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Graduate Theses, Dissertations, and Problem Reports (ETD)

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Analysis Of Hybrid-Arq Based Relaying Protocols Under Modulation Constraints, Tarik K. Ghanim May 2006

Analysis Of Hybrid-Arq Based Relaying Protocols Under Modulation Constraints, Tarik K. Ghanim

Graduate Theses, Dissertations, and Problem Reports (ETD)

In a seminal paper published in 2001, Caire and Tuninetti derived an information theoretic bound on the throughput of hybrid-ARQ in the presence of block fading. However, the results placed no constraints on the modulation used, and therefore the input to the channel was Gaussian. The purpose of this thesis is to investigate the impact of modulation constraints on the throughput of hybrid-ARQ in a block fading environment. First, we consider the impact of modulation constraints on information outage probability for a block fading channel with a fixed length codeword. Then, we consider the effect of modulation constraints upon the …

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Dewatering Of Fine Coal Slurries By Selective Heating With Microwaves, Aashish Kalra May 2006

Dewatering Of Fine Coal Slurries By Selective Heating With Microwaves, Aashish Kalra

Graduate Theses, Dissertations, and Problem Reports (ETD)

Since water is used extensively in coal preparation and cleaning, dewatering of coals is required prior to shipment to power plants. However, finer fractions of coals are difficult to dewater and consequently these fractions are stored in settling ponds, causing environmental problems and loss of a large fraction of coals. Thermal drying of coals is not an efficient process since hot air heats both coal and water. Mechanical processes for dewatering fine coal slurries have a limit for dewatering coal. Consequently, dewatering using selective heating by conventional microwaves at 2.45 GHz and IR heating at 10 14 Hz was undertaken …

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Models For Calculating Confidence Intervals For Neural Networks, Ashutosh R. Nandeshwar May 2006

Models For Calculating Confidence Intervals For Neural Networks, Ashutosh R. Nandeshwar

Graduate Theses, Dissertations, and Problem Reports (ETD)

This research focused on coding and analyzing existing models to calculate confidence intervals on the results of neural networks. The three techniques for determining confidence intervals determination were the non-linear regression, the bootstrapping estimation, and the maximum likelihood estimation. Confidence intervals for non-linear regression, bootstrap estimation, and maximum likelihood were coded in Visual Basic. The neural network used the backpropagation algorithm with an input layer, one hidden layer and an output layer with one unit. The hidden layer had a logistic or binary sigmoidal activation function and the output layer had a linear activation function. These techniques were tested on …

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Addressing Corner Detection Issues For Machine Vision Based Uav Aerial Refueling, Soujanya Vendra May 2006

Addressing Corner Detection Issues For Machine Vision Based Uav Aerial Refueling, Soujanya Vendra

Graduate Theses, Dissertations, and Problem Reports (ETD)

The need for developing autonomous aerial refueling capabilities for an Unmanned Aerial Vehicle (UAV) has risen out of the growing importance of UAVs in military and non-military applications. The AAR capabilities would improve the range and the loiter time capabilities of UAVs. A number of AAR techniques have been proposed, based on GPS based measurements and Machine Vision based measurements. The GPS based measurements suffer from distorted data in the wake of the tanker. The MV based techniques proposed the use of optical markers which---when detected---were used to determine relative orientation and position of the tanker and the UAV. The …

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Design And Simulation Of Advanced Fault Tolerant Flight Control Schemes, Srikanth Gururajan Jan 2006

Design And Simulation Of Advanced Fault Tolerant Flight Control Schemes, Srikanth Gururajan

Graduate Theses, Dissertations, and Problem Reports (ETD)

This research effort describes the design and simulation of a distributed Neural Network (NN) based fault tolerant flight control scheme and the interface of the scheme within a simulation/visualization environment. The goal of the fault tolerant flight control scheme is to recover an aircraft from failures to its sensors or actuators. A commercially available simulation package, Aviator Visual Design Simulator (AVDS), was used for the purpose of simulation and visualization of the aircraft dynamics and the performance of the control schemes.;For the purpose of the sensor failure detection, identification and accommodation (SFDIA) task, it is assumed that the pitch, roll …

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An Experimental And Computational Investigation Of Dielectrics For Use In Quarter Wave Coaxial Cavity Resonators., Andrew D. Lowery Jan 2006

An Experimental And Computational Investigation Of Dielectrics For Use In Quarter Wave Coaxial Cavity Resonators., Andrew D. Lowery

Graduate Theses, Dissertations, and Problem Reports (ETD)

Emissions from automobiles are becoming more of an environmental concern. Typical measures for controlling emissions, such as variable timing, aftertreatment, and alternative fuels have been investigated. Current research has involved manipulating the ignition inside of the combustion chamber. It has been demonstrated that a plasma flame can be generated from microwaves in a Quarter Wave Coaxial Cavity Resonator (QWCCR). By using this technology, as well as developing an interface to an automobile’s ignition system, it may become possible for researchers to sustain combustion in a modern internal combustion engine. Filling each plasma cavity with a dielectric medium can both alter …

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Minimizing The Makespan In A Flexible Flowshop With Sequence Dependent Setup Times, Uniform Machines, And Limited Buffers, Bret Crowder Jan 2006

Minimizing The Makespan In A Flexible Flowshop With Sequence Dependent Setup Times, Uniform Machines, And Limited Buffers, Bret Crowder

Graduate Theses, Dissertations, and Problem Reports (ETD)

This research addresses the problem of minimizing the makespan in a flexible flowshop with sequence dependent setup times, uniform machines, and limited buffers. A mathematical model was developed to solve this problem. The problem is NP-Hard in the strong sense and only very small problems could be solved optimally. For exact methods, the computation times are long and not practical even when the problems are relatively small. Two construction heuristics were developed that could find solutions quickly. Also a simulated annealing heuristic was constructed that improved the solutions obtained from the construction heuristics. The combined heuristics could compute a good …

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Numerical Modeling Of Deformations Caused By Carbon Dioxide Sequestration In Coal Seams, Xiaochao Tang Jan 2006

Numerical Modeling Of Deformations Caused By Carbon Dioxide Sequestration In Coal Seams, Xiaochao Tang

Graduate Theses, Dissertations, and Problem Reports (ETD)

Atmospheric concentrations of CO2, as the most prevalent greenhouse gas, have been dramatically increased due to the anthropogenic emission mainly from fuel combustion. Geologic sequestration of CO2 in coal seams is an attractive choice to mitigate global CO2 emissions and its consequences. It can also provide secondary benefits such as enhanced coalbed methane production.;Three coal sites from Appalachian basin and Black Warrior basin were selected to numerically study the effects of CO2 injection in coal seams on overburden deformations. Finite element method was used for the analysis of overburden response. The analysis consisted of two phases---CO 2 injection and pore …

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Shoeprint Analysis: A Gis Application In Forensic Evidence, Michael Anthony Walnoha Jr. Jan 2006

Shoeprint Analysis: A Gis Application In Forensic Evidence, Michael Anthony Walnoha Jr.

Graduate Theses, Dissertations, and Problem Reports (ETD)

The overall intent of this study is to illustrate how GIS and crime mapping methods can be applied to forensic evidence to better understand and comprehend spatial patterns that exist in these data. This study bridges common crime mapping principles such as hot spot mapping, exploratory data analysis, and spatial statistics to spatial forensic evidence investigation. In particular, forensic shoeprint evidence is examined and spatial relationships are analyzed using both exploratory and confirmatory statistical analysis. It is found that crime mapping principles can be indirectly related to shoeprint evidence mapping. Exploratory spatial data analysis is extremely helpful in breaking up …

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Asymptotic Solutions Of Almost Diagonal Differential And Difference Systems, Fei Xue Jan 2006

Asymptotic Solutions Of Almost Diagonal Differential And Difference Systems, Fei Xue

Graduate Theses, Dissertations, and Problem Reports (ETD)

New methods for both asymptotic integration of the linear differential systems Y'(t) = [D( t) + R(t)]Y( t) and asymptotic summation of the linear difference systems Y(t + 1) = [D(t)+ R(t)]Y(t) are derived. The fundamental solution Y(t) = phi( t)[I+P(t)] for differential and difference systems is constructed in terms of a product. The first matrix function phi(t) is decided by the diagonal matrix D(t) and the second matrix I + P(t) is a perturbation of the identity matrix I. Another fundamental solution Y( t) = [I + Q(t)]phi( t) is also constructed for difference systems. Conditions are given on …

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Development Of A Small Separation Riser For Fine Coal Particles, Haroon Akhtar Jan 2006

Development Of A Small Separation Riser For Fine Coal Particles, Haroon Akhtar

Graduate Theses, Dissertations, and Problem Reports (ETD)

The wet, density based, separation processes employed at the coal preparation plant do not deal with particles under the size of 150 micrometers, resulting in the waste of precious coal resources. An exploratory fluidized bed riser system was developed to separate pyrite from fine coal particles under 150 micrometers in diameter. Gas velocity U0 and solid mass flux G p were the controlled variables so that the flow pattern within the riser was in the transition region from fast fluidization to dilute regime. Nine tests were conducted using coal and nine tests were conducted using a mixture of 10% iron …

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Some New Methods For Image Compression, Muhammad Aslam Jan 2006

Some New Methods For Image Compression, Muhammad Aslam

Graduate Theses, Dissertations, and Problem Reports (ETD)

The vanishing moment of wavelets and associated multi-resolution framework yield an efficient representation of smooth functions with wavelet approximation. However as pointed out in many papers, the similar result cannot be expected for the piecewise smooth functions with large jumps. In other words, wavelet approximation cannot achieve the same approximation order in the vicinity of jumps as in the smooth regions. Large wavelet coefficients associated with jumps are generated and consequently produce oscillations near discontinuities in the reconstructed signal. This is the so-called Gibbs phenomenon or a Ringing effect. In this thesis, we develop a technique which reduces the Gibbs …

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Examining Problem-Solving Interpretations: The Role Of Age, Sex, And Femininity, Jennifer A. Flinn Jan 2006

Examining Problem-Solving Interpretations: The Role Of Age, Sex, And Femininity, Jennifer A. Flinn

Graduate Theses, Dissertations, and Problem Reports (ETD)

The current study examined age and sex differences in communal interpretations (statements focusing on the needs of others), and whether participants' femininity mediated these differences. One hundred and ninety six participants, 121 younger adults (M=19.26, SD=131: 53 M, 68 F) and 75 older adults (M=73.74, SD=7.65: 36 M, 39 F), were given a vignette regarding a hypothetical job relocation problem that involved either a male or female protagonist. To assess interpretations, participants were asked to indicate all the issues to be considered. The degree to which interpretations reflected communal concerns was coded. Results showed that women had higher communal interpretation …

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Relationship Between Damper Resistance And Damper Insertion Depth, Ranjit Jangam Jan 2006

Relationship Between Damper Resistance And Damper Insertion Depth, Ranjit Jangam

Graduate Theses, Dissertations, and Problem Reports (ETD)

Experiments were performed to determine a predictive model for sliding gate damper resistance (Xdamper). Independent variables included eight ratios of insertion depth (I) to duct diameter (D), two different values of D, four different levels of air velocity, two damper orientations, and two damper edges (Concave/Straight). Analysis of Log (Xdamper) values showed a highly linear relationship with I/D and high statistical significance (p<0.05) for all independent variables and for most two-way interactions. Nearly the entire regression model (R2 = 0.985) was explained by I/D, so all but I/D and Edge were dropped from the final model: Y Log(Xdamper) = -1.434 + 0.089*(Edge) + 4.30*( I/D) (R2 = 0.978). The resulting predictive model: Xdamper = 0.037*10(0.089*(Edge )+4.3*I/D). However error for untransformed Xdamper increased sharply with increasing (I/D) and percent errors were as high as 125% across all values of (I/D). Hence the predictive models are useful for only initial rough adjustment and should be followed by final trial and error adjustment to goal air flow.

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A Translator For Automated Code Generation For Service-Based Systems, Sanjib (Sean) Banerjee Jan 2006

A Translator For Automated Code Generation For Service-Based Systems, Sanjib (Sean) Banerjee

Graduate Theses, Dissertations, and Problem Reports (ETD)

Service based systems are playing a major role in industry today, everything from the verification of credit cards to booking airplane reservations are using some form of a service based approach. This unfortunately brings up a really big problem, how do we know that these services are actually doing what they are supposed to? Or, how do we know the service based system doesn't get somehow compromised when handling sensitive information.;A collaborative project involving Arizona State University and West Virginia University began in 2004 to first create a language, called alpha-calculus. We can prove that the code written in alpha-calculus …

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Student Beliefs And Self-Reported Juvenile Deliquency: A Test Of General Strain Theory, Jacqueline Nicole Canady Jan 2006

Student Beliefs And Self-Reported Juvenile Deliquency: A Test Of General Strain Theory, Jacqueline Nicole Canady

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study is to test Robert Agnew's General Strain Theory. The researcher applied the theory to secondary data of high school sophomores utilizing Educational Longitudinal Survey of 2002. The study sought to understand whether Agnew's strain theory is applicable to high school environments. The findings indicate some support for Agnew's Revised Strain Theory. Conversely, sex is substantially insignificant concerning self-reported juvenile delinquency within schools. Furthermore, without accounting for students' upbringing and socioeconomic background Agnew's General Strain Theory cannot explain differences in race and delinquency. In conclusion, the study suggests further research of Agnew's theory, concerning both race …

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Performance Measurements Of Web Services, Sarita Damaraju Jan 2006

Performance Measurements Of Web Services, Sarita Damaraju

Graduate Theses, Dissertations, and Problem Reports (ETD)

Web services are rapidly evolving application-integration technologies that allow applications in heterogeneous environments to communicate with each other. In this thesis we perform a measurements-based study of an e-commerce application that uses web services to execute business operations. We use the TPC-W specification to generate a session-based workload. The component level response times and the hardware resource usage on the different machines are measured. The component level response times are extracted from the application server logs. From the results it is seen that as the workload increases the response times of the web services components increase. From the hardware resource …

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Honor, Patriarchy, And Disunion: Masculinity And The Coming Of The American Civil War, Kenneth A. Deitreich Jan 2006

Honor, Patriarchy, And Disunion: Masculinity And The Coming Of The American Civil War, Kenneth A. Deitreich

Graduate Theses, Dissertations, and Problem Reports (ETD)

The dissertation explores the nature of antebellum masculinity and its role in bringing on the American Civil War. It focuses its attention on two crucial episodes of the sectional crisis: the attack on Senator Sumner and the Secession Crisis of 1861 and on the four individuals, Preston Brooks, Charles Sumner, Jefferson Davis and Abraham Lincoln, who played prominent roles in those episodes.;Among the issues it explores are the degree to which Northern and Southern ideas of manhood differed and the degree to which Northerners and Southerners associated manhood with sectional identity. Did Southerners associate being a man with being a …

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Shape Based Automated Mapping Of Histological Mouse Brain Sections, Manasa Danda Jan 2006

Shape Based Automated Mapping Of Histological Mouse Brain Sections, Manasa Danda

Graduate Theses, Dissertations, and Problem Reports (ETD)

In the development of an automatic image mapping system for mouse brain images, we focus on obtaining the best match in the two dimensional atlas images for the query image of a mouse brain section. The matching issue has to deal with the tissue distortions and tears, which are routinely encountered and possible scale, rotation and shear changes. With the goal to achieve high performance for image matching, a dual-stage approach is proposed which is based on radial distributions and region-based template matching.;Our main challenge is identifying shape features and corresponding distance metrics that produce effective characterization of 2D sections …

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Design Of Composite Sandwich Panels For Lightweight Applications In Heavy Vehicle Systems, Thomas H. Evans Jan 2006

Design Of Composite Sandwich Panels For Lightweight Applications In Heavy Vehicle Systems, Thomas H. Evans

Graduate Theses, Dissertations, and Problem Reports (ETD)

Vehicle systems such as cargo freight and platform trailers are a primary source of transporting heavy cargo loads. The construction and materials used in a standard trailer design contribute significantly to the overall weight. The U.S. Department of Energy (DOE) and West Virginia University have conducted joint research to reduce the amount of fuel consumption of cargo transportation trailers by initiating a lightweight materials program. This study is aimed at the utilization of Fiber Reinforced Polymer (FRP) composites and Composite Sandwich technology in conjunction with innovative joining concepts to reduce trailer weight. Finite element modeling and experimental analysis reveal the …

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Web Workload Analysis And Session Characterization Using Clustering, Deepak Jha Jan 2006

Web Workload Analysis And Session Characterization Using Clustering, Deepak Jha

Graduate Theses, Dissertations, and Problem Reports (ETD)

Web servers have a significant presence in today's Internet. Corporations want to achieve high availability, scalability, and consistent performance for respective Web systems, maintaining high customer service standards. Web Workload characterization and the analysis of Web log files are the basis on which Web server modeling for efficiency, scalability and availability can be planned. This thesis analyzes the Web access logs of six public Web sites: Department of Computer Science and Electrical Engineering at West Virginia University, West Virginia University, three NASA IVV servers, and Clarknet server. In addition, three private NASA IVV servers are also analyzed.;We characterize sessions using …

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Enlightened Defense: The National Security *Policy Of Thomas Jefferson, Robert R. Leonhard Jan 2006

Enlightened Defense: The National Security *Policy Of Thomas Jefferson, Robert R. Leonhard

Graduate Theses, Dissertations, and Problem Reports (ETD)

The triumph of Thomas Jefferson and the Democratic Republicans in 1800 left the deposed Federalists aghast at what this Francophile, anti nationalist, reputedly atheistic president might do to the country. Despite Jefferson's impulses toward pacifism, national isolation, the diffusion of political power, and healing faction, the eight years of his two administrations were destined to be as calm as a hurricane. The turbulent situation in Europe had already made a mockery of Washington's advice to avoid entanglement, and during Jefferson's presidency, the dangers only increased.;Jefferson's ideas on national security were diametrically opposed to those of Alexander Hamilton and the Federalists. …

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An Investigation Of Supports And Barriers Experienced By Students With Learning Disabilities As They Transition To And Persist In The Postsecondary Setting, Shawn Mahoney Kuba Jan 2006

An Investigation Of Supports And Barriers Experienced By Students With Learning Disabilities As They Transition To And Persist In The Postsecondary Setting, Shawn Mahoney Kuba

Graduate Theses, Dissertations, and Problem Reports (ETD)

This inquiry investigated supports and barriers experienced by students with learning disabilities as they transitioned to, and persisted in, a four-year liberal arts college setting. The goal of the inquiry was twofold: first, to understand from the perspective of the students themselves, the experience of being in and working through the postsecondary environment, especially what facilitates and what obstructs continued participation; and second, to extrapolate from these data, recommendations to inform postsecondary programming for students with learning disabilities.;Over a 3 year period, two cohorts of students with learning disabilities, transition and persistence phase students, volunteered to participate in semi-structured face-to-face …

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Fmri Studies Of Binocular Suppression In Human Amblyopic Subjects, Yuenan Sun Pitrolo Jan 2006

Fmri Studies Of Binocular Suppression In Human Amblyopic Subjects, Yuenan Sun Pitrolo

Graduate Theses, Dissertations, and Problem Reports (ETD)

Binocular suppression has been previously studied psychophysically and with VEPs. Here we used functional magnetic resonance imaging (fMRI) to image activity in visual cortex while human subjects with normal vision or amblyopia experienced binocular integration. One eye viewed a dynamic grating pattern. The other eye viewed one of four stimuli, i.e., black mask, gray mask, or two grating masks that varied in contrast. We observed a luminance masking effect, that is, when the gray mask is compared to the black mask, there was less activation in many retinotopic areas (consistent with previous VEP studies). The result was observed in all …

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Evaluation Of Current And Early Production Electronically Controlled Heavy-Duty Diesel Engine Emissions Based On Fuel Property Differences, Varakala Shashidhar Reddy Jan 2006

Evaluation Of Current And Early Production Electronically Controlled Heavy-Duty Diesel Engine Emissions Based On Fuel Property Differences, Varakala Shashidhar Reddy

Graduate Theses, Dissertations, and Problem Reports (ETD)

Exhaust emissions emitted from heavy-duty diesel engines (HHDE) have been one of the contributors towards air pollution which indirectly have adverse effects on human health. This concern has made regulatory agencies impose stringent emissions standards in the United States and in many other countries. These increasingly stringent exhaust emissions levels have forced the HDDE manufacturers to focus largely on engine technology to reduce emissions levels to meet the regulatory standards.;Diesel fuel properties influence diesel engine emissions but how sensitive the engines are to theses property changes is the objective of this study. To examine the influences, regulated emissions from two …

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Solution Techniques For A Crane Sequencing Problem, Jin Shang Jan 2006

Solution Techniques For A Crane Sequencing Problem, Jin Shang

Graduate Theses, Dissertations, and Problem Reports (ETD)

In shipyards and power plants, relocating resources (items) from existing positions to newly assigned locations are costly and may represent a significant portion of the overall project budget. Since the crane is the most popular material handling equipment for relocating bulky items, it is essential to develop a good crane route to ensure efficient utilization and lower cost. In this research, minimizing the total travel and loading/unloading costs for the crane to relocate resources in multiple time periods is defined as the crane sequencing problem (CSP). In other words, the objective of the CSP is to find routes such that …

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Comparing Mothers And Fathers On Acceptability Of Parent-Training Approaches, Knowledge Of Behavioral Principles, And Parenting Behaviors, Jennifer D. Tiano Jan 2006

Comparing Mothers And Fathers On Acceptability Of Parent-Training Approaches, Knowledge Of Behavioral Principles, And Parenting Behaviors, Jennifer D. Tiano

Graduate Theses, Dissertations, and Problem Reports (ETD)

Although most child research is conducted with mothers as the primary source of data, results often are applied to fathers. Yet, mothers and fathers engage in different interactions with children and may have varying attitudes and knowledge of parenting. This project compared mothers and fathers on a variety of parenting measures. Participants included a community sample of 80 parents (40 mother-father pairs) and their male child between the ages of two and seven. This study evaluated potential differences between mothers and fathers on treatment acceptability, knowledge of behavioral principles, and observed parenting behaviors. Results indicated that mothers prefer response cost …

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A Qualitative Study Of Mcdowell County West Virginia: Exploring Technological Determinism, Technophobia, And Fear As Deterrents Of The Utilization Of Computer Technology In Rural Communities., Christopher Ryan Walls Jan 2006

A Qualitative Study Of Mcdowell County West Virginia: Exploring Technological Determinism, Technophobia, And Fear As Deterrents Of The Utilization Of Computer Technology In Rural Communities., Christopher Ryan Walls

Graduate Theses, Dissertations, and Problem Reports (ETD)

Computers play an important role in our everyday lives. Rural areas are being left behind the digital divide due to the lack of money, infrastructure, and educational resources. The current study will explore the role of fear among individuals who do not utilize computer technology. It will try to better understand the psyche of individuals in rural communities and their opinions about computers. This research will also try to provide solutions on how to narrow the digital divide in rural areas such as McDowell County, West Virginia. This research included an in-depth interview along with a survey regarding computer use …

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Multiagent Autonomous Energy Management, Shilpa B. Ganesh Dec 2005

Multiagent Autonomous Energy Management, Shilpa B. Ganesh

Graduate Theses, Dissertations, and Problem Reports (ETD)

The objective of this thesis is to design distributed software agents for reliable operation of integrated electric power systems of modern electric warships. The automatic reconfiguration of electric shipboard power systems is an important step toward improved fight-through and self-healing capabilities of naval warships. The improvements are conceptualized by redesigning the electric power system and its controls. This research focuses on a new scheme for an energy management system in the form of distributed control/software agents. Multiagent systems provide an ideal level of abstraction for modeling complex applications where distributed and heterogeneous entities need to cooperate to achieve a common …

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Development Of A Vehicle Road Load Model For Ecu Broadcast Power Verification In On-Road Emissions Testing, Nathan A. Moynahan Dec 2005

Development Of A Vehicle Road Load Model For Ecu Broadcast Power Verification In On-Road Emissions Testing, Nathan A. Moynahan

Graduate Theses, Dissertations, and Problem Reports (ETD)

West Virginia University (WVU) has become an industry leader in heavy-duty emissions testing and is continuously improving and updating their testing goals, procedures, and quality. As emissions testing is conducted at WVU in a real-world, on-road environment, engine parameter values are read through the test vehicle's electronic control unit (ECU) and recorded for use in data reductions. One significant value that is recorded by the WVU emissions measurement system is the ECU engine power output. Theses values are recorded and used to report vehicle's brake specific emissions values over a prescribed open-road test route. Because of the fact that the …

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