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Three-Dimensional Color: Development Of A Machine Vision Colorimeter., William K. Preece Jan 1994

Three-Dimensional Color: Development Of A Machine Vision Colorimeter., William K. Preece

Graduate Theses, Dissertations, and Problem Reports (ETD)

This document proposes a patent pending process, called 3D COLOR, to measure color and appearance of three-dimensional (3D), non-specifically oriented objects with a 24 bit color machine vision system. The core technology of 3D COLOR encompasses image correction and shading correction. A methodology is developed and implemented for improving image fidelity by calibrating and removing camera, illumination, and optical influences from the image. Techniques for removing the shape induced shading from the image data of a three-dimensional object are explored. This facilitates large region analysis of color and appearance for finished products and on-line color monitoring for nonplanar web processes …

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Enhanced Heat Transfer In A Cylindrical Cavity With Periodically Perturbed Annular Flames., Robert Allen Roach Jan 1994

Enhanced Heat Transfer In A Cylindrical Cavity With Periodically Perturbed Annular Flames., Robert Allen Roach

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this investigation was to experimentally examine the enhanced heat transfer and emission reduction characteristics of periodically perturbed annular natural gas flames issuing into a cylindrical cavity. Perturbation modes for the fluidic nozzles included the use of steady, axially oscillating, and radially oscillating annular flames. The testing process involved two phases. Phase one quantified the instantaneous and time averaged heat fluxes and the amount of NOx production from the natural gas flames. For the three nozzle diameters (19 mm, 25.4 mm, and 38.1 mm) tested, the equivalence ratios ranged from 0.6 to 1.0, the pulsation frequencies from steady …

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Measurement And Prediction Of Temperature Histories For Single Coal Particles Prior To And During Devolatilization., Ramanathan Sampath Jan 1994

Measurement And Prediction Of Temperature Histories For Single Coal Particles Prior To And During Devolatilization., Ramanathan Sampath

Graduate Theses, Dissertations, and Problem Reports (ETD)

The measurement and prediction of the devolatilization temperature histories of bituminous coal particles (of size 106-125 {dollar}\\mu\\rm m){dollar} are carried out for a range of heating intensities. Single particles were isolated in an electrodynamic balance and their three-dimensional external surface areas, volumes, and densities were measured using rapid optical methods. The particles were then irradiated with a pulsed Nd:YAG laser beam of equal intensity from opposite sides. Devolatilization temperature transients during heating and cooling (after the laser pulse was terminated) were measured using a single-color pyrometer. Truncated pulse-widths were also employed to heat and cool some particles prior to devolatilization. …

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A Biological System For The Dissolution Of Insoluble Phosphate Ores: 2-Ketogluconate Increases The Solubility Of Soil Phosphates., Joanne Marie Scalzitti Jan 1994

A Biological System For The Dissolution Of Insoluble Phosphate Ores: 2-Ketogluconate Increases The Solubility Of Soil Phosphates., Joanne Marie Scalzitti

Graduate Theses, Dissertations, and Problem Reports (ETD)

The following investigation examined a biological system employing bacterially-derived 2-ketogluconate (2KG) for the dissolution of insoluble soil phosphates. It has been suggested that 2KG solubilizes insoluble soil phosphates by either a reduction in soil pH or by chelating divalent cations. The capability of 2KG derived from Pseudomonas aeruginosa PAO1 to solubilize phosphate ores and the mechanism by which this dissolution occurs were investigated in vitro and in vivo. The dissolution of all three ores was shown to be dose-dependent, non-linear, and not correlated with a significant reduction in pH of the solution. The dissolution of IP and RP resulted in …

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Characterizing Interfacial Adhesion Between Wood Fibers And A Thermoplastic Matrix., Feipeng P. Liu Jan 1994

Characterizing Interfacial Adhesion Between Wood Fibers And A Thermoplastic Matrix., Feipeng P. Liu

Graduate Theses, Dissertations, and Problem Reports (ETD)

Interfacial adhesion across the fiber/matrix interface plays a critical role in controlling the performance of reinforced wood fiber and thermoplastic composites. In this study, the surfaces of cellulosic (rayon, cotton, and wood) fibers were chemically modified with acetic anhydride and styrene-maleic anhydride copolymers, producing different and controlled fiber surface morphologies and chemical functionalities. A specific emphasis was given to the modification to wood fiber surfaces. Dynamic contact angle (DCA) analysis and a microbond test were used to determine the fiber surface free energy and the acid/base interaction and evaluate the interfacial shear strength (ISS) between modified wood fibers and a …

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A Case For Writing To Learn In The Engineering Curriculum., Sati Maharaj Jan 1994

A Case For Writing To Learn In The Engineering Curriculum., Sati Maharaj

Graduate Theses, Dissertations, and Problem Reports (ETD)

The focus of this study is the integration of writing to learn in a foundation engineering course, Statics (MAE 41), at West Virginia University. The major purpose was to attempt to determine whether the integration of writing in this course fostered students' learning of the content. Two secondary areas of examination were: (i) students' attitudes toward the writing to learn strategies, and (ii) students' expectations of these writing activities. The study consisted of students enrolled in an MAE 41 (mechanical and aerospace engineering) course at WVU, ranging from sophomores to seniors. Students were not necessarily only MAE majors; they represented …

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Selected Aspects Of Automation And Implications For Post-Secondary Technology Education., Mark Edward Bronakowski Jan 1994

Selected Aspects Of Automation And Implications For Post-Secondary Technology Education., Mark Edward Bronakowski

Graduate Theses, Dissertations, and Problem Reports (ETD)

The primary purposes of this study were to (1) develop a rank-ordered listing of concepts, ideas, equipment, systems, and techniques pertaining to the broad aspects of automation recommended for post-secondary technology education programs, and (2) draw implications for post-secondary education curriculum based on the outcomes of the Delphi. The study consisted of a three-round Delphi with a panel of twenty manufacturing professionals at a supervisory or higher level and with automation experience. A different and smaller group was used to develop the initial list of 35 items that the panel responded to in Round One. Panelists accepted, rejected, modified, or …

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A Theoretical And Experimental Investigation Of Spouted Beds With Draft Tubes., Mao Xu Jan 1994

A Theoretical And Experimental Investigation Of Spouted Beds With Draft Tubes., Mao Xu

Graduate Theses, Dissertations, and Problem Reports (ETD)

A spouted bed with a draft tube insert and separate gas supplies into the annular region and central core at the bottom of the bed was built. The influence of the central gas feed flow rates, annular gas feed flow rate, and the bottom gap height on the solids circulation rate, gas bypassing rate through the bottom gap beneath the draft tube, and pressure drop across the bed were investigated. The experimental results show that within the experimental range: (1) an increase in the central gas feed flow rate increases the solids circulation rate and gas bypassing flow rate from …

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The Effects Of Power On Faculty Senate Involvement., Norma L. Winter Jan 1994

The Effects Of Power On Faculty Senate Involvement., Norma L. Winter

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study was designed to answer the question: are the power and influence behaviors of high school principals in West Virginia correlated with decision-making involvement of faculty senates? Data were collected in two phases. Phase 1 data resulted from surveys sent to two populations: (a) 108 respondent principals were asked to indicate their self-perceived power base utilization, and (b) 96 faculty senate chairpersons were asked to rate the decision-making involvement of their faculty senates. Phase 2 data, which was designed to confirm, amplify, or repudiate phase 1 findings, resulted from interviews and power structure analyses at three high schools representing …

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Compatibility Of Submicron Silicon Cmos Circuits With Gallium Arsenide-On-Silicon Heteroepitaxy., Hormuzdiar E. Nariman Jan 1994

Compatibility Of Submicron Silicon Cmos Circuits With Gallium Arsenide-On-Silicon Heteroepitaxy., Hormuzdiar E. Nariman

Graduate Theses, Dissertations, and Problem Reports (ETD)

Advanced packaging and high density interconnections are emerging technologies as silicon MOS device dimensions scale down to minimum physical limits. Multi-chip Modules and Wafer Scale Integration improve packing density, and provide solutions to board area issues beyond the capabilities of even the most densely packed surface mount technologies. Such technologies could confront increasingly complex interconnection constraints, and might provide opportunities for the insertion of high performance optical interconnections into future microelectronic systems. However, successful integration of optics with microelectronic system technologies requires a careful evaluation of the practical issues confronting monolithic co-integration of GaAs optoelectronics with high performance silicon CMOS …

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Modeling, Simulation And Response Analysis Of Antilock Braking Systems., Sudhanshu Nigam Jan 1994

Modeling, Simulation And Response Analysis Of Antilock Braking Systems., Sudhanshu Nigam

Graduate Theses, Dissertations, and Problem Reports (ETD)

Two problems faced by the brake industries today are: (1) Longer development time because of the design approach that uses actual physical tests to evaluate and caliberat design for a specific brake and vehicle system. (2) Incapability of the ABS (Antilock Braking Systems) to optimally achieve the functional requirements of stopping distance, steerability, and stability under the wide variety of road and driving conditions that are encountered. The two problems stated above are addressed in this dissertation. A computer model is developed for brake and vehicle. Using the model analytical simulations instead of actual physical tests are performed. Simulation is …

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Long-Term Underground Mining Sequence Planning Using Dynamic Programming., Mohammad S. Al-Juhani Jan 1994

Long-Term Underground Mining Sequence Planning Using Dynamic Programming., Mohammad S. Al-Juhani

Graduate Theses, Dissertations, and Problem Reports (ETD)

One of the most important aspects in the long-term planning of an underground mine is the decision on production scheduling, (the long-term mining sequence planning); that is the order in which parts of the seam should be mined given a specified number of operating units. An optimal mining sequence of the combined operating units would lead to the best possible net present value (NPV) for a mining company. Moreover, a non-optimal mining sequence could cause undesirable cash flows in early years which could cause the economic failure of the mine. Therefore, a planning procedure coupled with dynamic programming model (DP …

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Errors In Sampling Particulate Flows With A 10-Mm Dorr-Oliver Cyclone Separator., Krishnendu Kar Jan 1994

Errors In Sampling Particulate Flows With A 10-Mm Dorr-Oliver Cyclone Separator., Krishnendu Kar

Graduate Theses, Dissertations, and Problem Reports (ETD)

In this work, the efficiency of an isolated and mannequin-mounted 10mm Dorr-Oliver nylon cyclone as a particle preclassifier for respirable dust sampling was experimentally determined relative to an isokinetic sampler (sampling efficiency) and an inlet simulator sampler (penetration). A TSI Aerodynamic Particle Sizer (APS 3310) and a Marple six-stage impactor at different stream velocities (1.52 m/s, 2.43 m/s, 4.15 m/s), sampling flow rates (2.0 lpm, 1.7 lpm, 1.2 lpm) and inlet orientations {dollar}(0\\sp\\circ,\\ 90\\sp\\circ,\\ 180\\sp\\circ{dollar}) relative to the free stream was used. The Sigmoid curve has been found to represent the efficiency (penetration and sampling efficiency) of the cyclone fairly …

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Fracture Behavior Of Notched Continuous Fiber Boron/Aluminum Metal Matrix Composite., Fu-Ken Hsieh Jan 1994

Fracture Behavior Of Notched Continuous Fiber Boron/Aluminum Metal Matrix Composite., Fu-Ken Hsieh

Graduate Theses, Dissertations, and Problem Reports (ETD)

One of the most useful attribute of reinforced fibrous composites is its ability to retard crack propagation and thereby improve its overall fracture resistance. Research on the fracture behavior of continuous fiber reinforced metal matrix composites (MMC's) is critical to assessing important engineering properties such as fatigue, impact resistance, creep and durability. The mechanism of interfacial fiber/matrix sliding and debonding in a notched fiber reinforced composite and the corresponding increasing of the overall fracture toughness have been studied in recent years. However, to the best of our knowledge, no direct in-situ experimental measurement of the interfacial sliding and debonding processes …

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Damage Criteria And Control Measures For Residential Houses Subjected To Longwall Subsidence., Deepak Dutta Jan 1993

Damage Criteria And Control Measures For Residential Houses Subjected To Longwall Subsidence., Deepak Dutta

Graduate Theses, Dissertations, and Problem Reports (ETD)

With the increase in production coming from longwall mining, attendant subsidence on the surface is becoming planned but widespread. As a consequence, in the rural USA, residential houses, farmers' barns, grain silos, county roads, small bridges, streams, grazing ground, underground water, pipe lines, and electric transmission towers are subjected to ground subsidence. Out of these structures and renewable resources, disturbances to residential houses caused by longwall mining are becoming a vexing problem for mine operators and house owners. In the backdrop of the above scenario, this dissertation explores two aspects of the issue, i.e. evaluation of damage to residential houses …

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Mine Ventilation Network Optimization Using Nonlinear Programming Techniques., Changhong Huang Jan 1993

Mine Ventilation Network Optimization Using Nonlinear Programming Techniques., Changhong Huang

Graduate Theses, Dissertations, and Problem Reports (ETD)

Mine ventilation, though costly, has to be maintained for any underground coal mine for the sake of miners' safety and health. Higher productivity and more stringent environmental standards require greater quantities of air at the underground working faces. These conditions have brought a great increase in the costs of mining. To survive in the current state of market competition for the mining industry, more concerns have to be addressed on developing a ventilation system which is functionally effective and reliable, and yet economically efficient. Mine ventilation network optimization is one of the approaches to reach that objective. This dissertation is …

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Autoignition Of Low-Heating Value Gases In A Direct-Injected Diesel Engine., Carlos Emilio Romero Jan 1993

Autoignition Of Low-Heating Value Gases In A Direct-Injected Diesel Engine., Carlos Emilio Romero

Graduate Theses, Dissertations, and Problem Reports (ETD)

The autoignition of gaseous mixtures representative of coal-derived low-heating-value gaseous fuels in a direct injected diesel engine was investigated theoretically over pressure and temperature ranges of 10 to 50 atm and 800 to 1000 K respectively. A computer model was validated with experimental engine data operated on direct injected synthetic coal gas by Caterpillar, Inc. The computed results demonstrated the importance of the characteristic time associated with the chemical kinetics when compared to fluid dynamics mixing. High gas temperatures resulting from high compression ratios, high boost, high inlet air temperature or other ignition aids are needed to ignite these gases …

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Singular Systems: Structure, Algorithm, And Application., Jianming She Jan 1993

Singular Systems: Structure, Algorithm, And Application., Jianming She

Graduate Theses, Dissertations, and Problem Reports (ETD)

From engineering point of view, a complete accomplishment should be supported by rigorous mathematical analyses, feasible computational algorithms, and concrete practical applications. The research work of this dissertation is done with an attempt of trying to approach this principle and to understand some basic facts of singular systems in these three aspects. In Part I, a new complementary solution formulation is derived from both the time domain and the frequency domain for singular systems. The solution expressions of regular systems and singular systems are unified. Further, the dynamic characteristics of singular systems are studied. We discussed in detail on the …

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Policy Decision-Making In The United States Of America And The People's Republic Of China: The Development Of National Goals For Public Education., Bangyong Su Jan 1993

Policy Decision-Making In The United States Of America And The People's Republic Of China: The Development Of National Goals For Public Education., Bangyong Su

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study is involved in policy decision making in USA and PRC with respect to the development of national goals for public education, and deals with the following two perspectives: (1) Investigate the policy decision making process and the national education goals developed in USA. (2) Investigate the policy decision making process and the national education goals developed in PRC. This study adopts analytical and descriptive methodology including documentation review and observation. The researcher conducted computer searches through Education Research Information Center (ERIC), Public Affairs Information Service (PAIS) International, Dissertation Abstract International, Social Science Search, Sociological Abstract, and all the …

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The Academic Adjustment Of International Students By Country Of Origin At A Land Grant University In The United States., Georgine Konyu-Fogel Jan 1993

The Academic Adjustment Of International Students By Country Of Origin At A Land Grant University In The United States., Georgine Konyu-Fogel

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of the study was to compare and contrast international students attending West Virginia University by country of origin to examine their academic success and academic adjustment at West Virginia University. Data were collected by a mail survey, contacting 622 international students from India, Japan, Korea, People's Republic of China, Republic of China (Taiwan), and Spain (countries with the largest number of enrollment at West Virginia University during academic year 1992-93). From 552 actual contacts, 290 responses were collected (52.5% response rate). Treatment of data included descriptive and inferential statistics. Cronbach coefficient alphas and Pearson correlation matrix were computed …

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Paul Green, Symphonic Drama, And Popular Culture., Carolyn Craft Leech Jan 1993

Paul Green, Symphonic Drama, And Popular Culture., Carolyn Craft Leech

Graduate Theses, Dissertations, and Problem Reports (ETD)

Paul Green's symphonic dramas represent a collective memory for and a challenge to American popular culture. Green's artistic insight and dramatic innovation allowed him to applaud that culture and to inform it as he lauded past values of individual vision, courage, and hard work and urged compassionate confirmation of individual dignity. Green recorded features of mass culture, beginning with the people of his own North Carolina origin and eventually embracing the expanse of his country's geography and history. Green celebrated and defended the common man, and he created his literary works (especially his symphonic dramas) to cater to the tastes …

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The Relationship Between Self-Perceived Psychological Types Of Male And Female Community College Deans Of Instruction And Their Self-Perceived Leadership Styles., Joan Carol Henry-Lucas Jan 1993

The Relationship Between Self-Perceived Psychological Types Of Male And Female Community College Deans Of Instruction And Their Self-Perceived Leadership Styles., Joan Carol Henry-Lucas

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study was designed to examine the relationship between the self-perceived psychological types of male and female community college deans of instruction and their self-perceived leadership styles. The population consisted of 881 male (N = 667) and female (N = 204) community college deans of instruction identified by mailing labels from the American Association of Community and Junior Colleges who were serving in public institutions in the United States listed in the AACJC Membership Directory 1992. A proportional, stratified, random sample was conducted of 267 subjects--205 male deans and 62 female deans. A cover letter, demographic survey, the Leadership Behavior …

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Engineering And Economic Risk Assessment For Longwall Coal Mining Systems., Stephen L. Bessinger Jan 1993

Engineering And Economic Risk Assessment For Longwall Coal Mining Systems., Stephen L. Bessinger

Graduate Theses, Dissertations, and Problem Reports (ETD)

As the longwall mining method enjoys increasing success in a wide variety of coal seams around the world, new operators acquire their first longwall faces at an increasing rate. The large economic investment associated with this acquisition decision, approaching {dollar}16,000,000 USD in some cases, is cause for hesitation to many corporations' officers. This reluctance is based on not only the magnitude of the investment, but the lack of information about the possible and likely project outcome. The poor assessment of project risk which results from uncertainty in various project parameters is a severe impediment to rational decision making. To address …

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Formulation And Implementation Of A Large-Scale Work Scheduling Algorithm For Underground Coal Mines., Shiquan Yuan Jan 1992

Formulation And Implementation Of A Large-Scale Work Scheduling Algorithm For Underground Coal Mines., Shiquan Yuan

Graduate Theses, Dissertations, and Problem Reports (ETD)

The assignment of available workers to prioritized jobs on a shift basis is one of the most important and difficult decisions for the managers of underground coal mines. The objective of this study was to develop a work scheduling algorithm to handle the worker assignment problem in an efficient and practical way. The study basically consisted of three parts. The first part concerned the development of a mathematical programming model to handle the worker assignment problem. A goal programming model was developed first, and was converted a zero-one linear programming model which allows more flexibility in coping with various situations …

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Mathematical Modeling On The Role Of Thiobacillus Ferrooxidans In The Formation Of Acid Mine Drainage., Kareem Issa Batarseh Jan 1992

Mathematical Modeling On The Role Of Thiobacillus Ferrooxidans In The Formation Of Acid Mine Drainage., Kareem Issa Batarseh

Graduate Theses, Dissertations, and Problem Reports (ETD)

Experimental results are reported on the biological atmospheric oxidation of FeS{dollar}\\sb2{dollar} embedded within mine rocks in the presence of Thiobacillus ferrooxidans. Three different potentially acid-producing rock samples from different coal seams are used. The rate of FeS{dollar}\\sb2{dollar} conversion or production of acid is studied with respect to sterility and variations in temperature, and particle size. Pore size distributions as well as changes in porosity with conversion have been determined for both inoculated and sterilized samples. It is found, under the same experimental conditions, that the inoculated samples produce five times more acid than the sterilized ones. This is attributed to …

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A Comparison Of The Stad And Jigsaw Cooperative Learning Methods In A College-Level Microcomputer Applications Course., Nina Zetty Jan 1992

A Comparison Of The Stad And Jigsaw Cooperative Learning Methods In A College-Level Microcomputer Applications Course., Nina Zetty

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study examined the effects of two cooperative learning methods on the achievement, computer anxiety, and classroom environmental preferences (whole class, small cooperative groups, or individualized) of college-level students in two microcomputer applications classes. One group received instruction using the Student Teams Achievement Division (STAD) method (n = 26), while the other group was taught using the Jigsaw method (n = 27); both groups were taught for one semester (15-weeks) by the same instructor. Although both cooperative groups reported statistically significant achievement gains for each application, the Jigsaw group scored significantly higher than the STAD group with the DOS {dollar}(F(1, …

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The Relationship Between Food Aid And Food Production In Sub-Saharan Africa., Saba Momodou Jallow Jan 1992

The Relationship Between Food Aid And Food Production In Sub-Saharan Africa., Saba Momodou Jallow

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this research was to examine the relationship between food aid and food production in thirty-six Sub-Saharan African countries over an eleven year period. Local food production was used as a dependent variable in a pooled cross sectional time series statistical model with food aid, GNP per capita, population, urbanization, literacy rates, regime type, and rainfall used as explanatory variables. The statistical model was supplemented with four cases pertaining to agricultural food policies and politics in Botswana, Ivory Coast, Kenya and Zimbabwe. Both internal and external constraints have contributed to the food crisis in Sub-Saharan Africa. The relationship …

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Performance Analysis Of A Wave Pump Without Any Moving Parts Coming Into Contact With The Liquid., Syed Salman Khalid Jan 1992

Performance Analysis Of A Wave Pump Without Any Moving Parts Coming Into Contact With The Liquid., Syed Salman Khalid

Graduate Theses, Dissertations, and Problem Reports (ETD)

This paper describes a novel liquid pump which operates by wave action on the free surface. The wave action can be imposed by means of a piston or pneumatically moving fluid in contact with the liquid. This is of particular concern with hostile fluids such as molten metals, chemically corrosive or explosive liquids, or biologically shear stress sensitive fluids such as blood. The object of this research is to determine the theoretical performance of such a pump. Its mass flow rate depends on various parameters such as: wave tank surface area, wave amplitude inside the wave tank, frequency of oscillation, …

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Deterministic And Probabilistic Analysis Of The Safety Of Coal Refuse Disposal Facilities., Shi-Chieh Jonathan Cheng Jan 1992

Deterministic And Probabilistic Analysis Of The Safety Of Coal Refuse Disposal Facilities., Shi-Chieh Jonathan Cheng

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study is to develop a probabilistic technique in evaluating the stability of coal refuse disposal facilities. A review of coal refuse disposal and the variability associated with coal refuse have been presented. The causes of variability both in soil and coal refuse were discussed in detail, and the extent of variability of coal refuse properties were studied. A probabilistic approach named PEM was incorporated to determine the reliability and assess the probability of low factor of safety of coal refuse disposal facilities. A computer model based on the Simplified Bishop Method and PEM principles had been …

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Coanda Effect Jet Around A Cylinder With An Interacting Adjacent Surface., Randolph Allen Churchill Jan 1992

Coanda Effect Jet Around A Cylinder With An Interacting Adjacent Surface., Randolph Allen Churchill

Graduate Theses, Dissertations, and Problem Reports (ETD)

The effects of placing a plane solid surface in close proximity to a Coanda effect jet turning over a cylindrical surface are investigated to help judge the possible application of this type of jet to manufacturing line processes. The Coanda jet is proposed as a coating control mechanism for fluidic coatings on sheets or a particulate removal device. A Coanda jet placed close to a surface will develop a strong tangential flow that will shear by viscous effects and pressure gradients. A turbulent k-{dollar}\\varepsilon{dollar} finite element model, developed in FIDAP, is presented that studies the effects of cylinder-sheet separation distance …

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