness-shear deformation and rotatory inertia. The effects of curvature and the size of the central hole are studied for free axisymmetric motions of …

Public Policy: Affirmative Action, Social Equity, And Employment Patterns In Michigan's Construction Industry 1966-1997, Henry Joseph Bowers

Dissertations

Affirmative action public policy did not experience much debate when it was put in place during the late 1960’s. However, the debate is occurring in the 1990s. Its merits are being weighed and there are movements locally to eliminate affirmative action policy.

The Michigan construction industry is the focus of this study. This study examined not only these employment outcome benefits, but also outlines the outcome benefit trends over thirty-one years for national employment and employment in the state of Michigan with an emphasis on the construction industry. Details regarding white-collar and blue-collar occupational grouping trends as well as unemployment …

An Investigation Into Relationships Between Alternative Assessment And Pre-Service Elementary Teachers’ Beliefs About Mathematics, David Charles Coffey

Dissertations

The purpose of this study was to examine how including alternative assessments in a reform-based mathematics course affects pre-service teachers’ mathematical beliefs. A single section of a mathematics course designed for elementary education majors that employed three different alternative assessments was the setting for the study.

A pre- and post-belief survey completed by students enrolled in the section under study represented the first level of data collection and analysis. The results of the pre-belief survey guided the selection of seven informants from the section and provided belief statements for the informants to verify during subsequent interviews. Based on the data …

Rainbow Ramsey Numbers, Linda Eroh

Dissertations

No abstract provided.

Study Of Architecture And Protocols For Reliable Multicasting In Packet Switching Networks, Shiwen Chen

Dissertations

Group multicast protocols have been challenged to provide scalable solutions that meet the following requirements: (i) reliable delivery from different sources to all destinations within a multicast group; (ii) congestion control among multiple asynchronous sources. Although it is mainly a transport layer task, reliable group multicasting depends on routing architectures as well.

This dissertation covers issues of both network and transport layers. Two routing architectures, tree and ring, are surveyed with a comparative study of their routing costs and impact to upper layer performances. Correspondingly, two generic transport protocol models are established for performance study. The tree-based protocol is rate-based …

Intermodal Transit System Coordination With Dynamic Vehicle Dispatching, Md. Shoaib Chowdhury

Dissertations

In most urban areas where transit demand is spread widely, passengers may be served by an intermodal transit system, consisting of a rail transit line (or a bus rapid transit route) and a numbers of feeder routes connecting at different transfer stations. In such a system, passengers may need one or more transfers to complete their journey. Therefore, scheduling vehicles operating in the system with special attention to reduce transfer time can contribute significantly service quality improvements. In this study two models, one for coordination of a general intermodal. transit system and another for dynamic dispatching of vehicles on coordinated …

Time Domain Measurement Of The Nonlinear Refractive Index In Optical Fibers And Semiconductor Film, Hernando Garcia

Dissertations

A new technique to measure the nonlinear refractive index n₂ in optical fibers and semiconductor films has been developed. It is based on the time delay two-beam coupling of very intense picosecond laser pulses that have been self-phase modulated in the nonlinear optical medium. The two beams are coupled in a slow responding medium that is sensitive to time dependent phase distortions. We determine that the amount of phase distortion experienced by the pulse is proportional to the nonlinear refractive index of the medium, This time domain approach can also be applied to optical fiber amplifiers in the presence …

Genetically Evolved Dynamic Control For Quadruped Walking, Giorgio Grasso

Dissertations

The aim of this dissertation is to show that dynamic control of quadruped locomotion is achievable through the use of genetically evolved central pattern generators. This strategy is tested both in simulation and on a walking robot. The design of the walker has been chosen to be statically unstable, so that during motion less than three supporting feet may be in contact with the ground.

The control strategy adopted is capable of propelling the artificial walker at a forward locomotion speed of ~1.5 Km/h on rugged terrain and provides for stability of motion. The learning of walking, based on simulated …

A Meta-Semantic Language For Smart Component-Adapters, Leon K. Jololian

Dissertations

The issues confronting the software development community today are significantly different from the problems it faced only a decade ago. Advances in software development tools and technologies during the last two decades have greatly enhanced the ability to leverage large amounts of software for creating new applications through the reuse of software libraries and application frameworks. The problems facing organizations today are increasingly focused around systems integration and the creation of information flows.

Software modeling based on the assembly of reusable components to support software development has not been successfully implemented on a wide scale. Several models for reusable software …

Active Feedback Control Of A Wake Flow Via Forced Oscillations Based On A Reduced Model, Fu Li

Dissertations

As it is well known, the flow past a cylinder consists of a symmetric recirculation bubble of vortices at small Reynolds numbers. As Reynolds number increases, the bubble becomes unstable and develops into a Karman vortex street of alternating vortices. This instability is responsible for the occurrence of large amplitude oscillations in the lift and an increase in the mean drag. It was previously shown by numerical simulation that the mechanism driving the bubble instability is well mimicked by Foppl's four dimensional potential flow model where the bubble is represented by a saddle point. In this work, we design two …

Fluidization And Soot Filtration In A Rotating Fluidized Bed, Gui-Hua Qian

Dissertations

A horizontal rotating fluidized bed (RFB) has been investigated for the removal of soot from diesel engine exhaust. This requires necessitating an understanding of the nature of fluidization, particle mixing and filtration in the RFB.

In an RFB, particles are subject to a centrifugal force which can be much larger than the force of gravity. Therefore the Geldart classification for conventional fluidized beds must be modified for rotating fluidized beds. A theoretical analysis shows that group A particles (minimum bubbling velocity U_mb > minimum fluidization velocity U_mf can shift to group B U_mb = U_mf and group …

Virtual Reality Based Creation Of Concept Model Designs For Cad Systems, Bilal Yehya Maiteh

Dissertations

This work introduces a novel method to overcome most of the drawbacks in traditional methods for creating design models. The main innovation is the use of virtual tools to simulate the natural physical environment in which freeform. Design models are created by experienced designers. Namely, the model is created in a virtual environment by carving a work piece with tools that simulate NC milling cutters.

Algorithms have been developed to support the approach, in which the design model is created in a Virtual Reality (VR) environment and selection and manipulation of tools can be performed in the virtual space. The …

Rapid Tooling By Integration Of Solid Freedom Fabrication And Electrodepostion, Bo Yang

Dissertations

Rapid tooling (RT) techniques based on solid freeform fabrication (SFF) are being studied worldwide to speed up the design-production cycle and thus keep manufacturers at a competitive edge. This dissertation presents a novel rapid tooling process that integrates SFF with electrodeposition to produce molds, dies, and electrical discharge machining (EDM) electrodes rapidly, accurately and cost effectively. Experimental investigation, thermornechanical modeling and analysis, as well as case studies reveal that integration of electroforming with solid freeform fabrication is a viable way for metal tool making.

The major research tasks and results of this dissertation study are as follows:

• Rapid electroforming tooling …

Laminar Viscous Resuspension In Two-Dimensional Channels, Wenyue Yin

Dissertations

The laminar viscous resuspension of sphere particles in two-dimensional channel with gravity and electrostatic effects is studied numerically. The constitutive equation for particles include the shear-induced diffusion flux, gravitational sedimentation flux and electro-static diffusion flux. In addition the continuity equation and the momentum equations for incompressible flow are solved for developing flow using finite element method.

The parameters in this study are ratio of particle diameter to channel height d/h, Reynolds number Re, Froude number Fr, uniform inlet particle volume fraction Φ₀, and electrostatic parameter Q. The numerical simulation included d/h from 0.03 to 0.12, Re from 5 …

An Integrated Membrane-Based Chromatographic Process For Biomolecule Isolation And Purification, Xiaoping Dai

Dissertations

Biomolecules obtained from fermentation and cell-culture processes are present in low concentrations in a complex medium/broth. For intracellular products, cells are first harvested. Subsequently, cell lysis and homogenization are undertaken to produce a homogenate. The biomolecules are next separated from the cell debris by lysate clarification. For extracellular products, the biomolecules are separated from the whole cells by clarification. The overall yield is reduced with each additional step. As the cost of bioseparation process accounts for 50-80% of the final product cost, innovations in and improvement of bio-downstream processing are greatly needed.

In this research, a cyclic process integrating a …