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Articles 1 - 30 of 310
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Evaluation Of Performance Graded Asphalt Binder Equipment And Testing Protocol, Michael E. Pumphrey
Evaluation Of Performance Graded Asphalt Binder Equipment And Testing Protocol, Michael E. Pumphrey
Graduate Theses, Dissertations, and Problem Reports
The testing and grading of asphalt cement has progressively changed to meet the demanding needs for quality hot mix asphalt pavements. From October 1987 through March 1993, the Strategic Highway Research Program (SHRP) conducted a {dollar}50 million research effort to improve asphalt pavement technology. The research led to the development of the Superpave(TM) mix design system (Superior Performing Asphalt Pavements) and the Performance Graded (PG) asphalt binder tests and specifications. The Performance Graded asphalt binder specifications were developed to address the shortcomings of the previous asphalt grading systems.;The objective of this research was to critically evaluate the SHRP performance graded …
Simplified Live-Load Moment Distribution Factors For Simple Span Slab On I-Girder Bridges, Wesley D. Hevener
Simplified Live-Load Moment Distribution Factors For Simple Span Slab On I-Girder Bridges, Wesley D. Hevener
Graduate Theses, Dissertations, and Problem Reports
The primary goal of this effort is to identify and assess various methods of computing live load distribution factors and to use the results of laboratory and field tests to compare these methods. It is further a goal of this work to use these methods to perform a parametric study over a wide range of typical slab on steel I-girder bridges to assess the accuracy of both the AASHTO Standard and AASHTO LRFD specifications and to propose an empirical model that correlates better with the analytical results within the range of parameters that are to be studied.;These studies include: (1) …
Standardization Of Test Methods For Property Evaluation Of Frp Bars, Vijay Kumar Tripathi
Standardization Of Test Methods For Property Evaluation Of Frp Bars, Vijay Kumar Tripathi
Graduate Theses, Dissertations, and Problem Reports
The objective of this research is to verify/modify/develop standardized test methods for evaluating mechanical properties of Fiber Reinforced Polymer (FRP) bars by conducting limited complementary tests to determine/verify their mechanical properties. Both short and long-term tests were conducted as a part of this research. Short-term tests included tension, flexure, shear and bond property evaluations. Long-term tests included evaluation of moisture absorption and flexural tests on aged bars. A total of 229 FRP bars with different fibers (carbon, glass and aramid), varying diameters (# 3 to #8) and surface textures (ribbed, sand-coated, and sand-coated with helical wraps) were tested under this …
Gender Stereotypes In Children's Television Commercials And The Effects On Consumer Purchasing Behavior, Joanne G. Asztalos
Gender Stereotypes In Children's Television Commercials And The Effects On Consumer Purchasing Behavior, Joanne G. Asztalos
Graduate Theses, Dissertations, and Problem Reports
This research presents an exploratory investigation on the extent of gender stereotypes portrayed in children's television commercials and the effects on consumer purchasing behavior. The author conducted two studies including a content analysis of viewing 75 children's television commercials, 25 boy, 25 girl, 25 neutral, and documenting evidence of roles, traits, activities, products, speaking parts and settings. Qualitative focus groups were then conducted to correlate the documented gender stereotypes with purchasing behaviors among children between the ages of 6--12. Major findings for this research revealed that there are many gender stereotypes in children's television commercials including the issue that male …
Population Level Dynamics Of Grasshopper Sparrow Populations Breeding On Reclaimed Mountaintop Mines In West Virginia, Frank K. Ammer
Population Level Dynamics Of Grasshopper Sparrow Populations Breeding On Reclaimed Mountaintop Mines In West Virginia, Frank K. Ammer
Graduate Theses, Dissertations, and Problem Reports
During 2001 and 2002, I surveyed three mountaintop mining/valley fill (MTMVF) complexes in southern West Virginia to determine vegetation characteristics important to nest site selection and to estimate nest success for Grasshopper Sparrow populations inhabiting these complexes. I also performed genetic analyses to assess overall population structure, mating system, parentage, kinship, and gender of individuals comprising these populations. A total of 415 grasshopper sparrows were captured and systematic searches of study plots produced 75 active nests. Nest survival for 2001--2002 breeding season (33%) is comparable to survival rates previously reported in the literature. Nest survival rates decreased with increased reclamation …
Empirical Development Of A Scale Of Patience, Kenneth C. Dudley
Empirical Development Of A Scale Of Patience, Kenneth C. Dudley
Graduate Theses, Dissertations, and Problem Reports
Patience is a construct not directly studied in the literature. Studies in the psychological literature have typically spoken of patience only as the converse of impatience. The assumption of these studies is that patience exists in the absence of impatience. However, other research proposes a multidimensional model of patience based on qualitative studies. It follows from the multidimensional model that patience exists on a continuum with the potential for different levels or amounts of patience across different situations. The purpose of this study was to develop an objective measure of patience.;To develop a measure of patience an item pool was …
Aquaculture-Related Stress On Rainbow Trout (Oncorhynchus Mykiss) And Arctic Char (Salvelinus Alpinus), Christopher D. Nelson
Aquaculture-Related Stress On Rainbow Trout (Oncorhynchus Mykiss) And Arctic Char (Salvelinus Alpinus), Christopher D. Nelson
Graduate Theses, Dissertations, and Problem Reports
Recent expansions in aquaculture characterize it as one of the fastest growing segments of the U.S. agricultural sector. Expansion has been facilitated by increased production of many important aquatic species including catfish, salmon, trout, tilapia, shrimp, oysters, and crawfish. West Virginia aquaculture, also an expanding industry, is currently characterized by small-scale, widely dispersed farms. To facilitate future expansion of aquaculture in West Virginia, focuses on product quality as well as production efficiency, identification of limiting factors and investigation into new or alternative management techniques are needed. Objectives of this project were to determine the effects of nitrite and carbon dioxide …
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 …
Years Of Teaching Experience And Descriptions Of Educational Situations, Dana J. Stapleford
Years Of Teaching Experience And Descriptions Of Educational Situations, Dana J. Stapleford
Graduate Theses, Dissertations, and Problem Reports
This study examined the relationship between years of teaching experience and the type of descriptions given of educational situations. Participants were certified teachers with 1 to 27 years of teaching experience and preservice teachers with 0 years of teaching experience. A coding system was developed as an objective method for extracting participants' descriptions of actions and consequences pertaining to student and teacher behavior. Results did not support the original hypothesis that a relationship would be found between years of teaching experience and the descriptions made. However, several other relationships among certain characteristics of the descriptions were found.;The typical description made …
Comparison Of Classification Methods For Perspiration-Based Liveness Algorithm, Sujan T. V. Parthasaradhi
Comparison Of Classification Methods For Perspiration-Based Liveness Algorithm, Sujan T. V. Parthasaradhi
Graduate Theses, Dissertations, and Problem Reports
In the modern world there is a need for security. Biometric technologies provide a means for providing this security. Of the many different available biometric technologies, fingerprint recognition is the most popular. As with all security measures, biometric devices may be subject to attacks on the system. Fingerprint scanners may be susceptible to spoofing using artificial materials, or in the worst case, dismembered fingers. Liveness, i.e. to determine whether the introduced biometric is coming from a live source, has been suggested as a means to circumvent attacks that use spoof fingers. It has been shown that water based casting materials …
Effect Of Rate Of Sumping On Fragmentation Process In Laboratory Rotary Cutting Simulator, Muralidharan Venkataraman
Effect Of Rate Of Sumping On Fragmentation Process In Laboratory Rotary Cutting Simulator, Muralidharan Venkataraman
Graduate Theses, Dissertations, and Problem Reports
This study was done to examine the fragmentation process and to improve sumping. Research has demonstrated that specific energy and specific respirable dust must be kept minimum to produce the optimum parameters of the rock/coal breakage process and to attain maximum sumping. There are three major elements affecting the efficiency of the cutting head namely: (1) Geometry and size of the cutting tool, (2) Geometry of the drum and lacing and arrangements of the tools on the drum and (3) Effect of rate of advance/dynamic impacts. The emphasis is made on the rate of advance utilizing a miniature rotary cutting …
Crack Detection Technique For Reinforced Concrete Bridge Decks, Indumathi Chera
Crack Detection Technique For Reinforced Concrete Bridge Decks, Indumathi Chera
Graduate Theses, Dissertations, and Problem Reports
This study describes the instrumentation and test results of a reinforced concrete bridge deck constructed on 3-span continuous steel girders. The instrumented bridge is located in Evansville, West Virginia at the intersection of US Route 50 East and WV 92 South. An instrumentation system is developed and implemented specifically to measure and monitor the growth of cracks along the wheel path. The system consists of 30 crack-meters embedded in concrete over the bottom layer of the reinforcement. The crack-meter readings are automatically collected every 20 minutes together with the readings from other sensors that were placed in concrete and on …
Ersatz, George M. Horton Jr.
Ersatz, George M. Horton Jr.
Graduate Theses, Dissertations, and Problem Reports
My work attempts to develop the relationship between optical and formal painting traditions in modernism via the literal surface of the painting and the object or objects represented. They are arranged to create an effect of simultaneous emergence and dissolution. They represent the falsely temporal aspects of the perceived world, the concretization of which only exists in the mind of the viewer. This thesis statement will address issues of surface and illusionism in modern pictorial theory and the importance of perception verses objectification. In addition I will discuss the subject matter, composition, and techniques employed to create the works. I …
Dynamic Response Evaluation Of Fiber-Reinforced Composite Bridge Decks And Bridges, Chandra Sekhar Jinka
Dynamic Response Evaluation Of Fiber-Reinforced Composite Bridge Decks And Bridges, Chandra Sekhar Jinka
Graduate Theses, Dissertations, and Problem Reports
Fiber Reinforced Polymer (FRP) composite bridge decks are gaining attention of bridge owners because of their light self weight, corrosion resistance and ease of installation. The lighter weight and lower stiffness of the FRP decks combined with the lower level of damping (than concrete) can lead to excessive deck vibrations and may substantially increase the dynamic amplification of induced stress and deflections. Also, a global NDE technique using dynamic characterization is necessary to ensure the long term performance of FRP bridges. Therefore, an extensive study on FRP decks and FRP bridges is carried out both at laboratory and in the …
Evaluating Runoff Water Quality And Ammonia Volatilization In Three Turkey Litter Application Methods, Michael Dale Shamblin
Evaluating Runoff Water Quality And Ammonia Volatilization In Three Turkey Litter Application Methods, Michael Dale Shamblin
Graduate Theses, Dissertations, and Problem Reports
Poultry litter is an important nutrient source in crop production. However, the traditional practice of broadcasting poultry litter on the soil surface could result in nutrient losses in runoff as well as substantial ammonia volatilization losses, which could adversely affect both the environment and agricultural productivity. This research compared nutrient runoff (natural and simulated) losses on 1 m x 2 m plots and ammonia volatilization from different turkey litter application methods (broadcast, surface-banded, incorporated band, and control) applied in triplicate. No significant differences were observed between any of the treatments in any of the runoff constituents measured. Over three runoff …
Laboratory Experiments In Thermal Sciences, Christopher K. Jackson
Laboratory Experiments In Thermal Sciences, Christopher K. Jackson
Graduate Theses, Dissertations, and Problem Reports
Study of the basic sciences (chemistry, biology, physics, etc.) requires experimental verification to support the theory developed in the classroom. Engineering solutions are the same in their need for verification. In an academic environment this verification comes in the form of laboratory courses. The link to applications is equally important as the demonstration of theory. This is especially true for engineering disciplines due to the nature of tasks engineers are expected to successfully complete in industry. It is vital for the engineer's career that he/she can successfully apply the background theory learned in university study to real world applications.;The Department …
Geologic Feature Prediction Using Roof Bolter Drilling Parameters, Benjamin T. Mirabile
Geologic Feature Prediction Using Roof Bolter Drilling Parameters, Benjamin T. Mirabile
Graduate Theses, Dissertations, and Problem Reports
The design of a safe and efficient roof support system is essential for any underground coal mining operation. All underground coal mines in the United States install roof bolts with a roof bolter as the primary means of supporting the mine roof. Proper application of roof bolting is dependent upon knowledge of the mine roof geology.;Recently developed control and data acquisition technologies allow the drilling performance of these roof bolters to be monitored on a real-time basis. Drilling data collected from these machines can be used to determine geological features present in the mine roof. A J. H. Fletcher & …
Alkaline Durability Tests For E-Glass/Vinyl Ester-Reinforced Polymer With Nanoclay, Shu-Kai Yeh
Alkaline Durability Tests For E-Glass/Vinyl Ester-Reinforced Polymer With Nanoclay, Shu-Kai Yeh
Graduate Theses, Dissertations, and Problem Reports
Two kinds of GFRP (glass fiber reinforced plastics) composite materials were prepared and used in this study. One was E-glass/vinyl ester glass fiber reinforced polymer (plain GFRP) and the other was nano-GFRP prepared with the addition of 1 wt% of CloisiteRTM 10A nanoclay. These samples were aged in an alkaline solution (pH = 13.2) with 3560N (800-lbs), 2225N (500-lbs) and 885N (200-lbs) of sustained load, which were 50%, 31% and 12.5% of the tensile strength, respectively. Time to failure or tensile strength reduction was measured and used to determine durability of the samples in terms of Aging Index, which was …
Distributed Dispatchers For Partially Clairvoyant Schedulers, Kiran S. Yellajyosula
Distributed Dispatchers For Partially Clairvoyant Schedulers, Kiran S. Yellajyosula
Graduate Theses, Dissertations, and Problem Reports
This work focuses on the empirical evaluation of distributed dispatching strategies on shared and distributed memory architectures for hard real-time systems. The dispatching model accommodates process parameter variability and analyzes the effect of variable execution times.;Hard real-time systems are modeled in the E-T-C scheduling framework and dispatched if a valid schedule exists. We examine the dispatchability of Partially Clairvoyant schedules of different sizes and varying deadlines under reasonable assumptions. The effect of scaling up the number of processors used by the dispatcher is also studied. The results validate the superiority of the distributed strategies over sequential dispatching and scalability of …
Reaction Engineering Study Of Natural Gas Hydrate Formation In Special Packed -Bed Reactors By Controlling The Boundary Layer Surfaces Of The Gas -Liquid -Solid Phases, Budhijanto Budhijanto
Reaction Engineering Study Of Natural Gas Hydrate Formation In Special Packed -Bed Reactors By Controlling The Boundary Layer Surfaces Of The Gas -Liquid -Solid Phases, Budhijanto Budhijanto
Graduate Theses, Dissertations, and Problem Reports
Natural gas hydrates (NGH) are crystalline compounds that consist of water and natural gas (NG) molecules. By hydrogen bonds, water molecules form a regular lattice structure containing many cavities. NG molecules occupy the cavities, and therefore stabilize the cavities. NGH are considered to be one of the most potential alternative world energy resources. The applications of NGH in other fields, such as NG purification, storage, and transportation, are also possible. To obtain the full benefits of all the possible applications of NGH, a full understanding of the kinetics of NGH formation is needed.;Strictly speaking, the experimental works of reproducible intrinsic …
Cerulean Warbler Relative Abundance And Frequency Of Occurrence Relative To Large-Scale Edge, Scott B. Bosworth
Cerulean Warbler Relative Abundance And Frequency Of Occurrence Relative To Large-Scale Edge, Scott B. Bosworth
Graduate Theses, Dissertations, and Problem Reports
Cerulean Warblers (Dendroica cerulea) were studied in southwestern West Virginia where the coal mining technique of mountaintop mining/valley fill (MTMVF) continues to perforate large contiguous tracts of deciduous forest. My study objectives were to (1) quantify abundance and probability of occurrence of Cerulean Warblers relative to distance from large-scale edge (defined as reclaimed MTMVF sites) and (2) relate habitat structure and landscape characteristics to the species' probability of occurrence. Cerulean Warbler abundance increased significantly (P < 0.10) with distance from reclaimed mine edge. However, percent occurrence relative to distance from mine edge was not significant, suggesting a degree of tolerance to the large-scale edge created by MTMVF. Abundance was significantly greater on ridges than bottomlands. Percent occurrence did not differ among the three slope positions but followed a trend similar to abundance. Consequently, disturbances such as MTMVF in which ridges are removed may have a greater impact on populations compared to other sources of fragmentation where ridges are not disturbed. Other habitat structure analyses suggest good indicators of Cerulean Warbler presence are the more productive sites on northwest to east facing slopes and low sapling density. Similarly, Cerulean Warbler abundance was positively associated with more productive sites and snag density. Important landscape characteristics positively associated with abundance were large blocks of mature deciduous forest and low edge density. Mountaintop mining/valley fill alters the spatial configuration of forested habitats in southwestern West Virginia, thus creating less suitable habitat and edge effects that negatively affect Cerulean Warbler abundance, occurrence, and distribution in the reclaimed mine landscape.
Characterization Of Point Defects In Nonlinear Optical Materials, Madalina M. Chirila
Characterization Of Point Defects In Nonlinear Optical Materials, Madalina M. Chirila
Graduate Theses, Dissertations, and Problem Reports
Thermoluminescence (TL), optical absorption, and electron paramagnetic resonance (EPR) were used to characterize point defects in LiNbO3 and LiTaO3 Crystals. A broad TL emission, peaking at 440 nm, is observed near 94 K from LiNbO3 when the crystal is irradiated at 77 K and then rapidly warmed. From the LiTaO3 crystals two overlapping TL peaks occur at 94 and 98 K, with each showing a 350-nm maximum in spectral emission. These peaks are observed after 77-K exposure of the crystals to x rays or lasers (266, 325, or 355 nm). During excitation of these crystals at 77 K, holes are …
Investigation Of Initiation Of Reverse Transcription In Retroviruses Using Vectors With Two Primer -Binding Sites, Yegor A. Voronin
Investigation Of Initiation Of Reverse Transcription In Retroviruses Using Vectors With Two Primer -Binding Sites, Yegor A. Voronin
Graduate Theses, Dissertations, and Problem Reports
Initiation of reverse transcription in retroviruses occurs on a specific place in viral genome, called primer-binding site (PBS). Cellular tRNA is annealed to the complementary PBS and is used as a primer. We constructed murine leukemia virus (MLV)-based vectors containing two PBSs, one in normal position and another in the middle of the vector. Green fluorescence protein (GFP) gene was inserted between the two PBSs. The internal PBS was derived from a spleen necrosis virus (SNV), which uses the same tRNA-Pro as a primer. We have shown that the internal PBS was functional for initiation of reverse transcription. Replication of …
Implementing Software Engineering Practices In Small Industry With A Focus On Requirements Elicitation, James Clifford Fleming
Implementing Software Engineering Practices In Small Industry With A Focus On Requirements Elicitation, James Clifford Fleming
Graduate Theses, Dissertations, and Problem Reports
I have been involved in small industry for 33 years and I have seen how the evolution of computers and software has affected small companies striving to grow in their market place by trying to take advantage of an evolving technology. Many times an individual is assigned the task of developing software to fit the company's needs and begins the process without any formal training in the practices of Software Engineering. My Thesis will discuss my evolving skills, gained through my Masters in Software Engineering degree work, as a Software Engineer and how I have been able to implement proper …
Spline Based Controller For Nonlinear Systems, Ali Karimi
Spline Based Controller For Nonlinear Systems, Ali Karimi
Graduate Theses, Dissertations, and Problem Reports
The objective of this thesis is to apply spline theory to implement controllers for nonlinear systems. Two different systems, forced Duffing oscillators and power systems, are investigated. The spline method is used to mimic the controller which drives a state of the Duffing system toward a desired path. The spline-based nonlinear controller has piecewise polynomial segments with different order of polynomials on each segment. Controller efforts for different order of polynomial interpolants and power spectral densities of the controller signals are compared with the exact feedback linearizaton method.;The first objective for power systems is to design nonlinear excitation controllers for …
Plant-Wide Energy Assessment Using A Systems Approach, Rajkumar Selvaraj
Plant-Wide Energy Assessment Using A Systems Approach, Rajkumar Selvaraj
Graduate Theses, Dissertations, and Problem Reports
Energy plays a central role in the operation of the industrialized U.S. economy. Industry is historically the largest consuming sector of the economy with more than 60 percent of the energy consumed for manufacturing. The U.S. chemical industry is the world's largest producer of chemicals producing over 25 percent of the total production worldwide. In a chemical industry, the energy is used to supply heat and power for manufacturing processes and for energy feedstock. Due to the energy intensive nature of chemical industries, energy assessments performed could yield huge savings in energy and cost.;The aim of this research is to …
Evaluation Of Concrete Median Barrier Delineation Under Poor Visibility Conditions, Kari A. French
Evaluation Of Concrete Median Barrier Delineation Under Poor Visibility Conditions, Kari A. French
Graduate Theses, Dissertations, and Problem Reports
A nationwide survey, durability test, and visibility test were conducted for concrete median barrier delineation. PENNDOT was encountering with delineators becoming detached due to harsh conditions in the roadside areas, as well as visibility problems in spot locations prone to fog. From the results of the research it was recommended that in areas prone to poor visibility conditions, PENNDOT consider decreasing the longitudinal spacing and providing delineation lower on the barrier than shown in the standards. With respect to the durability, in instances where the "peel-n-stick" delineators are comparable in price to obtaining the delineator and adhesive separately, that special …
Potential Field Theory And Its Applications To Classical Mechanical Problems, Shannon Rae Stillwagon
Potential Field Theory And Its Applications To Classical Mechanical Problems, Shannon Rae Stillwagon
Graduate Theses, Dissertations, and Problem Reports
Advances in many scientific fields are expected to come from work in nanotechnology. Engineering at nano-scales presents novel problems that classical mechanics cannot solve. Many engineers are uncomfortable designing at this level because classical or continuum mechanics does not apply and quantum mechanics is said to apply in a tangible way. There are unique opportunities to contribute to the design, controls, and analysis of systems that are particularly suited to mechanical engineering. Within the derivations of classical mechanics are assumptions that limit its use to bulk engineering. These assumptions are examined to determine what principles can be extended to smaller …
Ecology And Management Of Raccoons Within An Intensively Managed Forest In The Central Appalachians, Sheldon F. Owen
Ecology And Management Of Raccoons Within An Intensively Managed Forest In The Central Appalachians, Sheldon F. Owen
Graduate Theses, Dissertations, and Problem Reports
The raccoon (Procyon lotor), a generalist meso-predator, is commonly found throughout the eastern United States. Many researchers have examined the ecology and spatial requirements of raccoons in agricultural and wetland areas of the mid-western and southeastern United States. However, no studies have quantitatively examined raccoon habits in the forested central Appalachians and their response to forest management. During the fall of 2000 through the spring of 2003, I monitored the spatial movements and den site selection of raccoons within an intensively managed forest.;I investigated the occurrence of raccoon roundworm (Baylisascaris procyonis) in raccoons (Procyon lotor) within my study area. I …
Analysis Of A Curved Buoyant Jet In An Enclosure Using Les, Allen E. Badeau Jr.
Analysis Of A Curved Buoyant Jet In An Enclosure Using Les, Allen E. Badeau Jr.
Graduate Theses, Dissertations, and Problem Reports
The objective of this study is to investigate curved buoyant jets in an enclosure using Large Eddy Simulation (LES) methods with an Implicit Turbulent Model (ITM). To accomplish this goal, a numerical solver was written, named DREAMRTM, which is capable of solving three dimensional, transient flows using an accurate monotonic and non-oscillatory upwinding scheme. The three-dimensional Navier-Stokes equations are solved in Cartesian coordinates, with the control volume approach being implemented on a staggered grid. The numerical scheme uses a fractional time step method, with the overall spatial and temporal accuracy being second order.;In ITM simulations, there is no explicit subgrid-scale …