Digital Commons Network^™

What Happens To Soil And Native Plant Life After Removal Of Lonicera Maackii In An Urban Temperate Forest?, Sheryl A. Gipson Hammond

Electronic Theses and Dissertations

In evaluating the potential effects of nitrogen cycles and pH on plant diversity and richness after the removal of Lonicera maackii in a temperate urban forest in Louisville, Kentucky, data was collected including nitrogen, pH, canopy, stem count, and plant surveys. The cutting and treatment with chemicals to remove L. maackii were successful one year after the treatments, but legacy effects ensued about five years thereafter. Native diversity waned as monoculture proliferated in some areas, including second invasions of the invasive. It was expected that nitrogen and pH would explain the success (or lack thereof) of native plant response as …

Online Optimization With Lookahead For Dynamic Assignment And Energy-Smart Scheduling In Manufacturing., Mahmud Parvez

Electronic Theses and Dissertations

Scheduling in online and dynamic manufacturing systems presents significant challenges due to the continuous arrival of customer orders with certainty only over a short time window and the dynamic availability of resources after completing ongoing operations. Similar challenges exist at our industry partner’s site when scheduling orders (computer servers) to machines (testing cells) during the final testing process before customer delivery. The primary challenge lies in dynamically assigning incoming orders to available machines in order to minimize the number of unfinished orders. Additionally, the energy-intensive nature of the production process introduces another challenge; efforts to reduce energy consumption often lead …

Biomechanical Assessment Of Fracture Risk In Young Children With Healthy Bone And Osteogenesis Imperfecta., Keyonna Mckinsey

Electronic Theses and Dissertations

Osteogenesis imperfecta (OI) is a group of genetic bone disorders that can range from a mild increase in fractures in one’s lifetime to perinatally lethal. Biomechanical assessment via finite element analysis (FEA) can be used to provide subject specific evaluation of fracture risk and thus aid in furthering understanding of likelihood of fracture due to loading associated with common daily activities. Thus, the purpose of this dissertation research was to characterize the risk of femur fracture in young children with OI compared to that of healthy children when exposed to loading associated with common activities, specifically gait. To accomplish this, …

Women And Gender Non-Conforming Introductory Stem Students Navigating Gender, Faculty Expectations, And College Support Systems., Trisha A. Douin-Manning

Electronic Theses and Dissertations

Women and gender non-conforming students remain underrepresented in Science, Technology, Engineering, and Math (STEM) majors within higher education, and gender disparities persist in advancement to high-paying STEM careers (Maloy et al., 2021; NSF, 2015; Riegle-Crumb et al., 2018). This three-article style dissertation uses qualitative interviews with 29 women and gender non-conforming introductory STEM students and 11 STEM faculty to investigate how these students navigate through their introductory STEM courses. Women and gender non-conforming students in this study faced academic, familial, and gendered pressures to succeed in introductory STEM courses. Many of the students in this study described feelings of oppression …

Everything And Nothing Found In The House Of Leaves: A Multiliterate Analysis Of Multimodal Writing., Jennings Collins

Electronic Theses and Dissertations

The postmodern horror novel House of Leaves engages in a bevy of discourses across the humanities, a complex work that invites readers to engage with several multimodal forms of reading and writing to experience it fully. This thesis hopes to explore the novel’s place in various sites of discourse including film theory, philosophy, and horror genre theory; applying a multiliterate perspective to the work to study how the novel encourages multimodal and multiliterate thinking by applying studies of typography, experimental literature, and literary ontology. This thesis will emphasize a filmic analysis of text-within-text The Navidson Record, to address a …

Perceptions Of Unstructured Recess And Classroom Behaviors In Elementary School Settings., Allison Shockley

Electronic Theses and Dissertations

The priority on core curriculum areas such as math and reading has resulted in limited physical activity and regular recess routines. With the increased time spent on core curriculum, teachers and administrators have shifted their focus towards standardized student testing achievement. This focus has resulted in limiting or doing away with unstructured recess with the hopes that students will gain more core curriculum knowledge. This dissertation will focus on educators' perceptions of elementary school student behavior with varying recess time structures. This study began by examining the history of recess while analyzing the trickled- down historical inequities elementary students experience …

Deep Learning In Lung Cancer Pre- And Post-Radiation Therapy: Diagnosis Of Malignancy And Radiation-Induced Lung Injury From 3d X-Ray Ct., Benjamin Peter Veasey

Electronic Theses and Dissertations

Lung cancer remains the leading cause of cancer-related mortality worldwide, with early detection and accurate diagnosis being critical for improving patient outcomes. Additionally, the progression of Radiation-Induced Lung Injury (RILI) following Stereotactic Body Radiation Therapy (SBRT) for lung cancer presents a significant diagnostic challenge. This dissertation addresses these challenges by developing deep learning-based diagnostic tools for both pre-treatment lung nodule malignancy classification and post-treatment RILI identification using 3D X-ray CT imaging. The research is divided into two primary objectives. First, for lung nodule malignancy classification, we developed a biopsy-confirmed dataset, called NLSTx, to train and evaluate deep learning models while …

Advancing Speech Intelligibility Assessment: Comparing School-Based Speech-Language Pathologists, Laypersons, And Speech Recognition Software., Hannah Stewart

Electronic Theses and Dissertations

This non-experimental study utilized a convenience sample (N = 86) to investigate the comparability of school-based speech-language pathologists (SLPs), laypersons, and speech recognition software in the assessment of speech intelligibility for children with phonological disorders. Eighty-nine percent of participants were female, and 92% were white. All participants completed a survey comprised of 25 audio recordings of single-word utterances from an AI-generated voice of a four-year-old male with a phonological disorder and were asked to select what word they believed was heard from a pool of 12 options. The survey also included a passage read by the same AI-generated voice, and …

Studies Of Pathways To T2d And Interventions Through A Dynamical System Model., Rafiqul Islam

Electronic Theses and Dissertations

Existing mathematical models investigating the progression of type 2 diabetes (T2D) over time primarily focus on glucose, insulin, β-cell mass, and other related factors, while often omitting fatty acids (FA) as an explicit variable—despite FA being a major energy source for the body. There exists a complex network of dynamical interactions among glucose, insulin, FA, and β-cell mass. To gain deeper insights into the metabolic dynamics and pathophysiology of T2D, it is essential to incorporate FA into such models. In this study, we extend the classic Topp’s GIβ model by explicitly incorporating FA and exploring its interactions with glucose, insulin, …

Thermal Characterization Of Lithium-Ion Batteries Under Fast Charging Conditions Using Infrared Imaging., Gowthaman Punithakumar

Electronic Theses and Dissertations

Lithium-ion batteries are widely used across various industries due to their long lifespan, high energy density, low self-discharge rate, and absence of memory effect. However, fast charging of Li-ion batteries can cause problems like lithium plating, mechanical damage, and overheating. Temperature plays a key role in battery performance. Measuring temperature accurately is important to improve battery life, efficiency, and safety. However, accurately measuring a battery's internal temperature remains challenging, and the appropriate measurement method depends on factors like range, accuracy, resolution, and cost. Choosing the right temperature measurement method depends on range, accuracy, resolution, and cost. In this study, we …

Exploring The Impact Of Social Interactions And Representation On The Development Of Engineering Students' Sense Of Belonging In A Summer Program., Liliana Martinez

Electronic Theses and Dissertations

Research has shown that engineering students from underrepresented minority (URM) populations experience significant retention gaps compared to their majority peers (Dickerson et al., 2014). One factor that can significantly promote academic success, retention, persistence, and psychological adjustment is a sense of belonging (Hausmann et al., 2007; Hoffman et al., 2002). There is evidence showing that Summer Bridge Programs (SBPs) can foster students’ sense of belonging (Strayhorn, 2019); however, little is known about the mechanisms through which an SBP impacts URM engineering students’ sense of belonging. This study addresses this knowledge gap by investigating the impact of the Brown Forman …

Multimodal Emotion Recognition For Human-Robot Interaction Across Neuro-Diverse Populations., Ruchik Mishra

Electronic Theses and Dissertations

This dissertation explores the integration of multimodal data streams and artificial intelligence pipelines to understand human affect in neurotypical and children with Autism Spectrum Disorder (ASD). This dissertation captures human affect in the context of human-robot interaction. For this, multiple studies have been presented with both children with ASD and neurotypical adults. This dissertation makes four contributions: 1) The first study introduces autonomy during perspective-taking teaching sessions by making verbal content generation through large language models (LLMs). This system is the first of its kind for teaching perspective-taking in a semi-autonomous manner under the supervision of domain experts. Furthermore, this …

Investigating Factors That Influence Rural Student Degree Attainment At Urban Institutions., Kevin Kelleher Buckley

Electronic Theses and Dissertations

Decades of research have shown that rural students attend college at rates lower than their non-rural peers. When they do attend college, they tend to stay closer to home. Considering that over two-thirds of higher education institutions in the United States are in urban areas, this presents two challenges—rural students limit their options for where to attend college, and urban institutions face difficulty attracting and retaining rural students. Very little quantitative research is available that explains what may make a rural student more likely to be successful at an urban institution or if the geographic origin of a student plays …

Applying Residence Time Distribution Theory To Coronary Thermodilution Curves., Jacob Michael Miller

Electronic Theses and Dissertations

Cardiovascular diseases remain the leading cause of death worldwide and coronary microvascular dysfunction is one cardiovascular disease which is particularly challenging to diagnose and treat. Coronary thermodilution is a widely used, invasive procedure to evaluate microvascular function by generating physiological indices such as coronary flow reserve and the index of microvascular resistance. Although commonly cited as an indicator dilution method in the cardiovascular literature, current coronary thermodilution techniques lack rigorous application of the accompanying mathematical framework, thereby leaving potentially valuable diagnostic information unexploited. This study bridges that gap by demonstrating the equivalence between indicator-dilution theory and residence time distribution theory …

An Automatic Colorectal Polyps Detection Approach For Ct Colonography., Mohamed Yousuf

Electronic Theses and Dissertations

Colon cancer, also known as colorectal cancer, is a significant health concern, with increasing incidence rates, particularly among individuals under 50. This rise has led experts to recommend the introduction of regular screenings at 45 years of age for adults at average risk. Early detection through such screenings can identify precancerous polyps, allowing their removal before they develop into cancer. This proactive approach has the potential to reduce colorectal cancer deaths by up to 60%. In addition, research indicates that people diagnosed before age 50 have better survival rates, which emphasizes the importance of early diagnosis. Therefore, adhering to recommended …

Bayesian Model Updating Of Structural Parameters Using Temperature Variation Data., Ujjwal Adhikari

Electronic Theses and Dissertations

Physical digital twins have now emerged as a technology in structural health monitoring and other domains of structural modeling. A Finite Element Model can be a tool for digital twin technology in conjunction with measured physical data. Developing an accurate digital model requires the integration of various parameters to replicate the real structure; however, temperature is dynamically changing, resulting in difficulty in the identification of structural parameters. Typically, temperature is considered noise or filtered out. Limited research has addressed the physics-based model using temperature variation related to structural modal properties. Finite Element Model Updating (FEMU) is a typical inverse problem-solving …

5g Network Slice Vulnerabilities And Exploit Chaining Through Enablers, John Breeden

Electronic Theses and Dissertations

Network slicing provides fundamental support for the enhanced features of 5G. Network slicing enablers, such as software-defined networking and network function virtualization facilitate the separation of the physical distributed infrastructures and the functions that create isolated slices. With this framework, the network slice is no longer under the control of a single entity. Multiple infrastructure providers share responsibility for the slice. The 5G architecture derives from multiple services, distributed over great distances, and managed by multiple parties. Each enabler and provider adds vulnerability to network slicing. We examine the interweaving of these enablers to identify vulnerabilities, discuss potential mitigation, and …

Heterotopias Of Confinement: Zoo Architecture And The Loss Of Elephant Agency, Clayton Gill Beasley

Electronic Theses and Dissertations

Zoos functions as a site where human-animal relationships are structured through built environments that mediate control and representation. This study examines zoos as heterotopias—spaces where power and surveillance are negotiated between human observers and captive nonhuman animals. While zoos are often framed as spaces of conservation and education, their architectural design reinforces hierarchies of observation and confinement, shaping both human perceptions of nature and the lived experiences of nonhuman animals. This research focuses on Asian elephants as a critical species within this framework, exploring how their captivity illuminates tensions between human-imposed structures and nonhuman autonomy. Drawing from theories of heterotopia, …

Leveraging Ai For Enhanced Multimedia Content Creation: College Students’ Perception On The Innovation, Georgina Amankwa

Electronic Theses and Dissertations

Artificial Intelligence (AI) has revolutionized multimedia content creation, enhancing efficiency and personalization. However, this rapid evolution has raised concerns about originality and ethical responsibility. This study explored college students’ perceptions of AI in content creation and its implications. Using a mixed-methods approach, the research combined surveys and qualitative insights to analyze how students engaged with AI tools. Findings revealed that while AI streamlined workflows, improved content quality, and boosted audience engagement, concerns about authenticity, intellectual property, and the diminishing role of human creativity persisted. Statistical analyses showed a strong correlation between frequent AI use and perceived benefits, yet ethical dilemmas …

A Causal Model Of Performance Shaping Factors For Human Reliability Analysis In Manufacturing., Prameet Ranjan Jha

Electronic Theses and Dissertations

Human reliability analysis is a critical component of probabilistic risk assessment, aimed at predicting and mitigating human errors in complex systems. This dissertation develops a novel approach to human reliability analysis in manufacturing by integrating structural equation modeling and Bayesian networks to improve the estimation of human error probabilities. Traditional human reliability assessment methods, such as the Standardized Plant Analysis Risk-Human Reliability Analysis (SPAR-H) and the Technique for Human Error Rate Prediction (THERP), provide structured techniques for estimating human error probabilities. However, these methods often fail to capture the complex interdependencies among performance shaping factors (PSFs), limiting their applicability in …

Dirty Dianthus: A Review Of The Microbotryum-Dianthus Plant Pathogen System., Roxanne Kaaren Hayes

Electronic Theses and Dissertations

Microbotryum dianthorum is a species complex of smut fungi that act as biotrophic plant pathogens of Dianthus flowering plants. This group of pathogenic fungi are situated within a larger group of fungi that act as biotrophic plant pathogens, some of which are responsible for extensive crop loss in our agricultural system. These pathogens are distinct from other Microbotryum species in their ability to infect not only a single host, but multiple hosts. Their unique ability to parasitize several plant hosts may unlock potential clues about the potential for emergent infection disease in crop systems. Previous work has established that these …

Healthcare Access And Agency In Material Culture: A Specialized Analysis Of Pharmaceutical Artifacts From Louisville’S West End., Sara Marian (Deurell) Ignacio

Electronic Theses and Dissertations

The American Victorian Period of the 1870s to 1920s was a time of significant transitions in medicine. In Louisville, Kentucky, this period saw an influx of Black healthcare professionals and the founding of Louisville National Medical College, the state’s first medical school open to people of color. A number of these professionals lived and/or practiced in the Beecher Terrace study area, which was excavated between 2017 and 2020. Patent medicine brands and archival records were examined qualitatively in order to understand neighborhood and case study household health concerns and consumer choice. Statistical analyses of the medicine bottles recovered during the …

Musical Influence And Propaganda During The Russian-Ukrainian War., Kamil Józef Pedziwiatr

Electronic Theses and Dissertations

This thesis explores the role of music as a tool of influence and propaganda during the Russian-Ukrainian war, examining its progression both in Ukraine and Russia from the beginning of the conflict to the present. The study traces how music has been employed by both nations to influence and shape public perception, reinforce national identity, and advance political agendas. In Ukraine, music has become a medium for resistance and solidarity. Ukrainian artists bring back the traditions of the Kobzari, the wandering minstrels of Ukrainian folklore, who used song to communicate stories of resistance, national pride and important historical events. Today, …

Engineering Solutions For The Transplant Supply Gap: Social Network Analysis, Artificial Intelligence, And Optimization In Living Kidney Donation., Joshua Nielsen

Electronic Theses and Dissertations

Kidney transplantation is the gold standard for treating end-stage renal disease, yet over 90,000 patients remain on the transplant waitlist. This dissertation introduces engineering-driven solutions to help reduce the transplant supply gap by addressing three challenges: illicit trafficking, donor recruitment, and evaluation inefficiencies. First, we model illicit organ trafficking networks using social network analysis. We demonstrate that targeting transplant clinics alone is insufficient to disrupt operations. Instead, disrupting the network requires detaining brokers who organize behind-the-scenes logistics—offering a more effective strategy for intervention. Second, we seek to identify a latent population of potential living donors who face barriers such as …

Managing Software Dependency Risks In Web Applications, Christopher Alan Scott

Electronic Theses and Dissertations

Web applications commonly rely on third-party software dependencies to reduce development time. This thesis examines how vulnerabilities in a dependency chain propagate to compromise an application. It analyzes two vulnerable Markdown libraries from the npm and Composer dependency ecosystems, both of which are used for managing packages in applications developed with JavaScript and PHP. The analysis demonstrates how each library’s sanitizing functions—intended for removing unsafe user input when transforming Markdown text to HTML—are defeated to achieve a cross-site scripting exploit and take control of the application. The paper discusses potential business impacts of a compromise, underscoring the need for security …

A Qualitative Study Exploring Senior Leaders’ Experiences And Perceptions In Addressing Workplace Sexual Harassment In The U.S. Federal Government: A Systems Perspective, Karen Jane Dean

Electronic Theses and Dissertations

Sexual harassment (SH) is a prevalent, costly, and often unreported problem in the U.S. Federal Government. Despite decades of research from multiple perspectives and recommendations to address SH, the problem persists and remains complex. While some researchers and U.S. Government agencies have called upon leaders to commit to eliminating workplace SH, others have suggested using an integrated conflict management system (ICMS) to manage the complexity, nuances, and conflicts. Even though there is a call for leadership to address SH, there is limited documentation in the literature about leaders’ experiences and perceptions in addressing the problem. Therefore, this qualitative study was …

Tennessee Magnet Schools: Examining The Relationship Between Magnet School Designation And Student Achievement In Secondary Public Schools, Alex Turner

Electronic Theses and Dissertations

The purpose of this quantitative study was to investigate the relationship between magnet school designation and student achievement in Tennessee secondary public schools. Three years (2021-2023) of student achievement data from the Tennessee Department of Education was used to analyze student performance in 24 magnet and 287 traditional non-magnet schools. Schools were included in the study if they operated continuously throughout the study period and were categorized as either a public magnet school or a traditional non-magnet school. Excluded from the study were virtual, charter, alternative schools, and early colleges.

Four research questions were crafted to guide this study. Student …

Application Of Deep Learning On Gage R&R For Anomaly Detection, Oluwatope Richard Ojo

Electronic Theses and Dissertations

This thesis explores the application of deep learning techniques, specifically autoencoder based models, to enhance anomaly detection within Gage Repeatability and Reproducibility (Gage R&R) studies—an essential component of Measurement System Analysis (MSA) in quality engineering. Traditional Gage R&R methodologies, while effective for linear and low-dimensional data, exhibit limitations in detecting subtle, nonlinear variations in complex measurement systems. To address this challenge, an unsupervised autoencoder was developed and trained on a synthetically generated dataset comprising 2,500 voltage measurements (5V and 33V) derived using Generative Adversarial Networks (GANs) based on real-world manufacturing data measurements.

The proposed autoencoder model achieved a 95th percentile-based …

Adapting To The Digital Age: Information Management Strategies For Improving Customer Perceptions Of Digital Banking In Ghana, Crystal Frema Davis

Electronic Theses and Dissertations

Mobile money services are crucial in the financial landscape of Ghana’s economy. Despite Ghana's successful Mobile Money Interoperability (MMI) project, significant disparities exist in digital banking service utilization. Using Design Science Research, this study examines customer hesitancy in digital banking adoption. The TIDE framework was developed by analyzing the information management practices and artifacts of MTN Mobile Money, Banks and reviewing the literature. It comprises three key pillars: Security Management, Customer Education, and Experience Enhancement. This framework aims to instill digital trust, improve service adoption and utilization, and promote financial inclusion and digital literacy. Expert reviews acknowledged its potential to …

The Reliability And Validity Of Accelerometry And Gnss, Christine Coniglio

Electronic Theses and Dissertations

This dissertation seeks to evaluate the reliability, validity, and utility of accelerometers and GNSS in sport-like scenarios, assess accelerometry-derived metrics and GNSS for distance prediction, and explore how accelerometer placement, specifically chest and back, affect the detection of various locomotor events. In Study I, the purpose was to investigate the accelerometer reliability and predictive capabilities of accelerometers and GNSS to predict a known distance. Thirty physically active female participants (mean height = 163.6 ± 6.8 cm, mean weight = 57.8 ± 8.7 kg) completed jogging trials over two courses (5m and 20m). Each participant wore two tri-axial accelerometers (100Hz) and …