Digital Commons Network^™

Implementing Organizational Change In A Public Agency, David E. Freed

Dissertations

A major challenge that faces most institutions is that of adapting to and managing change. The leadership of an organization is a key focal point for analyzing how change is accomplished.

This study examines both a theoretical and practical approach to the study of organizational and cultural change. The focus is a public agency and the actions and decision processes of the top leadership relating to organizational and cultural change during the period 1992 to 1995.

From the theoretical perspective, Karl Weick’s approach called sensemaking is examined and a model is created. Sensemaking is an activity that is an explanatory …

Detection And Robustness Of Digital Image Watermarking Signals : A Communication Theory Approach, George F. Elmasry

Dissertations

The detection and robustness of the watermark signal is studied from a communications point of view. The contributions of this dissertation are presented in two parts. The first part, which covers the detection aspect, introduces a new digital image watermarking approach that embeds meaningful information in a copyright protection watermark signal; demonstrates the need to approach the watermark signal as a power-constrained signal; studies the relationship between the watermark signal dimension and the image capacity to the signal; explains the similarities and differences between detecting the watermark signal and detecting a signal over a spread-spectrum communication channel; and analyzes the …

Protein And Endotoxin Interactions And Endotoxin Removal From Protein Solutions, Liping Li

Dissertations

The investigation objectives of this study include: endotoxin disaggregation by proteins; protein concentration effect on protein-endotoxin binding and endotoxin removal; size exclusion high performance liquid chromatography (SE-HPLC) studies on endotoxin dissociation by bovin serum albumin (BSA); use of Ca⁺² to re-aggregate endotoxin in hemoglobin solutions and the subsequent removal of endotoxin by ultrafiltration; quantitative determination of Ca⁺² effects on endotoxin removal and protein yield in a two-stage ultrafiltration.

It is known that some proteins can disaggregate endotoxins and form complexes with lipopolysaccharides (LPS). It is also known that Ca can act as "bridges" to aggregate LPS in aqueous …

The Role Of Race In The Perpetuation Of Inadequate Housing, William H. Dozier

Dissertations

The purpose of this study was to examine the influence of race as a factor in the perpetuation of inadequate housing in the United States. The idea is not that race causes poor housing conditions, but rather, that housing units occupied by Black households are less likely to be repaired than those occupied by white households. Literature suggests that several institutionalized factors may place unit repair beyond the ability of the renting or owning household. Using data collected through the American Housing Survey (AHS), perpetuation of inadequate housing was measured from 1987 to 1991. The research investigated 2,139 units that …

Evaluation Of Raman Spectroscopy And Ruby Piezospectroscopy As Tools For Investigating The Corrosion Of Metallic Alloys, Daniel P. Renusch

Dissertations

Stainless steel system components that operate in high temperature oxidizing environments obtain protection from corrosion by means of thermally grown chromia and alumina scales. Ongoing investigations of protective scales utilize a battery of experimental and theoretical techniques. A technique which has received little attention is Raman scattering. The reason for its limited use has been long data acquisition times required to obtain suitable spectra from thin surface oxides. Because advances in detection systems, namely the multichannel CCD (charge coupled devices), have recently provided dramatic improvement in the sensitivity of Raman scattering experiments, we decided to reevaluate the technique as a …

Coping Strategy And Social Support Differences Among Copd Patients: Effects On Psychological Well Being, Functional Status, And Health Care Utilization, Terri Belville-Robertson

Dissertations

This descriptive study examined coping strategies and social support among thirty-three patients with moderate to severe Chronic Obstructive Pulmonary Disease (COPD) to assess relationships to psychological and functional status, and health care utilization. More specifically, the qualitative and quantitative differences in coping strategies and social support were examined in relation to anxiety, depression, activity level, and use of emergency and inpatient medical services. Subjects participated in a one-session screening that included a brief clinical interview, battery of questionnaires and exercise tolerance test. Health care utilization data were obtained from subjects’ medical records. Subjects' primary support persons also provided collateral data …

Evaluating The Social Acceptability Of Persons With Habit Disorders: The Effects Of Topography, Frequency, And Gender Manipulation, Douglas W. Woods

Dissertations

Literature suggests that children who exhibit habit disorders are less socially acceptable than children who do not exhibit such disorders. This series of studies investigated the social acceptability of adults who exhibit habit disorders. In Studies 1 and 2, undergraduate students rated the social acceptability of individuals who exhibited motor tics, vocal tics, hairpulling, and no habit. Results showed that the individuals with no habit were more socially acceptable than the individuals who exhibited either motor tics, vocal tics, or hairpulling.

In Study 3, videotapes were created in which actors simulated motor tics, vocal tics, Tourette’s Syndrome, and Trichotillomania. The …

Active Local Volume Displacement Cancellation Of A Vibrating Baffled Beam, Marcellin Zahui

Dissertations

An active noise control apparatus is developed. The device reduces the sound radiated from a vibrating clamped beam. The attenuation of the sound field is obtained through minimization of local volume displacements of the vibrating beam. Two single-input/single-output cancellation devices are used. Each device employs a motion sensor and an acoustic actuator. The actuator is a loudspeaker equipped with a pressure sensor to detect its volume displacement. The motion sensor signal is related to the local volume displacement of the structure which is then reduced by a loudspeaker driven with an equal but opposing volume displacement. The volume displacement sensors …

Skin: A Work Of Fiction, Kellie Wells

Dissertations

In Skin, a polyphonous novel, a community of characters similarly metaphysically vexed and similarly grappling with issues of selfhood and identity intersect and catalyze in one another moments of recognition. These brief self-reckonings suggest to the characters that though the quest to discern their place in the universe is a plagued one, it is not without value as it at least results in faint glimmers of enlightenment. Ultimately, how ever, these flickerings of understanding inch the characters no closer to the big certainties they seek, and they therefore must determine that the process itself, or, more to the point, …

Another Person's Skin: Imagining Race In The Works Of Crane, Dunbar, Cather And Stevens, Lisa M. Durose

Dissertations

This study is interested in the motivations behind certain authors' attempts to, in the words of Willa Cather, "enter into another person's skin"~in the desires compelling writers to cross, transgress, or perhaps transcend those barriers that have historically divided people in the world: barriers of color, class, and gender. In particular it seeks to examine the works of four early twentieth century writers who undertake what these days is considered risky: transracial and transethnic crossings. By relying on biographical, cultural, and historical sources, I explore the strategies American writers Stephen Crane (1871-1900), Paul Laurence Dunbar (1872- 1906), Willa Cather (1873-1947), …

Intuitive Understanding Of Time And Space At The Age Of Four, Josephine Barry-Davis

Dissertations

The purpose of this study was to test the central hypothesis that “children by the age of four years construct accurate and lasting conceptions o f time (past, present, future) and space (near and far away).” In order to test this hypothesis the researcher relied on qualitative research guidelines developed and published in recent years to address social science and educational research issues. The research design is especially applicable to young children where the researcher assumes the role of participant observer. In order to control for the context of the research, the children were observed for time and space cognitive …

A Bare Unpainted Table: A Manuscript Of Poems, Gladys Cardiff

Dissertations

The poems in this collection reflect Cardiff's bi-cultural Native American and Euro-American inheritance. The book title comes from a sixteenth century chronicle in which the native peoples of the Americas are seen as "simple gentiles" living under the "lawe of nature " . These narrative poems refute the Eurocentric notion that American Indians can be likened to a "bare table" or "a blank sheet of paper to be written upon ". The poem s celebrate her Indian heritage and also engage allusively with Western and Asian tradition s and conventions. Sometimes edgy, sometimes honorific, the juxtaposition of traditions in these …

An Analysis Of Nine K-12 School Districts That Have Established Membership With The Coalition Of Essential Schools, Shari A. Peters Kitchen

Dissertations

In the late 1970s, Ted Sizer, professor of education at Brown University, and a team of researchers traveled the country visiting dozens of secondary schools. The purpose of these visits was to understand the American high school by observing it firsthand. Sizer reported his findings in 1984 in Horace's Compromise: The Dilemma of the American High School.

In response to the compromises raised in Horace's Compromise, 12 schools volunteered to become the Coalition of Essential Schools. The Coalition rests on a set of nine Common Principles, which include intellectual rigor, simple and universal goals, personalized school, graduation by exhibitions …

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 …

Improving Special Education Teachers' Use Of Data-Based Instruction, Steven D. Goodman

Dissertations

The data-based decision model involves frequent measures of student performance (i.e., 2 - 5 times per week), frequent analysis of performance data (weekly or bi-weekly), and the application of decision rules. In the first study, we surveyed 406 special education teachers state-wide. Results of the survey suggest that the databased decision model is not generally practiced by special educators in the field. Just over one quarter of the respondents report to assessing student performance frequently enough to qualify as using the model. Only 10% of respondents indicate that they generally graph student performance. Additionally, less than 23% of respondents who …

“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 …

A Study Of The Relationship Between Transformational Leadership And Teacher Attitudes, Scott Palczewski

Dissertations

One hundred Michigan public high schools were randomly selected to participate in a study of the relationship between transformational leadership and teacher attitudes. Forty-eight high schools with enrollments ranging from 237 students to 1,730 students responded, a response rate of 48%. The study required that each building principal complete the Multifactor Leadership Questionnaire. Designed by Bass and Avolio (1990), the instrument uses 45 questions to identify the relative level of transformational leadership exhibited by the building principal.

Five dependent variables including teacher motivation, teacher satisfaction with administration, follower identification with work, teacher willingness to disagree with administration and teacher attitudes …

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 …

The Effects Of Sibling-Implemented Training On Social Behaviors Of Autistic Children, Cristin L. Sullivan

Dissertations

The present study investigated the effectiveness of sibling-implemented pivotal response training (PRT) on the social behaviors of five children with autism. Using a multiple-baseline design across sibling pairs, participants were trained to use PRT while playing with their brother’s with autism. Measures of play skills and social behavior were assessed during baseline, training, sibling-independent play, and two-month follow-up sessions. Also, parents were asked to rate randomly selected video-tape segments from baseline and sibling-independent play sessions. The results indicated that siblings were able to learn effectively and implement PRT strategies following training. All of the children with autism demonstrated an increase …

An Analysis Of Grade-Level Expenditures Of At-Risk Funding Among Districts Of Different Economic Status In The State Of Michigan, Benard A. Meyer

Dissertations

Many of the recent financial reforms failed to address the needs of at-risk children. Effective solutions to the problems of the educationally disadvantaged must include changes within the schools, how the schools are funded, and how the schools spend their funding. Michigan’s 1994 finance reform included a funded plan for “unequal treatment of unequals” directed for the support of at-risk students. This fund was called Section 31a Program for At-Risk Pupils and involved a 230 million dollar compensatory education funding allowance for students at risk of school failure. This study presented here will determine if there is a relationship between …

The Use Of Curriculum-Based Measurement To Evaluate The Effects Of A Remedial Education Program, Michael D. Hixson

Dissertations

This study examined the effectiveness of two Direct Instruction programs: Corrective Reading: Decoding and Connecting Math Concepts. The effectiveness of the interventions was evaluated using a single-subject experimental design with curriculumbased measurement (CBM) probes as the main means of assessment. Other methods of assessment included standardized achievement tests, school reports, and pre- and postcurriculum- based assessment probes. The CBM probes for all students were sensitive to the effects of the interventions, although there was a great deal of variability in the CBM reading probes and little correspondence across methods of assessment. The results indicate that the two Direct Instruction programs …

Adaptive Interference Cancelation Techniques For Multicarrier Modulated Systems, Matthijs A. Visser

Dissertations

Current wireline systems and wireless broadcasting systems employ multicarrier modulation (MCM). This includes the high-rate digital subscriber line (HDSL), digital audio broadcasting system (DAB) and the digital terrestrial television broadcasting system (dTTb). Multicarrier modulation is also envisioned for high-speed indoor wireless local area networks (WLAN). Additionally, multicarrier code division multiple access (MC-CDMA), a hybrid of orthogonal frequency division multiplexing (OFDM) and CDMA, is proposed for the downlink (base-to-mobile) of a 3rd generation wireless system as part of the IMT-2000 standardization process.

The performance of an MC-CDMA system--similar to a direct sequence CDMA (DS-CDMA) system--is limited by the presence of multiple …

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 …

Chemical Reactions And Mass Transport In Emulsion Liquid Membrane, Huifang Fan

Dissertations

Emulsion liquid membrane (ELM) systems are an important technique for wastewater cleanup. For this purpose, emulsion globules are dispersed in wastewater (external phase), each emulsion globule consisting of many tiny aqueous droplets (internal phase) enclosed in oil (membrane phase). Hazardous chemicals in the wastewater are transported into the internal droplets by mass transfer mechanisms.

Since Li first invented an ELM system in the 1960s, much research effort has been devoted to experimentally finding the optimal conditions for ELM recovery of various chemicals. Such studies would have benefited greatly from the guidance of mathematical models, especially those that provide analytical predictions. …

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 …

Developing Techniques For Enhancing Comprehensibility Of Controlled Medical Terminologies, Huanying Gu

Dissertations

A controlled medical terminology (CMT) is a collection of concepts (or terms) that are used in the medical domain. Typically, a CMT also contains attributes of those concepts and/or relationships between those concepts. Electronic CMTs are extremely useful and important for communication between and integration of independent information systems in healthcare, because data in this area is highly fragmented. A single query in this area might involve several databases, e.g., a clinical database, a pharmacy database, a radiology database, and a lab test database.

Unfortunately, the extensive sizes of CMTs, often containing tens of thousands of concepts and hundreds of …