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Modeling And Dynamic Stability Of Distributed Generations, Zhixin Miao Aug 2002

Modeling And Dynamic Stability Of Distributed Generations, Zhixin Miao

Graduate Theses, Dissertations, and Problem Reports (ETD)

The objective of this dissertation is to develop dynamic models for distributed generations (DG), to investigate their impacts on dynamic stability of power distribution systems, and to design controllers for DGs to improve the dynamic stability of the integrated power distribution system.;A two-year distributed generation (DG) project at West Virginia University (WVU) evaluated the impact of various DG sources on actual distribution systems by performing computer simulations. The data is supplied by two regional electric utilities of two actual distribution systems each. In this project several important issues were investigated, including the availability of simulation tools and impacts of DGs …


Ant Colony Heuristics For The Dynamic Facility Layout Problem, Jin Shang Aug 2002

Ant Colony Heuristics For The Dynamic Facility Layout Problem, Jin Shang

Graduate Theses, Dissertations, and Problem Reports (ETD)

As global economic competition and cooperation become more and more drastic, the enterprise's facility layout needs to be more flexible to adapt to the rapidly changing environment. Therefore, attention should be given to the dynamical nature of the facility layout. In other words, the flow of materials between departments changes during the planning horizon (multiple periods) and should be considered. This problem is known as the dynamic facility layout problem (DFLP).;This research proposes three heuristics based on the ant colony optimization (ACO) heuristic to solve the DFLP. The performance of the heuristics was evaluated using two data sets taken from …


Effects Of Edge And Coarse Woody Debris On Small Mammal Communities In Riparian And Upland Habitats In Northern West Virginia, Joseph Daniel Osbourne Aug 2002

Effects Of Edge And Coarse Woody Debris On Small Mammal Communities In Riparian And Upland Habitats In Northern West Virginia, Joseph Daniel Osbourne

Graduate Theses, Dissertations, and Problem Reports (ETD)

The effects on biological communities of human-induced disturbances such as road construction for logging and military activities are a topic of much controversy in modern society. Furthermore, the response of small mammal communities to edge and coarse woody debris (CWD) volume in riparian and upland habitats of the central Appalachian Mountains has received little attention. The objectives of this study were to: (1) Perform a faunal survey of the Camp Dawson Collective Training Area in Preston County, West Virginia with an emphasis on rare and endangered species, (2) Estimate small mammal abundance, diversity, and condition in response to CWD manipulation, …


Intercropping With Resistant Cultivars Reduces Early Blight And Root Knot Disease On Susceptible Cultivars Of Tomato (Lycopersicon Esculentum), Linley Joy Smith Aug 2002

Intercropping With Resistant Cultivars Reduces Early Blight And Root Knot Disease On Susceptible Cultivars Of Tomato (Lycopersicon Esculentum), Linley Joy Smith

Graduate Theses, Dissertations, and Problem Reports (ETD)

The objective of this research was to determine if disease on susceptible tomato cultivars is reduced by intercropping with resistant cultivars. A second objective was to investigate the mechanism of the disease reduction observed. Early blight (caused by Alternaria solani) rate of disease increase and lesion expansion were lower on susceptible tomato cv. 'Brandywine' when intercropped with resistant cv. 'Juliet' than with 'Brandywine' monoculture in both the field and greenhouse. Yield from 'Brandywine' plants was 17.3% greater when intercropped with 'Juliet' than when grown in monoculture. Reduction in lesion expansion on 'Brandywine' when intercropped with 'Juliet' suggests an interaction initiating …


Anatomical And Physiological Properties Of The Superior Paraolivary Nucleus In The Rat, Randy Joseph Kulesza Jr. Aug 2002

Anatomical And Physiological Properties Of The Superior Paraolivary Nucleus In The Rat, Randy Joseph Kulesza Jr.

Graduate Theses, Dissertations, and Problem Reports (ETD)

The superior paraolivary nucleus (SPON) is a group of neurons located within the superior olivary complex, a constellation of brainstem nuclei involved in auditory processing. The major inputs to the SPON arise from the contralateral ear and SPON axons target primarily the ipsilateral inferior colliculus. However, little is known regarding the neurochemical phenotypes present in the SPON and how these neurons respond to auditory stimuli. Understanding the neurochemical and physiological properties of the constituent neurons will provide insight into the functional role of the SPON and will contribute to our understanding of the neural circuitry involved in hearing. Immunocytochemical, stereological, …


Relative Abundance, Temporal Distribution, And Functional Feeding Groups Of Aquatic Insects In Two First-Order Southwestern Pennsylvania Streams, Judith S. Steinberg Aug 2002

Relative Abundance, Temporal Distribution, And Functional Feeding Groups Of Aquatic Insects In Two First-Order Southwestern Pennsylvania Streams, Judith S. Steinberg

Graduate Theses, Dissertations, and Problem Reports (ETD)

Two first to second order streams (Kent Run and Munnell Hollow) at Ryerson Station State Park, Greene County, Pennsylvania, were compared as to water parameters (dissolved oxygen, hardness, temperature, pH, and current velocity), species diversity, and abundance of both immature and adult insects. Samples were taken biweekly for one year from May, 1999 through April, 2000 for a total of 26 sampling periods. Data were analyzed using a repeated measures ANOVA. Kent Run had lower dissolved oxygen, higher pH and hardness, lower temperatures, and higher current velocity. A total of 137 taxa were collected at both streams. Of the total …


What Is The Effect Of West Virginia Principals' Leadership Styles, Their Levels Of Computer Anxiety, And Selected Personal Attributes Upon Their Levels Of Computer Use?, James Patrick Law Aug 2002

What Is The Effect Of West Virginia Principals' Leadership Styles, Their Levels Of Computer Anxiety, And Selected Personal Attributes Upon Their Levels Of Computer Use?, James Patrick Law

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study examined the relationship between the preferred leadership styles, the levels of computer anxiety, and the selected personal attributes of sex, age, and computer training upon the computer use of West Virginia public school principals. A one shot case study design was used to examine the relationships. Three instruments the Leadership Behavior Description Questionnaire-Self (LDBQ-Self), the Computer Anxiety Rating Scale-C (CARS-C), and the Levels of Computer Use (LCU) survey, along with a cover letter and a short personal attribute questionnaire were mailed to randomly selected sample of 160 West Virginia principals. Responses were received from 93 (58.1%) of the …


Establishing Design Vehicles For The Hang-Up Problem, Amy Lorraine Clawson May 2002

Establishing Design Vehicles For The Hang-Up Problem, Amy Lorraine Clawson

Graduate Theses, Dissertations, and Problem Reports (ETD)

Current design vehicles do not address the hang-up problem. Two factors affect hang-ups: vehicle geometry and roadway geometry. There is a need to establish design vehicle characteristics for hang-up prone vehicles to reduce hang-ups potential.;Roadway geometry and vehicle characteristics relative to the hang-up problem were reviewed. Consideration of these properties by key organizations and associations, and government regulations were studied, and research performed by individuals establishing other design vehicles were analyzed. A general methodology was established.;When choosing design vehicles for the vehicle population, variation in vehicle population, the ramifications of using a limited number of vehicles, and local conditions were …


Flow Unit Prediction With Limited Permeability Data Using Artificial Neural Network Analysis, Benjamin Hale Thomas May 2002

Flow Unit Prediction With Limited Permeability Data Using Artificial Neural Network Analysis, Benjamin Hale Thomas

Graduate Theses, Dissertations, and Problem Reports (ETD)

The Appalachian Basin has numerous abandoned or marginally producing oilfields having significant recoverable oil remaining in place. Typically production records and reservoir data is not available. Presented is a new methodology, applicable to any field having limited records, designed for reservoir characterization via flow unit identification.;This methodology utilizes limited core permeability data from a few wells as a key to predicting flow units within a field when only log-based data is available. Primary software tools used include NeuroShell 2, an artificial neural network (ANN) program, and the Boast98 numerical simulator.;Various techniques for flow unit identification including graphic approaches using the …


Slow Wave Ion Heating And Parametric Instabilities In The Helix Helicon Source, John L. Kline May 2002

Slow Wave Ion Heating And Parametric Instabilities In The Helix Helicon Source, John L. Kline

Graduate Theses, Dissertations, and Problem Reports (ETD)

The primary focus of the experiments described here is to determine the mechanism responsible for intrinsic ion heating in helicon sources. Two possible mechanisms have been identified: ion Landau damping of the slow wave and parametrically driven instabilities. Consistent with ion Landau damping of the slow wave, the perpendicular ion temperatures 35 cm downstream of the RF antenna are largest when the RF frequency matches the local lower hybrid frequency; the condition at which the slow wave has a maximum in perpendicular wave number (perpendicular with respect to the applied magnetic field) due to a lower hybrid resonance. The ion …


Co -Curricular Involvement Of West Virginia Four-Year State College Students And The Statistical Relationship With Post -Graduate Community And Professional Involvement, Leadership, Salary, And Job Satisfaction, James D. Carpenter May 2002

Co -Curricular Involvement Of West Virginia Four-Year State College Students And The Statistical Relationship With Post -Graduate Community And Professional Involvement, Leadership, Salary, And Job Satisfaction, James D. Carpenter

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to examine the statistical relationship between co-curricular involvement of West Virginia college students and post-graduate involvement in community and professional organizations, leadership positions held within those organizations, professional salary, and self-perceived job satisfaction. A sample population of 400 college students (n = 400) from State-assisted colleges in West Virginia who completed baccalaureate requirements in 1990 was sent a copy of the West Virginia College and Community Involvement Survey and the Mohrman-Cooke-Mohrman Job Satisfaction Survey. Of 272 usable surveys, 142, or 52.2%, were returned.;Data analysis identified a significant statistical correlation between involvement in collegiate co-curricular …


Perceived Efficacy And Utilization Of The Oralcdx Brush Biopsy, Courtney Niccole Huffman May 2002

Perceived Efficacy And Utilization Of The Oralcdx Brush Biopsy, Courtney Niccole Huffman

Graduate Theses, Dissertations, and Problem Reports (ETD)

The OralCDx is a preliminary screening tool developed to identify suspicious lesions. Despite large numbers of persons diagnosed with oral cancers annually, minimal research has been conducted on the efficacy and utilization rates of OralCDx. The purpose of this study is to determine perceived efficacy and utilization rates of OralCDx nationwide. A 16-item survey was used to survey a random sample of 100 dentists and a 6-item survey was used to survey a random sample of 400 patients. Data analyses were conducted using frequencies, cumulative frequencies, percents, analysis of variance, and tests of chi-square using the JMP program. Preliminary results …


How Farmers In West Virginia Are Using Value-Added Processing To Increase Annual Income, Jennifer Leigh Lewis May 2002

How Farmers In West Virginia Are Using Value-Added Processing To Increase Annual Income, Jennifer Leigh Lewis

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study was to describe methods of value-added processing being employed by farmers in West Virginia, the amount of interest in value-added processing as expressed by agriculture extension agents and farmers, and identified the number of value-added producers in West Virginia. The population targeted with the initial survey consisted of 28 agriculture extension agents in West Virginia representing 55 counties. The second telephone survey was directed to value-added producers within the state. From this data, four farms, Thistledew Farm, Kelly Smith, Headwater Farms and Higson's Farm, were chosen to participate in case studies. Value-added producers were identified …


Herbal Supplement Education In Dental Hygiene Curricula, Lisa Elena Lisauckis May 2002

Herbal Supplement Education In Dental Hygiene Curricula, Lisa Elena Lisauckis

Graduate Theses, Dissertations, and Problem Reports (ETD)

While there is evidence in the literature of herbal supplement education in other disciplines, inclusion in dental hygiene curricula is not reported. The purpose of this study was to assess the prevalence and extent of herbal supplement education in the 256 accredited dental hygiene programs in the United States. A survey was sent to program directors. Data analyses, including frequencies, cumulative frequencies, percentages, analyses of variance, and test of Chi Square were conducted using JMP program. Surveys revealed 63% of respondents (n = 160) included herbal supplement education and primarily incorporated it in the pharmacology course (67%). Statistically significant differences …


Comparison Of Herpetofaunal Species Composition And Response To Edge On The Camp Dawson Collective Training Area, Preston County, West Virginia, Amy B. Spurgeon May 2002

Comparison Of Herpetofaunal Species Composition And Response To Edge On The Camp Dawson Collective Training Area, Preston County, West Virginia, Amy B. Spurgeon

Graduate Theses, Dissertations, and Problem Reports (ETD)

Herpetofaunal species composition, abundance, and diversity were evaluated on the Camp Dawson Collective Training Area, Preston County, West Virginia, as a requirement of the Sikes Act (16 USC 670a et seq.), Army Regulation 200-3, and Department of Defense Instruction 4715.3. Herpetofauna were sampled using pitfall traps with drift fences and double-ended funnel traps, and also from area searches. Redback salamander (Plethodon cinereus), red-spotted newt (Notophthalmus v. viridescens ), eastern American toad (Bufo a. americanus), and wood frog (Rana sylvatica) were most common in pitfall arrays; mountain dusky salamander (Desmognathus ochrophaeus), Appalachian seal salamander (Desmognathus m. monticola), and redback salamander were …


Overwintering Abundance And Distribution Of Striped Bass (Morone Saxtilis) In The Hudson River Estuary Using Hydroacoustic Techniques, Brian William Nagy May 2002

Overwintering Abundance And Distribution Of Striped Bass (Morone Saxtilis) In The Hudson River Estuary Using Hydroacoustic Techniques, Brian William Nagy

Graduate Theses, Dissertations, and Problem Reports (ETD)

Using a modification of standard techniques, a target strength to length relationship was developed for white perch (Morone americana) and striped bass (Morone saxtilis). This target strength to length relationship was compared to two standard relationships (Love and Foote). The calculated relationship was not found to be significantly different from Love's equation, but was different from Foote's equation. This calculated relationship was applied to hydroacoustic data collected on the Hudson River in December of 1995 and 1997. The goal of the hydroacoustic data collection was to assess the abundance and distribution of overwintering Hudson River striped bass. Results from this …


Integrated Through -Wafer Optical Monitoring Of Mems For Closed -Loop Control, Jeremy Michael Dawson May 2002

Integrated Through -Wafer Optical Monitoring Of Mems For Closed -Loop Control, Jeremy Michael Dawson

Graduate Theses, Dissertations, and Problem Reports (ETD)

Current trends in many microelectronic systems show an increased use of microelectromechanical systems (MEMS) to perform a variety of tasks. The increased market for MEMS has led to microsystem technologies being employed in physically demanding environments and safety critical applications. This creates the need for higher degrees of certainty in MEMS operation, especially in systems that contain drive components operating under time varying load conditions. Situations such as these give rise to the need for detailed knowledge of the operational states of MEMS over the lifetime of the device, as well as device fault detection. Accurately obtaining this information by …


Effects Of Electronic Communication On Culture Shock Of Spouses Of International Students, Diana Bennett May 2002

Effects Of Electronic Communication On Culture Shock Of Spouses Of International Students, Diana Bennett

Graduate Theses, Dissertations, and Problem Reports (ETD)

Culture shock is a serious problem for spouses of international students. This recollection study looked at use of telephone, web phone, email, chat, and online newspapers as predictors for culture shock. Fifteen spouses of international students at a mid-Atlantic university were interviewed with the same rated questions asking them to recall how they felt: When they first arrived in the United States, during their first six months here, during their second six months here, during their third six months here, and at the time of the interview. For the same time periods, they were also asked how many times a …


Induction -Year Mentors' Self -Perceptions And Reflections On Their Training And Administrative Support, Joy Rise Cowdery May 2002

Induction -Year Mentors' Self -Perceptions And Reflections On Their Training And Administrative Support, Joy Rise Cowdery

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this qualitative study was to examine how induction-year mentors in Ohio, Pennsylvania, and West Virginia perceived their jobs as mentors, reflected upon their training, and assessed their administrative support. By asking mentors to reflect upon their experiences as trained mentors, administrators may use this information to determine the extent to which what is happening in the field is perceived as effective and valuable by the participants charged with success of the mentoring programs. Mentoring, in this study, was examined through the lens of critical theory to determine if what was experienced by mentors in their training programs …


Assessing The Perceived Impact Of Computer-Assisted Instruction On Physical Therapy Education, Mia L. Erickson May 2002

Assessing The Perceived Impact Of Computer-Assisted Instruction On Physical Therapy Education, Mia L. Erickson

Graduate Theses, Dissertations, and Problem Reports (ETD)

Computer Assisted Instruction (CAI) is becoming more common in allied health education. Research on CAI has provided mixed results. The purpose of this study was to compare uses of CAI in entry-level physical therapist (PT) and physical therapist assistant (PTA) programs. Secondary purposes included determining faculty attitudes toward CAI, determining how faculty select and evaluate CAI, and describing faculty perceptions of CAI and the computer-based licensing exam. Results indicate no significant differences in the amount of CAI in PT and PTA programs. Positive aspects reported include improved knowledge of technology and improved independence with information gathering. Negative aspects reported include …


Factors Related To The Information Needs And Desired Level Of Participation Of Older Women Engaged In Medical Decision Making, Ronald Ralph Martin May 2002

Factors Related To The Information Needs And Desired Level Of Participation Of Older Women Engaged In Medical Decision Making, Ronald Ralph Martin

Graduate Theses, Dissertations, and Problem Reports (ETD)

Previous research suggests that older adults prefer less information and involvement in medical decision-making scenarios than younger adults. No previous research has empirically explored the factors that might influence the information and involvement preferences of older adults in medical decision-making scenarios. The present study involved an investigation of the influence of four factors on information and involvement needs: the complexity of the medical information, cognitive abilities, attitudes toward medical authority and health locus of control beliefs. Complexity was defined by contrasting reading levels (i.e., medical scenarios written at the 4th- vs. 11th-grade reading level). Cognitive abilities were measured using the …


Interpersonal Conflict Within The Context Of The Organization, Jodi Lynn Sauders May 2002

Interpersonal Conflict Within The Context Of The Organization, Jodi Lynn Sauders

Graduate Theses, Dissertations, and Problem Reports (ETD)

This investigation was concerned with individual conflict management styles and situations. Participants were asked to complete the Organizational Communication Conflict Instrument (OCCI) (Putnam & Wilson, 1982) based on a particular conflict with a friend who is not a co-worker and a friend who is a co-worker. Results found that individuals do not change their conflict management styles based on situations. Also considered were the Big Three (Eysenck & Eysenck, 1985) personality types and their relationship to variability in one's conflict management styles. There were no relationships between variability and the Big Three.


Pulse Charging Lead-Acid Batteries To Improve Performance And Reverse The Effects Of Sulfation, Robert B. Cooper May 2002

Pulse Charging Lead-Acid Batteries To Improve Performance And Reverse The Effects Of Sulfation, Robert B. Cooper

Graduate Theses, Dissertations, and Problem Reports (ETD)

When lead-acid batteries are improperly charged or discharged, useful power delivered to loads diminishes. One cause for this is a phenomenon generally referred to as sulfation. One possible method that has been proposed by many to reverse the effects of sulfation is to recharge the lead-acid battery using a pulse charger. To gain a better understanding of the possible benefits of this type of charging, a pulse charger/discharger was constructed. Cycle testing was then done on six pairs of batteries to compare the pulse charged batteries to conventional full-wave rectifier charged batteries. The results of the tests showed that pulse …


Energy Analysis And Diagnostics In Wood Manufacturing Industry, Amol Anant Mate May 2002

Energy Analysis And Diagnostics In Wood Manufacturing Industry, Amol Anant Mate

Graduate Theses, Dissertations, and Problem Reports (ETD)

It would be extremely beneficial if more energy analysis and research is done in wood manufactring (SIC 24). This thesis and research work is concerned with the energy analysis and diagnostics in wood manufacturing industry in West Virginia. This work involves actually conducting site assessments at several lumber and wood manufacturing plants in West Virginia. Using the collected data, we determined energy conservation opportunities and made recommendations. It is important that manufacturers understand the potential for these assessment recommendations with respect to the parameters governing them. Research emphasis is on the demand side management. We found that demand charge plays …


In Vitro Genotoxicity Investigations Of Jet Fuel, Shawna M. Jackman May 2002

In Vitro Genotoxicity Investigations Of Jet Fuel, Shawna M. Jackman

Graduate Theses, Dissertations, and Problem Reports (ETD)

The 60 billion gallons of jet propulsion fuels consumed worldwide create an exposure situation to over two million military and civilian personnel per year. The potential mutagenic, genotoxic and cytotoxic potency of military jet fuel was investigated in this study through in vitro systems such as human peripheral lymphocytes and metabolically competent hepatic cell lines. A battery of genotoxicological evaluations is employed, focusing on the comet assay to examine the induction of DNA damage. Cellular exposures to fuel were carried out directly and indirectly with an ethanol (EtOH) carrier. The fuel was found to be nonmutagenic with and without metabolic …


Use Of Flowable Fill As A Backfill Material Around Buried Pipes, Andrew Ray Simmons May 2002

Use Of Flowable Fill As A Backfill Material Around Buried Pipes, Andrew Ray Simmons

Graduate Theses, Dissertations, and Problem Reports (ETD)

The objective of this research work was to study the performance of flowable fill as a backfill material around buried plastic corrugated pipes. The flowable fill materials used in this study contained varying proportions of fly ash, bottom ash, river sand, waste foundry sand, and cement. The relationships between flowability and compressive strength were investigated for different mixtures by using ASTM test methods in order to design suitable mixtures that meet WVDOT materials specifications. The second phase of the research was to design and construct a laboratory-scale pipe testing apparatus. The final phase was to find the pipe-soil interactions under …


West Virginia University Ceramic Arts Production Studio Program, Jeffrey Stewart Greenham May 2002

West Virginia University Ceramic Arts Production Studio Program, Jeffrey Stewart Greenham

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis is an analysis of West Virginia University's ceramic arts production techniques program, its educational impact, and historical importance.


Random Search Of And-Or Graphs Representing Finite-State Models, David Robert Owen May 2002

Random Search Of And-Or Graphs Representing Finite-State Models, David Robert Owen

Graduate Theses, Dissertations, and Problem Reports (ETD)

Model checking tools have been effective in testing concurrent software represented by communicating finite-state machines. But these tools may require a very large amount of memory. A finite-state model can be translated automatically into a compact AND-OR graph. We use an abductive random search scheme to extract, from the AND-OR graph, information about the execution of the program represented by the original finite-state model.;We use the search to measure testability. For AND-OR graphs representing highly testable programs, we find quickly everything it is possible to find; that is, if the number of unique goals found is plotted, we see a …


Electrical Impedance Of Methane Flat Flame, Jeffrey William Rinker May 2002

Electrical Impedance Of Methane Flat Flame, Jeffrey William Rinker

Graduate Theses, Dissertations, and Problem Reports (ETD)

As part of an ongoing effort to improve emissions and increase efficiency of natural gas fired turbines, this work was undertaken to determine if electrical impedance measurements of the flame are a direct indication of fuel/air ratio. Previous worked measured electrical resistance of the combustion of gases in an atmospheric combustor. From this work, it was conjectured that the complex impedance might provide more information about the flame than using pure resistance. This thesis discusses the measurement of the complex electrical impedance of a Methane Flat Flame Burner. The data shows a relationship between the magnitude of the impedance and …


Small Mammal Communities On A Reclaimed Mountaintop Mine/Valley Fill Landscape In Southern West Virginia, Howard Douglas Chamblin May 2002

Small Mammal Communities On A Reclaimed Mountaintop Mine/Valley Fill Landscape In Southern West Virginia, Howard Douglas Chamblin

Graduate Theses, Dissertations, and Problem Reports (ETD)

Mountaintop mine/valley fill is a large-scale form of strip mining whose effects on small mammals had not previously been examined. Small mammals were captured by Sherman trap and drift fence array (pitfall and funnel traps) on 3 treatments representing the mined landscape and intact forests representing the unmined condition. Peromyscus ( P. leucopus and maniculatus) dominated Sherman captures and were the most common array capture. Eastern chipmunks (Tamias striatus), woodland jumping mice (Napaeozapius insignus), woodland voles (Microtus pinetorum), northern short-tailed shrews (Blarina brevicauda), and pygmy shrews (Sorex hoyi) were more common in forest treatments; Peromyscus, house mice (Mus musculus), southern …