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Full-Text Articles in Entire DC Network
The Use Of Chickens To Remove The Infective Stage Of Haemonchus Contortus From The Field After Sheep Have Grazed, Jessica Harley Nicole Eddy
The Use Of Chickens To Remove The Infective Stage Of Haemonchus Contortus From The Field After Sheep Have Grazed, Jessica Harley Nicole Eddy
Graduate Theses, Dissertations, and Problem Reports (ETD)
There are few USDA organic certified practices for controlling the nematode Haemonchus contortus. This small ruminant parasite has a life cycle that makes it a candidate for control using field rotations. The third-stage of the nematode's life cycle is responsible for infecting or re-infecting a host and the use of chickens to control H. contortus has not been tested. This experiment was conducted to determine if the chicken's foraging behavior reduces the number of infective third-stage larvae on the pasture by comparing a chicken sub-plot, a sub-plot that was mowed, a control sub-plot and a pretreatment. These forage removal methods …
Hemodynamics Of Intracranial Aneurysms: Factors That May Influence Occurrence, Francisco Adolfo Pino Romainville
Hemodynamics Of Intracranial Aneurysms: Factors That May Influence Occurrence, Francisco Adolfo Pino Romainville
Graduate Theses, Dissertations, and Problem Reports (ETD)
The formation and growth of intracranial aneurysms are partly attributed to various hemodynamic factors, such as the wall shear stress and pressure. However, the exact nature of the hemodynamic variables responsible for triggering aneurismal growth is still unknown. The conclusions drawn by various studies in this regard are found to be speculative and sometimes ambiguous. This issue is further investigated in the present work using some new insight gained from passive scalar dispersion in the blood flow for realistic aneurysm geometries. Intracranial aneurysms are best visualized using selective catheter angiogram technique where a contrast agent added to the blood flow …
Convection-Type Pem Fuel Cell Control System Performance Testing And Modeling, Jeannette M. Hoy
Convection-Type Pem Fuel Cell Control System Performance Testing And Modeling, Jeannette M. Hoy
Graduate Theses, Dissertations, and Problem Reports (ETD)
The PEM (Polymer Electrolyte Membrane) fuel cell is a promising technology for mobile applications because of its compactness, low operating temperature, and quick startup time. The following study evaluates the efficiency of convection type PEM fuel cells by conducting a series of tests on two commercially available fuel cells, and examines each fuel cell's control methods to identify the key factors for the each cell's fuel and air management. The control system affects the stack by purging a dead-ended stack, which stabilizes the performance of the fuel cell by periodically purging the system of contaminants or water building up in …
Organic Management Of Mexican Bean Beetle (Epilachna Varivestis Mulsant) In Snap Bean (Phaseolus Vulgaris L.), Tiffany L. Fess
Organic Management Of Mexican Bean Beetle (Epilachna Varivestis Mulsant) In Snap Bean (Phaseolus Vulgaris L.), Tiffany L. Fess
Graduate Theses, Dissertations, and Problem Reports (ETD)
Various methods have been suggested to control or deter MBB from attacking bean crops, however conclusive data detailing the effectiveness of control methods and their effects on green bean yield are limited. Two separate experiments were performed to compare MBB management practices in snap bean crops and determine snap bean varieties with natural tolerance to MBB infestations. P. foveolatus in snap bean crops significantly (P<0.05) reduced the larval and adult MBB populations, while increasing the bean yield in optimal growing conditions. The use of row cover and staggering of planting date proved to be unsuccessful (P>0.05) increasing bean yield, however MBB larval, pupal, and adult populations were found to be different (P<0.05) when growing conditions wee optimal. When MBB populations were above the economic threshold (1--1.5 MBB larvae per plant) in the test, tolerance to MBB infestation was not observed (P>0.05) in any of the varieties studied.
Statewide Analysis Of Brook Trout (Salvelinus Fontinalis ) Population Status And Reach-Scale Conservation Priorities In West Virginia Watersheds, Jason W. Clingerman
Statewide Analysis Of Brook Trout (Salvelinus Fontinalis ) Population Status And Reach-Scale Conservation Priorities In West Virginia Watersheds, Jason W. Clingerman
Graduate Theses, Dissertations, and Problem Reports (ETD)
The Eastern Brook Trout Joint Venture (EBTJV) was formed to implement range-wide strategies that sustain healthy, fishable brook trout populations. Hudy et al. (2006) recently completed a comprehensive analysis of eastern brook trout distributions representing a critical first step towards fully integrating brook trout conservation efforts in this region. This study was designed to supplement and complement existing data on brook trout distributions and status within West Virginia. We examined recently obtained data for the entire state to update the EBTJV distributional map published in Hudy et al. (2006). We then used fish sample data along with GIS-acquired landscape data …
Direct Suffix Sorting And Its Applications, Fei Nan
Direct Suffix Sorting And Its Applications, Fei Nan
Graduate Theses, Dissertations, and Problem Reports (ETD)
The suffix sorting problem is to construct the suffix array for an input sequence. Given a sequence T[0... n -- 1] of size n = |T|, with symbols from a fixed alphabet Sigma, (|Sigma| ≤ n), the suffix array provides a compact representation of all the suffixes of T in a lexicographic order. Traditionally, the suffix array is often constructed by first building the suffix tree for T, and then performing an inorder traversal of the suffix tree. The direct suffix sorting problem is to construct the suffix array of T directly without using the suffix tree data structure. We …
The Effects Of Fuel Additives On Diesel Engine Emissions During Steady State And Transient Operation, John P. Nuszkowski
The Effects Of Fuel Additives On Diesel Engine Emissions During Steady State And Transient Operation, John P. Nuszkowski
Graduate Theses, Dissertations, and Problem Reports (ETD)
Internal combustion engines have propelled society's transportation and power needs for the last century. However, with the regulatory demand to reduce air pollution, internal combustion engines are a major focus to reduce the emissions from these engines. Compression ignition or diesel engines are a major contributor to NOx and PM pollution. However, the life of these engines is much longer than that of their spark-ignited counterparts, causing the fleet of diesel engines to consist of a significant number of old, higher polluting engines. Fuel additives are one method of reducing emissions and/or enhancing performance in these older diesel engines without …
Solubility Of Endodontic Sealers In Three Common Endodontic Solvents, Ryan W.L. Burleson
Solubility Of Endodontic Sealers In Three Common Endodontic Solvents, Ryan W.L. Burleson
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this study was to compare the solubility of four sealers in three common endodontic solvents at time intervals of five minutes, ten minutes, and twenty minutes. Recently, there has been a growing number of resin endodontic sealers with multiple studies looking at leakage and very few investigating their solubility. Three resin sealers (AH Plus, Epiphany, and EndoREZ) and one Grossman's formula sealer (Roth's 801) were tested with three common endodontic solvents (Chloroform, Eucalyptol, Endosolv-R). All sealers were mixed according to the manufactors' specifications and placed into metal rings with openings of a diameter of twenty millimeters and …
In-Vitro Evaluation Of Dye Leakage Of An Mta Apical Barrier At Varying Setting Times, Mark Daniel Richey
In-Vitro Evaluation Of Dye Leakage Of An Mta Apical Barrier At Varying Setting Times, Mark Daniel Richey
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this study was to compare the dye leakage of an MTA apical barrier after immediate placement, 1 hour, 4 hours, 24 hours, and 1 week of setting time. One hundred twenty single-rooted extracted teeth were accessed and the apical three millimeters resected. The teeth were instrumented with 0.06 tapered Brasseler EndoSequence series rotary instruments to the apex. The same instrument was then placed in the apical opening and advanced to D16, resulting in an apical opening of 1.36mm. The teeth were randomly assigned to the five test groups, and ten teeth each were placed in positive and …
Organic Methods To Control Root Rot Of Peas And Spinach In North-Central West Virginia, Hannah Witten Schrum
Organic Methods To Control Root Rot Of Peas And Spinach In North-Central West Virginia, Hannah Witten Schrum
Graduate Theses, Dissertations, and Problem Reports (ETD)
Root rot disease is a limiting factor in organic production of cool season crops for many growers in North central West Virginia. In attempt to control root rot and its devastating impact on crop stands we decided to study a number of environmental, cultural, and biological control methods. The purpose of this work was to study the effect of alterations of the seed environment on disease incidence (measured by crop emergence and survival 21 days after planting) and thereby define techniques which are suitable for small growers to adopt if they have root rot problems. We therefore explored four broadly …
Essays On Pricing Electricity And Electricity Derivatives In Deregulated Markets, Julia Popova
Essays On Pricing Electricity And Electricity Derivatives In Deregulated Markets, Julia Popova
Graduate Theses, Dissertations, and Problem Reports (ETD)
This dissertation is composed of four essays on the behavior of wholesale electricity prices and their derivatives. The first essay provides an empirical model that takes into account the spatial features of a transmission network on the electricity market. The spatial structure of the transmission grid plays a key role in determining electricity prices, but it has not been incorporated into previous empirical models. The econometric model in this essay incorporates a simple representation of the transmission system into a spatial panel data model of electricity prices, and also accounts for the effect of dynamic transmission system constraints on electricity …
William Blake's Artificial Mythology And Quotations From World Mythos, Teresa L. Cunningham
William Blake's Artificial Mythology And Quotations From World Mythos, Teresa L. Cunningham
Graduate Theses, Dissertations, and Problem Reports (ETD)
The central theme of this thesis is the visual analysis of William Blake's art in connection to the available mythological and religious texts by which Blake constructed his own artificial mythology. This analysis will include explorations into Anglo-Saxon, Germanic, Jewish and Hindu myth as well as Christian and mystic texts. The various works or "books" by Blake will be the visual basis, specifically The Marriage of Heaven and Hell (1790), his later "prophetic" work Jerusalem, the Emanation of the Giant Albion (1820) and his last completed work The Illustrations of the Book of Job (1825). This thesis will affirm that …
Environmental Forensics For Characterization Of Unexploded Ordnance In Soils At The Dolly Sods Wilderness Area, Amy Richmond Aylor
Environmental Forensics For Characterization Of Unexploded Ordnance In Soils At The Dolly Sods Wilderness Area, Amy Richmond Aylor
Graduate Theses, Dissertations, and Problem Reports (ETD)
The West Virginia Maneuver Area includes locations within the Dolly Sods Wilderness Area, the Canaan Valley National Wildlife Recreation Area, and private land holdings in Grant, Randolph, and Tucker counties of West Virginia. Between 1943 and 1944, the military trained troops in a 50,000 acre area which is now the Dolly Sods Wilderness area. This training was conducted by the U.S. Department of the Army and involved artillery and mortar training for troops destined for World War II combat in the mountains of Italy. This project focused on characterization and investigation of the environmental contamination resulting from military ordnance existing …
Measuring Ion Velocity Distribution Functions In A Compact, Expanding Helicon Plasma, Daniel J. Lewis
Measuring Ion Velocity Distribution Functions In A Compact, Expanding Helicon Plasma, Daniel J. Lewis
Graduate Theses, Dissertations, and Problem Reports (ETD)
Laser Induced Fluorescence (LIF) measurements of ion velocity distribution functions (ivdf) in a compact, expanding helicon plasma were limited by optical access and laser power. LIF measurements in the Compact HElicon Waves and Instabilities Experiment (CHEWIE) determined the ivdf of a compact helicon argon plasma as a function of fill pressure, magnetic field, and partial pressure of argon. The LIF scheme used the ring dye laser to 611.662 nm (vacuum wavelength) to pump the Ar II 3d2G9/2 metastable state to the 4p2F7/2 state. The ion decayed to the 4s 2D5/2 level and the fluorescent emission at 460.96 nm was recorded …
Analysis Of Tomato Synthetic Seeds For The Development Of An Optimized Encapsulation System, John E. Porter
Analysis Of Tomato Synthetic Seeds For The Development Of An Optimized Encapsulation System, John E. Porter
Graduate Theses, Dissertations, and Problem Reports (ETD)
In vitro propagules of tomato ( Solanum lycopersicum L.) were used to evaluate the effects of alginate encapsulation and subsequent storage for synthetic seed (synseed) production. Nodal segments were encapsulated in hollow alginate beads with and without supplemental nutrients, auxin (0, 2.5 and 5 muM IBA) and fungicide (0, 50 and 100 muM Daconil 2787). Synseeds were stored for 0, 30 and 90 days at 4+/-1°C in darkness and were given a light treatment (none vs. one week at 25+/-2°C with a 16 hour photoperiod) before sowing in a greenhouse hydroponic system. There was no survival across all treatments of …
Predictive Modeling Of Freshwater Mussels (Unionidae) In The Appalachians, Alison R. Mynsberge
Predictive Modeling Of Freshwater Mussels (Unionidae) In The Appalachians, Alison R. Mynsberge
Graduate Theses, Dissertations, and Problem Reports (ETD)
Freshwater mussels are in decline, particularly in the Appalachian region of North America. This region contains the world's greatest diversity of freshwater mussels, but many species are now threatened or endangered. Little is known of the basic ecology and distributions of species of freshwater mussels relative to other freshwater organisms. The goal of this study was to use predictive modeling to predict distributions of freshwater mussels in the Appalachians and identify correlated factors using a watershed framework. Models were developed in the upper Mid-Atlantic and Ohio drainage regions using subwatersheds and separately in the Tennessee region using catchments. Models developed …
Three Essays On Relationships Between The Public Sector And Population Migration, Robert R. Dunn
Three Essays On Relationships Between The Public Sector And Population Migration, Robert R. Dunn
Graduate Theses, Dissertations, and Problem Reports (ETD)
This dissertation is a collection of papers examining the consequences and determinants of population migration at the state and county level. The first chapter introduces the importance of domestic migration in the United States and briefly presents the issues that are covered in this work. The second chapter focuses on the possibility that state outmigration could result in reduced support of public higher education. Some authors have hypothesized that forward-looking state legislators respond to outmigration of certain age groups by reducing appropriations to higher education. In the empirical model, outmigration is disaggregated into six age groups to examine varying effects …
Delayed Disruption Of Temporally Controlled Behavior, Mirari Elcoro
Delayed Disruption Of Temporally Controlled Behavior, Mirari Elcoro
Graduate Theses, Dissertations, and Problem Reports (ETD)
Delivery of response-independent food during intertrial intervals (ITI) of fixed-interval (FI) schedules was used to examine the resistance to change of temporal control in pigeons. After response rates stabilized on an FI 150 s ITI 135 s, response-independent food was delivered at the beginning of the ITI in one condition and at the end of the ITI in a separate condition (Experiment 1). The ITI then was shortened to 35 s and the same conditions were examined. In Experiment 2, these same conditions were examined, but with responding maintained by an FI 30-s schedule. Differential effects of food location were …
Essays On Evidence And Effects Of International Movements Of Capital And Labor, Sudeshna Pal
Essays On Evidence And Effects Of International Movements Of Capital And Labor, Sudeshna Pal
Graduate Theses, Dissertations, and Problem Reports (ETD)
This dissertation presents three essays on the evidence and effects of international mobility of capital and labor. Essay 1 explores the behavior of this coefficient in OECD countries over a thirty year period. The second and third essays focus on international movements of labor measured by immigration and outsourcing. The second essay theoretically examines the impact of low skill outsourcing on domestic tax rates, namely labor tax and profit tax. The third essay empirically shows the impact of low skilled immigration and outsourcing on labor tax rates in OECD countries. What follows is a summary of the essays.;The first essay, …
Association Of Changes In Norepinephrine And Serotonin Transporter Expression With The Long-Term Behavioral Effects Of Antidepressant Drugs, Zaorui Zhao
Graduate Theses, Dissertations, and Problem Reports (ETD)
The relationship between the ability of repeated antidepressant treatment to cause down-regulation of the norepinephrine and serotonin transporters (NET, SERT) and produce antidepressant-like effects on behavior was determined. Treatment of rats with 15 mg/kg/day desipramine reduced NET expression, measured by 3H-nisoxetine binding and SDS-PAGE/immunoblotting, in cerebral cortex and hippocampus and reduced the time of immobility in the forced-swim test. The antidepressant-like effect on forced-swim behavior was evident two days following discontinuation of desipramine treatment when plasma and brain levels of desipramine and its major metabolite desmethyldesipramine were not detectable. Reduced NET expression resulted in decreased norepinephrine (NE) uptake, measured in …
Cognitive Appraisal Of Perceived Threat Of Diabetes And Adherence To Self -Management Behaviors, Roger D. Carpenter
Cognitive Appraisal Of Perceived Threat Of Diabetes And Adherence To Self -Management Behaviors, Roger D. Carpenter
Graduate Theses, Dissertations, and Problem Reports (ETD)
Background. Within adherence research, health beliefs have been identified as being significant predictors of adherence. Specifically, perceived threat as a health belief has received considerable attention. However, a gap in current knowledge exists in terms of understanding perceived threat of illness as an event that is appraised by the patient.;Aim. The purpose of this exploratory, descriptive study was to examine cognitive appraisal of perceived threat of illness in relation to adherence to self-management behaviors in uninsured/under-insured persons with type 2 diabetes.;Method. A convenience sample consisted of 80 subjects being treated for type 2 diabetes mellitus at a free clinic in …
Methods For Reconstruction Of Transient Emissions From Heavy -Duty Vehicles, Madhava R. Madireddy
Methods For Reconstruction Of Transient Emissions From Heavy -Duty Vehicles, Madhava R. Madireddy
Graduate Theses, Dissertations, and Problem Reports (ETD)
Emissions measurement analyzers give out a response that may not reflect the true instantaneous engine-out emissions. Currently, the heavy-duty diesel engines are being certified for emissions measured in a thirty second time window with certain specification requirements for the analyzers. Since these measured emissions values may not be the same as the true instantaneous emissions, integrated values for the thirty second windows may be affected by analyzer response.;This document presents and examines reconstruction techniques to estimate instantaneous heavy-duty engine-out emissions. These techniques will take as the input, the continuous set of emissions data and approximate dispersion characteristics of the analyzer …
Analysis Of Elementary Teachers' Self-Reports Of Variables Influencing Teacher Decisions During The Special Education Referral Process, Bernard Charles Jones
Analysis Of Elementary Teachers' Self-Reports Of Variables Influencing Teacher Decisions During The Special Education Referral Process, Bernard Charles Jones
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this study was to analyze West Virginia teachers' decision making during the special education referral process. Specifically, the study examined how academic achievement, behavior, socio-economic status, race/ethnicity, and gender impact the teacher's decision to refer students for special education services.;Elementary teachers completed a survey that consisted of questions that allowed them to report on the variables that most influenced their referral decisions. For each survey question, the Spearmen Rho correlation coefficient was used to determine if a correlation existed between individual variables and the teacher's decision to refer a student for special education services. The Mann-Whitney U …
Ultrasound-Assisted Surface-Modification Of Wood Particulates For Improved Wood/Plastic Composites, Wei-Ping Chang
Ultrasound-Assisted Surface-Modification Of Wood Particulates For Improved Wood/Plastic Composites, Wei-Ping Chang
Graduate Theses, Dissertations, and Problem Reports (ETD)
The combined effects of alkali and ultrasound treatment of wood flour on the mechanical properties of polypropylene-based wood/plastic composites (WPCs) were examined. FTIR measurements confirmed that the alkali treatment removed both hemicellulose and lignin from the wood, and there was an increase in the number of hydroxyl groups on the cellulose surface. This process was promoted by the application of ultrasound. Mechanical testing of injection-molded WPC samples revealed that alkali treatment improved both composite strength and modulus when polypropylene grafted with maleic acid was used as a coupling agent. The strength increase is due to improved adhesion between the fiber …
Characterization Of Key Performance Parameters In Dye Sensitized Solar Cells Using A Designed Experiment, Todd Robert Hamrick
Characterization Of Key Performance Parameters In Dye Sensitized Solar Cells Using A Designed Experiment, Todd Robert Hamrick
Graduate Theses, Dissertations, and Problem Reports (ETD)
Inorganic photovoltaic cells have been in production for many years, but the silicon production process is expensive, so solar technology is cost prohibitive for all but niche markets. A more cost effective alternative would open usage of solar power production to more applications and make the cost to produce electricity more affordable. Inorganic solar cells could potentially be the lower cost alternative to conventional solar technology, but efficiency and durability are still not high enough for successful competition.;Other research has investigated how to improve individual aspects of dye sensitized solar cells. This work evaluated six primary factors of material and …
Online Communities' Impact On The Profession Of Newspaper Design, Amanda Miller
Online Communities' Impact On The Profession Of Newspaper Design, Amanda Miller
Graduate Theses, Dissertations, and Problem Reports (ETD)
The importance of the Internet to visual journalists is increasing with every technological progression. Recently online communities have formed, creating a commonplace for creative professionals to meet and share visual work. This study focuses on the possible impact of these emerging online communities on the newspaper design profession. Interviews of newspaper designers who participate in online communities specifically focused on the profession unveiled current and important transformations occurring within the newspaper design profession. Additionally, this study expands on both offline and online community theory, giving qualitative insight into future studies which may focus on the Internet's effects on various professions.
Evaluation Of Current Deck Design Practices, Jeremy M. Meadway
Evaluation Of Current Deck Design Practices, Jeremy M. Meadway
Graduate Theses, Dissertations, and Problem Reports (ETD)
Recent changes in the design code, spurred by previous laboratory studies, have allowed many state agencies to adopt an empirical method for bridge deck design. The empirical method for design takes into account in plane stresses generated by applying load to the deck. These in plane forces, which in traditional design are ignored, act to strengthen the overall response of the deck.;This design procedure has been adopted and employed by the WVDOH as well as many other state agencies. Recent decking issues, specifically extensive full depth cracking, have led to concerns about other bridges in the inventory and future ones …
Design And Testing Of An Independently Controlled Urea-Scr System For Marine Diesel Applications, Derek Johnson
Design And Testing Of An Independently Controlled Urea-Scr System For Marine Diesel Applications, Derek Johnson
Graduate Theses, Dissertations, and Problem Reports (ETD)
Diesel engine emissions for on-road, stationary and marine applications are regulated through new EPA standards. The most difficult species of exhaust gas constituents to reduce are oxides of nitrogen, NOx. The use of urea selective catalytic reduction (SCR) is promising for NO x abatement as a retrofit application. This work focused on the reduction of NOx by use of a stand alone urea injection system, applicable to marine diesel engines. Most current systems communicate with engine controls to predict NOx emissions based on signals such as torque and engine speed. Many marine engines employ mechanical injection technology and lack communication …
Mechanical Characterization Of Fabrics For Inflatable Structures, Juan Cruz Molina Pombo
Mechanical Characterization Of Fabrics For Inflatable Structures, Juan Cruz Molina Pombo
Graduate Theses, Dissertations, and Problem Reports (ETD)
Several mechanical properties of fabrics for inflatable structures have been characterized. In this work, the characterization was done for fabrics in a tunnel plug. As a plug the structure should seal the tunnel and maintain itself static, for that reason the characterization of the frictional system tunnel wall/structure fabric is done. Also, by the study of the maximum stresses under this configuration, the tensile strength of the structural fabrics is studied. In order to characterize the fabric properties, friction and strength, a test for each of them was done.;The tensile strength test was performed for two fabrics, according to the …
Pilot In Loop Assessment Of Fault Tolerant Flight Control Schemes In A Motion Flight Simulator, Girish Kumar Sagoo
Pilot In Loop Assessment Of Fault Tolerant Flight Control Schemes In A Motion Flight Simulator, Girish Kumar Sagoo
Graduate Theses, Dissertations, and Problem Reports (ETD)
This research presents the pilot in the loop tests carried out in a Six-Degree of Freedom (6-DOF) motion flight simulator to evaluate failure detection, isolation and identification (FDII) schemes for an advanced F-15 aircraft. The objective behind this study is to leverage the capability of the flight simulator at West Virginia University (WVU) to carry out a performance assessment of neurally augmented control algorithms developed on a Matlab/Simulink RTM platform. The experimental setup features an interface setup of Gen-2 SimulinkRTM schemes with MOTUS Flight Simulator (MFS). The set up is a close substitute to a real flight and thus is …