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Space-Time Block Coding With Imperfect Channel Estimates, Dirk Alan Baker May 2001

Space-Time Block Coding With Imperfect Channel Estimates, Dirk Alan Baker

Graduate Theses, Dissertations, and Problem Reports (ETD)

Space-time block coding (STBC) is a method that combines diversity and coding without a corresponding increase in bandwidth and with minimal complexity in the receiver. The performance of STBC with perfect channel state information (CSI) being available at the receiver has been shown to provide approximately 10 dB of improvement over uncoded transmission in Rayleigh fading when using Quadrature Phase Shift Keying (QPSK) at a bit error rate of 10 -3. In this thesis, the performance of space-time block codes is analyzed when the receiver must rely on noisy, or imperfect, estimates of the channel. It is shown that for …

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Processing And Characterization Of Contacts On Mbe-Grown Gallium Nitride, Carlo Requiao Da Cunha May 2001

Processing And Characterization Of Contacts On Mbe-Grown Gallium Nitride, Carlo Requiao Da Cunha

Graduate Theses, Dissertations, and Problem Reports (ETD)

Gallium nitride, a III-V compound semiconductor, is a good candidate for applications such as blue laser diodes and power devices due to its wide bandgap. One of the main challenges related to this compound is the growth of high quality crystals. If crystals with high level of purity are grown, the carrier concentration is therefore low, and the resulting high resistivity of the bulk imposes some difficulties for capacitance-related measurements. This thesis deals with the problem of processing and characterization of contacts on highly resistive materials such as unintentionally doped n-type gallium nitride. The ideal electrical model of a depletion …

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Analyses Of Coal Extraction And Spoil Handling Techniques In Mountainous Areas, Shiva Prasad B. Kolli May 2001

Analyses Of Coal Extraction And Spoil Handling Techniques In Mountainous Areas, Shiva Prasad B. Kolli

Graduate Theses, Dissertations, and Problem Reports (ETD)

Surface mining of multiple seams by mountaintop mining methodology is complex in the Appalachian region of West Virginia. Mining operations in these mountainous areas can be considered as customized forms of surface mining techniques. The customization of the mining methods is greatly dominated by the location, geology, and stratigraphic succession of coal seams in the area.;Owing to its unique mining operations, and the environmental effects associated with it, mountaintop removal method of mining has become an issue of public concern. The pertinence of the present mountaintop mining operations and reclamation techniques, with respect to being in compliance with Surface Mining …

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Relational Specification As A Testing Oracle, Harjinder Sandhu May 2001

Relational Specification As A Testing Oracle, Harjinder Sandhu

Graduate Theses, Dissertations, and Problem Reports (ETD)

Software engineering community is well aware of the usefulness of formal methods for specifying, designing and testing of the software. Despite this testing literature rarely deals with specification based testing. Testing from formal specifications offers a simple, structured and more rigorous approach to the functional tests than testing techniques. An important application of specification in testing is providing test oracles. The rise of use of computers in control safety critical systems, i.e., flight control systems, necessitates that rigorous system testing is performed before the deployment. In flight control systems, requirements are mostly concerned with the safety and maneuverability of an …

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Cmos Fingerprint Sensor Electrostatic Modeling, Praveen Kumar Soora May 2001

Cmos Fingerprint Sensor Electrostatic Modeling, Praveen Kumar Soora

Graduate Theses, Dissertations, and Problem Reports (ETD)

The use of Biometrics in personal identification is an important emerging technology in modern electronic society. Fingerprints are one of the most popular biometric technologies, currently used in majority of biometric applications. In recent years, solid-state capacitive fingerprint sensors which image fingerprints using Silicon CMOS Technology are gaining much acceptance in the market. This research work is carried out to quantify and explore approaches for achieving improved sensitivity of the capacitive imaging process through reduction of parasitic capacitances and sensor cell scaling for future generation devices. Evaluation of sensor cell and array geometries was completed using a commercial 2-D electrostatic …

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Attitudes, Knowledge, And Implementation Of Biotechnology And Agriscience By West Virginia Agricultural Education Teachers, Jason E. Hughes May 2001

Attitudes, Knowledge, And Implementation Of Biotechnology And Agriscience By West Virginia Agricultural Education Teachers, Jason E. Hughes

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to provide information on the attitudes toward and knowledge level of biotechnology and agriscience as well as activities conducted which demonstrate implementation of biotechnology and agriscience by West Virginia Agricultural Education teachers.;Data was collected via a questionnaire. Knowledge level, teaching methods used, attitudes of the subject and teaching responsibilities, barriers to teaching, and preferred information sources of biotechnology and agriscience were the major parts. Demographics and level of science knowledge were other parts of the questionnaire.;A major finding of the study was that West Virginia agricultural education teachers possess a positive attitude towards biotechnology, …

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Scheduling Flexible Flowshops With Sequence -Dependent Setup Times, Kanchana Sethanan May 2001

Scheduling Flexible Flowshops With Sequence -Dependent Setup Times, Kanchana Sethanan

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation addresses the scheduling problem in a flexible flowshop with sequence-dependent setup times. The production line consists of S production stages, each of which may have more than one non-identical (uniform) machines. Prior to processing a job on a machine at the first stage, a setup time from idling is needed. Also sequence dependent setup times (SDST) are considered on each machine in each stage. The objective of this research is to minimize the makespan. A mathematical model was developed for small size problems and two heuristic algorithms (Flexible Flowshop with Sequence Dependent Setup Times Heuristic (FFSDSTH) and Tabu …

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Multimedia -Assisted Reading In Spanish And Its Relationship With The Cognitive Control Of Field Dependence And Field Independence, Laura Janes Little May 2001

Multimedia -Assisted Reading In Spanish And Its Relationship With The Cognitive Control Of Field Dependence And Field Independence, Laura Janes Little

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study examines the influence of the cognitive controls of field independence and field dependence on the use of a multimedia-assisted reading program and reading recall. The participants were 11 university students of intermediate Spanish as a second language. The participants were classified as field dependent or field independent based on GEFT scores. The participants read a passage about Mayan architecture that was converted to a multimedia-assisted format. Participants could access as many or as few of the multimedia aids as they chose. After completing the reading, a recall measure was obtained in which participants wrote everything they could recall …

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A Study Of The Effects Of The Posse Technique On The Perceptions Of Pre-Service Teachers In Teaching Learning Disabled Students., Kim H. Rotruck Jan 2001

A Study Of The Effects Of The Posse Technique On The Perceptions Of Pre-Service Teachers In Teaching Learning Disabled Students., Kim H. Rotruck

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study seeks to establish a benchmark on the perceptions of pre-service teachers (interns) in order to understand the factors influencing successful teaching of disabled students in the general education classroom. With the extensive body of research that indicates general educators request more training to teach disabled students, this study begins with four interns and generates information about the effects of a specific technique designed for teaching learning disabled students and observes the interns' perceptions as they teach learning disabled students. This technique predicts, organizes, searches, summarizes, and evaluates expository text (POSSE), which is characteristic of many effective reading techniques. …

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The Present Status Of Geography Education In Boys' Intermediate Schools Of Riyadh, Saudi Arabia., Abdulrahman Mohammed Al-Gahtany Jan 2001

The Present Status Of Geography Education In Boys' Intermediate Schools Of Riyadh, Saudi Arabia., Abdulrahman Mohammed Al-Gahtany

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to describe the present status of geography education in boys' intermediate schools in Riyadh, Saudi Arabia as perceived by geography teachers and supervisors; that is, to investigate the objectives, content, methods of teaching, tools and resources that are available and used in classrooms, evaluation techniques, and problems encountered in the teaching of geography. To collect data from this representative sample population, a questionnaire was developed by the researcher specifically for this study. Questionnaire data was collected from 19 social studies supervisors and 213 geography teachers. Percentages, frequencies, means, and standard deviations were computed for …

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Spatial Models Of Forest-Environment Relationships On The Appalachian Plateaus: The Allegheny Mountain Section, Western Maryland., Joshua Andrew Kincaid Jan 2001

Spatial Models Of Forest-Environment Relationships On The Appalachian Plateaus: The Allegheny Mountain Section, Western Maryland., Joshua Andrew Kincaid

Graduate Theses, Dissertations, and Problem Reports (ETD)

The goal of this thesis research was to show that spatial data do affect the results of the analysis of vegetation-environment relationships. Vegetation-environment relationships were modeled within the Allegheny Mountain section of the Appalachian Plateaus physiographic province in western Maryland. Specifically, this research focused on two state forests, namely Garrett and Potomac State Forests, in Garrett County, Maryland. Four regression models were utilized in this research to model the basal area and diversity of the fifteen most prominent species relative to environmental factors within the two forests combined. A standard Ordinary Least Squares regression model with diagnostics for spatial effects …

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A Prototype Automatic Dental Identification System (Adis)., Diaa Eldin Mohamed Nassar Jan 2001

A Prototype Automatic Dental Identification System (Adis)., Diaa Eldin Mohamed Nassar

Graduate Theses, Dissertations, and Problem Reports (ETD)

In this work we apply combined digital image processing and artificial neural network techniques in developing a prototype of an automatic dental identification system (ADIS) to be employed for postmortem forensic identification. The prototype ADIS follows a pyramidal image-matching architecture used in developing an analogous fingerprint comparison system. Owing to the differences in image natures, we used new techniques and modified some mathematical models. We introduce an adaptive technique for dental radiograph enhancement and an adaptive strategic searching technique for neural network training. The training and testing results we obtained are promising.

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A Kinetic Treatment Of A Perpendicular Gradient In Field-Aligned Flow In A Thermally Anisotropic Plasma., Robert Samuel Spangler Jan 2001

A Kinetic Treatment Of A Perpendicular Gradient In Field-Aligned Flow In A Thermally Anisotropic Plasma., Robert Samuel Spangler

Graduate Theses, Dissertations, and Problem Reports (ETD)

The linearized dispersion relation describing waves in a plasma having a uniform magnetic field, uniform density, and inhomogeous parallel (to the magnetic field) flow [G. Ganguli, M.J. Keskinen, H. Romero, R. Heelis, T. Moore, and C. Pollock, J. Geophys. Res., 99, 8873 (1994)] is generalized to include thermal anisotropy, a key feature existing in many space and laboratory plasmas. The effects of ion thermal anisotropy on the ion acoustic mode is examined. The growth rate of the ion acoustic mode is shown to increase with TT ii ^ P , and the real frequency at which the maximum growth rate …

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A Comparative Analysis Of Perceptions Of Technology Among Doctoral Students From Selected Science, Technology, And Society (Sts) Programs In The United States., Chain-Wen Wang Jan 2001

A Comparative Analysis Of Perceptions Of Technology Among Doctoral Students From Selected Science, Technology, And Society (Sts) Programs In The United States., Chain-Wen Wang

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this research was to investigate, compare, and analyze perceptions of technology among the Science, Technology, and Society (STS) programs doctoral students, and to identify the institutional factors that influenced these perceptions. The data were collected through literature review, survey, interviews, and Internet searches. The treatment and analysis of data were combinations of quantitative and qualitative methods. The findings of this research indicated that: (1) various perceptions of technology exist among the scholars of technology identified for this research, (2) the STS doctoral students seem to differ in their perceptions of technology, (3) the majority of STS doctoral …

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Cross-Cultural Field Experiences In Costa Rica: A Qualitative Study Of Teacher Change., Peggy A. Romeo Jan 2001

Cross-Cultural Field Experiences In Costa Rica: A Qualitative Study Of Teacher Change., Peggy A. Romeo

Graduate Theses, Dissertations, and Problem Reports (ETD)

In order for teachers to be able to think and teach globally, they must be involved in cross-cultural experiences; experiences that lead to change. The purpose of the present study is to provide information that may be of value in determining if the experiences of a field course designed around a trip to Costa Rica generate professional and personal change in the teachers who participate in the course. Methods for data collection included (1) in-depth, open-ended interviews of the participants before and after the field course; (2) participant observation of the field trip; (3) evaluation of participant journals; and (4) …

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Shake, Rattle And Roll: Hazard Modeling In Indonesia Using Gis., Jacqueline K. Snyder Jan 2001

Shake, Rattle And Roll: Hazard Modeling In Indonesia Using Gis., Jacqueline K. Snyder

Graduate Theses, Dissertations, and Problem Reports (ETD)

The islands of Indonesia are unique in that they are prone to more combined natural disasters caused by volcanoes, earthquakes and tsunami than most other countries. Indonesia is also one of the most densely populated areas in the world. As a result, Indonesia is highly vulnerable to large-scale natural disasters. The political structure, island setting and economic status of the country have prevented the creation and implementation of a comprehensive vulnerability hazard model. Such a model would be an invaluable tool in reducing both economic loss and human casualties arising from natural hazards because it would identify vulnerable areas and …

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The Economic Cost Of Fatal Occupational Injuries In The United States., Elyce Anne Biddle Jan 2001

The Economic Cost Of Fatal Occupational Injuries In The United States., Elyce Anne Biddle

Graduate Theses, Dissertations, and Problem Reports (ETD)

Occupational injuries claimed the lives of over 30,000 American workers from 1990-1995 as reported through the National Traumatic Occupational Fatalities (NTOF) surveillance system. Estimates of the value of these lives have been calculated, but nearly all studies present an aggregate value, which sheds no light on the variations in costs for different case or worker characteristics. This project developed a user-friendly computer program to calculate the cost of fatal occupational for exclusive use by the National Institute for Occupational Safety and Health (NIOSH). The model estimates comprehensive national costs for all occupational fatal injuries reported through NTOF, nearly $30 billion …

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An Analysis Of Service Sector Growth Effects On Income Inequality A Comparison Model Of Metropolitan And Non-Metropolitan Areas Of The Appalachia., Cheryl Lynne Peskar-Johnson Jan 2001

An Analysis Of Service Sector Growth Effects On Income Inequality A Comparison Model Of Metropolitan And Non-Metropolitan Areas Of The Appalachia., Cheryl Lynne Peskar-Johnson

Graduate Theses, Dissertations, and Problem Reports (ETD)

It is very difficult to find regional economic restructuring studies that examine economic well-being by analyzing the effects of service sector growth on income inequality. This study is a regional economic restructuring analysis. Through the use of county level data of 399 Appalachian Counties this study produced a comparison model of metropolitan and non-metropolitan areas. The main goal of my thesis was to evaluate the growing economic differences in income potentials that have resulted in new spatial inequalities in the United States. By regressing income inequality (GINI INDEX) against service sector growth this study was able to support earlier studies …

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Portraits Of The Songwriting Process In Elementary Classrooms, Sally Dhruva Stephenson Jan 2001

Portraits Of The Songwriting Process In Elementary Classrooms, Sally Dhruva Stephenson

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study uses the qualitative research technique of portraiture to study the songwriting process in elementary classrooms. In chapter one, the author provides a theoretical framework for incorporating the arts and music in general education, and proposes to provide support for incorporating the creative process of songwriting into the elementary curriculum. Chapter two reviews the research literature on the educational and therapeutic uses of songwriting, and published examples of educational applications of songwriting. In chapter three, the methodology of portraiture is explained and four research settings are described, one each in Virginia, West Virginia, Tennessee, and Maryland. Two of the …

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The Investigation Of The Relationship Between Middle School Organizational Health, School Size, And School Achievement In The Areas Of Reading, Mathematics, And Language., Janice Johnston Barth Jan 2001

The Investigation Of The Relationship Between Middle School Organizational Health, School Size, And School Achievement In The Areas Of Reading, Mathematics, And Language., Janice Johnston Barth

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study is to investigate the relationship between school organizational health, school size, and school achievement in the areas of reading, mathematics, and language as mediated by socioeconomic status (SES) in West Virginia public middle schools during the school year 1999-2000. The study will use the participating schools' free and reduced lunch rate to determine socioeconomic status. Once determined, socioeconomic status will be assumed as a mediating categorical variable and data analysis will determine its effects. The population for this study were the 99 West Virginia middle schools that were configured by the county boards of education …

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The Relationship Between Interorganizational Collaboration And The Perception Of School-Business Partnership Effectiveness In West Virginia., Julie Marie Norman Jan 2001

The Relationship Between Interorganizational Collaboration And The Perception Of School-Business Partnership Effectiveness In West Virginia., Julie Marie Norman

Graduate Theses, Dissertations, and Problem Reports (ETD)

School-business partnerships have proliferated in response to public outcry for education reform, yet little evidence exists to support that these collaborations are effective. The purpose of this study is to determine if a significant relationship exists between the factors influencing collaboration and school-business partnership effectiveness in West Virginia. This investigation was accomplished through survey research procedures using a questionnaire developed by the researcher upon careful review of the literature. Quantitative research was conducted on the perceptions of public school principals in West Virginia with regard to their school-business partnerships' effectiveness and the existence of environmental, organizational, and group interaction factors …

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Full Potential Linear Muffin-Tin Orbital Modeling Of Zinc-Selenide And Zinc-Magnesium-Selenide Alloy., Yaxiang Yang Jan 2001

Full Potential Linear Muffin-Tin Orbital Modeling Of Zinc-Selenide And Zinc-Magnesium-Selenide Alloy., Yaxiang Yang

Graduate Theses, Dissertations, and Problem Reports (ETD)

In this dissertation, we used ab-initio full potential linear muffin-tin orbital (FP-LMTO) method to study native defects, chlorine and nitrogen doping, and chromium incorporation issues in ZnSe and ZnMgSe alloys. The method we used and the results we obtained are discussed in details. In chapter 1, an introduction to recent studies in ZnSe was given. The methodology was discussed at chapter 2. In chapter 3, we studied lattice relaxation around native defects in ZnSe and formation energies for these native defects. Our results were compared with other theoretical results. In chapter 4, chlorine doping in ZnSe and ZnMgSe alloys are …

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Transfer Function Model For An Oxy-Fuel-Fired Batch Tank., James Robert Rhodes Jan 2001

Transfer Function Model For An Oxy-Fuel-Fired Batch Tank., James Robert Rhodes

Graduate Theses, Dissertations, and Problem Reports (ETD)

Oxy-fuel combustion is an alternative method for melting glass that has recently become increasingly attractive as one way for the glass industry to improve its energy efficiency and reduce its environmental impacts. Research, however, is still needed to better appreciate the advantages that oxy-fuel combustion offers to the users of the batch tanks. Efforts have been underway by the WVU Projects with Industry Program to identify the parameters that govern the combustion and control behavior of an oxy-fuel fired batch tank. The two primary goals of this thesis are to develop a transfer function model for the oxy-fuel fired batch …

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Enjoying A Bad Life: Short Fiction Drawn From Disorder., Kate Green Van Sant Jan 2001

Enjoying A Bad Life: Short Fiction Drawn From Disorder., Kate Green Van Sant

Graduate Theses, Dissertations, and Problem Reports (ETD)

My own cultural background is somewhat confused, and I inherited from my late father many strange and suspicious stories that can never be corroborated. This allowance for ambiguity also reminded me of my fondness for the labyrinths and forking paths of Borges, and I realized that this duality was probably closely related to my travels between cultural frontiers and my frequent passages between mania and depression. The narrator struggles for independence and emotional stability with humor, attempting to pull order, both creative and practical, from her disorder. Her success is to be judged not as much in her accomplishments as …

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A Computational Study Of Mixing In A Liquid Jet Impinging On An Immiscible Liquid Layer., Sherif Mohamed Kandil Jan 2001

A Computational Study Of Mixing In A Liquid Jet Impinging On An Immiscible Liquid Layer., Sherif Mohamed Kandil

Graduate Theses, Dissertations, and Problem Reports (ETD)

Droplet formation is a phenomenon that has great significance in multiphase flows, and it takes place in many natural and man-made applications. The application of interest in this study is the turbulent mixing of Diesel fuel and seawater during the refueling process of naval ships outfitted with compensated fuel ballast tanks (CFBT). Several phenomena take place in fuel tanks that cause turbulent mixing and thus droplet formation. These phenomena include, among other phenomena, a stratified shear flow of two immiscible fluids of different densities, and a densely buoyant vertical jet flow of a higher density fluid impinging on a quiescent …

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Mechanotransduction In Bone: Passive And Load-Induced Fluid Transport In Rat Femora., Bixia Li Jan 2001

Mechanotransduction In Bone: Passive And Load-Induced Fluid Transport In Rat Femora., Bixia Li

Graduate Theses, Dissertations, and Problem Reports (ETD)

The capacity of bone tissue to alter its mass and structure in response to mechanical demands has long been recognized but the mechanisms involved remained poorly understood. Load-induced interstitial fluid flow has been postulated to provide a mechanism for transduction of the mechanical signals to the cellular level to activate bone adaptation. This research is to investigate experimentally the effects of mechanical loading on fluid flow in bone by introducing stain/tracer. Rat femurs were used to test the passive diffusion and mechanical transport properties of the stain in bone. It was found that fluorescein is compatible with an animal model …

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A Simulation And Analysis Toolbox For Power Systems And Genetic Algorithm-Based Damping Controller Design., Amer Hasanovic Jan 2001

A Simulation And Analysis Toolbox For Power Systems And Genetic Algorithm-Based Damping Controller Design., Amer Hasanovic

Graduate Theses, Dissertations, and Problem Reports (ETD)

Due to the recent deregulation, difficulty in acquiring rights-of-way to build new transmission lines, and steady increase in power demand, maintaining power system stability becomes evermore difficult and very challenging problem. Implementation of new equipment based on the latest technologies and proper controller design become essential for improvement of transient and oscillatory stability margins. To be able to develop and test these new devices and their controls it is necessary to have simulation package that allows accurate modeling of all power system components. Simulation environment has to be modular enough to allow frequent additions of new components without compromising overall …

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An Intelligent System's Approach To Reservoir Characterization In Cotton Valley., Mofazzal Hossan Bhuiyan Jan 2001

An Intelligent System's Approach To Reservoir Characterization In Cotton Valley., Mofazzal Hossan Bhuiyan

Graduate Theses, Dissertations, and Problem Reports (ETD)

Reservoir characterization in the Cotton Valley formation has always been a challenge for the Engineers, Geologist and Geophysists because of its heterogeneity as well as for the fact that well logs and reservoir characteristics are non-correlatable from well to well. This study introduces a new technique to characterize the cotton valley reservoir. Synthetic magnetic resonance imaging logs (MRI) provide information about reservoir characteristics such as effective porosity, fluid saturation and rock permeability more accurately than conventional wireline logs. The fuzzy C- mean analysis tool is utilized to group well logs together based on similarity criteria of the reservoir formation and …

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A Non-Invasive Technique For Monitoring Miotic Eye Responses., Ahmed M. El-Sherbeeny Jan 2001

A Non-Invasive Technique For Monitoring Miotic Eye Responses., Ahmed M. El-Sherbeeny

Graduate Theses, Dissertations, and Problem Reports (ETD)

The eye is a very sensitive organ of the human body, and is subject to many hazards that may cause disorders such as miosis. Thus non-costly, non-invasive, safe methods for pupil assessment and monitoring are of the essence. Proposed is a simple eye scanning mechanism that periodically reports whether the pupil has experienced miosis or dilatation due to an external illumination source. The process uses a Clanguage program to control the image-grabbing process, as well as determining the pupil constriction/dilation conditions. The program focuses on dynamically isolating the pupil by producing a threshold for it that varies with the measured …

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Reading Instructional Leadership: A Survey Of Middle Level Principals In West Virginia Public Schools., Mary Lee Porter Jan 2001

Reading Instructional Leadership: A Survey Of Middle Level Principals In West Virginia Public Schools., Mary Lee Porter

Graduate Theses, Dissertations, and Problem Reports (ETD)

A review of the literature on reading and principals' reading instructional leadership indicates that nationally there is a crisis in middle level reading (grades, 5, 6, 7, 8, & 9). This study focused on the reading instructional leadership of Middle Childhood Level principals in West Virginia. Principals in West Virginia are held legally responsible for the academic achievement of their schools and thus, are charged with instructional leadership and assuring that “best practices” are used in their schools. This study attempted to identify the beliefs, experiences, demographic criteria, and best practices that principals believe have impacted SAT9 test scores at …

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