A Joint Mindfulness And Growth Mindset Intervention For Reducing Math Anxiety For Pre-Service Elementary Teachers, Evan Czysz

Dissertations

Pre-service elementary teachers (PSTs) have often exhibited high levels of math anxiety, which can negatively influence their confidence, learning, and future teaching in mathematical settings. The purpose of this phenomenological case study was to understand the influences an intervention focused on growth mindset and mindfulness-based practices has on preservice elementary school teachers’ perceptions of mathematics at a mid-sized university in the Rocky Mountain Region of the United States, and sought to answer the following questions: Q1 Does a joint mindfulness-based and growth mindset intervention impact pre-service teachers’ levels of math anxiety? Q2 What were pre-service elementary teachers’ experiences with a …

Exploring The Use Of Culturally And Linguistically Responsive Practices Within The Multi-Tiered System Of Support (Mtss) Framework When Supporting Students With Disabilities At A Dual Language Immersion School, Sylvia Simmons

Dissertations

The integration of culturally and linguistically responsive practices (CLRP) within the Multi-Tiered System of Support (MTSS) framework has been recognized as a promising method for improving learning opportunities for diverse students. However, little to no research has been conducted on the intersection of CLRP within the MTSS framework to support students with disabilities in dual language immersion schools (DLI). This lack of research has posed challenges for educators seeking effective strategies to support diverse learners with disabilities in such settings. Therefore, the purposes of this qualitative case study were to (a) explore how a dual language immersion school utilizes the …

Student Engagement In High School Mathematics Blended Learning Classrooms, Therese A. Rinehart

Dissertations

Engagement is a student’s interest, participation, and motivation in the learning process and is a cornerstone of success in the classroom. The COVID-19 Pandemic overturned the traditional classroom, making the task of fostering engagement nearly impossible. Although pandemic-related research has largely focused on mental health and academic achievement, less attention has been given to instructional models promoting engagement in remote learning environments. Self-directed learning (SDL) is one model offering students digital autonomy and access to teachers and peers. This study examined the longitudinal data of student perceptions of their engagement through the COVID-19 Pandemic at an alternative high school and …

Using The Time We Have: Exploring Collaborative Instructional Planning For 8th Grade Georgia Studies In A Title I School, Bambara Timmerman

Dissertations

Teacher collaboration in middle schools is often emphasized in educational research and policy, yet content-specific collaboration, specifically for Georgia Studies (GAS), remains underexplored. This participatory qualitative case study explored how middle school GAS teachers perceive the influence of collaborative planning on their self-efficacy, the obstacles they face when attempting to collaborate, and what they perceive would foster a culture that supports ongoing collaborative planning. Grounded in constructivist theory, including social learning theory, situated learning, and social constructivism, this study focused on teachers in a rural Title I middle school. Data collection included demographic questionnaires, interviews, observations, document analysis, and researcher …

Teacher Leadership And Specially Designed Instruction: A Phenomenological Study Of The Lived Experiences Of Teacher Leaders And Special Education Teachers In Elementary Settings, Tangie M. Rahming

Dissertations

This qualitative phenomenological study examined the lived experiences of teacher leaders and special education teachers as they implemented Specially Designed Instruction (SDI) in elementary school settings. Despite SDI being a federally mandated component of the Individuals with Disabilities Education Act (IDEA), research consistently shows wide variation in how teachers interpret, deliver, and sustain SDI in real classrooms. Limited professional development, inconsistent coaching structures, and varying understandings of SDI across schools contribute to persistent gaps in implementation fidelity. To address these challenges, this study explored how teacher leaders support SDI implementation and how special education teachers make meaning of their instructional …

Culturally Relevant Pedagogy In Teaching And Learning In High School Social Studies Curricula In Georgia: A Case Study, Sharon Ann Mcmeans-Lukiri

Dissertations

Despite increasing diversity within Georgia’s high school student population, it remains unclear to what extent social studies teachers incorporate Culturally Relevant Pedagogy (CRP) in the planning and implementation of their instruction. Recent research indicates that many educators continue to struggle with developing effective instructional practices that meet the learning needs of students from vulnerable communities (Liasidou & Symeou, 2018). Students from these communities often experience lower academic achievement (Ladson-Billings, 2009), and when the curriculum fails to reflect or respond to their cultural backgrounds, they are more likely to disengage from school (Ladson-Billings, 2009). This gap between students’ cultural needs and …

A Phenomenographical Study Of Rural Teacher Retention Before, During, And After The Covid-10 Global Pandemic, Stacey Lb Collins

Dissertations

ABSTRACT

This phenomenographical study investigated rural teachers’ perceptions regarding their decisions to remain teaching in rural areas, with attention to experiences before, during, and after the COVID-19 global pandemic. The research was guided by two questions: (1) What experiences do rural teachers perceive impact their decision to remain teaching in rural school systems before, during, and after the COVID-19 global pandemic? and (2) How do rural teachers perceive the role of school administrators in retaining teachers in rural systems, before, during, and after the COVID-19 global pandemic? Participants were teachers who served in rural districts prior to, during, and after …

Civics Teachers’ Perceptions Of Disciplinary Literacy Strategies That Use Primary Sources: A Case Study, Whitney Williams

Dissertations

This study has been designed as a case study to examine teachers’ perceptions of document-based strategies when combined with primary sources as pedagogical tools. The participants were ninth grade civics teachers. Semi-structured interviews, focused observations, and artifact collection were the sources of collected data. As the researcher, my constructivism guided this study through the lens of Albert Bandura’s social cognitive theory (SCT). Therefore, the participants’ perception will be interpreted through SCT concepts such as personal influences, behavioral influences, and environmental influences. Findings show a handful of disciplinary literacy strategies that occurred most often across all participants. Teachers valued an emphasis …

The Interplay Between Structure And Teacher Agency In The Detracking Of Algebra 1: A Qualitative Case Study, Kristine Norris

Dissertations

This single qualitative case study examined how detracking Algebra 1 at Mountainview High School (pseudonym) restructured the course’s rules and resources and how teachers exercised agency in response. Guided by Giddens’ structuration theory and Weis and Fine’s critical bifocality, the study explored how institutional structures both shape and are reshaped by teacher action within broader systems of inequality. Participants were seven Algebra 1 teachers involved in the first two years of detracking. Data was gathered using semi-structured interviews and analysis focused on two research questions: (1) In what ways did detracking alter the structures of Algebra 1 courses, and (2) …

Teaching For Global Ecological Citizenship: A Case Study Of Rural Teachers’ Experiences And Practices, Sarah L. Tennyson

Dissertations

The purpose of this qualitative case study is to examine the experiences and practices of rural educators incorporating global ecological citizenship education into the social studies classroom. The systematic themes of social studies education in the past must evolve with the diversity of the classroom. Traditional themes taught must become more globally relevant, including ecological citizenship, the responsibility of citizens to sustain and participate in global ecological issues. One on one interviews with four rural Georgia educators along with artifacts they provided were examined for themes related to two research questions. How do rural educators adapt their instructional strategies to …

Breaking Barriers For Student Success: Leading In Challenging Times, Lisa Marie Dewey

Dissertations

This study explores how Diversity, Equity, and Inclusion (DEI) directors in one Midwestern state understand and lead equity initiatives in K–12 public education. The purpose of the study was to examine how DEI leaders make sense of their roles and the challenges of sustaining equity work within complex and often politicized systems. Using a basic qualitative methodology, the research examined how personal identity, sociopolitical context, and organizational structures shape DEI leadership. Critical Race Theory (CRT) framed the study, centering race, power, and systemic inequity in participants’ experiences.

Seven DEI directors participated in semi-structured interviews. Three key themes emerged. First, participants’ …

Effects Of Commission Errors During Prompting On Skill Acquisition And Maintenance, Molly K. Mutchler

Dissertations

Procedural fidelity refers to the extent to which procedures are implemented as intended. Engaging in procedural fidelity errors can lead to detrimental outcomes during skill acquisition and maintenance. The purpose of this study was to parametrically evaluate and compare two commission errors during prompting procedures using an arbitrary tacting task taught to college-aged students. Participants learned to tact four sets of arbitrary pictures and names. Prompting errors consisted of either providing the correct letters for a name in an incorrect order (i.e., an error within a component of the name) or providing the correct name for another picture (i.e., an …

An Investigation Of Paleoclimate Through A Sedimentological Lens In The Gulf Of Mexico And Western North Pacific, Sarah Monica

Dissertations

This dissertation explores the use of sediment cores as proxy data for the reconstruction of paleoclimatic and environmental conditions. Human-caused climate change is leading to dramatic shifts in the global climate. As the instrumental record of climate is relatively short compared to the amount of time Earth has experienced weather, this work aims to extend our knowledge of climate beyond the instrumental record, thereby improving our holistic understanding of the climate system. In Chapter one, sediment cores from the central Texas inner shelf are used to produce a record of intense tropical cyclone (TC) activity over a ~4500-year period. X-Ray …

Molecular Design And Engineering Of Luminophores For Aggregation Induced Electrogenerated Chemiluminescence, Jesy Alka Motchaalangaram

Dissertations

Most conventional luminophores produce intense emissions in solutions but suffer from weak emissions or quenching when aggregated in poor solvents due to intermolecular interactions, such as π-π stacking. This phenomenon is known as aggregation caused by quenching (ACQ), limits their applications in their solid state. In contrast, aggregation induced emission (AIE) is a phenomenon in which luminophores are weak- or non-emissive in solution but emit intensively in their aggregated or solid states. AIE has enabled significant advancements in various real-world applications and has inspired new areas of research. The combination of AIE with electrogenerated chemiluminescence (ECL) has resulted in a …

The Impact Of Teachers' Mathematics Qualifications On Student Proficiency, Riaz H. Zaidi

Dissertations

Schools across the United States face persistent challenges in strengthening mathematics and science education. The present study investigates the relationship between mathematics teachers’ qualifications and their students’ performance on standardized assessments, using data from a Midwestern urban school district’s ACT mathematics scores. Findings are discussed within the broader context of Science, Technology, Engineering, and Mathematics (STEM) education and national efforts to enhance competitiveness among industrialized nations. Despite the presence of leading universities and colleges, U.S. students continue to rank near the middle internationally in math and science achievement, according to the Pew Research Center. Contributing factors include disparities in teacher …

Problems In Extremal Graph Theory And Spectral Graph Theory, Fareeha Jamal

Dissertations

Spectral graph theory is a subfield of algebraic graph theory that studies the matrices associated with graphs. It lives at the nexus of Linear Algebra and Combinatorics. Many intriguing results in the domains of Matrix Theory and Combinatorics have come from studying the eigenvalues of graph matrices; in fact, several open problems in both areas have been resolved. Beyond its theoretical appeal, spectral graph theory has found meaningful applications in theoretical chemistry, particularly in the mathematical classification of chemical graphs. These classifications underpin quantitative structure–property relationships (QSPRs), facilitating the prediction of physicochemical properties such as enthalpy of vaporization, molar refractivity, …

Virtual Reality In Esl Teaching And Learning In A Hybrid Learning Environment In The United Arab Emirates, Basma Abdulla Abri

Dissertations

This study examines the impact of Virtual Reality (VR) on the oral proficiency of EFL learners in the UAE context, with exploring the instructors and students’ perspectives on using VR as a language learning tool. The study involved 44 Emirati higher education students enrolled in an English Communications Program divided into a control group using traditional methods, and an experimental group using VR tools for communicative activities. Data collection employed mixed-methods research through questionnaire surveys involving college students and interviews with EFL instructors over a ten-week period. According to the findings, the experimental group demonstrated higher oral proficiency than the …

Trustworthy Federated Learning Framework For Secure, Efficient, And Quality-Aware Distributed Ai, Asadullah Tariq

Dissertations

Federated Learning (FL) emerged as a significant advancement in the field of Artificial Intelligence (AI), enabling collaborative model training across distributed devices while maintaining data privacy. As the importance of FL and its application in various areas increased, addressing trustworthiness issues in its various aspects became crucial. In the FL process, clients contribute updates computed on their local datasets, which the server aggregates to iteratively refine the global model. However, not all client data may be relevant to the learning objective, and incorporating updates from irrelevant data can harm the model's performance. The selection of training samples significantly impacts model …

Jet Impingement And Vortex/Swirl Cooling Of Different Inlet And Outlet Geometrical Configurations For Turbine Blade Leading Edge Cooling, Irfan Ahmad Sheikh

Dissertations

Gas turbine blades operate in extreme environments, exposed directly to high-temperature combustion gases that cause severe thermal stresses, weaken material integrity, and may lead to structural failure. Proper cooling is crucial to lower blade temperatures, reduce thermal stresses, prevent failure, and improve overall engine efficiency. This work presents a detailed numerical study of various cooling configurations by applying two advanced leading-edge cooling methods, jet impingement and swirl cooling, across different inlet mass flow rates and jet Reynolds numbers (Rej) ranging from 1,000 to 20,000 to evaluate their cooling performance.

Several advanced leading-edge cooling configurations are proposed and compared with the …

Ai-Enabled Multi-Layer Security Operations: A Combined Siem, Ids, And Threat Intelligence Model For Adaptive Cyber Defense, Mohamad Khayat

Dissertations

This dissertation presents a comprehensive framework for the evolution of Security Operation Centers (SOCs) through the integration of advanced artificial intelligence (AI), blockchain, and optimization techniques. Motivated by the increasing complexity of cyber threats and the limitations of traditional reactive SOC strategies, this work begins with a systematic literature review that identifies critical gaps in current SOC operations. Based on these insights, a reference architecture is proposed to guide the integration of intelligent components into SOC environments. To address the challenge of secure and trustworthy information sharing, a blockchain-based threat intelligence platform is developed, leveraging Byzantine Fault Tolerance and Zero-Knowledge …

The Social Aesthetics Of Recognition, Italo Alves

Dissertations

The history of social philosophy is a history of suspicion toward the aesthetic (1). However, since we apprehend social reality fundamentally through its aesthetic appearances, an account is needed of how “the aesthetic” must enter the social-philosophical discourse, particularly in reconstructive models of social critique. I call this account “social aesthetics.” Social aesthetics illuminates how certain social experiences generate normative claims even in the lack of discursive articulation. (2) I argue that the philosophy of recognition, concerned with this relationship between social experience and normative claim-making, contains an unacknowledged aesthetic dimension, which I uncover through a critical reading of Axel …

The Effects Of Targeted Interventions On Student Engagement With Feedback: A Meta-Analysis, Andy A. Accettola

Dissertations

ABSTRACT This meta-analysis examines the effects of classroom interventions aimed at enhancing student engagement with feedback in K–12 and higher education settings. Drawing on the framework developed by Winstone et al. (2017), interventions were categorized into four major feedback engagement categories and 14 subcomponents. A systematic review identified eligible experimental studies published between 2014 and 2023, each reporting outcomes relevant to student feedback engagement. Effect sizes were calculated using standardized mean differences, and subgroup analyses explored the relative influence of intervention categories, subcomponents, and moderators. Findings from this meta-analysis indicate that targeted interventions to enhance student engagement with feedback generally …

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 …

How School Psychologists Narrow The Socioeconomic Opportunity Gap: The Practices And Beliefs Of School Psychologists In High-Performing, High-Poverty Schools, Nora Durgin

Dissertations

The purpose of this study is to examine the practices and beliefs of school psychologists working in high-performing, high-poverty (HP/HP) schools in order to make recommendations for how their practices can be replicated in other high-poverty schools to help narrow the socioeconomic opportunity gap. Results indicate that school psychologists engage in the major professional activities of school psychology practice to a similar degree as is documented in the existing literature. Despite relatively lower levels of engagement in delivering mental and behavioral health services, school psychologists view the practice to be highly impactful on students’ academic achievement. The school-wide activities commonly …

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 …

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 …

The Global Phase Space Of The Three-Vortex Interaction System And Its Application To Vortex-Dipole Scattering, Atul Anurag

Dissertations

This dissertation presents a global reduction of the classical three-vortex problem that is free from coordinate singularities, enabling a comprehensive analysis of the system's dynamics across all circulation regimes.

To achieve this, a two-step symplectic reduction procedure is developed. The first step introduces Jacobi coordinates adapted to the symplectic structure of the vortex system, and the second applies a Lie-Poisson reduction to the resulting system. This formulation eliminates the non-physical singularities associated with collinear vortex configurations and facilitates a global phase space analysis, including a detailed and novel investigation of bifurcations.

Within this reduced framework, all relative fixed points are …

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 …