Digital Commons Network^™

The Influence Of Defects: Oxidation Of Non-Planar Transition Metal Model Catalysts, Maxwell Gillum

Dissertations

Metal-catalyzed oxidation reactions are a major application of heterogeneous catalysis and are a widely applied synthetic route for the production of chemicals and reagents essential to modern society. However, as the intricacies of heterogeneous surface catalysis are slowly being unraveled, minute details of the catalytic environment have been revealed to play outsized roles in the catalytic activity of the surface. The experiments herein further investigate the interplay between surface geometry and the formation oxygen-induced surface structures. Understanding how defects influence surface reactivity is a necessary step in gaining the ability to accurately model heterogeneous catalytic environments. Two different aspects of …

Investigating Queer Asians' Accultrative Resilience And Wellbeing, Yiyu Cheng

Dissertations

This dissertation examines the role of resilience factors in moderating the effects of acculturative stress on the well-being of queer Asian Americans. A total of 181 survey responses were collected from queer-identified Asian Americans over the age of 18 residing in the United States. Using hierarchical multiple regression analysis, this study explores three models incorporating two identity resilience factors (ethnic identity salience and queer identity salience), two community resilience factors (ethnic community support and queer community support), and two intersectional resilience factors (queer Asian identity salience and queer Asian community support). Well-being was assessed through life satisfaction, negative affect, and …

“Buying Time Or Doing Harm?”: Tracing Contestation And Consensus In Debates On Puberty Blockers For Trans Youth, Dana R. Lavergne

Dissertations

The use of hormone blockers and other forms of gender affirming medical care for trans youth has emerged as a site of medical and political contestation, with 26 states passing legislation outlawing their use (Movement Advancement Project, 2024). Drawing from a multiple-methods approach, this dissertation examines the ways in which this contestation emerged and has been framed both in political case law and digital spaces, which a specific attunement toward how medical discourse is used to support arguments calling for either the allowance or ban of hormone blockers. This dissertation highlights the ways in which the families of trans youth …

Drawing The Curtain: A Grounded Theory Analysis Of The Conceptualizations Of Culture, Ethnicity And Race In Professional Training Materials For Child Life Certification, Kia Lee Ferrer

Dissertations

Objectives: Certified Child Life Specialists (CCLS) are pediatric healthcare professionals primarily working in hospital settings to support children and families in navigating the developmental challenges of hospitalization, illness, and enduring medical treatment. Recognizing the presence of racial and ethnic health disparities, coupled with the field’s notable lack of diversity (98% White female), the child life workforce is increasingly acknowledging the undeniable evidence that discriminatory behaviors adversely affect a child’s life and well-being. As advances in the social sciences increasingly reveal that discrimination functions as a "socially transmitted disease" in a child's life, I predict that the failure of child life …

Parental Autonomy Support And Children’S Affect As Predictors Of Children’S Stem Engagement In An Informal Educational Context, Bianca Martins Aldrich

Dissertations

In this project, we examined relations between parental talk and children’s affect on children’s STEM talk during an engineering-related activity (i.e., tinkering) in a local children’s museum. We characterized children’s affect in terms of valence (positive or negative) and activation (activating or deactivating), and parental talk was characterized as autonomy supportive or directive, as well as STEM-related or not. Parents and their 4- to 10-year-old children were recruited at the entrance of the Tinkering Lab exhibit at Chicago Children’s Museum. Parents and children were video and audio recorded during the activity. We coded parents’ and children’s behaviors using a time-sampling …

Forgive As We Are Forgiven: Reframing A Trinitarian Model Of Forgiveness In A Post-Genocide Rwanda, Deogratias Mbonyumugenzi

Dissertations

This dissertation seeks to develop a theological model of forgiveness rooted in a relational conception of the Trinity. The central argument of this dissertation is that the model of forgiveness practiced in post-genocide Rwanda and the forgiveness modeled by Jesus, and testified to in the New Testament and developed in the Christian tradition, are good, but not sufficient to address the kind of trauma and human disrepair, as well as the devastation of communities, inflicted by genocide. Rather, a theology of forgiveness modeled on a relational conception of the Trinity and its practical implications for a Trinitarian ecclesiology and anthropology …

Effectiveness Of A Classroom-Based Stress Awareness And Coping Skills Program Among Adolescents From Diverse Backgrounds, Adriane Van Zwoll

Dissertations

The ongoing youth mental health crisis in the United States, worsened by the COVID-19 pandemic, has highlighted the urgent need for accessible and effective school-based interventions. This dissertation evaluates the effectiveness of Stress Less: Resilience for Success™, a single-session, classroom-based stress awareness and coping skills program implemented by NAMI Metro Suburban in diverse middle and high schools in the western suburbs of Chicago from 2018 to 2024. Using the CDC’s Framework for Program Evaluation, this study analyzes secondary data from 7,225 pre-test and post-test surveys and is complemented by qualitative informational interviews with current and former NAMI staff and volunteers …

Appearance Over Function - The Impact Of Long-Term Oral Contraceptive Use On Brain Development, Breast Tissue Composition, And Future Lactation Outcomes, Fiona M. Wang

Dissertations

This integrative review examines the long-term effects of combined oral contraceptive (COC) use beginning in puberty on brain development, breast tissue composition, and future breastfeeding outcomes. Puberty is a critical developmental stage during which hormonal changes significantly impact the neurological and reproductive systems. The introduction of synthetic estrogen and progestin through COC use during this time may disrupt natural hormonal pathways, potentially altering neuroendocrine signaling and breast tissue maturation. Such changes may have lasting consequences, including impaired milk production, a weakened milk ejection reflex, disrupted maternal-infant bonding, and reduced overall breastfeeding success. The review synthesizes findings from endocrinology, neuroscience, and …

Challenges In Providing Equitable Education For Primary School Students With Learning Disabilities In Zimbabwe: Teachers’ Experiences., Joyce Madzinga

Dissertations

This study examines the challenges primary school teachers in Zimbabwe face when supporting students with learning disabilities (LDs). Many learners with LDs are excluded from adequate classroom support due to systemic, cultural, and resource limitations. Learning disabilities are often under-recognized as compared to other disabilities because they are invisible. Raising awareness and empowering educators are crucial steps toward addressing these hidden needs and ensuring they are recognized and met. Six teachers were interviewed using a qualitative ethnographic approach. Findings reveal obstacles, including insufficient training in special education, limited teaching resources, high pupil-teacher ratios, negative societal attitudes, and poverty-related constraints. Additional …

Robust Ai Solutions For Financial Markets Through Generative Modeling, Dynamic Graph Learning, And Reinforcement-Based Portfolio Optimization, Jingyi Gu

Dissertations

Financial markets are inherently uncertain and dynamic, driven by complex factors such as macroeconomic signals, investor sentiment, and evolving inter-asset relationships. While machine learning has advanced financial modeling, existing approaches often fall short in addressing the real-world intricacies of finance. This dissertation confronts two critical challenges, human-driven stochasticity and risk-intensive decision-making under real-world trading constraints, while seizing a pivotal opportunity, the structural dynamics of evolving financial systems. These elements are foundational to advancing robust and practical financial intelligence.

To this end, this dissertation develops a unified framework for robust financial modeling and decision-making. The framework is architected as a progressive, …

Large-Scale Graph Algorithms And Applications With An Emphasis On Fintech Data, Fuhuan Li

Dissertations

Graph algorithms are essential analytical tools with applications spanning cybersecurity, biology, social media, and increasingly, financial technology (FinTech). The complex and interconnected nature of financial data, particularly in cryptocurrency networks, presents unique opportunities for graph-based analysis in fraud detection and anomaly identification.

This dissertation presents the design and implementation of scalable graph algorithms tailored for large-scale networks, with particular emphasis on FinTech applications. The primary contributions include: (1) novel cover-edge based triangle counting algorithms that significantly reduce computational overhead through breadth-first search preprocessing, achieving substantial speedups over traditional methods and dramatic communication reduction in distributed settings, (2) optimized parallel implementations …

Bodipy-Based Photocages For The Controlled Release Of Hydrogen Sulfide And Persulfides, Yanmei Li

Dissertations

Reactive sulfur species (RSS) such as hydrogen sulfide (H2S) and hydropersulfides (RSSH) are crucial mediators in a variety of physiological and pathological processes. Their regulatory roles span from maintaining cellular redox balance to influencing signaling pathways critical for homeostasis and stress responses. This dissertation investigates H2S and RSSH as biologically important molecules and explores the development of boron-dipyrromethene (BODIPY)-based photocages for its controlled, light-triggered release. Given H2S and RSSH's critical role in redox regulation and cellular protection, achieving spatiotemporal control over its delivery is essential for both therapeutic and research applications. BODIPY scaffolds offer favorable photophysical properties, including visible-light activation …

Reduced Order Models Of Hydrodynamically Interacting Flapping Wings, Jose Pabon

Dissertations

Fish schools exhibit a collective behavior and self-organization that is mediated by hydrodynamic interactions between individual fish. However, the long-time evolution of hydrodynamically interacting collectives is challenging to investigate due to the persistent influence of long-lived vortical structures, and the high-resolution requirements of direct numerical simulation at large Reynolds numbers. Reduced-order models have therefore played an important role in theoretical investigations of collectives of swimming bodies. The main results detailed herein are several new reduced-order models of swimmers that self-propel by flapping, i.e., by executing a prescribed periodic rigid body motion. The models are extensions of a discrete-time dynamical system …

Optimizing Hip And Knee Assistance For Walking And Sit-To-Stand Transitions: An Intrinsic Muscle Mechanics Based Predictive Approach, Neethan Ratnakumar

Dissertations

As the global population ages, the demand for wearable assistive technologies continues to rise, driven by their potential to enhance mobility and independence in older adults. Effectively designed controllers for lower-limb exoskeletons to assist sit-to-stand (STS) and walking are crucial for delivering efficient, safe, and comfortable assistance during daily activities. Traditionally, controller optimization involves biomechanical modeling and user-specific customization. Musculoskeletal simulations play a central role in this process by providing insights into human-exoskeleton interaction dynamics, thereby informing and refining control strategies.

This work presents a simulation-driven approach for developing exoskeleton controllers for walking and STS using two distinct methods: optimal …

Development And Implementation Of Novel Mass Spectrometric Methods For Metabolism Studies In Drug Discoveries, Huifang Yao

Dissertations

The field of drug discovery has evolved significantly over the past few decades, with a growing emphasis on understanding the metabolic pathways and biotransformation processes that influence the pharmacokinetics and pharmacodynamics of drug candidates. Novel mass spectrometric methods have emerged as powerful tools in this domain, facilitating the comprehensive analysis of metabolic profiles and enabling the identification of metabolites with implications for safety, efficacy, and overall drug development. However, challenges remain in quantifying metabolic flux—an essential aspect of understanding drug action—particularly due to the limitations of traditional isotope kinetic assays, which often involve lengthy sample preparation and the use of …

Developing An Instrument To Measure Teacher Attitudes Toward Multilingual Pedagogies, Lauren H. Ramers

Dissertations

In an increasingly globalized world, substantial numbers of multilingual learners occupy K–12 and higher education spaces bringing diverse linguistic resources that, when intentionally and appropriately leveraged, can significantly enhance English language learning outcomes. Multilingual pedagogies, which honor and build upon students' full linguistic repertoires, are essential for fostering equitable and inclusive learning environments. This quantitative exploratory study investigated teachers' attitudes toward multilingual teaching with the goal of developing a reliable survey instrument—the Multilingual Pedagogy Scale (MPS)—to measure how teachers perceive language learning in multilingual classrooms and what they report doing in their classrooms.

First, a review of the research helped …

Comprehending Students' Experiences With A Language Learning Resource Center: A Descriptive Phenomenological Study Of College Life And Belonging, Paulina Dzieza

Dissertations

This study explores the impact of Language Learning Resource Center (LLRC) services on college students' overall college experience and their sense of belonging on campus. In the constantly evolving world of higher education, higher education institutions work to provide welcoming spaces where students can flourish academically and socially. In higher education, where there is a growing focus on student support services, the LLRC is essential for promoting academic achievement, cross-cultural interaction, and social integration for foreign language learners. This qualitative study, guided by a combined theoretical framework of Community of Practice and Ethics of Care, aims to advance knowledge of …

Joint Kinematics And Kinetics During Vertical Jump Landings With Progressively Increasing External Loads, Darcie L. Yount

Dissertations

This study examined sagittal and frontal plane kinematics and kinetics during countermovement jump (CMJ) landings performed with either a traditional barbell (BB) or a hexagonal bar (HEX) across increasing submaximal loads in recreationally active males. Generally, hip and knee flexion angles and joint mean angular velocities decreased as loads increased. Hip extension and knee flexion moments increased as load increased up to 20 kg, at which point these values decreased. Performing the CMJ with the HEX exhibited increased frontal plane stability compared with the BB group. Additionally, the BB group exhibited stiffer landing strategies, with decreased sagittal plane joint angles …

Applying Transcriptomics For Technology Development And Conservation In North American Marine Organisms, Cory Von Eiff

Dissertations

RNA biology is a rapidly expanding field, with many avenues of discovery among marine organisms. In this study, we analyze both mollusks and sawfish. First, we perform an evaluation of sRNA biogenesis pathways throughout Mollusca, with emphasis on the easter oyster, Crassostrea virginica. Understanding these molecules prescribes RNAi-based gene silencing approaches, benefiting genetic investigation and biotechnology. Similar to other animal groups, mollusks have conserved microRNAs (miRNAs), with some shared with ecdysozoans and deuterostomes; however, there is no evidence of an endogenous small interfering RNA (siRNA) pathway. These results suggest that long double-stranded RNA (dsRNA)-based RNAi is not appropriate for gene …

Population Dynamics Of Feral Hemp (Cannabis Sativa L.) Across Illinois, Bryan Scott Foster

Dissertations

Hemp (Cannabis sativa L.) is an historically cultivated species re-emerging in modern agriculture due to its utility as a fiber, grain, and cannabinoid crop. While industrial hemp refers to cultivated varieties bred for specific agronomic traits and legally defined by low tetrahydrocannabinol (THC) content, feral hemp, often called "ditch weed", represents escaped or naturalized populations descended from historical cultivation. These unmanaged populations persist and spread in disturbed habitats across North America, particularly in the Midwestern U.S., raising ecological and agronomic concerns due to their potential for genetic contamination, invasive behavior, and interactions with native species and agricultural systems. The overall …

Framing The Problem To Meet The Policy Solution: An Embedded Mixed Methods Case Study Of The 2017 Michigan Opioid Laws, Leandra Hawkins Burke

Dissertations

The opioid crisis presents a wicked problem for public administration. Hundreds of thousands of people have died from opioid overdoses in the United States, and countless others have experienced severe opioid-related physical, psychological, and socioeconomic harms. Countering the opioid crisis has been difficult due to interdependencies across different drugs and multiple pathways for abuse and dependence. Many scholars, health providers, and politicians have called for a broad public health approach to combat the opioid crisis, but the full expanse of what that would entail has not yet been realized. What has been demonstrated is that interactions targeting a single aspect …

Immune Modulation Affects Olfactory Glomerular Recovery In Zebrafish, Bonnie E. Ebendick

Dissertations

Adult zebrafish regenerate neurons throughout their lifetime and exhibit rapid recovery from neuronal damage with support from their immune system, making them an excellent model for studying neuroinflammation and brain repair mechanisms. When olfactory sensory neurons are lesioned, their cell death stimulates the immune system by activating microglia and other immune cells in the olfactory bulb, initiating tissue repair and neuronal replacement. This dissertation investigates how the immune system influences recovery from neuronal damage, testing the hypothesis that immune perturbation in zebrafish alters neural recovery.

To investigate the link between immune function and neuronal regeneration, zebrafish received a unilateral lesion …

Mechanistic And Evolutionary Insights Into A Group Of Nicotine And Hydroxynicotine Degrading Flavoenzymes, Zhiyao Zhang

Dissertations

Flavoprotein amine oxidases (FAOs) are key enzymes in various kinds of metabolic pathways, mediating redox reactions via flavin cofactors. While most FAOs function as oxidases that readily reduce oxygen to hydrogen peroxide, a few outliers of the FAO family act as dehydrogenases that suppress the reaction with oxygen. The molecular basis for this divergence in function remains poorly understood.

The work presented in this study investigates the fundamental mechanisms of how flavincontaining enzymes activate or suppress their reaction with different electron acceptors to achieve high turnover rates. The overall body of work is divided into three different sections that (1) …

The Development Of High Throughput Assays For Identification And Evaluation Of Small Molecule Modulators Of The Pri-Microrna-18a—Hnrnp A1 Interaction, Emile N. Van Meter

Dissertations

Therapeutics targeting RNA is a rapidly growing field. While only 1.5% of the human genome encodes genes for protein, over 70% o=f the human genome contains the genes for noncoding RNAs that regulate protein expression and function. Expanding the paradigm of small molecule drug discovery from traditional protein targets to include RNA would broaden the therapeutic landscape and provide new methods to modulate previously undruggable targets. miRNAs (miRs) have been found to be aberrantly expressed in many disease states, including neurodegenerative diseases and cancers making them promising therapeutic targets. The production of functional, mature miRs requires multiple proteins in a …

Gender Identity Development In Social Virtual Reality: A Phenomenology, John Michael Sullivan Iii

Dissertations

The purpose of this study was to examine the ways in which trans and gender-diverse individuals engage with social virtual reality (VR), what kinds of experiences they have on social VR platforms, and how their experiences translate into gender identity exploration, expression, and development. Inquiry was driven by two primary research questions: (a) What are the experiences of trans and gender diverse individuals in social VR platforms and (b) How do trans and gender diverse individuals use social VR to develop and to express their gender identities? This study utilized a qualitative and phenomenological methodology that was guided by a …

Emerging Adulthood, Identity Conflict, And Self-Compassion’S Impact On Mental Health Interference Of Collegiate Student-Athletes, Courtney Amber Shields

Dissertations

Prior research identified a strong connection between experiences of being a collegiate student-athlete with mental health-related struggles; however, little research has been conducted into how the competing identities of student and athlete within a heavy identity developmental period (emerging adulthood) might be impacting mental-health interference. The purpose of this quantitative study was to understand how emerging adulthood, student identity, athletic identity, and the conflicting role of student-athlete identity had in mental health interference on training, competition, and willingness to see a sports psychologist within collegiate student-athletes as well as how self-compassion moderated these relationships. The following research questions guided this …

Supporting Cultural Capital In Undergraduate Biology: Instructor Roles And Practices, Lydia Nicole Mayo

Dissertations

Undergraduate biology students must navigate complex academic environments that require more than content mastery alone. Increasing evidence shows that students’ attitudes, beliefs, and values—such as motivation, confidence, and a sense of belonging—are critical to student engagement, persistence, and success, especially among first-generation college students and those from historically marginalized backgrounds. Therefore, the purpose of this dissertation is to use cultural capital theory to explore how instructor practices in college biology classrooms support these non-content resources, framed as three forms of cultural capital: aspirational, navigational, and emotional capital for college biology.

To investigate this phenomenon, the dissertation integrates three complementary studies. …

Examining Associations Between Internalized Racism, Psychological Flexibility, And Well-Being Among Bipoc, Cerella Chandra

Dissertations

Internalized racism has been defined as the adoption of negative stereotypes related to one’s racial/ethnic group and associated with psychological distress. There is little research on the effectiveness of Acceptance and Commitment Therapy (ACT) on diverse populations, but recent intervention studies have indicated that psychological flexibility may counter the negative psychological effects of self-stigma. The purpose of this study was to examine the relationship between internalized racism, psychological flexibility, and psychological distress and life satisfaction among Black, Indigenous, and People of Color (BIPOC). Self-report data was collected using Qualtrics with prospective participants recruited from a large public university in the …

Predictors Of Cyberbullying And Help-Seeking Behaviors In Rural Midwestern Schools: A Multilevel Modeling Analysis, Ashley M. Harrison-Pavlik

Dissertations

Cyberbullying is a significant problem throughout the United States. Many risk factors have been identified for cyberbullying victimization, including experiencing traditional bullying victimization, social media usage, gender, and underrepresented racial/ethnic status, although the results are inconclusive. In response to cyberbullying, youth may choose to engage in or avoid help-seeking behaviors. Individual characteristics such as age, gender, frequency of victimization, race and ethnicity, and student perceptions of school staff can influence whether a youth seeks help. School level variables, including anti-bullying policies and teacher awareness and perceptions of cyberbullying may also impact help-seeking behaviors. However, few studies have empirically assessed their …

Too Big To Fail? Using Microsatellites To Examine The Population Genetics Of Flathead Catfish (Pylodictis Olivaris) In Missouri Impoundments, Aaron Krolow

Dissertations

Flathead Catfish (Pylodictis olivaris) is a popular sportfish managed for recreational and commercial uses. Currently, managers in Missouri have implemented various reservoir-specific bag and length limits for P. olivaris to create sustainable populations of quality-sized individuals available for anglers to capture. In conjunction with field studies to estimate growth rates and size/age distributions, I developed and scored 15 microsatellite markers to estimate the effective population (Ne) and population structure within 10 Missouri reservoirs. I assessed the power of the markers to get acceptably precise estimates of Ne using NEoGen assuming life-history parameters (e.g., age at maturity, longevity and fecundity) estimated …