Digital Commons Network^™

Integrating Self-Organizing Maps And Explainable Artificial Intelligence To Unravel Surface Water-Groundwater Hydrochemical Evolution And Drinking-Water Suitability Controls In A Data-Limited Arid Basin, Hui Tong, Ruizhong Gao, Yinlong Wang, Xixi Wang, Limin Duan, Guoqiang Wang

Civil & Environmental Engineering Faculty Publications

Study region

The Dahei River Basin, located in the semi-arid northern region of China's Great Bend of the Yellow River.

Study focus

This study integrates hydrochemical characterization, stable hydrogen-oxygen isotopes, Self-Organizing Maps (SOM), the entropy-weighted water quality index (EWQI), and explainable ensemble learning (XGBoost-TreeSHAP) to investigate surface water-groundwater evolutionary patterns and identify key hydrochemical contributors to drinking-water suitability in the Dahei River Basin.

New hydrological insights for the region

Waters in the basin are predominantly weakly alkaline and are characterized by HCO₃^--Ca-Mg and HCO₃^--Na facies, indicating the combined effects of carbonate weathering and cation exchange, with …

Supply Chain Attacks Through Open Source Software: A Comprehensive Analysis Of Npm, Pypi, And Docker Hub Vulnerabilities, Thomas Pham

Cybersecurity Undergraduate Research Showcase

Open-source software ecosystems have become critical infrastructure for modern software development, yet they remain vulnerable to sophisticated supply chain attacks. This paper presents a comprehensive empirical analysis of supply chain attacks targeting npm, PyPI, and Docker Hub, examining 23 documented campaigns affecting over 2.6 billion weekly downloads. Through systematic analysis of attack vectors including typosquatting, dependency confusion, and maintainer account compromise, we identify recurring patterns and structural vulnerabilities across package registries. Our analysis reveals that 86.1% of detected typosquatted packages contained malware, with cryptocurrency theft emerging as the predominant attack objective. We document the September 2025 npm compromise affecting 18 …

Viability Of Widely Used Encryption Schemes In Drone Transmission, Emanuel Yasir Nelson

Cybersecurity Undergraduate Research Showcase

This paper presents throughout research on the security issues related to drone transmission. These topics were addressed and explained, in particular the aspects relating to cybersecurity, for utmost clarity. These include threats and vulnerabilities, drone transmission the impact of encryption on latency, and the details of the encryption methods AES-128, AES-256, and ChaCha20 that were used in the experiment described in the paper. Each encryption method performance was measured and outputted by the Python code developed and used in the experiment. Afterwards, the performance of each method was analyzed in relation to their decryption time, encryption time, end to end …

Rogue Access Points And Their Impact On Networks, Sami Belmokhtar

Cybersecurity Undergraduate Research Showcase

This paper focuses on rogue access points (rogue APs) and how they can impact the security and stability of a network, and consequently, the safety and privacy of the users. Wireless access points (WAPs) are nodes that allow a user to connect to a local network. This includes devices such as the routers typically used in a home network. This paper examines how an unauthorized WAP may pose a threat to a network in both a public environment and an enterprise environment. Furthermore, it shows how a hacker can mimic a real wireless network and gain access to both user …

Twim #261: Overwhelming Microbial Greatness, Jenny Stoval, Briana Lanzarotta, Luke Boseman, Nicole L. Podnecky, Angela Wilson

School of Medical Diagnostics & Translational Sciences Publications

Podcast annotation TWiM #261: Overwhelming Microbial Greatness from the weekly podcast series "This Week in Microbiology" (TWiM), a podcast where experts in microbiology discuss academic papers in their field in an informal way.

Flood-Level Estimation Using Aerial Imagery, Yisen Zhang

Electrical & Computer Engineering Projects for D. Eng. Degree

Reliable flood-level estimation using aerial UAV (Unmanned aerial vehicle) imagery is essential for effective post-disaster assessment and rapid emergency response. This study utilizes a UAV-based dataset, referred to as the UVA dataset, which integrates multiple public datasets and manually labeled UAV images, together with a multi-stage vehicle-centric framework for flood-depth estimation. The UVA dataset integrates images from multiple public sources, including Unmanned Drone Water Assessment (UDWA), Unmanned Aerial Vehicle Detection and Tracking (UAVDT), Car Parking Lot (CARPK), and additional UAV-view images collected from the internet, followed by manual annotation for water depth, viewing angle, and altitude labels. In the proposed …

An Analysis Of Portuguese Colonial Representations Of Sinhalese Women, Chandra R. De Silva, Ramani Hettiarchchi

History Faculty Publications

The history of Sri Lanka until recently has been written mostly as the history of men in the country. This has been particularly true of the early modern period, for which existing records are mostly those of visiting colonizers who were mostly men, writing about their dealings with those in power or with those from whom they could gain profit. This article is an attempt to collect and analyze the admittedly limited data on how the Portuguese who gained political authority over parts of the coastal areas saw local women. It is limited to the women of the majority community …

A Systematic Review Of Corporate Ethics Program Training Strategies To Improve Ethical Workplace Cultures, Robin Raye Altice

Educational Leadership & Workforce Development Theses & Dissertations

The demand for corporations to practice more ethically responsible conduct and decision making is growing with every news report of another corporate scandal, lawsuit, fine, or high-visibility C-suite firing. To develop an ethical workplace culture, organizations should implement a comprehensive ethics program that fosters and encourages ethical decision making, especially among current and future leaders. However, there is little research and few guidelines for how ethics program administrators should design corporate ethics training to effectively practice and master the skill of ethical decision-making in efforts to continually grow a more ethical work environment. This study aims to identify corporate ethics …

Relativistic Three Particle Scattering, Md Habib E Islam

Physics Theses & Dissertations

In this dissertation, we develop and apply a relativistic framework for studying three-body scattering amplitudes, their analytic structure, and the emergence of universal phenomena such as the Efimov effect. The work integrates three complementary components.

First, we introduce a systematically improvable numerical method for solving relativistic three-body integral equations in momentum space. By discretizing the continuum problem into finite matrix equations and extrapolating to the continuum limit, we obtain stable partial-wave amplitudes in the presence of a two-body bound state. Two complementary treatments of the pole contribution are implemented and shown to reproduce previous finite volume results, with controlled estimates …

Exploring Student Confidence And Calibration Accuracy In College Algebra: A Mixed-Methods Explanatory Sequential Study, Courtney T. Hill

STEMPS Theses & Dissertations

Calibration, or students’ ability to predict and postdict their performance on an academic task, has important implications for academic performance. It can influence students' decision making processes concerning learning activities, as well as their levels of motivation and self-regulation (Kolovelonis, 2023). The literature on calibration is clear, often indicating that students are not great at these judgements (Lin et. al, 2001). While this phenomenon is well documented, it is not an easy one to explain. Therefore, a two-phase explanatory-sequential mixed method design was used to examine undergraduate students’ calibration judgements on a college algebra exam. To further contribute to the …

Terrestrial And Lacustrine Organic Matter Biomolecular Transformations Via Thermal Maturation And Oxidative Degradation, Louis Connor Bondurant

Chemistry & Biochemistry Theses & Dissertations

The most abundant source of fossil fuel-forming kerogen on Earth is classified as Type II kerogen, believed to originate from marine biomass. However, a significant amount of lacustrine and terrigenous carbon is transported to the ocean through fluvial discharge. Less than half of the exported organic carbon is observed in coastal regions and the open ocean. There is a great need for an explanation of what is happening to this organic carbon during transport and deposition. Traditionally, the marine organic matter in coastal regions accumulates to eventually be buried and transformed into petroleum over millions of years due to its …

Community College Student Parents And Their Experiences With Mindfulness Training, Polly Nesselrodt

Educational Leadership & Workforce Development Theses & Dissertations

Community college students who are parents (student parents) are highly motivated to succeed but face many challenges, including finances, transportation, and childcare, which leads to high levels of stress and anxiety. Mindfulness practices of returning to the breath and staying present in the body have been shown to help people manage stress and anxiety and live with greater ease. Using the stress and coping theory of Lazarus and Folkman (1984) as a theoretical framework, the purpose of this study was to examine the experiences of student parents who participated in mindfulness training. Participants attended mindfulness classes, facilitated by an instructor …

A Voice To Remember: Recovering The Rhetoric Of Mordecai Wyatt Johnson, Diana Lynne Nogay

English Theses & Dissertations

This dissertation will recover Mordecai Johnson's rhetoric to demonstrate how he addressed the political issues of his time, which were often related to race, and were frequently reduced or even forgotten. In this dissertation, titled “A Voice to Remember: Recovering the Rhetoric of Mordecai Wyatt Johnson,” I perform and analyze the rhetoric associated with him. Johnson was well known for being the president of Howard University; the goal of this project is to recover the rhetoric and identify the common themes. The two themes identified in Johnson’s rhetoric are religion and education. Personal traits and associations with religion are traced …

Making Explanations Make Sense: Xai For Smishing Detection, Eleni Alexandra Katsarakes

Psychology Theses & Dissertations

Explainable Artificial Intelligence (XAI) is a key component of effective human-AI collaboration, particularly in high-stakes domains such as cybersecurity. While AI tools hold promise for mitigating threats such as SMS-based phishing (SMiShing), their real-world effectiveness may hinge not just on detection accuracy, but on whether users can make sense of the system’s outputs. As SMiShing attacks grow in both frequency and sophistication, so does the urgency of designing human-centered AI systems that support user decision-making under uncertainty. This study examined how four distinct AI explanation types - Normative (rule-based), Attributive (feature-based), Exemplar (case-based), and Recommendation-Only - influence user performance, confidence, …

The Paradox Of Discipline: Equity, Standardization, And Black Student Outcomes In Public Schools, Latricia T. Davenport

Educational Leadership & Workforce Development Theses & Dissertations

Despite efforts to address profound discipline disparities impacting Black students, the implementation of alternative disciplinary approaches like Positive Behavioral Interventions and Supports (PBIS) and Restorative Justice (RJ) has failed to eliminate significant disproportionality in school discipline. This study investigates how teachers navigate the challenges of disciplining Black students within a paradoxical school environment that juxtaposes equitable, human-centered methods with a historically rooted managerial paradigm emphasizing uniformity and zero tolerance. Drawing upon systemic racism and the concept of 'apprenticeship of observation,' this study explores how teachers' implicit biases about Black students are formed by long-held institutional norms and personal experiences. It …

Sciteuq: Toward Uncertainty-Aware Complex Scientific Table Data Extraction And Understanding, Kehinde Ajayi

Computer Science Theses & Dissertations

Scientific tables report critical research insights, data, and findings for scientific progress. Because Portable Document Format (PDF) is the de facto standard format for scientific paper publishing, there has been an emerging need for an automatic method to extract data from PDF files. A significant fraction of scientific tables exhibit complex structure and content, making it challenging for machine learning tools to accurately extract the content directly from PDF files. Despite the advancements in Table Structure Recognition (TSR), automated extraction of data from complex scientific tables remains a challenge due to variations in table structures and contents. In this dissertation, …

A Reformation Of The Status Quo: An Examination Of The Relationship Between Organizational Structure And Social Justice Reform In American Public Schools, Jaielle Manning

Educational Leadership & Workforce Development Theses & Dissertations

This study explores the correlation between organizational structure and social justice reform in American public schools. The study specifically aims to answer the following research questions: What are the lived experiences of school leaders as they navigate and enact social justice reform? How do school leaders experience the ways organizational structures shape their opportunities and challenges in implementing social justice reform? How do school leaders experience and make sense of the influence of local, state, and national policy on their efforts toward social justice reform in American public schools? The literature review examined organizational structure through the lens of Ecological …

Comparative Analysis Of Emergent Behaviors Of Three Drone Swarm System Models For Targeting Using Agent-Based Modeling And Simulation, Arsenio T. Gumahad Ii

Engineering Management & Systems Engineering Theses & Dissertations

This dissertation introduces a novel computational simulation framework for evaluating the emergent behaviors of three swarm drone models using Agent-Based Modeling and Simulation (ABMS). The three swarm models are a Leader-Follower swarm model based on Bruckstein's antline theory, a Flocking model based on a simplified Reynolds 'Boids’ model, and a Stigmergic model with pheromone-based coordination. The primary objective of the simulation is to evaluate the performance of these models in delivering a user-defined number of drones of each type to a target area of interest in four separate scenarios, resulting in 50,000 separate simulation trials. Each scenario was structured to …

Large Language Models (Llms) For Clinical Note Generation: International Classification Of Disease (Icd) Code, Knowledge Graph (Kg) And Prompt Evaluation, Ivan P. Makohon

Computer Science Theses & Dissertations

In the past decade, a surge in the amount of electronic health record (EHR) data in the United States occurred, driven by a favorable policy environment created by the Health Information Technology for Economic and Clinical Health (HITECH) Act of 2009 and the 21st Century Cures Act of 2016. Clinical notes for patients’ assessments, diagnoses, and treatments are captured in these EHRs in free-form text by physicians, who spend a considerable amount of time entering them. Manually writing these notes is time-consuming, increasing patient waiting times and potentially delaying diagnoses. Large language models (LLMs), such as GPT-4o, possess the ability …

Observed Parenting, Parent-Child Aggression, And Intimate Partner Violence As Predictive Of Family Dysfunction, Paige Munshell

Psychology Theses & Dissertations

Family systems theories contextualize violence as occurring across multiple levels of the family, yet much of the existing literature focuses on a single family member’s outcome (i.e., the child) and neglects to include data collected from fathers. This study examined the associations between indicators of functioning at the dyadic-level in the family system—observed parenting, Intimate Partner Violence (IPV) perpetration, and Parent-Child Aggression (PCA) risk—and later overall family dysfunction. Participants were 180 mothers and 144 of their male partners evaluated when their child was 18 months old and re-evaluated at 4 years old. Measures of observed parenting, IPV perpetration, and PCA …

Leading With All The Feels: Exploring The Perceptions Of Middle School Administrators' Implementation Of School-Wide Social-Emotional Learning Programming, Sabrina Smith Richardson

Teaching & Learning Theses & Dissertations

Middle school administrators have multiple responsibilities that range from ensuring the safety and security of staff and students to overseeing the curriculum and instructional foci of their buildings. At the same time, middle school students are experiencing the early stages of adolescence. Because it is a complex time for students to navigate, it creates anxiety, a decline in academic achievement and motivation, and peer and academic pressures (London, 2022; Schlund, 2021). Middle school students have social-emotional needs that are not typically met in secondary schools, which means programming is not typically a part of the instructional day. This study examined …

Evaluation Of Ocean Lidar Enhancement Through Miniaturization And Gated Pmt-Based Range Extension, Chandler Austin Slater

OES Theses and Dissertations

Oceanographic lidar systems remotely characterize the vertical structure of the upper ocean by recording the light backscattered from a laser pulse as it propagates through the water column. Historically these systems have been constrained by limited detection ranges, often capturing only a portion of the illuminated water column, typically fading to noise around the 10% isolume. A primary constraint has been the limited dynamic range of digitizers, which inhibits the ability to resolve both intense near-field and faint far-field backscatter signals within a single acquisition. To address this, we developed a novel optical lidar system incorporating gated photomultiplier tubes (PMTs) …

Exploring Bonding Through Outdoor Recreation In Foster Care Utilizing Attachment Theory, Casandra L. Barnes

Communication & Theatre Arts Theses

As of 2024, there are over 328,000 children in foster care in the United States (AFCARS, 2024), many of whom experience disrupted attachments and trauma that hinder their ability to form healthy relationships. Drawing from attachment theory, this study explores how outdoor recreational activities can facilitate bonding between foster parents and their foster children. Using a mixed method approach this explorative research project consisted of two phases: a pilot study at the Virginia zoo involving foster families participating in a cooperative outdoor activity and completing post event surveys, and semi-structured interviews with foster parents to examine lived experiences of bonding …

The Presentation Of Self In Everyday Digital Life: A Study Of Self- Disclosure And Work Environments, Mackenzie Michelle Skiff

Communication & Theatre Arts Theses

The digital age impacts individuals’ lives in many ways. One impact is how and where work is completed across many careers. The work-from-home strategy enables individuals to complete work that is not within a shared space, such as an office. With the absence of this shared space, communication practices within workplaces could be changing. Specifically, self-disclosure while working from home may differ from self-disclosure within the office or hybrid (both in office and remote) work environments. This thesis investigates whether there are differences in self-disclosure practices across three different types of contemporary work environments and offers a digital update to …

The Influence Of Individual And Collective Social Capital On Teachers’ Decisions To Move Districts, Melinda Dawn Hodgkiss

Educational Leadership & Workforce Development Theses & Dissertations

Understanding what contributes to teachers’ decisions to stay or leave in a school district is complex. There is a need to further investigate factors that influence teacher retention and attrition so that policy makers and school leaders can be informed about practices that may replenish and sustain the educator workforce. In an effort to understand the essence of the lived experience of teachers who previously made a decision to move districts, this study used phenomenological methods for the purpose of discovering the role that access to individual and collective social capital played in teachers’ decision making. Semi-structured interviews were conducted …

Reflections In The Mirror: An Examination Of Racially Congruent Mentoring Of Black Teacher Candidates In A Teacher Education Program, Mary Louise Gregory

Teaching & Learning Theses & Dissertations

The high demand for Black educators in K-12 schools across the United States has caused several teacher training programs to rethink how they prepare Black teacher candidates for the teaching workforce (Andrews et al., 2019; Blazar, 2024; Milner & Howard, 2004). Improving teacher candidate training, especially for Black teacher candidates can boost K-12 Black teacher representation. Literature on Black teacher candidate’s experiences while being mentored identifies several challenges that include issues with implicit bias, microaggressions, stereotyping and other occurrences of racial discrimination (Daly et al., 2024; Hampton et al., 2008; Kardos & Johnson-Moore, 2010; Rodriguez et al., 2020). The process …

Unraveling The Links Between Substance Use And Academic Motivation In Higher Education, Melissa Lynn Goins

STEMPS Theses & Dissertations

Self-Determination Theory (SDT) posits that the quality of students’ motivation regulation (i.e., autonomous versus controlled) shapes both learning and health behavior, yet few studies have examined the relations among motivation regulation, alcohol and cannabis use, and achievement. In this study, I surveyed 459 undergraduates at a mid-sized public university in the southeastern United States. Participants completed the Academic Motivation Scale-College version 28 to assess autonomous and controlled motivation regulation, a typical-week alcohol grid, a seven-day cannabis grid, and self-reported grade point average (GPA). Results indicated that autonomous academic motivation was uniquely related to GPA; however, neither motivation variable related to …

Violence As An Ecology: Women Making Safety In Khayelitsha, Melissa J. Miller-Felton

Graduate Program in International Studies Theses & Dissertations

This dissertation asks how women in Khayelitsha make safety in a place where danger has become ordinary and where the afterlives of colonialism and apartheid still determine who waits, who walks, and who arrives home. What began as a study of risk and protection grew into an inquiry about time, dignity, and responsibility. I call the framework that emerged an ecology of violence—a way of seeing how harm gathers across generations and infrastructures, and how care, exhaustion, and survival intertwine within it.

In this ecology, violence is not a single act but a confluence of registers—slow, structural, colonial, and …

Bridging The Gap Between Network Science And Network Systems To Identify And Mitigate Cyber Risk: Identify And Mitigate Backdoor Attacks On Graph Neural Networks And On Complex Systems, Sabah Ettahri

Electrical & Computer Engineering Projects for D. Eng. Degree

This doctoral project aims to bridge the gap between graph theory and network science to identify and mitigate cyber risk, represented as a CY-Triangular Network that connects different networks. The CY-Triangular Framework is a cybersecurity system that integrates graph theory and network science through an interoperable learning approach. The objective of this project is to bridge the gap between two domains: network science and network systems. Accordingly, it examines one representative network from each field, focuses on a complex system network, and explores Graph Neural Networks (GNNs). The connection between these domains lies in graph theory. This research demonstrates that …

Crux: Exploring Imperialism And Resistance Through Role-Playing Games, Devon Gronka

Institute for the Humanities Master's Papers, Projects, and Capstones

This is a game about power. The game is a Role-Playing Game, or RPG. As with nearly all RPGs, the game presents the players with choices about how their characters will interact with each other and with the world around them, and these interactions are woven together to more or less form a plot. However, oftentimes in life there are no good choices available, and there is no win state outside of what we might determine for ourselves.

The game is a social experiment. While playing a game, a player takes in information in a very different manner than when …