Digital Commons Network^™

Involvement Of Females As Authors, Editors, And Participants In Journals Concerned With Mental Retardation And Related Topics, Cari L. Porter

Dissertations

No abstract provided.

Floating Holidays: A Novel, Christopher Joseph Torockio

Dissertations

No abstract provided.

The Implementation Of The Least Restrictive Environment Provision Of The Individuals With Disabilities Education Act (Idea) For Secondary Students With Learning Disabilities On Guam, Nieves P. Flores Edd

Dissertations

This study examined the implementation of the least restrictive environment (LRE) provision of the Individuals with Disabilities Education Act (IDEA) for secondary students with learning disabilities on Guam. The research questions for the study addressed the following areas: (a) perceptions of the definition of LRE, (b) factors influencing the implementation of LRE, and (c) determination of LRE in relation to the national trends and literature. This research utilized the qualitative method of collecting and analyzing data that included interviews and review of written documents. Parents and school personnel from the secondary schools, involved in the implementation of the least restrictive …

State Regulations Of Smoking In Public Places: Determinants And Implications On The Demand For Smoking And Consumers' Behavior, Ioana Raluca Mazare

Dissertations

No abstract provided.

Factors Related To Resilience Abilities And Self-Care Practices In Adolescents, Sandra L. Solem Phd, Msn, Rn

Dissertations

Identification of resilience factors in adolescents is necessary to promote health and decrease the incidence of negative health outcomes related to risk-behaviors in this age group. The purpose of this descriptive-correlational research was twofold: (1) to investigate the inter-relationships of perceived health status, perceived self-efficacy, resilience abilities, self-care agency and self-care practices in adolescents and (2) to evaluate a revised measure, The Solem Adolescent Resilience Abilities Scale (SARAS-R). Orem's self-care theory was used as the theoretical framework for this study. The convenience sample of 100 adolescents from San Diego county in southern California were recruited through health professionals and secondary …

Attitudes Toward And Usages Of Humor Among Practicing Marriage And Family Therapists, Nicholas Todd Wilkens

Dissertations

A descriptive study was conducted exploring attitudes toward and usages of humor among marriage and family therapists. This was an internet study, novel for both St. Mary's University and for marriage and family therapy research in general.

The literature review highlighted the research and theory that has evolved over the past century, addressing the topic of humor in mental and physical health and development. It was noticed that humor has not been a significant topic of study in marriage and family therapy research, nor have attitudes toward and usages of humor been measured among any of the health professions, though …

Development Of An Integrated Photonic Sensor For Monitoring Hazardous Organics, Dianhong Luo

Dissertations

In this study, an integrated photonic sensor has been designed and fabricated for the purpose of monitoring hazardous organics in the environment. The operation of the sensor is based on the principles of the Mach-Zehnder interferometry. The sensor consists of a patterned waveguide structure made of phosphosilicate core and silica cladding. LPCVD processes were developed to produce undoped cladding and doped core silicon dioxide films. Diethylsilane (DES), Trimethylphosphite (TMP) and oxygen were used as the precursors for the deposition process. The effects of the O₂/DES ratio and deposition temperature on the properties Of SiO₂ films were investigated. …

Buckling Of Composite Conical Shells Under Combined Axial Compression, External Pressure, And Bending, Youngjin Chung

Dissertations

Conical shells are extensively used in space crafts, robots, shelters, domes, tanks, and in machinery or devices (e.g. as Belleville washers). Thus, the design of minimum weight, maximum strength, stiffened conical (and cylindrical) shells under combined loads has long been of interest to designers. The objective of this study is to improve the strength of conical shells and reduce the weight of the structure. Buckling of composite conical shells subjected to combined axial loading, external pressure, and bending is investigated using energy and finite element methods. The conical shells have single and multiple layers, different cone angle, length, and radius. …

The Structure And Stability Of Expanding And Converging Near-Stoichiometric Flames, Raymond Addabbo

Dissertations

The stability of expanding and converging premixed flames is investigated theoretically. These configurations are inherently unsteady and represent simple examples of positively (expanding) and negatively (converging) stretched flames. A new model is employed in this study that incorporates both hydrodynamic and diffusional-thermal effects. The model expands earlier works by incorporating variable transport properties, variations in the mixture strength and a more realistic dependence on viscosity.

The expanding flame is shown to remain stable at small radii provided the thermal diffusivity exceeds the mass diffusivity of the deficient reactant. However, once the flame achieves a critical size, a cellular instability appears, …

Arq Protocol For Joint Source And Channel Coding And Its Applications, Bin He

Dissertations

Shannon's separation theorem states that for transmission over noisy channels, approaching channel capacity is possible with the separation of source and channel coding. Practically, the situation is different. Infinite size blocks are needed to achieve this theoretical limit. Also, time-varying channels require a different approach. This leads to many approaches for source and channel coding. This dissertation will address a joint source and channel coding that suits Automatic Repeat Request (ARQ) application and applies it to packet switching networks. Following aspects of the proposed joint source and channel coding approach will be presented:

1. The design of the proposed joint source …

Evolutionary Polymorphic Neural Networks In Chemical Engineering Modeling, Li Gao

Dissertations

Evolutionary Polymorphic Neural Network (EPNN) is a novel approach to modeling chemical, biochemical and physical processes. This approach has its basis in modern artificial intelligence, especially neural networks and evolutionary computing. EPNN can perform networked symbolic regressions for input-output data, while providing information about both the structure and complexity of a process during its own evolution.

In this work three different processes are modeled: 1. A dynamic neutralization process. 2. An aqueous two-phase system. 3. Reduction of a biodegradation model. In all three cases, EPNN shows better or at least equal performances over published data than traditional thermodynamics /transport or …

Asymptotic Methods In Applied Waveguide Problems, Helen Martynov

Dissertations

Some of the most challenging problems in acoustics and electromagnetics involve the study of scattered fields in waveguides caused by targets of elaborate shape. The complexity of the resulting scattered field depends on the geometry of the scatterer, and exact solutions exist only for the simple geometries.

The asymptotic methods developed in this dissertation give the approximate solutions for the scattered fields in two practically important geometries: an object placed inside a stratified waveguide, and a waveguide with multiple abrupt width transitions. The solutions for these geometries are obtained by approximating the field near the target or junction by the …

Integration Of E-Business Strategy For Multi-Lifecycle Production Systems, Yanchun Luo

Dissertations

Internet use has grown exponentially on the last few years becoming a global communication and business resource. Internet-based business, or e-Business will truly affect every sector of the economy in ways that today we can only imagine. The manufacturing sector will be at the forefront of this change. This doctoral dissertation provides a scientific framework and a set of novel decision support tools for evaluating, modeling, and optimizing the overall performance of e-Business integrated multi-lifecycle production systems. The characteristics of this framework include environmental lifecycle study, environmental performance metrics, hyper-network model of integrated e-supply chain networks, fuzzy multi-objective optimization method, …

Saturation Routing For Asynchronous Transfer Mode (Atm) Networks, Jose Luis Ucles

Dissertations

The main objective of this thesis is to show that saturation routing, often in the past considered inefficient, can in fact be a viable approach to use in many important applications and services over an Asynchronous Transfer Mode (ATM) network. For other applications and services, a hybrid approach (one that partially uses saturation routing) is presented. First, the minimum effects of saturation routing are demonstrated by showing that the ratio, defined as f, of routing overhead cells over information cells is small even for large networks. Second, modeling and simulation and M/D/l queuing analysis techniques are used to show that …

Structural, Transport And Magnetic Studies Of Perovskite Bi1-X Cax Mn O3, Hyungje Woo

Dissertations

This dissertation presents an investigation of the fundamental physics of the perovskite system Bi_1-xCa_xMn0₃. This material belongs to a group of simple perovskites called the manganites which are of technological importance for magnetic device applications as read-head sensors.

The Bi_1-xCa_xMnO₃ system is known to exhibit charge ordering (and high sensitivity to magnetic fields) for a much broader range of x than the well-characterized La_1-xCa_xMnO₃ system. However, the properties of Bi_1-xCa_xMnO₃ over the entire doping range are not well understood. …

Detection Of Vapor Phase Mercury Species By Laser Fluorescence Methods, Xiaomei Tong

Dissertations

Elemental and compound mercury are often both volatile and air stable. Several mercury species emissions have been identified in off-gases from industrial processes. The high toxicity of mercury species and the presence of mercury species in municipal waste and coal have prompted a demand for a cost-effective, accurate, and rugged technique for real-time, continuous detection of mercury species vapors. Real-time, continuous emission measurements are important for process control, monitoring, and remediation. At present, there is no commercial continuous emission monitoring (CEM) technique or instrumentation to reliably monitor volatile mercury species emissions from industrial stacks. Conventional measurement methods, such as cold …

High Solid Loading Aqueous Base Metal/Ceramic Feedstock For Injection Molding, Mohammad Behi

Dissertations

Increasing volume fraction of metal powder in feedstock provided lower shrinkage. Reduction of the shrinkage results in better dimensional precision. The rheology of the feedstock material plays an important role to allowing larger volume fractions of the metal powder to be incorporated in the feedstock forinulations. The viscosity of the feedstock inainly depends on the binder viscosity, powder volume fraction and characteristics of metal powder.

Aqueous polysaccharide agar was used as a baseline binder system for this study.The effect of several gel-strengthening additives on 1.5wt% and 2wt% agar gel was evaluated. A new gel-strengthening additive was found to be the …

Electrostatic Micro Actuators For Mirror And Other Applications, Xingtao Wu

Dissertations

Micro-electro-mechanical systems (MEMS) based electrostatic micro actuators are becoming important building blocks for innovations in optical signal processing and computing systems due to their inherently small size, high density, high speed and low power consumption. Generally, the principle of operation in these systems can be described as: an electrostatic attractive force causes a mechanical rotation, translation or deformation of a mirror plate, controlling the power, phase or direction of a light beam while it propagates through some medium or through free space. The fast paced, competitive research and development efforts widely being undertaken, both in academia and industry, are demanding …

Modeling And Experimental Validation Of A Single-Feed Semi-Batch Precipitation Process, Ernesto Uehara-Nagamine

Dissertations

Crystallization is a widely practiced unit operation throughout the chemical and pharmaceutical process industries. Despite its widespread application, crystallization still suffers a disproportionate number of process difficulties due to the complexity of the steps involved in the process. In particular, the final characteristics of the product are strongly affected by the mixing conditions during the process. The development of a validated modeling approach would be highly valuable for the successful prediction of the crystal characteristics under differing mixing conditions.

In the present work, the single-feed semi-batch precipitation process of barium sulfate in a stirred tank was experimentally studied and numerically …

“In Our Own Words”: Exploring Female Psychosocial Student Development, Elizabeth Maier Marietta

Dissertations

On a continual basis student affairs professionals apply Chickering’s (1969) theory of psychosocial student development theory to their work with college students (Evans, Forney, & Guido-DiBrito, 1998; Pascarella & Terenzini, 1991). In order to best serve their students it is, therefore, critical that the theory be accurate and representative. While Chickering’s theory has received much acclaim, it has also been criticized throughout the years, particularly in the area of female student development (Straub, 1987; Straub & Rodgers, 1986; Taub, 1995; Taub & McEwen,1991). The purpose of the present study is to supplement existing theory by moving away from conceptual assertions …

Analysis Of Factors Involved In Ratings Of Treatment Acceptability For Trichotillomania, Amy J. Elliott

Dissertations

Based on the literature, trichotillomania (or chronic hair pulling) appears to be responsive to behavioral interventions, with habit reversal as the most promising intervention. Habit reversal has been shown effective with children and adults of varying levels of severity, but some have questioned the generality and acceptability of the procedure. Little is known about the acceptability of interventions for habit disorders. These two research studies were designed to answer questions regarding the acceptability of behavioral and pharmacological interventions for trichotillomania and to expand the conceptual knowledge of treatment acceptability.

Study 1 compared the acceptability of four interventions targeting trichotillomania. The …

Understanding The Relationships Among Counseling Self-Efficacy, Anxiety, Developmental Level, Coursework, Experience, And Counselor Performance, Catherine E. Kocarek

Dissertations

Bandura’s (1977, 1982) Self-Efficacy Theory and later Social Cognitive Theory (1986) provided the theoretical framework for understanding counselor self-efficacy (CSE). Bandura’s theory has been utilized in many different areas; however, in this study the focus was counselor self-efficacy (CSE) and its importance to counselor training. Variables within the CSE literature such as anxiety, trainee developmental level, amount of training, counseling experience, and counselor performance were identified. The first purpose of this study was to use the first five variables to predict their influences on counselor performance. The second purpose was to examine two variables, CSE and developmental level, at three …

A Behavioral Systems Analysis Of Textbook Quality Improvement, Elizabeth T. Suarez

Dissertations

Behavioral systems analysis is a deliberate approach to systems-design that is intended to help a system achieve its ultimate goals. The present study used behavioral systems analysis in an attempt to improve the quality o f a college-level textbook. Formative and expert evaluations were used to assess the needs of the textbook. Once the needs were determined, a six-step process of analysis, goal specification, design, implementation, evaluation, and recycling was used to meet the objectives specified by the needs assessment.

The first objective of this study was to produce and publish an improved edition of a textbook and to begin …

Vortex-Defect Interactions In High-Temperature Superconductors, Valentina Tobos

Dissertations

The topics covered in this thesis are related to two objectives: one refers to the search for methods of improving die critical current density of high-temperature superconductors, a subject which remains of continuing interest for its importance in technological applications. The other direction is aimed at clarifying the phase diagram of high-Tc materials.

The interaction between the structural defects and the vortex system plays a significant role in the capability of these materials to carry large electrical transport currents. Through proton irradiation induced defects we follow the evolution of the critical current density, and its enhancement with increasing point-like defects …

Empirical Spectral Analysis Of Random Number Generators, David Zeitler

Dissertations

Computer simulation procedures have become a staple of research and development in many fields, including statistics. The generation of pseudo random number sequences is the core of computer simulation procedures. Validity of research results often depend on the underlying validity of the generator being used.

In this work we develop the machinery for a class of tests of spatial uniformity based on a multi-dimensional Fourier transform of the empirical probability density function. The test can be adapted to specific requirements and has the added advantage that it has computational complexity that is relatively independent of the number of data points …

Learning To Construct Proofs In A First Course On Mathematical Proof, Peter R. Atwood

Dissertations

This study examined the conceptions o f proof that undergraduate students have upon entry to a transition course on mathematical proof how they develop skill in planning and reporting proofs, obstacles encountered, and effects of instruction on their performance in solidifying schema in proof-planning and proof-reporting.

The subjects were sophomores and juniors (n=16) in a transition course at a large midwestern university. The course was taught by one o f the co-authors o f the text, "Mathematical Proofs" (Chartrand, Polimeni, and Zhang, 1999, in press). Assessment of learning to construct proofs was through quizzes and a final exam developed by …

Effects Of Software Use On The Preparation Of The Individualized Education Programs (Iep’S), Nancy Ann Beukema

Dissertations

Special educators are required to process paperwork mandated by federal regulations for students with special needs. The Individuals with Disabilities Act of 1997 (IDEA ’97, Public Law 105-17) requires the evaluation of students with special needs occur as frequently as their non-disabled peers. An annual review is also mandated for each student’s individualized educational program (IEP), in order to reevaluate the future goals and objectives of the IEPs. A student identified as needing special education services is one who needs specially designed instruction and this instruction must meet the specific individual needs of that student. IDEA ‘97 mandates the need …

The Making Of A Textbook On Behavior Analysis And Autism A Behavior Analytic Approach, Sebastien Bosch

Dissertations

After deciding that a need existed for writing a textbook on autism from a behavior analytic perspective, Dr. Malott and I developed Behavior Analysis. Autism and Related Disabilities (BAARD) for use by the students enrolled in the autism practicum at Western Michigan University. As in a circular relationship, the practicum students evaluated and guided the subsequent revisions of the manuscript, and the revisions influenced the subsequent evaluations. BAARD covers all the principles and concepts of behavior analysis that are relevant to treatments and issues in autism and related disabilities and numerous treatments and phenomena specific to developmental disabilities.

During its …

The Economic Cost Of Depressive Disorders: Evidence From A Large Midwest Public University, Alketa Hysenbegasi

Dissertations

This dissertation aims to estimate the total cost of depression and the benefits of its treatment per diagnosed depressed student in Western Michigan University. To accomplish this, first, I measure the overall impact of depression and the effectiveness of its treatment on the student school performance. The empirical evidence show that diagnosed depression decreases student GPA by 0.48 points (almost a half grade), but this impairment is reduced by treatment about 0.43 points. Further, I develop and validate different measurements of student school performance and I observe that the negative effect of diagnosed depression and the positive effect of treatment …

New Teachers’ Perceptions Of Discipline-Related School Problems And Teacher Satisfaction, Amy L. Kavanaugh

Dissertations

Satisfaction The public is concerned with school safety because of recent school shootings resulting in multiple deaths. Educators are concerned that perceptions of school safety may affect new teacher attrition.

Three questions were examined in this study: (1) What is the trend of new teachers’ perceptions of discipline-related school problems? (2) Do new teachers’ perceptions of school problems vary by teacher gender, school level, size, location, and percentage of minority students?, and (3) Are new teachers’ perceptions of school problems related to their professional satisfaction?

National data gathered by the National Center for Education Statistics through the Schools and Staffing …