Digital Commons Network^™

Lateral Habenula And Dorsal Raphe Neurons Signal Value Computations In Multi-Attribute Decision-Making, Yang-Yang Feng

McKelvey School of Engineering Graduate Student Theses & Dissertations

Decision-making is a fundamental part of adaptive behavior and can be compromised in psychiatric illness. Humans and animals are continuously presented with objects and opportunities as options to decide between. One challenge is that these options may independently vary along multiple dimensions or attributes that we care about. This can include attributes of physical reward, such as amount, delay, or uncertainty. When these attributes are present, the possibility of an abstract, cognitive reward, advance information to resolve uncertainty, may also motivate our decisions. It is unclear how the brain makes these subjective decisions, trading off between these multiple attributes based …

Acquired Von Willebrand Syndrome From Pathological Cardiovascular Flow, Alice Liu

McKelvey School of Engineering Graduate Student Theses & Dissertations

Acquired von Willebrand syndrome (AVWS) is a bleeding disorder characterized by the loss of high molecular weight von Willebrand factor (VWF) multimers. It is often associated with a wide range of underlying diseases, including individuals who receive mechanical circulatory support (MCS) and myeloproliferative neoplasm (MPN) patients, yet the mechanical mechanisms remain incompletely understood. In circulation, VWF undergoes force-dependent conformational changes that regulate its susceptibility to cleavage by the metalloprotease ADAMTS13. While elevated shear has long been believed to the main cause, pathological VWF cleavage cannot always be explained by shear alone, suggesting more factors are at play. The goal of …

Functional And Spatially Specialized Inhibition And Neuromodulation During Learning In The Hippocampus, Gerardo Enrique Molina

McKelvey School of Engineering Graduate Student Theses & Dissertations

The hippocampus relies on a diverse network of regulatory components for memory formation. Neuromodulators and inhibitory interneurons act in concert with excitatory neurons to control learning. Even within one of these components there is a vast diversity of genetic or chemical composition that may come from unique sources at uniquely timed intervals or events. The goal of this dissertation is to identify specific functional-behavioral attributes of two such examples: parvalbumin (PV)-expressing interneurons and the neuromodulator dopamine, in hippocampal CA1. In separate experiments, I used two-photon microscopy of the calcium sensor, GCaMP, which measures neuronal activity, and GRAB-DA, which reports levels …

Assessing Hyperlocal And Local Air Quality Through Passive Samplers And Low-Cost Monitors, Yan He

McKelvey School of Engineering Graduate Student Theses & Dissertations

Air pollution is a major environmental health concern and has been associated with respiratory disease, cardiovascular morbidity, metabolic disorders, premature mortality, and additional adverse health outcomes. Air pollution often exhibits substantial variability at fine spatial scales, yet conventional regulatory monitoring networks are too sparse to resolve neighborhood-level exposure gradients that may exist in many urban and rural communities. Hyperlocal differences in pollutant concentrations—driven by local emission sources, land use characteristics, atmospheric chemistry, and meteorological conditions—can lead to systematic differences in long-term exposure among populations living only short distances apart. Improving exposure characterization therefore requires dense monitoring strategies and spatial modeling …

Smart Kitchen: Towards Real-Time Ai Systems For Cognitive Support In Daily Activities, Ruiqi Wang

McKelvey School of Engineering Graduate Student Theses & Dissertations

The rapid growth of the aging population and the rising prevalence of Subjective Cognitive Decline (SCD) highlight the need for continuous, unobtrusive assessment of functional cognition during everyday activities. Vision-based smart home systems offer a promising pathway for monitoring behavior and supporting independent living. However, enabling real-time cognitive assistance remains challenging. It requires not only accurately interpreting complex human behaviors to detect cognitive errors, but also supporting real-time deployment on resource-constrained edge devices and under dynamic wireless network conditions. This dissertation presents Smart Kitchen, an AI-driven system for real-time cognitive error detection through the monitoring of daily cooking activities. Under …

Individualized Models For Perception And Cognition, Dominic Marticorena

McKelvey School of Engineering Graduate Student Theses & Dissertations

This dissertation develops individualized models of perceptual and cognitive behavior, inferring latent capacities from limited data with sufficient efficiency, precision, and generality for person-level prediction. In perception, a nonparametric Bayesian framework for adaptive psychophysics is extended from audition to vision, producing an estimator that recovers dense individualized contrast sensitivity profiles through variational inference, a generalized kernel, and information-guided stimulus selection. A multitask extension enables simultaneous estimation of multiple psychometric fields by exploiting shared latent structure. Transferring this inferential logic to cognition, where relevant dimensions must be supplied by task design rather than physics, requires new measurement infrastructure. A Minecraft-based platform …

Revisiting Visualization Literacy: What Standardized Assessments Reveal And Conceal Across Instruments, Cultures, And Ai Systems, Saugat Pandey

McKelvey School of Engineering Graduate Student Theses & Dissertations

Data visualizations are now a primary medium for public communication, scientific reasoning, and decision-making. By transforming complex data into accessible graphical forms, visualizations are widely assumed to make information comprehensible to broad audiences. Yet the ability to accurately read, interpret, and critically evaluate a visualization, what researchers call visualization literacy, is neither uniform nor universal. It is a learned, multidimensional skill shaped by prior exposure, educational opportunity, and context. While the field has developed standardized instruments to measure visualization literacy, these tools were built under narrow assumptions: participants are typically paid, English-speaking, and recruited from Western online panels. When any …

Deep Learning Enhanced Multimodal Endoscopy For Colorectal Cancer: From Real-Time Software Architecture To Clinical Response Assessment, Haolin Nie

McKelvey School of Engineering Graduate Student Theses & Dissertations

Colorectal cancer (CRC) is the third most commonly diagnosed cancer and the second leading cause of cancer-related deaths in the United States, with a concerning rise in incidence among younger adults. Clinical management is currently shifting toward organ-preserving ``watch-and-wait" strategies for rectal cancer and precision endoscopic resection for early-stage polyps. However, current diagnostic standards, including white-light colonoscopy (WLC) and magnetic resonance imaging (MRI), lack the resolution and functional specificity to accurately assess the invasion depth of precancerous polyps or to reliably distinguish post-treatment fibrosis from residual viable tumor. This dissertation advances colorectal cancer diagnostics through three integrated contributions: CPU-optimized photoacoustic …

Benefits Of Traffic Reprofiling For Delay Sensitive Networking, Jiaming Qiu

McKelvey School of Engineering Graduate Student Theses & Dissertations

Deterministic networking systems, such as Time-Sensitive Networking (TSN) and Deterministic Networking (DetNet), require strict end-to-end delay guarantees while efficiently utilizing limited network resources. Conventional approaches typically focus on fixed traffic profiles, which can lead to suboptimal resource utilization in scheduling or admission control problems. This dissertation investigates traffic reprofiling—the proactive reshaping of traffic arrival patterns—as a complementary mechanism for improving both resource efficiency and delay performance under strict service guarantees. The dissertation consists of three parts. The first part studies bandwidth minimization under hard delay constraints for Service Curve Earliest Deadline First (SCED) schedulers. We show that traffic reprofiling can …

Inference-Time Scaling For Robust And Adaptive Computational Imaging, Yuyang Hu

McKelvey School of Engineering Graduate Student Theses & Dissertations

Computational imaging has transformed fields such as medical imaging, computational photography, and remote sensing by combining physical measurement models with advanced image reconstruction algorithms. Two major paradigms have driven significant progress: model-based deep learning (MBDL), which integrates learned priors with physics-based data consistency, and generative models, especially diffusion models, which capture complex image distributions and enable posterior sampling for uncertainty quantification. Despite their success, most existing methods still operate under static inference: they rely on fixed pretrained priors, predetermined sampling procedures, and a fixed forward model during reconstruction. This rigidity limits their robustness in the presence of distribution shift, complex …

Beyond The Game: A Four-Phase Financial Development Program For Student-Athletes, Joanna Cirrincione

Masters Projects

Student-athletes face unique challenges including, but not limited to, significant time demands, limited financial socialization, and emerging name, image, and likeness (NIL) opportunities that influence their financial knowledge and behaviors. Although financial education exists, it is often inconsistent and not tailored to the needs of the population which the education intends to serve. This project is grounded in Nancy Schlossberg’s (1984) transition theory and Nevitt Sanford’s (1962) theory of challenge and support, framing financial literacy development as a process requiring intentional challenge and support as student-athletes transition into life after collegiate athletics. A four-phased, structured development program is proposed to …

Cold Origins Limit The Establishment Of Northern Temperate Plants In The Southern Hemisphere, Mark D Mullinger, Colin P Osborne, Jill C Preston, Simen R Sandve, Maria S Vorontsova, Luke T Dunning

Faculty, Staff and Students Publications

Plants with amphitropical distributions have closely related populations in both Northern and Southern Hemispheres, but are absent from the intervening tropics. They provide a unique opportunity to study the constraints shaping the distribution of temperate lineages through time. Using grasses from the ecologically diverse supertribe Melicodae, an emerging study system with species distributed throughout the temperate regions, we test the hypothesis that geography and/or environmental niche constrain which lineages successfully cross the tropics to establish in the opposite hemisphere. Biogeographic and evolutionary modelling was conducted on well resolved plastid and nuclear phylogenies constructed from whole-genome sequencing of 178 accessions of …

Culturally Tailored Materials For Smoking Cessation And Hiv Care Adherence Among Hispanic Adults: Protocol For Content Development And Formative Evaluation, Rodrigo Castillo-Avilés, Virmarie Correa-Fernández, Marshall K Cheney, Thomas P Giordano, Michael J Zvolensky

Faculty, Staff and Students Publications

Background: Hispanic people with HIV who smoke cigarettes experience unique stressors (eg, stigma), which contribute to health disparities. Anxiety sensitivity (AS) may worsen mood management problems, which are a leading barrier to smoking cessation. Interventions targeting AS can improve HIV-specific outcomes and smoking cessation. However, no prior research has culturally tailored an AS reduction program to improve quality of life among Hispanic people with HIV who smoke. The research team previously developed a mobile health (mHealth) intervention addressing AS reduction, smoking cessation, and HIV care management for Black people with HIV who smoke. Building on this work, this study represents …

Expanding The Mutation Spectrum Of Non-Syndromic Retinitis Pigmentosa In Consanguineous Pakistani Families: Unraveling Novel Pathogenic Variants In Rp1, Pde6b, And Prcd Genes For Precision Diagnosis, Asad Ullah, Asfandyar Ahmad Khan, Yumei Li, Meng Wang, Raeesa Tehreem, Amtul Aziz, Kiran Afshan, Rui Chen, Sabika Firasat

Faculty, Staff and Students Publications

No abstract provided.

Native And Non-Native American Teacher Attitudes Towards Inclusive Special Education Based On Role: A Quantitative, Causal-Comparative Study, Angela Silver Caudle

Doctoral Dissertations and Projects

The purpose of this quantitative, causal-comparative study was to examine whether teacher role (general vs. special education) and self-identified ethnicity (Native American vs. non–Native American) were associated with teachers’ attitudes toward inclusive special education in rural schools in a southern U.S. state. Understanding whether role and ethnicity correspond to differences in attitudes toward inclusion is important for informing staffing, collaboration, and professional learning in rural contexts. Participants included 91 teachers (63 general education, 28 special education). Attitudes were measured with the Multidimensional Attitudes Toward Inclusive Education Scale. Data were collected via an electronic Qualtrics survey. A two-way analysis of variance …

The Relationship Between Emergency Department Nurses’ Occupational Stress, And Their Experience Of Resilience, Chipo Mathis

Doctoral Dissertations and Projects

This qualitative phenomenological study explored the lived experiences of occupational stress and resiliency among emergency department (ED) nurses in a high-acuity urban hospital environment. The study was grounded in the transactional model of stress and coping as proposed by Lazarus and Folkman, conservation of resources (COR) theory as proposed by Hobfoll, and the job demands-resources (JD-R) model to examined how ED nurses perceive workplace stressors, engage available resources, and develop resilience with ongoing clinical demands. The main research question unpacked how occupational stress affects the ED nurses how resilience impact coping, recovery, and professional functioning. It utilized a phenomenological research …

A Phenomenological Study On Korean Christian Immigrants’ Searching For Wholeness, Hyunjin Kim

Doctoral Dissertations and Projects

Wholeness is a way of living that integrates life’s paradoxes into a cohesive whole, and biblically it is living in harmony with God, others, and oneself. While both scientific and biblical perspectives affirm spirituality and virtues as central to wholeness, existing empirical models often fall short of capturing its full scope within Christian and cultural contexts. This qualitative phenomenological study aimed to gain deeper insights into the common essence of Christian wholeness by exploring the lived experiences of wholeness among Korean Christians living in the United States of America. Twelve participants engaged in in-depth interviews and focus groups, and data …

Dementia Caregiver Support: Offering Spiritual And Emotional Guidance To Loved Ones Filling The Gap, William Reid Bishop

Doctoral Dissertations and Projects

The problem at Tremont Church of God is that members offering caregiver support to their loved ones with dementia are unaware of the coping skills needed for support. The purpose of this DMIN action research project is to provide an 8-week training program to teach caregivers techniques for managing their emotional and spiritual needs. The sample population for this project is church members over the age of 18 who are actively caregiving for a spouse or close relative with dementia. The sample size is between 10 and 15 participants. The training is located at Tremont COG. The training is in …

A Causal-Comparative Study Of Critical Thinking Skills In Community College And University Stem Students, Jason H. Tucker

Doctoral Dissertations and Projects

The purpose of this quantitative causal-comparative study was to examine the relationship between STEM students’ classification (freshmen, sophomore, junior, and senior) and their overall critical thinking scores among community colleges and universities in north central Ohio. This study is important because critical thinking has been shown to improve success in collegiate STEM programs and the future careers of their students. In addition, there has been growing interest in examining potential critical thinking differences between STEM students enrolled in two-year community colleges and four-year universities. The sample is composed of 231 community college and university students enrolled in STEM programs. Data …

Fostering Innovative Leadership: A Case Study Of Academic Leaders’ Role In Integrating Ai Technologies In Higher Education, Dorian Ryleigh Harris

Doctoral Dissertations and Projects

The purpose of this case study was to understand the role of higher education leadership in the integration of artificial intelligence (AI) technologies for faculty and administrative decision-making at higher education institutions in the United States of America. The theory guiding this study was the transformational leadership theory as it provides a framework for examining how institutional leaders influence the adoption, implementation, and ethical considerations of AI in higher education. The central research question guiding this study was: How do higher education leaders navigate the integration of AI technologies within their institutions? This study employed a qualitative case study design, …

Elementary Special Educators’ Intentions Regarding The Utilization Of High-Tech Augmentative And Alternative Communication Devices In The Classroom: A Transcendental Phenomenological Study, Macall Brown Benton

Doctoral Dissertations and Projects

The purpose of this phenomenological study was to understand the intentions of elementary special educators in the South County School District regarding the utilization of high-tech augmentative and alternative communication (AAC) in their classrooms. The Technology Acceptance Model (TAM) served as the overarching theoretical framework for the study, emphasizing that a person's behavior is based on their intentions and attitude toward a particular subject. The central research question asked, how do elementary special educators describe their experiences that influence their intentions to implement high-tech AAC devices with students who have complex communication needs? A transcendental phenomenological research design was used …

Self-Compassion And Emotional Regulation: The Moderating Role Of Adhd Traits In Clinical Mental Health Counseling Field Experience Students, Alicia N. Stewart

Doctoral Dissertations and Projects

This quantitative, cross-sectional, survey study explores the potential influences of attention deficit hyperactivity disorder (ADHD) traits on clinical mental health counseling students’ capacity for self-compassion and emotional regulation. This study is grounded in Kristin Neff’s self-compassion theory (2003). Data were collected using self-reporting measures via an online survey platform through Qualtrics. Participants in this study included students in a Council for Accreditation and Counseling and Related Educational Program-accredited Clinical Mental Health Counseling program currently enrolled in field experience courses including practicum, Internship I, and Internship II (N = 35) at a private southeastern university. This study used a Pearson’s r …

No Place To Stand: Gender, Discipline, And The Contradictions Of Military Womanhood, 1945–1975, Angela Bouma

Doctoral Dissertations and Projects

From 1945 to 1975, American servicewomen stood inside an institution that depended on their labor while restricting their place within it. The post World War II military relied on women to sustain administrative, technical, and medical operations across a widening Cold War landscape, yet guarded the authority and recognition attached to combat and command. Women kept global communications running, delivered medical care in field hospitals, and carried out intelligence work that shaped military decisions. However, legal and cultural boundaries limited the reach of such contributions.

The 1948 Women’s Armed Services Integration Act formalized this tension. Regular status came with ceilings …

The Lived Experiences Of Generation X With Social Media Use And Body Image Perception: A Phenomenological Study, Consuela Coburn

Doctoral Dissertations and Projects

Social media use grows worldwide daily with several available applications having both positive and negative values. Several studies found negative effects on mental health and body dissatisfaction in adolescents and young adults. Existing literature predominantly focuses on young female participants, resulting in a gap in understanding the effects of social media use across other age cohorts. This phenomenological qualitative study explored the lived experiences of Generation X adults regarding social media use and the perceived effects on body image. Additionally, this study identified themes that emerged based on the semi-structured interviews of Generation X adults. NVivo 15, a computer assistance …

Understanding The Implications Of Transitional Shifts In Leadership On Higher Education Employees' Departures: A Phenomenological Qualitative Study, Leya Deickman

Doctoral Dissertations and Projects

The purpose of this qualitative phenomenological study was to understand the experiences of employees who chose separation amidst the transition of a new president at small private higher education institutions in the United States. This study aimed to understand how collegiate and university presidential leadership transitions influence employees’ perception of their decision making process to voluntary leave their respective institutions. The theory guiding this study was Homans’ social exchange theory, as it explains social interactions as an exchange using a cost benefit analysis. The central research question was: What are the lived experiences of employees who choose separation amidst the …

Associate Degree Program Administrator Perceptions Of Clinical Dishonesty, Cynthia Moore Swineford

Doctoral Dissertations and Projects

The purpose of this hermeneutic phenomenological study was to explore the perceptions of associate degree nursing program administrators regarding faculty reporting of dishonest clinical behaviors by pre-licensure nursing students. Aristotle’s theory of virtue ethics guided this examination of how administrators interpret ethical responsibility, leadership influence, and professional accountability related to clinical dishonesty. The central research question asked, “What are the perceptions of associate degree program administrators regarding faculty reporting of dishonest student behaviors in clinical settings?” The sample included 11 associate degree nursing program administrators from programmatically accredited nursing programs in three mid-Atlantic states. Data were collected through semi-structured interviews, …

Employee Engagement In The Digital Age, Kimberly A. Wells

Doctoral Dissertations and Projects

The researcher in this qualitative multiple-case study explored how technology has impacted employee engagement in the modern workplace. The problem being addressed is the continual decline in employee engagement, and the limited understanding of whether technology influences engagement -and if so – how it impacts engagement. A flexible design and qualitative methodology were used to conduct semi-structured interviews with 25 subjects across two non-profit organizations. The researcher transcribed each interview, which was then coded and analyzed. The findings revealed several core themes, including digital saturation, device benefits, device etiquette, device boundaries, and technostress. These themes indicate that technology enables greater …

Barriers And Bridges To Mental Health: A Quantitative Study Of Religious Commitment, Mental Health Stigma, And Help-Seeking Attitudes In The Black Community, Catisha Tillman

Doctoral Dissertations and Projects

Mental health is a silent killer in the Black community. The Black community prefers to seek mental health support from their pastors, friends, families, and church members rather than from a professional counselor. This mistrust is seated in a deeply rooted history of transgenerational trauma towards the medical and mental health care system. Stemming from the enslavement of the Black community to the present day, with systemic racism, disparities in mental health care, limited educational resources, and socioeconomic disadvantages. The following research examined how religious commitment affects mental health stigma, help-seeking attitudes, church-based relational support, and perceived barriers to mental …

Bridging The Gap: Leadership Support For Military Veterans Who Transition To Civilian Employment, Kimberly S. Buchanan

Doctoral Dissertations and Projects

A gap in leadership support hinders military veteran employees from effectively leveraging their skill sets during their transition from military service to civilian employment, leading to decreased performance, low job satisfaction, and reduced retention of Veteran talent. This flexible qualitative single-case study explored why gaps in leadership support exist for military veteran employees, the extent to which these gaps hinder the utilization of their skill sets, and how leaders can address them. The study included semistructured interviews with 18 military veteran participants, representative of the U.S. Military and diverse in backgrounds. Data analysis involved coding, theme development, and review of …

A Phenomenological Study Describing The Lived Experiences Of Fire Chaplains With Clinical Pastoral Education (Cpe) Training Within The Federation Of Fire Chaplains’ Organization, Chaplain Cooper

Doctoral Dissertations and Projects

The purpose of this phenomenological study was to describe the lived experiences of fire chaplains with CPE training who used CPE competencies when caring for firefighters. The foundation of spiritual care was based on the ten identified competencies used in CPE. The gap addressed in this research was the lack of spiritual care training for fire chaplains. Dr. Alan Wolfelt’s model of companioning served as the theoretical foundation guiding this research. This model of care emphasized a human-centered, heart-based approach, including active listening, empathy, and the practice of presence, which were essential components for fire chaplains providing spiritual care. This …