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Articles 1 - 30 of 276
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Effects Of Ownership And Circulation On Editorial Presentation In West Virginia Newspapers, Matthew E. Umstead
Effects Of Ownership And Circulation On Editorial Presentation In West Virginia Newspapers, Matthew E. Umstead
Graduate Theses, Dissertations, and Problem Reports
This thesis, which focuses on the post-yellow journalism era in West Virginia, further develops the body of research done on the influence of chain ownership in newspapers.;Historically, strong political biases in news coverage were found in the yellow journalism, early 20th century period. And this study finds a conservative bias on the opinion-editorial pages in a traditionally Democratic state with few competing media markets and reliance upon newspapers for local news. This thesis finds ownership status and circulation size affects the balance and variety of feature items presented within the opinion editorial content. Thus, previous research suggesting chain ownership influence …
Optimization Of A Helicon Plasma Source For Maximum Density With Minimal Ion Heating, Matthew M. Balkey
Optimization Of A Helicon Plasma Source For Maximum Density With Minimal Ion Heating, Matthew M. Balkey
Graduate Theses, Dissertations, and Problem Reports
Measurements of electron density and perpendicular ion temperatures in an argon helicon plasma are presented for five different antennas: A Nagoya type III antenna, a double-saddle antenna, a 19 cm long m = +1 helical antenna, a 30 cm long m = +1 helical antenna and a 19 cm m = +1 helical antenna with wide straps. Electromagnetic wave measurements in the range from 100 kHz to 50 MHz are also presented for a wide range of plasma parameters. The data show a clear transition between RF power coupling to the plasma to create density and coupling to heat ions. …
Computational Model Of Ductile Erosion By Single Particle Impact, Chandrakant Rai
Computational Model Of Ductile Erosion By Single Particle Impact, Chandrakant Rai
Graduate Theses, Dissertations, and Problem Reports
Erosion by solid particle impact is a common problem in many industrial applications. It results due to mechanical contact between the particle and the metal surface, which in turn result in potential material losses. Erosion of machine parts by the small solid particle entrained in liquid or gaseous working environment is a serious problem in many industrial applications. Numerous experiments have been conducted to obtain empirical relations for predicting material loss due to these impacts and to arrive at an appropriate material for a particular working environment. But with so many new materials being used for different applications, and operating …
West Virginians' Perceptions And Use Of Complementary Medicine, Joshua David Blevins
West Virginians' Perceptions And Use Of Complementary Medicine, Joshua David Blevins
Graduate Theses, Dissertations, and Problem Reports
The purpose of this study was to determine how West Virginian's perceive and use complementary medicine. The first objective was to determine the frequency of respondents who had used at least one complementary therapy in the last year. The second objective was to determine the most commonly used complementary therapies among respondents. The third objective was to examine the demographic characteristics of respondents who used complementary therapies. The fourth objective was to determine if certain types of medical problems led to complementary medicine use among respondents. The fifth objective was to show the percentage of users who informed their physician …
Encoding Of Periodic Skin Stimuli By Spinal Dorsal Horn Neurons, Jeffrey J. Lawson
Encoding Of Periodic Skin Stimuli By Spinal Dorsal Horn Neurons, Jeffrey J. Lawson
Graduate Theses, Dissertations, and Problem Reports
The encoding of vibrotactile pitch by neurons of the somatosensory system has been investigated at many levels of the neuraxis. These studies, however, have not extended to the spinal dorsal horn, which is known to process low threshold mechanoreceptive input. The studies presented here were designed to assess the possible role of the dorsal horn in the encoding of vibrotactile pitch. To accomplish this task, dorsal horn single unit extracellular recordings were obtained during periodic electrical and sinusoidal mechanical stimulation of their receptive fields. Techniques used in classifying vibrotactile pitch encoding were similar to those used in other somatosensory nuclei, …
Three-Dimensional Image Reconstruction Of Skeletal Tissue From Computed Tomography, Sundareswar Bangalore Jayashekar
Three-Dimensional Image Reconstruction Of Skeletal Tissue From Computed Tomography, Sundareswar Bangalore Jayashekar
Graduate Theses, Dissertations, and Problem Reports
Edge Detection Techniques play a very important role in medical imaging. Pre-operative diagnosis of diseases such as cancer, tumors, bone fractures etc. depend on edge detection techniques to identify the malignant growths. In orthopedics, edge detection techniques are used in the reconstruction of the skeletal system from modalities such as MRI (magnetic resonance imaging) and CT (computed tomography).;In this thesis, we develop a simple process for the three dimensional image reconstruction of the human knee, starting from computed tomography scans. Designing a digital image processing technique which successfully separates the bone from the surrounding flesh and muscle tissue is the …
Burnout, Stress And Social Support Among Doctoral Students In Psychology, Kelli Lee Weaver
Burnout, Stress And Social Support Among Doctoral Students In Psychology, Kelli Lee Weaver
Graduate Theses, Dissertations, and Problem Reports
The relationships between burnout, stress, and social support have been evaluated across a number of populations within the helping professions. However, no published studies have addressed the relationships between the aforementioned variables among doctoral students in psychology. As a result, the current study attempted to expand knowledge of the relationships between burnout, stress, and social support specifically among Clinical, Counseling, and School Psychology doctoral students. Results suggested that Clinical, Counseling, and School Psychology doctoral students are generally similar in their reports of burnout, stress, and social support. However, several differences were observed between the groups, and these differences are reported. …
Development Of An Integrated Project-Level Pavement Management Model Using Risk Analysis, Jennifer A. Reigle
Development Of An Integrated Project-Level Pavement Management Model Using Risk Analysis, Jennifer A. Reigle
Graduate Theses, Dissertations, and Problem Reports
Historically, federal highway funding focused on the construction of new pavements and the upgrading of existing pavements. Today, much of the infrastructure is in place. Therefore, the focus of federal funding is shifting toward pavement maintenance and preservation. With this is mind, highway agencies are directing attention toward pavement preservation strategies that yield the greatest value from existing pavements.;Life cycle cost analysis (LCCA) is a decision-making tool that highway agencies may use in selecting an optimal pavement preservation strategy. Traditionally, LCCA models for pavement management use discrete input values that represent a conservative "best guess" of each parameter. Thus, inherent …
Development And Evaluation Of Glass Fiber-Reinforced Composite/Wood Railroad Crossties, Krit Laosiriphong
Development And Evaluation Of Glass Fiber-Reinforced Composite/Wood Railroad Crossties, Krit Laosiriphong
Graduate Theses, Dissertations, and Problem Reports
Railroad crossties are strengthened by wrapping glass fiber reinforced composites (GFRC). In addition, durability of crossties has been found to have enhanced by reinforcing them with GFRC wraps. In order to reduce the cost, GFRC wraps are not used to wrap the entire length of a crosstie, but only in the region that holds steel plates. The objective of this research is to select compatible adhesive between creosote treated wood and glass fabric, and study the performance of wrapped wooden crossties.;Five primer/resin combinations (Resorcinol Formaldehyde group) were screened for strength and durability of treated wood crossties. To evaluate stiffness and …
Predicting A Detailed Permeability Profile From Minipermeameter Measurements And Well Log Data, Shawn D. Nines
Predicting A Detailed Permeability Profile From Minipermeameter Measurements And Well Log Data, Shawn D. Nines
Graduate Theses, Dissertations, and Problem Reports
Permeability, along with the porosity, comprises one of the two most important properties in petroleum engineering with respect producing hydrocarbon fluids.;It is standard practice in the petroleum industry to determine permeability in one of two ways. These are pressure transient testing and core analysis. Both methods are expensive in their own ways. This research focuses on a way to minimize or limit the need for both of these testing procedures.;The purpose of this research was to utilize well log data, mainly gamma ray and density, Minipermeameter values, and basic information such as depth and spatial coordinates to predict permeability in …
Influence Of Fuel Sulfur Content On Emissions From Diesel Engines Equipped With Oxidation Catalysts, Jason Carter Evans
Influence Of Fuel Sulfur Content On Emissions From Diesel Engines Equipped With Oxidation Catalysts, Jason Carter Evans
Graduate Theses, Dissertations, and Problem Reports
Diesel oxidation catalysts (DOCs) are a viable exhaust aftertreatment alternative for alleviating regulated exhaust emissions of hydrocarbon (HC), carbon monoxide (CO), and particulate matter (PM) from diesel-fueled heavy-duty engines. This study was a part of the Diesel Emissions Control-Sulfur Effects (DECSE) program that was aimed at determining the impact of diesel fuel sulfur levels on diesel oxidation catalysts that were designed to lower brake-specific PM, HC, and CO emissions from on-highway trucks and buses in the 2002--2004 model years. The research focused on high-temperature DOCs installed on a Cummins ISM370 ESP engine, and low-temperature DOCs installed on a Navistar T444E …
Parallelization Of Ecg Template-Based Abnormality Detection, Sherry Lea Kratsas
Parallelization Of Ecg Template-Based Abnormality Detection, Sherry Lea Kratsas
Graduate Theses, Dissertations, and Problem Reports
In order to develop techniques to predict cardiac arrest, long-term study of electrocardiogram (ECG) data needs to be done to detect changes in electrical activity of diseased hearts. In the past, limitations of computing power and storage space restricted the duration of long-term studies to several days. However, with today's technological advancement, data collection can be extended to months or years. The goal of this thesis research is to evaluate several alternatives for distributing the analysis of ECG data over multiple processors. Parallel algorithms utilizing Correlation Waveform Analysis (CWA) were implemented to compare individual heartbeats and form heartbeat templates. The …
Electrospray Ionization Mass Spectrometry For The Analysis Of Proteins And Small Molecules, Gregg A. Pratt
Electrospray Ionization Mass Spectrometry For The Analysis Of Proteins And Small Molecules, Gregg A. Pratt
Graduate Theses, Dissertations, and Problem Reports
In this document methods for the analysis of proteins and small molecules by Electrospray Ionization Mass Spectrometry (ESI-MS) are discussed. Section I contains an introduction to ESI-MS, including a brief history of mass spectrometry, a discussion of the current theories developed to explain the mechanisms at work during the electrospray process, and an explanation of Ion Trap Mass Spectrometry (IT-MS), the type of mass analyzer used for the studies outlined in subsequent chapters.;Section II is devoted to the analysis of proteins by ESI-MS. Chapter 2 gives an overview of protein structure and reviews previous work in the area of protein …
Diversity Of Ectomycorrhizal Fungi On Two Reclaimed Surface Mines Differing In Soil Properties, Betsy S. Kurnik
Diversity Of Ectomycorrhizal Fungi On Two Reclaimed Surface Mines Differing In Soil Properties, Betsy S. Kurnik
Graduate Theses, Dissertations, and Problem Reports
I analyzed community structure of ectomycorrhizal fungi on white pine (Pinus strobus) on two reclaimed surface mines in eastern Ohio. One site was acidic and metal-stressed, the other was alkaline. Completely different community composition was found on the two sites by PCR/ITS/RFLP analyses of field collected mycorrhizae. However, Shannon-Wiener index values indicated that the two communities were equally diverse. A population of isolates of one species common to both sites was obtained from trap cultures planted with white pine. The identity of this species as Wilcoxina mikolae was established through DNA sequencing of the ITS region. The W. mikolae populations …
Alexander Von Humboldt And Nineteenth-Century Ideas On The Origin Of American Indians, Michael Anthony Wadyko
Alexander Von Humboldt And Nineteenth-Century Ideas On The Origin Of American Indians, Michael Anthony Wadyko
Graduate Theses, Dissertations, and Problem Reports
This dissertation revolves around Alexander von Humboldt's research on Indian origins. Humboldt conducted investigations on Indians during his precedent-setting scientific expedition to Meso- and South America during the years 1799--1804. Officially sponsored by the Spanish crown, the main purposes for this expedition were twofold: to examine, evaluate, and discredit Buffon's "degeneracy" claims about America and its inhabitants, and to gather empirical evidence on geography, climate, flora, fauna, and the indigenous cultures. From these results Humboldt published three major works about the expedition, particularly a thirty-volume work condensed to two volumes, Vues de Cordilleres et monuments des peuples d' Amerique.;From this …
Differences In Groupings Of Students' Academic Achievement, Attendance And Attitude As They Move From A Traditional To A Modified 4 X 4 Block Schedule, Charles Theodore Keenan
Differences In Groupings Of Students' Academic Achievement, Attendance And Attitude As They Move From A Traditional To A Modified 4 X 4 Block Schedule, Charles Theodore Keenan
Graduate Theses, Dissertations, and Problem Reports
The purpose of this investigation is to identify the differences in groups of high school students' achievement, attendance, and attitude as they move from a traditional schedule to a modified 4 x 4 block schedule. The population for this study consisted of all 10th, 11th, and 12th grade students at a high school during the 1998--1999 school year. There were four samples taken from this population, the first, second, third, and fourth quartiles of students. A survey questionnaire was used to determine student attitude. This survey was distributed to all 10th, 11th, and 12th grade students at the high school …
Voltage Collapse Prediction For Interconnected Power Systems, Amer S. Al-Hinai
Voltage Collapse Prediction For Interconnected Power Systems, Amer S. Al-Hinai
Graduate Theses, Dissertations, and Problem Reports
A steady state analysis is applied to study the voltage collapse problem. The modal analysis method is used to investigate the stability of the power system. Q-V curves are used to confirm the obtained results by modal analysis method and to predict the stability margin or distance to voltage collapse based on reactive power load demand. The load characteristics are considered in this research. Different voltage dependent loads are proposed in order to be used instead of the constant load model. The effect of induction machine load is considered in this study. The load is connected to several selected buses.;The …
Synthesis And Characterization Of Metal Oxide Nanoparticles, Heidi Jo Magnone
Synthesis And Characterization Of Metal Oxide Nanoparticles, Heidi Jo Magnone
Graduate Theses, Dissertations, and Problem Reports
Nanoparticles of CuO, Co3O4 and Mn5O 8 were prepared via sol-gel chemical routes. Thermal treatments of the gels were used to obtain particles of different sizes, as determined by the widths of the Bragg lines in x-ray diffraction. To prepare CuO nanoparticles, a Cu(OH)2 gel was first produced by reacting copper nitrate with sodium hydroxide, followed by annealing the gel at temperatures between 160°C to 1,000°C to produce particles in the 6 to 36 nm range. Nanoparticles of Co3O4 in the size range of 9 to 45 nm were prepared in an analogous manner by reacting cobalt nitrate and sodium …
Investigation And Simulation Of The Planetary Combination Hybrid Electric Vehicle, Csaba Toth-Nagy
Investigation And Simulation Of The Planetary Combination Hybrid Electric Vehicle, Csaba Toth-Nagy
Graduate Theses, Dissertations, and Problem Reports
The purpose of this study was the detailed examination of a Planetary Combination Hybrid Electric Vehicle design (PC-Hybrid). The PC-Hybrid unites all the advantages of the existing hybrid electric vehicle powertrain concepts, such as series, parallel and combination, while eliminating the disadvantages of each.;The PC-Hybrid powertrain is built up of an internal combustion engine, and two electric motor/alternators connected together via a planetary gear set. Several different powertrain configuration layouts were investigated as possible setups of the PC-Hybrid and the two most promising ones were chosen for further investigation and simulation. A control strategy has been developed for the optimal …
Improving The Simulation Of A Waterflooding Recovery Process Using Artificial Neural Networks, Edison Gil
Improving The Simulation Of A Waterflooding Recovery Process Using Artificial Neural Networks, Edison Gil
Graduate Theses, Dissertations, and Problem Reports
The waterflood performance of the dual five-spot pilot project in the Stringtown oil field, situated in West Virginia, has been studied. A numerical simulator, called BOAST98, was used for the simulation purposes, after developing a reservoir description.;The producing horizon in the field is the Upper Devonian Gordon sandstone, which is characterized by severe heterogeneity due to the depositional environment. Using available core and log data and geological analysis, a reservoir characterization study was done. A preliminary reservoir description based on log porosity-core permeability correlation was improved by developing Artificial Neural Networks (A.N.N.), which incorporates geophysical well log information. These A.N.N.'s …
Improving Commercial Vehicle Crash Data Quality In West Virginia, Kris Sean Gillespie
Improving Commercial Vehicle Crash Data Quality In West Virginia, Kris Sean Gillespie
Graduate Theses, Dissertations, and Problem Reports
The purpose of this study was to identify methods to improve commercial carrier crash data in West Virginia including coal trucks. All organizations and agencies involved with commercial carrier safety need ready access to basic data describing the crash-involved operator, vehicle, and environment. Such data are necessary to any programmatic or engineering countermeasures. The basic approach used to accomplish the research objectives involved a series of regional meetings where law enforcement personnel expressed their opinions about ways to improve commercial vehicle crash data quality. These results were then weighted and prioritized. The top five solutions generated at these meetings were: …
Optimization Of A Roll Over Protective Structure (Rops) Using Nonlinear Finite Element Analysis, Adam Michael Gillispie
Optimization Of A Roll Over Protective Structure (Rops) Using Nonlinear Finite Element Analysis, Adam Michael Gillispie
Graduate Theses, Dissertations, and Problem Reports
The use of a conventional Roll Over Protective Structure CROPS) on farm tractors over the years has saved numerous lives and prevented countless injuries. By removing the ROPS, the tractor operators place themselves in unwarranted danger.;This led the National Institute for Occupational Safety and Health (NIOSH) and West Virginia University Mechanical and Aerospace Engineering to the development of a deployable ROPS, which could remain down to aid in required housing space for the tractor and prevent debris from striking the tractor operator while being driven.;This research effort focuses on the application of computer-aided design and analysis to structurally optimize the …
Carbon Products From Coal Liquefaction Fractions, Lizbeth Laureano-Perez
Carbon Products From Coal Liquefaction Fractions, Lizbeth Laureano-Perez
Graduate Theses, Dissertations, and Problem Reports
Processes for coal conversion are being evaluated for the development of carbon-product precursors. In the present work, coal hydrogenation is being considered as a procedure for tailoring the properties of the precursors for specific carbon products. The object of this project is to assess and evaluate such coal-derived materials for use as precursors for the production of carbon products. Coal liquefaction samples are made under various processing conditions, e.g. temperature, pressure, solvent. Softening points, ash content and coking values of the samples are determined at WVU by ASTM methods. These samples were also examined for coke microstructure and mesophase formation. …
Evaluation Of Opacity, Particulate Matter, And Carbon Monoxide From Heavy-Duty Diesel Transient Chassis Tests, Ronald Page Jarrett
Evaluation Of Opacity, Particulate Matter, And Carbon Monoxide From Heavy-Duty Diesel Transient Chassis Tests, Ronald Page Jarrett
Graduate Theses, Dissertations, and Problem Reports
Opacity and emission data were collected from heavy-duty diesel engines exercised through snap-acceleration tests and transient chassis dynamometer tests. Emission data were gathered using the West Virginia University (WVU) Transportable Heavy Duty Vehicle Emission Testing Laboratories (THDVETL) and opacity data were collected from two opacity meters; the Wager 650CP full flow opacity meter and the Bosch RT 100 partial flow opacimeter. Results showed that the Bosch peak opacity readings were consistently higher than the Wager peak opacity readings, and both meters showed little correlation with filter-captured particulate matter (PM). It was also observed that the snap-acceleration test did not identify …
Design, Construction, And Evaluation Of Coal Extraction Pilot Plant To Manufacture Coal-Based Carbon Pitch, Brian Wayne Bland
Design, Construction, And Evaluation Of Coal Extraction Pilot Plant To Manufacture Coal-Based Carbon Pitch, Brian Wayne Bland
Graduate Theses, Dissertations, and Problem Reports
A solvent extraction technique for removing mineral matter, including the inorganic sulfur, from coal has been developed by the Department of Chemical Engineering at WVU. The extraction is preformed at mild conditions (202°C and atmospheric pressure) using the solvent N-Methyl-2-Pyrrolidone (NMP). Laboratory results have shown that this technique yields a clean coal product containing less than 1 percent ash and virtually no inorganic sulfur.;This research was conducted for further process design and economic development of an industrial-scale extraction process.;This research reported the possibility of production scale processing by constructing a pilot plant. The pilot plant was used to explore the …
Representative Ways To Analyze And Survey Changes In Long-Term Electrocardiographic Recordings, Simona Gabriela Crihalmeanu
Representative Ways To Analyze And Survey Changes In Long-Term Electrocardiographic Recordings, Simona Gabriela Crihalmeanu
Graduate Theses, Dissertations, and Problem Reports
The goal of this research is to explore techniques with which long-term physiologic time-series data can be analyzed, so that relevant changes in physiological signals, particularly the electrocardiogram signal, can be captured, processed, quantified and stored. A new experimental model was developed such that the electrocardiogram can be monitored continuously over thirteen weeks. Cardiotoxicity was progressively induced with doxorubicin in a rabbit model, and electrocardiographic progressions from normal state to diseased state were continuously tracked. Automated methods for analyzing the data were developed to manage and control the extensive electrocardiogram dataset. A significant challenge to this work is the sheer …
Restimulation Candidate Selection Using Virtual Intelligence, Khalid Y. Mohamad
Restimulation Candidate Selection Using Virtual Intelligence, Khalid Y. Mohamad
Graduate Theses, Dissertations, and Problem Reports
Due to the importance of well deliverability maintenance, a committee of specialists from Dominion East Ohio and other service companies meets every year to select the wells to be included in the deliverability maintenance plan. The application tool not only help in selecting the wells for deliverability maintenance plan but goes beyond that by designing the most optimum frac recipe.;The purpose of this study is to develop an engineering tool that will help petroleum engineers making a better decision for selecting well candidate and design well restimulation. The project focuses on a gas storage field and use data such as …
Approaches To Creating Anonymous Patient Database, Shijun Shen
Approaches To Creating Anonymous Patient Database, Shijun Shen
Graduate Theses, Dissertations, and Problem Reports
Health care providers, health plans and health care clearinghouses collect patient medical data derived from their normal operations every day. These patient data can greatly benefit the health care organization if data mining techniques are applied upon these data sets. However, individual identifiable patient information needs to be protected in accordance with Health Insurance Portability and Accountability Act (HIPAA), and the quality of patient data also needs to be ensured in order for data mining tasks achieve accurate results. This thesis describes a patient data transformation system which transforms patient data into high quality and anonymous patient records that is …
Treatment Of Acid Mine Drainage With Weirton Steel Slags, Prashant Seshadri
Treatment Of Acid Mine Drainage With Weirton Steel Slags, Prashant Seshadri
Graduate Theses, Dissertations, and Problem Reports
Bed experiments were conducted to treat acid mine drainage with Weirton steel slag which contained 72.22% as Ca(OH)2 equivalent. The Acid Mine Drainage (AMD) sample was obtained from the T&T site located in northern West Virginia. The pH of the solution was 2.56 and the iron content was 89 ppm. The bed was constructed with tin-coated aluminum sheets and was 11&feet;8-1/4&inches; long, 2&inches; wide and 2&inches; high. The experiments were conducted by charging the bed half full with the slag particles (4 x 40 mesh) and then pumping AMD solution (T&T) through the bed. The flow rates used were 78 …
Hazardous Materials Database, Veena Vadiala
Hazardous Materials Database, Veena Vadiala
Graduate Theses, Dissertations, and Problem Reports
Handling and disposal of a retired object can be a major component of its Life Cycle Cost. Often, during dismantling of a retired object many hazardous materials are released. Disposal of hazardous materials also need to comply with various federal regulations. Agencies like Occupational Safety and Health Administration (OSHA) and the Environmental Protection Agency (EPA) set these safety regulations. It is possible to apply generic exposure and release controls to protect workers from hazardous materials. For the most cost effective hazard controls it is necessary first to identify the materials and their properties of primary concern. There is a need …