Digital Commons Network^™

Enhancing Control Charting Schemes And Exploring New Assessment Metrics To Advance Quality Control And Cyber-Attack Detection In Manufacturing, Ahmad Al Majali

Dissertations

The increasing integration of digital technologies and industrial control systems in modern manufacturing has introduced new cybersecurity vulnerabilities within cyber–physical production environments. Malicious actors can exploit these vulnerabilities to induce subtle process deviations that degrade product quality while remaining undetected by conventional statistical monitoring tools. Such attacks can be deliberately engineered to manipulate process behavior through transient shifts that vary in magnitude, duration, and frequency. Despite extensive research on transient shifts caused by assignable causes in Statistical Process Control (SPC), limited attention has been given to intelligently designed cyber–physical attacks that exploit the structural characteristics and limitations of control charting …

Exploring Alternative Curriculum Implementation In Special Education Settings, Amber R. Wilson

Dissertations

The purpose of this qualitative case study was to understand teachers’ perceptions of implementing an alternative curriculum in their self-contained special education settings and grade levels, as well as their perceptions of the training and ongoing support provided for its implementation. This study used a case study research design. Findings revealed that the participants experienced several challenges related to training, ongoing support, and curriculum implementation, including issues aligning the alternative curriculum with state standards and assessments. This study is significant because alternative curriculum implementation is under-researched in the United States, and the international literature on this topic is limited.

Perceptions And Practices: A Qualitative Study Of Middle Grades Physical Science Teachers’ Knowledge And Use Of Formative Assessment, Michelle Morgan

Dissertations

Declining content mastery scores in middle grades physical science across the River Valley School District, as reflected in College and Career Ready Performance Index data, have raised concerns about instructional practices and the use of formative assessment. Although formative assessment is widely recognized as a high-impact practice, limited research has examined how middle school physical science teachers’ conceptual knowledge aligns with their instructional planning and classroom practices. The purpose of this qualitative multiple case study was to explore teachers’ knowledge of formative assessment and the relationship between their stated beliefs and instructional practices. Participants included five eighth-grade physical science teachers …

A Cross-Cultural Comparison Of Pre-Service Mathematics Teacher Preparation Approaches In Jamaica And Historical Black Colleges And Universities In The Southeast United States, Sandra Riley-Brown

Dissertations

This qualitative comparative case study embarked on an in-depth exploration and comparison of the approaches to pre-service mathematics teacher preparation programs (PMTPP) in Jamaica and Historically Black Colleges and Universities (HBCUs) in the Southeast United States (U.S.), employing a cross-cultural lens. The primary objective of the study was to identify and analyze the similarities and differences between the methodologies utilized in PMTPP across these two regions, with a specific focus on how HBCUs addressed the preparation of culturally responsive educators. The research took two distinct phases. The initial phase involved a thorough analysis of documents provided by the participants. This …

Behavior Of A Mildly Skewed Network Tied-Arch Bridge During Construction And Early Service Life, Harsha Amunugama

Dissertations

This dissertation work investigated the structural performance of the 2nd Avenue Bridge in Detroit, Michigan, the first skewed, unbraced network tied-arch bridge in the U.S. The 245-ft long, 96.5-ft wide bridge features an 18-degree skew. The bridge was constructed using accelerated bridge construction (ABC) techniques, including off-site fabrication at a bridge staging area (BSA) and installation via self-propelled modular transporters (SPMTs) and lateral launching, enabling the completion of construction with minimal disruptions to I-94 traffic and improved safety.

Given the unique structural configuration of the bridge, the use of innovative construction techniques, and differences observed in structural responses predicted by …

Transparency And Accessibility In State Transportation Performance Reporting: A Systematic Examination Of State Department Of Transportation Websites Under Map-21, Jack Alan Klee

Dissertations

In the United States, all 50 State Departments of Transportation (DOTs) rely on federal funding as a key revenue source for roadway preservation programs. The 2012 Moving Ahead for Progress in the 21st Century (MAP-21) Act introduced a performance-based framework for transportation policy, establishing seven national goal areas that require state DOTs to report performance outcomes. As MAP-21 reaches its ten-year milestone, this dissertation investigates the extent to which state DOTs demonstrate transparency and accessibility in reporting federally mandated performance management results. Despite the centrality of performance reporting to accountability and public trust, systematic evaluations of these dimensions remain limited …

Barriers To Climate Change And Sustainability Action: Nursing Education And Practice, Dawn Marie Smith

Dissertations

Climate change is one of the most pressing public health emergencies of our time and nurses can have a great impact in their current practice and in the education of future nurses (The Alliance of Nurses for Healthy Environments, n.d.; American Nurses Association, 2023; Health Care without Harm, 2025). Deaths due to rising temperatures, vector-borne illness, and food insecurity related to drought and extreme weather are on the rise (WHO, 2024). It has been estimated that globally over 250,000 additional deaths will be attributed to climate related effects between 2030 and 2050 (Watts et al., 2020; WHO, 2023).

A primary …

Convergence And Divergence Of Opinion About Treatment Of Binocular Vision Disorders Among Vision Care Professionals, Sonia Young

Dissertations

There are three distinct professions prominent in the field of pediatric vision care. They are ophthalmology, optometry and orthoptics. All professions are integral to the detection and treatment of pediatric binocular vision disorders. However, distinct schools of thought exist to describe the best approach to pediatric binocular vision disorders and their treatments. Literature often highlights two opposing schools of thought represented by the “medical” and “behavioral” approaches. While there is academic debate about the merits and pitfalls of either approach, there is a paucity of nuanced perspectives which more closely resemble the ways in which pediatric ocular clinicians approach diagnosis …

The Effects Of Fluency Building On Undergraduate Student Performance, Lauren B. Shibley

Dissertations

Online learning has become integral to higher education, with enrollment steadily increasing over the past decade and accelerating during the COVID-19 pandemic. Research highlights the importance of flexibility, learner autonomy, and self-regulated learning skills in this environment, with studies demonstrating that strategies such as mastery-based, self-paced instruction, fluency training, and timely feedback support student engagement and academic success. Early work adapting personalized instruction for online use (Pear & Crone-Todd, 1999) and subsequent studies on fluency practice (Quigley et al., 2018; Urbina et al., 2019) emphasize how these supports can improve concept retention. Despite these advances, more quantitative research is needed …

Making Sense Of The Faith-Based School’S Mission: An Instrumental Case Study Exploring How The School’S Espoused Mission Is Enacted, Richard Mingerink

Dissertations

What happens in the space between a school’s espoused mission and the enactment of that mission in the classroom? For faith-based schools—institutions whose very identity rests upon a religiously grounded purpose—this question is not merely technical but existential. While these schools publicly espouse missions centered on a religious faith, research consistently suggests that what is proclaimed on paper is not always what is practiced in classrooms. The persistent gap between espoused mission and enacted practice raises a critical question: how do educators actually make sense of their school’s religious mission, and how does that sensemaking shape what they do?

This …

Structure-Property Relationships In Epoxy/Amine-Derived Polyester Thermosets, Jeffrey Aguinaga

Dissertations

This dissertation relates to ester-containing aromatic epoxy monomers and thermosets formed via reaction of those monomers with either ester-containing or non-ester-containing amine comonomers.  Due to the wide array of potential reactants (many bioderivable) to form ester-containing epoxy monomers that are closely related in structure, fundamental study of structure-property relationships was highly practical for this platform of materials.

Though properties of aromatic epoxy thermosets of relatively high-crosslink density and network strand rigidity vary widely with chemical composition and architecture, relatively low fracture toughness and impact resistance due to lack of ductility are typical. Integration of ester functionality and aliphatic spacers/connectors for …

Workload As A Tipping Point: A Serial Mediation Model Examining The Roles Of Job Crafting And Workload On Work Engagement, Affective Commitment, And Turnover Intentions, Jessica E. Langston

Dissertations

Job crafting is one way in which employees can boost their performance and satisfaction, and organizations can reap the benefits of high performance. Job crafting refers to an employee’s ability to proactively redesign a job to foster their satisfaction, engagement, and resilience toward work (Wrzesniewski & Dutton, 2001). After twenty-five years of study, the positive impacts of job crafting are well-established (Bhagat & Arora, 2021; Bruning & Campion, 2018; Wong et al., 2017; Wrzesniewski & Dutton, 2001). Recently scholars have noted the potential downsides and have called for more research into the nuances of job crafting when explored through the …

Exploring The Effects Of Polymer-Graphene Interactions On Bulk Composite Properties Using Finite Element Analysis, Bryant Grove

Dissertations

As a filler in high performance materials, graphene significantly enhances the mechanical properties of polymer composites. Experimental characterization of graphene composite enhancements is limited by labor-intensive processes in both synthesizing composites for different purposes and in characterizing the interactions between graphene and polymer composites that lead to these enhancements. Computational approaches such as finite element analysis (FEA) are suitable alternatives that go beyond experimental analysis. This dissertation demonstrates the utility of FEA in analyzing polymer graphene composites with an emphasis on modeling the interaction between graphene fillers and the matrix within the interphase formed between them. The accessible design framework …

Exploring The Lived Experiences Of Second-Career Educators, Kyle Avink

Dissertations

School districts across the United States face a persistent teacher shortage driven by high attrition rates, declining enrollment in teacher preparation programs, and increasing demands on educators (Carver-Thomas & Darling-Hammond, 2017). Teacher attrition is especially high within the first three to five years, with nearly 40-50% of new teachers exiting within their first five years (Carver-Thomas & Darling-Hammond, 2017; Cells et al., 2023; Gray et al., 2015; Ingersoll et al., 2025). In response, many states have expanded alternative certification pathways that allow professionals from other fields to enter teaching, making second-career educators a potential solution to workforce challenges (Afacan, 2022; …

An Assessment Of The Deep And Coastal Responses To Hurricane Passage In The Gulf Of Mexico, Using Complementary Observational Records And Model Simulations, Senam Kofi Tsei

Dissertations

In this dissertation, I examine and discuss different ocean features and ocean processes essential to the intensification of tropical cyclones in the Gulf of Mexico, drawing on observations, theory, and numerical model analyses across both the deep ocean and continental shelf-regimes. In the deep ocean, I integrate in situ measurements, theoretical framework, a 1D shear driven mixed layer model, and a high resolution model outputs to evaluate how salinity-driven stratification, Loop Current warm core eddies, pre-existing warm mixed layer temperatures, and the governing mechanisms mixed layer adjustment shape the upper ocean response before, during, and after storm passage. In the …

Host Families’ Perspectives Of The Impact Of The Commodification Of Education On The Student-Host Family Relationship In Study Abroad, Guadalupe Bustamante

Dissertations

The growing commodification of education has reshaped study abroad in ways that extend beyond marketing and program design. While homestays have traditionally been viewed as the ideal format for cultural immersion and language acquisition, research has largely overlooked how these trends affect the student-host family relationship from the family's perspective.

This study examines whether, and, if so, how Spanish host families perceive their roles and relationships with the American students they host have been impacted by these trends. Using a qualitative exploratory case study design, the research focused on representatives from eight families in Madrid, who have hosted U.S. students …

Agents Of Agency: Identifying Teacher Traits And Trainings Associated With Promoting Student Agency, Clara Mateo

Dissertations

This study shifts the focus of mathematics teacher quality from the traditional metric of test scores to “student agency,” defined as a learner's capacity to access power, make decisions, and take ownership of their learning process. While the literature on student agency provides ample qualitative insights, it is largely composed of small-scale studies. This research addresses this gap by conducting a large-scale, nationwide quantitative analysis to identify teacher factors associated with the promotion of student agency. The central research question is: What teacher demographics, dispositions, and professional development experiences are associated with increased student agency?

This study used a cross-sectional …

Performing (For The) Guru: A Performance Studies Approach To The Study Of Cults, Todd M. Brown

Dissertations

This project approaches a long-term experience of living in a cult through a performance studies lens. Utilizing autoethnographic methods, it explores personal insights and observations from years within the inner-circle of a coercive religious environment under tyrannical leadership. A variety of systems and relationships are narrated and analyzed according to three categories: ritualization, deployability, and occupation. Ritualization explains how a body becomes imbued with the rhythms and mantras of a cultic milieu. Deployability describes how this body is put into action at the service of the leadership. Occupation, as a metaphor, illuminates how a cultic subject becomes filled with the …

Intelligent Surveillance For Weapon Threat Detection: Transformer-Based Detection And Segmentation Using Thermal And Rgb Imagery, Akhila Kambhatla

Dissertations

Proactive public-safety surveillance requires deep learning systems that can detect and segment weapons reliably under real-world conditions. This research develops and evaluates a progressive, multi-phase pipeline that moves (i) from RGB object detection to pixel-level semantic segmentation and (ii) from visible-spectrum cameras to thermal imagery to improve robustness under low-light, clutter, and occlusion. Early phases establish strong detection baselines using one-stage and two-stage detectors (YOLOv5 and Faster R-CNN) for multi-class weapon localization, followed by practical optimization through pruning and ensembling to reduce false positives and computational overhead while maintaining real-time feasibility. Building on the limitations of bounding-box localization, the methodology …

Lyapunov-Krasovskii Based Approach To Time-Delay Systems: Computational Efficiency And Feedback Control, Huan Phan

Dissertations

Time-delay systems arise naturally in many engineering applications due to sensing,actuation, communication, and computation delays. The presence of delays has a significant influence on system performance both positively and negatively. Although Lyapunov--Krasovskii functional (LKF) methods provide a systematic framework for stability analysis and controller synthesis, their implementation often suffers from high computational complexity, particularly for large-scale systems and systems involving multiple feedback channels. This dissertation addresses both computational efficiency and feedback control for linear time-delay systems.The first part of this dissertation develops a decomposition-based approach to reduce the computationalburden of stability analysis. By exploiting structured invariant subspaces associated with the …

Federated Neuromorphic Intelligence: Advancing Robustness, Efficiency, And Continual Adaptation In Edge Environments, Manh V. Nguyen

Dissertations

This dissertation investigates how spiking neural networks (SNNs) can improve federated edge intelligence by advancing three interconnected goals: communication efficiency, adversarial robustness, and continual adaptation. As edge computing deployments expand across Internet of Things (IoT), sensing, and privacy-sensitive applications, conventional federated learning approaches built around artificial neural networks (ANNs) face growing limitations in power consumption, bandwidth demand, and resilience to real-world uncertainty. SNNs offer an alternative computational paradigm based on event-driven, sparse, and temporally structured processing that is naturally suited to constrained edge environments. However, their behavior in practical federated settings remains insufficiently understood.

To address this gap, this dissertation …

Qualitative Phenomenography: Sustaining Motivations Of Black Women Principals In Pk-5 Title I Schools, Kahliah C. Rachel

Dissertations

Black women principals remain underrepresented in educational leadership, yet they are disproportionately assigned to PK-5 Title I schools, where complex academic, social, and political demands converge. Limited research examines what sustains these leaders over time, particularly in roles marked by intersecting oppressions of race and gender. Grounded in Black feminist thought and intersectionality, this qualitative phenomenographic study explored the sustaining motivations of six Black women who currently served or had served as principals in a PK-5 Title I school in Georgia. The purpose of this study was to describe the different ways these principals understood and experienced the internal and …

Exploring Teachers’ Lived Experiences: The Impact Of Wellness On Student Engagement And Behavior In Third-Grade Classrooms, Tiffany L. Jackson

Dissertations

This qualitative phenomenological study explored teachers' lived experiences implementing student wellness initiatives in the classroom and examined their views on how these initiatives affected student engagement and behavior. In this study, participants had the opportunity to express their views on implementing wellness practices in the classroom and on how these initiatives impacted student engagement and behavior. The research was guided by theoretical frameworks related to wellness, emotional and social intelligence, and relational perspectives. Semi-structured one-on-one interviews were the primary data source, and interview notes will serve as secondary data. This study addressed three research questions: (1) What are teachers' lived …

Perceptions And Beliefs Of A High School Geometry Professional Learning Community During Initial Implementation Of Standards-Based Grading, Marcellyn E. Baker

Dissertations

Traditional grading systems in secondary schools often conflate behavior with achievement, obscure evidence of understanding, and constrain teachers’ ability to enact learning-centered beliefs. This qualitative case study examined how five experienced secondary mathematics teachers in a public high school geometry department experienced and interpreted a grassroots transition to standards-based grading (SBG) within collaborative professional learning communities (PLCs). Guided by a pragmatic and constructivist worldview, data were collected through semi-structured interviews, focus groups, field observations, and questionnaires and analyzed using iterative open and axial coding with cross-group pattern analysis. Findings indicated that SBG did not fundamentally alter teachers’ beliefs about learning; …

First-Year Seminar’S Influence On Thriving In First-Year Students, Chelsea Miller

Dissertations

First-year students struggle with attrition. Prevention of attrition has various interventions on such first-year seminars. Typically, these interventions use academic outcomes to measure effectiveness. Prior research supports that students enrolled in first-year seminar benefit academically from the intervention. However, these outcomes do not fully capture all the possible benefits of this intervention. This leaves room for research on other possible outcomes. Thriving as a construct incorporates both academic and social elements. Thriving is a possible outcome that could capture the benefits of first-year seminars. This study examined how much of the variance in thriving was explained by participation in first-year …

Enhancing Traffic Safety Through Ai-Driven, Privacy-Preserving, And Secure Impaired Driving Detection Systems, Razan Alsulieman

Dissertations

Drunk driving remains a major threat to road safety worldwide, contributing significantly to traffic injuries and fatalities each year. Traditional detection approaches are largely reactive and vehicle-centric, relying on in-vehicle sensors, breathalyzers, or post-incident enforcement. These methods often depend on driver cooperation, intrusive hardware installations, or limited monitoring environments, restricting their scalability and effectiveness in large transportation systems. At the same time, modern cities increasingly deploy roadside cameras, surveillance networks, and drone- based monitoring systems, creating new opportunities for proactive intoxication detection at the infrastructure level. However, leveraging such external monitoring introduces challenges related to secure data collection, reliable AI-based …

Assessing The Viability Of Cryptocurrency As A Payment Method: A Consumer Perspective, Aadavan Dharumaiyan

Dissertations

The problem addressed in this study was the limited mainstream adoption of cryptocurrencies for daily retail transactions despite continued technological advancement and increasing institutional interest. The purpose of this qualitative study, grounded in Husserlian descriptive phenomenology, was to explore the perceptual and behavioral factors influencing this adoption gap. Participants were recruited using snowball sampling, resulting in eight participants divided into two cohorts: active cryptocurrency payment users (Cohort 1, n = 2) and cryptocurrency holders who did not use cryptocurrencies for payments (Cohort 2, n = 6). Data were analyzed using the Moustakas phenomenological approach to identify patterns in participant experiences. …

Unpacking American Reception Of Glocalized Non-English Content In The Netflix Era, Sur Govindarajan

Dissertations

The swift growth of streaming services has revolutionized the worldwide distribution of media, making it possible for non-English and non-English-adjacent content to reach American consumers on a never-before-seen scale, which is sometimes perceived as an indication of increasing cultural tolerance. However, while a lot is known about what audiences see, far less is known about how they really understand and assess these stories. There is a fundamental vacuum in our understanding of audience reception as a lived, meaning-making process because previous research has mostly focused on consumption patterns. In order to close that gap, this study examines how American audiences …

Factors That Affect African American Representation In Cybersecurity Academic Programs In The United States, Damon Walker

Dissertations

The U.S. cybersecurity workforce continues to experience a critical talent shortage alongside persistent inequities in racial representation, particularly at the faculty level within higher education. This mixed-methods dissertation examines African American representation among faculty in cybersecurity academic programs designated by the National Centers of Academic Excellence in Cybersecurity (NCAE-C) and investigates the factors that influence recruitment, retention, and advancement. Grounded in a transformative research framework, the study integrates quantitative analysis of national institutional data with qualitative interviews to illuminate structural patterns and lived experiences shaping representation.

Quantitative findings revealed pronounced underrepresentation: African American faculty comprise 2.57% (130 of 5,051) of …

Active Listening And Reassurance In Text-Based Virtual Health Coaches, Ghulam Hussain

Dissertations

Conversational agents (CAs) have strong potential to support health and physical wellbeing through text-based coaching, but they remain limited in their ability to demonstrate supportive social behaviours that are important in human coaching interactions. In particular, relatively little is known about how Active Listening and Reassurance are perceived, modelled, and evaluated in text-based virtual healthcare coaching, or how such behaviours should be adapted to individual users.

This dissertation investigates how supportive interaction behaviours can enhance text based virtual health coaching, with an initial focus on Active Listening and Reassurance and a later theoretical emphasis on Active Listening. Across five unique …