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Articles 1681 - 1710 of 2808
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Preventing Solidification Defects In Large Superalloy Castings Used In Advanced Electric Power Systems, Jairo Antonio Valdes Ortiz
Preventing Solidification Defects In Large Superalloy Castings Used In Advanced Electric Power Systems, Jairo Antonio Valdes Ortiz
Graduate Theses, Dissertations, and Problem Reports (ETD)
The need for clean and affordable power has resulted in great demand for high-efficiency gas turbine power systems. To improve energy generation efficiency, and lower CO2 emissions, the new generation of land based gas turbines needs to be larger and operated at a higher temperature. Consequently, it is required the use of Nb-containing superalloys such as Inconel 718 for the rotor disk, to avoid overaging of the microstructure during the forging process, but its applicability is being limited by difficulties in the reliable production of large Vacuum Arc Remelting (VAR) ingots (33 to ∼35 in. diameter) without macrosegregation defects such …
The Effects On The Antimicrobial Properties Of Hoshino's Triple Antibiotic Paste When Chlorhexidine Gluconate (0.12%) Is Substituted For The Propylene Glycol And Macrogol Ointment Mixture, Spencer R. Stiles
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this in vitro agar-diffusion study was to evaluate the effect on the antimicrobial efficacy of Hoshino's triple antibiotic paste when 0.12% chlorhexidine gluconate is substituted for the traditional propylene glycol and macrogol ointment carrier solution. Ciprofloxacin (200 mg), metronidazole (500 mg), and minocycline (100 mg), were mixed with either chlorhexidine or a 1:1 combination of propylene glycol and macrogol ointment. Seven microorganisms, including: E. coli, P. aeruginosa, S. aureus, E. faecalis, S. sanguis, F. nucleatum, and C. albicans, were incubated and plated onto triplicate blood agar plates. Two blank paper discs were positioned onto each agar plate, …
Justifying Phytogenic Feed Additive Matrix Values In Conjunction With Exogenous Feed Enzymes, Laurel K. Shires
Justifying Phytogenic Feed Additive Matrix Values In Conjunction With Exogenous Feed Enzymes, Laurel K. Shires
Graduate Theses, Dissertations, and Problem Reports (ETD)
Phytogenic feed additives are purported to possess antimicrobial properties as well as nutrient sparing characteristics that may aid in alleviating high diet costs; however, in order for PFAs to assist nutritionists in decreasing diet cost, matrix values must be determined and implemented in feed formulation. Study 1 evaluated proposed matrix values for a commercially available PFA and assessed nutrient sparing when the product was combined with commercial phytase, carbohydrase and protease. The most remarkable proposed matrix values were 32.2 kcal/kg for metabolizable energy and 0.07% for both Ca and AP. The objective of Study 2 was to determine true amino …
Calcium/Magnesium Ratio And Water Potential Effects On Forage Quality And Pectin Concentration, Rishi Prasad
Calcium/Magnesium Ratio And Water Potential Effects On Forage Quality And Pectin Concentration, Rishi Prasad
Graduate Theses, Dissertations, and Problem Reports (ETD)
Forage quality is an important parameter in animal nutrition and depends partly on soil fertility and moisture. Acidic soil pH and low soil moisture are known to decrease forage yield and quality. Liming is a common practice to correct the soil pH. Addition of lime not only improves the availability of nutrients but at the same time adds to the native calcium and magnesium present in the soil. Calcium and magnesium are identified as essential secondary macronutrients known to influence plant's physiological process. The objective of this experiment was to determine the effect of molar combinations of Ca:Mg ratio in …
The Use Of Microbial Community Fingerprinting As A Marker For Tracking The Source Of Water: Application To Pathogen And Groundwater Source Tracking, Mary Clement
Graduate Theses, Dissertations, and Problem Reports (ETD)
Microbial community structure in groundwater is extremely complex and constitutes a fingerprint of water. Terminal restriction fragment length polymorphism (T-RFLP) analysis is a polymerase chain reaction (PCR)-based fingerprinting method that is commonly used for comparative microbial community analysis, and to track specific bacterial markers in complex environments.;The Objective of this research was to propose an innovative approach for tracking the origin of groundwater, microbial source tracking and origin of surface water, based on the specific structure of the microbial community using T-RFLP analysis, which can be used for microbial source tracking.;The first specific aim was to validate the use of …
Do Parental Monitoring Strategies, Parental Knowledge, And Adolescent Risk -Taking Differ Based On Family Income And Parental Marital Status? The Role Of Resiliency, Shawn M. Golden-Llewellyn
Do Parental Monitoring Strategies, Parental Knowledge, And Adolescent Risk -Taking Differ Based On Family Income And Parental Marital Status? The Role Of Resiliency, Shawn M. Golden-Llewellyn
Graduate Theses, Dissertations, and Problem Reports (ETD)
Adolescents living in low socioeconomic status (SES) are more likely to engage in risk-taking behaviors, such as alcohol and other drug use, sexual behavior, and vandalism. Resiliency theory suggests that protective factors could reduce adolescent risk-taking in low SES families. Parental monitoring, parent behaviors involved in tracking their adolescents' whereabouts and activities, tends to be less evident in low SES families. However, it has also been identified as a protective factor in fostering resiliency in adolescents living in high-risk situations. The current study examined group differences in parental knowledge, parental monitoring strategies, and adolescent risk-taking based on two socioeconomic factors, …
Institutions, Interest Groups, And Gun Control Policy: A Comparative Study Of Focusing Events, Anthony Fleming
Institutions, Interest Groups, And Gun Control Policy: A Comparative Study Of Focusing Events, Anthony Fleming
Graduate Theses, Dissertations, and Problem Reports (ETD)
This dissertation discusses the importance of firearms related focusing events in two states: the United States and Canada. It is my contention that focusing events can lead to items being placed on the agenda; however, interest group activity can either impede or promote the policy outcomes due to the event.;I argue that in the United States firearms related focusing events often lead to new policy being placed on the agenda when there is a Democratic government; however, due to the diffuse nature of the American political system and the presence of the NRA (a staunchly status quo group) policy rarely, …
Differences In Learning Styles And Satisfaction Between Traditional Face-To-Face And Online Web-Based Sport Management Studies Students, Ellen Jo West
Differences In Learning Styles And Satisfaction Between Traditional Face-To-Face And Online Web-Based Sport Management Studies Students, Ellen Jo West
Graduate Theses, Dissertations, and Problem Reports (ETD)
Each student has a unique learning style or individual way of perceiving, interacting, and responding to a learning environment. The purpose of this study was to identify and compare the prevalence of learning styles among undergraduate Sport Management Studies (SMS) students at California University of Pennsylvania (Cal U). Learning style prevalence was determined for traditional face-to-face students and online web-based students and differences in learning style prevalence between these two groups were explored. Finally, differences in student satisfaction between program delivery methods were examined by using an online questionnaire designed by the researcher.;The population for this study included 247 Cal …
Empirical Analysis Of Bwt-Based Lossless Image Compression, Kalyan Varma Bhupathiraju
Empirical Analysis Of Bwt-Based Lossless Image Compression, Kalyan Varma Bhupathiraju
Graduate Theses, Dissertations, and Problem Reports (ETD)
The Burrows-Wheeler Transformation (BWT) is a text transformation algorithm originally designed to improve the coherence in text data. This coherence can be exploited by compression algorithms such as run-length encoding or arithmetic coding. However, there is still a debate on its performance on images. Motivated by a theoretical analysis of the performance of BWT and MTF, we perform a detailed empirical study on the role of MTF in compressing images with the BWT. This research studies the compression performance of BWT on digital images using different predictors and context partitions. The major interest of the research is in finding efficient …
The Effect Of Aging And Resveratrol Supplementation On Bone Mass And Strength In Hindlimb Suspended Male Rats, Stephanie Wright
The Effect Of Aging And Resveratrol Supplementation On Bone Mass And Strength In Hindlimb Suspended Male Rats, Stephanie Wright
Graduate Theses, Dissertations, and Problem Reports (ETD)
Resveratrol has recently become a popular dietary supplement because of its potential for reducing the effects of aging and various age-related diseases. However, few studies have investigated the role of resveratrol in improving bone loss associated with aging. It has been widely reported that mechanical unloading increases bone loss. The elderly experience a prevalence of reduced mechanical loading due to declining activity levels and increased incidence of bed rest. In rats, hind-limb suspension (HLS) simulates mechanical unloading of bone. Therefore, the objective of this study was to examine the effects of aging and resveratrol supplementation on bone health in HLS …
Ve-Cadherin Expression And Regulation Of Sensitivity To Apoptosis In Philadelphia Chromosome Positive Acute Lymphoblastic Leukemia, Heather A. O'Leary
Ve-Cadherin Expression And Regulation Of Sensitivity To Apoptosis In Philadelphia Chromosome Positive Acute Lymphoblastic Leukemia, Heather A. O'Leary
Graduate Theses, Dissertations, and Problem Reports (ETD)
The bone marrow microenvironment serves as the primary site for post-natal hematopoiesis allowing for HSC development and maturation. More specifically, B lineage cells rely on key signals from both the physical and soluble components of the marrow for their survival and maturation. In addition to normal hematopoiesis the bone marrow has been shown to be a sanctuary for leukemic cells, as well as other tumors, that can interact with cues from the microenvironment allowing for their protection during chemotherapy. The studies described in this dissertation focus on two supportive components of the bone marrow microenvironment, osteoblasts and bone marrow stromal …
Comparing The Use Of Qpcr On Isolated Smallmouth Bass (Micropterus Dolomieu) And Rainbow Trout (Oncorhynchus Mykiss) Hepatocytes For Estrogen Screening, Emily Breana Chambers
Comparing The Use Of Qpcr On Isolated Smallmouth Bass (Micropterus Dolomieu) And Rainbow Trout (Oncorhynchus Mykiss) Hepatocytes For Estrogen Screening, Emily Breana Chambers
Graduate Theses, Dissertations, and Problem Reports (ETD)
Exposure of fish to estrogenic endocrine disrupting chemicals (EEDCs) is believed to be a contributing factor of intersex (the presence of immature oocytes in the testes) and fish kills in the Potomac and Shenandoah Rivers. EEDCs are often seen in the effluent of wastewater treatment plants. A simple and common way to look at the estrogenicity of water samples is to deploy Passive Organic Chemical Integrative Samplers (POCIS) and extract the hydrophilic compounds from the filters with methanol. Samplers were deployed upstream and downstream of two wastewater treatment plants, one on the Conococheague River and one on the Monocacy River, …
Heavy-Duty Diesel Engine Oil Aging Effects On Emissions, Mrinmoy Dam
Heavy-Duty Diesel Engine Oil Aging Effects On Emissions, Mrinmoy Dam
Graduate Theses, Dissertations, and Problem Reports (ETD)
Diesel engines are highly reliable, durable and are used for wide range of applications with low fuel usage owing to its higher thermal efficiency compared to other mobile power sources. Heavy-duty diesel engines are used for both on-road and off-road applications and dominate the heavy-duty engine segment of the United States transportation market. However, diesel engine exhaust emissions affect the ambient air quality by producing higher levels of oxides of nitrogen (NOx) and particulate matter (PM) compared to other mobile sources. New diesel engines produce significantly lower levels of PM and NOx emissions to comply with 2010 EPA emission limits …
Vibrant Amusement, Bretton J. Kern
Vibrant Amusement, Bretton J. Kern
Graduate Theses, Dissertations, and Problem Reports (ETD)
This thesis is a description and analysis of the ceramic work of Bretton J. Kern. This thesis includes a description and images of the work as well as a discussion of the technical and conceptual content of the work.
Polycystic Ovarian Syndrome: Proposal For An Evidence -Based Management Plan For An Electronic Patient Record System, Mary Elizabeth Durant
Polycystic Ovarian Syndrome: Proposal For An Evidence -Based Management Plan For An Electronic Patient Record System, Mary Elizabeth Durant
Graduate Theses, Dissertations, and Problem Reports (ETD)
The goal of this change project was to improve the diagnosis and management of women with polycystic ovarian syndrome (PCOS) through the use of an electronic patient record system. PCOS is one of the top ten missed or delayed diagnoses as well as an inconsistently or mismanaged women's health issue in primary care.;The chronic care model, known pathophysiology, and evidence-based research composed the framework used in developing the diagnosis and management plan for an electronic record system in a free health care clinic.;The project was evaluated based on the following four objectives: (1) To provide an educational session at a …
School Improvement From The Central Office: A View Of The Five Year School System Strategic Planning Process In Selected West Virginia Counties, Victor V. Fisher
School Improvement From The Central Office: A View Of The Five Year School System Strategic Planning Process In Selected West Virginia Counties, Victor V. Fisher
Graduate Theses, Dissertations, and Problem Reports (ETD)
This study's purpose was to describe and develop understandings of the West Virginia Five Year School System Strategic Plan development process in selected counties. A qualitative design of a multiple site case study was chosen because of its ability to interpret and understand process. Strategic planning is intended to be a state mandated process for school districts that results in improved student, school, and school system performance. These four nominated districts used a common style and process of consensus building and decision-making. Facilitators and barriers to the process were identified. Facilitators are described in a context of teaming and consensual …
The Great American Debate: A Constructionist Approach On The Media's Coverage Of Government Bailouts, Meghan Danielle Hvizdos
The Great American Debate: A Constructionist Approach On The Media's Coverage Of Government Bailouts, Meghan Danielle Hvizdos
Graduate Theses, Dissertations, and Problem Reports (ETD)
Historically, the term "bailout" has been used to define the rescuing of an organization in financial distress. A rescue implies that a bailout is voluntary. However, by all accounts, the bailouts in the past nine months have not been voluntary. Media outlets are using the words 'bailout' and 'rescue' interchangeably. Through claims-making and by using the words rescue and bailout interchangeably, the media has socially constructed the word rescue as synonymous with the word bailout and has implied that the bailouts were voluntary and necessary to avert economic disaster and have constructed a social problem. This paper will examine the …
The Once And Future Steel Town: The Narrative Identities Of A Local Community, Jason R. Rine
The Once And Future Steel Town: The Narrative Identities Of A Local Community, Jason R. Rine
Graduate Theses, Dissertations, and Problem Reports (ETD)
This thesis examines the changing identity of a local community, Weirton, West Virginia, in terms of narratives shared by members of that community. Weirton was home to Weirton Steel, one of the largest steel mills in the United States. Since 1909, when Weirton Steel was founded, the mill provided residents with a narrative. However, this is starting to charge. With Weirton Steel's final closure on the horizon, Weirton will lose the main defining characteristic it has relied on throughout the years. In order for the community to maintain its unity, it must now create a new collective narrative. The research …
From Bigfoot In The Backyard To Ghosts In The Attic: Predictors Of Paranormal Belief, Jeff Tranguch
From Bigfoot In The Backyard To Ghosts In The Attic: Predictors Of Paranormal Belief, Jeff Tranguch
Graduate Theses, Dissertations, and Problem Reports (ETD)
Previous research on the social predictors of paranormal belief is contradictive and unclear. Depending on which author you read, one theory is better at explaining why individuals accept belief in paranormal phenomena. This problem most likely is the result of weak sample sizes and an inconsistency in defining and measuring the paranormal. This thesis incorporates data from the 2005 Baylor Religion Survey which is one of the largest, most recent data sets assessing paranormal belief. Three predominant theories within the literature are tested. Findings lend support to the marginalization theory claiming that individuals who are marginalized from society tend to …
Essays On The Public Economics Of Health, Rachel L. Mathers
Essays On The Public Economics Of Health, Rachel L. Mathers
Graduate Theses, Dissertations, and Problem Reports (ETD)
This dissertation explores three important health issues, utilizing the tools provided by economics to provide new insight into areas of research typically the parlance of those in medical fields of study. The integration of economic theory into existing literature on health issues provides a more detail-rich explanation of health policy and corresponding health outcomes. This dissertation applies economic theory to the health topics of skin cancer, Female Genital Mutilation (FGM), and AIDS. There are five chapters included in this dissertation, beginning with an introduction in Chapter 1. Chapter 2 addresses the skin cancer paradox, specifically analyzing the relationship between National …
Amine Promoted Asymmetric Cascade Synthesis Of Highly Functionalized Heterocycles, Cheng Zhong
Amine Promoted Asymmetric Cascade Synthesis Of Highly Functionalized Heterocycles, Cheng Zhong
Graduate Theses, Dissertations, and Problem Reports (ETD)
Enantioselective intermolecular crossed-conjugate additions between nitroalkenes and alpha,beta-enals through a dual. Enantioselective intermolecular crossed-conjugated additions between nitroalkenes and enals were developed through Lewis base and iminium cation dual activation strategy. The optimal condition was suitable for a large group of nitroalkenes and enals with excellent yields and e.e.. Further derivatization led two diastereomers into single enantiomers of substituted pyrrolidine with excellent stereochemistry retention.;One-pot cascade Michael-Michael-Aldol condensation for diastereoselective synthesis of nitro-substituted cyclohexanes. A one-pot Michael-Michael-Aldol cascade reaction of proline Lewis base activated nitroalkenes and enones was developed for the preparation of nitro-vinyl-substituted cyclohexanes. Good yields and diastereoselectivity were observed. Further …
Nondestructive Evaluation Of Thermal Barrier Coating Systems Using Ultrasonic Techniques, Binwei Zhang
Nondestructive Evaluation Of Thermal Barrier Coating Systems Using Ultrasonic Techniques, Binwei Zhang
Graduate Theses, Dissertations, and Problem Reports (ETD)
Nondestructive evaluation (NDE) as a diagnostic tool has been extensively used to inspect the integrity of structure members. In the energy sector, the pre-mature failure of the protective Thermal Barrier Coating (TBC) covering the turbine blade can cause the structural metal base of the blade to be exposed at extremely high temperature fluids, thus reduce the service life. It is highly necessary that an NDE technique be developed for effective inspection of the thermal barrier coated turbine blade.;The ultrasonic Pulse-Echo and Pitch/Catch techniques were used to test the TBC coupons nondestructively after each thermal exposure. The Pulse-Echo traveling time and …
Using Wenger's Social Theory Of Learning To Examine University Teachers' Understanding Of How Instructional Technology Affects Their Experience In Practice, Laura L. Adams
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this study was to take an exploratory look at how university teachers come to understand their experience in educational practice and their professional role as teachers who integrate instructional technology into their coursework using the framework provided by Wenger's Social Theory of Learning. University faculty who teach in a college of education that integrate instructional technology into their courses were important to inform this study.;Qualitative research methods were used to gather data that was collected from (1) university teachers' engagement in an annual instructional technology professional development activity and (2) eight participants who teach in a college …
Utilization Of The Seven Principles For Good Practice In Undergraduate Education In General Chemistry By Community College Instructors, Jennifer Panther Bishoff
Utilization Of The Seven Principles For Good Practice In Undergraduate Education In General Chemistry By Community College Instructors, Jennifer Panther Bishoff
Graduate Theses, Dissertations, and Problem Reports (ETD)
In recent years, higher education has undergone many changes. The advent of assessment, accountability, and a newfound focus on teaching have required faculty to examine how they are teaching. Administrators and faculty are beginning to recognize that learning is not a "one size fits all" enterprise. To this end, Chickering and Gamson developed an inventory that examined faculty utilization of the Seven Principles of Good Practice in Undergraduate Education. The seven principles included by the authors included faculty-student interaction, cooperative learning, active learning, giving prompt feedback, emphasizing time on task, communicating high expectations, and respecting diverse talents and ways of …
Language Learning In Three Early Childhood Programs In Austria, Germany And The United States, Sandra Schoder
Language Learning In Three Early Childhood Programs In Austria, Germany And The United States, Sandra Schoder
Graduate Theses, Dissertations, and Problem Reports (ETD)
In 2002 the European Union declared multilingualism and life-long language learning to be two goals that it will pursue for its citizens. As a result, member states have introduced language learning at the elementary school level, and have shown an ever increasing interest in implementing second language programs designed specifically for children under the age of seven. This is a welcome change for European educators who are already working in early childhood language programs or who plan to establish new programs and have been looking for support for their endeavors. Yet despite recent progress, scholarly research into this arena remains …
Basin Analysis And Aqueous Chemistry Of Fluids In The Oriskany Sandstone, Appalachian Basin, Usa, Jamie C. Skeen
Basin Analysis And Aqueous Chemistry Of Fluids In The Oriskany Sandstone, Appalachian Basin, Usa, Jamie C. Skeen
Graduate Theses, Dissertations, and Problem Reports (ETD)
The Oriskany Sandstone of the Appalachian basin is a widely distributed saline aquifer which has produced large quantities of hydrocarbons. Currently the Oriskany is host to numerous gas storage fields and is a potential target for large-scale geologic storage of CO2. Published and unpublished data of rock characteristics, pressure, temperature, and formation water geochemistry, along with new brine samples were integrated within a geographical information system to better understand the regional-scale hydrogeological regime and its relation to geologic CO2 sequestration potential. The up-dip flow of the Oriskany Sandstone formation waters is generally controlled by outcrops at high elevation to the …
Evaluation Of Information Transfer Between Beef Producers And Extension Agents In West Virginia, Travis J. Cullen
Evaluation Of Information Transfer Between Beef Producers And Extension Agents In West Virginia, Travis J. Cullen
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this study was to determine how information passes between beef producers and Extension Agents in West Virginia in the areas of teaching methods and program advertisement. A descriptive research design was used to collect the data for this study. The target population was all beef producers and the Agriculture and Natural Resource Extension Agents in West Virginia. The study found that beef producers and Extension Agents tend to be in agreement on both the methods of advertising and teaching. However, the programs beef producers desire differs from those the West Virginia University Extension Service offers.
Enhanced Coal Bed Methane Production And Sequestration Of Carbon Dioxide In Unmineable Coal Seams., Camilo E. Calderon
Enhanced Coal Bed Methane Production And Sequestration Of Carbon Dioxide In Unmineable Coal Seams., Camilo E. Calderon
Graduate Theses, Dissertations, and Problem Reports (ETD)
The process of modeling reservoirs that are controlled by desorption such as Coal Bed Methane has always been challenging due to the complexities associated with flow of fluids in these types of reservoirs. These complexities become more notable while the injection process is taking place since interaction between the injected gas alters the coal properties with respect to time. This manuscript summarizes the results of a study that includes reservoir simulation and modeling efforts that are focused on natural gas production and subsequent CO2 injection into an unmineable coal seam in the Marshall Country West Virginia. Two coal seams (Pittsburgh …
Numerical Modeling Of Near-Surface Carbon Dioxide Migration With Barometric Pumping Effects., Guoxiang Liu
Numerical Modeling Of Near-Surface Carbon Dioxide Migration With Barometric Pumping Effects., Guoxiang Liu
Graduate Theses, Dissertations, and Problem Reports (ETD)
With anthropogenic activities, the concentration of CO2 in the atmosphere has dramatically risen, very likely resulting in global warming and climate change. Capturing and disposing of the produced CO2 in geological formations can mitigate this problem provided that there is no substantial leakage from the subsurface back to atmosphere for hundreds of years. The detection of any CO2 leakage is essential to verify that the sequestration is effective, to initiate corrective actions if leakage is discovered, and to accurately assign storage credits in a "cap and trade" regulatory system. Natural fluctuations in atmospheric pressure are one factor that influences the …
The Evaluation Of Virulent And Hypovirulent Inocula Of The Chestnut Blight Fungus, Cryphonectria Parasitica, To Incite Infection And Spermatize Virulent Cankers., Shawn C. Kenaley
The Evaluation Of Virulent And Hypovirulent Inocula Of The Chestnut Blight Fungus, Cryphonectria Parasitica, To Incite Infection And Spermatize Virulent Cankers., Shawn C. Kenaley
Graduate Theses, Dissertations, and Problem Reports (ETD)
Transgenic hypovirulent (HV) strains of Cryphonectria parasitica [Murrill] M.E. Barr engineered to contain an infectious cDNA copy of Cryphonectria hypovirus 1 (Hypoviridae; CHV1) may provide an efficient mechanism to introduce hypoviruses into genetically heterogeneous populations of the chestnut blight fungus. However, elucidating the factors that affect the infection of chestnut and spread of C. parasitica is needed to fully utilize the potential of transgenic HV strains for the biological control of chestnut blight. In one study, three experiments were conducted at a forested site near Bartow, West Virginia. The seasonality of HV and virulent canker development was measured in the …