Digital Commons Network^™

The Effects Of Intensive, Structured Study On Gre Verbal And Quantitative Scores, Jan Marie Miller

Dissertations

This research served as a follow-up to previous research (Goodyear-Orwat and Malott, 1994) in which students engaged in self-study utilizing various study materials. Three courses (spring, summer, and fall) were offered to further examine the effects of intensive, structured study on Graduate Record Examination verbal and quantitative scores.

Twenty undergraduates enrolled in Graduate Record Examination preparatory courses studied from 66 to 105 hours. An attendance and participation contingency was established to encourage adequate study time. The courses were structured to allow students to assess and manage their own performance, utilizing standard, self-instructional texts and computerized drill programs. Students worked at …

Autocorrelation In Single-Subject Data: A Meta-Analytic View, Laura L. Methot

Dissertations

Recent work by Huitema and McKean (1991, 1994a, 1994b, 1994c, in press) has shown that the most frequently used statistical methods for performing conventional time-series analyses lead to gross distortions of results when these approaches are applied in the context of the typical behavioral research study. Most of these problems could be avoided if researchers were aware that the time-series methods recommended in many areas are not generally needed. The appropriate evidence regarding the need for complex time-series methods requires a meta-analysis of the autocorrelation present in behavioral studies. The project involved: (a) sampling several hundred research articles published in …

The Use Of Analogies In An Industrial Environment To Facilitate Status Changes For Radiation Science Concepts, Charles Thomas Lohrke

Dissertations

The focus of this study was the effect of two analogies on the status of industrial technical center employees for three radiation science concept areas. The analogies used were of melting ice and falling tacks. The three radiation concept areas examined were radioactive material decay, radioactive material half-life, and radioactive material activity.

Forty-four adults participated in the study. Thirty-five of these participants took pre- and post-lesson multiple-choice tests to determine the effect that the analogies had on their intelligibility of the three radiation science concept areas. Nine participants also took pre- and post-lesson clinical interviews to assess their intelligibility, plausibility, …

An Exploration Of The Relationship Between Critical Thinking Skills And Preferred Learning Styles Of First Year Nursing Students, Gloria J. Clocklin

Dissertations

The purpose of this study was to determine if a relationship existed between the manner in which nursing students preferred to learn and their ability to think critically. First year nursing students (N = 197) from four colleges in a rural Midwestern geographic region were the subjects for the study. Students represented practical nursing, associate degree nursing, and baccalaureate degree nursing programs and were all in their first nursing course. Entire cohort groups from each college were included in the study.

The Kolb (1985) Learning Style Inventory and the Watson-Glaser Critical Thinking Appraisal (WGCTA, Watson & Glaser, 1980) were administered …

Classroom Personalities Of Effective Teachers Within A Technical College Setting, Fred Manley

Dissertations

This study used student ratings to examine relationships between instructor personality and teaching effectiveness for technical college faculty. Research was specifically conducted to address three questions: (1) what personality traits are associated with effective teaching, (2) do the personality profiles of effective teachers differ by academic area, and (3) are there personality dimensions that distinguish above average from below-average instructors.

Students enrolled in classes taught by instructors randomly selected from the accounting, computer information systems, marketing, and office occupations departments at five Wisconsin technical colleges rated their instructors on 29 personality traits and 18 teaching behaviors. Pearson product-moment correlations were …

Step Domination In Graphs, Kelly Lynne Schultz

Dissertations

One of the major areas in Graph Theory is domination in graphs. It is this area with which this dissertation deals, with the primary emphasis on step domination in graphs.

In Chapter 1 we present some preliminary definitions and examples. In addition, a background of the area of domination is presented. We then introduce the concepts that lead to step domination.

In Chapter II we formally define the concept of step domination and give several examples. We determine the minimum number of vertices needed in a step domination set for many classes of graphs. We then explore step domination for …

Probability Polynomials For Cubic Graphs In The Framework Of Random Topological Graph Theory, Esther Joy Tesar

Dissertations

Topological graph theorists study the imbeddings of graphs on surfaces (spheres with handles). Some interesting questions in the field are on w hat surfaces can a graph be 2 -cell imbedded and how m any such imbeddings are there on each surface. The study of these and related questions is called Enumerative Topological Graph Theory. Random Topological Graph Theory uses probability models to study the 2-cell imbeddings. It generalizes the results from Enumerative Topological Graph Theory (which is the uniform case, p= 1/2) to an arbitrary probability p.

We study the model where the sample space consists of all labeled, …

Efficient Dominating Sets In Oriented Trees, Quan Yue

Dissertations

No abstract provided.

Asymptotic Diagonalizations Of A Linear Ordinary Differential System, Feipeng Xie

Dissertations

No abstract provided.

The Teachers' And Principals' Perceptions Of The Impact Of Operation Physics On The Teaching Of Elementary Science In Michigan Schools, Brenda Prater Earhart

Dissertations

The purpose of this study was to determine the impact of Michigan Operation Physics (MOP) on the teaching and learning of basic physics concepts in the elementary classroom as perceived by both the teachers and principals of those teachers. In addition, the study sought to identify the teachers' and principals' perceptions of the principal's role in promoting science at the elementary level.

The method used for this study was survey research. Questionnaires were mailed to Michigan Operation Physics participants, non- Michigan Operation Physics participants, and the principals of those teachers in southwestern Michigan.

Findings of this study were that teachers' …

A Wellhead Protection Study Of A Small Agricultural Community In Glaciated Terrain, As A Model For Wellhead Protection Efforts By Similar Communities, Cole Kevan Lovett

Dissertations

The purpose of this study was to create a wellhead protection approach for a small town in a rural watershed that could be used by other, similar, communities.

Lacustrine clay and melt-out till interbedded in outwash sands and fine gravel, separate an unconfined aquifer from a deeper aquifer. The lower aquifer was determined to be semiconfined due to (a) high vertical conductivity, (b) lack of continuity in the clay/till, (c) absence of significant seasonal water level changes, and (d) tritium levels above 1-2 tritium units in deep wells.

Tritium level falls and water age rises along flowpaths. A low-high-low pattern …

Teachers' Perception Of Instructional Leadership And Student Achievement, David Anspaugh

Dissertations

The focus of this study was to investigate the teachers' perceptions of the principal's leadership behaviors and how the achievement level of the students was affected. Three middle schools representing the Prairie View Public Schools were used in the study. These middle schools were Sparta Middle School, High Plain Middle School, and Middleville Middle School.

A staff survey was given to the 33 teachers in each of the buildings. The survey dealt with 18 leadership behaviors of the principal. The teachers were asked to rate the behaviors as to their importance to them and if the behaviors existed. The survey …

Mapping Of Portable Parallel Programs, Song Chen

Dissertations

An efficient parallel program designed for a parallel architecture includes a detailed outline of accurate assignments of concurrent computations onto processors, and data transfers onto communication links, such that the overall execution time is minimized. This process may be complex depending on the application task and the target multiprocessor architecture. Furthermore, this process is to be repeated for every different architecture even though the application task may be the same. Consequently, this has a major impact on the ever increasing cost of software development for multiprocessor systems. A remedy for this problem would be to design portable parallel programs which …

Document Preprocessing And Fuzzy Unsupervised Character Classification, Shy-Shyan Chen

Dissertations

This dissertation presents document preprocessing and fuzzy unsupervised character classification for automatically reading daily-received office documents that have complex layout structures, such as multiple columns and mixed-mode contents of texts, graphics and half-tone pictures. First, the block segmentation algorithm is performed based on a simple two-step run-length smoothing to decompose a document into single-mode blocks. Next, the block classification is performed based on the clustering rules to classify each block into one of the types such as text, horizontal or vertical lines, graphics, and pictures. The mean white-to-black transition is shown as an invariance for textual blocks, and is useful …

Composite Beam Analogy Fracture Model (Cbafm) : A Non-Linear Fracture Mechanics Model For Concrete, Mohammed Enamul Haque

Dissertations

The main objective of this dissertation is to develop a simple non-linear fracture mechanics model for the determination of fracture mechanics parameters for concrete, such as fracture process zone length (rp), critical fracture energy release rate (Gic), critical stress intensity factor (KO and fracture energy (GF). The fracture process zone (FPZ) is modeled as a damaged non-elastic cohesive band where the extent of damage due to microcracking varies from no damage at the boundary of FPZ to complete crack surface separation at the notch or macro-crack tip. The proposed method can predict theoretically both the pre-peak and post-peak load versus …

Visual Pattern Recognition Using Neural Networks, Jenlong Moh

Dissertations

Neural networks have been widely studied in a number of fields, such as neural architectures, neurobiology, statistics of neural network and pattern classification. In the field of pattern classification, neural network models are applied on numerous applications, for instance, character recognition, speech recognition, and object recognition. Among these, character recognition is commonly used to illustrate the feature and classification characteristics of neural networks.

In this dissertation, the theoretical foundations of artificial neural networks are first reviewed and existing neural models are studied. The Adaptive Resonance Theory (ART) model is improved to achieve more reasonable classification results. Experiments in applying the …

Biodegradation Of Mixed Wastes : Basic Kinetics And Reaction Engineering For Cyclic Reactor Operation, Kung-Wei Wang

Dissertations

This study dealt with the determination of the detailed kinetics of the biodegradation of mixed substrates by pure cultures, and with reaction engineering studies of bioreactors employed in treatment of substitutable substrates under cyclic operation.

In the first part of the study the degradation of phenol and 4-chlorophenol (4-CP) by two strains of Pseudomonas species was investigated. Strain P. putida 0 was found to be capable of utilizing both phenol and 4-CP as sole carbon and energy sources. This suggests that this strain follows the ortho-cleavage pathway for the aromatic ring. Strain P. putida N could grow on phenol, and …

Dichloromethane Pyrolysis And Oxidation : Formation Of Chlorinated Aromatic Precursors To Pcdd/F, Hong-Ming Chiang

Dissertations

The pyrolysis and oxidation of dichloromethane is studied in a tubular reactor at 1 atmosphere pressure, residence time between 0.3 to 2.0 seconds and in the temperature range 680 - 840°T. Four reactant concentration ratios are:
I. CH₂Cl₂ : Ar =1 : 99 II. CH₂Cl₂ : CH₄ : Ar = 1 : 1:98
III.CH₂Cl₂ : O₂ : Ar = 1:4 : 95 IV. CH₂Cl₂: CH₄ : O₂ Ar = 1: 4: 94

The degradation of dichloromethane, intermediate product formation and decomposition, and final …

Micromechanics Of Hot Mix Asphalt Material Formulation And Numerical Simulation, Kuo-Neng G. Chang

Dissertations

Hot Mix Asphalt (HMA), a highway and airfield pavement material, is heterogeneous, granular, and composite. It is traditionally modeled as a homogeneous material using continuum mechanics or semi-empirical methods. As a result, the above models either neglect or over-simply component reactions, failing to predict field performance problems resulting from particle segregation. This research presents micromechanical modeling, a novel approach that accounts for the components.

A micromechanical model is developed for HMA by modeling it as an assembly of asphalt cement coated particles. The asphalt cement is modeled as a viscoelastic material. To represent asphalt cement, several viscoelastic elements (i.e. Maxwell, …

A Study Of The Effect Of Developmental Kindergarten Placement On Student Achievement: Issues And Other Alternatives For The "Unready" Child, Sandra F. Earley

Dissertations

The purpose of this study was to determine the effect of developmental kindergarten placement beyond third grade and whether differences exist in levels of academic achievement between students who participated in developmental kindergarten and those who were recommended to attend but did not.

The target population of this study spanned 3 years and included 203 kindergarten eligible students in a suburban school district in mid- Michigan who were recommended to attend developmental kindergarten. The accessible population was 105 of the original 203 students.

The Michigan Educational Assessment Program (MEAP) reading and mathematics test mean scores were analyzed for both groups …

A Study Of The Correlation Between Per Pupil Funding And Student Achievement In The State Of Michigan, Douglas Harold Snyder

Dissertations

The purpose of this study was to investigate if a relationship existed between per pupil funding levels and achievement levels of students in the state of Michigan. The study sought to apply objective, systematic research techniques to a question which receives much emotional, unscientific discussion. To that end, the study asked the question whether a connection existed between student achievement as measured by Michigan Educational Assessment Program (MEAP) tests and the amount of per pupil funding in the student’s school district.

In an attempt to address these concerns this study examined two sets of variables. One set represented educational effectiveness …

The Relationship Of Teacher Attitudes Toward Evaluation And School Building Climate, Timothy James Lowe

Dissertations

Present management theory divides teacher evaluation into two categories, summative evaluation and formative evaluation. Summative evaluation is used for administrative decision making. Formative evaluation is used for shaping the performance of teachers. Traditionally, the evaluation process has been more summative than formative. Therefore, teachers have regarded evaluation with some apprehension.

In the 1960s, Halpin and Croft suggested that the climate of a school is analogous to its personality. School climate can be defined as the perception incumbents have of the organization. Degrees of climate can be organized along a continuum ranging from closed to open. A closed climate is characterized …

Semi-Strongly Regular Graphs And Generalized Cages, Cong Fan

Dissertations

Two well-known classes of graphs, strongly regular graphs and cages, have been studied extensively by many researchers for a long period of time. In this dissertation, we mainly deal with semi-strongly regular graphs, a class of graphs including all strongly regular graphs, and (r, g, t)-cages, a generalization of the usual cage concept.

Chapter I introduces the two new concepts: semi-strongly regular graphs and generalized (r, g, t)-cages, gives necessary conditions for the existence of semi-strongly regular graphs and some interesting properties regarding common neighbors of pairs of vertices, and shows connections between these two new concepts and the old …

An Analysis Of Local Response To State Initiated School Reform Legislation: Michigan Public Act 25, A. Bruce Watson

Dissertations

Educational reform has been a topic of interest to educators, politicians and tax payers for over a century. Michigan’s educational reform legislation, Public Act 25. enacted in 1990, is a shared-responsibility model where the state and local school district share responsibility for implementing four major educational reform components. These components are, core curriculum, annual educational report, school improvement planning and accreditation.

The study was designed to answer the following two research questions. Initially, do elementary principals in Michigan public elementary schools perceive educational reform indicators and conditions to be in enough strength to allow educational reform to continue under Public …

Learning Expectations And Learning From Problem Situations In Occupational Education, Michael Alexander Krischer

Dissertations

Employers have shown a growing interest in problem solving skill in addition to specific occupational skills (Carnevale, Gainer, and Meltzer, 1990). Learning expectations are defined as attitudes involving the self-conception of one's ability to respond to difficult situations, and learning from problem situations is defined as the ability to organize specialized knowledge so that it can be applied to a new situation. The purpose of the study was to examine relationships among these two variables and performance in a situation requiring the application of occupational knowledge under a novel set of conditions. The study was carried out at the Industrial …

Experimental And Numerical Determination Of Fluid Velocity Profiles And Turbulence Intensity In Mixing Vessels, Chun-Chiao Chou

Dissertations

In this study, both a laser-Doppler velocimeter (LDV) and a computational fluid dynamic (CFD) software package (FL UENI) were used to experimentally determine and numerically predict the velocity distribution of an unbaffled and a baffled mixing vessel. Two types of impellers were employed, namely a flat blade turbine (FBT) and a pitched blade turbine (PBT). These impellers were studied in a single-impeller or multiple-impeller configuration in the unbaffled and baffled vessels. The flow characteristics in the impeller regions were measured by LDV and used as boundary conditions in the numerical computation. Turbulence effects were numerically simulated using either the k-c …

A Petri-Net Based Methodology For Modeling, Simulation, And Control Of Flexible Manufacturing Systems, Venkatesh Kurapati

Dissertations

Global competition has made it necessary for manufacturers to introduce such advanced technologies as flexible and agile manufacturing, intelligent automation, and computer-integrated manufacturing. However, the application extent of these technologies varies from industry to industry and has met various degrees of success. One critical barrier leading to successful implementation of advanced manufacturing systems is the ever-increasing complexity in their modeling, analysis, simulation, and control. The purpose of this work is to introduce a set of Petri net-based tools and methods to address a variety of problems associated with the design and implementation of flexible manufacturing systems (FMSs). More specifically, this …

Section I: Thermodynamic Properties Of Hydrocarbon Radicals, Peroxy Hydrocarbon And Peroxy Chlorohydrocarbon Molecules And Radicals Section Ii: Kinetics And Reaction Mechanisms For : (1) Chloroform Pyrolysis And Oxidation (2) Benzene And Toluene Oxidation Under Atmospheric Conditions, Tsan-Horng Lay

Dissertations

Alkyl radicals are important active intermediates in gas phase photochemistry and combustion reaction systems. With the exception of a limited number of the most elementary radicals, accurate thermodynamic properties of alkyl radicals are either not available or only rough estimations exist. An H atom Bond Increment approach is developed and a data base [sic] is derived, for accurately estimating thermodynamic properties (ΔH_f°₂₉₈, S°₂₉₈ and Cp(T)) for generic classes of hydrocarbon radical species.

Reactions of alkyl radicals with molecular oxygen are one of the major reaction paths for these radicals in atmospheric photochemistry, oxidation of hydrocarbon …

Robust Approach To Object Recognition Through Fuzzy Clustering And Hough Transform Based Methods, Tianxiong Fu

Dissertations

Object detection from two dimensional intensity images as well as three dimensional range images is considered. The emphasis is on the robust detection of shapes such as cylinders, spheres, cones, and planar surfaces, typically found in mechanical and manufacturing engineering applications. Based on the analyses of different HT methods, a novel method, called the Fast Randomized Hough Transform (FRHT) is proposed. The key idea of FRHT is to divide the original image into multiple regions and apply random sampling method to map data points in the image space into the parameter space or feature space, then obtain the parameters of …

On Adaptive Code Division Multiple Access Detectors, Wenping Chen

Dissertations

Several variations of adaptive CDMA synchronous receiver schemes which can automatically adjust to the system parameters, are studied in this dissertation. Unlike their non-adaptive counterparts, these adaptive detectors require no knowledge of the received signals' energies and have similar or better performance.

Minimum energy and decorrelating criterion are used to update the weights. Since weights are updated according to the changes of the detector's outputs, hence no training sequence is required. The convergences of some of the aforementioned adaptive detectors are also disscussed.

The detectors proposed in this dissertation are near-far resistant,thus rendering the high-precision power control unnecessary. Among them, …