Digital Commons Network^™

Instructional Leadership In Guam's Public Elementary Schools, Evangeline Quitugua San Nicolas Edd

Dissertations

This study explored the current instructional leadership behaviors of elementary principals in Guam as perceived by the principals and teachers, and examined their perceptions on which instructional leadership functions should be shared or delegated in schools. The Principals' Instructional Management Rating Scale, developed by Dr. Phillip Hallinger and modified by the researcher, was used to gather data for this study. Four hundred eighty teachers (53%) and eighteen principals (81%) in Guam's public elementary schools participated, and there was no evidence of non-response bias. From this study, findings revealed that both principals and teachers shared the same perceptions regarding their principals' …

Employee Receptivity To Three Hundred Sixty Degree Feedback Systems As A Function Of Employee Trust And Employee Commitment: An Exploratory Study, Gregory G. Stump Edd

Dissertations

The purpose of this quantitative exploratory study was to determine what affect, if any, employee trust, employee commitment, psychological androgyny (an employee sex-role inventory), and various demographic variables have on employee receptivity to 360-degree feedback (R360). Two organizations participated in the study. The first is a large university located in New York; the second is a small consulting firm located in California. A total of 62 participants responded to the 77-item Internet-based survey. The survey was composed of psychometrically adequate constructs developed in earlier studies. Employee trust, a 12-item construct, consisted of 8 items that measured trust in supervisor and …

Experimental And Modeling Studies Of Formation Of Products Of Incomplete Combustion And Chlorocarbon Incineration, Roman Brukh

Dissertations

The two-stage combustor facility was used to investigate the process of chlorocarbon incineration and formation of products of incomplete combustion. For this purpose methylene chloride was used as a chlorine-containing compound. The propose of this research was to obtain a better understanding of the incineration process of chlorocarbons, such as methylene chloride, especially regarding its destruction efficiency and formation of products of incomplete combustion. For measuring near-real time very low concentrations of benzene and methylene chloride, on-line microtrap gas chromatography system was used.

The experimental system was validated using a known combustion reaction mechanism from literature. Modeling of combustion process …

Handgrip Pattern Recognition, Zong Chen

Dissertations

There are numerous tragic gun deaths each year. Making handguns safer by personalizing them could prevent most such tragedies. Personalized handguns, also called "smart" guns, are handguns that can only be fired by the authorized user. Handgrip pattern recognition holds great promise in the development of the smart gun.

Two algorithms, static analysis algorithm and dynamic analysis algorithm, were developed to find the patterns of a person about how to grasp a handgun. The static analysis algorithm measured 160 subjects' fingertip placements on the replica gun handle. The cluster analysis and discriminant analysis were applied to these fingertip placements, and …

Joint Buffer Management And Scheduling For Input Queued Switches, Dequan Liu

Dissertations

Input queued (IQ) switches are highly scalable and they have been the focus of many studies from academia and industry. Many scheduling algorithms have been proposed for IQ switches. However, they do not consider the buffer space requirement inside an IQ switch that may render the scheduling algorithms inefficient in practical applications.

In this dissertation, the Queue Length Proportional (QLP) algorithm is proposed for IQ switches. QLP considers both the buffer management and the scheduling mechanism to obtain the optimal allocation region for both bandwidth and buffer space according to real traffic load. In addition, this dissertation introduces the Queue …

Acoustical Characterization And Parameter Optimization Of Polymeric Noise Control Materials, Emile N. Homsi

Dissertations

The sound transmission loss (STL) characteristics of polymer-based materials are considered. Analytical models that predict, characterize and optimize the STL of polymeric materials, with respect to physical parameters that affect performance, are developed for single layer panel configuration and adapted for layered panel construction with homogenous core. An optimum set of material parameters is selected and translated into practical applications for validation.

Sound attenuating thermoplastic materials designed to be used as barrier systems in the automotive and consumer industries have certain acoustical characteristics that vary in function of the stiffness and density of the selected material. The validity and applicability …

Closed-Loop Control Of Vortex Shedding By Means Of Lorentz Force, Xiaoyun Sun

Dissertations

When an incompressible fluid flows past a circular cylinder, vortex shedding occurs as soon as the Reynolds number exceeds about 40. Vortex shedding is usually undesirable, as it generates a significant increase in drag, as well an oscillating lift force on the cylinder leading to cross-stream structural vibrations. Flow control to either delay the appearance of vortex shedding or fully suppress it has attracted much attention during the last decade. The focus of this dissertation is to control vortex shedding from a circular cylinder by applying an external electromagnetic field. As in previous works, the latter is generated by electrodes …

Evaporating Crossflow Sprays In Gas-Solid Flows, Guangliang Liu

Dissertations

Injection of evaporating sprays into gas-solid flows is encountered in many engineering processes such as energy production industry and chemical industry. The phenomenon involves phase change, three-phase interactions, heat and mass transfer. All of these characteristics control the process efficiency, pollutant production and product quality. However, very limited studies are available on the evaporating spray jets in gas-solid flows, especially on the spray evaporation rate within a gas-solid medium. A combined study of experiments and theoretical analysis has been carried out here to investigate the fundamental mechanism of evaporating Crossflow spray jets in gas-solid flows.

In this study, in addition …

Study Of Vapor/Gas Permeation Using Thin Immobilized Liquid Membrane, Gordana Obuskovic

Dissertations

To improve liquid membrane selectivity and stability for removal of vapor and gases from a gas stream, a thin immobilized liquid membrane (ILM) has been studied. Low vapor pressure liquid solvent/solutions were immobilized in part of the micropores of a hydrophilic, hydrophobic or ceramic hollow fiber substrate. To prepare such thin ILMs, three approaches were used: evaporation of the a volatile solvent; acrylic acid-grafted hollow fibers providing a thin hydrophilic layer; pressurization technique.

For removal of volatile organic compound (VOC), a thin ILM of silicone oil incorporated in the micropores of a hydrophobic hollow fiber with a silicone rubber coating …

Thermochemistry And Kinetics In Pyrolysis And Oxidation Of Oxygenated Chlorocarbons And Chlorinated Aromatics, Li Zhu

Dissertations

Thermochemical. properties, Δf_H°₂₉₈, S°₂₉₈, and Cp°(T) (5<=T/K<=6000), are determined using different ab inifio and density functional theory methods for three chloromethyl radicals, CH₂Cl, CHCl₂, CCl₃, all chlorobenzenes from monochlorobenzene to hexachlorobenzene, and all chlorophenols from ortho-, meta-, para-chlorophenol to pentachlorophenol. The B3LYP/6-31G(d,p) method is used in the structure optimization. The B3LYP/6-31G(3df,2p), QCISD(T)/6-3 I G(d,p), and CB S-Q methods are used in single point calculations of total electronic energies. Harmonic vibration frequencies are scaled for zero point energies and thermal corrections. Isodesmic reaction(s) are utilized at each calculation level to determine Δf_H°₂₉₈ of each species. Contributions to S°₂₉₈ and Cp°(T) from …

Robust And Efficient Video/Image Transmission, Xi Min Zhang

Dissertations

The Internet has become a primary medium for information transmission. The unreliability of channel conditions, limited channel bandwidth and explosive growth of information transmission requests, however, hinder its further development. Hence, research on robust and efficient delivery of video/image content is demanding nowadays.

Three aspects of this task, error burst correction, efficient rate allocation and random error protection are investigated in this dissertation. A novel technique, called successive packing, is proposed for combating multi-dimensional (M-D) bursts of errors. A new concept of basis interleaving array is introduced. By combining different basis arrays, effective M-D interleaving can be realized. It has …

Unity Through Duality: An Exploration Of Paradox In Olivier Messiaen's Vingt Regards Sur L'Enfant-Jesus Vol. I, Deirdre Hatch

Dissertations

Olivier Messiaen is one of the major musical figures of the twentieth century. His music draws on a diverse set of influences, yet always remains unique and entirely his own. His unwavering religious beliefs constitute the source of inspiration behind most of his music. Vingt Regards sur ['Enfant-Jesus for solo piano was composed in 1944. It forms a powerful and personal musical statement concerning one of the central mysteries of the Catholic faith, the Incarnation. As such, it is an important work within Messiaen's output. Its musical language and spiritual message are typical ofMessiaen's style.

Higher Education Administrators And Students With Disabilities: A Survey Of Administrator Knowledge And Training Needs, Maribel S. Guillermo Edd

Dissertations

Students with disabilities enroll in two-year institutions at a higher rate than in four-year institutions. The California community college system, which is the largest system of higher education in the world, enrolled 2,609,365 students with disabilities during the 2000–2001 academic year. The purpose of this study was to focus on California college administrators and their role in: (a) setting a climate that supports students with disabilities and (b) serving as a resource to faculty and staff. Administrators were surveyed regarding their (a) current knowledge and training needs; (b) personal and professional experience with individuals with disabilities; and (c) utilization of …

Examining An Observation-Based Model Of Professional Development For Teachers, Donna M. Marriott Edd

Dissertations

Public education is undergoing a process of reculturation prompted by standards-based reform initiatives. Student content standards suggest fundamental changes in the way teachers, schools, and districts think about and do their work. These substantive reform efforts require a parallel reorganization in professional development processes. Traditional models that rely on episodic, large-scale workshops are insufficient to support teachers to meet the demands of a standards-driven system. San Diego City Schools has developed an innovative approach to teacher training that is context and situation specific. The observation-based model of professional development utilizes a unique training environment and process. A fully functioning classroom …

Exploring Teachers' Experiences With The Colonial Williamsburg Teacher Institute, Emily M. Schell Edd

Dissertations

This qualitative study explored the experiences of ten teachers who participated in the Colonial Williamsburg Teacher Institute (CWTI) during an 11-year period. The researcher used in-depth interviewing to identify why these teachers participated in this institute, what they experienced and learned during the institute, and how the institute influenced their teaching as well as student learning of early American history. The participants in this study identified similar reasons for applying to the institute, which included a desire to gain more knowledge and skills to improve their teaching of early American history. Seven themes emerged as participants described their experiences during …

Teachers' And Students' Perceptions Of Seventh- And Eighth-Grade Science Education In A Selected Seventh-Day Adventist Union Conference, Marcel Andre Sargeant

Dissertations

Problem. Science education has long been a great concern in the United States, where less than one-third of the students perform at or above the proficient level. The purpose of this study was to investigate the status of the science program in a selected Union Conference of the Seventh-day Adventist school system. Specifically, this study investigated the perceptions of teachers and students regarding the extent to which the science program meets the criteria of the National Commission on Mathematics and Science Teaching for the 21st century and to what extent these criteria are related to academic performance as indicated by …

A Study Of Technology Implementation In Two School Districts: The Dynamics Of Leadership And Change, Rebecca D. Gillespie Edd, Ma, Ba

Dissertations

This qualitative case study investigated the role administrative leadership plays in organizational change related to the infusion of technology into district programs and pedagogical practices. School districts have been engaged in a struggle to incorporate new generations of technological advancements in meaningful ways for their students. Instructional reform and measurable performance-based outcomes are frequently conflated with the pressure to implement effective technology programs that ensure the No Child Left Behind federal mandates are met while ensuring judicious use of district funds. While technology has the potential to transform the educational process, it must align with the cultural uniqueness of the …

The Contribution Of Education, Experience, And Personal Characteristics On The Reflective Judgment Of Students Preparing For School Administration, Margaret Rae Macdonald

Dissertations

Problem. School administrators must use high levels of reasoning to deal with the complexities of today's educational system. Reflective thinking has proven to be an effective administrative tool in problem solving, staff supervision, and school improvement, yet preparation programs for school administrators have limited knowledge about what contributes to reflective judgment in their students, thus making it difficult to develop curriculum and pedagogy to enhance reflection.

Method. The Reflective Judgment Model provides the theoretical framework for this mixed methods research design that explores contributory variables that contribute to the reflective judgment of educational leadership students. The Reasoning about Current …

The Effects Of Cooperative Learning Versus Traditional Classroom Instruction On Cognitive Achievement, Critical Thinking, And Attitudes Toward Learning In Teams In A Physician Assistant Program, Scott L. Massey

Dissertations

Problem. Physician assistants are required to possess critical thinking skills and excellent intellectual skills to achieve the level of autonomy expected by supervising physicians. No scientific research has been identified to determine the most effective means of educating the physician assistant students. The purpose of the research study was to determine whether a statistical difference exists between students educated in a cooperative learning environment versus a traditional lecture environment. The dependent variable utilized in this study included critical thinking skills, cognitive achievement, and attitudes towards learning in teams. Using an experimental research design, students were educated in a cooperative learning …

Intention To Pursue Post-Secondary Education, And Related Factors, Among Jamaican Senior High School Students, Teran T. Milford

Dissertations

Purpose of the Study. The proportion of female students in post-secondary schools in Jamaica is approximately twice that of their male counterpart. This is in contrast to the observation that the proportion of male and female students in elementary and secondary schools is about the same. Little or no studies have been conducted to examine factors related to the disproportion of male and female students in tertiary institutions. Therefore, the purpose of this study was to examine the perception of senior high school students regarding their intention to pursue post-secondary education, and to determine the extent to which the value …

Perceptions Of Problem-Based Learning And Attitudes Towards Its Adoption Among K-12 Teachers In Seventh-Day Adventist Schools In Florida, Eileen A. Pilliner

Dissertations

Problem

One of the founders of Seventh-day Adventist education, Ellen G. White, advocated learning through, practical experiences and critical thinking. In 1997, the Seventh-day Adventist Church recommended problem-based learning (PBL) as a preferred teaching practice for its North American K-12 schools. However, Brantley and Ruiz observed that many Seventh-day Adventist educators feel inadequate to use this method of instruction. Little information exists anywhere concerning teachers’ awareness and perceptions o f problem-based learning (PBL) or factors related to its use. This study examined the relationship between PBL, philosophy of teaching, preferences for PBL teaching components, and perceived barriers to PBL adoption …

The Impact Of Early-Intervention/Prevention Services On The Northville Public Schools, Robert O. Sornson

Dissertations

Problem

Whereas some school districts have continued to observe high rates of reading failure and increasing rates of special education identification, others have looked at program or system changes to reduce early learning failure. This study is an analysis of the impact of early intervention practices in the elementary schools of an upper-middle-class community.

Method

Cost analyses of district programs were compared to a hypothetical district with state average levels of special education identification. Special Education eligibility rates were tracked over a 10-year period. Data were collected from surveys given to Instructional-Support Team personnel, general education teachers, elementary administrators, and …

A Study Of The Influence Of Birth Order And Other Variables On Student Perceptions Of School Effectiveness In A Southwestern Michigan County, Hamil Tobias

Dissertations

Problem. There is an increasing demand for quality education. In his initiative for education reform, U.S. President George W. Bush promoted the concept of no child left behind, in which he calls for more accountability. It is useful to examine student perceptions of how well the education system functions. Instead of a monolithic view, their perceptions were analyzed by birth order, gender, and ethnicity. The purpose of this study was to determine to what extent student perceptions differed by their birth order, gender, and ethnicity.

Method. This study utilized a 4 x 2 x 2 (birth order by …

Geochemical And Isotopic Characteristics Associated With High Conductivities In A Shallow Hydrocarbon-Contaminated Aquifier, Franklyn D. Legall

Dissertations

In-situ vertical resistivity probes (VRPs) deployed at a hydrocarboncontaminated site in SW Michigan showed high soil conductivities within the contaminated zone. Within this zone, different phases of hydrocarbon impact were recognized, namely, zones with residual and dissolved phase hydrocarbons (RDH) and zones where these phases coexist with free product (RDFH). Bulk soil conductivities were highest ( 12 to 30 mS/m) in the zone with RDFH compared to the RDH zone (10 to 25 mS/m). Groundwater chemistry and stable carbon isotope data from closely spaced vertical samples within the anomalous conductive zones were used to provide evidence for biodegradation and to …

Predicting A Passing Outcome On The National Council Licensure Examination For Registered Nurses By Associate Degree Graduates, Patricia M. Collins

Dissertations

This ex-post facto study was conducted to determine whether grades in pre-program science courses, pre-program cumulative grade point average (GPA) and grades in selected nursing theory courses predict pass/fail performance on the National Council Licensure Examination for Registered Nurses (NCLEX-RN) for graduates of an Associate Degree Nursing (ADN) program. A small, rural community college in western Michigan participated in the study. The subjects included 159 graduates, (143 females, 16 males) admitted to the program beginning fall semester 1992 through May 2001. Data was obtained from the college data files. The independent variables were the four pre-program science courses, Anatomy and …

Geoelectrical Response Of An Aged Lnapl Plume: Implications For Monitoring Natural Attenuation, Douglas D. Werkema Jr.

Dissertations

The geoelectric stratigraphy at a site impacted with light non-aqueous phase liquids (LNAPLs) is investigated for its link to natural biodegradation, its contribution to the conductive model for aged (i.e. mature) LNAPL contaminated sites, and the relationship to the natural hydrologic regime. The highest conductivities (lowest resistivities) were observed in portions o f soils where LNAPL was in residual and free phase. Corroborating evidence from bacteria enumeration from soil close to the vertical resistivity probe (VRP) installations show orders-of-magnitude increase in both heterotrophic and oil degrading microbes at the depths where the conductivity was at a maximum. The coincidence o …

Load Balancing And Congestion Avoidance Routing, Konstantinos N. Kokkinos

Dissertations

Today’s high speed backbone networks are expected to support a wide range of communication-intensive applications. One of the most important issues in Quality of Service (QoS) is efficient routing. Many QoS routing solutions have been published lately for different criteria of QoS requirements and resource constraints. In this dissertation we focus on the design of regular network topologies and suggest efficient routing schemes to reduce the probability of hot spot creation in the network. Furthermore, we provide a detection of congestion mechanism that reroutes traffic to maintain balancing with small communication cost. Several theoretical results relatively to network traffic balancing …

Robust Residuals And Diagnostics In Autoregressive Time Series, Kirk W. Anderson

Dissertations

One of the goals of model diagnostics is outlier detection. In particular, we would like to use the residuals, appropriately standardized, to “flag” outliers. Hopefully, our (robust) procedure has yielded a fit that resists undue influence by outlying points, while simultaneously drawing attention to these interesting points via residual analysis. In this study we consider several different methods of standardizing the residuals resulting from autoregression. A large sample approximation for the variance of rank-based first order autoregressive time series residuals is developed. This provides studentized residuals, specific to the time series model and estimation procedure. Simulation studies are presented that …

New Statitstical Methods For The Estimation Of The Mean And Standard Deviation From Normally Distributed Censored Samples, Abou El-Makarim Abd El-Alim Aboueissa

Dissertations

The main objective of this dissertation is to estimate the mean /x and standard deviation cr of a normal population from left-censored samples. We have developed new methods for calculating estimates for the mean and standard deviation of a normal population from left-censored samples. Some of these methods based on traditional estimating procedures. A new method of obtaining the Cohen maximum likelihood estimates for fx and cr without the aid of an auxiliary table will be introduced. This new method will be used to extend Cohen table of estimating the Cohen A-parameter that is required for calculating the maximum likelihood …

On Rank-Based Considerations For Generalized Linear Models And Generalized Estimating Equation Models, Diana R. Cucos

Dissertations

This study discusses rank-based robust methods for estimation of parameters and hypotheses testing in the generalized linear models (GLM) and generalized estimating equations (GEE) setting. The robust estimates are obtained by minimizing a Wilcoxon drop in dispersion function for linear or nonlinear regression models. In addition, diagnostic tools for outliers and influential observations are being developed. These models are generalizations of linear and nonlinear models. They allow for both nonlinear mean functions and heteroscedasticity of their random errors. This makes them quite useful in practice. Rank-based inference has been developed for linear models over the last thirty years. This inference …