Digital Commons Network^™

Balancergnn: Balancer Graph Neural Network For Imbalanced Datasets, Mallika Boyapati

Dissertations

Addressing imbalanced datasets is challenging due to machine learning models' inclination to learn the majority class. Graph construction plays a major role in determining how Graph Neural Networks (GNNs) perform on imbalanced datasets. In this research, we introduce the BalancerGNN framework to tackle highly imbalanced datasets, demonstrating its effectiveness in fraud detection as one of the case studies. This framework is designed to work for any binary node classification dataset with significant class imbalances. This research addresses the following questions: i) How effective are feature engineering techniques in the case of imbalanced datasets? ii) How do graph representation learning and …

Never Fear, Hope Is Here: A Quantitative Analysis Of Public Accountants’ Hope During Busy Season, Katelynn Hopson

Dissertations

Never Fear, Hope is Here: A Quantitative Analysis of Public Accountants’ Hope During Busy Season

Retention has been a serious and ongoing concern within public accounting for decades, but most of the turnover research within the context of public accounting has heavily focused on the antecedents of turnover intentions with a negative lens. The goal of this study was to take an initial step toward examining the effects of a positive psychological factor—hope—on retention within public accounting firms. Specifically, the study investigated whether a public accountant’s level of hope impacted their turnover intentions via their appraisal of stress surrounding busy …

Warriors And Guardians: Police Recruit Role Orientation And Heterogeneity, Robert Boxerman

Dissertations

American police have experienced an expansion of duties over the last century, and their function has become increasingly diverse. As a result, researchers have developed role orientation typologies to understand how officers view themselves, their attitudes toward their work, and their responsibilities. One such typology is the warrior/guardian framework, where warrior-oriented officers see themselves as crime-fighting soldiers in conflict with criminals, while guardian-oriented officers view themselves as protectors of the community and providers of broader public services. Despite its popularity, there is limited empirical evidence supporting this framework. Further, little research examines how police recruits differentially view their role as …

What Does It Mean To Be A Mentor? Perceptions Of Mentor Teachers In A Mentoring Program, Karen M. Powell

Dissertations

The purpose of this qualitative case study is to describe a district-wide, new teacher induction and mentoring program in one metropolitan public elementary school in Georgia. Based on the literature reviewed, there is a lack of research on the effects of mentoring programs in elementary schools, and specifically the effects of mentoring on the mentor teacher. Research questions are: (1) How do mentor teachers experience an induction and mentoring program? (2) What meaning do mentor teachers ascribe to their role in new teacher induction? Data was collected from four mentor teachers through a background survey and individual interviews during the …

Trauma-Informed Gatekeeping In Counselor Education And Supervision: An Interpretative Phenomenological Analysis, Leslie E. Davis

Dissertations

Gatekeeping is a challenging ethical and legal obligation for counselor educators and supervisors. Many counseling students demonstrate some sort of problem of professional competence in their counseling programs, and it is critical that counselor educators utilize gatekeeping practices to prevent gateslipping (Brown-Rice & Furr, 2016a; Gaubatz & Vera, 2002; Kimball et al, 2019). According to The Substance Abuse and Mental Health Services Administration (SAMHSA, 2023), there is an increasing need to address trauma as a critical element of providing effective mental health services. Trauma-informed care and trauma-informed principles began to appear in the mental health literature in 2001, and the …

Emotional Intelligence And Effective Leadership In Times Of Global Crisis: A Mixed-Methods Study Of Managers At Multilateral Development Institutions During The Covid-19 Pandemic, Bukola Ogunyemi

Dissertations

Purpose: The purpose of this mixed-methods study was to identify and describe the perceptions of managers at multilateral development institutions regarding the impact of emotional intelligence methods in their approaches to leading during the COVID-19 pandemic. A secondary purpose was to examine how the experiences of leading during the COVID-19 crisis influenced managers' understanding, development, and application of emotional intelligence skills as part of their leadership practices.

Methodology: This study employed a convergent parallel mixed-methods design to examine the role of emotional intelligence in crisis leadership at multilateral development institutions during the COVID-19 pandemic. Using Goleman's emotional intelligence framework as …

Together We Can! High School Algebra Plc Members’ Experiences On Implementing New Curriculum And Its Impact On Their Self-Efficacy, Chasity L. Hughes

Dissertations

When state or federal legislation adopts new standards, the workload falls on the teachers. Unfortunately, research has shown a decline in teachers’ preparedness due to the many changes in the standards for mathematics in Georgia in the last twenty years. Studies show that teachers have felt overwhelmed and stressed when implementing previous curriculum changes which have decreased the teachers’ self-efficacy levels. This calls for professional learning communities (PLCs) to provide improvement and sustainment in teachers’ self-efficacy in implementing the new curriculum. Little research has been done to describe the teachers’ experience with the recent change in Georgia's mathematics curriculum. There …

Preservice Teachers’ Experiences With Critical Self-Reflection As A Means For Identifying Resistances To Becoming Culturally Competent: A Phenomenological Study, Susan Elaine Huff

Dissertations

Preservice teacher programs have been charged with finding ways to make programming more multiculturally inclusive due to the student population in K-12 public schools across the United States becoming increasing racially, culturally, or ethnically more diverse each year. The majority of current educational research surrounding multicultural education, explores the limited diversity in teacher education programs, understanding the cultural competency of the current teachers, and investigating discrepancies within current classroom application. There is little research that considers how preservice teachers use critical self-reflection as a tool for working with diverse student populations during clinical work in their program. Therefore, the purpose …

Opening Access To Advanced Placement English, Tabitha J. Evans

Dissertations

The goal of this study was to examine the growth trend in enrollment into AP over Honors English courses in secondary students across six high schools in the same school district over the past eight years and to determine how that enrollment impacted exam performance. Both a student survey and district demographic and exam performance data was pulled across the six high schools for all AP English Language and Composition (AP Language) and AP English Literature and Composition (AP Literature) courses over the course of time under study. Descriptive statistics were used to analyze trends in enrollment growth, AP scores, …

Data-Driven Decision Making For Quality Control In Foundry Applications, Ronit Shetty

Dissertations

In the transformative landscape of Industry 4.0, advanced quality control in manufacturing demands innovative methods for processing and analyzing datasets. This dissertation presents a comprehensive study on leveraging high volume data and machine learning to enhance decision making in the foundry industry. The research explores three crucial challenges in the foundry industry: predicting surface roughness, monitoring refractory coating thicknesses, and comparing feature extraction techniques for surface quality classification. The findings underscore the transformative potential of integrating advanced feature engineering techniques and machine learning into manufacturing quality control.

The first of the three challenges introduces a framework that integrates digital images …

Resilient Learning For Anomaly Detection In Smart Living Systems, Sahar Abedzadeh

Dissertations

Cyber-Physical Systems (CPS) rely on anomaly-based detection methods to ensure the integrity and security of critical infrastructures such as smart grids, smart water metering systems, and advanced metering infrastructures (AMI). Anomaly detection methods are commonly used to identify deviations from normal system behavior by establishing learned profiles and thresholdbased distinctions between benign and anomalous events. However, conventional frameworks often fail to account for adversarial data poisoning attacks, unlabeled unsafe events, and environmental noise—factors that distort training data, degrade detection accuracy, and increase false alarms. This dissertation proposes a resilient learning framework that mitigates these biases by integrating quantile regression, M-estimation …

Techniques For Enabling Advanced Adas Features: Operation In Inclement Weather And Use Of Infrastructure Information, Parth Kadav

Dissertations

Modern vehicles have undergone a transformation with the widespread integration of Advanced Driver Assistance Systems (ADAS) technology becoming the new standard and are set to be mandated by the by the National Highway Traffic Safety Administration (NHTSA) for all passenger vehicles and light trucks. ADAS features have proven to prevent or mitigate crashes by either alerting or assisting the driver. ADAS typically utilizes a forward-facing camera, which comes standard in modern vehicles to provide limited automation features such as Lane Keeping Assist (LKA), and Lane Centering Assist (LCA) to improve driver safety. These systems rely on the assumption that vehicle …

Deadtime In The Vale Of Soul-Making: Hermeneutics, Humanization, And Higher Education In Prison, Dale Michael Brown

Dissertations

This body of work examines higher education with and for justice-involved people from a descriptive, theoretical, and empirical perspective—pulling together multiple disciplines and employing different methodologies from the humanities and social sciences. The investigation is written from a philosophical perspective via educational foundations and a social science perspective via qualitative research, including an examination of carceral higher education’s connections to teaching and experiential learning. This approach reflects the interdisciplinary nature of both the author’s degree program and the topic itself, which (as a field of academic inquiry) is part theoretical and part empirical (both qualitative and quantitative). The papers in …

The Ebony Edge: A Qualitative Exploration Of Math Success Among Black College Women, April Ruiz

Dissertations

Historically, women have been underrepresented as leaders in STEM. However, according to the National Science Foundation (2022), women accounted for a little more than half of the college-educated workforce and underrepresented minority women increased in broad science and engineering occupational categories. This promising upturn underscores the importance—if progress is to continue—of better understanding why some African American women succeed in and persist with their study of college mathematics.

This study aimed to explore the experiences of Black college women attending a predominantly White institution in the Midwest, to better understand what reasons Black college women ascribe to their success in …

An Elementary Review Of Multi-Tiered System Of Support, Zachary R. Ernst

Dissertations

This research aimed to review how a large unit school district can differentiate the Multi-Tiered Systems of Support (MTSS) framework specifically for the elementary level to increase the growth and achievement of all elementary students within the district. A deep dive into publicly available student achievement data for Parkside School District was completed as part of the research and data collection. Additionally, school and district staff were given an in-depth survey about different aspects of the MTSS framework in Parkside School District. All of this data was analyzed and interpreted. The results showed that there is a need for the …

Gender Differences In Perceived Organizational Support Among Veterans With Posttraumatic Stress Disorder, Elizabeth Gomez

Dissertations

Posttraumatic stress disorder (PTSD) is a well-studied issue within the U.S. military, with data showing military personnel face a higher risk of trauma than the civilian population. Many veterans and service members suffer from PTSD related to their military experiences (Renshaw, 2011). As research has largely focused on protective factors such as social and familial support, little attention has been given to organizational support (Meredith et al., 2011). Perceived organizational support (POS) refers to how individuals perceive the support they receive from their employers, with the military as the primary employer for veterans. This study was designed to explore whether …

Breaking Barriers: An Educator's Pursuit To Provide Equity In Student Achievement, Christina L. Korsun

Dissertations

There is a sense of urgency to address the widening achievement gaps among minority students, students with disabilities, and English-language learners. This makes immediate school action necessary to create a more equitable learning environment. Without strategic interventions, including improved teacher retention efforts, stronger student support systems, and effective leadership, these challenges will continue to hinder student success and overall school performance. The purpose of this project is to find solutions for schools to institute to narrow the achievement gap by ensuring all students receive the support needed to succeed. Schools can respond to the learning gap by promoting equitable learning …

Counseling In The Space Between: Counselor Perceptions Of Empathy And Therapeutic Alliance During Videoconferencing-Based Teleplay Therapy Sessions, Robert M. Lima Jr

Dissertations

Children and adolescents experienced a significant increase in mental health challenges during the COVID-19 pandemic (Czeisler et al., 2020; Hertz et al., 2022; Mpofu, 2023; Oberg et al., 2022; Wilkins et al., 2023). With health facilities closed for non-emergent patients, telemental health therapy offered the possibility of support for those experiencing mental health challenges (Chiauzzi et al., 2020; Cooke et al., 2020; Karimi et al., 2022; E. C. Lee et al., 2023; Racine et al., 2020). While numerous past studies conducted over several years confirmed the efficacy of telemental health counseling (e.g., Feijt et al., 2020; Gloff et al., 2015; …

The Role Of Affordable Housing In Enhancing Tenants' Economic Stability In Connecticut: A Focus On Income, Employment, And Housing Stability, Osaid Zubi

Dissertations

This study examined the role of affordable housing in promoting economic stability among low- and moderate-income households in Connecticut. Focusing on income security, employment opportunities, and housing retention, this research highlighted the significance of affordable housing as a means to alleviate financial strain, support job retention, and foster community resilience. Utilizing a phenomenological approach, the study gathered insights from tenants, policymakers, and developers through conducting interviews and a focus group. Connecticut was chosen as the study site due to its high cost of living and affordable housing shortage, exacerbated by its proximity to New York City. Findings underscore the economic …

An Investigation Into The Effectiveness Of High School Models Of Instruction In English Language Arts For Exceptional Education Standard Diploma Students, Lori A. Rath Minton

Dissertations

This study examined the effectiveness of high school instructional models in English Language Arts (ELA) for Exceptional Student Education (ESE) students pursuing a standard diploma. The purpose was to compare self-contained and inclusion models within the framework of the Individuals with Disabilities Education Act (IDEA), emphasizing Free and Appropriate Public Education (FAPE) and the Least Restrictive Environment (LRE). The research was conducted in a medium-sized rural district high school.

The overarching research question was: Based on student test scores, ESSA data, surveys, and interviews with content area teachers, ESE teachers, paraprofessionals, support facilitators, and administrators, how effective are self-contained and …

A Phenomenological Study Of School Staff Perceptions Of The Threat And Prevention Of School Violence, Rebecca Linton

Dissertations

My study addressed the issue of school safety and student mental health in schools in the United States. The purpose of this study was to identify the concerns staff members had about the system and procedures used to track students’ mental health and how staff and students are kept safe within the school environment. The overarching research question for my study was: What are the perceptions of school staff regarding school safety and the support students with mental health issues receive? I used a quantitative research method for my study, collecting data through surveys of teachers and administrators. The survey …

A Multiple Case Study Of Four-Year Public, Non-Flagship Universities: Meeting Common Institutional Goals Of Increased Enrollment And Academic Profile, Alicia Kornowa

Dissertations

For several reasons, the number of students seeking and enrolling in a postsecondary education has started to decline in the United States (U.S.) and the decrease is expected to intensify for the foreseeable future. This trend is cause for concern among higher education enrollment leaders, especially those who serve at institutions not among the most elite universities or without a national brand—the campuses researchers project will have the greatest difficulty maintaining enrollment levels. Using strategic enrollment management (SEM) as an example of general systems theory and systems thinking, this multiple case study explored how four public, four-year, non-flagship institutions increased …

Quadratic Stochastic Processes: Algebraic Structures And Their Applications, Taimun Saleh Qaisar

Dissertations

This research focuses on the algebraic structures of the Quadratic Stochastic Processes (𝑄𝑆𝑃𝑠). In this work, we first study 𝜉𝑎- Quadratic Stochastic Operators (𝑄𝑆𝑂𝑠) linked to the partition P3. We simultaneously discuss the dynamics of the obtained 𝑄𝑆𝑂𝑠. Moreover, algebraic structure of the associated genetic algebra is studied. Further, we build Quadratic Stochastic Processes (𝑄𝑆𝑃𝑠) using the given Markov processes. Consequently, we obtain an ordinary differential equation for the resultant Quadratic Stochastic Processes (𝑄𝑆𝑃𝑠). Besides, we apply the solution of this ordinary differential equation for the option pricing problem. Thereafter, we construct Quadratic Stochastic Processes (𝑄𝑆𝑃𝑠) in three-dimensional space by …

Therapeutic Role Of Bioactive Peptides Derived From Hemoglobin, Priya Antony Pereppadan

Dissertations

Bioactive peptides are peptide fragments derived from the proteolytic cleavage or maturation of functional proteins that have shown promising therapeutic potential in addressing major health challenges, including type 2 diabetes, hypertension, and pain management. Diabetes is characterized by high blood glucose levels due to insufficient insulin production or utilization. There are several therapeutic targets for managing diabetes, and one key target is dipeptidyl peptidase IV (DPP IV) due to its role in glucose metabolism. In hypertension, angiotensin-converting enzyme 1 (ACE1) is critical for regulating blood pressure by forming angiotensin II, and its inhibition represents an established treatment strategy. Additionally, the …

Measurement Of Groundwater And Contaminant Fluxes In Fractures Using A Combined System Of Passive Flux Meter And Multiport Sampler, Qasim Raza Khan

Dissertations

Groundwater and contaminant movement in fractured rock aquifers is highly variable. Its dependence on fracture apertures and orientation as well as fracture network interconnectivity is not well understood. This poses a challenge to the measurement of groundwater and contaminant fluxes, especially when using open-hole techniques, which significantly alter natural flow conditions by connecting different fractures along an open borehole or a well. Hence, downhole techniques to directly measure groundwater fluxes and map fractures' locations, orientations, and apertures are considered valuable tools. In this work, the use of Fractured Rock Passive Flux Meter (FRPFM) with invisible tracer and visible dye component …

Overcoming Motor Imagery Bci Illiteracy: Adaptive Decoding And Knowledge Transfer In Eeg-Based Brain-Computer Interfaces, Zaid Shuqfa

Dissertations

Brain–computer interfaces (BCIs), also known as brain–machine interfaces (BMIs), enable direct communication between the brain and external devices without the involvement of peripheral nerves or muscles. Among various BCI paradigms, motor imagery (MI)–based BCIs are particularly appealing due to their intuitive, cue-independent nature, allowing users to issue control commands at will. MI–BCIs hold substantial promise for improving the quality of life of individuals with motor impairments, as well as enhancing hands-free control for healthy users. However, their widespread adoption remains limited by challenges such as low signal-to-noise ratio, inter- and intra-subject variability, and the need for frequent calibration. These challenges …

Ready, Set, No: Why Not All Successful Dual Credit High School Graduates Matriculate To Postsecondary Education, Jessica Deckard Mann

Dissertations

Dual-credit programs that allow students to earn college credentials in high school have become commonplace in the United States. Early College High Schools (ECHSs) were specifically developed to support equitable access to these programs, targeting groups that are historically underpopulated in postsecondary education (PSE). ECHSs aim to close the achievement gap, increase the number of college credentials earned by high school students, better train the workforce, and improve the life-time earnings potential of a diverse population.

The purpose of this nonexperimental quantitative study was to gather data from graduates in one Midwestern state who earned a college credential in high …

Upper-Level Undergraduate Pre-Healthcare Students’ Journeys To Graduation And Health Professional Graduate Programs, Holly L. Sisson

Dissertations

Despite decades of research on undergraduate student retention and persistence, only a handful of researchers, such as Dumke et al. (2018) and Stull et al. (2021), have looked specifically at pre-health students preparing for graduate health professional programs and the complex challenges these students face while trying to achieve their goals. Very little research focused on upper-level undergraduate students pursuing graduate health professional programs, such as physical therapy, occupational therapy, physician assistant, or similar graduate health professional programs excluding medical school. To help fill this gap, my study focused on the experiences of pre-healthcare students as they navigated their undergraduate …

How New Mathematics Teachers Develop Teacher-Student Relational Pedagogy, Dustin Kinser

Dissertations

This study investigated the support structures implemented with new mathematics teachers to help them build relational pedagogy with their students to determine their effectiveness. The literature review examines topical research, gaps in literature and theoretical frameworks to justify the study. The case study investigated new math teachers and their processes of building positive teacher-student relationships using the support structures that they were taught on their way to becoming a teacher. Math teachers were interviewed to find any common themes across the study and find out what is truly working or not working so that the process can be improved. Another …

Roses And Concrete: Black Teachers' Roles And Challenges In Marginalized Communities, Alyse N. Barry

Dissertations

Black educators play a vital role in schools that serve marginalized communities, yet their stories are often overlooked in academic research. This phenomenological study explores how Black teachers interpret their roles and navigate challenges within these spaces. Using Interpretative Phenomenological Analysis (IPA), I centered the voices of ten Black educators to better understand the emotional, cultural, and professional layers of their experience.

Through in-depth interviews, participants described themselves as more than just instructors. They saw themselves as cultural connectors, advocates, and protectors for their students. Their presence helps affirm student identities and bridge cultural divides, but they also carry significant …