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Usage Of Instructional Multimedia To Enhance Interactivity Through Web-Based Learning In P--12 Settings, Sharon L. Teabo
Usage Of Instructional Multimedia To Enhance Interactivity Through Web-Based Learning In P--12 Settings, Sharon L. Teabo
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this study was to analyze multiple media as instructional technologies used to enhance interactivity in a web-based environment and to illustrate the potential for improved learning with interactive multimedia. This study identified instructional media that teachers use, the level of engagement with the media, and determined that there was a correlation between the types and use of instructional media and cognitive level of learning.;Research shows that web-based instruction has the ability to engage learners in real-world tasks. This type of authentic learning has the potential to promote higher order thinking provided students are properly skilled in the …
Cohesive Zone Model For Facesheet -Core Interface Delamination In Honeycomb Frp Sandwich Panels, Weiqiao Wang
Cohesive Zone Model For Facesheet -Core Interface Delamination In Honeycomb Frp Sandwich Panels, Weiqiao Wang
Graduate Theses, Dissertations, and Problem Reports (ETD)
The focus of this dissertation is on developing efficient modeling techniques to study facesheet-core interface delamination in honeycomb fiber-reinforced polymer (HFRP) sandwich panels. Delamination problems are usually treated from a fracture mechanics point of view. However, interface delamination is generally very complex in nature and difficult to solve, because it involves not only geometric and material discontinuities, but also the inherently coupled Mode I, II and III fracture in layered material systems attributed to the well-known oscillatory singularity nature of the stress and displacement field in the vicinity of the delamination crack tip. One of the key issues in this …
Analysis Of Multi-Branch Torsional Vibration For Design Optimization, Yuwen Yao
Analysis Of Multi-Branch Torsional Vibration For Design Optimization, Yuwen Yao
Graduate Theses, Dissertations, and Problem Reports (ETD)
Industries worldwide are rapidly developing advanced complex machinery. One area that must be considered in these engineering systems is torsional vibration for multi-branch and multi-junction systems. If torsional vibrations are not considered, they could lead to early failures and costly repairs to machinery.;Torsional vibration is a type of severe twisting motion due to improperly designed rotation machinery. It usually causes noticeable sound disturbances and potential fatigue problems. Torsional vibration happens when an excitation frequency gets close to the natural frequency of the system. This frequency exists at one or more periods of the operating range in torsional systems. Torsional vibration …
Assessing The Factors Affecting West Virginia Prek--12 Teachers' Use And Non-Use Of Lesson Plans Published On The Internet, Kammi Kai Hefner
Assessing The Factors Affecting West Virginia Prek--12 Teachers' Use And Non-Use Of Lesson Plans Published On The Internet, Kammi Kai Hefner
Graduate Theses, Dissertations, and Problem Reports (ETD)
During the past 10 years, West Virginia PreK--12 schools have received nearly {dollar}14 million to provide teachers with technology-enhanced solutions in meeting the demands of Internet enculturated students. Specifically, these monies were dedicated to educating West Virginia PreK--12 teachers about technology. In some way during that training, these teachers were exposed to the knowledge that lesson plans exist on the Internet.;The first purpose of this study (1) was to build a demographic profile for (a) teachers who were unaware that lesson plans are available on the Internet, (b) teachers who were aware that lesson plans exist on the Internet but …
Mechanisms Of Retroviral Reverse Transcription And Assembly, Sara Kirsten Rasmussen
Mechanisms Of Retroviral Reverse Transcription And Assembly, Sara Kirsten Rasmussen
Graduate Theses, Dissertations, and Problem Reports (ETD)
The work described in these dissertation studies examines three aspects of retrovirus replication and dissects the uncovered phenomena to increase understanding of how retroviruses thrive in complex host environments. The first aspect of replication discussed is the mechanisms behind minus-strand DNA transfer, a crucial step of reverse transcription. We proved for the first time that non-viral sequences can be utilized to carry out this step of the replication process, and that the minus-strand DNA transfer step can be exploited to reconstitute a functional gene in the infected host cell. This finding serves as a proof-of-principle for a new class of …
Evaluation Of Jointed Plain Concrete Pavement (Jpcp) With Frp Dowels, Hui Li
Evaluation Of Jointed Plain Concrete Pavement (Jpcp) With Frp Dowels, Hui Li
Graduate Theses, Dissertations, and Problem Reports (ETD)
Objectives of this study are to evaluate FRP dowel bars as load transferring devices in JPCP under HS-25 static and fatigue loads and compare their response with JPCP consisting of steel dowels. Along with laboratory and field evaluations of JPCP with FRP and steel dowels, analytical modeling of dowel response has been carried out in terms of maximum bending deflection, relative deflection and bearing stress of dowels.;Laboratory tests conducted in this study include static and fatigue load application corresponding to HS-25 load and 1.5 times HS-25 load on concrete slabs (11&inches; and 12&inches; depth) with 1.5&inches; and 1.0&inches; steel and …
Fish Use Of Artificial Dyke Structures In The Kanawha River, West Virginia, Jennifer L. Titus
Fish Use Of Artificial Dyke Structures In The Kanawha River, West Virginia, Jennifer L. Titus
Graduate Theses, Dissertations, and Problem Reports (ETD)
Artificial structures have been used in the past to potentially increase fish production by providing cover, feeding grounds and spawning areas. In some areas the US Army Corp of Engineers has constructed dykes to provide additional habitat for river fishes and to mitigate against navigable related impacts. This study is designed to test whether such structures really function as viable habitats as evidenced by increased abundances relative to natural reference areas lacking structures. Five sets of structures in the Kanawha River, West Virginia were sampled via boat electrofishing using point-abundance sampling twice monthly from June through October 2002 and 2003. …
Modeling The Oriented Strandboard Manufacturing Process And The Oriented Strandboard Continuous Rotary Drying System, John R. Noffsinger
Modeling The Oriented Strandboard Manufacturing Process And The Oriented Strandboard Continuous Rotary Drying System, John R. Noffsinger
Graduate Theses, Dissertations, and Problem Reports (ETD)
Oriented Strand Board (OSB) is the leading structural panel product used in residential building construction. This dissertation describes three models and a statistical process control technique all designed to aid manufacturers to cost effectively manufacture OSB. The first model is an OSB Mill Process Flow Model that defines the processing steps and the desired outcomes. The second model is an OSB Mill Model, an ExcelRTM based computer program, designed to answer operational "what if" and "trade-off" questions. The model is a spreadsheet representation of the OSB production process. The third model is an OSB Dryer Model that predicts the dryer …
Frictional Resistance Of Concrete On A Geocomposite Material, Joshua Bryan Cook
Frictional Resistance Of Concrete On A Geocomposite Material, Joshua Bryan Cook
Graduate Theses, Dissertations, and Problem Reports (ETD)
The frictional resistance provided by the underlying layers of a concrete slabs on ground has a large influence on the cracking behavior. To adequately judge the quality of performance of the slabs, it is imperative to investigate the frictional resistance to movement and other relations of the concrete and sub-layer system. It's also crucial to understand exactly how to introduce a drainage layer to the slab without adversely affecting the cracking pattern of the concrete by dramatically altering the resistance provided by the underlying layers.;Frictional resistance of sub-grade systems which incorporate the geocomposite material Tendrain were tested in a laboratory …
Parametric Modeling And Analysis Of Structural Bonded Joints, Sailaja Malladi
Parametric Modeling And Analysis Of Structural Bonded Joints, Sailaja Malladi
Graduate Theses, Dissertations, and Problem Reports (ETD)
A closed form model of a double lap bonded joint based on the Hart-Smith Model is considered. An extensional link is added to the inner adherend in order to minimize the magnitude of the shear distribution in the adhesive along the overlap length and equations are formulated for this new model. Various parametric studies are performed on the closed form model to observe their effect on the behavior of the shear stress distribution in the adhesive. Overlap length, stiffness of the extensional link, thickness of the adhesive and stiffness of the adherends are varied in the parametric study.;A 2D finite …
Rehabilitation Of Timber Railroad Bridges Using Glass Fiber Reinforced Polymer Composite Wraps, Aaron W. Smith
Rehabilitation Of Timber Railroad Bridges Using Glass Fiber Reinforced Polymer Composite Wraps, Aaron W. Smith
Graduate Theses, Dissertations, and Problem Reports (ETD)
This study involves the rehabilitation and load testing of 50 + year old open deck timber railroad bridges on the South Branch Valley Railroad (SBVR) in Moorefield, WV. The rehabilitation involved repairing substructure elements including a "Pile cap/pile" joint and an above ground pile with Glass Fiber Reinforced Polymer (GFRP) composite wraps, in combination with phenolic formaldehyde adhesives. Static and dynamic testing was performed to determine the dynamic behavior and the live load distribution of the superstructure. This research study is the second phase of a two-phase study with an ultimate objective to investigate the rehabilitation of timber railroad bridges …
Evaluation Of The Compacted Aggregate Resistance Test, Sean P. Rafferty
Evaluation Of The Compacted Aggregate Resistance Test, Sean P. Rafferty
Graduate Theses, Dissertations, and Problem Reports (ETD)
The Compacted Aggregate Resistance (CAR) test is a procedure used to analyze the quality of asphalt. It is a punch shear test that indirectly measures the shape and angularity of fine aggregates. The CAR test is in the developing process of replacing the current Superpave standard for fine aggregate angularity.;The primary objective of this paper is to determine if there is a direct correlation between the results from the CAR test and the quality of asphalt that corresponds to the results from an Asphalt Pavement Analyzer. Currently, there has been good quality Hot Mix Asphalt (HMA) that cannot pass the …
Practical Modern Control Design Techniques For Power Systems, Amer Hasanovic
Practical Modern Control Design Techniques For Power Systems, Amer Hasanovic
Graduate Theses, Dissertations, and Problem Reports (ETD)
This dissertation is proposing practical control design techniques for electric power systems load frequency control (LFC) and stability enhancement through tuning of power system stabilizers (PSSs).;For the LFC, two novel design techniques are developed. The first one, called GALMI, is for tuning the gains of the traditional controllers to obtain a robust performance similar to the one that will be obtained using a centralized high order controller based on H-infinity design and Linear matrix Inequalities (LMI). The tuning is performed using genetic algorithms (GA). The second approach is a controller design based on model predictive control (MPC). This design is …
Software For Efficient File Elimination In Computer Forensics Investigations, Chad Werner Davis
Software For Efficient File Elimination In Computer Forensics Investigations, Chad Werner Davis
Graduate Theses, Dissertations, and Problem Reports (ETD)
Computer forensics investigators, much more than with any other forensic discipline, must process an ever continuing increase of data. Fortunately, computer processing speed has kept pace and new processes are continuously being automated to sort through the voluminous amount of data. There exists an unfulfilled need for a simple, streamlined, standalone public tool for automating the computer forensics analysis process for files on a hard disk drive under investigation. A software tool has been developed to dramatically reduce the number of files that an investigator must individually examine. This tool utilizes the National Institute of Standards and Technology (NIST) National …
Software Architectural Risk Assessment, Ajith Reddy Guedem
Software Architectural Risk Assessment, Ajith Reddy Guedem
Graduate Theses, Dissertations, and Problem Reports (ETD)
Risk assessment is an essential part of the software development life cycle. Performing risk analysis early in the life cycle enhances resource allocation decisions, enables us to compare alternative software architectural designs and helps in identifying high-risk components in the system. As a result, remedial actions to control and optimize the process and improve the quality of the software product can be taken. In this thesis we investigate two types of risk---reliability-based and performance-based risk. The reliability-based risk assessment takes into account the probability of the failures and the severity of failures. For the reliability-based risk analysis we use UML …
Comparison Of Partially Decoupled And Combined Methods Of Path Planning And Task Allocation, Jennifer Beth Hazelton
Comparison Of Partially Decoupled And Combined Methods Of Path Planning And Task Allocation, Jennifer Beth Hazelton
Graduate Theses, Dissertations, and Problem Reports (ETD)
Developing autonomous unmanned aerial vehicles (UAVs) reduces the risks to which soldiers are subjected by enabling the UAVs to make efficient decisions, regardless of the situation. This requires each group of UAVs to be proficient in planning their own paths and assigning tasks in a way that minimizes the total cost of the mission. Two methods are presented for doing this, the partially decoupled approach and the combined approach. After comparing two methods, the partially decoupled approach costs an average of 3.0 meters less than the combined approach, while taking an average of 0.327 seconds longer to complete. This indicates …
Separation Of Small Particles Due To Density Differences In A Cfb Riser System, Jeremy L. Regester
Separation Of Small Particles Due To Density Differences In A Cfb Riser System, Jeremy L. Regester
Graduate Theses, Dissertations, and Problem Reports (ETD)
Common wet density separation processes require large amounts of water, expensive wastewater cleanup, and do not effectively recover fine particles. A circulating fluidized bed riser system was developed as an exploratory system for dry separation by density that will eliminate many problems associated with wet separation. The system sends an air-solid mixture through a vertical riser. The flow pattern in the riser, established by varying gas velocity (Uo) and mass flux (Jp), allowed dense particles to collect at the bottom of the riser while less dense particles were collected through the riser exit at the top. The system was developed …
Comparison Of Path-Planning And Search Methods For Cooperating Unmanned Aerial Vehicles, Zachary Wilson Spritzer
Comparison Of Path-Planning And Search Methods For Cooperating Unmanned Aerial Vehicles, Zachary Wilson Spritzer
Graduate Theses, Dissertations, and Problem Reports (ETD)
The main goal of this research effort is develop a simulation environment for cooperating UAVs within MATLAB's SIMULINK. This is the first step in a process that will eventually lead to the implementation of model UAVs on a model battlefield. The interest in cooperation of UAVs over the past decade has grown significantly. This is due to several reasons including lower operational cost, lower risk for humans, and greater maneuverability.;This research explores two scenarios. The first is a scenario in which all of the characteristics of a battlefield are known prior to the UAVs being launched. Three prevalent path-planning methods …
Forensic Information Management System, Arunshankar Srinivasan
Forensic Information Management System, Arunshankar Srinivasan
Graduate Theses, Dissertations, and Problem Reports (ETD)
The primary objectives of this project were to reduce the paper work, increase data reliability and reduce process turnaround time at the West Virginia State Police Forensic Laboratory (WVSPFL) Charleston, WV. The objective was achieved by reengineering and automating various processes in the seven units of the laboratory. A software tool called Forensic Information Management System (FIMS) was developed. FIMS was implemented in Visual Studio.Net; MS-SQL server was used as the database. The FIMS can be accessed via the internet/intranet, Personal Digital Assistant (PDA), or a stand-alone desktop computer. The key benefits of FIMS are its ability to integrate information …
Evaluation Of Indirect Tensile Strength To Identify Asphalt Concrete Rutting Potential, Geetha Srinivasan
Evaluation Of Indirect Tensile Strength To Identify Asphalt Concrete Rutting Potential, Geetha Srinivasan
Graduate Theses, Dissertations, and Problem Reports (ETD)
The Superpave mix design procedure, as implemented at the end of the Strategic Highway Research Program (SHRP) does not include any testing to evaluate asphalt mixture for resistance to permanent deformation. This prompted the National Cooperative Highway Research Program (NCHRP) to sponsor projects for the development of a simple performance test for rutting potential of asphalt mixtures. Anderson et al. [2003] found that rutting potential can be evaluated by considering indirect tensile strength (IDT), compaction slope measured with the Superpave Gyratory compactor and voids in mineral aggregate (VMA). Anderson evaluated IDT strength at a deformation rate of 3.75 mm/min and …
Modeled Sulfur Dioxide Exposure From A Proposed Coal Fired Power Plant, Using Geographic Information Systems And Air Dispersion Modeling, Steven Jason Hutchens
Modeled Sulfur Dioxide Exposure From A Proposed Coal Fired Power Plant, Using Geographic Information Systems And Air Dispersion Modeling, Steven Jason Hutchens
Graduate Theses, Dissertations, and Problem Reports (ETD)
This study models the contribution of sulfur dioxide (SO 2) from a proposed coal fired power plant (CFPP) above existing ambient levels. Most vulnerable to SO2 exposure appear to be the elderly, young, and diseased, here identified as sensitive receptors (SR). Epidemiologic studies suggest 260mug/m3 as the lowest toxic threshold for SR exposure. It was hypothesized that added SO2 concentrations to existing ambient levels at regional sensitive receptors, under worst case scenario, would not exceed 260mug/m3.;The methods used identify and quantify density locations of localized SR using geographic information systems. Modeled worst case air dispersion concentration exposure to localized SR …
Pic 18f452 Implementation Of Digital Filters, Vikram A. Bose-Mullick
Pic 18f452 Implementation Of Digital Filters, Vikram A. Bose-Mullick
Graduate Theses, Dissertations, and Problem Reports (ETD)
This research hopes to explore the computational limits of the PIC18f452 chip by encompassing the designing and implementation of two types of filters for the PIC 18F452 microcontroller. The main purpose of this research is to implement a floating-point least mean square (LMS) error adaptive filter and its secondary goal is a fixed-point implementation of finite impulse response (FIR) filter. FIR filters are specified via a graphical user interface (GUI) and upon demand, optimized C-language code is generated for the popular CCS PIC C-Compiler. In is the intent of this research to learn whether FIR filters can be made computationally …
Identification Of Technical Barriers And Preferred Practices For Oil Production In The Appalachian Basin, Sandra M. Del Bufalo Paez
Identification Of Technical Barriers And Preferred Practices For Oil Production In The Appalachian Basin, Sandra M. Del Bufalo Paez
Graduate Theses, Dissertations, and Problem Reports (ETD)
The Appalachian Basin is characterized by great number of stripper wells and marginally producing oilfields that face a number of production problems. The purpose of this study was to identify the main problematic issues and preferred solutions for oil production in the Appalachian Basin. Investigation and identification of oil production problems and preferred solutions began with searches in the Society of Petroleum Engineer (SPE) library, and Petroleum Technology Transfer Council (PTTC) website. In addition, journals, workshop, conference were used to find additional information. Formal interviews were arranged with oil producers to gain more insight into problems in the Appalachian Basin. …
Analysis Of The Variation Of Horizontal Stresses And Strains In Bedded Deposits In The Eastern And Midwestern United States, Dennis R. Dolinar
Analysis Of The Variation Of Horizontal Stresses And Strains In Bedded Deposits In The Eastern And Midwestern United States, Dennis R. Dolinar
Graduate Theses, Dissertations, and Problem Reports (ETD)
The variation of the horizontal stress magnitude in bedded deposits in the eastern and Midwestern United States is analyzed with respect to the site depth and the rock elastic modulus using data from 40 sites. For the development of adequate regression models with the elastic modulus, zones with sufficiently uniform strains must be established. A low strain zone encompassing much of the eastern United States and a high strain zone encompassing a portion of southern West Virginia are delineated. In each zone, the regression models with the elastic modulus as the independent variable explains about 85 percent of the maximum …
Design Of A Rodent Dynamometer, Angel M. Dorsch
Design Of A Rodent Dynamometer, Angel M. Dorsch
Graduate Theses, Dissertations, and Problem Reports (ETD)
In the past, computer controlled dynamometers have been used to perform isometric and isovelocity testing to study the effects of velocity, acceleration, and position on muscle injury. However, the effect of constant force on muscle injury in animals has not yet been studied.;A computer-controlled dynamometer was designed which could perform isometric, isovelocity, and isotonic testing on both male and female rats. A mechanical device was designed to position the rats for testing as well as provide a platform for the motor and other system components. All of the system components were connected electrically through a National Instruments UMI-7764 breakout box, …
Fem Simulation Of Ultrasonic Wave Propagation In Solid Rods, Tuan-Chun Fu
Fem Simulation Of Ultrasonic Wave Propagation In Solid Rods, Tuan-Chun Fu
Graduate Theses, Dissertations, and Problem Reports (ETD)
The main objective of this study is to simulate ultrasonic wave propagation in solid cylindrical rods. In this study, both experimental investigations and theoretical analyses are conducted. In the experiment, the 4.2 mm diameter center wire of the commonly used Grad 250 7-wire strand have been employed as the specimen and all the specimens are under zero tensile force. There are 3 rods (center wire) of different lengths used in this study. The DS345 arbitrary function generator, PICO sensors, and S9208 displacement transducer is used for measuring the results of the ultrasonic wave propagations. In the FEM analyses, each specimen …
Development Of Gas Production Type Curves For Coalbed Methane Reservoirs, Anangela Garcia Arenas
Development Of Gas Production Type Curves For Coalbed Methane Reservoirs, Anangela Garcia Arenas
Graduate Theses, Dissertations, and Problem Reports (ETD)
Coalbed methane is an unconventional gas resource that consists on methane production from the coal seams. The unique coal characteristic results in a dual-porosity system. CBM reservoir performance is also influenced by the interrelationship of reservoir, geologic, and operation parameters. Coalbed methane production data is considered a complex and difficult to analyze especially at the early stages of the recovery.;This study was conducted to develop a simple and reliable tool to predict the performance of CBM in The Northern Appalachian Basin. To achieve this objective, four steps were performed. A unique set of gas production type curves for coalbed methane …
Characterization Of In-Use Emissions From Marine Engines, Sam George
Characterization Of In-Use Emissions From Marine Engines, Sam George
Graduate Theses, Dissertations, and Problem Reports (ETD)
Recently, exhaust emissions from marine engines have become a cause of growing concern. Emission reduction technologies applicable to marine engines need to be developed and tested so that the emission regulations can be met. A review of emission reduction technologies applicable for marine engines is presented in this study. The experimental results of onboard testing of a high-speed passenger ferry to determine the benefits of low sulfur diesel (LSD) fuel and intake air water injection are presented. Gaseous emissions of oxides of nitrogen (NOx), carbon dioxide (CO2), and particulate matter (PM) emissions were measured using on-board emission measurement systems developed …
Breaking Boundaries, Juan Giraldo
Breaking Boundaries, Juan Giraldo
Graduate Theses, Dissertations, and Problem Reports (ETD)
Graphic design communication is in constant change. Everyday new technologies emerge and evolve, affecting the way we communicate and deliver messages. For this reason, graphic designers should be able to understand the basic principles of design and effectively apply them to any media. It is my intention with this thesis to analyze the way I work in the design process, my influences, and also, why I make specific decisions based on different media. To illustrate these concepts I will discuss the body of work presented in my thesis exhibition: Breaking Boundaries.
A General Method For Genome Search And Discovery., Yue Jiang
A General Method For Genome Search And Discovery., Yue Jiang
Graduate Theses, Dissertations, and Problem Reports (ETD)
The increasing amount of easily available genomic data has heightened the importance of computational tools in the analysis genome databases, especially the human genome. In this study, we develop a new methodology based on the suffix tree data structure to identify unknown targets of gene families. We use the identification of hypoxia-inducible factor 1 (HIF-1) as a model system. HIF-1 is important in human normal physiological functions and in many human diseases such as cancer and cardiovascular diseases. We selected 17 known HIF-1 target gene sequences as a training set. We use the suffix tree data structure to extract a …