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Integer Flows And Modulo Orientations, Yezhou Wu
Integer Flows And Modulo Orientations, Yezhou Wu
Graduate Theses, Dissertations, and Problem Reports (ETD)
Tutte's 3-flow conjecture (1970's) states that every 4-edge-connected graph admits a nowhere-zero 3-flow. A graph G admits a nowhere-zero 3-flow if and only if G has an orientation such that the out-degree equals the in-degree modulo 3 for every vertex. In the 1980ies Jaeger suggested some related conjectures. The generalized conjecture to modulo k-orientations, called circular flow conjecture, says that, for every odd natural number k, every (2k-2)-edge-connected graph has an orientation such that the out-degree equals the in-degree modulo k for every vertex. And the weaker conjecture he made, known as the weak 3-flow conjecture where he suggests that …
Group Connectivity Of Graphs, Senmei Yao
Group Connectivity Of Graphs, Senmei Yao
Graduate Theses, Dissertations, and Problem Reports (ETD)
Tutte introduced the theory of nowhere-zero flows and showed that a plane graph G has a face k-coloring if and only if G has a nowhere-zero A-flow, for any Abelian group A with |A| ≥ k. In 1992 Jaeger et al. [16] extended nowhere-zero flows to group connectivity of graphs: given an orientation D of a graph G, if for any b: V (G) A with sumv∈ V(G ) b(v) = 0, there always exists a map ƒ: E(G) A - {lcub}0{rcub}, such that at each v ∈ V(G), e=vw isdirectedfrom vtow fe- e=uvi sdirectedfrom utov fe=b v in A, …
Perfect Matching And Circuit Cover Of Graphs, Dong Ye
Perfect Matching And Circuit Cover Of Graphs, Dong Ye
Graduate Theses, Dissertations, and Problem Reports (ETD)
The research of my dissertation is motivated by the Circuit Double Cover Conjecture due to Szekeres and independently Seymour, that every bridgeless graph G has a family of circuits which covers every edge of G twice. By Fleischner's Splitting Lemma, it suffices to verify the circuit double cover conjecture for bridgeless cubic graphs.;It is well known that every edge-3-colorable cubic graph has a circuit double cover. The structures of edge-3-colorable cubic graphs have strong connections with the circuit double cover conjecture. In chapter two, we consider the structure properties of a special class of edge-3-colorable cubic graphs, which has an …
Driving Cycle Properties And Their Influence On Fuel Consumption And Emissions, Oscar Francisco Delgado-Neira
Driving Cycle Properties And Their Influence On Fuel Consumption And Emissions, Oscar Francisco Delgado-Neira
Graduate Theses, Dissertations, and Problem Reports (ETD)
When developing regulations or preparing emissions inventory models for on-road mobile sources, it is of critical importance to obtain representative values of fuel consumption and emissions rates that accurately represent the vehicle behavior for varying vehicle operation. Unfortunately, fuel consumption and emissions are often only known for a few test cycles which generally represent limited types of vehicle activity. It is known that distance-specific emissions and vehicle fuel consumption strongly depend on the vehicle activity and this dependency causes difficulties when trying to estimate fuel consumption and emissions over different vehicle activity than the original test cycle(s). The central hypothesis …
Optimal Portfolio And Consumption With Transaction Costs, Zheng Zhang
Optimal Portfolio And Consumption With Transaction Costs, Zheng Zhang
Graduate Theses, Dissertations, and Problem Reports (ETD)
In Chapter 1, we study optimal portfolio and consumption with both fixed and proportional transaction costs. For a power utility function we find an explicit solution to the HJB equation governing the no-transaction region. Based on the explicit solution, we formulate a combined stochastic and impulse control problem as a quasi-variational inequality and find the transaction regions, the no-transaction region, and the boundary curves separating them. We show that the explicit solution we find satisfies the verification theorem and it is also a viscosity solution for the quasi-variational inequality. We present numerical results where we compare the various cases of …
Age, Expertise, And The Sunk-Cost Fallacy, Tara E. Karns
Age, Expertise, And The Sunk-Cost Fallacy, Tara E. Karns
Graduate Theses, Dissertations, and Problem Reports (ETD)
The present study is an investigation of age and expertise differences in the sunk-cost fallacy (SCF), the phenomenon of basing one's decision on past investments rather than the future consequences and/or benefits. The current study used a procedure which required participants to answer sunk-cost vignettes and to justify their answers to the vignettes. Results revealed that demonstration of the SCF decreased with age: young adults demonstrated the fallacy the most frequently and older adults demonstrated it the least frequently. An age by expertise interaction was identified for normatively correct decisions: expert young adults made more normatively correct decisions than naive …
Using Concept Mapping To Identify Action Steps For Physical Activity Promotion In Cancer Treatment, Sean J. Fitzpatrick
Using Concept Mapping To Identify Action Steps For Physical Activity Promotion In Cancer Treatment, Sean J. Fitzpatrick
Graduate Theses, Dissertations, and Problem Reports (ETD)
The benefits of exercise during and after cancer treatment represent research areas that have received increased attention throughout the past two decades. Numerous benefits have been observed for cancer survivors who are physically active (Speck, Courneya, Masse, Duval & Schmitz, 2010). Yet oncologists have been slow to incorporate exercise counseling into practice (Daley et al., 2007). The objective of this study was to gather input from both researchers and oncologists as to what needs to happen for exercise to become part of standard care once treatment ends. The concept mapping process developed by Trochim and Kane (2007) was utilized to …
The Use Of Controls In The Music Of Lou Harrison: An Analytical Study, Christopher Jason Koontz
The Use Of Controls In The Music Of Lou Harrison: An Analytical Study, Christopher Jason Koontz
Graduate Theses, Dissertations, and Problem Reports (ETD)
This research project provides insight into composer Lou Harrison's formative years, with particular attention given to events that would prove influential upon his later development as a composer. An overview of Harrison's compositional training with both Henry Cowell and Arnold Schoenberg serves as a means of understanding how some of his atonal compositional techniques developed.;Theoretical analyses of two compositions from Harrison's early catalogue illustrate a synthesis of atonal procedures he used to unify the formal, intervallic, serial, melodic, and harmonic content of the selected works.
Sustainability Of Coalition Of Essential School's Professional Development As Perceived By Teachers, Kristine E. Mcgee
Sustainability Of Coalition Of Essential School's Professional Development As Perceived By Teachers, Kristine E. Mcgee
Graduate Theses, Dissertations, and Problem Reports (ETD)
Research indicates a strong need to incorporate professional development into a well-orchestrated reform effort. The Coalition of Essential Schools (CES) reform model for this failing school was selected by the county administration and a few select teachers as East Elementary School. The sustainability of the professional development provided by CES is the focus of this study.;This study concluded that East Elementary School was perceived by teachers as having sustainable professional-development components. Major findings included the following: (a) the teachers played a key role in sustaining professional development at this school, (b) professional development changed how teachers communicated with students at …
Essays On The Economics Of Student Achievement, Amy F. Higginbotham Godfrey
Essays On The Economics Of Student Achievement, Amy F. Higginbotham Godfrey
Graduate Theses, Dissertations, and Problem Reports (ETD)
Parents, lawmakers, and economists are all keenly interested in what affects student performance. This dissertation explores factors influencing student achievement in West Virginia with special attention devoted to public education resources and gender. Politicians and many parents of school age children believe increased levels of education funding or resources result in higher student achievement. Chapters 2 and 3 delve into this topic by exploring student achievement at different grade levels in West Virginia. The first public education funding or resource change to be analyzed occurred during a time period when the base for public education financing was expanding and funding …
Inquiry Into Place-Based Education In Art, Marie L. Drexler
Inquiry Into Place-Based Education In Art, Marie L. Drexler
Graduate Theses, Dissertations, and Problem Reports (ETD)
A place-based pedagogy is a call for educators to utilize local environs in content curricula to build upon and enrich instruction for students. This study examines the potential for K-12 schools in West Virginia to reasonably adhere to place-based art education methods in visual arts curricula. Data collection consisted of interviews conducted with three West Virginia public school art educators and three community specialists who work in the fields of art, ecology, and art education. Using qualitative analysis, the open-ended responses from both the teachers and the community specialists were analyzed. The conclusion section reviews limitations to placebased education expressed …
Use Of 3d Seismic Azimuthal Iso-Frequency Volumes For The Detection And Characterization Of High Porosity/Permeability Zones In Carbonate Reservoirs, Brian E. Toelle
Use Of 3d Seismic Azimuthal Iso-Frequency Volumes For The Detection And Characterization Of High Porosity/Permeability Zones In Carbonate Reservoirs, Brian E. Toelle
Graduate Theses, Dissertations, and Problem Reports (ETD)
Among the most important properties controlling the production from conventional oil and gas reservoirs is the distribution of porosity and permeability within the producing geologic formation. The geometry of the pore space within these reservoirs, and the permeability associated with this pore space geometry, impacts not only where production can occur and at what flow rates but can also have significant influence on many other rock properties. Zones of high matrix porosity can result in an isotropic response for certain reservoir properties whereas aligned porosity/permeability, such as open, natural fracture trends, have been shown to result in reservoirs being anisotropic …
Analytical Evaluations Of Buckling Behavior Of Wood Composite I-Joist With Sinusoidal Web, Pengcheng Jiao
Analytical Evaluations Of Buckling Behavior Of Wood Composite I-Joist With Sinusoidal Web, Pengcheng Jiao
Graduate Theses, Dissertations, and Problem Reports (ETD)
Flexural-torsional buckling or lateral torsional buckling is an important limit state for wood composite I-joist because the in-plane bending stiffness is typically greater than torsional lateral bending stiffness. Web local buckling is another important limit state because of the thin-walled web configuration. To increase the buckling capacities of wood composite I-joist, a new structural wood composite I-joist with sinusoidal web has been developed at West Virginia University. Extensive experimental investigations have been conducted in a companion study (McGraw, 2012). This study presents analytical evaluations of buckling behavior, including flexural-torsional buckling of simply-supported beam and cantilever beam, and local buckling of …
Calculating The Surface Seismic Signal From A Trapped Miner, Adeniyi A. Adebisi
Calculating The Surface Seismic Signal From A Trapped Miner, Adeniyi A. Adebisi
Graduate Theses, Dissertations, and Problem Reports (ETD)
The recent Sago mine disaster has highlighted the need to fundamentally analyze the practical detection limitations of a mine rescue seismic system (Heasley, 2006). In various field tests, it was discovered that the surface peak particle velocity resulting from the trapped miner who pounds on the mine roof becomes undetectable past a certain distance from the surface geophones. In order to provide the mine rescuer the understanding of the exact extent of this distance; and the foreknowledge about the excepted magnitude of the surface peak particle movement in terms of: depth, geology and offset angle, this study was performed.;To achieve …
Rules Of The Game: Effects Of A Game-Based Metaphor On Instructional Activity Design And The Use Of Student Mentors On Learning Outcomes In A Middle School General Science Class, Angie Dowling
Graduate Theses, Dissertations, and Problem Reports (ETD)
This study investigated the effects of a game-like environment on instructional activity design and the use of student mentors on learning outcomes in a middle school general science class. The participants for this study were 165 students, ages 13-14 years old, who were enrolled in 8th grade at a mid-Atlantic middle school. Two research questions were used to conduct the research:;1. Can science content be designed and successfully delivered instructionally using a game-like learning environment?;2. Does the use of student mentors/assistants help direct and maintain the flow of the class away from the technological issues toward the necessary learning outcomes …
Comprehensive And Integrated Model For Atmospheric Status In Sealed Underground Mine Areas, Jianwei Cheng
Comprehensive And Integrated Model For Atmospheric Status In Sealed Underground Mine Areas, Jianwei Cheng
Graduate Theses, Dissertations, and Problem Reports (ETD)
Mine gas explosion is one of the most feared hazards in the coal industry worldwide. More often one gas explosion related accident can cause the death of multiple coal miners. Since the beginning of coal mining, numerous mine workers have lost their lives as a result of gas explosions. Such occurrences have long been a major concern for mining engineers. Examination of two coal mine disasters (Sago mine and UBB mine) that have occurred in the U.S. in recent years reveals that all explosions originated from or around the sealed areas. Therefore, a good understanding of the atmospheric status in …
Metonymic, Thomas Stollar
Metonymic, Thomas Stollar
Graduate Theses, Dissertations, and Problem Reports (ETD)
This thesis intends to support and describe Metonymic, a Masters of Fine Arts exhibition. The exhibition was the result of recorded introspection during the month of January 2012. Metonymic (Image 1)* aimed to highlight the importance of seemingly meaningless everyday occurrences, feelings, and emotions on the growth of one's personality. Ultimately the exhibition emphasizes the abstract nature of human personality, and its unimaginable complexities. *Please refer to dissertation for diagrams.
A Simplified Icing Model For Simulation And Analysis Of Dynamic Effects, Matthew A. Cunningham
A Simplified Icing Model For Simulation And Analysis Of Dynamic Effects, Matthew A. Cunningham
Graduate Theses, Dissertations, and Problem Reports (ETD)
Ice accretions on aerodynamic surfaces are a major concern during flight. In this research effort, glaze ice is being modeled and its effects on aircraft dynamics analyzed. This type of ice builds up as a clear layer on aerodynamic surfaces and other components such as antennas and intakes. Glaze icing is dangerous because as the amount of ice increases, it alters the shape and properties of the aerodynamic surface. Wind tunnel tests of this type of icing and data analysis have shown that the main effects of icing consist of decrease of lift coefficient, reduction of stall angle of attack, …
The Critical Middle Years And The Relationship Of Early Access To Algebra On High School Math Course Completion And College Readiness, Kim Victoria Smith Green
The Critical Middle Years And The Relationship Of Early Access To Algebra On High School Math Course Completion And College Readiness, Kim Victoria Smith Green
Graduate Theses, Dissertations, and Problem Reports (ETD)
Many students who enroll in higher education are unprepared to meet the challenges of postsecondary education. The probability that students will make a successful transition from high school to college is linked to the degree to which their secondary educational experiences have prepared them for the expectations and demands they will encounter in college. National findings provide continuing evidence that focusing on improving student achievement in mathematics will positively impact college readiness. The main problem addressed in this quantitative study was how educators can best prepare students for college readiness. Since college readiness is highly dependent upon math achievement in …
The Use Of Concept Mapping/Pattern Matching To Determine The Content Domain For Information Literacy In Baccalaureate Education, Eleanor M. Messman-Mandicott
The Use Of Concept Mapping/Pattern Matching To Determine The Content Domain For Information Literacy In Baccalaureate Education, Eleanor M. Messman-Mandicott
Graduate Theses, Dissertations, and Problem Reports (ETD)
This study assessed the relevance of a national association's standards for developing information literacy competency in undergraduate students at a mid-sized, regional university in Maryland. Key stakeholders responsible for ensuring student success in achieving information literacy competency at the institution were solicited for their expertise to identify the outcomes they consider to indicate information literacy competency. The group of 14 participants included six faculty, three librarians, three student affairs professionals, and two students. Trochim's Concept Mapping/Pattern Matching methodology was used for gathering and analyzing the data to conceptualize the domain of information literacy competencies. The key stakeholders generated 80 student …
Impact Of Stimulation Treatments On Production Performance Of Horizontal Wells In The Marcellus Shale, Kimberly L. Larch
Impact Of Stimulation Treatments On Production Performance Of Horizontal Wells In The Marcellus Shale, Kimberly L. Larch
Graduate Theses, Dissertations, and Problem Reports (ETD)
The interest in exploitation of ultra-low permeability formations, such as the Marcellus Shale, has increased in the recent years. Shale formations require massive stimulation treatments to achieve economic production. The recent advances in horizontal drilling and multistage hydraulic fracturing have proved successful in achieving commercial production. However, the parameters that directly affect lifetime production of the wells have not been well established.;The primary objective of this study is to examine the effects of basic stimulation parameters used in hydraulic fracturing of Marcellus Shale wells on production performance. Historical production data and stimulation treatment information have been collected and analyzed for …
State Supervisors' Perceptions Of Teacher Efficacy Regarding Alternatively Certified/Licensed Secondary Agriculture Teachers, Joshua E. Rice
State Supervisors' Perceptions Of Teacher Efficacy Regarding Alternatively Certified/Licensed Secondary Agriculture Teachers, Joshua E. Rice
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this study was to identify state supervisors' perceptions of teacher efficacy regarding alternatively certified/licensed secondary agriculture teachers. The researcher focused on state supervisors' perception of alternatively certified/licensed teachers' efficacy in relationship to classroom/laboratory, supervised agriculture experience programs, and the National FFA organization. The researcher chose to conduct descriptive survey. Forty five states expressed that they offered alternative certification/licensure (N = 45). The population consisted of all state supervisors of agriculture educators as listed by the 2010-2011 approved list from the American Association for Agricultural Education and the National Association of Supervisors of Agricultural Education. State supervisors disagreed …
Understanding Search-Based Software Engineering, Paul William Mcburney
Understanding Search-Based Software Engineering, Paul William Mcburney
Graduate Theses, Dissertations, and Problem Reports (ETD)
Pareto Optimization is a method of finding the space of best solutions possible given multiple class dimensions. In practice, however, it is difficult for users to visualize how solutions are spaced across this multi-dimensional frontier. Existing algorithms like NSGA-II are capable of quickly finding the Pareto frontier. However, users cannot use these algorithms to understand how changes to a solution effect the qualities of that solution.;In response to these issues, this paper presents "HOW". Not only is "HOW" capable of finding the Pareto frontier across multiple dimensions, but HOW can also explain how each point was derived, and compare points …
Cycles, Disjoint Spanning Trees And Orientations Of Graphs, Yanting Liang
Cycles, Disjoint Spanning Trees And Orientations Of Graphs, Yanting Liang
Graduate Theses, Dissertations, and Problem Reports (ETD)
A graph G is hamiltonian-connected if any two of its vertices are connected by a Hamilton path (a path including every vertex of G); and G is s-hamiltonian-connected if the deletion of any vertex subset with at most s vertices results in a hamiltonian-connected graph. We prove that the line graph of a (t + 4)-edge-connected graph is (t + 2)-hamiltonian-connected if and only if it is (t + 5)-connected, and for s ≥ 2 every (s + 5)-connected line graph is s-hamiltonian-connected.;For integers l and k with l > 0, and k ≥ 0, Ch( l, k) denotes the collection …
Professional Development School Support Of The Elementary Globe Curriculum A Facilitated Adaptation Of Inquiry Science, Vance D. High
Professional Development School Support Of The Elementary Globe Curriculum A Facilitated Adaptation Of Inquiry Science, Vance D. High
Graduate Theses, Dissertations, and Problem Reports (ETD)
This qualitative study focused on identifying barriers and remedies to those barriers found when teaching elementary school science. The Elementary GLOBE Program (2006) was the curriculum selected when doing the 18 month study. The researcher asked what made Elementary GLOBE (EG) easy and/or difficult to use. The researcher also wished to ascertain what impact did the adoption of EG have on the delivery of science instruction in the K-4 grade classrooms participating in this study. Two professional developments schools (PDS), located in a Mid Atlantic state were the sites for the study. Both schools are in an urban setting and …
Initiation And Evolution Of Matrix Cracking In Non-Symmetric Laminates Under In-Plane And Flexural Loading, Adi Adumitroaie
Initiation And Evolution Of Matrix Cracking In Non-Symmetric Laminates Under In-Plane And Flexural Loading, Adi Adumitroaie
Graduate Theses, Dissertations, and Problem Reports (ETD)
A constitutive model of progressive matrix cracking in fibers reinforced laminated composite is developed for the case of both membrane and flexural deformation. The progressive damage model makes use of the following key ingredients i) an appropriate material model for calculating the reduced thermo--elastic properties of the laminate containing individual plies affected by matrix cracking, ii) an energy based damage evolution criterion inspired by Fracture Mechanics, iii) an homogenization technique inspired by Continuum Damage Mechanics, iv) an iterative procedure in order to detect the conditions for damage growth in individual plies of the laminate, and to increase the damage level …
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 …
Part I - Evaluating Effects Of Oligomer Formation On Cytochrome P450 2c9 Electron Transfer And Drug Metabolism, Part Ii - Utilizing Molecular Modeling Techniques To Study The Src-Interacting Proteins Actin Filament Associated Protein Of 110 Kda (Afap-110) And Cortactin., John Edward Jett
Graduate Theses, Dissertations, and Problem Reports (ETD)
The dissertation has been divided into two parts to accurately reflect the two distinct areas of interest pursued during my matriculation in the School of Pharmacy at West Virginia University. In Part I, I discuss research probing the nature of electron transfer in the Cytochrome P450 family of proteins, a group of proteins well-known for their role in drug metabolism. In Part II, I focus on in silico and in vitro work developed in concert to probe protein structure and protein-protein interactions involved in actin filament reorganization and cellular motility. Part I. Cytochrome P450s (P450s) are an important class of …
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 …
Discrete Wavelet Transform Analysis Of Surface Electromyography For The Objective Assessment Of Neck And Shoulder Muscle Fatigue, Suman Kanti Chowdhury
Discrete Wavelet Transform Analysis Of Surface Electromyography For The Objective Assessment Of Neck And Shoulder Muscle Fatigue, Suman Kanti Chowdhury
Graduate Theses, Dissertations, and Problem Reports (ETD)
Objective assessment of neuromuscular fatigue caused by sub-maximal repetitive exertions is essential for the early detection and prevention of risks of neck and shoulder musculoskeletal disorders. In recent years, discrete wavelet transforms (DWT) of surface electromyography (SEMG) has been used to evaluate muscle fatigue, especially during dynamic contractions when the SEMG signal is non-stationary. However, its application to neck muscle fatigue assessment is not well established. Therefore, the purpose of this study was to establish DWT analysis as a suitable method to conduct quantitative assessment of neck muscle fatigue caused by dynamic exertions. Ten human participants performed 40 minutes of …