Digital Commons Network^™

A Resource Allocation Mechanism Based On Cost Function Synthesis In Complex Systems, Carlos C. Amaro

Dissertations

While the management of resources in computer systems can greatly impact the usefulness and integrity of the system, finding an optimal solution to the management problem is unfortunately NP hard. Adding to the complexity, today's 'modern' systems - such as in multimedia, medical, and military systems - may be, and often are, comprised of interacting real and non-real-time components. In addition, these systems can be driven by a host of non-functional objectives – often differing not only in nature, importance, and form, but also in dimensional units and range, and themselves interacting in complex ways. We refer to systems exhibiting …

Microwave Heating Of Fluid/Solid Layers : A Study Of Hydrodynamic Stability And Melting Front Propagation, John Gilchrist

Dissertations

In this work we study the effects of externally induced heating on the dynamics of fluid layers, and materials composed of two phases separated by a thermally driven moving front. One novel aspect of our study is in the nature of the external source, which is provided by the action of microwaves acting on dielectric materials. The main challenge is to model and solve systems of differential equations, which couple fluid dynamical motions (the Navie- Stokes equations for nonisothermal flows) and electromagnetic wave propagation (governed by Maxwell's equations).

When an electromagnetic wave impinges on a material, energy is generated within …

Emissivity Measurements And Modeling Of Silicon Related Materials And Structures, Sufian Abedrabbo

Dissertations

The objective of this dissertation is to investigate the major issues concerning applications of pyrometry for applications in rapid thermal processing (RTP) of silicon related materials. The research highlights of this work are:

Establishment of spectral ernissometry as a novel, reliable and reproducible technique for:

Determination of wavelength and temperature dependent reflectivity, transmissivity, emissivity and temperature, simultaneously, of silicon related materials and structures. The emissometer operates in the wavelength range of 1-20mm and temperature range of 300-1200K. The analysis of the influence of morphological effects on the radiative properties by measurement of (a) front-smooth incidence versus backside-rough incidence of singleside …

A Folder Organization Model For Information Systems : Exploring Its Architectural Expressive Power And Predicate-Based Filing, Simon Doong

Dissertations

This dissertation presents an Internal Folder Organization (I-ORG) which supplements the architectural deficiencies of the existing model - the User Folder Organization (U-ORG), to electronically model a person's filing system in the modern office environment. An I-ORG folder organization gives a logical representation of how documents of the same or different kinds are related and grouped into folders based on predefined premises. Our model is represented by a Rooted Direct Acyclic Graph (RDAG). Each node in the graph represents a folder; and folders are related by "subfolder relationship" (for capturing the "and" relation) and "virtual-folder relationship" (for capturing the "or" …

A Graph Based Process Model Measurement Framework Using Scheduling Theory, Gary Guang-Li Mou

Dissertations

Software development processes, as a means of ensuring software quality and productivity, have been widely accepted within the software development community; software process modeling, on the other hand, continues to be a subject of interest in the research community. Even with organizations that have achieved higher SEI maturity levels, processes are by and large described in documents and reinforced as guidelines or laws governing software development activities. The lack of industry-wide adaptation of software process modeling as part of development activities can be attributed to two major reasons: lack of forecast power in the (software) process modeling and lack of …

Pneumatic Fracture Propagation And Particulate Transport In Geologic Formations, Suresh Puppala

Dissertations

Pneumatic fracturing is an in situ remediation enhancement technology developed to increase the permeability of contaminated geologic formations. This technology can also be used to deliver atomized liquid and particulate supplements to geologic formations, thereby enhancing in situ processes such as bioremediation and reactive dechlorination.

The main objective of this study was the development of a mathematical model that simulates the propagation of pneumatic fractures in soil and rock formations. Pneumatic fracture propagation differs from other fluid fracturing phenomena in the propagation velocity (1-3 m/sec) and the viscosity of the fracturing fluid (1.9E-05 Pa•sec). For the purposes of model development, …

Automatic Analysis Of Electronic Drawings Using Neural Network, Yi Shi

Dissertations

Neural network technique has been found to be a powerful tool in pattern recognition. It captures associations or discovers regularities with a set of patterns, where the types, number of variables or diversity of the data are very great, the relationships between variables are vaguely understood, or the relationships are difficult to describe adequately with conventional approaches.

In this dissertation, which is related to the research and the system design aiming at recognizing the digital gate symbols and characters in electronic drawings, we have proposed: (1) A modified Kohonen neural network with a shift-invariant capability in pattern recognition; (2) An …

Adaptive Bootstrap Signal Separators For Bpsk/Qam-Modulated Wireless Cdma Systems In A Multipath Environment, Nico J.M. Van Waes

Dissertations

CDMA is an attractive multiple-access scheme, because of its potential capacity increase and its anti-multipath fading capability. For satisfactory performance, however, the effect of the "near-far" problem has to be resolved. This problem can be combated by using power-control, which, however, results in an overall reduction in communication ranges, and thus in a loss of capacity. Among other methods for mitigating the near-far problem is the use of decorrelating receivers, both of fixed type, which directly utilizes the cross-correlation of the users codes, and of adaptive type, which uses recursive algorithms that leads to signal decorrelation. Not to lessen the …

Influence Of Psychiatric Diagnostic Training On Counseling Students’ Development Of A Model-For-Helping And Professional Identity, Jerry E. Mclaughlin

Dissertations

Over the years, numerous proposals have been made in the counselor education (CE) literature about what counseling philosophy can best lead the profession to a distinctive professional identity (Bauman & Waldo, 1998; Fong & Lease, 1994; Guterman, 1994). An issue in this debate is whether psychiatric diagnostic training forms a part of a counseling philosophy (i.e., model-for-helping) and professional identity that is more focused on client psychopathology than on normal developmental issues. This study explored how training and experience in psychiatric diagnostic categories (PDCs) influenced counselors’ development of their counseling philosophy and professional identity.

Focus-group interviews were held at four …

Mdma And Learning: Effects Of Acute And Neurotoxic Exposure, Thomas P. Byrne

Dissertations

In two experiments, the effects of MDMA were examined on the acquisition of lever-press responding by rats exposed to procedures in which water delivery was delayed by 0, 10, or 20 seconds. In the first experiment, naive, water-deprived rats received an intraperitoneal injection of MDMA (0, 1.0, 3.2, or 5.6 mg/kg) prior to one experimental session. Response acquisition was observed under all conditions at all drug doses. MDMA increased both response rates and reinforcers earned in a dose-dependent fashion, but only when reinforcement was immediate. Under conditions of delay, MDMA had no effect on the number of lever presses emitted …

Angle-Resolved Studies Of Inner Shell Excitations For Argon, Krypton And Xenon Using Third Generation Synchrotron Sources, Ahmad H. Farhat

Dissertations

This dissertation, which is in the area of atomic physics, concentrates on the study of the interaction between VUV-soft X-ray radiation and atoms in the gas phase. The main area of interest is the study of Auger decay in atoms utilizing the process known as the resonance Auger effect, where an inner shell electron is excited to an unfilled orbital followed by the ejection of an Auger electron. The measurements in this thesis were performed by using the high resolution Atomic, Molecular and Optical Physics undulator beam line, which utilizes a spherical grating monochromator at the Advanced Light Source at …

Making An Early Medieval Ethnie: The Case Of The Early Slavs (Sixth To Seventh Century A.D. ), Florin Curta

Dissertations

This study approaches the problem of the early Slavs from the perspective of current anthropological theories on ethnicity. The relationship between material culture and ethnicity is also examined, with particular emphasis on the notion of style. The historiography of the subject is vast and its survey shows why and how a particular approach to the history of the early Slavs was favored by linguistically minded historians and archaeologists. The historiography of the early Slavs is also the story of how academic discourse was used for the construction of national identity.

The study of the written sources indicates that the history …

The Impact Of Selected Barriers On Students Completing Community College In Michigan, Terri Lynn Burt

Dissertations

Research studies have been conducted to investigate barriers that inhibit the ability of adult students to obtain a postsecondary education (Powell, 1989; Shields, 1990). These studies suggest that there are three distinct categories that could be used to describe this phenomenon: (1) situational, (2) dispositional, and (3) institutional. The overall purpose of this study was to determine what barriers, if any, are experienced by nontraditional African-American students in selected Midwest community colleges in comparison to White adult students according to selected demographic variables (e.g., age, sex, marital status, number of children, employment, status, income, and race). More specifically, this study …

A Generalization Of Cayley Graphs For Finite Fields, Dawn M. Jones

Dissertations

A central question in the area of topological graph theory is to find the genus of a given graph. In particular, the genus parameter has been studied for Cayley graphs. A Cayley graph is a representation of a group and a fixed generating set for that group. A group is said to be planar if there is a generating set which produces a planar Cayley graph. We say that a group is toroidal if there is a generating set that produces a toroidal Cayley graph and if there are no generating sets which produce a planar Cayley graph. Characterizations for …

A Computer/Tutorial System Compared With A Workbook/Tutorial System For Presenting Instructional Material To At-Risk Elementary School Students, Vincent O. Hodge

Dissertations

Two different ways of presenting instructional material and reacting to students’ responses were compared. One, taking advantage of several features of multimedia instruction involved a desktop computer and various computer-presented consequences of correct and incorrect responses (largely chosen by the student). The other consisted in presenting the same instructional materials (the SRA primary curriculum) in a workbook form with tutors' comments and praise as the main form of response consequence. The two methods were compared with respect to various measures of student and system performance, including student accuracy (percent correct responses), types of errors, amount of correct response repetition (over-responding), …

The Effects Of Counselor Skills Training On Levels Of Counselor Cognitive Complexity, David K. Duys

Dissertations

This study measured the impact of an intensive counseling skills training course on levels of cognitive complexity in novice counselors. Graduate level counseling students were assessed at the beginning of a basic counseling skills training course and again at the end of the course by obtaining written responses to a stimulus questionnaire. A control group was recruited consisting of other graduate counseling students who were taking other courses during the same time interval and who were not exposed to the basic counseling skills course. Participants in the control group were tested using the same instrument and their scores were compared …

Laterality Of The Perception Of Computer Presented Written Sexual Words By Right-Handed Males And Females, Randall W. Stewart

Dissertations

The right hemisphere of males has been shown to possess a greater capacity for accurate perception of emotional non-verbal material (pictures) than the left hemisphere. The same is true for females, but with a smaller difference between the two hemispheres. Some previous research has partially confirmed these relationships using tachistoscopic presentation of emotional words. The present study, using briefly exposed computerpresented sexual words, compared perception accuracy with respect to a sexuality rating of clearly sexual and clearly non-sexual words, in the right versus the left visual field, and with males versus females. As with previous research using verbal stimuli, the …

The Relationship Between Organizational Culture And The Practice Of Program Evaluation In Human Service Organizations, Lorraine Marais

Dissertations

There are many obstacles for human service organizations in evaluating programs. Some of these barriers are the difficulty in defining human behavior and the change that needs to be evaluated, human service programs that take a long time to show results, agency capacity to do evaluation, and cost (Young, Hollister, Hodgkinson, & Associates, 1993). Another subtle yet powerful influence on the practice of evaluation in nonprofit organizations may be organizational culture (Schein, 1990). If an organization is going to employ self-evaluation, an organizational culture may be needed that will support such efforts. This study was designed to assess the relationship …

Market Values In Education: A Case Study Of Its Effect On The Principal's Model For School Governance In Alberta, Dean G. Lindquist Edd

Dissertations

Political bodies, facing, increased pressures to improve the quality of education offered to students, are shifting to a philosophy that imposes large scale market forces such as parental choice and school competition onto educational systems in order to coerce school improvement. This shift may be prompting school-based administrators to shift school governance practices to reflect these market values. This shift, occurring in Alberta (Canada), is founded in government policy that articulates the option of educational choice for parents. Presently the government policy promotes these market values in education by providing full funding to public, separate, and charter schools, and partial …

The Relationship Of Self-Esteem, Learned Resourcefulness And Social Support To Health-Related Quality Of Life In Long-Term Cancer Survivors, Leli W. Pedro Dnsc, Ms, Rnc, Ocn

Dissertations

Increased survival and advances in oncology research demand that health professionals attend to the gap in knowledge regarding health-related quality of life (HRQL) variables associated with the unique sequelae of cancer in the long-term (LT) cancer survivor. Research in this area may direct the development of effective interventions to increase the HRQL of LT cancer survivors. The study's purpose was to describe the relationships between self-esteem, learned resourcefulness, and social support to HRQL as well as their predictive value to HRQL for LT cancer survivors. A quantitative, descriptive, correlational, and noninterventional design was used to describe the relationship of self-esteem, …

A Comparison Of Reported Teacher Selection Practices Of Elementary Principals In Michigan To Recommended Selection Methods, John E. Jarpe

Dissertations

Teacher selection is a complex, critical school personnel function. School leaders in Michigan’s districts will be hiring more teachers as projected enrollment increases and pending teacher retirements combine to open teaching positions. This study examined the effectiveness of teacher selection practices as they compared to selection methods described in administrative textbooks, journal articles, and research studies.

Thirty-six Michigan elementary principals reported their school building and district selection procedures. Qualitative analysis focused on their transcribed responses to interview questions about the aspects of teacher selection. The principals represented public schools that combined varying grade levels of kindergarten through sixth grade.

Thirteen …

A Kierkegaardian Understanding Of Self And Society: An Existential Sociology, Chris L. Jakway

Dissertations

In examining the history and development of existential sociology, it becomes clear that in its initial phases it was not intended to oppose traditional sociological research, but to complement it. I intend to show that the contemporary chasm between the methodologies can be narrowed with a reconsideration of their common roots in the work of G.H. Mead and the symbolic interactionists. Existential sociologists today offer a practical synthesis that combines that theoretical heritage with philosophic ontology dating back to the writings of Soren Kierkegaard.

My conceptual goal is reveal how the existential philosophy of Kierkegaard, while not irrational or solipsistic, …

A Study Of The Knowledge Structure Of Expert, Intermediate, And Novice Subjects In The Domain Of Physics, Jennifer L. Discenna

Dissertations

The objective of this research was to investigate the knowledge structure in physics by describing the knowledge of experts, intermediates, and novices. A review of the literature on expertise, physics knowledge, and conceptual structure provided two competing representations of physics knowledge: one defined as a hierarchy of models arranged from general to specific models, the second defined by theories which link knowledge together.

In order to investigate the two representations described above, a reiterative categorization task was employed. This task resulted in a hierarchical sort with larger piles at the top of the hierarchy and smaller piles at the bottom …

The Influence Of Promise Keepers On Fathers’ Involvement With Their Children, Michael J. Walcheski

Dissertations

This study explores the influence of Promise Keepers (PK) on fathers’ involvement with their children. The large numbers o f men involved with PK and the anecdotal success of fathers and their families have created considerable dialogue in the popular press. However, there have been no empirical studies to date that contribute data about the influence of PK on father involvement.

The conceptual framework informing this study combined father involvement and postmodern feminist perspectives. A father involvement perspective emphasizes fathers’ presence, their capability and strengths, the moral dimension to fathers’ responsibility for their children, and factors that establish responsible fathering. …

Surface Models Of Finite Geometries, Ramon Manuel Figueroa-Centeno

Dissertations

The standard non-Euclidean geometries, hyperbolic geometry and elliptical geometry, both arise by negating the parallel postulate of Euclid. Both these geometries share with Euclidean geometries an infinitude of points and lines. But also possible are many finite geometries. Among these are the class of projective geometries PG(m,q) of projective dimension m (m > 2) and the k-configurations. These mathematical objects, although primarily geometric in nature, provide related structures of combinatorial interest: block designs. These have applications in scheduling problems and the design of experiments for statistical analysis. Recently, A. T. White has added a topological flavor to the study …

Perturbed Hamiltonian System Of Two Parameters With Several Turning Points, Myeong Joon Ann

Dissertations

No abstract provided.

Lesbian, Gay, And Bisexual Doctoral Students Mentoring Relationships With Faculty In Counseling Psychology A Qualitative Study, Julianne S. Lark

Dissertations

Mentoring is often endorsed within broader discussions of the education and training of students in counseling and psychology (e.g., Ellis, 1992; Gelso & Fretz, 1992; Kilburg, 1991), although, there is very little in the professional literature about these relationships (Carden, 1990). Out of the small amount of professional training literature on lesbian, gay, and bisexual (LGB) issues, Buhrke and Douce (1991) have provided the only discussion of counseling psychology trainees who themselves are LGB. There are no other published sources that discuss the practice of mentoring with LGB students in counseling psychology.

This qualitative study investigated (LGB) doctoral students’ mentoring …

The Relationship Of Gender Role Conflict To Male College Students' Receipt And Use Of Violence In Heterosexual Dating Relationships, Brady R. Harnishfeger

Dissertations

This dissertation assessed the relationship of attitudes toward aggression, dating relationship seriousness, and aspects of men's conflicted beliefs and expectations about the male role to involvement in physically violent dating relationships. Grounded in conflict theory, which states that conflict is an integral part of all close relationships, this research hypothesized that more accepting attitudes toward aggressian, more serious dating relationships, higher levels of concerns with success, power, and competition, and greater tendencies toward restrictive emotionality would be related to, and would combine to represent significant predictors of, men's receipt and use of physically violent conflict tactics while dating.

The sample …

Preparation For The Gre, Corina Groeger

Dissertations

The present research consisted of two empirical studies and a literature review. The first study was a systematic replication of the studies by Miller, Goodyear-Orwart, and Malott (1996) and Vunovich and Malott (1997). Fourteen undergraduate students and one graduate student participated in four intensive, extensive, structured Graduate Record Examination (GRE) preparation courses that met for seven weeks and lasted between 99 and 140 hours. The courses offered a monetary reward for students who met a minimum of 92% for attendance and participation during the course. The results of this study showed statistically significant mean improvements of 145 points for the …

Electron Emission Following The Interaction Of Slow Highly Charged Ions With Solids, Joseph W. Mcdonald

Dissertations

The interaction of highly-charged ions with surfaces involves many excitation processes of the surface atoms and the bulk material. One such process, the emission of electrons from surfaces due to the potential energy of the incident ions has been studied. The experimental results presented here confirm that the majority of electrons emitted as a result of highly-charged ions interacting with a solid surface have energies of about 20 eV. Auger processes contribute a smaller fraction of the total emitted electrons with increasing Z o f the projectile. This contribution to the total electron emission yield is found to be less …