Digital Commons Network^™

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 …

Experiences With Social Media Social Comparison In Women Ages 18-28: A Qualitative Study, Olivia Oakley Dr.

Dissertations

This qualitative study aimed to understand young women’s experience using social media and their reported mental health connections, such as self-esteem and comparison. As inferred in recent research, a wide range of social media content is being produced and consumed, from promoting the “thin ideal” to newer campaigns advocating for body positivity (Cohen et al., 2019, Grabe et al., 2008; Groesz et al., 2002). In a time where there is so much online content to consume, it is important to continue to evaluate the lived experiences of those using social media. This phenomenological qualitative research captured the lived experiences of …

Understanding Middle Managers In Community Colleges, Mason Salazar

Dissertations

This dissertation explores the lived workplace experiences of non academic middle managers at community colleges, a group often overlooked in higher education research. Using a phenomenological approach, this study draws on semi-structured interviews with eleven directors and managers to highlight how these professionals navigate their campus environments, operational demands, and student needs. Framed by Max Weber’s theory of bureaucracy, the findings underscore the dual roles middle managers play, as organizational lynchpins and leaders and as advocates for students, all while operating within constrained organizational structures. Key themes include varied levels of institutional knowledge, differential access to professional development, and constrained …

Cyclical Matters: Black Labor, Temporality, And The Incomplete Reconstructions Within African American Literature, Courtney Walton

Dissertations

This dissertation examines the role literature plays in understanding black life post-reconstruction and post-civil rights movement. Specifically, I explore the continuation of injustices and mistreatment for black workers, the role black labor plays during the first and second post-reconstructions, and how literature can be used in framing this discussion. The similarities between these periods help us to better understand the cycle of racist societal expectations and the challenges black workers face integrating into society, discriminatory mandates required of black workers, the unfair job market, and forced labor. These periods interact cyclically in that the second post-reconstruction models the first post-reconstruction. …

Give People Money: The Effect Of Perceived Inequality In Everyday Life And Previous Cash-Transfer Programs On Support For Universal Basic Income, David Thomas Igliozzi

Dissertations

Economic inequality is a global concern with many adverse consequences for people across class divides. These consequences vary in scope—from negative effects on individual’s physical, mental, and social health to large-scale economic shifts which result from climate change (Galbraith & Hale, 2008; Hiesh & Pugh, 1993; Kaplan et al., 1996; La Ferrara & Alesina, 2000; Solt, 2008; Vilhjalmsdottir et al., 2016; Wilkinson & Pickett, 2007). Policy solutions meant to address the negative effects of economic inequality include government redistribution of wealth. Universal Basic Income (UBI), a specific and actionable policy of government redistribution, is a promising method of economic inequality …

“The Wonderful Swiftness Of The Soul”: Mental Movement And Religious Ethics In Medieval English Literature, Abigail Palmisano

Dissertations

This dissertation analyzes conceptual metaphors of psychological motion and stability in medieval English religious literature. I trace how language itself structures cultural approaches to epistemology, spiritual knowing, and virtue. Chapter One examines Alfred’s translation of Neoplatonic metaphors of psychological movement in the OE translations of The Consolation of Philosophy and Augustine’s Soliloquies. I argue that the reconfiguration of these metaphors into images of stability reveals an epistemology centered on certainty. Chapter Two compares the omission of motive psychological metaphor in Cynewulf’s Juliana and Ælfric’s “St. Agatha and St. Lucy” in process of translation. While Cynewulf’s depiction of virtue through stability …

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 …

Examining The Impact Of Technology-Enhanced Peer Mentorship On First-Year University Students’ Mental Health And Academic Success, Maya Hareli

Dissertations

Poor mental health among first-year college students has been associated with a plethora of unfavorable outcomes including worsening mental health problems later in college as well as declines in academic performance, rates of college retention, and postgraduate employment and income potential. While demand for mental health services on college campuses is high, there are various barriers to accessing these services. Peer mentoring is a resource-efficient solution for curbing college student mental health and academic challenges; however, the effects of past mentoring programs are inconsistent. Additionally, technology-delivered interventions (TDIs) have been shown to yield positive outcomes for young adults along various …

“This Is The Job Now”: A Phenomenological Study Of Meaning Making In University Faculty Regarding Role Expectations In Response To Student Crises, Leslie Watland

Dissertations

In recent years, faculty members in higher education found themselves at the intersection of rising student mental health concerns and increasing institutional expectations regarding student support. While universities traditionally framed faculty as educators and researchers, faculty roles now require engagement in emotional labor and crisis management—often without corresponding training. This dissertation explores how instructors at one university navigate these expanding expectations, examining their self-understanding, institutional positioning, and the broader implications of compliance care work. Compliance care work is a term developed in this study to describe the bureaucratization of faculty involvement in student well-being. It is an institutionalized response to …

More Than Trauma: The Story Of Intergenerational Survival, Tiffany Fang

Dissertations

Parental trauma can have a profound effect on children. The process of passing along traumatic experiences, known as the intergenerational transmission of trauma (IGT) and the process of passing along adaptations to these adverse circumstances, known as the intergenerational transmission of resilience (IGR), have been explored in populations such as survivors of the Holocaust and war refugees (Danieli et al., 2017; Kellermann, 2001; Sangalang & Vang, 2017). This study sought to extend findings to Chinese American immigrant families, many of whom experienced trauma in the form of war, sociopolitical violence, and poverty in 20th-century China. Despite the presence of these …

Exploring General Education Teachers' Awareness Of Ableism In Elementary School, Hana Elizabeth Polachek

Dissertations

Ableism, or prejudice and discrimination on the basis of dis/ability is of growing interest to both practitioners and researchers (Branco et al., 2019; Friedman & Awsumb, 2019). In the United States, there are federal laws that protect public education as a fundamental right regardless of a student’s ability status. Prior researchers found that educators can hold biases with respect to a student’s disability label (Bassey et al., 2020; Donohue & Bornman, 2015; Freer, 2018; Gifford & Knott, 2016; Ko & Boswell, 2013; Lucas, et al., 2009; Nah & Tan, 2021; Pachiţa & Gherguţ, 2021; Röhm et al., 2022; Wüthrich & …

Evaluating The Active Learning Experience Of Prelicensure Nursing Students By Role And Level In Simulation, Delisa Flynn

Dissertations

As the complexity of healthcare continues to grow, it is essential that nursing graduates enter the workforce with strong clinical judgment, confidence, and practice readiness. Simulation is an active learning strategy that creates a realistic, hands-on experiences for learners. Despite its widespread use, the impact of simulation roles within a simulated experience (participant versus observer) on student engagement remains unclear, particularly across different levels of nursing education. This study investigated differences in active learning engagement among sophomore and senior prelicensure nursing students (N = 161) based on their assigned role in a high-fidelity simulation scenario. Grounded in Kolb’s Experiential Learning …

Adolescent Social Media Use And Complete Mental Health: Examining The Intersections Of Identity, Social-Emotional Skills, And Social Support, Reese Hyzer

Dissertations

Social media and technology use have become ubiquitous for today’s adolescents. With the rise in technology use, mental health disorder diagnoses have also increased. Despite the increase in concern for both adolescent social media use and mental health, many schools, parents, and youth service clinicians do not have the knowledge or resources to intervene effectively. The current study explores two research questions. The first is to evaluate the moderating effect of social-emotional skills and social support on the relationship between social media use and mental health through structural equation modeling (SEM). The second research question is to explore whether this …

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 …

Competency Alignment And Competency-Based Education In Higher Education: Institutional Perspectives From Illinois’ Early Childhood Workforce Initiatives, Erika Gustafson Dietz

Dissertations

Competency-based education (CBE) has gained attention as a model for expanding access to postsecondary education and aligning workforce preparation with industry needs. In Illinois, state-supported initiatives have sought to integrate competency alignment into professional development and higher education programs for the early childhood workforce. This mixed-methods study examines how postsecondary ECE programs in Illinois are implementing CBE, the extent to which competency alignment influences program design, and how institutional leaders and faculty perceive CBE adoption. Findings indicate that while state-supported initiatives have increased institutional engagement with competency alignment, CBE adoption remains partial and selective rather than fully transformative. Programs are …

Perverse Convergences: Aelred Of Rievaulx And The Queerness Of Waiting, Zaccary A. Haney

Dissertations

ABSTRACT Using Aelred of Rievaulx’s (1110-1167) treatise Spiritual Friendship and his fundamental insight, “God is friendship,” this dissertation seeks to understand how the divine arrives woven into the dynamics of human relationships. I bring together social media research, critical theories of language, queer phenomenology, queer temporalities, and liberation theologies into a cross-temporal erotic narrative between Aelred and me. The first part establishes the imaginative distemporal space of Sodom, based on a shared homosexual identity. It critiques historical and theological disciplines as familiarizing discourses that compel arrivals of the other through structures authentication and the social magic of professionalization. In the …

Special Education Disproportionality In Illinois: What Are We Doing?, Kaelyn Chanel Green

Dissertations

This mixed-methods study examined special education disproportionality in Illinois to determine current trends, root causes, and responses to significant disproportionality as reflected in Comprehensive Coordinated Early Intervening Services (CCEIS) plans. Quantitatively, repeated measures analyses of risk ratios over a five-year span revealed that although many districts had reduced overall risk ratios, racial and disability-based disparities persisted. Qualitatively, inductive content analysis of 32 CCEIS plans identified four primary root causes—deficiencies in Multi-Tiered Systems of Support (MTSS) and Response to Intervention (RTI), inadequate Social and Emotional Learning (SEL) supports, cultural and linguistic barriers, and vague or misaligned problem statements. Most action plans …

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 …

Philosophical Purification As Liberation And Transformation, Lachanda C. Davis

Dissertations

This study utilizes Plato’s conception of purification as a diagnostic tool to examine contemporary issues of police brutality and political violence. Within this context, I aim to treat the multiple tensions that arise with the question of living a good life. What does it mean to live and what does it mean to live a good life within constraints that magnify fear, anxiety, and despair? I argue that philosophical purification involves ‘aporia’ (perplexity; difficulty; confusion; loss; or puzzlement) in both a literal and generative sense. Moreover, the multiple aporias that arise cannot be reconciled by merely performing a religious rite …

The Development And Validation Of The Measure Of Critical Reflection, Yea Jin Chang

Dissertations

Critical reflection, a component of critical consciousness, is defined as a metacognitive ability that is engaged when identifying, critiquing, and transforming social oppression. This study developed and validated the Measure of Critical Reflection, with items that assess participants’ cognitive ability to critically reflect and are framed to be generalizable across time and social contexts. Items were generated through literature review and interviews with critical consciousness educators and data was collected across two samples for factor structure analysis (N = 300) and replication and validation (N = 286). Results confirmed that a unidimensional model was most appropriate to represent the data …

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 …

The Beloved Disciple In Performance, Eric Christian Zito

Dissertations

This project aims to reconsider the Fourth Gospel’s Beloved Disciple from the standpoint of biblical performance criticism, an approach that takes seriously the likelihood that most first-century audiences would have encountered the Fourth Gospel by means of performance rather than private reading. The dissertation considers: 1) what difference the medium makes in a first-century reception of John’s Gospel, and 2) how early audiences would have been shaped by the discipleship model portrayed by the unnamed Beloved Disciple in a performance setting. Against the current of mainstream scholarship, I argue that the Beloved Disciple is a developing character who epitomizes Johannine …

Fear Of Victimization, Trust, Security, And Public Spaces In Guatemala, Keyla Navarrete

Dissertations

This dissertation explores fear of victimization, personal encounters with crime, perceptions of institutional trust, support for informal justice practices, and avoidance of spaces in Guatemala. Institutional trust—understood as individuals’ confidence in the police, judiciary, and correctional systems, particularly their fairness and effectiveness—is vital for democratic governance and social stability. High levels of trust in legal institutions can foster civic engagement, reduce social fragmentation, and encourage public cooperation in crime prevention. In contrast, diminished trust may lead individuals to withdraw from formal systems of justice, limiting the state's capacity to function effectively. Utilizing nationally representative data from the National Survey of …

Youth And Parent Knowledge And Perceptions Of Spina Bifida: Associations With Neurocognitive Factors, Self-Management, And Quality Of Life, Olivia Emery Clark

Dissertations

Spina bifida (SB) is a common congenital birth defect with multiple and varied medical, physical, and psychological impacts. The objective of these studies is to examine youth and parent condition-related knowledge in the context of SB and associations with executive function, quality of life, and medical self-management. Collectively, these studies examine both qualitative and quantitative multi-informant data from youth with SB, their parents, and their teachers. The first study used growth analyses to examine changes in condition-related knowledge over time, predicted by executive dysfunction and inattention, and predictive of medical self-management skills. The second study used qualitative coding methods to …

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 …

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 …

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 …