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Mine Ventilation Network Optimization Using Nonlinear Programming Techniques., Changhong Huang
Mine Ventilation Network Optimization Using Nonlinear Programming Techniques., Changhong Huang
Graduate Theses, Dissertations, and Problem Reports (ETD)
Mine ventilation, though costly, has to be maintained for any underground coal mine for the sake of miners' safety and health. Higher productivity and more stringent environmental standards require greater quantities of air at the underground working faces. These conditions have brought a great increase in the costs of mining. To survive in the current state of market competition for the mining industry, more concerns have to be addressed on developing a ventilation system which is functionally effective and reliable, and yet economically efficient. Mine ventilation network optimization is one of the approaches to reach that objective. This dissertation is …
The Academic Adjustment Of International Students By Country Of Origin At A Land Grant University In The United States., Georgine Konyu-Fogel
The Academic Adjustment Of International Students By Country Of Origin At A Land Grant University In The United States., Georgine Konyu-Fogel
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of the study was to compare and contrast international students attending West Virginia University by country of origin to examine their academic success and academic adjustment at West Virginia University. Data were collected by a mail survey, contacting 622 international students from India, Japan, Korea, People's Republic of China, Republic of China (Taiwan), and Spain (countries with the largest number of enrollment at West Virginia University during academic year 1992-93). From 552 actual contacts, 290 responses were collected (52.5% response rate). Treatment of data included descriptive and inferential statistics. Cronbach coefficient alphas and Pearson correlation matrix were computed …
Determinants Of Coping Behaviors In Marital Conflict Situations Across Adulthood., Liang-Jei Lee
Determinants Of Coping Behaviors In Marital Conflict Situations Across Adulthood., Liang-Jei Lee
Graduate Theses, Dissertations, and Problem Reports (ETD)
This study examined some plausible factors that were expected to contribute to marital coping behaviors when married couples face marital conflict situations. Self-report measures of personality trait, marital coping behavior, appraisal of marital conflict, marital relationship, and social support were administered to a sample of 197 married community residents ranging in age from 23 to 82 years old. Avoidance, conflict, positive approach, self-blame, self-interest, and seeking social support were the specific marital coping styles examined in this study. A planned confirmatory examination of internal consistency of self-report marital coping measure (the Marital Coping Inventory) revealed that this measure was adequately …
A Multimodal Analysis Of Pain-Related Anxiety: Relations Between Anxiety Reports, Physiological Responses, And Avoidance During Painful And Non-Painful Movement., Lance Maxwell Mccracken
A Multimodal Analysis Of Pain-Related Anxiety: Relations Between Anxiety Reports, Physiological Responses, And Avoidance During Painful And Non-Painful Movement., Lance Maxwell Mccracken
Graduate Theses, Dissertations, and Problem Reports (ETD)
Persons with chronic pain often display extreme disability, distress, and other pain behaviors. It is clear that behavioral factors significantly contribute to the consequences of pain for many of these persons. The purpose of this study was to investigate relations of fearful cognitions about pain with other anxiety responses to pain including subjective reports of anxiety, physiological responses, and amount of activity during painful and nonpainful physical tasks. To show that these responses covary is to suggest that the same principles that apply to anxiety behaviors may apply equally well to the behavior of persons with chronic pain and that …
Autoignition Of Low-Heating Value Gases In A Direct-Injected Diesel Engine., Carlos Emilio Romero
Autoignition Of Low-Heating Value Gases In A Direct-Injected Diesel Engine., Carlos Emilio Romero
Graduate Theses, Dissertations, and Problem Reports (ETD)
The autoignition of gaseous mixtures representative of coal-derived low-heating-value gaseous fuels in a direct injected diesel engine was investigated theoretically over pressure and temperature ranges of 10 to 50 atm and 800 to 1000 K respectively. A computer model was validated with experimental engine data operated on direct injected synthetic coal gas by Caterpillar, Inc. The computed results demonstrated the importance of the characteristic time associated with the chemical kinetics when compared to fluid dynamics mixing. High gas temperatures resulting from high compression ratios, high boost, high inlet air temperature or other ignition aids are needed to ignite these gases …
Singular Systems: Structure, Algorithm, And Application., Jianming She
Singular Systems: Structure, Algorithm, And Application., Jianming She
Graduate Theses, Dissertations, and Problem Reports (ETD)
From engineering point of view, a complete accomplishment should be supported by rigorous mathematical analyses, feasible computational algorithms, and concrete practical applications. The research work of this dissertation is done with an attempt of trying to approach this principle and to understand some basic facts of singular systems in these three aspects. In Part I, a new complementary solution formulation is derived from both the time domain and the frequency domain for singular systems. The solution expressions of regular systems and singular systems are unified. Further, the dynamic characteristics of singular systems are studied. We discussed in detail on the …
The Economics Of The Coal Company Town: Institutional Relationships, Monopsony, And Distributional Conflicts In American Coal Towns., Lawrence William Boyd
The Economics Of The Coal Company Town: Institutional Relationships, Monopsony, And Distributional Conflicts In American Coal Towns., Lawrence William Boyd
Graduate Theses, Dissertations, and Problem Reports (ETD)
Some of the most violent labor struggles in American history were fought by residents of coal company towns. This study investigates whether these struggles grew out of a competitive, or noncompetitive, labor market. In some areas, during the early part of the twentieth century, coal mine labor and capital were brought together through the institution of the company town. In order to capture this institutional context Stephen N. Cheung's sharecropping model was adapted to piece rate coal miners who lived in company towns. Competitive and noncompetitive models predicted: (a) despite the number of firms which operated in a market, miners …
Damage Criteria And Control Measures For Residential Houses Subjected To Longwall Subsidence., Deepak Dutta
Damage Criteria And Control Measures For Residential Houses Subjected To Longwall Subsidence., Deepak Dutta
Graduate Theses, Dissertations, and Problem Reports (ETD)
With the increase in production coming from longwall mining, attendant subsidence on the surface is becoming planned but widespread. As a consequence, in the rural USA, residential houses, farmers' barns, grain silos, county roads, small bridges, streams, grazing ground, underground water, pipe lines, and electric transmission towers are subjected to ground subsidence. Out of these structures and renewable resources, disturbances to residential houses caused by longwall mining are becoming a vexing problem for mine operators and house owners. In the backdrop of the above scenario, this dissertation explores two aspects of the issue, i.e. evaluation of damage to residential houses …
A Comparative Analysis Of The Accommodations Made For The Non-Traditional Student In Basic Programs Of Nursing., Carmel Fortine Esposito
A Comparative Analysis Of The Accommodations Made For The Non-Traditional Student In Basic Programs Of Nursing., Carmel Fortine Esposito
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this study was to determine the extent to which accommodations have been made for the non-traditional student in basic programs of nursing. The target population was all of the Diploma, Associate Degree and Baccalaureate nursing programs accredited by the National League For Nursing in the United States. Programs for this study were selected by random sampling techniques. Fifty nursing programs from each category were determined as an adequate sample size in advance. The instrument for data collection was presented in the form of a survey. Data were obtained and submitted to descriptive analysis. All data were obtained …
The Relationship Of Personality Type To Mathematics Achievement In High School Seniors., Bonnie V. Gillespie
The Relationship Of Personality Type To Mathematics Achievement In High School Seniors., Bonnie V. Gillespie
Graduate Theses, Dissertations, and Problem Reports (ETD)
This study's purpose was to determine relationships between mathematics achievement in high school seniors and personality types as measured by Myers-Briggs Type Indicator (MBTI) and dichotomies of MBTI type: extraversion or introversion (EI), sensing or intuition (SN), thinking or feeling (TF), judgment or perception (JP). The subjects were 269 twelfth grade volunteers from a school district in West Virginia's eastern panhandle. During the spring semester, 1993, the MBTI was administered during the subjects' English classes. Student permanent record cards provided mathematics grade point average and mathematics achievement test scores. T-tests and ANOVA examined relationships with MBTI type, dichotomies of MBTI …
College Athletics In The Future: A Comparative Study Of Presidents' And Athletic Directors' Perceptions., Thomas Michael Gioglio
College Athletics In The Future: A Comparative Study Of Presidents' And Athletic Directors' Perceptions., Thomas Michael Gioglio
Graduate Theses, Dissertations, and Problem Reports (ETD)
The major purpose of this study was to determine perceptions of Division I-A presidents and athletic directors as they concern the future direction of Division I-A athletic programs. A secondary purpose was to determine differences between Division I-A presidents and athletic directors perceptions according to conference affiliation and geographical district affiliation. Descriptive research was conducted using a questionnaire, which was taken from existing literature and adapted for use by the researcher. The questionnaire contained categories including: demographics, athletic scholarship, scheduling, eligibility, NCAA involvement, financial, and legislative involvement. The study's population included all college presidents and athletic directors from 106 NCAA …
The Effects Of A Collaborative Intervention Program On The Academic Achievement Of Selected At-Risk Students., Benny Lee Guido
The Effects Of A Collaborative Intervention Program On The Academic Achievement Of Selected At-Risk Students., Benny Lee Guido
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this five-month study was to examine and determine the effects of a collaborative intervention program on the academic achievement of selected at risk students. Forty-four (44) at risk students in grades one through eight were selected to participate in this study. Criteria for selection included the following: one or more years behind age or grade-level groups in math and/or reading skill levels; one or more years behind age or grade-level groups in number of credits earned; potential to be school dropout; high rate of absenteeism; adjudicated delinquency; student parenthood; low CTBS/WV-STEP scores; poor grade point average; retention …
The Relationship Between Self-Perceived Psychological Types Of Male And Female Community College Deans Of Instruction And Their Self-Perceived Leadership Styles., Joan Carol Henry-Lucas
The Relationship Between Self-Perceived Psychological Types Of Male And Female Community College Deans Of Instruction And Their Self-Perceived Leadership Styles., Joan Carol Henry-Lucas
Graduate Theses, Dissertations, and Problem Reports (ETD)
This study was designed to examine the relationship between the self-perceived psychological types of male and female community college deans of instruction and their self-perceived leadership styles. The population consisted of 881 male (N = 667) and female (N = 204) community college deans of instruction identified by mailing labels from the American Association of Community and Junior Colleges who were serving in public institutions in the United States listed in the AACJC Membership Directory 1992. A proportional, stratified, random sample was conducted of 267 subjects--205 male deans and 62 female deans. A cover letter, demographic survey, the Leadership Behavior …
An Investigation Of Within-Evaluation Markers For Detecting Malingered Memory Impairment., Grant Loren Iverson
An Investigation Of Within-Evaluation Markers For Detecting Malingered Memory Impairment., Grant Loren Iverson
Graduate Theses, Dissertations, and Problem Reports (ETD)
Neuropsychologists frequently are called upon to evaluate patients in a medicolegal context. An important part of these evaluations is determining whether the patient is being honest and forthright in his presentation of symptoms and in his test performance, or whether the patient is deliberately exaggerating his deficits via malingering. The purpose of this investigation was to examine the efficacy of using the Recognition Memory Test (RMT), Digit Span Test (WAIS-R), and Knox Cube Test as markers for malingered memory deficits. These tests were all designed to measure some aspect of attention and memory, not to assess non-optimal test performance. However, …
Colouring, Covering, Reconstruction, And 3-To-1 Maps Of Graphs., Cheng Zhao
Colouring, Covering, Reconstruction, And 3-To-1 Maps Of Graphs., Cheng Zhao
Graduate Theses, Dissertations, and Problem Reports (ETD)
There are five chapters in this thesis. In Chapter I, we present some frequently used definitions and notations, and describe the main results in this thesis. In Chapter II, edge-colouring and total colouring of graphs are discussed. The core {dollar}G\\sb{lcub}\\Delta{rcub}{dollar} is the subgraph of G induced by the vertices of maximum degree. If {dollar}G\\sb{lcub}\\Delta{rcub}{dollar} is a forest then Fournier (24) showed that G is Class 1. Therefore if G is Class 2, {dollar}G\\sb{lcub}\\Delta{rcub}{dollar} must contain cycles. A natural question is this: what is the chromatic index of G if {dollar}G\\Delta{dollar} is a union of vertex disjoint cycles? Further information about …
Effects Of Two Methods Of Recall Enhancement On Child And Adult Eyewitness Testimony., Catherine Martin Miller
Effects Of Two Methods Of Recall Enhancement On Child And Adult Eyewitness Testimony., Catherine Martin Miller
Graduate Theses, Dissertations, and Problem Reports (ETD)
This study examined the relative effectiveness of two recall-enhancement procedures designed to increase the completeness and accuracy of eyewitness testimony, the Cognitive Interview and the use of Visual Props. Sixty-four subjects (32 college-age subjects and 32 7-10 year-olds) viewed two separate videotapes of simulated crime situations. After 48 hours, subjects were interviewed in two separate trials, first with a baseline minimal prompting procedure and second with one of the two training interviews. In both situations, accuracy was tested via free recall, cued recall (structured questionnaire), and recognition (photographic line-up) formats. Results indicate that both free and cued recall were significantly …
Simultaneous Diatonic Harmonic Contexts In Early Twentieth Century Music., Virginia Yvonne Cox
Simultaneous Diatonic Harmonic Contexts In Early Twentieth Century Music., Virginia Yvonne Cox
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this dissertation is (1) to develop a method for the analysis of simultaneous diatonic harmonic contexts, and (2) to apply this method of the analysis of selected musical examples from the early twentieth century that illustrate a variety of applications of this compositional feature. The procedures for the analyses of simultaneous diatonic harmonic contexts involve (1) parsing of compositions to locate simultaneous diatonic harmonic contexts, (2) analysis of the individual contexts, and (3) analysis of the interaction of the simultaneous contexts. The examples selected for the illustrations were composed by some of the earliest, well-known exponents of …
A Study Of Coordinating Mechanisms Between External Degree Programs And Off-Campus Library Services As Perceived By External Degree Program Administrators., Andrew Charles Corrigan
A Study Of Coordinating Mechanisms Between External Degree Programs And Off-Campus Library Services As Perceived By External Degree Program Administrators., Andrew Charles Corrigan
Graduate Theses, Dissertations, and Problem Reports (ETD)
This study examined four types of coordination between external degree programs and off-campus library services as perceived by external degree program administrators. To examine these perceptions, a Library Assessment Survey was designed to assess coordination and administrator satisfaction relating to three of the four types of coordination examined. The survey, which was sent to 104 institutions, was also designed to indicate loose or tight organizational coupling with regard to the types of coordination. Results. Administrators from 68 institutions in 27 states responded to the survey. Data indicated that the administrators perceived: a moderate frequency of discussion with librarians; no formal …
Inter-Regional Tax Incidence With Public Services: A General Equilibrium Analysis., Sudha Subrahmanyam
Inter-Regional Tax Incidence With Public Services: A General Equilibrium Analysis., Sudha Subrahmanyam
Graduate Theses, Dissertations, and Problem Reports (ETD)
My research investigates the consequences for equity between and within the regions of an economy when one region alters its taxing policy, and the tax change results in a corresponding change in public expenditure. In contrast to extant theory, I incorporate the effects of an accompanying change in public expenditure on tax incidence in my analysis. I demonstrate that actual tax incidence may be quite different from current predictions because the pattern of change in public expenditure has a significant effect on the ultimate incidence of a tax change. I develop a methodological framework to identify the impact of tax …
A Study Of The Biology Of Phyllocoptes Fructiphilus Keifer, And Its Ability To Transmit Rose Rosette Disease To Multiflora Rose, Rosa Multiflora Thunb., Abdullah Kassar
A Study Of The Biology Of Phyllocoptes Fructiphilus Keifer, And Its Ability To Transmit Rose Rosette Disease To Multiflora Rose, Rosa Multiflora Thunb., Abdullah Kassar
Graduate Theses, Dissertations, and Problem Reports (ETD)
The eriophyid mite Phyllocoptes fructiphilus is the vector of rose rosette disease (RRD). The mite occurs naturally on several wild roses and on multiflora rose. P. rosarum is a related eriophyid mite found on multiflora and other rose plants. A successful mass rearing program was developed and a rearing arena designed to allow observation of individual mites. Biological studies were conducted of both mites including life history, sex ratio, hibernation site, effect of temperature on egg laying and rate of development, and host range. Effect of relative humidity on P. rosarum was studied. Transmission trials were conducted both in the …
Foot-In-The-Door And Cancer Prevention, Danielle J. Dolin
Foot-In-The-Door And Cancer Prevention, Danielle J. Dolin
Graduate Theses, Dissertations, and Problem Reports (ETD)
Foot-in-the-door (FITD) technique was applied to a health care setting to determine if this compliance method could be used toward increasing cancer prevention rates. Self-perception was used as the theoretical explanation for the FITD technique. Subjects were mall merchants attending the setting during two days of a scheduled area health fair. Two groups were run. One cell received both a first and second request (the FITD cell), while the control cell received only the second request. As expected, statistically significant effects indicated higher compliance rates of the FITD group. Attitude measures concerning the general topic of prevention and the topic …
School-Based Community Service: A Descriptive Analysis Of Four High School Programs., David Richard Procter
School-Based Community Service: A Descriptive Analysis Of Four High School Programs., David Richard Procter
Graduate Theses, Dissertations, and Problem Reports (ETD)
The study evaluated the panegyrical claims for high school-based community service programs. Four high school programs from three different states were selected to represent public, private-parochial, single and mixed gender, urban, suburban, and rural orientations. A repeated measure quantitative research design was developed and implemented as well as a qualitative study involving student and teacher/coordinator interviews. A survey instrument consisting of three scales--Social Isolation, Powerlessness, and Political Efficacy--was administered to experimental groups of student volunteers in each of four schools before and after programs involving student participation in community activities. The time periods between pre and post-tests ranged from one …
The Effects Of Ericksonian Resource Retrieval On Musical Performance Anxiety., Joseph John Richard
The Effects Of Ericksonian Resource Retrieval On Musical Performance Anxiety., Joseph John Richard
Graduate Theses, Dissertations, and Problem Reports (ETD)
The therapeutic approach Ericksonian Resource Retrieval (ERR) is compared to a proven technique for the reduction of musical performance anxiety (MPA) with college student musicians (n = 21) during the jury process. ERR is a technique which utilizes previous life experiences in dealing with future performance. Measures included: the Cognitive Strategies Assessment (CSA), the Personal Report of Confidence as a Performer (PRCP), the A-State Scale (STAI) and Jury Scores (JS). The ERR treatment group demonstrated significant reduction of MPA on both the PRCP and STAI. Also, a screening instrument for MPA (the MPSI) is developed (n = 104) which evidenced …
The Relationships Among Teachers' Immediacy Behaviors, Credibility, And Social Style And Students' Motivation And Learning: Comparisons Among Cultures., Catherine Ann Thompson
The Relationships Among Teachers' Immediacy Behaviors, Credibility, And Social Style And Students' Motivation And Learning: Comparisons Among Cultures., Catherine Ann Thompson
Graduate Theses, Dissertations, and Problem Reports (ETD)
Recent research offers insight concerning the roles of teachers' verbal immediacy, nonverbal immediacy, and credibility in American classrooms, but little work has been done to test the universal effects of these constructs. The primary purpose of this research was to extend previous research by comparing in different cultural groups the relationships among students' perceptions of teachers' immediacy, credibility, and social style in relation to students' perceptions of their own motivation and learning. Relationships among students' perceptions of teachers' verbal immediacy, nonverbal immediacy, competence, character, assertiveness, and responsiveness and students' motivation, cognitive learning, affective learning, and behavioral learning as well as …
Yield Pillar Design For United States Longwall Mining., Po Tsang
Yield Pillar Design For United States Longwall Mining., Po Tsang
Graduate Theses, Dissertations, and Problem Reports (ETD)
The longwall mining in U.S. has continuously set both the world production and safety records over the years. In order to ensure the future success of longwall mining, continuous improvement on this new mining technology is very important. This study deals with the problems related to longwall pillar design by proposing a new pillar design method based on the "yield pillar" concept. In order to simplify the geological and mining conditions, the new pillar design method classifies the in-situ roof and floor conditions into four different categories: (1) strong roof and strong floor, (2) strong roof and weak floor, (3) …
Coanda Effect Jet Around A Cylinder With An Interacting Adjacent Surface., Randolph Allen Churchill
Coanda Effect Jet Around A Cylinder With An Interacting Adjacent Surface., Randolph Allen Churchill
Graduate Theses, Dissertations, and Problem Reports (ETD)
The effects of placing a plane solid surface in close proximity to a Coanda effect jet turning over a cylindrical surface are investigated to help judge the possible application of this type of jet to manufacturing line processes. The Coanda jet is proposed as a coating control mechanism for fluidic coatings on sheets or a particulate removal device. A Coanda jet placed close to a surface will develop a strong tangential flow that will shear by viscous effects and pressure gradients. A turbulent k-{dollar}\\varepsilon{dollar} finite element model, developed in FIDAP, is presented that studies the effects of cylinder-sheet separation distance …
Acquisition Of Word Concept In Two Kindergarten Classrooms., Elwin Leonard Dickerson
Acquisition Of Word Concept In Two Kindergarten Classrooms., Elwin Leonard Dickerson
Graduate Theses, Dissertations, and Problem Reports (ETD)
This study explored how differing teaching methodologies affect word concept development during the first semester of kindergarten. Comparing fourteen kindergarten students matched on age, concepts about print, cognitive level and home factors in kindergartens differing in teaching philosophy, the researcher administered tasks to assess development of concept of word. Those tasks structured to assess word concept development, were administered every other week. Clay's "Concepts About Print" (CAP) task provided the pre- and post test assessment. The seven students exposed to a holistic philosophy and seven students exposed to a skill building philosophy demonstrated no significant differences when their word concept …
Secondary Dust Generation In Rotary Coal Cutting., Danqing Xu
Secondary Dust Generation In Rotary Coal Cutting., Danqing Xu
Graduate Theses, Dissertations, and Problem Reports (ETD)
In a rotary coal cutting system, the mined coal has to be transported through the cutting path. This transportation of mined coal through the cutting zone of a rotary cutting head is comparable to a rotary grinder. In the "grinder", the mined coal particles are subjected to secondary comminution, known as regrinding. A significant amount of coal dust could be generated during regrinding. This study was undertaken to investigate the mechanisms of regrinding and dust generation, to quantify the amount of dust generated during regrinding and evaluate the effects of influencing parameters on dust generation. Three comminution mechanisms of particles …
Formulation And Implementation Of A Large-Scale Work Scheduling Algorithm For Underground Coal Mines., Shiquan Yuan
Formulation And Implementation Of A Large-Scale Work Scheduling Algorithm For Underground Coal Mines., Shiquan Yuan
Graduate Theses, Dissertations, and Problem Reports (ETD)
The assignment of available workers to prioritized jobs on a shift basis is one of the most important and difficult decisions for the managers of underground coal mines. The objective of this study was to develop a work scheduling algorithm to handle the worker assignment problem in an efficient and practical way. The study basically consisted of three parts. The first part concerned the development of a mathematical programming model to handle the worker assignment problem. A goal programming model was developed first, and was converted a zero-one linear programming model which allows more flexibility in coping with various situations …
Transformative Teachers: Lives Of Passion And Purpose., Laura Van Vorhis
Transformative Teachers: Lives Of Passion And Purpose., Laura Van Vorhis
Graduate Theses, Dissertations, and Problem Reports (ETD)
This heuristic, cross-cultural study explored how transformative teachers embody, nurture, and convey their pedagogical purposes in the classroom. Transformative teachers challenge the status quo in an area of personal importance, whether it be teacher-student relationships, teaching for social change, teaching for personal growth and meaning, or teaching beyond traditional academic standards. Participants included eight secondary and post-secondary teachers from North America and Lithuania. Because participants were selected through a student nomination process as being educators who inspired learners to change personal circumstances, join a political or social movement, or develop a purpose in life, they represented not only different academic …