Digital Commons Network^™

The Modernization Of Large Power Transformer Tanks, Babajide O. Williams

Electronic Theses and Dissertations

Due to the current demands placed on the power grid in terms of climate change, increasing urbanization, and terrorist attacks, the U.S. government in response to these demands, mandated that all the grid components be modernized in order to increase their reliability. As a critical component of the grid, Large Power Transformers (LPTs) play a key role in ensuring sustainable power generation and distribution. A literature search performed in this work and the analysis of data retrieved from the search showed that the tanks of these LPTs are critical to their durability, longevity, and reliability. Therefore, the reliability of LPTs …

Design Of Hybrid Inverters Using Wideband Gap Semiconductors For Microgrid Application, Luca Gacy

Electronic Theses and Dissertations

As the world becomes more reliant on renewable energy sources such as solar and wind power, the need for high efficiency high power inverters connected to homes is more relevant than ever. Connecting these renewable energy sources (RES) coupled with an energy storage system (ESS) to the grid through a hybrid inverter, with the highest efficiency and grid stability, is quickly becoming a necessity for the near future. This thesis explores the integration of wide band gap semiconductors for the power stage in these systems, along with the analysis of hybrid inverter topologies and structures. The goal of this thesis …

“Omg, I Think You May Have Just Changed My Life”: Binge Eating Disorder Recovery In Instagram Comment Sections, Caitlin Roe

Electronic Theses and Dissertations

As the internet and social media have become a more ingrained part of everyday life, online eating disorder pro-recovery communities have become a common topic of examination in the psychological sciences. However, there has been little focus on online binge eating disorder (BED) pro-recovery communities specifically. Additionally, there has not been much exploration into the use of comment sections as a part of pro-recovery communities. The current study used codebook thematic analysis to code ten BED pro-recovery Instagram comment sections to examine the interactive data present within this recovery community. Four themes were developed during analysis: detailed self-disclosure, sharing experiences …

The Rural Post-Graduation Plan Development Model: Advancing Student College Choice By Centering Rural Communities, Steve Jenks

Electronic Theses and Dissertations

College choice models have been used since the 1980s to try and explain the processes and influences high school students use to decide if and which college to attend after graduation. These models focused solely on college attendance and lacked attention to the nuanced needs and resources found in rural communities. In this three-paper dissertation, a new, rural-centric model is proposed, tested, critiqued, and revised. The first paper proposes a new conceptual model of Rural Post-Graduation Plan Development using a critique and synthesis of prior college choice models, Critical Rural Theory, Funds of Knowledge, and socio-ecological models. The second paper …

The Vigor Of Creative Materialism: Making The Hidden Stories Of Underrepresented Engineering Students Visible, Katherine A. Robert

Electronic Theses and Dissertations

Despite decades of initiatives, engineering education continues to lack diversity. The proportion of women, BIPOC, LGBTQA+, low-income, first-generation, and disabled students in engineering education remains below national population levels. The culture of engineering is a barrier to increasing participation in engineering for students from these communities. The purpose of this dissertation study was to explore the experiences of underrepresented engineering students as they are socialized into the culture of engineering. I theorized a novel conceptual framework called creative materialism that combines culturally responsive methodologies, new materialist theory, and arts-based research methods. Two research questions were used to guide the study. …

Patient Movement Monitoring Based On Imu And Deep Learning, Mohsen Sharifi Renani

Electronic Theses and Dissertations

Osteoarthritis (OA) is the leading cause of disability among the aging population in the United States and is frequently treated by replacing deteriorated joints with metal and plastic components. Developing better quantitative measures of movement quality to track patients longitudinally in their own homes would enable personalized treatment plans and hasten the advancement of promising new interventions. Wearable sensors and machine learning used to quantify patient movement could revolutionize the diagnosis and treatment of movement disorders. The purpose of this dissertation was to overcome technical challenges associated with the use of wearable sensors, specifically Inertial Measurement Units (IMUs), as a …

Thermal, Magnetic, And Electrical Properties Of Thin Films And Nanostructures: From Magnetic Insulators To Organic Thermoelectrics, Michael J. M. Roos

Electronic Theses and Dissertations

Modern fabrication and growth techniques allow for the development of increasingly smaller and more complex solid state structures, the characterization of which require highly specialized measurement platforms. In this dissertation I present the development of techniques and instrumentation used in magnetic, thermal, and electrical property measurements of thin films and nanostructures. The understanding of trapped-flux induced artifacts in SQUID magnetometry of large paramagnetic substrates allows for the resolution of increasingly small moments. Using these methods, the antiferromagnetic coupling of the interface between a Y₃Fe₅O₁₂ film and Gd₃Ga₅O₁₂substrate is quantitatively …

Novel Approach For Non-Invasive Prediction Of Body Shape And Habitus, Emma Young

Electronic Theses and Dissertations

While marker-based motion capture remains the gold standard in measuring human movement, accuracy is influenced by soft-tissue artifacts, particularly for subjects with high body mass index (BMI) where markers are not placed close to the underlying bone. Obesity influences joint loads and motion patterns, and BMI may not be sufficient to capture the distribution of a subject’s weight or to differentiate differences between subjects. Subjects in need of a joint replacement are more likely to have mobility issues or pain, which prevents exercise. Obesity also increases the likelihood of needing a total joint replacement. Accurate movement data for subjects with …

The Impact Of Brain Drain On Haiti's Rural Communities: The Case Of A Small Town In Central Haiti And Its Surroundings., Franst Choubert Rémy

Electronic Theses and Dissertations

This qualitative participatory action research study investigated the causes and impacts of brain drain on Haiti’s rural communities, focusing on a small town in Central Haiti and its surrounding communities. Research shows that the brain drain has affected developing countries for many years. The pull factors from developed countries make the push factors in the home country more evident, leaving the latter depleted of educated human resources. It is particularly true in rural communities in Haiti. The researcher aimed to understand the causes through a community-based series of interviews, focus groups, and narratives. Participants expressed their views on the phenomenon …

Blockchain Security: Double-Spending Attack And Prevention, William Henry Scott Iii

Electronic Theses and Dissertations

This thesis shows that distributed consensus systems based on proof of work are vulnerable to hashrate-based double-spending attacks due to abuse of majority rule. Through building a private fork of Litecoin and executing a double-spending attack this thesis examines the mechanics and principles behind the attack. This thesis also conducts a survey of preventative measures used to deter double-spending attacks, concluding that a decentralized peer-to-peer network using proof of work is best protected by the addition of an observer system whether internal or external.

Perception Of Alumni Of The Department Of Agriculture At Stephen F. Austin State University, Sherifat Rufai

Electronic Theses and Dissertations

University alumni surveys have served various purposes since they were introduced in the 1930s in the United States. The Department of Agriculture at Stephen F. Austin State University (SFASU) aimed to evaluate alumni perceptions between the Fall of 2010 and the Spring of 2022 to provide an opportunity to examine the relationship between degree fields and occupations and the agriculture curriculum, salaries, and demographic data for college graduates. This study's web-based survey was designed to include closed-ended and open-ended questions to collect individual opinions using Qualtrics Survey Software. The survey materials were made available on the alumni's social media accounts. …

The Cart Before The Horse?: A Phenomenological Study Of The Perspectives And Experiences Of Maker Education Supervisors In Independent Schools (9-12), Jesse Robinson

Electronic Theses and Dissertations

Over the past decade, makerspaces have increased in popularity all over the globe (Lou & Peek, 2016) and their addition continues to be a popular trend in the K-12 educational space. In the K-12 environment, the decision to implement a makerspace frequently consists of finding, repurposing, or building a suitable space, and outfitting it with the latest technology trends with the anticipation that ‘if you build it, they will come.’ As a director of a makerspace, my experience is that integrating curriculum across disciplines, or creating pedagogical goals for the makerspace, frequently becomes a priority after the space is designed …

3d Scanning And Characterization Of Skin Lesions, Amir Rastegar

Electronic Theses and Dissertations

Skin lesions, including burn wounds, are characterized by several key physical properties including the size, shape, and coloration of the wound. Assessing the state of the wound is critical to ensure the best chance of patient recovery. Initial assessments are typically done with visual inspection, which, given human eyes, is subjective and non-repeatable.

In this study, we investigated the feasibility of characterizing skin wound properties, such as surface area, based on the 3D model obtained with an iOS device, aiming for providing more accurate skin wound assessment than conventional 2D imaging based assessment. Since 2D images lack depth data, they …

The Future Is Now In Twisted Coil Polymer Actuators (Tcpa), Ryan Ronquillo

Electronic Theses and Dissertations

This thesis aimed to fabricate and test twisted coiled polymer actuators (TCPA) to understand the mechanical and thermal aspects of this artificial muscle fiber. The purpose of this thesis was to find a linear relationship using the LVDT sensor, fabricating TCPA fibers, and interpreting the data. The project tested whether nylon/polymer could be used as a better artificial muscle fiber.

This research accomplished three goals: (1) designing and fabricating a system capable of creating supercoiled muscle fibers consistently, (2) calibrating the Linear Variable Differential Transformer (LVDT) and Core, and (3) analyzing/interpreting the data of the Twisted Coiled Polymer Actuators (TCPA) …

Neil Postman's Loving Resistance Fighter: A Philosophy Of Communication In The Age Of Technopoly, Ryan Mccullough

Electronic Theses and Dissertations

This project walks the work of Neil Postman (1931-2003) into the philosophy of communication. Traditional conceptions of Neil Postman’s body of work position his ideas within the traditions of media ecology, general semantics, or, more broadly, as a form of media studies and criticism. In addition, others label Postman’s work, especially in Technopoly (1992), as pessimistic, deterministic, and/or imbibed with Luddite tendencies. This project articulates a different view and contends that Postman’s scholarship, in particular his articulation of the loving resistance fighter in the final chapter of Technopoly, is committed to resisting the nefarious forces embedded in both technology …

Peer Perceptions Of Parent-Students Seeking Higher Education, Alexandria Wall

Electronic Theses and Dissertations

With a growing number of parents pursuing academia, it is imperative that researchers understand the social environment in which parent-students function. Stereotypes of parent-students may be held by peers, faculty, and other educational supervisors. Across two previous independent studies, evidence and rationale were provided to suggest that both positive and negative perceptions of parent-students exist, with noted differences between gender. The purpose of the current 2x2x2 between-subjects study was to analyze the social perceptions of students enrolled in higher education as varied by parenthood status, age, and gender. The social perceptions included measures accounting for perceptions of intelligence and academic …

Phronesis And Philosophical Hermeneutics In Rhetoric And Philosophy Of Communication Praxis: A Pastoral Implication, Nichodemus Okafor

Electronic Theses and Dissertations

The overarching telos of this dissertation is walking the humanities into the marketplace. Its specific purpose is seeking how to enact the praxis of rhetoric and philosophy of communication. In keeping with Calvin Schrag’s “communicative praxis” and Ronald Arnett’s “responsive, learning rhetoric,” this research considers phronesis and philosophical hermeneutics as pragmatic tools of rhetoric and philosophy of communication praxis. It seeks the implication of rhetoric and philosophy of communication praxis in the pastoral field visualized as a marketplace, since the marketplace is not merely a place of capitalism, but a real world where people engage their concrete human condition/existence in …

The Change In Representation Of Women In Perfume Advertisements With Respect To Power, Rasika More

Electronic Theses and Dissertations

Gender portrayals in advertising have been examined extensively in the last six decades and remain an important topic. Certain brands have taken the initiative of destabilizing patriarchal norms entrenched in society by supporting modern trends and initiatives through various brand/product campaigns and advertisements that support the fluidity in power and representation. The present study navigates the changes in the representation of women in perfume advertisements that have taken place in the advertising world in the past two decades to see if women are shown to possess a sense of power with their head held high and strong posture, compared to …

Situation Awareness And Cognitive Load In Nursing Students Managing A Computer-Based Virtual Reality Simulated Deteriorating Patient, Tracy Chesney

Electronic Theses and Dissertations

Background: When a patient’s baseline clinical state shifts to a worse clinical state requiring a transfer to a higher level of care within the healthcare system, it is the hallmark of a deteriorating patient situation. Up to 37% of newly licensed nurses fail to identify and manage a deteriorating patient partly due to inexperience and a lack of expertise, contributing to lower situation awareness (SA), specifically in cue perception. Long-term memory schema development leads to expertise that allows individuals to develop higher SA necessary to identify and effectively manage patient deterioration. Expert nurses access long-term memory schema in managing deteriorating …

The Ethics Of Governance Of Data Analytics In Healthcare, Andrew Harrington

Electronic Theses and Dissertations

Recent literature and studies on data governance usually focus on data ethics and governance from a specific country or industry, which has been mostly business, without considering the larger global impact that is affected. Data is a worldwide asset; thus, its implications and considerations should be viewed as such. Hence, this dissertation attempts to incorporate this view by weaving together topics in healthcare, such as the blending of finance and delivery, data governance at the micro and macro levels, data analytics in healthcare, ethics of AI and information management, and technology’s impact on end-of-life practices. Through highlighting these areas of …

Super P-Sulfur Cathodes For Quasi-Solid-State Lithium-Sulfur-Batteries., Milinda Bharatha Kalutara Koralalage

Electronic Theses and Dissertations

Lithium-Sulfur (Li-S) batteries have become a promising candidate to meet the current energy storage demand, with its natural abundance of materials, high theoretical capacity of 1672 mAhg-1, high energy density of 2600 Whkg-1, low cost and lower environmental impact. Sulfide based solid state electrolytes (SSEs) have received greater attention due to their higher ionic conductivity, compatible interface with sulfur-based cathodes, and lower grain boundary resistance. However, the interface between SSEs and cathodes has become a challenge in all solid-state Li-S batteries due to the rigidity of the participating surfaces. A hybrid electrolyte containing SSE coupled with a small amount of …

Mach And Froude Numbers On Mars., Camella-Rosa Nasr

Electronic Theses and Dissertations

Mars atmospheric global circulation models exhibit transonic jet streaks during
northern winter, which motivates this study of the Mach number, Ma (the ratio of
flow speed to the speed of sound), and the Froude number, Fr (the ratio of flow
speed to the speed of buoyancy waves), as a function of season and location. Two
global reanalyses spanning Mars Years (MY) 24 to 33 are used as input, EMARS
and OpenMARS. The study’s vertical coordinate is the isentropic variable potential
temperature, θ, ranging from θ = 125 to 1100 K, which corresponds to altitudes
ranging on average from z ≈ …

Epicertin: Preclinical Development Of A Novel Mucosal Healing Agent For Ulcerative Colitis., Micaela Reeves

Electronic Theses and Dissertations

This dissertation describes the development of a biotherapeutic agent, EPICERTIN, that fulfills an unmet treatment need for ulcerative colitis (UC): mucosal healing. EPICERTIN is a recombinant cholera toxin B subunit (CTB) variant with a KDEL endoplasmic reticulum (ER) retention motif that is crucial for its wound healing capabilities. Previous studies have demonstrated that EPICERTIN’s mucosal healing activity is due, in part, to its prolonged residence in the ER which initiates an unfolded protein response (UPR) and subsequent TGF-β signaling and barrier repair in colonic epithelial cells. This activity was demonstrated in a dextran sulfate sodium (DSS) colitis model as well …

First Principles Study Of 2d Polar Heterostructures., Safia Abdullah R Alharbi

Electronic Theses and Dissertations

Recently, two-dimensional (2D) heterostructures have attracted extensive attention in nanomaterials science. They have been successfully fabricated and applied to nanotechnology in many fields, such as nanoelectronics, solar cells, sensors, energy stores, quantum information, etc. The most common heterostructures are 2D-lateral heterostructure (LH) and 2D-vertical heterostructure (VH) where each of them exhibits unique features depending on the direction of assembly, i.e., along in-plane or out-of-plane direction. Beyond the van der Waals-VH which possess of van der Waals (vdW) interaction, there are other types of heterostructures made of 2D polar materials that possess different types of chemical bonding nature, e.g., chemical bonds …

Still Got The Blues - No Time But Here, No Place But Now: Geographies Of Art & Activism In The Work Of Clyde Woods., Jake Mace

Electronic Theses and Dissertations

The fight against displacement and dispossession in the increasingly inequitable process of reterritorialization is arguably the most pressing struggle of the modern city – and it is articulated through cultural production as much as through political debate and economic development. Yet research that is at the nexus of critical, urban, and cultural studies and which explores the resistant potential of countercultural production rather than the hegemonic impact of mainstream cultural production is underdeveloped. Clyde Woods’s blues epistemology offers a guide to reading cultural production of marginalized groups as maps of meaning that offer alternative visions of the past, the present, …

Neonate Atlantic Sharpnose Shark (Rhizoprionodon Terraenovae) Relative Abundance And Body Condition In Two South Carolina Estuaries Varying In Urbanization, Rileigh E. Hawk

Electronic Theses and Dissertations

Urbanization near estuaries has been shown to affect the growth and survival of juvenile sharks using the system as a nursery. North Inlet and Murrells Inlet, South Carolina, are similarly-sized, tidally-dominated, bar-built estuaries with extensive Sporobolus-lined tidal creeks but differ in degree of human impact. Previously, Murrells Inlet was shown to have a lower abundance and diversity of large sharks than North Inlet and Atlantic Sharpnose Sharks (Rhizoprionodon terraenovae) were shown to use North Inlet as a primary nursery. To examine potential differences in neonate shark abundance and growth between a developed estuary, Murrells Inlet, and a protected estuary, North …

Non-Destructive Imaging Of Phytosulfokine Trafficking In Plants Using Fiber-Optic Fluorescence Microscopy, Bernard Abakah

Electronic Theses and Dissertations

Plants secrete peptide ligands and use receptor signaling to respond to stress and control development. Understanding these phenomena is key to improving plant health and productivity for food, fiber, and energy applications. Phytosulfokine (PSK), a sulfated peptide hormone, regulates plant cell division, growth, and stress tolerance via specific phytosulfokine receptors (PSKRs). This study uses fiber-optic fluorescence microscopy to elucidate trafficking of PSK in live plants. The microscope features two-color optics and an objective lens connected to a 1-m coherent imaging fiber mounted on either a conventional upright microscope body or 5-axis positioning system (X–Y–Z plus pitch and yaw). PSK and …

Teacher Instructional Strategies Impacting Rural, High-Poverty Student Academic Outcomes, Erin Kinney Burt

Electronic Theses and Dissertations

There is an abundant amount of interest among educators surrounding what actions can be taken by the government, local representatives, school boards, administrators, and teachers to assist rural, high-poverty students flourish academically. An uninspiring truth related to this subject is many times, a student receives the education the state and local communities are able to provide based on the quality of teachers they are able to retain and the resources available. Instructional strategies teachers implement could influence the quality of education students receive and could leave a community in a constant cycle of dependency and hardship. The purpose of this …

Comparison Of Traditional To Hybrid Modality Of Instruction, Paul Michael Spadaro

Electronic Theses and Dissertations

The COVID-19 pandemic caused unprecedented disruption in education across the United States. Prior to the pandemic, students in third grade struggled with low reading proficiency, a difficulty that predicts persistent academic struggles, school dropout, and even delinquency. Districts in South Carolina and around the United States adapted to the challenges of the COVID-19 pandemic in various ways, and among these strategies were a traditional learning modality, where students attended school only in-person and when possible, and a hybrid learning modality, where students alternatively attended in-person and remotely. It is important to understand the potential impacts of these scheduling decisions on …

How Marginalized Students Find Themselves Included In Syllabi: An Interpretative Phenomenological Analysis, Jean Kennedy Bennett

Electronic Theses and Dissertations

This dissertation presents the first known Interpretative Phenomenological Analysis (IPA) investigation of how marginalized students are included in syllabi. This study fills a gap in the literature due to the changing demographic of college students, the absence of faculty who share these marginalized identities, the syllabus being the first point of contact with students, and syllabi studies not including student voices. There were two research questions: how do marginalized students understand themselves as included in syllabi? and, how do marginalized students make meaning of their experiences with syllabi through their intersecting identities? This study used IPA to analyze each participant's …