Digital Commons Network^™

Rare Earth Element Recovery From Acid Mine Drainage Using Ion Exchange And Selective Precipitation Processes, Paubla Andrea Gallego Lopez

Graduate Theses, Dissertations, and Problem Reports (ETD)

Rare earth elements (REEs) are used in high-tech applications due to their electromagnetic and optical properties. As global demand for REEs surges, the limitation of primary mineral deposits has increased interest in alternative sources. One such source is acid mine drainage (AMD), which, although typically low in REE concentration, offers a promising avenue for recovery. Among the emerging recovery methods, ion exchange has shown promise due to its effectiveness at low concentrations and lower operational cost than conventional techniques such as acid leaching and solvent extraction.

This research focused on developing a recovery process by combining ion exchange with selective …

Characterization Of A Descending Neuron That Modulates Flight Performance And Provides Input Onto A Flight-Related Predictive Motor Circuit, Andisheh Balouchi

Graduate Theses, Dissertations, and Problem Reports (ETD)

Descending neurons (DNs) play a critical role in sensorimotor integration by relaying motor information to the ventral nerve cord (VNC). Within the VNC, local interneurons, other DNs, and ascending neurons (ANs) make circuits with sensory and motor neurons to modify flies’ behavior. One important AN pair in Drosophila Melanogaster is mesothoracic ascending histaminergic neurons (MsAHNs), which are known to convey predictive wing motor signals to the brain. DNg32 is the primary upstream synaptic partner of MsAHNs, integrating DNg32 input with other inputs to generate predictive motor signals. The goals of this study were to 1) map the synaptic connectivity of …

Simulated Slot Machine Gambling In Relation To Sign-Tracking, Polina Krom

Graduate Theses, Dissertations, and Problem Reports (ETD)

The propensity to attribute incentive salience to reward-related cues, or sign-tracking (ST) has been linked to addiction in animal models and some initial human data. The current study explores the role of sign-tracking (ST), as a potential risk factor for problematic slot machine gambling, which abundantly features audiovisual reward-related cues, henceforth sensory features. A sample of healthy participants without gambling problems (n = 30) completed a Pavlovian-to-Instrumental Transfer (PIT) paradigm to assess ST propensity and played on a realistic slot machine simulator consisting of two versions: with sensory features (SF+) and without (SF-). Each game version had fixed bet sizes, …

Not Far Enough: The West Virginia Human Rights Commission And The Civil Rights Movement, David Solomon

Graduate Theses, Dissertations, and Problem Reports (ETD)

This thesis investigates the West Virginia Human Rights Commission and its action surrounding the Civil Rights Movement. The Commission represented the liberal ideals that led white moderates to be potent allies of the Civil Rights Movement. Throughout the years following its inception, the Commission investigated and documented many instances of Jim Crow that were crushing Black communities in West Virginia. However, the limits of its liberal approach prevented it from creating solutions that would address the power structures that supported discrimination in West Virginia. By the late 1960s, Black frustrations with the lack of meaningful change boiled over into riots …

The Effect Of Alternative Work Regimes On Recruiter Productivity, Keith Sean Cogdell

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation examines the impact of different work regimes, onsite, remote, and hybrid, on recruiter productivity within the staffing industry. As workforce models evolve, organizations encounter challenges in determining how these structural changes influence employee performance. Existing studies are often cross-sectional and rely heavily on self-reported data, limiting their capacity to capture long-term trends and contextual factors. To address this issue, the present research utilizes a longitudinal design with five years of recruiter-level performance data from a national staffing firm, which includes over 27,000 observations. Using Self-Determination Theory (SDT) as a framework, the study investigates how intrinsic motivation mediated by …

Using Data Science And Sustainability Assessment Tools To Evaluate Wastewater Treatment Technologies, Haidar Shakuir Aldaach

Graduate Theses, Dissertations, and Problem Reports (ETD)

Wastewater management in small communities has faced numerous challenges in recent years, including population growth, limited budgets for operation and maintenance, and stringent effluent standards required by environmental regulations. These challenges motivate enhancing wastewater treatment processes to protect water quality. Wastewater treatment performance can be improved in small towns and rural regions by implementing data-driven strategies. Data science, life cycle assessment (LCA), and life cycle cost analysis (LCCA) are three data-driven decision-making tools that require data collection, modeling, computational models, and statistical analysis that could be utilized to improve wastewater treatment efficiencies. In this study, these three tools were adopted …

Impacts Of Trout Stocking And Non-Native Trout Populations On Wild Brook Trout Salvelinus Fontinalis In West Virginia Streams, Xander A. Lamping

Graduate Theses, Dissertations, and Problem Reports (ETD)

Understanding the extent that anglers targeting stocked trout end up harvesting wild Brook Trout Salvelinus fontinalis addition to studying how non-native trout species affect native Brook Trout populations is important for effective management and conservation in the central Appalachian Mountains. This thesis addresses these concerns in two parts. The first chapter used a combination of creel surveys and non-lethal morphometric methods to estimate wild Brook Trout harvest rates on four stocked streams during the West Virginia spring stocking season. A generalized linear model was developed to determine the origin (wild vs. hatchery) of Brook Trout harvested by anglers. This differentiation …

Tobacco And Trouble: Exploring The Health Consequences Of Electronic Cigarette Use In Adolescents, Noor Ibrahim Abdulhay

Graduate Theses, Dissertations, and Problem Reports (ETD)

Background: Tobacco use remains one of the leading causes of preventable disease and death in the United States (U.S.). Although conventional cigarette use among youth has declined, the use of electronic cigarettes (e-cigarettes) has become highly prevalent and poses emerging public health concerns. Adolescence represents a critical developmental period for both oral and mental health, making it essential to understand the consequences of tobacco and nicotine exposure during this stage. The goal of this dissertation is to examine the health impacts of tobacco use in adolescents across multiple domains. Specifically, this research (1) synthesizes existing evidence on the relationship between …

Framework To Guide The Review And Update Of Wvdoh Schedule Review Practices And Specifications, Myles Joshua Avery

Graduate Theses, Dissertations, and Problem Reports (ETD)

Roadway and bridge construction projects are often complex, necessitating high quality schedules to ensure the work is completed on time and within budget. The West Virginia Division of Highways (WVDOH) utilizes scheduling procedures and policies outlined within the Prosecution and Progress section of its Standard Specifications for Roads and Bridges to ensure timely and cost-effective project deliveries. Recently, concern has risen that the existing language within this section is outdated and fails to cater to modern scheduling techniques, technologies, and industry practices. In turn, WVDOH personnel question whether schedules that follow the existing specifications align with the complexities, types, values, …

Soccer Sheikhs: Qatar, Football, And The Quest For Self-Confidence And Global Prominence, Ali Ahsan

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation examines Qatar’s strategic use of football as a mechanism for securing ontological security within the international system. Moving beyond standard International Relations explanations of state behavior, the study draws on ontological security theory which emphasizes the need of states to sustain a coherent sense of self through routines, narratives, and recognition. By framing football as such a practice, the dissertation advances the study of sport as a growing area of interest in the political sciences. Through a qualitative methodology employing Reflexive Thematic Analysis of expert interviews, the research analyzes Qatar’s football policies, including hosting the 2022 FIFA World …

The Dna Methylation Capacity Of The Tsetse Fly: Glossina Morsitans, And Its Integration With Symbiont Nutrient Provisioning, Dylan Forrest Richmond

Graduate Theses, Dissertations, and Problem Reports (ETD)

Tsetse flies (Diptera: Glossinidae) are the vector of trypanosomes (Trypanosoma spp.), which are responsible for African trypanosomiasis, also known as sleeping sickness. African trypanosomiasis is a significant health and economic burden yet remains a neglected tropical disease. As an obligate blood feeder, tsetse flies are reliant on B vitamin supplementation from intracellular Gammaproteobacteria, Wigglesworthia glossinidia. Folate (B9) is essential for tsetse development and reproduction, as well as DNA methylation in animals. As a reversible modification, DNA methylation typically occurs in a CpG dinucleotide context and can alter gene expression via the restriction of transcription. Across insects, the …

Modeling And Simulation Of A Process For Upcycling Of Low-Density Polyethylene Plastic Waste To Ethylene, Xiaoyan Wang

Graduate Theses, Dissertations, and Problem Reports (ETD)

Ethylene is one of the most widely produced petrochemicals, with an estimated global output of 180 million metric tons in 2022. Approximately 82 million metric tons of ethylene are used annually for plastic production, primarily for polyethylene (PE), as well as polypropylene (PP) and polyvinyl chloride (PVC). The CO₂ emissions associated with PE production were approximately 14 million metric tons in 2022. Globally, an estimated 70 million metric tons of PE are produced and consumed each year, with the majority (~79%) ending up in landfills or the environment.

This project proposes a novel process in which waste low-density polyethylene (LDPE) …

Deep Target Recognition: Semi-Supervised Annotation, Sensor Fusion And Super-Resolution, Shoaib Meraj Sami

Graduate Theses, Dissertations, and Problem Reports (ETD)

Despite the recent expansion of machine learning algorithms to cover a wide range of disciplines, several areas of automatic target recognition (ATR) remain underexplored. This dissertation presents tools developed to improve performance in three significant aspects of ATR: semi-supervised annotation, sensor fusion, and image super-resolution. The aim of the semi-supervised methods is to automatically annotate targets in scenarios where labeled data are scarce in the target domain but available in the source domain. Secondly, to address the limitations of individual image sensors and enhance robustness under different environmental conditions and man-made constraints, a sensor fusion algorithm was developed to improve …

Rethinking Compliance: How Goal Congruence Can Lead To Noncompliance And Positive B2b Performance, Paige Harrison Fender

Graduate Theses, Dissertations, and Problem Reports (ETD)

Traditional marketing theories (e.g., agency theory) suggest that aligning goals with a partner firm will enhance compliance and lead to better overall performance for both firms. The research on positive deviance, in contrast, suggests that a firm may deviate from contractual terms in order to accomplish shared goals and enhance performance. Merging these perspectives and pulling from more nuanced discussions of compliance, this dissertation explores the potential deleterious effects of goal congruence on compliance. Specifically, we examine the conditions in which goal congruence leads to both compliance and noncompliance and how these conditions impact performance. Additionally, this dissertation examines how …

Feasibility Testing Of A Web-Based Phq-9 Test For Student Depression, Israel Oluwagbenga Odugboye

Graduate Theses, Dissertations, and Problem Reports (ETD)

Feasibility Testing of a Web-Based PHQ-9 Test for Student Depression

Israel Odugboye

Student depression stands as a critical public health issue because it affects numerous young adults who experience academic decline, disability, absenteeism, productivity reduction, and suicidal thoughts. The general population shows a 10% to 15% lifetime risk of developing depression which leads to a twentyfold elevation in suicide risk for depressed individuals [3]. The Patient Health Questionnaire-9 (PHQ-9) serves as a popular tool for detecting depressive symptoms and determining severity levels among students from different cultural backgrounds. The assessment contains 27 possible scores which follow DSM depressive symptom criteria …

Power, Economy, And Food Systems In The Confederacy: A Material History Of The Confederate Subsistence Department, John Martin Mcmillan

Graduate Theses, Dissertations, and Problem Reports (ETD)

This dissertation questions how human and non-human actors share power. By exploring Confederate logistics within the Subsistence Department, the collaboration between bureaucrats and the material world is revealed. Contributing to scholarship aimed at expanding the field of Civil War studies, this dissertation not only provides a more complex and interesting view of the conflict, but also an understanding that human beings are not solely responsible for the war’s results. By applying a materialist approach, the causes and outcomes of an event as complicated as a civil war can be better explained and understood. The choice to stockpile food for distribution …

Evaluation Of Rare Earth Element Hydraulic Preconcentrate Material Strength Characteristics And Operation Manual Development For Triaxial Machine Testing, Nicholas C. Stalnaker

Graduate Theses, Dissertations, and Problem Reports (ETD)

As part of ongoing efforts to establish a domestic Rare Earth Elements (REE) supply chain, Hydraulic Preconcentrate (HPC) generated at the Horseshoe Bend (HsB) treatment plant was produced and evaluated as a potential feedstock source. Following adjustment of the site’s clarifiers to the required pH set points, HPC was collected and pumped into 24 geobags. These geobags were passively dewatered to raise the total solids content. The evaluation included three geobag types: woven geotextile, composite (woven and non-woven), and geobags enhanced with Capillary Channel Fiber (CCF) (Bird, 2024). Hydraulic Preconcentrate (HPC) material is collected through efforts to contain and properly …

Ciliary Arl14b In Vision, Alexis Breann Crockett

Graduate Theses, Dissertations, and Problem Reports (ETD)

Primary cilia are highly specialized organelles that regulate signaling, trafficking, and sensory perception across multiple tissues, including the retina. The small GTPase ADP Ribosylation Factor-Like Protein 13B (ARL13B) is an atypical ARF-family protein enriched in cilia. ARL13B acts as a guanine exchange factor (GEF) for another small GTPase ARF-like Protein 3 (ARL3). Mutations in ARL13B cause Joubert syndrome, a ciliopathy characterized by brain malformation, developmental delays, and retinal degeneration. Despite ARL13B’s known ciliary localization and clinical relevance, ARL13B’s precise functions in cilia remain poorly defined. This dissertation investigates the cilia-specific roles and GEF-specific roles of ARL13B in photoreceptors using two …

Evaluation Of Small Unmanned Tailsitter Hybrid Air Vehicles Via Full Flight Simulation, Andrew Spencer Winters

Graduate Theses, Dissertations, and Problem Reports (ETD)

Small Unmanned Aerial Vehicles have exploded in popularity in the past 15 years among researchers and for industrial uses such as agriculture, search and rescue, and infrastructure inspection. Fixed wing and multirotor designs present two major paths that can be taken with these technologies. Fixed wing platforms have superior aerodynamic efficiency but require large areas for takeoff/landing and cannot hold a constant position in space, limiting their use. Multirotor configurations offer a more versatile platform that can maneuver in 3 dimensions independently but lack the endurance of fixed wing vehicles. This thesis analyses a quadrotor biplane and a variable wingspan …

Bridging The Gap Between Structural And Cellular Biology: Insight Into The Organization Of Glycolytic Enzymes In Cells, Heather Hansen

Graduate Theses, Dissertations, and Problem Reports (ETD)

Glycolytic enzymes are spatially organized in the cytoplasm, and are shown to localize with cellular structures such as the plasma membrane, F-actin, mitochondria, or associate independently within the cytosol. The assembly of these enzymes is hypothesized to regulate pathway flux to meet the energetic needs of the cell. However, it is unclear whether all of these assemblies have the same mechanism of formation or function in the cell. We investigated the role of glycolytic enzyme assemblies in cells, using the glycolytic “gatekeeper” enzyme phosphofructokinase-1 (PFK1). PFK1 is extensively regulated by multiple mechanisms, including over 20 allosteric ligands, post translational modifications, …

The Effects Of Operatic Voice Type On Singer Identity, Adelaide J. Mcdonald

Graduate Theses, Dissertations, and Problem Reports (ETD)

Within Western art music, voices are typically classified using the Fach system, which is based upon vocal characteristics and separates singers into the categories of soprano, mezzo soprano, contralto, counter tenor, tenor, bass, and baritone. Over time, these categories have become embedded with social and cultural meaning within the operatic world, leading to the development of stereotypes and expectations surrounding singers, as well as social categories and identities, referred to in this study as “sociocultural vocal categories” and “sociocultural vocal identity,” respectively. Currently, there are limited explorations of the sociocultural vocal categories and their associated stereotypes, with research on singer …

Novel Design And Fabrication Of A High-Speed Transient Heat Flux Sensor For Application To Rotating Detonation Engines, Zachary Todd Tallman

Graduate Theses, Dissertations, and Problem Reports (ETD)

Rotating detonation engine (RDE) combustion systems have been a topic of interest in the pressure gain combustion community for their benefits over traditional gas turbine engine combustors. However, cooling requirements for these engines are significantly higher and less predictable than those of non-detonating engines. To understand and quantify the high-speed heat transfer dynamics within an RDE, a novel high-frequency heat flux sensor is presented. This study aims to design a robust, single-sided sensor that can withstand the high temperature and harsh environment of an RDE for extended durations. Screen printing is used to deposit a layered, platinum-yttria-stabilized zirconia (YSZ) film …

In-Plane Shear Stiffness Of Stay-In-Place Forms And Bracing Effects On The Torsional Stability Of Press-Brake-Formed Tub Girders, Ethan L. Host

Graduate Theses, Dissertations, and Problem Reports (ETD)

Press-brake-formed tub girders have welded internal angle bracing that is believed to be necessary for torsional stability under eccentric loading. However, this bracing creates fatigue weld hotspots overtime, which are subject to cracking. This study was performed to assess the torsional behavior of the Valmont U12 press-brake-formed tub girder (PBFTG) under various configurations using finite element analysis (FEA) modeling and experimental laboratory testing. The primary objective was to (1) determine the necessity of various angle bracing throughout the beam, and the effects removing said braces has on the torsional stiffness of the girder and (2) investigate the use of stay-in-place …

Raman Spectroscopy For Rapid Quantification Of Macronutrients In Heirloom Beans, K. Chandler Williams

Graduate Theses, Dissertations, and Problem Reports (ETD)

Quantification of macronutrients in food requires a large investment in facilities and instrumentation as well as ongoing expenses of labor, reagents, and hazardous waste disposal. These costs pose a significant barrier to determining macronutrient quantities in the thousands of uncharacterized landrace and heirloom crops and discourage traditional crop breeding projects from ensuring that their selected crops maintain desirable macronutrient profiles in addition to target agronomic traits. Our objective was to test whether a hand-held Raman spectrometer—a technology which has found use in plant disease diagnostics but remains largely overlooked in nutrient quantification-- could provide a feasible means for quantifying the …

Implementation Of A Neural Network Execution Framework For Generalized And Cross-Platform Deep Learning Deployment And Inference On Spacecraft Systems, Rafael Polanco Segovia

Graduate Theses, Dissertations, and Problem Reports (ETD)

Recent advances in hardware and software technology have made it possible to implement more resource-demanding deep learning algorithms in constrained hardware environments. This creates opportunities to use deep learning for aerospace applications on increasingly smaller aerospace vehicles. This work presents the implementation of a Neural Network Execution Framework (NNEF), which aims to provide a cross-platform and reusable framework to deploy and execute trained neural networks for deep learning aerospace applications. The NNEF executes any neural network inference process regardless of the original deep learning framework in which it was created, for supported flight software platforms, and space-like computer boards. Users …

Green Bank Chime/Frb Outriggers Commissioning And Analog System Development, Kholoud Sharif Tag Alkhatem Khairy

Graduate Theses, Dissertations, and Problem Reports (ETD)

The main objective of this thesis is to document the development and commissioning of the Canadian Hydrogen Intensity Mapping Experiment. (CHIME) outrigger at the Green Bank Observatory. (GBO) in Green Bank, WV. This novel cylindrical wide-field radio transient telescope is currently operating in conjunction with CHIME. The CHIME outrigger at GBO aims to contribute significantly to the field of radio astronomy, with implications for both Fast Radio Burst. (FRB) science and broader astronomical research. The construction and commissioning of the CHIME outrigger at the GBO mark a pivotal step forward in pursuing high-precision wide-field detection and localization of radio transients, …

Youth Sport Organizational Leaders’ Perceived Strengths And Challenges Working With Volunteer Coaches: A Case Study, Hannah Swartz

Graduate Theses, Dissertations, and Problem Reports (ETD)

Youth sport organizations in the United States rely heavily on volunteer coaches to deliver accessible and developmentally aligned programming, yet little research has examined how organizational leaders perceive and manage this volunteer workforce. Existing scholarship has focused primarily on volunteer coach motivations and experiences from the coach perspective, leaving a gap in understanding the views of those responsible for recruiting, training, retaining, and supporting volunteers. Guided by the youth sport social-ecological model (NYSS, 2019), the recent USOPC Commission Report, and principles of self-determination theory (Ryan. & Deci, 2000), this instrumental case study explored youth sport organizational leaders’ perceptions of working …

Tourette Syndrome Research Highlights From 2024 [Version 3; Peer Review: 2 Approved, 1 Approved With Reservations], Andreas Hartmann, Per Andrén, Cyril Atkinson-Clement, Virginie Czernecki, Cécile Delorme, Simon Morand-Beaulieu, Nanette Mol Debes, Kirsten Müller-Vahl, Peristera Paschou, Natalia Szejko, Apostolia Topaloudi, Kevin J Black

2020-Current year OA Pubs

We summarize research reports from 2024 relevant to Tourette syndrome, which the authors consider the most important or interesting. This working draft aims to submit this content for publication around the beginning of 2025 in the yearly Tourette Syndrome Research Highlights series on F1000Research. The authors welcome article suggestions and thoughtful feedback from readers, who can add a comment by clicking on the rectangular comment box icon to the left of the LOG IN link at the top of this page. For private comments, you can reach us by email ( [email protected] or [email protected]).

Whole Genome Sequence Analysis Of Low-Density Lipoprotein Cholesterol Across 246 K Individuals, Margaret Sunitha Selvaraj, Lisa De Las Fuentes, Susan K. Dutcher, Et Al.

2020-Current year OA Pubs

No abstract provided.

Improving Hpv Vaccine Rates For Aboriginal Young People Through A Social Media Campaign: An Interrupted Time Series, Natalie A. Strobel, Jocelyn Jones, Kim Gates, Simon L. Turner, Joanne E. Mckenzie, Daniel R. Mcaullay

Research outputs 2022 to 2026

Human papillomavirus (HPV) is a common sexually transmitted infection that can lead to HPV-related cancers such as cervical cancer and other cancers such as anal, vaginal, and penile cancer. HPV rarely produces symptoms and cannot be cured or treated; therefore, vaccination is essential to protect against HPV and HPV-related diseases. However, young Aboriginal and Torres Strait Islander (hereafter, respectfully, ‘Aboriginal’) people are not receiving their HPV vaccine dose, resulting in missed opportunities to be protected from HPV-related cancers. Health promotion is a critical way to empower people to take ownership over and control their health and is a core function …