Digital Commons Network^™

Nonmigrainous Pediatric Headache Management: Thermal Biofeedback And Parent Guidelines, Richard E. Arndorfer

Dissertations

This study explored the utility of the combination of thermal biofeedback and parent-mediated pain behavior management guidelines as a treatment for children experiencing nonmigrainous headache. Five children, ages 8 to 14, were assigned to baselines of varying lengths prior to receiving treatment. Four of the five children demonstrated significant reductions in one or more headache parameters (frequency, duration, average peak intensity) following treatment. The utility of thermal biofeedback and parent-mediated guidelines are supported as a treatment for children suffering from nonmigrainous headache.

A Comprehensive Approach For Evaluation Of Groundwater Vulnerability To Contamination, Shafiul H. Chowdhury

Dissertations

Groundwater vulnerability to contamination from surface sources was evaluated for Nottawa Creek Watershed, Calhoun County Michigan using AQUIPRO and DRASTIC vulnerability methods. A geographic information system (GIS) was used to analyze and map the data. Forty groundwater samples were collected following a statistical sampling protocol from private wells. Samples were analyzed for nitrate-N and atrazine. Atrazine was not detected (detection limit 0.1 ppb) in any of the samples. Five samples contained detectable nitrate-N (detection limit 0.05 mg/L). Due to insufficient chemical data, the relative AQUIPRO and DRASTIC vulnerability scores could not be compared with the frequency of occurrences o f …

“All Things Considered”: A Comparative Case Study Examining The Commercial Presence Within Public Radio, Peter P. Nieckarz Iii

Dissertations

This dissertation addresses the commercial presence within public radio. A case study of three NPR affiliate stations was conducted to determine to what extent public radio is being influenced or compromised by increased commercial rationality. It also addresses how they have been able to resist commercialism and remain true to the original ideals of public radio. The research included active interviews, observations, and document analyses of data collected from field research at each o f the three stations in the sample. Analysis of the data indicates that public radio stations have grown more commercial due to declining tax-based subsidies, and …

The Role Of Access In Evaluating Distance Learning Program Effectiveness, Carole A. Richardson

Dissertations

Distance learning technologies are increasingly used within public post-secondary institutions as a way to deliver courses to students remote from the home campus. Many proponents of distance learning argue that its use provides a method for reaching the educationally undeserved, i.e., those who lack access to higher education. If a distance learning program decreases access barriers, then it is congruent with traditional American values of providing universal access to education to all citizens. Distance learning program evaluation strategies, therefore, need to include a means of measuring the extent to which access goals are met.

The purpose of this study is …

Cadmium, Chromium And Lead In Environmental Samples : Speciation And Determination, Hsing-Hui Yu

Dissertations

Heavy metals are important contaminants in many environmental media. This work focuses on the improvement of current methods for water and sediment analysis for three metals, cadmium, chromium and lead. Batch ion exchange was used for water speciation and a microwave assisted sequential extraction scheme was developed for sediment characterization. The developed methods were applied to a group of environmental samples.

The exchangeable species of these metals in water were preconcentrated on ion exchange resins. These include the bioavailable free ions and weakly complexed ions. Metals sorbed on particles and strongly complexed ions, less bioavailable, were eliminated. The method was …

Applications Of A Microtrap For On-Line Monitoring Of Volatile Organics, Chaohua Feng

Dissertations

Microtrap is made by packing a narrow metal tubing with adsorbents. The advantage of a microtrap is that it can be heated and cooled in the order of seconds. It has been used previously as a concentration cum injection device for on-line gas chromatography and also monitoring non-methane organic carbon in air emissions. In this research breakthrough and desorption characteristics of the microtrap were studied. A two-stage microtrap system was developed to reduce breakthrough while making sharp injection for GC separation. Microtrap was also used as a concentrator cum injector in on-line mass spectrometry. Finally, a microtrap based, continuous non-methane …

Development Of Membrane Extraction Systems For Measuring Trace Level Organic Compounds In Water, Xuemei Guo

Dissertations

The presence of volatile organic compounds (VOCs) in ground and surface water resources poses a threat to public health. The measurement of these trace level contaminants in water is of significant importance. Conventional methods for analysis of trace volatile organic compounds in water include purge and trap, head space analysis, and solid phase microextraction (SPME). While these are excellent laboratory techniques, none of them can be used for continuous, on-line monitoring of water streams. Membrane separation of organic compounds from water provides an exciting possibility for on-line extraction and analysis. In previous investigations, water continuously flowed on the feed side …

Long Term Risks Associated With Brownfield Containments, Shailesh Shirish Chirputkar

Dissertations

The sites at which the development is hindered by real or perceived contamination are called as Brownfield sites. It is a common trend in industry to develop these types of sites with surface and peripheral containments. It might prove unwise to develop the sites in this manner from a long term perspective without considering the associated risk. Because of this, a model has been proposed for long term risk assessments of brownfield containments.

Objectives of this study were to develop a contaminant transport model for flow of contaminants towards the surface and peripheral containments inside the site, a model for …

Utilization Of Processed Fly Ash In Mortar, Walairat Bumrongjaroen

Dissertations

Grinding process is introduced to provide fine particles of coal fly ash that enhances the strength gain of cement mortars. It is discovered that grinding can make all the studied fly ashes more suitable for concrete use at higher replacement value than previously anticipated even when the effect of high carbon content is considered.

In this study, new mechanisms for strength gain of fly ash mortars are proposed. They are dispersion and nucleation, which are results from the presence of fly ash in the cement mortar. These effects are shown to enhance the hydration of cement. The pozzolanic action of …

Physical And Geotechnical Characterization Of Water Treatment Plant Residuals, Swamy C. Basim

Dissertations

The study of Water Treatment Plant (WTP) residuals is of recent origin and very little information is available in literature regarding these residuals. These waste materials have high solids contents, even in the mechanically dewatered condition, making it difficult to handle. These, along with stringent environmental regulations have forced the water utilities to look for new disposal options for these residuals. For this purpose as well as for evaluating suitable options for the beneficial reuse of residuals, it is essential to characterize WTP residuals.

As the dewatered residuals are plastic, the researcher may be prompted to treat these materials as …

On Scheduling Input Queued Cell Switches, Shizhao Li

Dissertations

Output-queued switching, though is able to offer high throughput, guaranteed delay and fairness, lacks scalability owing to the speed up problem. Input-queued switching, on the other hand, is scalable, and is thus becoming an attractive alternative. This dissertation presents three approaches toward resolving the major problem encountered in input-queued switching that has prohibited the provision of quality of service guarantees.

First, we proposed a maximum size matching based algorithm, referred to as min-max fair input queueing (MFIQ), which minimizes the additional delay caused by back pressure, and at the same time provides fair service among competing sessions. Like any maximum …

Automatic Document Classification And Extraction System (Adoces), Xuhong Li

Dissertations

Document processing is a critical element of office automation. Document image processing begins from the Optical Character Recognition (OCR) phase with complex processing for document classification and extraction. Document classification is a process that classifies an incoming document into a particular predefined document type. Document extraction is a process that extracts information pertinent to the users from the content of a document and assigns the information as the values of the “logical structure” of the document type. Therefore, after document classification and extraction, a paper document will be represented in its digital form instead of its original image file format, …

Development Of Computer Model And Expert System For Pneumatic Fracturing Of Geologic Formations, Brian Michael Sielski

Dissertations

The objective of this study was the development of a new computer program called PF-Model to analyze pneumatic fracturing of geologic formations. Pneumatic fracturing is an in situ remediation process that involves injecting high pressure gas into soil or rock matrices to enhance permeability, as well as to introduce liquid and solid amendments. PF-Model has two principal components: (1) Site Screening, which heuristically evaluates sites with regard to process applicability; and (2) System Design, which uses the numerical solution of a coupled algorithm to generate preliminary design parameters.

Designed as an expert system, the Site Screening component is a high …

Fdtd-Based Full Wave Co-Simulation Model For Hybrid Electromagnetic Systems, Tong Li

Dissertations

In high-frequency ranges, the present electronic design automation software has limited capabilities to model electromagnetic (EM) systems where there are strong field effects influencing their characteristics. In this situation, a full-wave simulation tool is desired for the analysis and design of high-speed and non-linear EM systems. It is necessary to explore the interaction between the field and electronic components during a transient process when field effects are more significant. The finite-difference time-domain (FDTD) technique receives growing attention in the area of EM system analysis and simulation due to its simplicity, flexibility and robustness. It is a full-wave simulation method that …

Crossing The Line: Experiences Of The Formerly Homeless Living Past Homelessness, Susan Marie Bennett Dnsc, Msn, Fnp, Rn, Cs

Dissertations

This grounded theory study explored the experiences of formerly homeless individuals and families who have moved from homelessness into stable housing. This was an ethnographic study and involved the researcher staying in an east coast shelter where some of the formerly homeless participants had become staff members and reside. Data analysis was informed by dimensional analysis. Moving out of homelessness was the studies perspective. Findings of the study revealed the following dimensions that related the formerly homeless's experiences: (a)reacting to circumstances, or how they became homeless; (b)surviving as homeless, or how they lived while homeless; (c)crossing the fine, or what …

Periodicity And Disorder, Simeon D. Simeonov

Dissertations

We have studied four examples of periodicity and disorder in nature and the phenomena associated with them.

In the first chapter of the dissertation we present an introduction to this work.

In the second chapter, the photonic band structures of two types of zinc blend structures are computed using the plane wave expansion method. Both structures are formed from an array of dielectric spheres in a vacuum background. In a first type zinc blend structure the spheres have the same size but different dielectric constants. In a second type of structure we keep the dielectric contrast of the spheres the …

The Relationship Between Principals' Leadership Characteristics And Characteristics Of Public Middle Schools, Linda S. Schneider-Rediske

Dissertations

Principals’ perceptions of the relationship between middle school leadership characteristics and the relevance and use of middle school characteristics were examined in this study. A systematic random sampling procedure was used to select principals from public middle schools in the State of Michigan. A survey instrument was developed to measure the variables. These variables were determined based on a review of the literature. The reliability of the instrument was obtained using the Cronbach’s alpha coefficients. Spearman rank-ordered correlations were used to determine the strength and direction of the relationships of each hypothesis.

The findings from this study suggest that there …

Diversity, Collaboration, Reflective Practice, And Technology In Professional Education Programs: Strategic Choices For Higher Education, Caren L. Sax Edd

Dissertations

Today's postsecondary students are entering American institutions of higher education (IHEs) with different experiences, expectations, and learning needs than students of previous generations. Calls for more diverse campuses, advanced technology, and lifelong learning are maintaining pressure on IHEs to adjust to new demands for a more encompassing vision as traditional approaches are no longer adequate. The challenges are tremendous; the responses must be extensive and reflective if higher education is to achieve its goals of preparing students for productive and meaningful lives. This study investigated student experiences in a yearlong professional education program that was focused by four strategic choices …

Investigation Of Thermal Contact Resistance At A Plastic-Metal Interface In Injection Molding, Lakshminarayanan Sridhar

Dissertations

Thermal contact resistance (TCR) at the plastic-metal interface is one of the parameters required for the simulation of plastic processing techniques such as injection molding. However, the available data is both unreliable and insufficient due to the difficulties involved in measuring this parameter. The effects of thermal contact resistance on the heat transfer in plastics processing with particular reference to injection molding of thermoplastics is investigated using combined experimental measurement techniques, parametric studies and numerical analysis.

TCR under steady state conditions has been determined experimentally at typical thermoplastic-mold metal interfaces for an amorphous and a semi-crystalline polymer using a one-dimensional …

An Understanding Of Selected Familial Dynamics As They Relate To The Prevention Of Substance Use Among Youth From St. Martin, Vincent A. David

Dissertations

Problem. Various studies examined the relationship between youth, drug use, and the role that families play in influencing such use. Thus, it is evident that youth use drugs, and thereasons for their drug use vary widely. However, there have not been widespread research done on the youth who do not use drugs, particularly from a family perspective. Also, no research study has been known to be conducted on St. Martin of such nature.

Purpose. This study sought to gain an understanding on how selected familial dynamics functioned within three families in deterring their youth from becoming involved in …

The Community College Coach: Leadership Practices And Athlete Satisfaction, Jodi P. Coffman Edd

Dissertations

Community college coaches and athletes completed the Leadership Practices Inventory (LPI), to assess the leadership practices of coaches of various sports. Soccer coaches and their athletes were also surveyed to assess the impact of the congruence of leadership practices ratings upon athlete satisfaction. Two samples were taken from Spring and Fall, 1998 sports: (a) 225 full-time head coaches of team sports in which there was a male and female equivalent in California's community colleges, and (b) 280 men's and women's soccer athletes. The descriptive statistics conducted indicated that there were more similarities than differences between the male and female coaches, …

The Relationship Between Religious Beliefs, Moral Development, Self-Control, Peer Pressure, Self-Esteem, And Premarital Sex, Jacynth A. Fennell

Dissertations

Problem. The purpose of this study was to ascertain if there is any relationship between religious beliefs, moral development, self-control, peer pressure, self-esteem, and premarital sex, providing for a comprehensive framework for understanding this phenomenon.

Method. Subjects were 148 undergraduates attending three schools in different geographic regions within the United States. Subjects were primarily between 18 and 25 years old. A survey was completed by 148 students. Data-were analyzed using Analysis of Variance and Independent-Samples t test.

Results. Of the 148 students who participated in the study, 38% were Black, Hispanic, 38% were White, non-Hispanic, 10% were …

The Relationship Between Afrocentric Worldview And Marital Satisfaction In African-American Couples, Ganz E. Ferrance

Dissertations

Problem. It has been argued that many of the theories attempting to explain African-American culture derive from a Eurocentric framework, and thus paint a negative and pathological picture of the African-American family and community. What is needed is research examining African-American family life which holds Afrocentric culture and beliefs as its foundation. Consequently, this study is an attempt to investigate the relationship between Afrocentric cultural consciousness (Afrocentric worldview) and marital satisfaction of spouses of African descent.

Method. This study used a correlational and ex post facto research design involving surveys to assess the relationship between the dependent variable …

Self-Esteem, Personal Control, Optimism, Extraversion, And The Subjective Well-Being Of Midwestern University Faculty, Shawn Lee Zimmerman

Dissertations

Problem and Purpose

Although recent summaries of subjective well-being have illuminated four primary covariants, little research has been done that addresses the interaction and combined effects of these variables, limiting the development of theory and practice, especially in the population of university faculty. This research sought to address the interaction of self esteem, personal control, optimism, and extraversion when measured together, and how they combine in relation to subjective well-being in a sample of Midwestern university faculty.

Methodology

A total of 233 surveys was collected from two Midwestern university faculty populations. These surveys measured self-esteem, personal control, optimism, extraversion, subjective …

Panther Stories: A Gendered Analysis Of The Autobiographies Of Former Black Panther Members, Monica Marie White

Dissertations

Literature on the influences and contributions of women within the Black Panther Party has been scant. Much of the documentation is written by and is about males. This dissertation uses the autobiographies of former Black Panther members, both male and female, to explore their experiences while in the organization. Each author's political ideology and his/her perceptions of sexism and racism and distinctions in the writing style of men and women are considered. Seven single-authored autobiographies written by former Panther members were analyzed both individually and comparatively. There were similarities among all members of the group, such as their support of …

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 …

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 …

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 …