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Buried Pipeline Performance Under Surface Loading Using Finite Eelement Analyses And Innovative Soil Box Testing Methodologies., Adam Gabreil Cantrell
Buried Pipeline Performance Under Surface Loading Using Finite Eelement Analyses And Innovative Soil Box Testing Methodologies., Adam Gabreil Cantrell
Electronic Theses and Dissertations
Buried pipelines are used extensively in the utility industry to deliver natural gas to customers. Reasonable estimates indicated that there are approximately 26,000,000 miles of pipeline, of various diameters throughout the United States (PHMSA, 2018). For protection, and to relieve urban congestion, these pipelines are nearly always buried under ground. After the pipes are installed, however, there is little opportunity for inspection, or for supplemental protection, when needed. Thus, to reduce the likelihood of rupturing a natural gas pipeline, design guidelines that ensure consistent, minimum protection of these utilities, have been developed and implemented. Pipeline design and installation regulations for …
Exploratory Learning In Two Modalities: Tabular Vs Graphical., Lianda Velic
Exploratory Learning In Two Modalities: Tabular Vs Graphical., Lianda Velic
Electronic Theses and Dissertations
In traditional educational settings, an instructor delivers a lecture prior to providing students a practice activity. Exploratory learning reverses this order to encourage active learning and engagement, typically improving learning outcomes. However, more research is needed in order to determine how to optimally design exploratory learning materials, and how differences in such design impact learning processes and outcomes. The current study investigated the impact of instructional order and activity modality type (tabular or graphical) on learning outcomes. Undergraduate students (N=252) were taught the statistical concept of consistency and the formula to compute standard deviation. In the instruct-first condition, …
Constitutive Chefs: The Ethos And Constitutive Rhetoric Of Anthony Bourdain, Sean Sherman, And Mashama Bailey., Michael Jared Benjamin
Constitutive Chefs: The Ethos And Constitutive Rhetoric Of Anthony Bourdain, Sean Sherman, And Mashama Bailey., Michael Jared Benjamin
Electronic Theses and Dissertations
This dissertation project explores the motivation of chefs to become Public Chef Intellectuals and how they cultivate and engage with an audience that will never taste their food. Using a case study approach, this dissertation analyzes the intellectual missions of Anthony Bourdain, Sean Sherman, and Mahsama Bailey as told through their television shows, memoirs, cookbooks, and restaurant menus. I argue that for each chef, their cultural identity is inextricably tied to their ultimate purpose – the use of food as a Trojan horse to promote their vision for a collective American culture. This project underscores that this process happens dialogically …
Proteolytic Manipulation Of Neutrophil Responses And The Efferocytic Synapse By Porphyromonas Gingivalis., Kelley N. Cooper
Proteolytic Manipulation Of Neutrophil Responses And The Efferocytic Synapse By Porphyromonas Gingivalis., Kelley N. Cooper
Electronic Theses and Dissertations
Porphyromonas gingivalis (Pg) is etiologically associated with chronic periodontitis, a highly prevalent chronic inflammatory disease characterized by the destruction of hard and soft tissues of the periodontium. Pg is adapted to live in the human oral subgingival niche, a hostile environment dominated by excessive numbers of activated neutrophils and antimicrobial mediators. Its survival is contingent upon prompt and effective inactivation of neutrophil effector functions. In this dissertation, I uncover a novel pathogenic mechanism employed by Pg that disarms the antimicrobial capacity of live neutrophils and simultaneously sequesters them within macrophages. Mechanistically, RgpB, a cysteine protease produced by Pg …
Greek Key-Inspired Fractal Metamaterials With Enhanced Flexibility And Energy Absorption., Zhennan Zhang
Greek Key-Inspired Fractal Metamaterials With Enhanced Flexibility And Energy Absorption., Zhennan Zhang
Electronic Theses and Dissertations
Architected materials with intricate three-dimensional (3D) geometries offer unique properties and functionalities but face challenges in manufacturing costs and complexity. This research explores the integration of simple 2D Greek Key-inspired lattices into fractal designs to achieve exceptional mechanical performance. Using 3D printing and kerfing, these fractal structures demonstrate enhanced flexibility and energy absorption capabilities. Through three-point bending and in-plane tensile tests, the 2D fractal lattices exhibited a 600-fold reduction in bending force and a tensile stretch capacity of up to 520%, significantly outperforming brittle parent materials. Out-of-plane compression tests revealed a five-fold increase in energy absorption compared to honeycomb structures, …
Defining The Peripheral Plasticity Of Nociceptive Afferents Following Spinal Cord Injury And Physical Therapy Intervention., Morgan Julianna Forston
Defining The Peripheral Plasticity Of Nociceptive Afferents Following Spinal Cord Injury And Physical Therapy Intervention., Morgan Julianna Forston
Electronic Theses and Dissertations
The focus of this dissertation is to explore the peripheral plasticity of nociceptive afferents following spinal cord injury (SCI) and whether it is exacerbated or induced when physical therapy-based muscle stretching, a therapy we have shown to be detrimental to locomotor recovery in rodents, is implemented post-SCI. Chapter I provides a brief introduction on sensory afferents with particular emphasis on nociceptive afferents and their multifaceted role within the peripheral and central nervous systems. Chapter II describes SCI epidemiology and common sensory related complications that occur in patients as well and pharmaco- and physical therapies that are employed post-SCI. Chapter III …
Liquid Chromatography-Mass Spectrometry Based Metabolomics, Lipidomics And Epitranscriptomics., Raobo Xu
Liquid Chromatography-Mass Spectrometry Based Metabolomics, Lipidomics And Epitranscriptomics., Raobo Xu
Electronic Theses and Dissertations
Metabolomics and lipidomics are the comprehensive studies of metabolites and lipids in cells, biological fluids, tissues, or organisms. These distinct chemical fingerprints are left behind by cellular processes. Epitranscriptomics is the field that focuses on examining chemical modifications on RNA molecules at the transcriptome level. Liquid chromatography-mass spectrometry (LC-MS) has been widely used in those omics studies. In this dissertation, I developed and applied both untargeted and targeted approaches using LC-MS based various analytical platforms to conduct omics studies. Firstly, I investigated caffeine metabolites in human urine and discovered three potential functional biomarkers to differentiate the stages of alcohol-associated liver …
A Quantitative Evaluation Of An Innovative Family Treatment Court Program For Families With Co-Occurring Child Maltreatment And Substance Use., Ashley Rose Logsdon
A Quantitative Evaluation Of An Innovative Family Treatment Court Program For Families With Co-Occurring Child Maltreatment And Substance Use., Ashley Rose Logsdon
Electronic Theses and Dissertations
Substance use is linked to out-of-home care in over 40% of child welfare cases. This dissertation evaluated the experience of families with co-occurring child maltreatment and substance use in Family Recovery Court (FRC), an innovative family treatment court involving the judicial system, child welfare system, and behavioral health. Study One used a quasi-experimental propensity score match design, using administrative data and the North Carolina Family Assessment Scale for 68 families. The FRC group experienced better safety (substantiated repeat maltreatment), permanency (reunification), and well-being outcomes. The percentage of the FRC group who achieved reunification (81.2%) was significantly higher than that of …
Analysis Of The Robustness And Sensitivity Of Deep Learning Models For Automatic Target Recognition., Wael Bouchaala
Analysis Of The Robustness And Sensitivity Of Deep Learning Models For Automatic Target Recognition., Wael Bouchaala
Electronic Theses and Dissertations
Automatic Target Recognition (ATR) is an essential technology in various domains such as security, autonomous vehicles, and military applications. ATR systems are designed to detect, recognize, and classify objects of interest using sensor data, typically infrared imagery, to ensure reliable real-time operations under varying environmental conditions. However, the robustness and accuracy of ATR systems are often challenged by factors such as target occlusion, varying distances, and environmental perturbations. This thesis investigates the application of state-of-the-art deep learning techniques to enhance the performance and robustness of ATR systems. Specifically, we explore the use of Vision Transformers (ViT), Swin Transformer, and a …
A Little Bit Of Everything: Persistence Though The Pre-Medical Pipeline For First And Continuing Generation Students., Tana R. Didelot
A Little Bit Of Everything: Persistence Though The Pre-Medical Pipeline For First And Continuing Generation Students., Tana R. Didelot
Electronic Theses and Dissertations
This qualitative research study examines pre-medical college student persistence in their pathway to medical education. Through the framework of Terenzini and Reason’s College Student Persistence Model (2005), this work sought to understand the pre-college experiences, campus support factors, and external environments that help pre-medical college students to continue toward their goal of medical school entry. This study included pre-medical undergraduate students in the campus context of one public institution in the Southern Unites States. Pre-medical upperclassmen students were interviewed using a semi-structured protocol developed with the persistence framework. The analysis was conducted to obtain a more nuanced understanding of the …
Understanding How Social Media Influences Student Engagement Within The Classroom: Middle Grades Students' Perspectives., Anthony Dawyne Myrks-Brewer
Understanding How Social Media Influences Student Engagement Within The Classroom: Middle Grades Students' Perspectives., Anthony Dawyne Myrks-Brewer
Electronic Theses and Dissertations
This dissertation investigated the concept of student engagement and participation through the lens of middle school students. Studies and research show that overall student engagement amongst middle school-aged students is the most unengaged period throughout students' K-12 educational journey. Today's students live in a completely different generation from their guardians and parents due to the technology component, including smartphones making the element of social media more accessible. Social media is a platform that helps people communicate through various applications, and middle school students engage and participate in various social media applications daily. Student engagement is a critical component within education …
Patient, Provider, And Health System Characteristics Leading To The Delivery Of Low Value Health Care Services And Outcomes Of An Intervention For Mitigating Low Value Care., Philip Ray Rohrer
Electronic Theses and Dissertations
The United States spends more on health care than any other country, and Medicare accounted for nearly one-quarter of total personal health care spending in 2019. Waste within the health care system in the United States is estimated to represent approximately 25% of total U.S. health care expenditures. Low value care includes health care services that provide little or no benefit to patients, have potential to cause harm, incur unnecessary costs to patients, or waste limited healthcare resources. Low value care is estimated to represent roughly 10% of total health care waste, or between $75.7 billion and $101.2 billion dollars …
Spectrum Optimization For Advanced Air Mobility Communications Using Deep Reinforcement Learning., Rafael D. Apaza
Spectrum Optimization For Advanced Air Mobility Communications Using Deep Reinforcement Learning., Rafael D. Apaza
Electronic Theses and Dissertations
As aviation operations expand and new participants enter the National Airspace System (NAS), the demand for aeronautical communications will experience a significant rise. This surge is propelled by increased air travel and the emergence of Urban Air Mobility (UAM) operations, a subset of Advanced Air Mobility (AAM). UAM aims to facilitate intra-city transportation of people and cargo utilizing remotely piloted aircraft capable of electric vertical takeoff and landing operations. The growing dependence on efficient wireless communication systems underscores the critical importance of intelligent spectrum allocation and effective airspace management to ensure safe, seamless, and technologically advanced air operations. However, the …
How White Supremacy Travels Through Time: Anti-Literacy Laws, Dei Bans, And The Issue Of Black Self-Determination In Public Health., Nicole V. Ford
How White Supremacy Travels Through Time: Anti-Literacy Laws, Dei Bans, And The Issue Of Black Self-Determination In Public Health., Nicole V. Ford
Electronic Theses and Dissertations
This dissertation used a qualitative policy content analysis (PCA) of historical anti-literacy laws and modern DEI bans to answer two research questions: What is the connection between anti-literacy laws and DEI bans? How do anti-literacy laws and DEI bans create an environment that maintains white supremacy? A PCA exercise informed the analysis of historical anti-literacy laws in South Carolina (1834), Georgia (1829), North Carolina (1830), Louisiana (1830), Virginia (1831), and Alabama (1833) and modern DEI bans in Texas (2023), Alabama (2024), and Florida (2023) to find the connection between the laws. Findings from this dissertation illustrate how white supremacy operates …
Ai-Driven Approach For Diagnosis Of Renal Transplant Rejection Based On Biomarkers Identification And Integration., Israa Sharaby
Ai-Driven Approach For Diagnosis Of Renal Transplant Rejection Based On Biomarkers Identification And Integration., Israa Sharaby
Electronic Theses and Dissertations
They kidney is a vital organ for which humans are fortunate to find a spare through transplantation to sustain critical body functions, offering a hope to those struggling with renal failure. Kidney transplant procedure is the optimal treatment for people who suffer from end-stage renal failure. However, there are posed challenges due to the risk of immune rejection and the limited availability of donors. Early detection of renal rejection can provide timely intervention and accurate diagnosis that are critical to improve the transplant outcomes. This study explores the innovative approaches for addressing the current challenges through biomarkers identification, imaging techniques, …
Synthesis And Doping Effects In Highly Conductive Chalcogenide Solid Electrolytes., Selim Halacoglu
Synthesis And Doping Effects In Highly Conductive Chalcogenide Solid Electrolytes., Selim Halacoglu
Electronic Theses and Dissertations
Lithium and sodium ion batteries have been a vital component in the growth of small, portable electronic devices and EVs over the past 30 years. For future energy needs, changes to battery chemistry and composition will be necessary for two primary reasons: safer and higher energy batteries. Metal anodes have not seen widespread commercialization because of their propensity to react aggressively with the flammable liquid electrolytes commonly used in modern batteries. Non-flammable solid-state batteries (SSB) with solid electrolytes can safely be used with metal anodes, potentially providing a solution to both problems. The future perspective of safer battery is that …
Feasting In Small-Scale Societies: A Fort Ancient Example., Allison Sherman
Feasting In Small-Scale Societies: A Fort Ancient Example., Allison Sherman
Electronic Theses and Dissertations
Archaeological and ethnographic feasting studies have been dominated by competitive feasts, especially those in complex societies. By studying feasting in small-scale egalitarian societies, archaeologists can better understand the range of social aspects of feasting. Turpin, an early Fort Ancient site near the confluence of the Little Miami and Ohio Rivers, provides a case study for feasting in a small-scale agricultural society. Feature 100, a large pit feature, was initially interpreted as the remains of a feasting event. Using zooarchaeological, ceramic, and paleoethnobotanical data, the assemblage of Feature 100 was compared to that of an everyday domestic deposit. Based on these …
Development Of A Square Wave Voltage Field-Oriented Controller For A Linear Vapor Compressor., Thomas Everson
Development Of A Square Wave Voltage Field-Oriented Controller For A Linear Vapor Compressor., Thomas Everson
Electronic Theses and Dissertations
In this thesis, a novel control strategy for an inverter-driven linear compressor system is proposed in which the overall electrical losses of a coupled inverter-linear motor system are reduced through the use of a modified square wave inverter modulation scheme to minimize inverter switching losses at the expense of a modest increase in conduction losses. The controller is based on a single-phase field-oriented control strategy, and to achieve the FOC control objectives, the fundamental and dc components of the applied square wave voltage are matched to the corresponding values requested by the current controller. To validate the efficiency improvements offered …
Nickel Electrocatalysts On Carbon Supports For The Hydrogen Evolution Reaction., Mohan Paudel
Nickel Electrocatalysts On Carbon Supports For The Hydrogen Evolution Reaction., Mohan Paudel
Electronic Theses and Dissertations
Hydrogen is an important energy storage alternative to fossil fuels due to its high energy density. Currently, most hydrogen is produced through petroleum feedstocks, which produce large amounts of carbon dioxide. However, a more eco-friendly method is the electrocatalytic splitting of water into hydrogen and oxygen. Efficient catalysts for the hydrogen evolution reaction (HER) are typically platinum group metals, which are rare and expensive. There is growing interest in developing HER electrocatalysts with earth-abundant metals for water electrolysis. Nickel, which lies in the same group in the periodic table as Pt and has similar chemical properties, is explored extensively for …
Understanding Carceral Pathways And Outcomes Of Marginalized Adults Who Use Drugs., Carmen Renee Mitchell
Understanding Carceral Pathways And Outcomes Of Marginalized Adults Who Use Drugs., Carmen Renee Mitchell
Electronic Theses and Dissertations
This dissertation is an examination of outcomes among substance users at various stages of the incarceration process divided among five chapters. Chapter One provides an overview of substance use disorder (SUD), incarceration, and wider justice system-involvement, and explores how the political economy of health theoretical framework can be applied to examine how the criminal justice system creates and perpetuates inequality among marginalized people who use substances. Chapter Two examines post-release health outcomes among the population of incarcerated people who use substances using a scoping review and finds that people in reentry with SUD have poorer overall outcomes that without transitional …
Co-Emulation Of Robotics And Software-Defined Radio Based 5g Wireless Communications., Bhaskara Venkata Raju Garuda
Co-Emulation Of Robotics And Software-Defined Radio Based 5g Wireless Communications., Bhaskara Venkata Raju Garuda
Electronic Theses and Dissertations
The convergence of robotics and 5G wireless communication technologies has opened new avenues for real-time, dynamic robotic applications. This dissertation introduces a novel framework that integrates the Robot Operating System (ROS), Software-Defined Radios (SDRs), and 5G wireless networks to achieve seamless coemulation of robotic systems. The research emphasizes the unique features of 5G, such as ultra-low latency and high throughput, which enable critical applications like remote surgery, industrial automation, and autonomous vehicles. The methodology combines ROS for robotic control, SDRs for programmable communication channels, and 5G testbeds for high-speed, reliable data transmission. The experimental evaluation focuses on both position-based and …
Modeling And Understanding Of Additive Manufacturing Periodic Cellular Structures With Heterogeneity: Property, Quality And Design Strategy., Naresh Koju
Electronic Theses and Dissertations
Lightweight cellular structures with their higher per mass performance capability, multifunctional designability and property tolerability are gaining much wider adaptation in many engineering applications ranging from aerospace, defense, biomedical, automotive to sports. However, to achieve the desired performance levels careful design must be carried out. The experimental-based empirical design often involves high manufacturing cost, and there are also certain information/knowledges about the cellular deigns that could not be easily obtained experimentally, such as the deformation local fracture initiation. Similarly, numerical modeling-based design approach commonly suffers from high computation cost and the lack of inverse designability. In addition, numerical models often …
High Energy Density Lithium-Ion Battery Materials., Rachel Dewees
High Energy Density Lithium-Ion Battery Materials., Rachel Dewees
Electronic Theses and Dissertations
Growth of the EV industry has created an increased demand for Li-ion battery electrode materials, and support of a robust lithium-ion battery supply chain is a national imperative. For mainstream acceptance in the American market, the range of EVs must be improved, i.e., the energy density of the battery must be increased. Increasing the specific capacity of the electrode materials is the most direct strategy for increasing the energy density of the battery. Silicon anode materials have a theoretical capacity of over 3700 mAh·g-1 - an order of magnitude beyond that of the graphitic materials which are currently implemented. …
Differential Responses Of Human Neutrophils To Legionella Species., Hannah E. Hanford
Differential Responses Of Human Neutrophils To Legionella Species., Hannah E. Hanford
Electronic Theses and Dissertations
Legionella species are Gram-negative facultative intracellular bacterial pathogens commonly found in freshwater or soil environments where they survive and replicate within their natural protozoan hosts. Humans serve as an accidental host for Legionella species after inhalation of contaminated aerosolized water droplets or soil particles enabling the bacteria to enter the lungs, infect alveolar macrophages, and result in severe pneumonia. Evasion of degradation and proliferation within alveolar macrophages by Legionella species and manifestation of “Legionnaires’ disease” is dependent on the Dot/Icm type IV secretion system (T4SS). The T4SS apparatus is a needle-like channel for translocation of over ~350 effector proteins, depending …
Plasma Resuscitation Attenuates Hemorrhage-Induced Glomerular Barrier Damage And Dysfunction., William Byron Risinger
Plasma Resuscitation Attenuates Hemorrhage-Induced Glomerular Barrier Damage And Dysfunction., William Byron Risinger
Electronic Theses and Dissertations
Introduction: Acute renal dysfunction following traumatic injury and hemorrhagic shock carries significant morbidity and mortality. Despite an extensive understanding of renal tubule damage after injury, less is known regarding early alterations to the glomerular filtration barrier following hemorrhagic shock and resuscitation. Previously, our lab and others have demonstrated improved hepatic and intestinal microcirculatory parameters when resuscitation strategies incorporate fresh frozen plasma. In addition to improving end-organ perfusion, plasma reconstitutes the endothelial glycocalyx, an essential regulator of vascular permeability and microcirculatory function. However, the impact of plasma resuscitation on the glomerular glycocalyx and barrier following hemorrhage remains unknown. We hypothesized …
Factors Impacting Ehr Implementation: A Case Study In Belize, Jessica Y. Resendiz
Factors Impacting Ehr Implementation: A Case Study In Belize, Jessica Y. Resendiz
Electronic Theses and Dissertations
Electronic health record systems are a tool used throughout healthcare organizations to provide safe and efficient patient care. They are used to record and retrieve patient information related to health history, diagnostics, and treatment plans. Electronic health records have become increasingly integrated into healthcare practice and are demonstrative of safe and quality care. Healthcare organizations that do not have electronic health record systems in place jeopardize safe and efficient patient care. In addition, access and financial means to implement electronic health record systems in developing countries are challenging as resources are often restricted. This project aims to identify factors that …
General Sport Skills Performance Following The Combined Use Of Accentuated Eccentric Loading And Cluster Sets During A Strength-Endurance Training Phase, David Nelson
Electronic Theses and Dissertations
The purpose of this study aimed to evaluate the efficacy of resistance training with accentuated eccentric loading (AEL) and cluster sets (CS) versus traditional resistance training (TRAD) on general sports skills and power performance in recreationally trained individuals. Seventeen subjects (11 males, 6 females; mean age 23.2 ± 4.1 years; body mass 81.3 ± 22.2 kg; height 172.1 ± 10.0 cm; relative 1 RM back squat 1.5 ± 0.3) were randomly assigned to AEL (n = 9) or TRAD (n = 8) groups. After an initial familiarization and baseline testing, both groups underwent a four-week strength-endurance training regimen. The AEL …
Elevation And Population Size Effects On The Survival Of Drosera Rotundifolia, Jessica Williams
Elevation And Population Size Effects On The Survival Of Drosera Rotundifolia, Jessica Williams
Electronic Theses and Dissertations
Carnivorous plants face significant conservation challenges due to habitat destruction, climate change, and illegal harvesting. This study explores how elevation and population size influence key-life history traits of D. rotundifolia, such as flowering phenology, prey capture efficiency, seed production, and germination rates. Higher elevations and larger populations are associated with extended flowering durations and increased prey capture. However, seed production and germination rates show complex patterns that are likely influenced by genetic diversity, resource availability, or environmental conditions. These insights inform targeted conservation strategies, emphasizing habitat preservation, enhancing prey availability, and maintaining genetic diversity. Public education and community engagement …
Does Self-Care Moderate The Association Between Adverse Childhood Experiences, Trauma Symptoms, And Parental Reflective Functioning?, Vinaya Thomas
Does Self-Care Moderate The Association Between Adverse Childhood Experiences, Trauma Symptoms, And Parental Reflective Functioning?, Vinaya Thomas
Electronic Theses and Dissertations
Unresolved adverse and traumatic experiences in parents can amplify the risk of perpetuating intergenerational transmission of trauma. Parents’ positive and adaptive practices such as self-care might act as a protective factor against this ripple effect. This study investigated whether self-care moderated the relationship between parental ACEs, post-traumatic stress symptoms, and parental reflective functioning in mothers who are experiencing high psychosocial stress (n = 59) residing in rural Appalachia. Within our sample, there was no statistically significant linear relationship between our predictors, ACE score and PTSD symptoms, and our outcome of interest, maternal pre-mentalizing. We did not find empirical support for …
Perceived Stigma's Influence On The Association Between Suicide Risk Severity And Help-Seeking For Suicidal Crises, Donna Zastrow
Perceived Stigma's Influence On The Association Between Suicide Risk Severity And Help-Seeking For Suicidal Crises, Donna Zastrow
Electronic Theses and Dissertations
Introduction: Unfortunately, research examining help-seeking for suicide is limited. This study examined age, race, gender, suicide risk severity, and perceived stigma as predictors of formal and informal help-seeking behaviors individuals engage in during suicidal crises, and explored perceived stigma as a moderator of the relationship between risk severity and help-seeking. Method: Data from 80 college students who had experienced a past suicidal crisis were analyzed using two moderation analyses. Results: Rates of formal (67.5%) and informal (86.2%) help-seeking were high in the study sample. Higher suicide risk severity was positively associated with formal help-seeking (b = …