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Graduate Theses and Dissertations

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Soft Urea Nitridation Of Tantalum-Based Thin Films For Oxynitride Synthesis, Rishabh Srivastava Jul 2026

Soft Urea Nitridation Of Tantalum-Based Thin Films For Oxynitride Synthesis, Rishabh Srivastava

Graduate Theses and Dissertations

Rising global energy consumption and the transition toward low-carbon technologies place new demands on functional materials. Particularly, semiconductors that convert sunlight directly into chemical fuels with high efficiency and long operational lifetimes. The synthesis of visible light active tantalum oxynitride (TaON) thin films for photoelectrochemical (PEC) water splitting typically requires ammonolysis with pressurized NH3 gas, which presents persistent barriers in safety and phase selectivity. In this work, a soft urea ammonolysis route was employed in which solid urea was employed as an in-situ nitrogen source inside a vacuum-sealed reactor. The finite urea mass establishes a self-limiting nitrogen chemical potential that …


Beyond Semantic Matching: Integrating Graph Structures, Boolean Logic, And Interactive Aggregation In Modern Retrieval, Quan Mai Jul 2026

Beyond Semantic Matching: Integrating Graph Structures, Boolean Logic, And Interactive Aggregation In Modern Retrieval, Quan Mai

Graduate Theses and Dissertations

Modern Natural Language Processing (NLP) and Information Retrieval (IR) systems have achieved remarkable success in semantic understanding; however, they continue to struggle with complex logical reasoning, structural interactions, and dynamic aggregation. This dissertation presents a comprehensive framework to enhance the structural, logical, and interactive capabilities of language models and retrieval systems across four progressive studies. First, we address the challenge of modeling dynamic conversational logic in online debates. We introduce a Sequence Graph Network (SGN) that captures the temporal and interactive exchange of ideas—such as counterarguments and reinforcements—by updating node features sequentially through a novel Sequence Graph Attention (SGA) layer. …


A Pilot Randomized Clinical Trial Examining The Efficacy Of Group-Based Parent-Child Interaction Therapy (Pcit) For Autistic Youth: A Mixed-Method Design, Julia L. Kiefer Jul 2026

A Pilot Randomized Clinical Trial Examining The Efficacy Of Group-Based Parent-Child Interaction Therapy (Pcit) For Autistic Youth: A Mixed-Method Design, Julia L. Kiefer

Graduate Theses and Dissertations

Caregivers of autistic children experience a myriad of barriers when seeking psychotherapy for their children including a lack of family-based treatment options, lengthy waitlists, and limited access to specialized therapists. As the demand for both accessible and affordable mental healthcare for autistic youth increases, group-based interventions may be a useful alternative to more time intensive individual treatment options – allowing for multiple clients to be seen at once. The present study examined the efficacy of an adapted evidence-based intervention, Parent-Child Interaction Therapy, to be delivered in a brief, group-based format with families of autistic youth. Driven by input from a …


Decoration Of Lactic Acid Bacterium By Exploiting In Vitro Sortase A Transpeptidase, Faisal Hamd Alqhtani Jul 2026

Decoration Of Lactic Acid Bacterium By Exploiting In Vitro Sortase A Transpeptidase, Faisal Hamd Alqhtani

Graduate Theses and Dissertations

Attaching a drug module to the surface of lactic acid bacteria was the main aim of this dissertation, and it was achieved. By using the Sortase A mechanism, the drug module (green fluorescent protein fused to the LPETG motif) was anchored to the LAB surface. To reach the final results, this dissertation will describe the process that I undertake to achieve the end goal. Modifying media, producing pure enzymes with less impurity, and reducing the protease activity in E. coli BL21 were all described in this five-chapter dissertation. Keywords: drug delivery, lactic acid bacteria, green fluorescent protein, sortase A, fusion …


The Gravity Of The Ukraine War: Measuring Conflict Impacts On European Grain Trade, Stefan Bonchis Jul 2026

The Gravity Of The Ukraine War: Measuring Conflict Impacts On European Grain Trade, Stefan Bonchis

Graduate Theses and Dissertations

This thesis investigates the heterogeneous structural disruptions caused by the war in Ukraine on the European Union’s agricultural trade architecture, focusing on three critical commodities: wheat, maize, and sunflower seeds. Employing a structural gravity model framework across all 27 EU Member States, the study evaluates two conflict episodes, the 2014 Crimea annexation and the 2022 full-scale invasion, to identify the net beneficiaries and heavily impacted nations within the EU agricultural trade network. The empirical strategy utilizes a dual-test design to capture the full scope of the disruption. Test A (Ukraine towards the EU trade) reveals a distinct geographic logic in …


Comparative Evaluation Of Similarity Metrics For Multi-Vendor Origin–Destination Matrix Comparison: A Case Study Using Data From Three Probe Data Vendors In Arkansas, Sagar Silwal Jul 2026

Comparative Evaluation Of Similarity Metrics For Multi-Vendor Origin–Destination Matrix Comparison: A Case Study Using Data From Three Probe Data Vendors In Arkansas, Sagar Silwal

Graduate Theses and Dissertations

The proliferation of commercial probe data vendors has posed both opportunities and challenges for transportation agencies regarding the choice of reliable vehicle probe data for decision making purposes. Probe data is a form of passive mobility data representing a small fraction of the traveling population. Vendors aggregate mobility data from different sources including GPS enabled smartphones, telematics systems, and connected vehicles. They possess unique data collection methodologies, sampling mechanisms, and expansion algorithms which introduce variability in derived traffic performance measures like speed and volume. The overall objective of this work is to assess similarities and differences among probe data vendors …


Identification Of Conditionally Essential Genes Required For Salmonella Enterica Serovar Typhimurium Adaptation To The Chicken Cecal Extract Through Ex Vivo Modeling And Transposon Insertion Sequencing, Deborah Bukola Olubanjo Jul 2026

Identification Of Conditionally Essential Genes Required For Salmonella Enterica Serovar Typhimurium Adaptation To The Chicken Cecal Extract Through Ex Vivo Modeling And Transposon Insertion Sequencing, Deborah Bukola Olubanjo

Graduate Theses and Dissertations

Salmonella enterica serovar Typhimurium (S. Typhimurium) remains a major foodborne pathogen associated with chicken, where it can persist in the intestinal tract without overt disease and contribute to zoonotic transmission. The chicken cecum represents a complex ecological niche shaped by microbial competition, host-derived substrates, short-chain fatty acids, oxygen limitation, extracellular components, and diverse metabolic gradients. Although transposon insertion sequencing (Tn-seq) has been widely used to define bacterial fitness determinants, limited work has examined genome-wide adaptation of S. Typhimurium in chicken ceca-derived ex vivo systems that preserve key features of the avian cecal environment. This dissertation investigated conditionally essential genes required …


In The Shadow Of The Steeple: A Theory Of Religious Hypocrisy, Justin Arthur Rice Jul 2026

In The Shadow Of The Steeple: A Theory Of Religious Hypocrisy, Justin Arthur Rice

Graduate Theses and Dissertations

In this dissertation, I explore how Christian doctrine and practice respond to the pressures placed upon them by the troubling reality of religious hypocrisy (RH). Assuming a teleological notion of social institutions, I argue that RH is best understood in relation to the Church as an institution, and that RH occurs when religious agents undermine or subvert their appointed role within the Church. RH consists in the conscious or unconscious charade of spiritual or moral virtue undertaken in one’s capacity as a member of a religious institution, grounded in a fundamental disparity between one’s thoughts, words, desires, motivations, or deeds, …


From Learner To Leader: Exploring Principals' Perspectives On Professional Learning, Development, And Mentoring, Eric William Kausch Jul 2026

From Learner To Leader: Exploring Principals' Perspectives On Professional Learning, Development, And Mentoring, Eric William Kausch

Graduate Theses and Dissertations

This purpose of this qualitative study was to examine veteran secondary school principals’ engagement in professional learning, development, and mentoring for the improvement of their leadership skills. While previous literature provides insight into administrative preparation programs, mentoring of novice leaders, and succession planning for those advancing their careers, there are fewer studies that discuss enhancing experienced principals’ leadership development. The study was guided by three research questions: (1) How do principals describe their experiences participating in professional learning and development? (2) What types of leadership experiences do principals engage in to improve their leadership skills? and (3) How does engaging …


Online Sports Betting Legalization And The Reallocation Of Retail Investor Information Search Toward Lottery-Type Stocks, Jared Richard Stark Jul 2026

Online Sports Betting Legalization And The Reallocation Of Retail Investor Information Search Toward Lottery-Type Stocks, Jared Richard Stark

Graduate Theses and Dissertations

I examine whether the legalization of online sports betting is associated with a reallocation of retail investors' information search across stocks around firm earnings announcements (EAs). Prior work links legalization to a reallocation of household capital, but its association with information search has not been examined. Exploiting the staggered timing of legalization following Murphy v. NCAA, I use four treated and four matched control states over 2017-2024 and measure search using state-level Google Trends data for firm tickers. Treated and control states are already on different trajectories before any legalization, which confounds the average-level comparison. The association I can document …


Advancing Social Media Analytics And Personalized Generation Via Transfer Learning, Discourse-Aware Modeling, And Collaborative Modeling, Gibson Nkhata Jul 2026

Advancing Social Media Analytics And Personalized Generation Via Transfer Learning, Discourse-Aware Modeling, And Collaborative Modeling, Gibson Nkhata

Graduate Theses and Dissertations

Social media platforms have become central to information exchange, shaping public opinion across social, political, and economic domains. However, the massive volume of user-generated content, combined with its informal, nuanced, and often noisy nature, presents significant challenges for automated analysis and generation. Tasks such as stance detection, rumor verification, and personalized content generation are further complicated by sarcasm, evolving discourse structures, and diverse user preferences. Addressing these challenges requires models that can effectively leverage linguistic nuance, conversational dynamics, and collaborative user signals. Transfer learning has emerged as a powerful paradigm for improving performance in low-resource and complex language understanding tasks. …


Black Americana: Packaging Black Critique For White Consumption, Sean Bloemetjie Jul 2026

Black Americana: Packaging Black Critique For White Consumption, Sean Bloemetjie

Graduate Theses and Dissertations

In this project, I extend the theorization of Black Americana, a conservative, racialized mass media project where Black celebrities, through the assertion of the American-ness and promotion of the American empire, engage in the containment of Blackness and Black people. Historically, Black Americana was conceptualized by Michele White around the online marketplace for racist, caricatured, slavery-era memorabilia, but I argue that this practice has morphed and evolved into a prominent form of mediated Black subjugation by Black elites. Utilizing Whitney Houston’s performance of the national anthem as a case study, I argue in the introduction that, by insisting upon her …


Designing Functional Nanolaminates From Complex Atomic Layer Deposition Reactions, Joseph Joel Muhanga Jul 2026

Designing Functional Nanolaminates From Complex Atomic Layer Deposition Reactions, Joseph Joel Muhanga

Graduate Theses and Dissertations

Atomic layer deposition (ALD) enables precise cycle by cycle control over film thickness and composition. This kind of control is ideal for the engineering of functional nanolaminate coatings with tailored optical properties. Since ALD synthesized composite films are deposited as discrete, stratified layers and not as homogeneously intermixed solids, it is not yet clear when such composites can be be treated with the effective medium approximation (EMA). EMA is simplification that is important to the design of mixed oxide coatings. This dissertation addresses that question using a model system, and then asks whether the same approach can be used to …


Soilless Substrates As A Critical Control Point For Mitigating Food Safety Risks Within Hydroponic Leaf Lettuce Production, Eric Nuertey Tetteh Jul 2026

Soilless Substrates As A Critical Control Point For Mitigating Food Safety Risks Within Hydroponic Leaf Lettuce Production, Eric Nuertey Tetteh

Graduate Theses and Dissertations

The effect of hydroponic soilless substrates and microbial biocontrol agents on the persistence of foodborne pathogens in indoor lettuce production is variable depending on substrate type, pathogen species, and biocontrol formulation. This study addressed key gaps by first characterizing the ability of different substrates to support Salmonella and Listeria monocytogenes survival and then evaluating the ability of pine biochar and Bacillus subtilis to suppress pathogen persistence in selected substrates under controlled conditions. In the first experiment, the persistence of Salmonella and L. monocytogenes was evaluated in four soilless substrates: rockwool (RW), low density foam (LDF), peat moss (PM) and coco …


The Narrative Dynamics Of Special Books By Special Kids Youtube Videos And Comments: A Study Of Disability Rhetoric And Public Narrative Engagement, Jessica Louise Allee Jul 2026

The Narrative Dynamics Of Special Books By Special Kids Youtube Videos And Comments: A Study Of Disability Rhetoric And Public Narrative Engagement, Jessica Louise Allee

Graduate Theses and Dissertations

Digital media has expanded disability advocacy and community building by enabling accessible, visual storytelling and connection. Special Books by Special Kids (SBSK), a YouTube channel using interview-based disability storytelling, foregrounds people’s experiences with disabilities in the videos, while inviting viewers to interpret, identify with, and respond in the comments. As a participatory storytelling space, SBSK offers a site for examining how disability meanings are constructed, negotiated, and transformed through narratives, multimodal practices, and audience uptake, while revealing how dominant disability rhetoric or ableist discourse that positions people with disabilities as burdens, inherently deficient, or socially devalued, can be reproduced, complicated, …


Fugue State: The Body Politic Of Identity Theatre, Sean Patrick Ryan Jul 2026

Fugue State: The Body Politic Of Identity Theatre, Sean Patrick Ryan

Graduate Theses and Dissertations

This paper will cover my approach as an actor and a creator in two separate productions during my time at the University of Arkansas. The first is a solo theatre piece that I devised under the tutelage of Michael Landman. This work, Half Brother, is a piece of theatre that takes an abstract approach to exploring the familial and psychological ripples that can occur in the life of a queer person when a parental unit takes on a political and religious identity that is oppositional to the LGBTQ community. It exposes the effect this transformation has on the child, their …


Inherent Frames Of Mind, Karlena Fletcher May 2026

Inherent Frames Of Mind, Karlena Fletcher

Graduate Theses and Dissertations

Inherent Frames of Mind is a mixed-media painting series that serves to investigate and celebrate the intersections between the artist and the family, friends, and places that have shaped her. These people and environments are embodied abstractly in the artwork by inanimate objects, flora and fauna, patterns, colors, and materials that are shared between them. It investigates the phenomenon when otherwise peripheral items are transformed into cornerstones of the artist’s history. These items are juxtaposed within hybrid compositions of floating imagery, ready to be scrutinized and cherished. This thesis also outlines the artist’s return to her most inherent ways of …


Agritourism Marketing Communications: An Analysis Of Practices And Challenges In Arkansas, Kyla Paige Moseley May 2026

Agritourism Marketing Communications: An Analysis Of Practices And Challenges In Arkansas, Kyla Paige Moseley

Graduate Theses and Dissertations

Agritourism is seen as an avenue for operators as another channel of income, as well as a way for the visitors to learn about and experience agriculture. Marketing communication is needed by these operations to be visible to their communities. However, there is limited literature on agritourism marketing communications practices and challenges, especially in Arkansas, and on the use of word of mouth (WOM). This study aimed to fill that gap and provide practical recommendations to agritourism operators, extension offices, and the Arkansas Agritourism Association (ArAA) on how to better market operations. Using semi-structured interview questions, ArAA operators were asked …


Exploring Google Trends In Assessing Personal Finance Needs For Cooperative Extension Service Programming, Megan Wells May 2026

Exploring Google Trends In Assessing Personal Finance Needs For Cooperative Extension Service Programming, Megan Wells

Graduate Theses and Dissertations

The Cooperative Extension Service (CES) relies on systematic needs assessments to guide program development; yet, traditional approaches often depend heavily on stakeholder input and professional judgment, offering limited insight into consumer level needs. This mixed methods study explored Google Trends as a complementary, consumer driven data source for assessing Family Resource Management (FRM) needs within the Arkansas CES. Grounded in Witkin and Altschuld’s three level needs assessment framework and Uses and Gratifications Theory, the study integrated three data sources representing stakeholders, service providers, and consumers: (1) Family and Consumer Sciences (FCS) advisory committee reports, (2) survey of Family Consumer Science …


Dissecting The Complex Genomic Landscape Underlying Oxidative Stress Resistance Using Natural Variation In Yeast, Sonali Lakshika Anne Lenaduwe May 2026

Dissecting The Complex Genomic Landscape Underlying Oxidative Stress Resistance Using Natural Variation In Yeast, Sonali Lakshika Anne Lenaduwe

Graduate Theses and Dissertations

Stress is experienced across the tree of life. Survival in fluctuating environments depends on a robust genetic architecture. This dissertation examines the genetic and metabolic determinants underlying one such adaptive response: cross-protection. Leveraging natural variation in the stress responses of budding yeast, Saccharomyces cerevisiae, I examine the genetic variation contributing to ethanol-induced cross-protection against oxidative stress. Acquired stress resistance, in which mild pre-exposure improves survival to subsequent stresses, is prevalent across diverse organisms and can involve both same-stress and cross-protection. Using high-throughput bulk segregant analysis (BSA-seq) and advanced intercross mapping populations derived from natural yeast isolates, I identify quantitative trait …


Every Why Hath A Wherefore, Harrison Baxley May 2026

Every Why Hath A Wherefore, Harrison Baxley

Graduate Theses and Dissertations

This thesis investigates techniques learned in classes at the University of Arkansas that would prepare me for my thesis role as both Dromio twins in The Comedy of Errors. The fast-paced production required a demanding performance from me mentally and physically, with rapid changes between each character. This project breaks down developmental training from One Person Show and Acting Studio classes that would prove essential to my thesis role. The result of this project has led to a toolbox for approaching a career in clowning, multi-character performance, and audience connection.


Mechanisms Of Bacterial Glucokinase Inactivation Through Site-Specific Lysine Modification And Chemical Inhibition, Joseph Robert Will Andrews May 2026

Mechanisms Of Bacterial Glucokinase Inactivation Through Site-Specific Lysine Modification And Chemical Inhibition, Joseph Robert Will Andrews

Graduate Theses and Dissertations

Glycolysis and related metabolic pathways are controlled by various post-translational modifications (PTMs) that affect enzyme activity and metabolic flow. In E. coli, glucokinase (GLK) sits at the crossroads of glycolysis and the pentose phosphate pathway and carries out the first committed step of glycolysis: ATP-dependent phosphorylation of glucose. While it's known that glucose binding causes GLK to close its domains, how phosphate binding, lysine modification, and small-molecule inhibitors regulate GLK's shape and function is still not fully understood. Here, I combine structural biochemistry and enzymology to figure out how phosphate binding, specific mutations, and chemical inhibitors affect E. coli GLK. …


Perceptions Of Academic And College Preparation Skills Gained Through Concurrent College Credit Courses: A Case Study Of Students From Rural, High-Poverty Communities, Jessica Erin Culver May 2026

Perceptions Of Academic And College Preparation Skills Gained Through Concurrent College Credit Courses: A Case Study Of Students From Rural, High-Poverty Communities, Jessica Erin Culver

Graduate Theses and Dissertations

Abstract Concurrent college credit courses are growing at a rapid pace nationwide, with large numbers of high school students now earning college credit before the end of their twelfth-grade year. In Arkansas, this trend of increased concurrent college course enrollment is evident, with over 23,000 students enrolled in concurrent courses during the 2024 school year (Arkansas Division of Higher Education, 2024). Arkansas continued to emphasize the need for concurrent courses with the 2025 ACCESS Act, encouraging students to take concurrent courses as a path to future college and career success (Arkansas Division of Higher Education, 2025a). As concurrent courses continue …


The Impact Of Change In The Legal Definition Of Confidentiality On The Redaction Behavior Of U.S. Firms, Alexey Alferov May 2026

The Impact Of Change In The Legal Definition Of Confidentiality On The Redaction Behavior Of U.S. Firms, Alexey Alferov

Graduate Theses and Dissertations

U.S. public companies may redact information from material contracts in SEC filings as long as such information is not considered to be material by the SEC and when it is the type of information that the registrant treats as private and confidential. In 2021, the SEC revised redaction regulations in response to the expansion of the legal definition of ‘confidential’ by the Supreme Court of the United States. In this paper I examine whether these changes, referred to as FMI Amendments, impact companies’ decision to redact information from their material contracts filed with the SEC. In addition, I extend Thompson …


Will The Demons Follow (And Other Stories), Eberechi Onyekachi Mcbride May 2026

Will The Demons Follow (And Other Stories), Eberechi Onyekachi Mcbride

Graduate Theses and Dissertations

Will The Demons Follow (and Other Stories) is a collection of interconnected short stories that examines memory, trauma, migration, and womanhood across Nigerian and diasporic spaces. Set in both Nigeria and the United States, the stories move between villages, cities, and immigrant communities, presenting characters whose lives are shaped by cultural expectations, spiritual beliefs, family authority, and personal longing. Through multiple narrative voices, the collection considers how the past continues to shape the present. Characters struggle with family conflict, religious pressure, sexual violence, and the psychological burdens carried across borders. In the title story, “Will The Demons Follow?”, the narrator …


H.A.G.S., Erin Pinkham May 2026

H.A.G.S., Erin Pinkham

Graduate Theses and Dissertations

H.A.G.S (Have A Great Summer) The book transports the reader into a Y2K southern suburban landscape, influenced by Texas Megachurches, the height of the shopping mall era, and the upcoming and ever present loom of the internet. It narrates through this world by diving in and out of a younger and older voice. A voice that remains in the present tense as it searches through the speaker’s understanding and observance of the world around them and the danger looming over their young girl body. This book looks to uncover these moments where we as young girls might better understand why …


Through The Looking-Glass: A Process Of Trust And Discovery, Selena Mykenzie Gordon May 2026

Through The Looking-Glass: A Process Of Trust And Discovery, Selena Mykenzie Gordon

Graduate Theses and Dissertations

This thesis explores the process of joy, trust, and discovery I have cultivated as a professional actor and its application in various productions. I will examine my role as Sabine in Ken Ludwig’s The Three Musketeers at TheatreSquared in Fall of 2025, as well as the role of Alice in my One Person Show, titled Curiouser, developed in Spring of 2024. Included in this document is my artistic statement, my one-person show script, production posters and programs, production photos, website link, headshot and resume, my character analysis of Sabine, One-Person Show class writing prompts, and proof of permission for use …


Across The Pond And Veil: Spiritualists, Female Mediums, And Ghosts In The Nineteenth-Century United States And Britain, Allison Tucker May 2026

Across The Pond And Veil: Spiritualists, Female Mediums, And Ghosts In The Nineteenth-Century United States And Britain, Allison Tucker

Graduate Theses and Dissertations

This thesis examines how women mediums in the late nineteenth-century United States and Britain shaped Spiritualism and interpreted their respective social landscapes. Spiritualist mediums claimed the ability to communicate with spirits in the spirit world. These conversations with ghosts allowed mediums to speak on recent events, traverse social boundaries, and assume positions of authority. Drawing on trance writings, spirit-authored books, newspaper articles, and the performances of women mediums, this study compares the development and practices of Spiritualism in both countries. This thesis argues that proximity to violence significantly shaped Spiritualism during its formative years. The Civil War placed Americans in …


Situational Determinants Of Severity In Bias-Motivated Violence, Sophia Glick May 2026

Situational Determinants Of Severity In Bias-Motivated Violence, Sophia Glick

Graduate Theses and Dissertations

Although overall violent crime rates continue to decline, bias-motivated violence, including bias murder, is rising in the United States (United States Department of Justice, 2024). Criminologists have examined how situational factors—such as location, weapon use, and bystander presence—increase the likelihood of violence escalating to murder. However, it remains unclear whether these same factors similarly affect the severity of bias-motivated violence. These gaps are notable given that prior research suggests bias-motivated violence differs situationally from other forms of violence. Guided by the situational crime prevention (SCP) perspective, the current study investigates how situated attributes of factors reflecting the vulnerability and symbolic …


The Anti-‘Refugee Crisis’: A Comparative Analysis Of Anti-Immigrant Extremist Violence In The United States And The Nordic Countries, Ethan Mitchell May 2026

The Anti-‘Refugee Crisis’: A Comparative Analysis Of Anti-Immigrant Extremist Violence In The United States And The Nordic Countries, Ethan Mitchell

Graduate Theses and Dissertations

Using data from the U.S. Extremist Crime Database (ECDB), the Bias Homicide Database (BHDB), and the Right-Wing Terrorism and Violence (RTV) database, this study explores how attributes of anti-immigrant extremist violence compare across the United States and the Nordic countries. Compared to the long, complicated history of U.S. immigration and anti-immigrant violence, the homogeneity of the Nordic nations has only relatively recently been interrupted by mass immigration events like the mid-2010s’ “refugee crisis.” Rapid demographic change in these nations has inspired increased levels of extremism targeting immigrants and refugees. Quantitative analyses of cases ranging from 1990-2022 illuminate how broader social, …