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Graduate Theses, Dissertations, and Problem Reports (ETD)

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Analytical And Computational Study Of Flame Acceleration In Tubes: Effect Of Wall Friction, Berk Demirgok Dec 2013

Analytical And Computational Study Of Flame Acceleration In Tubes: Effect Of Wall Friction, Berk Demirgok

Graduate Theses, Dissertations, and Problem Reports (ETD)

Premixed flame acceleration is especially strong in the case of flame propagation in tubes or channels. Being a reasonably simple configuration to investigate fundamental flame properties, combustion tubes have numerous practical applications such as safety issues in mines, subways and power plants. This work is devoted to the analytical formulation and computational simulations of premixed flame acceleration induced by wall friction in tubes/channels. Specifically, the evolution of the flame dynamics and morphology is determined, and the main characteristics of the flame acceleration such as the flame shape and propagation speed, the acceleration rate as well as the combustion-generated velocity profile …

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Determining Transportation And Development Impacts Of Consolidated Schools In West Virginia, Bradley J. Dicola Dec 2013

Determining Transportation And Development Impacts Of Consolidated Schools In West Virginia, Bradley J. Dicola

Graduate Theses, Dissertations, and Problem Reports (ETD)

School consolidation has become commonplace in the West Virginia, with a declining student population as West Virginia has lost population over the last several decades. Consolidated schools offer school districts the opportunity to provide greater offerings in terms of coursework and extracurricular activities, while also allowing a reduction in some operating costs since fewer facilities are maintained and few administrative staff are needed to operate them. Consolidation also has impacts on school transportation, both in terms of time and mode choice, as well as the impact on land use patterns around the consolidated school facility.;This research seeks to help quantify …

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Modeling And Recognizing Binary Human Interactions, Ke Feng Dec 2013

Modeling And Recognizing Binary Human Interactions, Ke Feng

Graduate Theses, Dissertations, and Problem Reports (ETD)

Recognizing human activities from video is an important step forward towards the long-term goal of performing scene understanding fully automatically. Applications in this domain include, but are not limited to, the automated analysis of video surveillance footage for public and private monitoring, remote patient and elderly home monitoring, video archiving, search and retrieval, human-computer interaction, and robotics. While recent years have seen a concentration of works focusing on modeling and recognizing either group activities, or actions performed by people in isolation, modeling and recognizing binary human-human interactions is a fundamental building block that only recently has started to catalyze the …

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Wind And Wake Sensing With Uav Formation Flight: System Development And Flight Testing, Trenton Jameson Larrabee Dec 2013

Wind And Wake Sensing With Uav Formation Flight: System Development And Flight Testing, Trenton Jameson Larrabee

Graduate Theses, Dissertations, and Problem Reports (ETD)

Wind turbulence including atmospheric turbulence and wake turbulence have been widely investigated; however, only recently it become possible to use Unmanned Aerial Vehicles (UAVs) as a validation tool for research in this area. Wind can be a major contributing factor of adverse weather for aircraft. More importantly, it is an even greater risk towards UAVs because of their small size and weight. Being able to estimate wind fields and gusts can potentially provide substantial benefits for both unmanned and manned aviation. Possible applications include gust suppression for improving handling qualities, a better warning system for high wind encounters, and enhanced …

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Analog Signal Buffering And Reconstruction, Brandon M. Kelly Aug 2013

Analog Signal Buffering And Reconstruction, Brandon M. Kelly

Graduate Theses, Dissertations, and Problem Reports (ETD)

Wireless sensor networks (WSNs) are capable of a myriad of tasks, from monitoring critical infrastructure such as bridges to monitoring a person's vital signs in biomedical applications. However, their deployment is impractical for many applications due to their limited power budget. Sleep states are one method used to conserve power in resource-constrained systems, but they necessitate a wake-up circuit for detecting unpredictable events. In conventional wake-up-based systems, all information preceding a wake-up event will be forfeited. To avoid this data loss, it is necessary to include a buffer that can record prelude information without sacrificing the power savings garnered by …

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Emotional Intelligence And Deans: Exploring The Nature Of The Emotional Intelligence Of Community College Deans In The Southeastern Region Of The United States, Irene Kasungwa Maundu Aug 2013

Emotional Intelligence And Deans: Exploring The Nature Of The Emotional Intelligence Of Community College Deans In The Southeastern Region Of The United States, Irene Kasungwa Maundu

Graduate Theses, Dissertations, and Problem Reports (ETD)

Leadership is an essential aspect of community college administration. Community colleges are currently facing numerous challenges such as: above average retirement rates for administrators, funding and limited government support, diverse student populations, changes in technology, shift in teaching to student-centered learning, and steep competition. The purpose of this study was to understand the nature of the emotional intelligence of community college deans within the southeastern region of the United States of America. I used the Mayer-Salovey-Caruso Emotional Intelligence Test (MSCEIT) to measure the emotional intelligence scores of community college deans, and a demographic questionnaire for the demographic variables. Public community …

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The Evolution Of The Paleopolyploid Genome In Family Salicaceae, Eli Rodgers-Melnick Aug 2013

The Evolution Of The Paleopolyploid Genome In Family Salicaceae, Eli Rodgers-Melnick

Graduate Theses, Dissertations, and Problem Reports (ETD)

Whole genome duplication is a recurrent phenomenon throughout the history of flowering plants, with at least 1 occuring in the history of each angiosperm lineage. However, following duplication the genome typically undergoes a period of increased structural rearrangements and gene loss, resulting in a diploidized genome with large stretches of syntenic regions resulting from the duplication. This process, termed fractionation, often exhibits biased patterns of gene retention, which appear to correspond with the putative connectedness of genes within biological networks. In this thesis, I explore the extent to which the same biases appear in duplicate genes from the most recent …

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An Investigation Of Traveling-Wave Electrophoresis Using A Trigonometric Potential, James Vopal Aug 2013

An Investigation Of Traveling-Wave Electrophoresis Using A Trigonometric Potential, James Vopal

Graduate Theses, Dissertations, and Problem Reports (ETD)

Traveling-wave electrophoresis, a technique for microfluidic separations in lab-on-achip devices, is investigated using a trigonometric model that naturally incorporates the spatial periodicity of the device. Traveling-wave electrophoresis can be used to separate high-mobility ions from low-mobility ions in forensic and medical applications, with a separation threshold that can be tuned for specific applications by simply choosing the traveling wave frequency. Our simulations predict plateaus in the average ion velocity verses the mobility, plateaus that correspond to Farey fractions and yield Devil's staircases for non-zero discreteness values. The plateaus indicate that ions with different mobilities can travel with the same average …

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Sensitivity And Stability Analysis Of Nonlinear Kalman Filters With Application To Aircraft Attitude Estimation, Matthew Brandon Rhudy Aug 2013

Sensitivity And Stability Analysis Of Nonlinear Kalman Filters With Application To Aircraft Attitude Estimation, Matthew Brandon Rhudy

Graduate Theses, Dissertations, and Problem Reports (ETD)

No abstract provided.

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Development Of An Integrated Intelligent Multi -Objective Framework For Uav Trajectory Generation, Jennifer Nicole Wilburn Aug 2013

Development Of An Integrated Intelligent Multi -Objective Framework For Uav Trajectory Generation, Jennifer Nicole Wilburn

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis explores a variety of path planning and trajectory generation schemes intended for small, fixed-wing Unmanned Aerial Vehicles. Throughout this analysis, discrete and pose-based methods are investigated. Pose-based methods are the focus of this research due to their increased flexibility and typically lower computational overhead.;Path planning in 3 dimensions is also performed. The 3D Dubins methodology presented is an extension of a previously suggested approach and addresses both the mathematical formulation of the methodology, as well as an assessment of numerical issues encountered and the solutions implemented for these.;The main contribution of this thesis is a 3-dimensional clothoid trajectory …

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Wellbore Stability In Ultra-Deep Formations Of The Gulf Of Mexico, Gbenga Kayode Aug 2013

Wellbore Stability In Ultra-Deep Formations Of The Gulf Of Mexico, Gbenga Kayode

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis work looks into Horizontal wellbore integrity or stability in the Mars Ursa Basin of the Gulf of Mexico using different geo-mechanical properties of this highly producing formation in analyzing stress build up both around the producing wells as well as the producing formations. Different cases were analyzed using the CMG simulator where consideration was given to cases of single as well as multiple producing horizontal wells. The model built considered both the basic reservoir model as well as geo-mechanical models. The individual cases considered included different geomechanical properties of the producing formation these properties however include frictional angle, …

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Discrete Time Dynamic Traffic Assignment Models With Lane Reversals For Evacuation Planning, Yeh-Ern Poh Aug 2013

Discrete Time Dynamic Traffic Assignment Models With Lane Reversals For Evacuation Planning, Yeh-Ern Poh

Graduate Theses, Dissertations, and Problem Reports (ETD)

In an event of a natural or man-made disaster, an evacuation is likely to be called for to move residents away from potentially hazardous areas. Road congestion and traffic stalling is a common occurrence as residents evacuate towns and cities for safe refuges. Lane reversal, or contra-flow, is a remedy to increase outbound flow capacities from disaster areas which in turn will reduce evacuation time of evacuees during emergency situations. This thesis presents a discrete-time traffic assignment system with lane reversals which incorporates multiple sources and multiple destinations to predict optimal traffic flow at various times throughout the entire planning …

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Distributed Joint Sensor And Target Location Estimation, Muammar Ali Aug 2013

Distributed Joint Sensor And Target Location Estimation, Muammar Ali

Graduate Theses, Dissertations, and Problem Reports (ETD)

The area of wireless sensor networks (WSN) is a fast growing area and has a variety of applications such as environmental monitoring, health care, agricultural applications, and military applications. While this research area has been active since 1980s, new applications bring new constraints, and these lead to new open problems. This thesis approaches one of them. It focuses on the problem of target location estimation with limited knowledge about sensor locations in a WSN. Sensors in a WSN are randomly deployed over a known area. The true locations of the sensors are unknown, but each sensor node is equipped with …

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The Effect Of Surgical Guides On Heat Generation During Guided Implant Surgery: An In Vitro Study, Safa Tahmasebi Aug 2013

The Effect Of Surgical Guides On Heat Generation During Guided Implant Surgery: An In Vitro Study, Safa Tahmasebi

Graduate Theses, Dissertations, and Problem Reports (ETD)

Purpose: The purpose of this in vitro study was to evaluate the heat generated in bone by one implant drill system with and without using surgical drill guides. Temperature elevation during guided surgery was compared to that of conventional drilling in bovine femur specimens. Significant differences in temperature elevation between conventional osteotomy and guided surgical osteotomy were examined.;Materials and Methods: Conventional and Surgically guided osteotomies were performed in 117 randomized measurements with K type thermocouples in an in-vitro study using bovine cortical bone. Using an internally and externally irrigated implant system, intermittent drilling at 2- second intervals at a constant …

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Development Of Carbonaceous Chemistry For Computational Modeling (C3m) With Application Of Uncertainty Quantification (Uq) Analysis For Coal Gasification Kinetics In Computational Fluid Dynamics (Cfd) Modeling, Kiran P Chaudhari Aug 2013

Development Of Carbonaceous Chemistry For Computational Modeling (C3m) With Application Of Uncertainty Quantification (Uq) Analysis For Coal Gasification Kinetics In Computational Fluid Dynamics (Cfd) Modeling, Kiran P Chaudhari

Graduate Theses, Dissertations, and Problem Reports (ETD)

In association with Department of Energy.s National Energy Technology Laboratory (NETL), a software platform entitled Carbonaceous Chemistry for Computational Modeling (C3M) that can access a variety of kinetic processes and reaction mechanisms typically found in coal gasification, gas clean-up, and carbon capture processes, has been developed to overcome the limitations in terms of applicable operating conditions and fuel types. It interfaces with CFD software such as Multiphase Flow with Interphase Exchanges (MFIX) developed at NETL, ANSYS-FLUENT by ANSYS Inc., and BARRACUDA by CPFD Software and provides relevant parameters to simulate chemical kinetics and/or to replicate laboratory data. The reaction kinetics …

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Essays On Resource Allocation And Energy Commodity Markets, Oleg Kucher Aug 2013

Essays On Resource Allocation And Energy Commodity Markets, Oleg Kucher

Graduate Theses, Dissertations, and Problem Reports (ETD)

The dissertation consists of three essays directed towards energy resource allocation on micro-, regional- and macro- levels: 1. Economic Analysis of Coal and Biomass to Liquids Investment Decisions, 2. Spatial Dependence in Wholesale Gasoline Markets across the United States, and 3. Energy Prices, Inventory and the Business Cycle. The first dissertation essay entitled "Economic Analysis of Coal and Biomass to Liquids (CBTL) Investment Decisions" examines the economic feasibility of converting coal and biomass into liquid fuels in the U.S. The study investigates the investment decisions into the CBTL technology under fuel price uncertainty. The CBTL technology scenario draws upon the …

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When The Sacred Hurts: Using Grounded Theory Analysis To Understand How Former Members Experienced Abuse Of Religious Authority In Christian Groups, Karianne D. P. Bilsky Aug 2013

When The Sacred Hurts: Using Grounded Theory Analysis To Understand How Former Members Experienced Abuse Of Religious Authority In Christian Groups, Karianne D. P. Bilsky

Graduate Theses, Dissertations, and Problem Reports (ETD)

The topic of spirituality has recently enjoyed increased popularity within the field of psychology (Pargament, 2007). However, there is an aspect of spirituality that the scientific literature has only started to address -- trauma that occurs through religious manipulation. The current study utilizes a qualitative research design to develop an empirical definition and preliminary model of abuse of religious authority (ARA). Seventeen former members of Christian groups were interviewed by employing a semi-structured interview, and the results were analyzed using grounded theory analysis. All participants reported that the negative aspects of their experience outweighed the positive aspects. Participants provided a …

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Evaluation Of Rope Shovel Operators In Surface Coal Mining Using A Multi-Attribute Decision-Making Model, Ivana M. Vukotic May 2013

Evaluation Of Rope Shovel Operators In Surface Coal Mining Using A Multi-Attribute Decision-Making Model, Ivana M. Vukotic

Graduate Theses, Dissertations, and Problem Reports (ETD)

Rope shovels are used to dig and load material in surface mines. One of the main factors that influence the productivity and energy consumption of rope shovels is the performance of the operator. Existing methods of evaluating operator performance do not consider the relationship between production rate and energy consumption. This thesis presents a method for evaluating rope shovel operators using the Multi-Attribute Decision-Making (MADM) model. Data used in this research were collected from an operating surface coal mine in the southern United States. The MADM model used in this research consists of attributes, their weights of importance, and alternatives. …

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Development Of Hybrid Inorganic-Organic Light-Emitting Devices With Metal Oxide Charge Transport Layers, Rajeev Acharya May 2013

Development Of Hybrid Inorganic-Organic Light-Emitting Devices With Metal Oxide Charge Transport Layers, Rajeev Acharya

Graduate Theses, Dissertations, and Problem Reports (ETD)

Organic light emitting diodes (OLEDs) are currently being considered as the next generation technology in flat panel displays and solid state lighting applications. Among which, phosphorescent organic light emitting diodes (PhOLEDs) with nearly 100% internal quantum efficiency including other properties such as self emitting, high luminescence efficiency, broad wavelength range, wide viewing angle, high contrast, low power consumption, low weight, and large emitting area are gaining popularity in both academic and industrial research. Although development and commercialization of OLED technology is growing, there are still several key issues that need to be addressed---the external quantum efficiency (EQE) needs to be …

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Embodied Revelation: The Threat Of Sudden Cardiac Death For Implantable Cardioverter Defibrillator Candidates, Vera Barton-Caro May 2013

Embodied Revelation: The Threat Of Sudden Cardiac Death For Implantable Cardioverter Defibrillator Candidates, Vera Barton-Caro

Graduate Theses, Dissertations, and Problem Reports (ETD)

BACKGROUND: Heart failure is a severe, chronic condition characterized by high mortality and high morbidity. Sudden cardiac death is the leading cause of death for people with heart failure as well as the primary cause of death in the United States. Implantable cardioverter defibrillators (ICDs) represent the standard of care as the only effective therapy for primary prevention of sudden cardiac death. However, a significant proportion of qualifying heart failure patients declines this life-saving device. Nurses are charged with advocating for well-informed patient decisions. Yet, there is little extant literature that addresses the decision-making process for patients considering an ICD. …

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Solving For Y: Digital Soil Mapping Using Statistical Models And Improved Models Of Land Surface Geometry, Stephen M. Roecker May 2013

Solving For Y: Digital Soil Mapping Using Statistical Models And Improved Models Of Land Surface Geometry, Stephen M. Roecker

Graduate Theses, Dissertations, and Problem Reports (ETD)

Digital soil mapping (DSM) is a rapidly growing area of soil research that has great potential for enhancing soil survey activities and advancing knowledge of soil-landscape relationships. To date many successful studies have shown that geographic datasets can be used to model soil spatial variation. This thesis addresses two issues relevant to DSM, scale effects on digital elevation models, and predicting soil properties. The first issue examined was the effect of spatial extent on the calculation of geometric land surface parameters (LSP) (e.g. slope gradient). This is a significant issue as they represent some of the most common predictors used …

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Circuits, Perfect Matchings And Paths In Graphs, Wenliang Tang May 2013

Circuits, Perfect Matchings And Paths In Graphs, Wenliang Tang

Graduate Theses, Dissertations, and Problem Reports (ETD)

We primarily consider the problem of finding a family of circuits to cover a bidgeless graph (mainly on cubic graph) with respect to a given weight function defined on the edge set. The first chapter of this thesis is going to cover all basic concepts and notations will be used and a survey of this topic.;In Chapter two, we shall pay our attention to the Strong Circuit Double Cover Conjecture (SCDC Conjecture). This conjecture was verified for some graphs with special structure. As the complement of two factor in cubic graph, the Berge-Fulkersen Conjecture was introduced right after SCDC Conjecture. …

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Mechanisms Of Cadmium Tolerance In Populus, Brahma Reddy Induri May 2013

Mechanisms Of Cadmium Tolerance In Populus, Brahma Reddy Induri

Graduate Theses, Dissertations, and Problem Reports (ETD)

Cadmium (Cd), a known carcinogen and one of the leading heavy metal pollutants on a global scale, is released to the atmosphere through various industrial processes such as smelting and mining and other applications including manufacture of batteries and phosphate fertilizers. It causes many deleterious effects in plants, and is harmful to humans through its entry into the food chain. Traditional methods of remediating Cd-contaminated soils, such as excavation and land-filling, are expensive and disturb the natural topography. The emerging method of phytoremediation in which plants are employed to remediate contaminated soils has become increasingly popular because of its cost …

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Evaluating The Intra-Variability And Inter-Variability Of Fibers In Cotton T-Shirts Using Microspectrophotometry, Brianne Miller May 2013

Evaluating The Intra-Variability And Inter-Variability Of Fibers In Cotton T-Shirts Using Microspectrophotometry, Brianne Miller

Graduate Theses, Dissertations, and Problem Reports (ETD)

The objective of this study was to evaluate and compare the differentiation of cotton fibers by the means of intra-garment and inter-garment comparison while utilizing Microspectrophotometry. Five different colors of cotton fibers were used: gold, kelly green, orange, red and royal. Ten t-shirts of each color were used in this study. Phase I of this study involved using the CRAICRTM QDI QDS II(TM) Stereomicrospectrophotometer to produce a spectrum of the front, back, sleeve and armpit of the t-shirt. These sections were then compared to the color chips in the Munsell Book of Color by observing them with the naked eye. …

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The Streptococcal Collagen-Like Protein-1 (Scl1) Is A Multifunctional Adhesin In Extracellular Matrix Interactions, Biofilm Formation, And Host Colonization By Group A Streptococcus, Heaven A. Oliver-Kozup May 2013

The Streptococcal Collagen-Like Protein-1 (Scl1) Is A Multifunctional Adhesin In Extracellular Matrix Interactions, Biofilm Formation, And Host Colonization By Group A Streptococcus, Heaven A. Oliver-Kozup

Graduate Theses, Dissertations, and Problem Reports (ETD)

Group A Streptococcus (GAS) is responsible for over 100 million skin infections annually that may lead to invasive episodes and autoimmune sequelaes. Wounds and unapparent skin infringements are susceptible to the introduction of GAS and serve as a portal of entry. The nutritional nature of a wound and the accessibility to exposed host cell surfaces and extracellular matrix components create a model milieu for successful host colonization and potential biofilm formation. The initiation of biofilm is often mediated by bacterial surface adhesins and has been shown to interfere with wound healing by blocking critical host cellular interactions. However, the underlying …

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Differences In Early Childhood Environmental Rating Scale Scores In Collaborative And Non-Collaborative West Virginia Pre-K Classrooms Located In Child Care Facilities, Jessica S. Day May 2013

Differences In Early Childhood Environmental Rating Scale Scores In Collaborative And Non-Collaborative West Virginia Pre-K Classrooms Located In Child Care Facilities, Jessica S. Day

Graduate Theses, Dissertations, and Problem Reports (ETD)

Quality of pre-k collaborative and non-collaborative classrooms was investigated for differences in environmental quality between the two types of classrooms. Data was collected through the West Virginia Department of Health and Human Resources grant titled, "Quality Rating and Improvement for West Virginia Child Care." Quality was measured using the Early Childhood Environmental Rating Scale-Revised (ECERS-R), which has 43 items across seven subscales: Space and Furnishings, Personal Care Routines, Language-Reasoning, Activities, Interaction, Program Structure, and Parents and Staff. Thirty-six pre-k collaborative programs participated and 136 non-collaborative programs participated in the study. Non-collaborative pre-k classrooms had lower mean scores on all subscales …

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Energy Management Control For Multimode Microgrid Renewable Integration, Roopa Ramachandran May 2013

Energy Management Control For Multimode Microgrid Renewable Integration, Roopa Ramachandran

Graduate Theses, Dissertations, and Problem Reports (ETD)

The need for storing energy has grown in correlation with the need for renewable and distributed energy resources. Designing a storage unit system which complements the distributed generation is required for increased efficiency and reducing the burden on the utility grid. The energy storage model used in this thesis is the Li-ion battery which is efficient, has high energy density and has applications in field of electronics, transportation and electric power industry. The wind turbine generator, photovoltaic (PV) and the energy storage unit modeled in this work share a symbiotic relationship even though they are completely separate entities which can …

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Early And Late Stage Mechanisms For Vocalization Processing In The Human Auditory System, William James Talkington May 2013

Early And Late Stage Mechanisms For Vocalization Processing In The Human Auditory System, William James Talkington

Graduate Theses, Dissertations, and Problem Reports (ETD)

The human auditory system is able to rapidly process incoming acoustic information, actively filtering, categorizing, or suppressing different elements of the incoming acoustic stream. Vocalizations produced by other humans (conspecifics) likely represent the most ethologically-relevant sounds encountered by hearing individuals. Subtle acoustic characteristics of these vocalizations aid in determining the identity, emotional state, health, intent, etc. of the producer. The ability to assess vocalizations is likely subserved by a specialized network of structures and functional connections that are optimized for this stimulus class. Early elements of this network would show sensitivity to the most basic acoustic features of these sounds; …

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Natural Kenaf Fiber Reinforced Composites As Engineered Structural Materials, David B. Dittenber May 2013

Natural Kenaf Fiber Reinforced Composites As Engineered Structural Materials, David B. Dittenber

Graduate Theses, Dissertations, and Problem Reports (ETD)

The objective of this work was to provide a comprehensive evaluation of natural fiber reinforced polymer (NFRP)'s ability to act as a structural material.;As a chemical treatment, aligned kenaf fibers were treated with sodium hydroxide (alkalization) in different concentrations and durations and then manufactured into kenaf fiber / vinyl ester composite plates. Single fiber tensile properties and composite flexural properties, both in dry and saturated environments, were assessed.;Based on ASTM standard testing, a comparison of flexural, tensile, compressive, and shear mechanical properties was also made between an untreated kenaf fiber reinforced composite, a chemically treated kenaf fiber reinforced composite, a …

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Accelerating Moea Non-Dominated Sorting By Preserving Archival Relationships, Joseph Axilrod Craig May 2013

Accelerating Moea Non-Dominated Sorting By Preserving Archival Relationships, Joseph Axilrod Craig

Graduate Theses, Dissertations, and Problem Reports (ETD)

Non-dominated sorting is an important part of many multi-objective evolutionary algorithms (MOEAs). It is used to determine which individuals to keep in the archive of best individuals between generations and to evaluate fitness for breeding. Because this sorting is performed after every generation, it can contribute significantly to the running time of an MOEA. If the population size is sufficiently large, the time spent sorting the population can come to dominate an MOEA's running time.;The non-dominated sorting algorithms in the literature propose optimizations that focus on skipping unnecessary comparisons among individuals. While these algorithms provide different means for skipping these …

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