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A Comparison Of Airway Dimensions Among Different Skeletal Craniofacial Patterns, Ronnie J. Sparks
A Comparison Of Airway Dimensions Among Different Skeletal Craniofacial Patterns, Ronnie J. Sparks
Graduate Theses, Dissertations, and Problem Reports (ETD)
Background and Objectives: Much attention has been given to the association of craniofacial skeletal morphology, upper airway dimension, and respiratory function with patients suffering from obstructive sleep apnea. However, much of the information gathered on the aforementioned has been established with the use of 2-Dimensional lateral cephalometry. The objective of this study was to investigate upper airway dimensions among different skeletal patterns using cone-beam computed tomography (CBCT). Methods: A sample of 279 patients who seught orthodontic treatment at the University of Nevada Las Vegas School of Dentistry Department of Orthodontics was included in this study. Pre-treatment multi-slice CBCT scans of …
Family Relationship Analysis In Photos, Xiaolong Wang
Family Relationship Analysis In Photos, Xiaolong Wang
Graduate Theses, Dissertations, and Problem Reports (ETD)
Family relationship analysis has many potential applications, ranging from homeland security through to image search and social activity analysis. In our work, we present five computational problems for family relationship analysis in face photos. Studying these challenging problems is important and useful for semantic image understanding and social context extraction. In our study, the familial traits are learned from pairs of salient local facial parts using discriminative approaches. It is motivated by human perception studies on kinship recognition and the existence of familial traits through genetic inheritance. Second, kinship verification is performed on a pair of faces by integrating the …
A Study Of The Relationship Between Perceived School Culture And Reading Academic Achievement In The Special Education Subgroup At Selected West Virginia Middle Schools., Daton Nacha Dean
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this quantitative study was to determine if a relationship existed between school culture as perceived by teachers and administrators and reading academic achievement in the special education subgroup reading achievement as measured by the 2004-05, 2005-06, 2006- 07, and 2007-08 West Virginia Educational Standards Test (WESTEST) in selected West Virginia middle schools. To determine if a relationship existed, teachers and principals at participating middle schools took the School Culture Survey (SCS). One conclusion of this study was that the school culture of the four participating West Virginia middle schools as perceived by teachers and principals was primarily …
Wellbore Integrity Study For Horizontal Shale Gas Well., Adam Wade
Wellbore Integrity Study For Horizontal Shale Gas Well., Adam Wade
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this thesis was to investigate the wellbore integrity for horizontal shale gas wells using geomechanical properties of shale gas reservoirs to better predict rock behavior, more specifically the maximum stress around the wellbore. Real reservoir properties were used to construct a hypothetical model. A single horizontal well was utilized to analyze the rock behavior. Because we are looking to analyze the geomechanics of the reservoir, two models must be constructed. A reservoir model was first built and then coupled with a more precise geomechanic model. The base model, without any hydraulic fracturing or other stimulation treatments, was …
Effect Of Engineered Metal-Oxide Nanomaterials On Bacterial Viability, Lina Cui
Effect Of Engineered Metal-Oxide Nanomaterials On Bacterial Viability, Lina Cui
Graduate Theses, Dissertations, and Problem Reports (ETD)
The occurrence of emerging or newly identified contaminants in our water resources is of rising concern for human health and the environment. Nanomaterials rise to be among the major emerging contaminants in recent years because of their broad applications. The existing conventional water and wastewater treatment plants are not designed for removal of these contaminants. To date, little is known about the fate and impacts of these contaminants in the water systems.;Engineered nanomaterials such as titanium dioxide (TiO2) are known to produce reactive oxygen species (ROS) under irradiation of ultraviolet or visible light. A sub-lethal level of ROS could trigger …
Bending, Crushing, And Connector Behavior Of Pultruded Glass Frp Tubes, Denny Wayne Dispennette
Bending, Crushing, And Connector Behavior Of Pultruded Glass Frp Tubes, Denny Wayne Dispennette
Graduate Theses, Dissertations, and Problem Reports (ETD)
Understanding the complex mechanics involved in the behavior of thin-walled fiber reinforced polymer (FRP) composite tubes is essential for optimal structural applications. Flexural, crushing, and connection tests were performed on large-diameter thin-walled (D/t > 20) cylindrical tubes comprised of glass FRP composites manufactured using pultrusion process. The tubes were made of either a vinyl ester or a polyurethane matrix, using high pressure resin infusion during pultrusion.;Full scale bending tests were performed with 16 and 12 inch diameters spanning 320 and 240 inches, respectively. The test data revealed that the tubes possessed superior mechanical properties, with ultimate bending strengths of 50-70 ksi …
Simplified Interior Ballistics Analysis Of A Tube Launched Uav Prototype, Edward R. Jackson
Simplified Interior Ballistics Analysis Of A Tube Launched Uav Prototype, Edward R. Jackson
Graduate Theses, Dissertations, and Problem Reports (ETD)
Structural analysis is a critical aspect in the successful design of tube launched projectiles, such as mortar rounds. Ongoing research conducted at West Virginia University has focused on a tube-launched, folding-wing UAV design inspired by mortars. This has driven the necessity of a structural analysis of the prototype design to provide vital feedback to designers to ensure that the UAV is likely to survive the act of launching. Due to the extreme accelerations during the launching phase, a typical mortar round experiences dramatic impulse loads for an extremely brief duration of time. Such loads are the result of the propellant …
Mathematical Modeling And Simulation Of A One-Dimensional Transient Entrained-Flow Gee/Texaco Coal Gasifier, Job S. Kasule
Mathematical Modeling And Simulation Of A One-Dimensional Transient Entrained-Flow Gee/Texaco Coal Gasifier, Job S. Kasule
Graduate Theses, Dissertations, and Problem Reports (ETD)
Numerous gasifier models of varying complexity have been developed to study the various aspects of gasifier performance. These range from simple one-dimensional (1D) models to rigorous higher order 3D models based on computational fluid dynamics (CFD). Even though high-fidelity CFD models can accurately predict many key aspects of gasifier performance, they are computationally expensive and typically take hours to days to execute even on high-performance computers. Therefore, faster 1D partial differential equation (PDE)-based models are required for use in dynamic simulation studies, control system analysis, and training applications.;In the current study, a 1D transient model of a single-stage downward-firing entrained …
Forensic, Archaeological And Related Application Of Inductively Coupled Plasma Mass Spectrometry, Xinya Zhang
Forensic, Archaeological And Related Application Of Inductively Coupled Plasma Mass Spectrometry, Xinya Zhang
Graduate Theses, Dissertations, and Problem Reports (ETD)
Inductively coupled plasma spectrometry (ICP-MS) is a powerful analytical instrument that can be applied to multiple disciplines for trace elements detection. In the first stage of this research, ICP-MS was used to group archaeological pottery sherds based on the compositional information obtained. Provenience of the pottery was evaluated using multivariate analysis. Results were compared with those obtained on the same data set using neutron activation analysis (NAA). It was found that the groups generated in this study were comparable to the previous ones, and more details within groups were observed. In the second stage of this research, ICP-MS was applied …
Discrete Damage Mechanics Applied To Transverse Matrix Cracking, Fernando A. Cosso
Discrete Damage Mechanics Applied To Transverse Matrix Cracking, Fernando A. Cosso
Graduate Theses, Dissertations, and Problem Reports (ETD)
A constitutive model to predict the stiffness and coefficient of thermal expansion (CTE) reduction due to transverse matrix cracking in laminated composite structures is implemented as a user subroutine in Abaqus. The assumptions of the model are a symmetric laminate under in-plane loads and linear distribution of intralaminar shear stresses. The model was latter validated using 3D finite element analysis (FEA) in a repetitive unit volume for a wide interval of crack densities and for several laminates, and the difference was found to be within 3%. The FEA, the model and classical laminate theory all converged to the same values …
Are Electronic Portfolios Used In The Hiring Process Of Special Educators?, Traci J. Tuttle
Are Electronic Portfolios Used In The Hiring Process Of Special Educators?, Traci J. Tuttle
Graduate Theses, Dissertations, and Problem Reports (ETD)
Accountability and assessment in education systems from the k-12 to post-secondary levels have driven reforms in ensuring teacher quality. Past practice and research have confirmed the validity and reliability of portfolio assessments for ensuring quality teacher preparation programs in institutions of higher education. The use of these portfolios, however, has not transferred to the hiring practices of k-12 administrators. This study narrows the body of current research to focus on electronic portfolios as a means to address the specific needs of administrators hiring special educators. The administrators in one state’s education system were sent electronic surveys in attempts to answer …
Sol-Gel Derived Wear-Resistant, Hydrophobic, Particle-Reinforced Silica Coatings, Derrick A. Banerjee
Sol-Gel Derived Wear-Resistant, Hydrophobic, Particle-Reinforced Silica Coatings, Derrick A. Banerjee
Graduate Theses, Dissertations, and Problem Reports (ETD)
Hydrophobic coatings are useful for a wide range of applications including anti-fouling, anti-corrosive, and anti-icing. There are also a number of emerging applications in which transparency is critical such as optoelectronics, touchscreens, and smart windows. For many of these applications, resistance to abrasive wear is also important. Typical low-surface energy coatings such as polytetrafluoroethylene (PTFE) have poor mechanical strength which leaves them susceptible to abrasive wear. To combat this problem, functional moieties can be encapsulated using a sol-gel method to provide improved substrate adhesion and hardness while maintaining transparency and functionality. While this provides an improvement for many applications, the …
Iris Indexing And Ear Classification, Ravindra B. Gadde
Iris Indexing And Ear Classification, Ravindra B. Gadde
Graduate Theses, Dissertations, and Problem Reports (ETD)
To identify an individual using a biometric system, the input biometric data has to be typically compared against that of each and every identity in the existing database during the matching stage. The response time of the system increases with the increase in number of individuals (i.e., database size), which is not acceptable in real time monitoring or when working on large scale data. This thesis addresses the problem of reducing the number of database candidates to be considered during matching in the context of iris and ear recognition. In the case of iris, an indexing mechanism based on Burrows …
Three Essays On The Political Economy Of Public Finance, Adam J. Hoffer
Three Essays On The Political Economy Of Public Finance, Adam J. Hoffer
Graduate Theses, Dissertations, and Problem Reports (ETD)
This dissertation consists of three essays which examine the role political economy factors play in influencing state-level public finance in the United States. In Chapter 1, I introduce the economic logic explaining why political economy factors affect public finance. I then give a brief summary of the three essays presented in Chapters 2-4. Chapter 2 investigates the role tobacco special-interest groups, state ideology, and a number of public finance variables play in determining the state cigarette tax rate. Chapter 3 introduces a new methodology, using spatial econometrics, to investigate tax competition in cigarette tax rates. Chapter 4 examines the disparity …
Guided Wave Resonant Optical Structures And Led Micro Resonators For Biosensing Applications, Rohit Goswami
Guided Wave Resonant Optical Structures And Led Micro Resonators For Biosensing Applications, Rohit Goswami
Graduate Theses, Dissertations, and Problem Reports (ETD)
Integrated opto-electronic and nanophotonic devices for sensing application in the fields of medicine, microbiology, environmental, safety and defense have attracted considerable attention due to their potential for achieving greater compactness, shorter response times and higher sensitivities as compared to non-optical sensing systems. Optical cavity resonant devices such as Fabry--Perot interferometers have been extensively used in lasing applications and optical sensing has been accomplished through many similar technologies.;Fiber optic and planar waveguide based resonant devices which use evanescent waves for detection of refractive index changes are one of the most widely used approaches for photonic sensors. In this work we investigate …
Development Of A Near-Field Magnetic Projectile Location System, Andrew D. Lowery
Development Of A Near-Field Magnetic Projectile Location System, Andrew D. Lowery
Graduate Theses, Dissertations, and Problem Reports (ETD)
Near-field magnetic principles and properties have been well studied and are used in a plethora of modern applications, ranging from medical applications to audio and video processing, and magnetic tracking. Current tracking applications are based in either AC or Pulsed-DC systems. Generally, AC systems have high resolution and accuracy, but perform very poorly in the presence of conducting magnetic materials. Pulsed-DC tracking has the benefit of not inducing large eddy currents in proximity to magnetic materials, thus increasing its overall accuracy. It has been suggested that pure DC systems are not feasible because they are unable to account for the …
Oxygen Transport Kinetics In Solid Oxide Fuel Cell Cathode, Yihong Li
Oxygen Transport Kinetics In Solid Oxide Fuel Cell Cathode, Yihong Li
Graduate Theses, Dissertations, and Problem Reports (ETD)
Solid oxide fuel cells (SOFCs) are energy conversion devices that produce electricity by electrochemically combining a fuel and an oxidant across an ionic conducting oxide electrolyte. As it is regarded as the most efficient and versatile power generation system, SOFCs have attracted more substantial interest in recent years. Oxygen reduction at the cathode is considered as the main rate limiting factor to the performance of the whole system. In this work, experimental study of oxygen transport in single phase and infiltrated cathode materials using electrical conductivity relaxation (ECR) technique are combined with physical modeling to benefit SOFCs cathode improvement.;The conductivity …
Vcast: A Distance-Sensitive Scalable Information Dissemination Protocol, Raja Abhinay Moparthi
Vcast: A Distance-Sensitive Scalable Information Dissemination Protocol, Raja Abhinay Moparthi
Graduate Theses, Dissertations, and Problem Reports (ETD)
The future of intelligent transportation systems lies in dealing with safety and navigation of vehicles. Building a technology that provides the real-time information about the state of other vehicles like its location, speed and direction would help in developing a system that ensures safety along with navigation. However, the network limitations pose difficulty in obtaining the state information over multiple-hops, because of the bandwidth limitations and congestion in the shared wireless channel. Overcoming this challenge would yield an intelligent transportation system which gives information regarding the collisions, lane changes and merges, emergency vehicle approaching alerts, stopped vehicle alerts, etc., over …
Towards The Development Of Redundancy Assessment Protocols For Steel Truss Bridges, Jennifer M. Stains
Towards The Development Of Redundancy Assessment Protocols For Steel Truss Bridges, Jennifer M. Stains
Graduate Theses, Dissertations, and Problem Reports (ETD)
On December 15, 1967, the Silver Bridge across the Ohio River catastrophically collapsed, resulting in the deaths of 46 people. Following the collapse of the Silver Bridge, one of the goals of the development of new bridge inspection and design guidelines was to create a more uniform level of safety in the U.S. highway infrastructure by standardizing inspection frequencies and qualifications for bridges. It was believed that regular maintenance procedures assured that these types of bridge systems possessed acceptable levels of safety. However, on August 1, 2007, the I-35-W Bridge in Minneapolis, MN, collapsed, resulting in 13 fatalities and 145 …
A Work-Pattern Centric Approach To Building A Personal Knowledge Advantage Machine, Daniel Sloan
A Work-Pattern Centric Approach To Building A Personal Knowledge Advantage Machine, Daniel Sloan
Graduate Theses, Dissertations, and Problem Reports (ETD)
A work pattern, also known as a usage pattern, can be broadly defined as the methods by which a user typically utilizes a particular system. Data mining has been applied to web usage patterns for a variety of purposes. This thesis presents a framework by which data mining techniques could be used to extract patterns from an individual's work flow data in order facilitate a new type of architecture known as a knowledge advantage machine. This knowledge advantage machine is a type of semantic desktop and semantic web application that would assist people in constructing their own personal knowledge networks, …
Numerical Flight Testing Of A Tube-Launched Transformable Micro Air Vehicle, William L. Vogel
Numerical Flight Testing Of A Tube-Launched Transformable Micro Air Vehicle, William L. Vogel
Graduate Theses, Dissertations, and Problem Reports (ETD)
The micro air vehicle (MAV) is a relatively new class of Unmanned Aerial Vehicles (UAVs) and has drawn much interest in recent years within the aerospace industry, especially for military surveillance applications. The aerodynamic characteristics of existing MAV designs have been documented in aeronautics literature; however, the MAV presented in this research had unusual design specifications in which the overall mass and cruise speed were greater in comparison to the existing designs. Additionally, the MAV was designed to transform from ballistic flight to aircraft flight for the purpose of gaining performance improvements in both range and accuracy. This new MAV …
Physicians' Perceptions Of West Virginia's Kids First Healthcheck System., Alexandria Kappel
Physicians' Perceptions Of West Virginia's Kids First Healthcheck System., Alexandria Kappel
Graduate Theses, Dissertations, and Problem Reports (ETD)
Universal Pre-K programs provide free, easily accessible education programs in West Virginia for 4-year-olds and 3-year-olds with Individualized Education Programs (Barnett et al., 2010). West Virginia Policy 2525 provides regulations guiding the implementation of the Universal Pre-K programs. Included in the policy are guidelines for areas such as recruitment, enrollment, and instruction. Section 126-26-8.7 of the policy outlines the state’s plan for the target area of developmental screening for the children in its Universal Pre-K classrooms. The plan outlines the use of the West Virginia Kid’s First HealthCheck System. The goal of the study was to study the implementation of …
A Statistical Approach For Shadow Detection Using Spatio-Temporal Contexts, Yiyang Liu
A Statistical Approach For Shadow Detection Using Spatio-Temporal Contexts, Yiyang Liu
Graduate Theses, Dissertations, and Problem Reports (ETD)
Background subtraction is an important step used to segment moving regions in surveillance videos. However, cast shadows are often falsely labeled as foreground objects, which may severely degrade the accuracy of object localization and detection. Effective shadow detection is necessary for accurate foreground segmentation, especially for outdoor scenes. Based on the characteristics of shadows, such as luminance reduction, chromaticity consistency and texture consistency, we introduce a nonparametric framework for modeling surface behavior under cast shadows. To each pixel, we assign a potential shadow value with a confidence weight, indicating the probability that the pixel location is an actual shadow point. …
The Relationship Of Teachers' Perceptions Of High School Principal's Monitoring Student Progress And Student Achievement In Southeastern Ohio, T. C. Chappelear
The Relationship Of Teachers' Perceptions Of High School Principal's Monitoring Student Progress And Student Achievement In Southeastern Ohio, T. C. Chappelear
Graduate Theses, Dissertations, and Problem Reports (ETD)
Principals in school buildings across this nation and perhaps throughout the world are under immense pressure to improve outcomes for all students. Recent literature suggests this accountability may be warranted, at least in part, as there is overwhelming evidence that building principals can positively impact student achievement through their behavior as effective instructional leaders. Much of the evidence for this emanates from the elementary school level. The problem is that little research exists at the high school level to examine the relationship between building principals monitoring student progress and student achievement.;This baseline study examined the relationship between teachers' perceptions of …
The Impact Of A Modified Cooperative Learning Technique On The Grade Frequencies Observed In A Preparatory Chemistry Course, Bridget J. Hayes Russell
The Impact Of A Modified Cooperative Learning Technique On The Grade Frequencies Observed In A Preparatory Chemistry Course, Bridget J. Hayes Russell
Graduate Theses, Dissertations, and Problem Reports (ETD)
This dissertation explored the impact of a modified cooperative learning technique on the final grade frequencies observed in a large preparatory chemistry course designed for pre-science majors. Although the use of cooperative learning at all educational levels is well researched and validated in the literature, traditional lectures still dominate as the primary methodology of teaching. This study modified cooperative learning techniques by addressing commonly cited reasons for not using the methodology. Preparatory chemistry students were asked to meet in cooperative groups outside of class time to complete homework assignments. A chi-square goodness-of-fit revealed that the final grade frequency distributions observed …
Utilization Of Igs Information For Improved Real-Time Gps Positioning, Francis James Barchesky
Utilization Of Igs Information For Improved Real-Time Gps Positioning, Francis James Barchesky
Graduate Theses, Dissertations, and Problem Reports (ETD)
The estimation of a precise user's position is a difficult and complex problem. In addition, the use of geodetic grade position instruments is often not possible for Small Unmanned Aerial Vehicle (SUAV) systems. However, the availability of the global navigation satellite system (GNSS) and International GNSS Service (IGS) predicted product data allows an attempt to increase the precision of a navigation algorithm, which is the aim in this thesis.;The utilization of this information within an algorithm work environment is a complex problem, requiring the development of multiple tools in order to use and access the IGS raw and product data. …
The Arts-Integrated Curriculum (Aic) And Its Possible Impact On The Self-Concepts Of Adolescent Girls And Their Perceptions Of Beauty: A Phenomenological Study, Miriam Roth Douglas
The Arts-Integrated Curriculum (Aic) And Its Possible Impact On The Self-Concepts Of Adolescent Girls And Their Perceptions Of Beauty: A Phenomenological Study, Miriam Roth Douglas
Graduate Theses, Dissertations, and Problem Reports (ETD)
This study examines what phenomena may be associated with the self-concept and perceptions of beauty of adolescent girls who completed an Arts-Integrated Curriculum (AIC) in Elementary School. It is designed to add to the descriptive data on the perceptions of beauty that students, teachers, and parents have, especially with regard to girls' concept of self in relation to the AIC learning experiences. This work is driven by a qualitative research method known as phenomenology, which describes the lived experiences of a phenomenon for a group of people (Patton, 2005). The main research data were collected from interviews with ten participants: …
Hardware Prototype For A Multi Agent Grid Management System, Jerry Lee Thompson
Hardware Prototype For A Multi Agent Grid Management System, Jerry Lee Thompson
Graduate Theses, Dissertations, and Problem Reports (ETD)
There is great effort in the power industry to incorporate Smart Grid functionalities to existing power systems. Distributed generation and the hardware necessary to interface the existing grid, as well as control algorithms to efficiently couple and operate these systems are being researched and implemented extensively. However, the added complexity of such components results in greater opportunities for failure in a system which is already challenging to protect.;There is great effort in the power industry to incorporate Smart Grid functionalities to existing power systems. Distributed generation and the hardware necessary to interface the existing grid, as well as control algorithms …
Modeling And Integration Of Demand Response And Demand Side Resources For Smart Grid Application In Distribution Systems, Naveen Venkatesan
Modeling And Integration Of Demand Response And Demand Side Resources For Smart Grid Application In Distribution Systems, Naveen Venkatesan
Graduate Theses, Dissertations, and Problem Reports (ETD)
Today's electric grid is undergoing drastic changes to evolve into a smart grid. Deregulation of the integrated and monopolistic power system into genco, transco and disco has led to tremendous competition among these players. These entities are in the process of developing innovative smart grid strategies that can improve their reliability and profit. In this thesis work, some of the smart grid initiatives by discos have been explored.;This thesis work is driven by two major objectives. The primary objective is to explore Demand Response (DR), develop its comprehensive model and to analyze various effects and implications of DR on distribution …
Distributed Monte Carlo Simulation, Aruna Sri Bommagani
Distributed Monte Carlo Simulation, Aruna Sri Bommagani
Graduate Theses, Dissertations, and Problem Reports (ETD)
Monte Carlo simulation is an effective way to analyze models of sophisticated problems, but often suffers from high computational complexity. Distributed computing is an effective technology that can be used for compute-intensive applications, such as Monte Carlo simulation. The goal of this thesis is to combine the concepts of Monte Carlo simulation and distributed computing in an effort to develop an efficient system capable of rapidly executing computationally-demanding simulations.;When distributed computing is used to support the simulations of multiple users, a scheduling algorithm is required to allocate resources among the users' jobs. In this thesis, a scheduling algorithm is developed …