Digital Commons Network^™

Institutional Pressures On School Leadership And Innovation After Pandemic-Related School Closures: A Phenomenological Study, Gary Eugene Skeen

Educational Leadership & Workforce Development Theses & Dissertations

The COVID-19 pandemic was a phenomenon that caused immediate change to global institutions, including education. As schools created new systems during the pandemic, as restrictions began to be eased, many divisions felt pressure to continue virtual options after schools fully reopened to students. This pressure influenced the decisions made by school leaders, with internal and external pressures dictating how leaders navigated the decisions made regarding virtual learning after pandemic-related school closures. In the presence of the widespread phenomenon of the pandemic, school leaders faced pressures to reimagine learning through innovation or revert to institutional structures normalized prior to pandemic closures. …

The Role Of Policy Entrepreneurs In Understanding Oral Health Care Policy: A Case Study Approach Analyzing Multiple Streams Framework In Nc Oral Health Policy, Lori Gordon Hendrick

School of Public Service Theses & Dissertations

The United States Surgeon General has defined oral diseases as a “silent epidemic” that affects the most vulnerable citizens. More often, this includes those from low socio-economic backgrounds, children, elderly, and many members of ethnic minority groups. Although preventative and treatment modalities have improved over the past fifty years, some Americans continue to have little to no access to educational and preventative programs. The lack of access to dental care for all ages and oral health care literacy remains one of the largest health concerns for American citizens making it a “wicked problem”. Historically, raising Medicaid enrollment has failed to …

Roles Of The His-Purkinje System In Long Qt Syndrome Mediated Arrhythmias, Anthony Owusu-Mensah

Biomedical Engineering Theses & Dissertations

Long QT syndrome (LQTS) is a genetic or drug-induced electrophysiological disorder in the heart that prolongs the QT interval on the electrocardiogram. LQTS is present in considerable proportions (1:3000 to 1:5000) of the general population. LQTS has a high incidence of malignant ventricular arrhythmias during physical and emotional stress and is a significant cause of sudden death in younger subjects. This poses a substantial medical burden on the healthcare system in terms of morbidity, mortality, and finances. Despite extensive genetic research into LQTS, the mechanisms underlying spontaneous initiation and maintenance of arrhythmias are not fully understood. Beta-blockers are the standard …

Pedestrian-Motorist Self-Reported Behavioral Intentions Toward Using Alternative And Standard Safety Infrastructure, Emma Sunshine Hood

Psychology Theses & Dissertations

The increasing trend in pedestrian-motorist incidents on American roadways warrants a novel solution for improving roadway safety. Alternative crosswalk designs have piqued communities both in the United States and abroad. Designs range from slight changes in colors to extravagant illusions of the roadway falling beneath users. These crosswalk designs are not novel, literature on their efficacy as safety infrastructure is modest with mixed results. The purpose of the study was to expand the current literature on alternative crosswalk designs. The author hypothesized that the differences in behavioral intentions at alternative and standard safety infrastructure would be greater for younger male …

Cultivating Self-Knowledge In The Writing Classroom: A Study Of Contemplative Pedagogy, Jared Featherstone

English Theses & Dissertations

This pedagogical research study examines the effects of Understanding the Self Through Writing and Rhetoric, an undergraduate course designed by the researcher, on students. The course is an example of contemplative writing pedagogy, one that seeks to foreground first-person direct experience of the subject matter and integrates mindfulness meditation and journaling throughout. While writing and rhetoric are common undergraduate subjects to teach, the course focuses on particular, lesser-known aspects of them, internal rhetoric and self-making narrative. A third important part of the course is the examination of how communication technologies, especially social media and messaging applications, affect one’s internal rhetoric …

Refinement Of Alphafold-Predicted Models Using Cryo-Em Density Maps And Enhancement Of Protein Secondary Structure Topologies With Residue Contacts, Maytha Naif Alshammari

Computer Science Theses & Dissertations

Proteins play an important role in almost every biological process. Understanding the mechanism of protein function requires knowledge of three-dimensional (3D) structures. Traditionally, the determination of 3D structures has presented significant challenges. However, Cryo-Electron Microscopy (Cryo-EM) has revolutionized the field of structural biology, providing a powerful technique for atomic structure determination. This dissertation delves into the potential of cryoEM in two ways. First, this dissertation presents a new flexible fitting approach, utilizing Normal Mode Analysis (NMA) and Elastic Network Models (ENMs) to refine AlphaFold-predicted models by optimizing the structures to match cryo-EM density maps. This approach identifies the optimal mode …

Feasibility Study Of Oyster Shell Filtration Media For Stormwater Pollutants Removal, Sadiq Omer

Civil & Environmental Engineering Theses & Dissertations

The depletion of resources has raised interest in reusing or incorporating by-products into alternative materials. In the effort for net zero emissions, waste reduction, and a circular economy, it is crucial to reinvent the alternative utilization strategy for by-products as construction materials sustainably. This research examines the alternative utilization strategy for oyster shell by-products in regular stormwater pollutant removal best management practices (BMPs).

Numerous research has examined the utilization of oyster shell waste as a construction material in Asia and Europe, specifically focusing on the physical properties of crushed oyster shells as alternatives for aggregates. No studies have been identified …

Differential Effects Of Physical Activity On Social Interactions Of Adolescents With Autism Spectrum Disorder, Christianna Blanchard-Alworth

Human Movement Studies & Special Education Theses & Dissertations

Adolescents with autism spectrum disorder (ASD) often experience challenges with communication, social interaction, and motor skills, which can contribute to social isolation. A growing body of research suggests physical activity (PA) may improve social, physical fitness, and gross motor outcomes for adolescents with ASD. Although exercise and PA have been identified as an evidence-based practice (EBP) for this population, limited research has specifically examined the relationship between PA and social interactions. This study used an alternating treatment design, replicated across four adolescents with ASD, to compare the effects of two interventions – soccer instruction and fitness instruction - on social …

Coach To Teach: Effects Of Ecoaching On Special Education Teacher Implementation Of Discrete Trial Training, Olga Karadimou

Human Movement Studies & Special Education Theses & Dissertations

The growing shortage of special education teachers (SETs) and declining retention rates across numerous United States (U.S.) school districts pose a serious threat to the quality of education provided to students with disabilities. One of the ongoing challenges is the significant gap between evidence-based practices (EBPs) and their actual implementation in classrooms. Researchers emphasize the importance of providing high-quality professional development (PD) targeting the use of EBPs in the classroom, as doing so has been linked to SET retention (Berry & Gravelle, 2013; Berry et al., 2011; Hagaman & Casey, 2018; Reagan et al., 2019). This study aimed to experimentally …

The Anaerobic Rose Chamber (Arc): Novel Applications For Probing Clostridioides Difficile Dynamics, Tatiana Zvonareva

Chemistry & Biochemistry Theses & Dissertations

Clostridioides difficile infection (CDI) is an urgent public health threat with a high rate of recurrence and limited treatment options. Caused by the anaerobic intestinal pathogen C. difficile, this disease affects up to 500,000 Americans annually. Despite progress in our understanding of CDI pathophysiology, the lack of effective and accessible experimental platforms compatible with obligate anaerobe physiology hinders the advancement of treatment therapy. The application of in vivo models has been indispensable in understanding CDI pathophysiology, probing the complexity of the host response to the microbe, and establishing treatment protocols, and it continues to be essential in preclinical testing. …

Navigating Identity And Belonging: Itinerant Teachers Of The Deaf/Hard Of Hearing And The Blind/Visually Impaired As Structural Hole Spanners In Educational Ecosystems, Rj Horstmyer

Educational Leadership & Workforce Development Theses & Dissertations

Itinerant Teachers of the Deaf/Hard of Hearing and Itinerant Teachers of the Blind/Visually Impaired are highly specialized teachers and service providers who provide services to students who make up less than two percent of all students eligible for special education services and subsequently experience high levels of mobility between many schools. This study unearths the lived experiences of IToDs and ITVIs and examines how their itinerancy and ecological factors shape their identity and organizational belonging within and between multiple social networks. Participants were those currently employed as either Itinerant Teacher of the Deaf/Hard of Hearing or Itinerant Teachers of the …

Optical Investigation Of A Low-Pressure Plasma In A Superconducting Radio-Frequency Cavity, Zachary A. Caudell

Electrical & Computer Engineering Theses & Dissertations

The state-of-the-art cryomodules for particle accelerators use superconducting radio-frequency (SRF) cavities. It is known that accumulation of hydrocarbon impurities reduces the cavity surface work function, decreasing cryomodule performance metrics such as field emission, thermal stability, and accelerating gradients. An in-situ method of plasma processing has recently been developed to clean the cavities and restore cryomodule performance [1]. This study is to understand the properties of the low-pressure plasmas generated in a C100 SRF cavity and ultimately to improve the performance of plasma surface cleaning using optical emission spectroscopy. Using a 500 mm focal length Czerny-Turner monochromator coupled with a photomultiplier …

Symbolic Regression For Data-Driven Equation Discovery: A Physics-Informed Approach, Anusha Reddy Singireddy

Computer Science Theses & Dissertations

Symbolic Regression (SR) is a cutting-edge machine learning technique that discovers mathematical expressions representing the underlying patterns in data. Unlike traditional regression, SR explores a wide range of mathematical models, allowing for flexible and interpretable solutions. We utilize PySR, a highly customizable symbolic regression package, which combines genetic programming and modern optimization methods to efficiently search for interpretable equations. PySR balances model complexity with performance by penalizing overly complex expressions while optimizing accuracy. In this thesis, we apply Physics-informed Symbolic Regression through PySR to model the x and t dependence of the flavor isovector combination H_u − d( …

Intercellular Mitochondrial Transfer Contributes To Microenvironmental Fate Redirection Of Mammary Cancer Cells, Julie Sofie Bjerring

Biomedical Sciences Theses & Dissertations

The dynamic cellular microenvironment, made up of resident cells and various macromolecules, differs markedly across tissues in the body. The multidirectional signals that cells receive from this microenvironment, along with the signaling they send back, heavily influence their physiology and behavior. Recent important findings have further validated this notion as the mammary microenvironment has been shown to suppress tumor progression by redirecting cancer cells to adopt a normal mammary epithelial progenitor fate in vivo. However, the mechanism(s) driving changes in metabolic reprogramming and cancer fate redirection is understudied. The work presented in this dissertation focuses on exploring the impact of …

Comprehensive Study Of Energy Capturing, Conversion, And Transportation Behaviors In A Piezoelectric Vibration Energy Harvesting System, Bingqi Zhao

Mechanical & Aerospace Engineering Theses & Dissertations

Piezoelectric vibration energy harvester (PEH) is one of the hottest research areas to address renewable energy issues with over 10,000 journal articles published in the last two decades. However, several critical issues, such as the proof mass effects, electrical impedance, mechanical resonance, and energy charging processing, remain open. This dissertation presents a comprehensive study addressing the above issues.

To obtain reliable results, a professional quality flextensional PEH (FPEH) and multiple comprehensive experimental methods were developed, and ANSYS FEM modelling was used. Study of the proof mass effect indicated that the generated voltage linearly increased with the weight ratio of the …

Simulating The Compound Impacts Of Climate Change And Sea-Level Rise On Coastal Shallow Groundwater Using An Integrated Surface-Subsurface Hydrologic Model, Zhaoyi Cai

Civil & Environmental Engineering Theses & Dissertations

As climate change intensifies and sea levels rise, coastal aquifers become increasingly vulnerable to interacting oceanic and terrestrial processes. This dissertation examines the combined impacts of climate change and sea-level rise (SLR) on coastal shallow groundwater using an integrated surface-subsurface hydrologic model, focusing on the low-lying Little Creek watershed (LCW) in Norfolk, Virginia. The SWAT-MODFLOW model, a coupled system, unifies land surface, streamflow, and groundwater processes, providing a comprehensive framework for watershed-aquifer analysis. Model parameters were derived from U.S. Geological Survey datasets, relevant literature, station records, and technical reports, followed by meticulous calibration. The validated model first simulated baseline groundwater …

Measuring Clas12 D(E, E′Π±) Cross Sections For E4nu, Caleb Fogler

Physics Theses & Dissertations

Neutrino experiments need neutrino event generators such as GENIE to simulate neutrino-nucleus (νA) interactions in order to measure neutrino oscillations. We need eA data to validate GENIE. GENIE d(e, e′ ) cross sections do not match data in the pion production region. Further analysis of this region can help constrain GENIE models. The goal of this project was to compare 4.244 GeV CLAS12 d(e, e′π±) cross sections to GENIE predictions. We analyzed data from the Fall 2019 run period of Run Group B (RG-B). We applied particle identification, fiducial, and vertex …

Computer Based Modeling For Small E-Vtol Propeller Performance, Ege Konuk

Mechanical & Aerospace Engineering Theses & Dissertations

The emerging field of urban air mobility (UAM) offers a novel transportation method for civil, commercial, and military applications. Vertical take-off and landing (VTOL) configurations present challenges for performance prediction during crucial flight operations. An advanced computational framework for predicting propeller performance in electric vertical takeoff and landing (eVTOL) aircraft during transition flight is essential for future concept designs. This research extends the Blade Element Momentum Theory (BEMT) to model propeller behavior at high incidence angles, crucial for eVTOL operation.

The study begins with a review of tilt-wing/rotor configurations for eVTOLs and tackles the complex aerodynamic phenomena associated with rotors …

An Examination Of Food And Alcohol Disturbance Based On Sexual Orientation In A Sample Of Women Who Binge Eat, Alicia M. Moulder

Psychology Theses & Dissertations

Food and alcohol disturbance (FAD), characterized by disordered eating behaviors in the context of drinking alcohol to enhance intoxication, counteract alcohol’s calories, or both, is associated with increased risk of negative drinking consequences. Previously established as a phenomenon occurring in college students, research has begun to support that FAD may also occur in nonstudents. Three particularly vulnerable groups for FAD may include women, individuals with history of binge eating, as well as sexual minority individuals. Consequently, the goals of the current study were to elucidate differences in FAD engagement between sexual minority women (SMW) and heterosexual women using a sample …

Competing In The Stress Olympics: Mid-Level Managers And Their Experiences Of Work Stress As Impacted By Their Supervisors And Organizational Climate, Melissa Jane Hecker Scott

Educational Leadership & Workforce Development Theses & Dissertations

Student affairs has a problem due to staff attrition (Rosser & Javinar, 2003). Most professionals leave the field due to job dissatisfaction, unhealthy work environments, high stress, and low morale (Marshall et al., 2016; Rosser & Javinar, 2003). Researchers have identified a relationship between job stress and burnout and intentions to leave the field of student affairs (Mullen et al., 2018). Turnover of positions is financially detrimental to the institution due to the cost of recruitment, hiring, and training the replacement employee (Agovino, 2019). In addition to the financial impact, when mid-level managers leave, there is a loss of institutional …

Real-Time Navigation System For Breast Cancer Surgery With Pre- And Intra-Operative Imaging Using Neural Networks, Motaz Alqaoud

Biomedical Engineering Theses & Dissertations

Breast cancer is one of the most frequently diagnosed malignancies in women worldwide, necessitating precise diagnosis and treatment. Breast-conserving surgery (BCS) is the primary treatment for nonpalpable cases, yet current approaches often lack accuracy due to the absence of real-time 3D imaging during surgery. This limitation impairs surgeons’ ability to visualize tumor locations, compromising outcomes and potentially leading to repeat surgeries with higher risks, undesirable cosmetic results, increased costs, and, in some cases, mastectomy. Thus, there is a critical need for a navigation system to facilitate accurate tumor excision in nonpalpable breast cancer through real-time patient-specific 3D tracking.

This study …

A Systems Theory-Based Framework For Uncertainty In Complex System Governance, Teresa Anne Crater

Engineering Management & Systems Engineering Theses & Dissertations

Complex systems are all around. A complex system is a system whose collective behavior is more than the behavior exhibited by the individual parts. Such a system is characterized by an exponential increase in information, complexity, ambiguity, emergence, and high levels of uncertainty (Jaradat, 2015). Uncertainty is intrinsic to complex systems. Uncertainty refers to epistemic situations involving imperfect or unknown information. Uncertainty can refer to the chance of certain anticipated outcomes occurring, or it can refer to the unknown events that are not foreseeable as to when or if one might occur. It applies to predictions of future events, to …

Workforce Education And Labor Market Demands For North Carolina Community Colleges, Christina Anne Bunch

Educational Leadership & Workforce Development Theses & Dissertations

In response to evolving labor market demands, community colleges play a crucial role in providing accessible, high-quality education that addresses regional workforce needs. However, they face challenges such as declining enrollments, misalignment with local market needs, and limited resources for curriculum adaptation. These obstacles threaten the ability of community colleges to prepare students for the rapidly changing workforce. This study examines how workforce development administrators collaborate with local industry partners to align programs with labor market demands, ensuring community colleges remain relevant and adaptable. Grounded in Human Capital Theory, which links education and economic growth, this qualitative study focuses on …

Weight Bias Internalization And Disordered Eating: Examining The Role Of Sexual Orientation In A Sample Of Women Who Binge Eat, Meredith I. Turner

Psychology Theses & Dissertations

Sexual minority women and heterosexual women endorse different rates of disordered eating symptoms. Weight bias internalization (WBI), or self-directed negative attitudes and beliefs about oneself due to their weight, is known to be associated with binge eating and other disordered eating behaviors. However, little is known about the influence WBI may have on disordered eating symptoms across various sexual orientations. Therefore, this study examined disordered eating, WBI, and the association between them among sexual minority and heterosexual women. Specifically, the study aims were to (1) compare instances of WBI and disordered eating symptoms between sexual minority and heterosexual women, (2) …

A Theoretical Framework For Resilience In Complex System Governance (Csg), Susan A. Caskey

Engineering Management & Systems Engineering Theses & Dissertations

This dissertation addresses a critical gap in resilience research within complex systems by developing a theoretical framework for governance resilience—an underexplored area despite governance's crucial role in maintaining system resilience. Using the Complex System Governance (CSG) framework (Keating, Katina, Chesterman, et al., 2022; Keating & Katina, 2019), resilience is conceptualized as a system's ability to absorb disturbances while sustaining performance and enabling adaptive transformation. This involves three main capabilities: persistence, adaptability, and transformation in response to both internal and external pressures.

Through a constructivist grounded theory approach involving iterative coding, memoing, and theory development, this study inductively constructs a governance …

Choosing To Bear Arms: Resistance And Identity Formation Through Louisiana’S Free Afro Creole Militia, Victoria Mcfarlane

History Theses & Dissertations

This thesis examines how African and Afro Creole men utilized the availability of and demand for forced and voluntary militia service under French, Spanish, and American governance as a mode of resistance to discrimination and repression within the social structures of the region. The influence and connections built through militia service were engaged to protect and preserve rights, customs, and opportunities for the Afro Creole community. From the establishment of the Louisiana colony until the Civil War, African and Afro Creole men utilized the service required in defense of their new home to gain freedoms, expand their personal and community …

Unveiling Resilience And Motivation Through Testimonios: Exploring The Influence Of Trio Student Services On Motivation And College Completion, Emily Leonard Garrison

Educational Leadership & Workforce Development Theses & Dissertations

This dissertation explores the impact of TRIO Student Support Services (TRIO SSS) on the motivation and college completion rates of first-generation rural community college students. Utilizing a qualitative approach centered on testimonios, this research captures the lived experiences of students at a rural community college in North Carolina, focusing on how TRIO SSS influences their educational journeys.

Through narrative inquiry, the study documents the personal stories of TRIO SSS graduates, highlighting the program's pivotal role in enhancing student retention and success. The findings demonstrate that TRIO SSS is essential in providing targeted support that aligns with the students' unique challenges …

Etdsuite: A Toolkit To Mine Electronic Theses And Dissertations To Enrich Scholarly Big Data Using Natural Language Processing And Computer Vision, Muntabir Hasan Choudhury

Computer Science Theses & Dissertations

In the past decades, there has been a growing interest in mining scientific documents to obtain domain knowledge automatically. One of the understudied types of scientific documents is Electronic Theses and Dissertations (ETDs), as ETDs have distinct features compared with conference proceedings and journal articles. ETDs usually serve as partial requirements of academic degrees for students pursuing higher education. They are book-length documents (i.e., 100 – 400 pages long), and the topics may shift across chapters, exhibit the significant contribution of a student’s research over the entire degree pursuing period, and have unique metadata schema and page layouts. However, the …

Does Job Satisfaction Take A Hit? The Relationships Between Employee Cannabis Use, Job Satisfaction, And Absenteeism, Caroline Jordan Moughan

Psychology Theses & Dissertations

Despite the frequency of cannabis use, limited research has examined how employees’ cannabis use relates to job attitudes and behaviors. This study responds to calls to examine the effects of employee cannabis use on work-relevant outcomes by exploring how employee cannabis use relates to job satisfaction and voluntary absenteeism by analyzing a sample of 526 employed young adults from the most recent three waves of the National Longitudinal Survey of Youth (NLSY) Child and Young Adult Cohort. Through estimating cross-lagged panel models, this study clarifies the direction of relationships between employee cannabis use and job satisfaction, and how these relate …

Thermal Management For Optimal Performance Of Unitized Regenerative Fuel Cells, Mythy T. Tran

Mechanical & Aerospace Engineering Theses & Dissertations

As the race to net zero energy intensifies around the world, hydrogen production and fuel cell technologies are attracting more attention, and the technologies are growing rapidly. Together, hydrogen production and fuel cell technologies hold potential for a reliable, green, and sustainable energy system. Hydrogen is an excellent energy carrier and can be produced from various sources, especially green and renewable sources. Fuel cells generate electricity and water from hydrogen and oxygen. In reverse mode, fuel cells operate as electrolyzers to produce hydrogen and oxygen from electricity and water. However, the major drawback that keeps hydrogen and fuel cells from …