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Sense Of Humor As A Mediator Of The Effects Of Stress On Physical Health And Psychological Well-Being, Timothy Eugene Spruill

Dissertations

This paper explores the role of sense of humor as a mediator of the effects of stress on physical health and psychological well-being. One hundred subjects, selected from a population of hospital employees, were administered two measures of sense of humor. In addition, they completed a personal data form, and instruments assessing stressors, perceived stress, physical health and psychological well-being.

Results were evaluated using simple correlations and multiple regression analysis in order to determine whether or not knowledge of a subject's sense of humor enables prediction of their levels of physical health, psychological well-being and perceived stress. Analysis of the …

Factors Associated With Success In A Participative Decision Making Program For Supervisors, Managers, And Salaried Professionals, Eric Paul De Nijs

Dissertations

This study was designed to investigate the factors associated with success in a participative decision making program, based on the quality circle concept, involving teams of first-line supervisors, managers, and salaried professionals. The teams were formed to initiate and implement cost saving projects. A total of 35 subjects from six teams participated in the study conducted in a food processing company located in the Midwest. Cross-functional teams representing the main functional areas of a company were ranked on the basis of their success, defined as the proportion of the savings goal the team attained. From this ranking, the top three …

A Study Of Selected Strategies For Allocating Funds To Improve County Roads, Ronald E. Reid

Dissertations

Strategies for the ranking of county road improvement projects can be based on a rating that reflects the physical condition of the pavement, a rating that reflects the pavement roughness, a rating that incorporates the combination of physical condition of the pavement and the pavement roughness (its pavement serviceability rating), or a rating that takes into account the age of the pavement and amount of traffic

This study compared the relationship between the strategy of the ranking of each road segment based on that segment's: (a) surface distress rating and roughness rating, (b) surface distress rating and pavement serviceability rating, …

The Naturalistic Study Of Performance Feedback In A Higher Education Administrative Setting, Karen M. Reese

Dissertations

Examined in this study is the performance feedback provided to administrative staff at the research location and the relationship of that feedback to performance. Data were collected through semistructured interviews from 27 subjects at a small midwestern coeducational public university. Six research questions were investigated: the conditions under which feedback occurs, the sources of feedback and their relative usefulness, barriers to feedback giving and seeking, and the relationship of feedback to performance.

The desire to correct a deficiency was the primary catalyst to informal feedback being given to staff. Supervisors became aware of staffs' deficiencies through observation and complaints from …

Behavior Of High Strength Concrete And Slender Reinforced Concrete Columns With And Without Steel Fibers, Lin Showmay Hsu

Dissertations

A series of compression tests are conducted on 3 in. by 6 in. cylindrical specimens using a modified testing method that give the complete stress-strain behavior for both plain and fibrous high strength concretes with or without tie confinements. The volume fractions of fiber in the concrete are 0%, 0.5%, 0.75%, and 1.0%, respectively. Empirical equations are proposed herein to represent the complete stress-strain relationships of high strength and high strength fibrous concretes with compressive strength exceeding 10,000 psi. Various parameters are studied and their relationships are experimentally determined. The comparison between the experimental and analytical results shows to have …

Fabrication And Characterization Of Gated Silicon Field Emission Micro Triodes, Nanchou Liu

Dissertations

This dissertation describes the fabrication technology and characterization of a gated silicon field emission micro triode that is a novel electron tunneling device for generating electron emission into a vacuum. Conic (point) and wedge field emitter structures with nm-scale radii were fabricated in silicon and GaAs by etching, MOCVD and dry oxidation. A new self-aligned process was developed for fabrication of vertical field emission triodes. This process allows control of gate opening to less than 0.5 μm diameter without the need of electron-beam writing. It also provides a planar gate electrode and a thick dielectric layer for reduction of the …

The Influence Of Pore Fluids On Shear Strength And Stress-Strain Behavior Of Granular Soils, Prasanna Ratnaweera

Dissertations

When a dry granular soil is subjected to an external load, the stresses are transferred through mineral to mineral contacts. The shear strength of such a soil is governed by its contact properties. Presence of a thin layer of fluid between mineral to mineral contacts in a saturated soil will alter its contact properties. Therefore any change in the physical properties of pore fluid can logically be reasoned to influence the deformation characteristics of granular soils.

To investigate the influence of pore fluid viscosity on shear strength and stress-strain behavior of a soil, a series of consolidated drained triaxial tests …

Expert System For The Injection Molding Of Engineering Thermoplastics, Tzy-Cherng Jan

Dissertations

Injection molding of engineering thermoplastics is the most widely used manufacturing method in industry. It is a priority to maintain a deviation-free operating environment to ensure high quality, low cost manufacture. An expert system for the injection molding of engineering thermoplastics has been investigated. The system can be used to attenuate the deviations experienced during the injection molding of engineering thermoplastics. The system is coded in C programming language.

The resolution procedures of this system include two stages such as the definition of declarative knowledge and the procedure of corrective actions. In the definition of declarative knowledge, all of the …

A Study On Radical Scavenging And Magnetic Resonance Imaging Characteristics Of Stable Radical Nitroxides, Shiey-Shiun Horng

Dissertations

Several nitroxides have been prepared for study of their image enhancement capability. These nitroxides contain different nitroxyl moieties within one molecule. On MRI examination for the nitroxides prepared, TEMPO and HPTPO are better due to their better water solubility, even though some of the others have more nitroxyl centers available. The intensity response is linear with respect to concentration in the range studied in most of the cases except for HPTPO, whose intensity finally reaches maximum when its concentration is higher than 10 mM.

Three sources of biomass, namely, liver microsomes, whole-cell yeast and a bacterial activated sludge consortium, have …

Effects Of Western Education On Employees' Participation And Job Satisfaction In Saudi Arabian Industries, Abdulrahman Y. Al-Selaim

Dissertations

The purpose of this study was to investigate to what degree Western education and Saudi Arabian employees' degree of participation in quality circle programs influences their job satisfaction. These variables were investigated using a survey administered to 150 Saudi Arabian employees working in the production department of a Saudi Arabian company. The Questionnaire of Participation and Satisfaction (QPS) instrument that was used in this investigation is a 20-item questionnaire; items 1-13 were developed by the researcher, and items 14-20 were developed by Abbas (1985). The questionnaire consisted of three components designed to determine: where employees were educated, as well as …

The Effectiveness Of A Job Search Skills Training Program On The Job Readiness Of Undergraduate Malaysian Students Enrolled At Western Michigan University, Ibrahim Bin Hashim

Dissertations

The relevant body of research and literature applicable to this area emphasized the importance of job readiness among college students. Job seeking skills program can be rendered more effective and efficient by using a combination of several behavioral procedures.

The primary purpose of the study was to examine the effectiveness of a job search skills training program on the job readiness of the undergraduate sponsored Malaysian students enrolled at Western Michigan University. Specifically the problem centered on the ability of the treatment program to help Malaysian students to become clearer and to increase their understanding about the importance of self-awareness, …

Career Dynamics Of Counselor Trainee Stereotyping: Bias Toward Physical Ability, Social Class, Gender, And Race Of Clients, J. Stephen Neynaber

Dissertations

Three different attitude surveys, developed by the researcher, were administered to counselor trainees (N =200) at Western Michigan University: The Attitudes of Counselor Trainees (A.C.T.) Survey, Multicultural Beliefs Inhibiting Appropriate Support (M-B.I.A.S.) Survey, and Career Beliefs Inhibiting Appropriate Support (CB. LA.S.) Survey. A 24-item demographics questionnaire was administered to trainees (n =124) who completed the A.C.T. Survey. A six-items Likert scale produced significant effect (p < .05) on counselor trainees' ratings of clients' potential for career success: (1) Awareness of Personal Strengths and Weaknesses, (2) Goal Orientation, (3) Self-esteem, (4) Energy Level, (5) Participation in Extracurricular Activities, and (6) Level of Honesty.

Five client demographic oppression variables, which the review of literature documented to evince negative bias from counselors, were included in 16 hypothetical client scenarios: physical handicaps (viz., hearing impairment and paraplegia), female sex, African-Americans, low …

The Extent To Which The Career Guidance And Counseling Component Is Addressed In The Administration Of Tech Prep Programs, Linda Joan Kwasny

Dissertations

This study examined the career guidance and counseling component of tech prep projects that were being planned and implemented in Michigan during the 1990-91 school year. A survey was conducted of all eleven consortia operating funded tech prep projects to determine the involvement of secondary and post-secondary guidance professionals in tech prep planning, the extent of articulation of guidance services for regular and special populations tech prep students, and the nature and extent of the career guidance and counseling programs that were being planned for regular and special populations students.

The findings from this study indicate that for secondary and …

Investigation Of Waterjet-Workpiece Interaction, Hung-Yuan Li

Dissertations

The objective of this research is to develop new knowledge related to the fundamental physical phenomena of waterjet machining of ductile materials, and to use this knowledge to construct a numerical analysis model. The resulting knowledge will enable enhancement of waterjet cutting efficiency.

Experimental study of fundamental mechanisms and the acquisition of the data detailing micro and macro scale phenomena which occur during the machining process is carried out. It is shown that the material damage mechanism associated with waterjet machining is erosion cavitation which initiates ultrasonic stress wave propagation in the workpiece. Fatigue, an important element in producing material …

Development Of Prediction Technique For The Geometry Of The Abrasive Waterjet Generated Kerf, Yichung Chung

Dissertations

This study is concerned with the development of a practical and accurate technique for off-line determination of the variables characterizing the macro-geometry of the kerf generated in the course of abrasive waterjet (AWJ) machining of ductile materials. The study involved generation and processing of a database relating operational conditions with kerf dimensions. The total number of generated samples exceeded 1500.

A physical model relating the process results with operational conditions was constructed and used for the selection of a statistical technique for analysis of the acquired experimental information. The semiempirical model developed here is based on a simple theoretical model …

Kinetic Studies Of Photo-Initiated Oxidation Of Toxic Organic Pollutants Including The Formation And The Destruction Of Intermediates, Yuan-Shen Li

Dissertations

The photo-initiated oxidation process, using hydrogen peroxide or ozone under ultraviolet radiation, has been proven to be an effective treatment method for toxic organic pollutants in wastewater. Most of the recent kinetic studies of the process were concentrated on the breakdown mechanisms of the pollutant itself. The formation and the destruction of intermediates were seldom investigated. Also the mechanisms and their reaction rate constants of free radical formation and destruction in the O₃/UV or H₂O₂/UV reactor were seldom studied.

The objective of this research is to study the kinetics of photo-initiated oxidation of toxic …

Performance Evaluation Of Spread Spectrum System With Cochannel Interference Through A Nonlinear Channel, Yong H. Kim

Dissertations

This thesis deals with the problem of more than one subscriber transmitting data signals through a common satellite repeater using code division multiplexing to separate the signals. We are concerned with the problem of amplifying two DS spread spectrum signals, both QPSK or BPSK modulated, in a common device in which limiting occurs. One signal is considered the signal we desire to receive, and the other, having the same nominal carrier frequency with a small random offset, is considered to be a cochannel interferer. The case of a cochannel interferer on the uplink and downlink in QPSK signalling and BPSK …

Particle Dynamics Modeling Of Boundary Effects In Granular Couette Flow, Hyeong-Jin Kim

Dissertations

This study provides insights in understanding boundary effects on the flow of dry granular materials composed of identical, smooth, inelastic spheres between parallel, bumpy walls in the absence of gravity. The results of this study are useful in providing a basis upon which developing theories can be modified as well as substantiating previous and current experiments. This in turn has a major importance in many industries which are concerned with handling of particulates, such as coal, mineral processing, powder metallurgy, and agriculture.

The particle dynamics or discrete element method is used to model this flow, thereby providing a means of …

Structural Reliability Using Finite Element Method, Che-Chen Liou

Dissertations

During the last decade, structural reliability theory has been treated in a large number of research papers; therefore, from being a subject only well known by a relatively small number of researchers, it has become an important engineering discipline. From the application point of view, many practical applications have been made successfully.

In this dissertation some important fundamental concepts in statistics and in reliability theory are presented. The concept of failure mode can be defined as: A set of failed elements turn a structure into a mechanism. Usually, a structure has many possible failure modes; therefore, it will be necessary …

A Modified Approach To Flood Prediction In Urban Watersheds, Joseph Ofungwu

Dissertations

The purpose of this dissertation was to develop a better method for dealing with the problems of flood prediction in Urban Watersheds. It has long been realized that urbanization activity such as increased imperviousness, drainage improvements, etc. increases runoff volumes. Therefore, traditional flood prediction methods using the Log Pearson III distribution underestimate flood frequencies when applied to urban watersheds without modification.

In attempt to compensate for the effects of urbanization on streamflow, previous workers usually employed regional analysis techniques involving a number of different watersheds at various degrees of urbanization. Results obtained by this approach leave room for improvement primarily …

Process Technology And Characterization For Field Emission Devices, Jong Min Kim

Dissertations

Vacuum microelectronics is a new research field which applies semiconductor process technology to the fabrication of micron-dimensioned electron devices. Vacuum microelectronics is made possible by advances in microstructures and nanofabrication technology. Vacuum microelectronic devices are further characterized by a wide operating temperature range, nuclear radiation immunity, higher emission current density potential, and lower power consumption than that of thermionic emitters. The low mass of the electron provides a higher carrier mobility than GaAs or any solid state device. These features offer the potentials for wide variety of applications.

In this dissertation. electron field emission structures applicable to a variety of …

Investigation Of Epitaxial Lift-Off Gaas And Langmuir-Blodgett Films For Optoelectronic Device Applications, Divyang M. Shah

Dissertations

Epitaxial lift-off (ELO), a technique of removing an epitaxially grown GaAs layer from its growth substrate by selective etching of an AlAs sacrificial layer, is described for field-effect transistor fabrication independent of the GaAs growth substrate. Metal Semiconductor Field-Effect Transistors (MESFETs) and High Electron Mobility Transistors (HEMTs) fabricated on silicon and sapphire substrates using ELO are investigated. A 0.1 μm gate length depletion mode MESFET made on silicon exhibited a unity current gain frequency f_t = 34 GHz. Excellent device isolation with subpicoampere leakage currents is obtained. A high input impedance amplifier has been implemented on silicon substrate using …

Thermal Desorption And Decomposition Of Hazardous Organic Compound I: Mass Transfer Of Benzene And Chlorobenzene In Soil Matrices Ii: Oxidation And Pyrolysis Of 1,1,1-Trichloroethane In Methane/Oxygen/Argon, Yo-Ping Wu

Dissertations

I: Mass Transfer of Benzene and Chlorobenzene in Soil Matrices

Experimental measurements on several apparatus were used in conjunction with chromatographic theory to study the thermal adsorption and desorption of organic vapors on soil with different particle sizes for analysis mass transfer parameters and heat of adsorption. Benzene (C₆H₆) and chlorobenzene (C₆H₅Cl) were tested on soil with 0.55, 0.46, 0.36, and 0.225 mm average particle sizes. Sample injection volumes for organic compounds were studied to ensure linearity of gas chromatography. Equilibrium constants were strongly dependent on temperature but not on particle size. …

Leadership In Policy Issue Networks: The New Community College Of Baltimore, Helen H. Bishop Edd

Dissertations

The policy-making process is a complex human endeavor characterized by interactions among leaders and followers who do leadership by placing policy innovations on the political agenda and utilizing their resources to attempt change. If innovative change is accomplished, then the new policy must be implemented at the local level, in ways which may or may not reflect the intentions of those who desired the change, or those who created the new policy. This research focuses on an example of policy making in state government in the area of postsecondary education. The objectives of the study were to determine how coalitions …

A Comparison Of Four Methods To Teach Complex Verbal Concepts Using A Computer-Assisted Instruction Program, John Byron Connors

Dissertations

This study compared four instructional programs which taught terminology in behavioral psychology using computer-assisted instruction (CAD with college students. The independent variable was the type of instruction presented by one of four CAI programs: (a) Rules Only, (b) Rules Plus Positive Examples, (c) Rules Plus Negative Examples, and (d) Rules Plus Positive and Negative Examples. The dependent variables were the: (a) pretest scores, (b) posttest scores, (c) 1-week delayed posttest scores, and (d) preference questionnaire scores. Using the pretest as a covariate, results approached significance (p=.07) on posttest scores only for the Rules Only and Rules Plus Positive Examples over …

Job Aids, Feedback, And The Teaching Of Verbal-Reasoning, Angela Williams Campbell

Dissertations

The purpose of this study was twofold: (1) to test the effects of a job aid and feedback on learning to solve directional verbal-reasoning problems, and (2) to examine whether students’ skills transferred to similar problems following the removal of both the job aid and feedback. Some previous researchers who studied problem solving utilized the think-aloud technique and used solutions generated by expert problem solvers. The think-aloud technique, although perhaps a good one, is not practical in the classroom. In the main study, a job aid was incorporated within the problem so students would be able to use guidance toward …

Spatial Visualization And Leadership In Teaching Multiview Orthographic Projection: An Alternative To The Glass Box, Mark A. Curtis

Dissertations

The purpose of this study was to compare the effectiveness of using one instructional method versus another in teaching multi view orthographic projection to college students possessing varied spatial visualization abilities. Two instructional methods were used: (1) the traditional hinged glass box method and (2) an unconventional method in which an object is placed in the middle of a bowl/ hemispheric shape where the front view of the object is seen by looking directly into the bowl. Other views are developed by sliding the object along the surface of the bowl until they are at right angle to the viewer's …

The Psychological Typologies And Leadership Behaviors Of First-Line Supervisors In A Large Automotive Company, James Joseph Conlen

Dissertations

The purpose of this study was to examine the psychological typologies and leadership behaviors related to participative management of first-line supervisors in a plant of a large automotive company. The Myers-Briggs Type Indicator (MBTI, Myers & McCaulley, 1985) was used as a measure of psychological typologies. The Group Environment Scale (GES, Moos, 1974) was used as a measure of leadership behaviors. The population was 113 first-line supervisors; complete data were obtained for 76 supervisors (67%).

Hypotheses were formulated upon the expectation that GES mean scores would differ depending upon MBTI personality type. Twelve directional hypotheses were investigated using four MBTI …

The Relationship Between Cooperative Education And Other Criteria In Attractiveness For Hiring, Carl B. Wagner

Dissertations

This study examined the perceptions of employers who belong to the Midwest College Placement Association and actively recruit graduates from Midwestern colleges and universities. Their attitudes on hiring criteria and kinds of work experience which influence the decision to hire were surveyed using an equal-appearing interval scale. The data collected were disaggregated according to the academic majors of the graduates hired using a chi-square analysis and t tests. The validity of the instrument developed by a team of experts was tested with a pilot survey to determine mean and modal scores of each item to establish which items should be …

Improving The Throughput Of Plasticating Extruders : Manufacture Of Non-Circular Pellets, Measurement Of Their Interparticulate Friction Coefficient, And Implications For Screw Design, Chia-Ying Liu

Dissertations

This dissertation addresses the hypothesis that the interparticulate friction coefficient of a bed of polymeric particulates is a function of the cross-section of the pellets. Most pellets have a circular cross-section especially those that are strand cut. But when such pellets constitute a particulate bed there are few restrictions to adjacent pellets turning with respect to each other, or of the beds rupturing under shear load. This rupture can occur in plasticating extrusion, and it results in a poorly mixed melt with an inhomogeneous temperature distribution. The temperature fluctuations cause viscosity fluctuations which in turn cause pressure fluctuations. The pressure …