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Articles 31 - 60 of 315
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Dietary Feedback Effects And Gender Differences In Stages Of Change For Fat And Fiber Intake Behavior, Janis M. Boury
Dietary Feedback Effects And Gender Differences In Stages Of Change For Fat And Fiber Intake Behavior, Janis M. Boury
Graduate Theses, Dissertations, and Problem Reports
The stages of change (SOC) model has addressed changes people make to important habits such as smoking or diet. This study had three purposes (a) examining the influence of cultural role expectations for males and females on decisional balance (DB), (b) examining changes in stage assignment following feedback for the hidden nutrients of fat and fiber, (c) comparing the effects of feedback and tailored messages on change in fat and fiber intakes.;This study was an experimental control group design with 273 participants at baseline, 235 at intervention, and 197 at post-intervention. Most participants had some college. Baseline included general and …
Temporal Control And Response Strength In A Free -Operant Psychophysical Procedure, Lori M. Lieving
Temporal Control And Response Strength In A Free -Operant Psychophysical Procedure, Lori M. Lieving
Graduate Theses, Dissertations, and Problem Reports
The purpose of the present experiments was to examine the relation between timing and response strength. Pigeons responded on a two-component multiple schedule consisting of the free-operant psychophysical procedure, in which trials lasted 50 s. During the first 25 s of each trial, responding on the left key was reinforced according to a variable interval (VI) schedule of reinforcement. During the second 25 s of each trial, responding on the right key was reinforced according to a VI schedule of reinforcement. In Experiment 1, responding in one component was maintained by a VI 30-s schedule (rich component) and responding in …
Designing A Scalable Dynamic Load -Balancing Algorithm For Pipelined Single Program Multiple Data Applications On A Non-Dedicated Heterogeneous Network Of Workstations, Ashraf Osman
Graduate Theses, Dissertations, and Problem Reports
Dynamic load balancing strategies have been shown to be the most critical part of an efficient implementation of various applications on large distributed computing systems. The need for dynamic load balancing strategies increases when the underlying hardware is a non-dedicated heterogeneous network of workstations (HNOW). This research focuses on the single program multiple data (SPMD) programming model as it has been extensively used in parallel programming for its simplicity and scalability in terms of computational power and memory size.;This dissertation formally defines and addresses the problem of designing a scalable dynamic load-balancing algorithm for pipelined SPMD applications on non-dedicated HNOW. …
Metallothionein Isoform 3 Expression In Human Bladder Urothelium, Seongmi Park
Metallothionein Isoform 3 Expression In Human Bladder Urothelium, Seongmi Park
Graduate Theses, Dissertations, and Problem Reports
The third isoform of metallothionein, MT-3 is shown to have a restricted pattern of tissue distribution with expression confined to the neural tissue. Previous work done by this laboratory has shown that MT-3 is not expressed in the normal bladder but is over-expressed in bladder cancer with levels correlating to the type and grade of tumor. Recently, a new bladder epithelial cell line UROtsa has been characterized that does not express the MT-3 gene and may serve as a useful in vitro model system of the normal human urothelium. The goal of this study was to see the effect of …
Generalized Nowhere Zero Flow, Jingjing Chen
Generalized Nowhere Zero Flow, Jingjing Chen
Graduate Theses, Dissertations, and Problem Reports
Let G be an undirected graph, A be an (additive) abelian group and A* = A - {lcub}0{rcub}. A graph G is A-connected if G has an orientation D(G) such that for every function b : V(G ) A satisfying Sv∈VG b(v) = 0, there is a function f : E(G) A* such that at each vertex v ∈ V(G), ∂f(v), the net flow out from v, equals b( v). An A-nowhere-zero-flow (abbreviated as A-NZF) in G is a function f : E(G) A* such that at each vertex v ∈ V(G), ∂f(v) = 0.;In this paper, we investigate the …
Parametric Modeling Of Bolted Joints Between Components Made Of Particulate Composite Materials, Vasudha Goteti
Parametric Modeling Of Bolted Joints Between Components Made Of Particulate Composite Materials, Vasudha Goteti
Graduate Theses, Dissertations, and Problem Reports
Particulate metal matrix composites (MMC) exhibit higher stiffness, strength and wear resistance compared to metal alloys. They exhibit superior compressive and buckling strength because of their higher plastic modulus. MMC's can operate at very higher temperatures than fiber-reinforced polymer composites. Their isotropic behavior and forming ability by conventional methods makes them a better choice for low-cost applications. They have good thermal conductivity, high electrical conductivity and low thermal expansion.;The main objective of this study is to predict numerically the stress distributions around the hole in a bolted joint made of particulate metal matrix composite and to investigate the associated load …
Characterization Of In-Use Emissions From On-Highway Heavy-Duty Diesel Engines, Mohan Krishnamurthy
Characterization Of In-Use Emissions From On-Highway Heavy-Duty Diesel Engines, Mohan Krishnamurthy
Graduate Theses, Dissertations, and Problem Reports
Class-8 trucks with GVWR of 80,000 lbs were tested on different driving routes and in-use brake-specific emissions of NOx and CO2 data were collected using the West Virginia University's Mobile Emissions Measurement System (MEMS). An uncertainty analysis was performed on the MEMS and it was determined the maximum possible error in the measurement of brake-specific emissions of NOx was 8% and CO2 was 6%.;A modal analysis indicated that the cruise mode comprised 70% of the time that the vehicle spent in the Not-to-Exceed (NTE) zone while the acceleration and deceleration modes about 20% and 10% respectively.;In order to reduce the …
Long-Term Performance Of Pot Hardware In Continuous Galvanizing Lines, Venkatesh Parthasarathy
Long-Term Performance Of Pot Hardware In Continuous Galvanizing Lines, Venkatesh Parthasarathy
Graduate Theses, Dissertations, and Problem Reports
Preliminary comparative wearing tests were conducted on wearguard bearing system against CF3M (casting version of 316L steel), with tungsten carbide laser clad coating, at 30% and 50% production line tension. Tests were also conducted on Stellite 6 against Tribaloy T 400 at 50% production line tension. For each test, periodic measurements of wearing rate, surface microstructure and surface hardness were carried out. An unique dross build-up setup which consists of two sleeves counter rotating against each other was designed to simulate the dross build-up in production line. The chemical composition of the dross material formed and change in sleeve microstructures …
Characterization Of Exhaust Emissions From Catalyzed Trap-Equipped Non-Road Heavy-Duty Diesel Engines, Vinay Nagendran
Characterization Of Exhaust Emissions From Catalyzed Trap-Equipped Non-Road Heavy-Duty Diesel Engines, Vinay Nagendran
Graduate Theses, Dissertations, and Problem Reports
An emissions and engine performance study was conducted to explore the effects of ultra low sulfur fuels on an off-road, heavy-duty engine retrofitted with catalyzed traps. The study was conducted, on an 8 cylinder, mechanically controlled Caterpillar 3408, rear engine of a Scraper. An in-field transient duty cycle was determined by logging the engine speed and torque using an Electronic Control Unit (ECU) communication adapter on the Scraper. The test fuels included California Air Resources Board (CARB) off-road diesel fuel, Fischer-Tropsch and Emission Control Diesel-1 (ECD1) diesel fuels. The engine was retrofit with two different types of diesel particulate filters …
Real-Time Measurement Of Oxides Of Nitrogen From Heavy-Duty Diesel Engines, Aparna Aravelli
Real-Time Measurement Of Oxides Of Nitrogen From Heavy-Duty Diesel Engines, Aparna Aravelli
Graduate Theses, Dissertations, and Problem Reports
New emissions regulations and performance requirements imposed on modern diesel engines encourage the development of improved tools for emissions measurements. This study investigated one of the improved tools for NOx emissions measurement. Objectives of this thesis included measurement, comparison and prediction of NOx emissions from heavy-duty diesel engines using two different NOx analyzers. Steady state and transient tests were conducted on six heavy-duty diesel engines in the WVU Engine and Emissions Research Center (EERC). NOx emissions were measured using a conventional Rosemount NOx analyzer and a Cambustion fast response NOx analyzer. The Rosemount analyzer sampled dilute emissions whereas the fast …
Adding Liveness Detection To The Hand Geometry Scanner, Musat C. Crihalmeanu
Adding Liveness Detection To The Hand Geometry Scanner, Musat C. Crihalmeanu
Graduate Theses, Dissertations, and Problem Reports
In today's dynamic society, the efficiency of the Biometric Systems has an increasing tendency to replace the classic but obsolete keys and passwords. Hand Geometry Readers are popular biometrics used for Access and Control applications. One of their weaknesses is vulnerability to spoofing using fake hands (latex, play-doh or dead-hands).;The objective of this thesis is to design a feature to be added to the Hand Geometry Scanner in order to detect vitality in the hand, reducing spoofing possibilities.;This thesis demonstrates how the Hand Reader was successfully spoofed and shows the implementation of the live detection feature through an inexpensive but …
Evaluation Of 4.75 Mm Superpave Mix Criteria For West Virginia, David Diazgranados Diaz
Evaluation Of 4.75 Mm Superpave Mix Criteria For West Virginia, David Diazgranados Diaz
Graduate Theses, Dissertations, and Problem Reports
The purpose of this research was to evaluate design parameters for 4.75 mm nominal maximum aggregate size mixes, NMAS, in West Virginia. This research was divided in two phases. During Phase I, evaluation of Superpave criteria for 4.75 mm LAMAS mixes, a variety of 4.75 mm NMAS limestone mixes were developed following Superpave methodology for low traffic volume. In Phase II, natural sand evaluation for 4.75 mm mixes; three approved Marshall designs were obtained from the WVDOT. Two of the mixes contained natural sand and the other was a 100 percent limestone mix. The Marshall mix designs were verified and …
Relationship Marketing Elements In Radio Station Websites, Mark L. Atkinson
Relationship Marketing Elements In Radio Station Websites, Mark L. Atkinson
Graduate Theses, Dissertations, and Problem Reports
The purpose of this study is to determine whether or not radio station website designers effectively use relationship marketing to achieve the goals of the stations and their websites. The study is a comparison/content analysis of the websites of 150 radio stations, in three different formats, in the top 50 U.S. population centers. This study compared the results of a content analysis with the results of a 2000 Edison/Arbitron survey which asked respondents to rank 14 website features according to what those replying considered important. This study sought to determine whether the more popular features actually appeared on more websites …
Characterization And Recommendations For The Remediation Of Acid Mine Drainage Impacted Streams, Patrick F. Hudnall
Characterization And Recommendations For The Remediation Of Acid Mine Drainage Impacted Streams, Patrick F. Hudnall
Graduate Theses, Dissertations, and Problem Reports
The Beaver Creek watershed (located in West Virginia) has been severely impacted by Acid Mine Drainage (AMD) from surface mining operations. Water quality was monitored via water quality grab samples, in-situ water quality monitoring devices (YSI Sondes), and fish and macroinvertebrate community sampling. High concentrations of metal ions (Fe, Mn, Al, and SO 4) and acidity along with low pH and alkalinity values were observed from water quality sampling sites. The water quality data collected from the in-situ monitoring devices and fish and macroinvertebrate sampling supported the findings from the water quality grab sampling. Recommendations were made for the remediation, …
Characterization Of New Particulate Mmc Materials And Bolted Joints Through Applicable Astm Standards, Vinu Zacharia Mathew
Characterization Of New Particulate Mmc Materials And Bolted Joints Through Applicable Astm Standards, Vinu Zacharia Mathew
Graduate Theses, Dissertations, and Problem Reports
Particulate reinforced metal matrix composites (PRMMC) comprise a new class of materials whose properties can be adjusted to suit a particular application. The main purpose of producing PRMMC is to achieve lightweight materials with added properties like high stiffness, high ultimate strength and hardness.;In this study we deal with PRMMC manufactured by a novel technology involving the pressure less infiltration of aluminum into a mass of ceramic reinforcement particles. Basic tests like tension test, three point bending test, hardness tests and coefficient of thermal expansion are conducted according to the ASTM standards in order to characterize the material. All these …
Hybrid Neural Networks Models For A Membrane Reactor, Mohammed Al-Yemni
Hybrid Neural Networks Models For A Membrane Reactor, Mohammed Al-Yemni
Graduate Theses, Dissertations, and Problem Reports
Artificial neural networks (ANN) have become an established discipline and have gained extensive interest within chemical engineering. In recent years, research effort has focused on the use of "hybrid artificial neural networks" (HANN) models that combine both the deterministic and the ANN elements. Several methods have been proposed for combining ANN with first principle relations. In this thesis, a new hybrid scheme, which is similar to that developed by Kasprow for a space-independent and time-dependent fed-batch microbial reactor, was developed for a space-dependent steady-state enzymatic reactor. This scheme combines ANN with mass balances and assumed rate expressions. It was shown …
Influence Of Live -Load Deflections On Superstructure Performance Of Slab On Steel Stringer Bridges, Haiyong Wu
Influence Of Live -Load Deflections On Superstructure Performance Of Slab On Steel Stringer Bridges, Haiyong Wu
Graduate Theses, Dissertations, and Problem Reports
High performance steel (HPS), specifically HPS 70W, was introduced to the bridge market in the United States in the late 1990s. With its added strength, greater durability, and improved weldability, HPS allows engineers to design longer and shallower spans, which may increase the live-load deflections. The AASHTO Standard Specification limits live-load deflections to L/800 for ordinary bridges and L/1000 for bridges in urban areas subjected to pedestrian use. Bridges designed by the AASHTO LRFD Specification have an optional deflection limit. Previous research focused on evaluating AASHTO live-load deflection limits showed that the justification for existing deflection limits was not clearly …
Impacts On Terrestrial And Streamside Herpetofauna By Mountaintop Removal Mining In Southern West Virginia, Jennifer Mravintz Williams
Impacts On Terrestrial And Streamside Herpetofauna By Mountaintop Removal Mining In Southern West Virginia, Jennifer Mravintz Williams
Graduate Theses, Dissertations, and Problem Reports
Mountaintop removal mining, a mining technique used in the Appalachian Mountains of West Virginia and nearby states, converts mature forests to grassland and shrub-pole habitats. I sampled terrestrial herpetofauna using drift fences with pitfalls and funnel traps from 2000--2002 to evaluate habitat use of unmined native habitat (intact forest), mined habitat (reclaimed grassland, reclaimed shrub-pole habitat, and fragmented forest), and early successional off-mine habitats that were created by other types of disturbance and were structurally similar to reclaimed grasslands and reclaimed shrubpole habitats. I searched transects in valley fill and reference streams from 2001--2002 to evaluate impacts of valley fill …
Novel Syntheses Of Indoles, Quinoxalines, 2-Quinoxalinones, 2-Alkylbenzimidazoles And Other Heterocycles, Jeffery M. Wallace
Novel Syntheses Of Indoles, Quinoxalines, 2-Quinoxalinones, 2-Alkylbenzimidazoles And Other Heterocycles, Jeffery M. Wallace
Graduate Theses, Dissertations, and Problem Reports
Using a palladium-catalyzed reductive N-heteroannulation method previously discovered in our labs, a 20 mmol synthetic route to methyl indole-4-carboxylate has been developed. Methyl indole-4-carboxylate is synthesized in four steps, with the key step being the reductive cyclization of methyl 2-ethenyl-3-nitrobenzoate in good overall yield. This cyclization method has been modified and applied to the preparation of quinoxalines, 2-quinoxalinones and other heterocyclic compounds. We also propose a possible mechanism for these transformations.;In addition, a novel method to 2-alkylbenzimidazoles has been developed. The thermal reaction of 2-azidonitrobenzenes and various aldehydes give 2-alkylbenzimidazoles generally in moderate yield.
Basic Theory And Experimental Approach To Characterize Flow And Fracture Properties Of Fine Powder Bulk Body, Wiratni Wiratni
Basic Theory And Experimental Approach To Characterize Flow And Fracture Properties Of Fine Powder Bulk Body, Wiratni Wiratni
Graduate Theses, Dissertations, and Problem Reports
This dissertation comprised two parts, which were Part I for the development of a method to characterize the fine powder flow at ambient temperature and Part II for the application of the method in fine powder aeration at elevated temperature.;The analysis conducted on fine powder aeration in Part I was based on the theory of homogeneously-aerated-expanded (HAE) emulsion phase, which viewed a system of aerated fine powders as a quasi-solid single phase.;The original aeration data from an aeration experiment (gas velocity, pressure drop, and bed height) were transformed into the new variables specifically defined for aerated fine powder (powder strain …
Identity Formation Of Adolescents Involved In Selected Structured Activities, Sara A. Drake
Identity Formation Of Adolescents Involved In Selected Structured Activities, Sara A. Drake
Graduate Theses, Dissertations, and Problem Reports
Identity formation is seen as the primary developmental task during adolescence according to Erikson (1968). Adolescents' involvement in structured activities such as extracurricular activity, 4-H, and volunteerism were examined to determine their associations with identity formation. Researcher James Marcia (1966) developed four statuses of identity formation: diffusion, foreclosure, moratorium, and achieved. Categorization in one of the four statuses depends upon the levels of both crisis and commitment. Adolescents who are in the identity-diffused category have had no crisis or made no commitment. Those who foreclose, have made a commitment, but have had no crisis. Moratorium is a state of exploration, …
Seasonal Movements Of Yellow-Phase American Eels ( Anguilla Rostrata) In The Shenandoah River, West Virginia, Stephen D. Hammond
Seasonal Movements Of Yellow-Phase American Eels ( Anguilla Rostrata) In The Shenandoah River, West Virginia, Stephen D. Hammond
Graduate Theses, Dissertations, and Problem Reports
American eels undergo extensive upstream migration in Atlantic coastal river systems. Few studies, however, have focused on movements of large yellow-phase American eels near dams in upper watersheds of Atlantic coastal rivers. We examined relationships between stream flow, water temperature, and lunar phase, and movements of radio-tagged yellow-phase American eels (518--810 mm TL) near Millville hydroelectric dam in the lower Shenandoah River, West. Movements of yellow-phase American eels differed among seasons. Water temperature and stream flow were associated with upstream migration during spring. Downstream movements during fall corresponded with decreasing water temperatures and darker nights near the new moon. Localized …
Development And Validation Of A Measure To Assess Physician Readiness To Prescribe Drug Therapies For Post-Myocardial Infarction Patients, Siddhesh Ajit Kamat
Development And Validation Of A Measure To Assess Physician Readiness To Prescribe Drug Therapies For Post-Myocardial Infarction Patients, Siddhesh Ajit Kamat
Graduate Theses, Dissertations, and Problem Reports
National guidelines recommend the use of beta-blockers, aspirin, and ACE-inhibitors in the management of post MI patients. These target drug classes continue to be under-prescribed; information on physicians' decision-making process requires attention and behavior change interventions have been proposed. This pilot study uses the Transtheoretical Model of Change; physicians' salience for the pros and cons of prescribing target drug classes constitutes the decisional balance measure, which can be used to predict their stage of readiness. A survey instrument was mailed to a sample of West Virginia physicians and 55 usable responses (34%) were received. Majority of the physicians self-reported in …
Enhancing Quality And Extending Shelf Life Of Rainbow Trout (Oncorhynchus Mykiss) By Vitamin E Supplementation And Post-Harvest Antimicrobial Intervention, Nalini Kamireddy
Enhancing Quality And Extending Shelf Life Of Rainbow Trout (Oncorhynchus Mykiss) By Vitamin E Supplementation And Post-Harvest Antimicrobial Intervention, Nalini Kamireddy
Graduate Theses, Dissertations, and Problem Reports
Rainbow trout were fed a control (191 mg/kg) or the control diet supplemented with 5000 mg alpha-tocopherol/kg. Fish were sampled at 2, 3, 4, 5, 7, and 9 weeks of feeding; at each week fillets were evaluated at 0, 7, and 14 d. Supplementation increased fillet alpha-tocopherol content, and TBARS value were not affected. A feeding by storage time interaction was observed for fat content, psychrotrophic counts, cook yield, and shear force. For antimicrobial intervention, fillets were not treated or were dipped in water, 50 ppm ASC, and 1000 ppm ASC for 30 s. Fillets were stored at 1--2°C for …
Winter Habitat Use Of Fishes In The Ohio River, Benjamin Ernst Lenz
Winter Habitat Use Of Fishes In The Ohio River, Benjamin Ernst Lenz
Graduate Theses, Dissertations, and Problem Reports
Winter is a critical period during which fishes may suffer increased mortality. To identify the habitats that fishes use in large rivers during winter conditions, we electrofished six habitat types in the Belleville Pool, Ohio River. We collected the greatest diversity and numbers of fishes in low-velocity tributary confluences when water temperatures were >4°C. When water temperatures were <4°C, certain species were collected in greater abundance in faster-velocity main channel and back channel habitats while other species continued to associate with lower flows in tributary mouths. Differing habitat use between species obscures broad generalizations about when and how fishes use overwintering refuges. In an additional habitat sampled, an embayment, 85% of all fishes collected were juveniles. Centrarchids, rarely collected in the mainstem portion of the river, were one of the dominant fishes collected in the embayment. Protecting large river embayments may prove important for managing recreational sunfish fisheries.
Numerical Analysis Of Source-Water Dynamics For Stream-Bounded Alluvial Aquifers, Sarah E. Webb
Numerical Analysis Of Source-Water Dynamics For Stream-Bounded Alluvial Aquifers, Sarah E. Webb
Graduate Theses, Dissertations, and Problem Reports
Alluvial aquifers bounded by streams are water supply sources for numerous communities in the Ohio Valley, West Virginia. Groundwater flow models are tools for estimation of source areas, however, existing analytical solutions apply only in settings involving a single stream boundary. A series of numerical experiments was devised for wells near multiple surface sources examining the controlling aspects of well-location and boundary condition interaction on source areas. Local-scale models were constructed representing an alluvial aquifer bounded by a tributary intersecting a large river. Aquifer behavior was examined in response to variations in pumping well location and tributary gradient. Flow within …
Pharmaceutical Quality Performance Of Folic Acid Supplements, Islam Rasem Younis
Pharmaceutical Quality Performance Of Folic Acid Supplements, Islam Rasem Younis
Graduate Theses, Dissertations, and Problem Reports
The vitamin folic acid has received considerable attention in the 1990s because of its preventative role against diseases such as neural tube defects, cardiovascular diseases, and psychiatric illness.;A primary concern is the pharmaceutical quality, potency, and efficacy of commercially available folic acid products and label claims. The results showed that there has been significant progress since the 1990's in the improved quality of commercially available folic acid products in meeting USP standards.;Products were also tested in physiologically relevant solutions. Most notably, all the tested products failed to release more than 75% of the active ingredient in 60 minutes in simulated …
Model Predictive Control Design For Load Frequency Control Problem, Nedzad Atic
Model Predictive Control Design For Load Frequency Control Problem, Nedzad Atic
Graduate Theses, Dissertations, and Problem Reports
Load Frequency Control (LFC) is a mechanism by which power generation and power demand are balanced.;Model Predictive Control (MPC) has been widely accepted as a viable control strategy in the process industry. It is a model based control strategy where an optimization procedure is performed in every sampling interval over a prediction horizon, yielding an optimal control action. The optimization criterion, or objective function, is chosen in such a way as to satisfy the controlled system dynamics and constraints, penalize system output deviation from the desired trajectory, and minimize control efforts. Furthermore, a possibility to incorporate economic objectives into the …
Synthesis And Characterization Of Molecularly Imprinted Polymers And Their Application In Preconcentrators For Gas Phase Sensors, Yi Fu
Graduate Theses, Dissertations, and Problem Reports
Various of molecularly imprinted polymers were synthesized by different protocols. Piezoelectric quartz crystals coated with molecularly imprinted polymers were prepared to detect small organic vapors. Hydroquinone (HQ) and Phenol (P) have been used as non-covalent bound templates in order to generate shape-selectivity cavities in the polymer matrix. The recognition film was immobilized on the crystal surface via a pre-coated Poly(isobutylene) layer. The selective behaviors of the imprinted polymer films were studied by their steady-state response to various kinds of small organic vapors. The partition coefficients of polymers toward vapors were evaluated. The imprinted polymers exhibit high sensitivity and selectivity toward …
Utilization Of *Assessment By Maryland Cooperative Extension Faculty, Jennifer Thorn Bentlejewski
Utilization Of *Assessment By Maryland Cooperative Extension Faculty, Jennifer Thorn Bentlejewski
Graduate Theses, Dissertations, and Problem Reports
The research study explored the degree of faculty utilization of assessment practices at the class, program, and institutional levels within the University of Maryland Cooperative Extension. Differences in assessment utilization among faculty of various ranks and disciplines were examined. Faculty perceptions of the benefits and challenges of implementing assessment were also investigated. A quantitative research approach guided the study, which utilized a 78-item survey. Descriptive statistics, multivariate analyses of variance, and analyses of variance were used to analyze the quantitative data. In addition to the survey instrument, a qualitative analysis of data was conducted with regard to learning outcomes and …