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Graduate Theses, Dissertations, and Problem Reports (ETD)

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Evaluation Of The Effectiveness Of The International Index Of Erectile Function (Iief-5) (Shim) Questionnaire On The Diagnosis And Treatment Of Erectile Dysfunction, Evelyn Martin May 2013

Evaluation Of The Effectiveness Of The International Index Of Erectile Function (Iief-5) (Shim) Questionnaire On The Diagnosis And Treatment Of Erectile Dysfunction, Evelyn Martin

Graduate Theses, Dissertations, and Problem Reports (ETD)

Thirty million or 52% of males between 40 and 70 years of age in the United States have some degree of erectile dysfunction (ED) (Feldman et al., 1994; Hakim, Subit, Kandzari, & ZasLau, 2002; Tsertsvadze et al., 2009). The American Urology Association (AUA) outlines measures to slow the rate of, control, and treat ED. To decrease the prevalence, ED must be diagnosed, identified, and the major risk factors aggressively controlled. Utilization of clinical practice guidelines (CPGs) may improve identification and documentation of treatment, but questions remain about how to implement CPGs in practice. The purpose of this pilot project was …

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Administrator And Faculty Perceptions Of Incivility And Conflict In The Workplace: A Higher Education Study, Stacey Mcleran Kendig May 2013

Administrator And Faculty Perceptions Of Incivility And Conflict In The Workplace: A Higher Education Study, Stacey Mcleran Kendig

Graduate Theses, Dissertations, and Problem Reports (ETD)

Uncivil workplace behavior in the higher education environment is counterproductive for achieving institutional goals. Prevailing uncivil behaviors frequently result in unresolved conflict, a focus of various researchers since the mid 1970's (Andersson & Pearson, 1999; Martin & Hine, 2005; Pierre & Peppers, 1976; Pietersen, 2005; and Twale & DeLuca, 2008). This study was designed to examine administrator and faculty members' perceptions of uncivil workplace behaviors and organizational culture. The study further examined the relationship between incivility and organizational culture. The Uncivil Workplace Behavior Questionnaire (Martin & Hine, 2005) and the K & C Organizational Culture Instrument (Kendig & Chapman, 2012) …

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Resilient Journeys: A Case Study Of Why And How Low-Income Families Practice Homeschooling, Cheng-Hsien Wu May 2013

Resilient Journeys: A Case Study Of Why And How Low-Income Families Practice Homeschooling, Cheng-Hsien Wu

Graduate Theses, Dissertations, and Problem Reports (ETD)

The purpose of this study is to explore why and how two low-income families practice homeschooling. A qualitative case study of low-income homeschooling mothers' experiences was conducted over the course of four months in Tennessee and West Virginia. The major research question was: How and why working class families decide to homeschool their children? Specifically, I believed that a qualitative examination of this topic would allow me to answer a number of attendant questions:;1. How and why do local contexts of "choice" shape low-income homeschoolers' experiences? a. How do local public school experiences shape homeschooling experiences, motivations, and practices? b. …

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Development Of Hydrogel Tracer Beads And Comparative Tracer Tests To Better Understand Contaminant Fate And Transport In Karst Systems, Amanda Laskoskie May 2013

Development Of Hydrogel Tracer Beads And Comparative Tracer Tests To Better Understand Contaminant Fate And Transport In Karst Systems, Amanda Laskoskie

Graduate Theses, Dissertations, and Problem Reports (ETD)

Karst aquifers can be highly susceptible to contamination due to a close connection to the land surface, lack of filtration through a soil zone, and rapid transmission along solutionally-enhanced flowpaths. These factors also allow for aquifer contamination by direct injection of immiscible organic compounds in the form of non-aqueous phase liquids (NAPLs). The fate and transport of NAPLs in karst aquifers is poorly understood. Tracer tests allow for qualitative characterization of hydraulic flow in the surface and subsurface, but their results may not be applicable to the movement of NAPL for which density plays a critical role. Particulate tracers have …

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Evaluation Of The Newburg Sandstone Of The Appalachian Basin As A Co2 Geologic Storage Resource, Jack Eric Lewis May 2013

Evaluation Of The Newburg Sandstone Of The Appalachian Basin As A Co2 Geologic Storage Resource, Jack Eric Lewis

Graduate Theses, Dissertations, and Problem Reports (ETD)

The West Virginia Division of Energy is currently evaluating several deep saline formations in the Appalachian basin of West Virginia, which may be potential carbon dioxide (CO2) sequestration targets. The Silurian Newburg Sandstone play, developed in the 1970's, primarily involves natural gas production from reservoir rock with welldeveloped porosity and permeability. High initial pressures encountered in early wells in the Newburg indicate that the overlying Silurian Salina Formation provides a competent seal. Due to the large number of CO2 point sources in the region and the favorable reservoir properties of the formation; including an estimated 300 billion cubic feet (bcf) …

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Detection And Identification Of Software Encryption Solutions In Nt-Based Microsoft Windows Operating Systems, Julian Breyer May 2013

Detection And Identification Of Software Encryption Solutions In Nt-Based Microsoft Windows Operating Systems, Julian Breyer

Graduate Theses, Dissertations, and Problem Reports (ETD)

As encrypted information is very difficult or impossible to reconstruct, there are many situations in which it is critical to detect the presence of encryption software before a computer is shut down. Currently there is no solution that reliably identifies installed encryption software.;For this investigation, thirty encryption software products for Microsoft Windows based on the NT-kernel have been identified and investigated. Operating system dependent factors such as registry, file attributes, operating system attributes, process list analysis and independent factors such as file headers, keyword search, Master Boot Record analysis as well as hashing of software components were investigated and allow …

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Using Empathy In Design To Foster Interest In Social Issues, Kofi Opoku May 2013

Using Empathy In Design To Foster Interest In Social Issues, Kofi Opoku

Graduate Theses, Dissertations, and Problem Reports (ETD)

Design has transformed from being merely a product oriented discipline focused on the promotion of consumer goods to become a goal oriented practice seeking to address the needs and challenges faced by people in their communities. Conventionally, most designers have engaged various processes that help identify the real needs of an audience in order to develop effective solutions. Designing for social change presents the interesting challenge of reaching audience members who may not be directly affected by an issue to become invested in communityled transformations. My thesis uses the context of homelessness to examine how empathic techniques can be employed …

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Aging Effects Of The Cathode And Determination Of Single Electrode Performance In A Solid Oxide Fuel Cell, Xiaoke Chen May 2013

Aging Effects Of The Cathode And Determination Of Single Electrode Performance In A Solid Oxide Fuel Cell, Xiaoke Chen

Graduate Theses, Dissertations, and Problem Reports (ETD)

Solid oxide fuel cells (SOFCs) are promising electrochemical energy conversion devices due to their advantages of high theoretical efficiency, fuel flexibility (including hydrogen and carbon monoxide), scalability, and low emission. An important problem for commercially using the SOFCs is to improve the long term stability for the SOFCs. To improve the lifetime of SOFCs and develop innovative electrode microstructures; we need to understand the individual process including the degradation processes to the cathode or the anode. To identify the independent anode and cathode contributions to the total impedance, one conventional electrochemical tool for evaluation is the reference electrode. Although reference …

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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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Knowledge And Awareness Of Sickle Cell Trait Among Ncaa Division I Fbs, Division I Fcs, Division Ii, And Division Iii Head Football Coaches And Strength And Conditioning Specialists, Timothy D. Yates May 2013

Knowledge And Awareness Of Sickle Cell Trait Among Ncaa Division I Fbs, Division I Fcs, Division Ii, And Division Iii Head Football Coaches And Strength And Conditioning Specialists, Timothy D. Yates

Graduate Theses, Dissertations, and Problem Reports (ETD)

Objective: The purpose of this study is to examine the knowledge of Sickle Cell Trait among head football coaches and strength and conditioning specialists within all three NCAA Divisions. Additionally, a second purpose is to identify whether or not head football coaches and strength and conditioning specialists present awareness and confidence to provide the proper treatment and/or referral for an athlete suffering from an exercise-related event due to Sickle Cell Trait. Design: This study is a descriptive prospective questionnaire analysis of the knowledge and awareness of Sickle Cell Trait among collegiate head football coaches and strength and conditioning specialists. Results: …

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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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From Gunboats To Good Neighbors: U.S. Naval Diplomacy In Peru, 1919-1942, Joel C. Christenson May 2013

From Gunboats To Good Neighbors: U.S. Naval Diplomacy In Peru, 1919-1942, Joel C. Christenson

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation examines the role naval power played in the evolution of U.S. policy toward Latin America during the interwar period, when the United States abandoned armed interventionism in favor of the policy of the "Good Neighbor." Specifically, it focuses on two oft-overlooked types of naval diplomacy the United States used to exercise influence in the South American nation of Peru: the employment of U.S. personnel as naval advisers to the Peruvian government, and the use of U.S. naval vessels as agents of public diplomacy on "goodwill" cruises and port visits in Peruvian waters. It argues that the United States …

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The Effect Of Mood On The Perception Of Facial Expressions And Social Interaction In Adults, Chit Yuen Yi May 2013

The Effect Of Mood On The Perception Of Facial Expressions And Social Interaction In Adults, Chit Yuen Yi

Graduate Theses, Dissertations, and Problem Reports (ETD)

The present study examined how mood influences perception of facial expressions, and how emotion perception predicts differences in social interactions, in a sample of 75 young adults (49 females and 26 males, 18--37 years of age). Participants were assigned to one of the two experimental conditions in which they recalled a personally meaningful emotional event (positive vs. negative). They then completed an emotion perception task that assessed their recognition accuracy and perceived intensity of emotions. At the end of the study, they also engaged in a social interaction with a same-sex confederate while being unobtrusively observed. The results did not …

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Reactivity, Coping, And Adjustment After Bereavement, James A. Henrie May 2013

Reactivity, Coping, And Adjustment After Bereavement, James A. Henrie

Graduate Theses, Dissertations, and Problem Reports (ETD)

Despite the relatively common occurrence of bereavement, or experiencing the death of a loved one, there is considerable variability in individuals' responses to that experience. In the present study, individuals' responses to bereavement were investigated using the Stress and Coping Model (Lazarus, 1966; Lazarus & Cohen, 1977; Lazarus & Folkman, 1984) as a framework. Data from 436 individuals who were bereaved for 24 or fewer months prior to participation in the study were used to investigate associations between age, gender, emotion reactivity, coping, history of depression, grief, and adjustment (in terms of both positive and negative well-being) using a structural …

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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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An Investigation Of The Accuracy Of A New Technique For Surgical Repositioning A Maxilla, Chad L. Westfall May 2013

An Investigation Of The Accuracy Of A New Technique For Surgical Repositioning A Maxilla, Chad L. Westfall

Graduate Theses, Dissertations, and Problem Reports (ETD)

Objectives: The purpose of this study was to test the method of the Four Faces of Orthognathic SurgeryRTM in regards to surgical accuracy and the ability to transfer this method to an academic setting. Methods: An experimental group consisted of 15 patients from a university setting and 17 patients from a private practice setting. Lateral cephalograms were taken immediately prior to the orthognathic procedure and post-operatively within six weeks. Pre-surgical, post-surgical cephalograms, and the hand generated surgical predictions were collected from the sample. The differences of planned and actual changes to incision were then analyzed to determine whether or not …

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Assessment Of Hyporheic Exchange At In-Stream Restoration Structures On Savage River, Garrett County, Maryland, Anna L. Berlinghieri May 2013

Assessment Of Hyporheic Exchange At In-Stream Restoration Structures On Savage River, Garrett County, Maryland, Anna L. Berlinghieri

Graduate Theses, Dissertations, and Problem Reports (ETD)

Previous studies have shown that in-stream restoration structures alter hyporheic exchange dynamics in restored channels; this study assessed hyporheic exchange at a recently constructed stream reach, including the effects of in-stream restoration structures. Hydrometric and thermal data were collected in the streambed near three restoration structures and at a reference site. The hydrometric data indicated that hyporheic flow paths may not have fully developed in the first 16 months following construction; only one in-stream piezometer was unambiguously hydraulically connected to changes in stream stage. Other hydrometric data revealed possible piezometer installations in low permeability materials, potential hydraulic connections to an …

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Assessment Of Age, Diet, And Growth Of Yellow Perch ( Perca Flavescens) In Cheat Lake, West Virginia, Nate Taylor May 2013

Assessment Of Age, Diet, And Growth Of Yellow Perch ( Perca Flavescens) In Cheat Lake, West Virginia, Nate Taylor

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis evaluates population characteristics of yellow perch ( Perca flavescens) in Cheat Lake, West Virginia, and is comprised of two chapters: 1) an introduction and literature review on the biology, ecology, and life history of yellow perch and studies regarding diet growth, and condition and 2) a study examining age and length, summer diet composition, and growth of yellow perch in Cheat Lake, West Virginia. Owing partly to recent mitigation of acidic conditions in the Cheat River watershed, populations of yellow perch and other fishes have increased in Cheat Lake. For this study, I evaluated age and length, summer …

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Spring Studies And A Decision-Making Process To Guide Groundwater Contamination Prevention In An Agricultural Karst Basin, Erin D. Murphy May 2013

Spring Studies And A Decision-Making Process To Guide Groundwater Contamination Prevention In An Agricultural Karst Basin, Erin D. Murphy

Graduate Theses, Dissertations, and Problem Reports (ETD)

Groundwater contamination is a potential major health and environmental issue in karst aquifers because of rapid surface water to groundwater connections and conduit-dominated flow that may allow contaminants to move great distances from their source in a very short amount of time. Agricultural contaminants are a significant problem in Buckeye Creek basin in Greenbrier County, West Virginia. Pasquarell and Boyer (1995) found that cattle grazing near sinking streams, sinkholes, and springs contribute to the elevated levels of fecal coliform bacteria in the groundwater. Six sites in Buckeye Creek basin were monitored for fecal coliform contamination and then analyzed in order …

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Appalachian Alter-Natives: The Back-To-The-Land Migration And Community Change In Appalachia, 1970--2000, Jinny A. Turman May 2013

Appalachian Alter-Natives: The Back-To-The-Land Migration And Community Change In Appalachia, 1970--2000, Jinny A. Turman

Graduate Theses, Dissertations, and Problem Reports (ETD)

Beginning in the late 1960s and continuing through the 1970s, thousands of people migrated from America's cities to the countryside to establish communes and independent homesteads on small plots of land. By working the land they hoped to achieve autonomy, self-sufficiency, and closeness with nature. Cheap land, mild climate, beautiful scenery, and folk culture drew many of these predominately young, white, well educated, and affluent migrants to Appalachia. During the earliest years of the back-to-the-land migration suspicion and occasionally conflict surfaced as natives and newcomers navigated different lifestyle preferences and worldviews, for many of the back-to-the-landers, or "alter-natives," had identified …

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Comparison Of Two Orthodontic Sealants In Prevention Of Enamel Demineralization : An In-Vitro And In-Vivo Study, Doyoung Choi May 2013

Comparison Of Two Orthodontic Sealants In Prevention Of Enamel Demineralization : An In-Vitro And In-Vivo Study, Doyoung Choi

Graduate Theses, Dissertations, and Problem Reports (ETD)

Introduction: Enamel demineralization adjacent to orthodontic brackets is one of the risks associated with orthodontic treatment. Among the techniques utilized to prevent demineralization, application of orthodontic sealants is widely used to provide mechanical coating and fluoride release for the underlying enamel. The purpose of this study was to compare the efficacy in enamel protection during fixed orthodontic treatment in-vitro and in-vivo between two orthodontic sealant products; Opal Seal (Opal Orthodontics by Ultradent, South Jordan, UT) and Pro Seal (Reliance Orthodontic Products, Itasca, IL). The null hypothesis was that there would be no significant difference in protection against enamel demineralization between …

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Building An Instrument For Measuring Academic Administrator And Faculty Member Perceptions Of The Workload Allocation Process As It Applies To Higher Education, Theodore Nelson Pauls May 2013

Building An Instrument For Measuring Academic Administrator And Faculty Member Perceptions Of The Workload Allocation Process As It Applies To Higher Education, Theodore Nelson Pauls

Graduate Theses, Dissertations, and Problem Reports (ETD)

The focus of this study was to build and test an instrument that measures academic administrator and faculty member perceptions of the workload allocation process. The primary findings of this study are founded in the initial use of the developed instrument. Sixty academic administrators and 320 faculty members from colleges of education at 19 high research universities in the southeastern United States were sent the 35 item instrument via electronic survey. Survey items were placed into five unidentified domains related to the workload allocation process. Based on the data from the survey, t-tests were conducted for each domain and for …

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Investigation Of Emissions And Fuel Economy For The Integrated Bus Information System, Jun Tu May 2013

Investigation Of Emissions And Fuel Economy For The Integrated Bus Information System, Jun Tu

Graduate Theses, Dissertations, and Problem Reports (ETD)

The primary objective of this study was to investigate emissions and fuel economy, and develop an Integrated Bus Information System (IBIS) for the Federal Transit Administration (FTA). IBIS included the development of transit fleet emissions models to assist transit agencies in evaluating the emissions implications of new transit vehicle procurements. Compared with existing models, the IBIS prediction model was intended to be less complicated but have sufficient accuracy to achieve its task as a vehicle procurement analysis tool.;Fuel economy (FE) and distance specific emissions (g/mile) were evaluated and predicted by the IBIS model, including carbon monoxide (CO), carbon dioxide (CO2), …

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On The Design, Analysis, And Implementation Of Algorithms For Selected Problems In Graphs And Networks, Matthew D. Williamson May 2013

On The Design, Analysis, And Implementation Of Algorithms For Selected Problems In Graphs And Networks, Matthew D. Williamson

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis studies three problems in network optimization, viz., the minimum spanning tree verification (MSTV) problem, the undirected negative cost cycle detection (UNCCD) problem, and the negative cost girth (NCG) problem. These problems find applications in several domains including program verification, proof theory, real-time scheduling, social networking, and operations research.;The MSTV problem is defined as follows: Given an undirected graph G = (V,E) and a spanning tree T, is T a minimum spanning tree of G? We focus on the case where the number of distinct edge weights is bounded. Using a bucketed data structure to organize the edge weights, …

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Leadership Practices Of A Principal In A High School With A High Teacher Retention Rate, Ronald A. Branch Ii May 2013

Leadership Practices Of A Principal In A High School With A High Teacher Retention Rate, Ronald A. Branch Ii

Graduate Theses, Dissertations, and Problem Reports (ETD)

As political and societal expectations for our nation's public school system continue to increase, leaders of local school systems are ever mindful of the demands for continual improvement. The cornerstone for this improvement is the classroom teacher. Research has supported the idea that teacher experience is influential in the effectiveness of the teacher. The statistics on teacher attrition, though, are disheartening.;The purpose for this research is to uncover emerging themes regarding the leadership practices and cultural elements that are in place in a school that has a high retention rate of teachers. This case study includes a school in the …

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Access, Retention, And Progression Of Marginalized Students In Kisii Schools, Kenya, Harrison Ntabo Oonge May 2013

Access, Retention, And Progression Of Marginalized Students In Kisii Schools, Kenya, Harrison Ntabo Oonge

Graduate Theses, Dissertations, and Problem Reports (ETD)

This study examined how teachers perceive Free Primary Education had influenced access, retention and progression of marginalized students in primary schools in Kisii County, Kenya. A critical pedagogy framework was used to unpack and shed light on teacher and school practices that affected access to basic education of at risk students. Data was collected through 217 surveys given to teachers from 28 purposefully selected primary schools in Kisii County, 3 administrator interviews, and 4 focus group interviews comprised of a total of 30 classroom teachers from 14 schools in a sequential mixed methods design. Four research questions that guided this …

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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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Spatial Relationship Between The Trichloroethylene Degrading Bacteria Dehalococcoides Sp., Sulfate Reducers And Archaea During Reductive Dechlorination, Pujya Wagle Gautam May 2013

Spatial Relationship Between The Trichloroethylene Degrading Bacteria Dehalococcoides Sp., Sulfate Reducers And Archaea During Reductive Dechlorination, Pujya Wagle Gautam

Graduate Theses, Dissertations, and Problem Reports (ETD)

Trichloroethylene (TCE) released to the environment is of great concern due to its toxicity and carcinogencity. The microorganisms involved in bioremediation of TCE such as methanogens (organisms within the domain Archaea), sulfate reducing bacteria (SRB) and Dehalococcoides sp. (DHC) are of particular interest in this study. Three different types of bench scale reactors were constructed to model different aquifer types such as sandy, silty and fractured bedrock aquifers (hereafter type 1, 2 or 3 reactors, respectively). This study evaluated the effect of TCE concentration in different types of reactors on the distribution of selected microorganisms with distance from the source …

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Economic Demagoguery: The Limited Effects Of Presidential Rhetoric, Charles Damien Arthur May 2013

Economic Demagoguery: The Limited Effects Of Presidential Rhetoric, Charles Damien Arthur

Graduate Theses, Dissertations, and Problem Reports (ETD)

Given that there exists considerable disagreement about whether the president has a direct and measurable influence over the economy, I decided to research this divergence of views further (Edwards, 2003; Edwards, 2009; Eshbaugh-Soha, 2005; Wood, 2007; Dolan, Frendreis, & Tatalovich, 2008; Cohen, 1995; Beck, 1982; Golden & Poterba, 1980). In my review of the literature, I found that there is research, improperly measured from my perspective, that claims the president is the most powerful economic leader in the United States and that his words have the power to move economic actors and indicators (Wood, 2007). To show these effects statistically, …

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Factors Considered For Increasing Longwall Panel Width, Jack D. Trackemas May 2013

Factors Considered For Increasing Longwall Panel Width, Jack D. Trackemas

Graduate Theses, Dissertations, and Problem Reports (ETD)

Longwall mining is the preferred method in coal mining to maximize production and reserve recovery by extracting large blocks of coal that have been outlined with a set of continuous miner development entries. In the US, technological advances and system enhancements have steadily improved productivity more in the longwall retreat process as compared to the improvements in continuous miner gateroad development process. Consequently, longwall extraction rates have outpaced gateroad development mining advancement.;This thesis addresses the factors considered for increasing panel width and the solutions to the technical concerns for increasing the longwall face width from the current accepted industry standard …

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