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Articles 1981 - 2010 of 5172
Full-Text Articles in Entire DC Network
Does Engagement In Pleasant Events Mediate The Relation Between Physical Disability And Affective Outcomes In Older Adults?, Patricia M. Bamonti
Does Engagement In Pleasant Events Mediate The Relation Between Physical Disability And Affective Outcomes In Older Adults?, Patricia M. Bamonti
Graduate Theses, Dissertations, and Problem Reports (ETD)
The current study examined potential mediators of the association between physical disability and depressive symptoms, along with positive mental health variables, including meaning in life and positive affect, within the framework of an empirically supported model of depression---the behavioral model of depression (Lewinsohn, 1985). The behavioral model of depression posits that reduced contact with positive reinforcement in the environment (i.e., engagement in pleasant events) precipitates and maintains depressive symptoms (Lewinsohn et al., 1985). Treatment studies have demonstrated the efficacy of interventions based on the behavioral model of depression in older adults (Cuijpers et al., 2007; Dimidjian et al., 2006; Hopko …
Analysis Of Rna Degradation In Dental Pulp To Estimate Postmortem Interval, Amanda Balasko
Analysis Of Rna Degradation In Dental Pulp To Estimate Postmortem Interval, Amanda Balasko
Graduate Theses, Dissertations, and Problem Reports (ETD)
There are several methods that are currently used to estimate a postmortem interval (PMI), including physiological, biochemical, entomological, and archeological approaches. However, these methods are not effective in estimating PMI's extending from several weeks to months. The study presented here was performed to create an independent, objective biological method to estimate PMI by analyzing the degradation of 18S ribosomal RNA (rRNA) from porcine and human dental pulp. If successful, this method would overlap and extend the current PMI estimation methods. With a concept similar to that of radioactive carbon-14 dating, this method analyzed two different sized segments -- one large, …
Telemonitoring To Change Standard Diabetes Education And Management In A Rural Healthcare Practice, Kendra L. Barker
Telemonitoring To Change Standard Diabetes Education And Management In A Rural Healthcare Practice, Kendra L. Barker
Graduate Theses, Dissertations, and Problem Reports (ETD)
Background: Type II Diabetes is associated with increased morbidity and mortality. Intense education and positive behavior reinforcement by healthcare professionals has been shown to enhance personal glycemic control for patients with Type II diabetes. However, limitations often prevent patient attendance at diabetes education classes. The purpose of this change project was to assess the efficacy of a telemonitoring intervention on glycemic control. Kotter's change process served as the conceptual underpinning for the project.;Objective: The overall objective was to implement a telemonitoring intervention based on Kotter's change process in a sample of adults with Type II diabetes who obtained care at …
A Midsummer Night's Dream: A Transformative Process, Jacob Bigelow
A Midsummer Night's Dream: A Transformative Process, Jacob Bigelow
Graduate Theses, Dissertations, and Problem Reports (ETD)
This thesis document is a written account of my design process from start to finish for a production of A Midsummer Night's Dream by William Shakespeare. This production was a product of West Virginia University; School of Theater & Dance, and was presented in the Gladys G. Davis Theater in the Creative Arts Center in Morgantown, WV; the performances dates were November 19th-21st and December 2nd-7th 2014. This document includes my analysis of the script, the steps of the design process, the execution of the design, and finally my analysis of the process.
Three Essays On Renewable Energy Policy And Its Effects On Fossil Fuel Generation In Electricity Markets, Eric Bowen
Three Essays On Renewable Energy Policy And Its Effects On Fossil Fuel Generation In Electricity Markets, Eric Bowen
Graduate Theses, Dissertations, and Problem Reports (ETD)
In this dissertation, I investigate the effectiveness of renewable policies and consider their impact on electricity markets. The common thread of this research is to understand how renewable policy incentivizes renewable generation and how the increasing share of generation from renewables affects generation from fossil fuels. This type of research is crucial for understanding whether policies to promote renewables are meeting their stated goals and what the unintended effects might be. To this end, I use econometric methods to examine how electricity markets are responding to an influx of renewable energy. My dissertation is composed of three interrelated essays. In …
Variable Data Collection Rate System For A Wildlife Behavior Monitor, Sheldon Blackshire
Variable Data Collection Rate System For A Wildlife Behavior Monitor, Sheldon Blackshire
Graduate Theses, Dissertations, and Problem Reports (ETD)
Behavior monitors typically collect data, and consequently spend energy, at fixed intervals. For devices that utilize energy harvesting, a fixed data collection interval may result in inefficient battery usage due to variability in available solar radiation. Work was performed for a system capable of adjusting a data collection rate, proportional to changes in battery charge, such that data obtained was maximized without sacrificing battery energy sustainability. Energy consumption, of an actual behavior monitor, was modeled to aid in design and evaluation of a changeable data collection rate system. Model validation was performed by comparing simulated to empirical data for battery …
The Modeling And Stability Analysis Of Humans Balancing An Inverted Pendulum, Yaohui Ding
The Modeling And Stability Analysis Of Humans Balancing An Inverted Pendulum, Yaohui Ding
Graduate Theses, Dissertations, and Problem Reports (ETD)
The control of an inverted pendulum is a classical problem in dynamics and control theory. Without active control, the inverted pendulum by itself is inherently unstable, thus serving as an ideal platform for control algorithms design and testing. This study utilizes an inverted pendulum setup to investigate the characteristics of manual control in executing a single-axial compensatory task. An inverted pendulum with sliding base on a single-axial rail was built for this purpose. Human subjects were asked to stabilize the pendulum by sliding the base on the rail. To mathematically quantify the characteristics of human manual control, a quasi-linear lead-lag …
Mission Design, Guidance, And Navigation Of A Callisto-Io-Ganymede Triple Flyby Jovian Capture, Alan M. Didion
Mission Design, Guidance, And Navigation Of A Callisto-Io-Ganymede Triple Flyby Jovian Capture, Alan M. Didion
Graduate Theses, Dissertations, and Problem Reports (ETD)
Use of a triple-satellite-aided capture maneuver to enter Jovian orbit reduces insertion DeltaV and provides close flyby science opportunities at three of Jupiter's four large Galilean moons. This capture can be performed while maintaining appropriate Jupiter standoff distance and setting up a suitable apojove for plotting an extended tour.;This paper has three main chapters, the first of which discusses the design and optimization of a triple-flyby capture trajectory. A novel triple-satellite-aided capture uses sequential flybys of Callisto, Io, and Ganymede to reduce the DeltaV required to capture into orbit about Jupiter. An optimal broken-plane maneuver is added between Earth and …
The Eccentricities Of A Fading Southern Belle: Personalizing The Iconic Role Of Amanda Wingfield In Tennessee Williams' "The Glass Menagerie", Stephanie Freeman
The Eccentricities Of A Fading Southern Belle: Personalizing The Iconic Role Of Amanda Wingfield In Tennessee Williams' "The Glass Menagerie", Stephanie Freeman
Graduate Theses, Dissertations, and Problem Reports (ETD)
This document chronicles, from the first read-through to the final curtain call, the process of diving into the role of Amanda Wingfield from Tennessee Williams' 'The Glass Menagerie'. It details my path toward character development (personalizing Amanda's point of view and drawing on others for inspiration), the rehearsal process, and ultimately how I couldn't help but be changed by the experience. The opportunity to play one of Tennessee Williams' most famous women brought with it a myriad of emotions at the start---from excitement (due to the fact that this was a dream come true for a thesis role)---to absolute incredulity …
A Comparative Study Of E-Tail Service Quality Scale In Usa And India, Usha K. Geddam
A Comparative Study Of E-Tail Service Quality Scale In Usa And India, Usha K. Geddam
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this research is to measure the e-tail service quality of online retailers by considering survey responses from two different geographical locations, USA and India. This research focuses primarily on (i) Collecting data and performing factor analysis to refine initial scale items, developed by Qianqian, followed by reliability tests for checking the scale's validity by considering responses received from survey participants in two different geographical regions; (ii) Testing of hypothesis based on the construct of the scale items of the initial scale and the scale obtained in this research; (iii) Performing regression analysis to demonstrate the impact of …
Clustering By Academic Major At Historically Black Colleges And Universities (Hbcus), Aaron Goodson
Clustering By Academic Major At Historically Black Colleges And Universities (Hbcus), Aaron Goodson
Graduate Theses, Dissertations, and Problem Reports (ETD)
Follow-up studies of clustering by academic major, the dynamic of 25% or more of the student-athletes on a roster pursuing the same academic major, indicate that it still occurs in revenue-generating sports (Fountain & Finley 2009, 2011; Otto, 2012). Clustering challenges the notion that student-athletes have control over their collegiate academic experience and reveals that their educational pursuits may not align with their professional goals or provide a meaningful educational experience (Sharp & Sheilley, 2008). Research on clustering is absent in member institutions of different NCAA divisions, institutions with unique missions and history (such as Historically Black Colleges and Universities …
"The Whistling Wife": Women And Popular Song In The Postbellum American South, Melanie J. Green
"The Whistling Wife": Women And Popular Song In The Postbellum American South, Melanie J. Green
Graduate Theses, Dissertations, and Problem Reports (ETD)
This study discusses the practice of music-making by middle and upper class women in the nineteenth-century American South, and the ways in which the practice was continued in the decades following the Civil War amid changing class and gender politics. The study examines two sheet music collections, one from the South and one from the North, dating from the 1880s and 1890s. An examination of the content of these collections reveals differing attitudes over changing class and gender politics and acceptable practices for music-making in the North and South. A discussion of these young women and their families tells their …
Metal Oxide Nanoparticles: The Importance Of Size, Shape, Chemical Composition, And Valence State In Determining Toxicity, Katherine Dunnick
Metal Oxide Nanoparticles: The Importance Of Size, Shape, Chemical Composition, And Valence State In Determining Toxicity, Katherine Dunnick
Graduate Theses, Dissertations, and Problem Reports (ETD)
Nanoparticles, which are defined as a structure with at least one dimension between 1 and 100 nm, have the potential to be used in a variety of consumer products due to their improved functionality compared to similar particles of larger size. Their small size is associated with increased strength, improved catalytic properties, and increased reactivity; however, their size is also associated with increased toxicity in vitro and in vivo. Numerous toxicological studies have been conducted to determine the properties of nanomaterials that increase their toxicity in order to manufacture new nanomaterials with decreased toxicity. Data indicates that size, shape, chemical …
Reversible Phospholipid Nanogels: An Alternative Matrix For Tunable High Resolution Dna Sieving With Enhanced Separation Efficiency And Accurate Extended Range Sizing By Capillary Gel Electrophoresis, Brandon C. Durney
Graduate Theses, Dissertations, and Problem Reports (ETD)
In an aqueous solution the phospholipids dimyristoyl-sn-glycero-3- phosphocholine (DMPC) and 1,2-dihexanoyl-sn-glycero-3-phosphocholine (DHPC) self-assemble to form thermo-responsive non-Newtonian fluids (i.e., pseudo-gels) in which small temperature changes of 5-6 °C decrease viscosity dramatically. This characteristic is useful for sieving-based electrophoretic separations (e.g., of DNA), as the high viscosity of linear sieving additives, such as linear polyacrylamide or polyethylene oxide, hinders the introduction and replacement of the sieving agent in microscale channels. While a practical advantage of utilizing phospholipid pseudo-gels for sieving is the ease with which they are introduced into the separation capillary, the separation performance of the material for DNA analyses …
Maopewa Iati Bi: Takai Tonqyayun Monyton "To Abandon So Beautiful A Dwelling": Indians In The Kanawha-New River Valley, 1500-1755, Isaac J. Emrick
Maopewa Iati Bi: Takai Tonqyayun Monyton "To Abandon So Beautiful A Dwelling": Indians In The Kanawha-New River Valley, 1500-1755, Isaac J. Emrick
Graduate Theses, Dissertations, and Problem Reports (ETD)
Maopewa iati bi is a Tutelo translation of William Byrd's eighteenth century quote "To abandon so beautiful a Dwelling." The quotes sets the stage for this examination of the indigenous landscape history of the eastern half of the Middle Ohio River Valley. The region, or Okahok amai, was the homeland of Siouan speakers, but passed from Siouan control into Iroquoian and Algonquian hands around turn of the eighteenth century. Not long afterward Indians, pressured by British and French citizens and governments, were forced to again fight to maintain their hard won new homes. By the middle of the eighteenth century, …
Design Programs For Highwall Mining Operations, Ming Fan
Design Programs For Highwall Mining Operations, Ming Fan
Graduate Theses, Dissertations, and Problem Reports (ETD)
Highwall mining is a hybrid of surface mining and underground mining methods, and is often the only feasible method to recover the coal reserves in the central Appalachian coalfields due to the steep terrain and the closely spaced multiple thin coal seams. Compared to the mountain-top-removal, contour, auger, and underground mining methods, application of the highwall mining method can reduce the environmental impacts, increase the recovery ratio of coal reserves, and enhance mine safety as well as productivity. Therefore, it is probable that highwall mining will be a dominant method for extracting the high-value coal resources in the Appalachian coalfields. …
A Bayesian Approach To Reduced Order Modeling In Catalytic Steam Reforming, Evan D. Ford
A Bayesian Approach To Reduced Order Modeling In Catalytic Steam Reforming, Evan D. Ford
Graduate Theses, Dissertations, and Problem Reports (ETD)
An investigation was conducted to determine the feasibility of developing a reduced order model capable of accurately predicting the behavior of steam methane reforming. An emerging model reduction technique based on examining causal relationships was applied to the reaction network developed by Xu and Froment to eliminate unnecessary intermediate species[1]. A dynamic discrepancy term was included in the reduced network to quantify the error incurred from the network reduction. This discrepancy is stochastic in nature, and a Markov Chain Monte Carlo (MCMC) sampling routine coupled with Bayesian statistical methods was used to calibrate the parameters of the discrepancy by comparison …
Evolution Of Z ~ 0 Luminous Compact Blue Galaxies, Katherine Rabidoux
Evolution Of Z ~ 0 Luminous Compact Blue Galaxies, Katherine Rabidoux
Graduate Theses, Dissertations, and Problem Reports (ETD)
Luminous compact blue galaxies (LCBGs) are bright (MB ≤ --18.5), blue (B -- V ≤ 0.6), massive (M* ∼ 10 9 M[special character omitted]) star-forming galaxies with high B-band surface brightnesses (SBe(B) ≤ 21.0) that were common at z ∼ 1 when the Universe was half of its current age, but are rare in the local Universe. In this thesis, I have conducted studies of the atomic neutral hydrogen (H I) and global star formation properties of a group of the rare z ∼ 0 analogs to the common z ∼ 1 LCBGs to better understand how this class of …
The Use Of Concept Mappingpattern Matching To Conceptualize The Desired Domain Of Student Learning In The First Year Of College, Jacob B. Sanwidi
The Use Of Concept Mappingpattern Matching To Conceptualize The Desired Domain Of Student Learning In The First Year Of College, Jacob B. Sanwidi
Graduate Theses, Dissertations, and Problem Reports (ETD)
This study conceptualized the desired domain of student learning in the first year of college as it pertains to a success program serving first-time, full-time undecided students at a land-grant and high research activity classified university. Trochim's Concept Mapping/Pattern Matching approach, an exploratory mixed methods research methodology, was used to collect and analyze data. The researcher sought the contribution of 23 participants including sixteen students, and seven faculty and staff members involved in the success program. As a group, participants generated 100 statements representing desired learning outcomes. They individually sorted the items into groups and rated them for relative importance …
Impact Assessment Of Facial Recognition Algorithms' Performance When Modifying Nose Dimensions, Jacob Wolen
Impact Assessment Of Facial Recognition Algorithms' Performance When Modifying Nose Dimensions, Jacob Wolen
Graduate Theses, Dissertations, and Problem Reports (ETD)
This work quantitatively measures the impact of modifying the nasal width and length dimensions, in a simulated plastic surgery, on the Facial Recognition algorithms, Principal Component Analysis (PCA), Linear Discrimination Analysis (LDA), and Local Binary Patterns Histogram (LBPH). This was integrated through the use of OpenCV. It was found that as the nose width increases beyond 40% its original width, there is an average decrease in facial recognition performance of up to 14%. It was also found that as the nose was modified vertically, there was less than a 3% decrease in performance for the facial recognition algorithms. These rates …
Pulsar Population Synthesis Using Palfa Detections And Pulsar Search Collaboratory Discoveries Including A Wide Dns System And A Nearby Msp, Joseph Karl Swiggum
Pulsar Population Synthesis Using Palfa Detections And Pulsar Search Collaboratory Discoveries Including A Wide Dns System And A Nearby Msp, Joseph Karl Swiggum
Graduate Theses, Dissertations, and Problem Reports (ETD)
Using the ensemble of detections from pulsar surveys, we can learn about the sizes and characteristics of underlying populations. In this thesis, I analyze results from the Pulsar Arecibo L-band Feed Array (PALFA) precursor and Green Bank Telescope 350 MHz Drift Scan surveys; I examine survey sensitivity to see how detections can inform pulsar population models, I look at new ways of including young scientists -- high school students -- in the discovery process and I present timing solutions for students' discoveries (including a nearby millisecond pulsar and a pulsar in a wide-orbit double neutron star system).;The PALFA survey is …
Mapping And Modeling Soil Organic Carbon In The Eastern Allegheny Plateau And Mountains Using Legacy Data, Katey M. Yoast
Mapping And Modeling Soil Organic Carbon In The Eastern Allegheny Plateau And Mountains Using Legacy Data, Katey M. Yoast
Graduate Theses, Dissertations, and Problem Reports (ETD)
The deeply dissected topography and diverse climate of the Eastern Allegheny Plateau and Mountains (Major Land Resource Area (MLRA) 127) create challenges for dynamicpedoecological modeling needed for ecosystem management adaptation to a changing climate. The spatial distribution of soil organic carbon (SOC), one of the most dynamic soil properties, has been previously estimated and mapped using the State Soil Geographical Database (STATSGO2) and the more detailed Soil Survey Geographic Database (SSURGO) for MLRA 127, estimating mean SOC to a depth of 1 m to be 2.60 and 4.40 kg m-2, respectively. Previous studies have shown that these approximations underestimate true …
New Experimental Approach To Measure Petrophysical Properties Of Organic-Rich Shales, Mehrdad Zamirian
New Experimental Approach To Measure Petrophysical Properties Of Organic-Rich Shales, Mehrdad Zamirian
Graduate Theses, Dissertations, and Problem Reports (ETD)
Production from hydrocarbon reservoirs is strongly dependent on the permeability of the formation. For decades, the permeability of conventional reservoirs, which are typically in milli-Darcy range, has been measured by the steady-state laboratory technique which provides accurate and fast results. In contrast, unsteady state techniques such as GRI or pulse decay have been used to measure the permeability of unconventional formations such as shales due to their ultra-low permeability. GRI technique is carried on crushed samples and is considered a fast technique for matrix permeability measurement. However, recent studies have found that reported GRI measurements results by different commercial laboratories …
Transformation Of A Pre-Algebra Developmental Mathematics Course That Led To The Redesign Of The Developmental Mathematics Program At A Rural Community College, Mary Beth Angeline
Transformation Of A Pre-Algebra Developmental Mathematics Course That Led To The Redesign Of The Developmental Mathematics Program At A Rural Community College, Mary Beth Angeline
Graduate Theses, Dissertations, and Problem Reports (ETD)
This dissertation documents the redesign of a developmental mathematics program at a rural community college and compares the course pass rates between the redesigned courses and the traditional lecture-based courses. A design and developmental methodology was used to chronicle changes to outcomes, learning environment, instructor role, and curricular practices over four course offerings that occurred over three semesters. Effectiveness of these changes was used to continually make corrections to the course structure, and make a case to expand the redesign of the course to the entire developmental mathematics program.
Growth And Properties Of Topological Insulator Thin Films Based On The Bi2se3 Compound, Sercan Babakiray
Growth And Properties Of Topological Insulator Thin Films Based On The Bi2se3 Compound, Sercan Babakiray
Graduate Theses, Dissertations, and Problem Reports (ETD)
This dissertation summarizes the growth, structural and electrical transport properties of topological insulators based on Bi2Se3 compound grown by molecular beam epitaxy. In the first three chapters, I review the theoretical background and experimental procedures necessary to understand the properties of topological insulators. The next three chapters cover the results of the structural characterization and electrical transport measurements. The final chapter summarizes the overall results and suggests future directions for research on Bi2Se3 compounds. Topological insulators (TIs) are a new class of quantum matter with a bulk band gap and gapless metallic surface states. The spin and momentum degrees of …
The Memory Wars: Debates On The Holocaust And The Legacy Of Anti-Semitism In Poland, Jonathan Andrew Bergquist
The Memory Wars: Debates On The Holocaust And The Legacy Of Anti-Semitism In Poland, Jonathan Andrew Bergquist
Graduate Theses, Dissertations, and Problem Reports (ETD)
The process of Vergangenheitsbewaltigung, or mastering the past, is often slow and painful. All too often nations have a tendency to celebrate their past triumphs while forgetting or marginalizing the most traumatic episodes of their histories. The case of Poland is particularly interesting---especially in connection to the disappearance of the country's minority Jewish heritage. Poland, of course, was the primary site of the Holocaust, and the nearly complete destruction of the country's once vast Jewish population, which had been the largest in the world, has left a troublesome legacy behind. How had such horrific crimes taken place on Polish soil? …
Evaluation Of The Antidepressant Potential Of Dextromethorphan, Linda Nguyen
Evaluation Of The Antidepressant Potential Of Dextromethorphan, Linda Nguyen
Graduate Theses, Dissertations, and Problem Reports (ETD)
Depression affects more than 350 million people and is the leading cause of disability worldwide. Major challenges in the management of depression remain the 4-12 weeks of delayed efficacy and 30% of patients who are resistant to the therapeutic effects of current pharmaceutical treatments. We herein examined whether dextromethorphan (DM) may be able to take on these challenges, because 1) it has overlapping pharmacology with ketamine, which has shown rapid (within 24 hours) antidepressant effects, even in treatment-resistant individuals; 2) unlike ketamine with its notable abuse liability and adverse effects, DM is an over-the-counter antitussive with a high safety margin; …
Probing Pulsar Emission On Short Timescales: Rotating Radio Transients, Cyclic Spectroscopy, And Single-Pulse Studies Of Millisecond Pulsars, Nipuni Tharaka Palliyaguru
Probing Pulsar Emission On Short Timescales: Rotating Radio Transients, Cyclic Spectroscopy, And Single-Pulse Studies Of Millisecond Pulsars, Nipuni Tharaka Palliyaguru
Graduate Theses, Dissertations, and Problem Reports (ETD)
Rotating radio transients (RRATs) are neutron stars are that characterized by the emission of strong sporadic bursts. We have analysed the long- and short-term time dependence of the pulse arrival times and the pulse detection rates for eight RRAT sources from the Parkes Multi-beam Pulsar Survey (PMPS). We find significant periodicities in the individual pulse arrival times from six RRATs. These periodicities range from ∼30 minutes to 2100 days and from one to 16 independent (i.e. non-harmonically related) periodicities are detected for each RRAT. In addition, we find that pulse emission is a random process on short (hour-long) time scales …
Solar Electric Propulsion Triple-Satellite-Aided Capture With Mars Flyby, Sean Patrick
Solar Electric Propulsion Triple-Satellite-Aided Capture With Mars Flyby, Sean Patrick
Graduate Theses, Dissertations, and Problem Reports (ETD)
Triple-Satellite-aided-capture sequences use gravity-assists at three of Jupiter's four massive Galilean moons to reduce the DeltaV required to enter into Jupiter orbit. A triple-satellite-aided capture at Callisto, Ganymede, and Io is proposed to capture a SEP spacecraft into Jupiter orbit from an interplanetary Earth-Jupiter trajectory that employs low-thrust maneuvers. The principal advantage of this method is that it combines the ISP efficiency of ion propulsion with nearly impulsive but propellant-free gravity assists.;For this thesis, two main chapters are devoted to the exploration of low-thrust triple-flyby capture trajectories. Specifically, the design and optimization of these trajectories are explored heavily. The first …
Sensor Placement Algorithms For Process Efficiency Maximization, Prokash Paul
Sensor Placement Algorithms For Process Efficiency Maximization, Prokash Paul
Graduate Theses, Dissertations, and Problem Reports (ETD)
Even though the senor placement problem has been studied for process plants, it has been done for minimizing the number of sensors, minimizing the cost of the sensor network, maximizing the reliability, or minimizing the estimation errors. In the existing literature, no work has been reported on the development of a sensor network design (SND) algorithm for maximizing efficiency of the process. The SND problem for maximizing efficiency requires consideration of the closed-loop system, which is unlike the open-loop systems that have been considered in previous works. In addition, work on the SND problem for a large fossil energy plant …