Digital Commons Network^™

Atrial Fibrillation Detection From At-Rest Ppg Signals Using An Sdof-Tf Method, Mamun Hasan, Zhili Hao

Mechanical & Aerospace Engineering Faculty Publications

At-rest PPG signals have been explored for detecting atrial fibrillation (AF), yet current signal-processing techniques do not achieve perfect accuracy even under low-motion artifact (MA) conditions. This study evaluates the effectiveness of a single-degree-of-freedom time–frequency (SDOF-TF) method in analyzing at-rest PPG signals for AF detection. The method leverages the influence of MA on the instant parameters of each harmonic, which is identified using an SDOF model in which the tissue–contact–sensor (TCS) stack is treated as an SDOF system. In this model, MA induces baseline drift and time-varying system parameters. The SDOF-TF method enables the quantification and removal of MA and …

Improving Prenatal And Postpartum Care Gaps In Breathitt County, Megan Deaton

Theses and Dissertations--Public Health (M.P.H. & Dr.P.H.)

Maternal and infant health remain a major public health issue across the United States, particularly in rural communities. Barriers such as shortages of obstetric providers, transportation challenges, and limited access to prenatal and postpartum care contribute to delayed care, low follow-up rates, and an increased risk of poor outcomes, including preterm birth and low birth weight. In response, the proposed Maternal and Infant Health Program aims to address gaps in care access through a home visiting model that provides in-home support, maternal health education, care coordination, and referrals to healthcare services, with a direct focus on Breathitt County. Expected outcomes …

Simulating Social Attitudes With Llms: Accuracy, Demographic Effects, And Refusal Behavior In The Sensitive Domain Of Suicide Prevention, Cristina J. Perez, Michael P. Vasquez Jr., Philippe J. Giabbanelli, Patrick Y. Wu

VMASC Publications

Large language models (LLMs) are increasingly used to simulate public opinion, yet their validity in sensitive policy domains remains underexplored. We evaluate whether LLMs can reproduce attitudes toward suicide prevention policies using 32 questions drawn from seven nationally representative U.S. surveys (2023-2025). We systematically vary demographic conditioning (race/ethnicity, gender, age, education, income, party), prompt framing (direct elicitation, respondent embodiment, specialist embodiment), and model architecture (GPT-5 Nano, DeepSeek V3.2, Meta Llama 3.1 8B, Mistral Small 24B). Across 811,560 prompts, the mean absolute error—the average gap between predicted and human response distributions—is 23 percentage points. We also find that LLM responses to …

Computational Study Of Rotating Detonation Combustors, Aditya Balasubramaniam

Mechanical and Aerospace Engineering Theses

Rotating detonation combustors (RDCs) are pressure-gain combustion devices that sustain one or more continuously rotating detonation waves, offering potential thermodynamic and performance advantages over conventional deflagration-based systems. Their behavior depends strongly on combustor geometry and operating conditions. Understanding these effects is therefore essential for the design and optimization of practical RDCs. Accordingly, this thesis numerically investigates annular RDCs with two primary objectives: (1) to evaluate the effects of propellant mass flux and (2) to assess the influence of annular width on detonation-wave dynamics and combustor performance.

A finite-volume framework is used to solve the compressible reactive Euler equations with hydrogen–air …

Scalable Quantum Network Routing Through Reinforcement Learning And Resource Optimization, Tasdiqul Islam

Computer Science and Engineering Dissertations

Long-distance quantum communication depends on distributing high-delity entanglement across quantum repeaters. Entangled states are fragile: they decohere in memory, are consumed when used, and lose delity after each swap. Quantum routing therefore diers from classical routing: an algorithm must decide not only the path, but when to generate, store, swap, and consume entanglement before they lose their usefulness. This dissertation studies scalable resource allocation and routing for quantum networks under delity, memory, and concurrency constraints. It rst addresses re- peater deployment with heuristics that nd near-optimal locations while cutting com- putation from days to seconds versus integer linear programming (ILP). …

Early Detection And Objective Assessment Of Neonatal Hypoxic-Ischemic Encephalopathy Severity, Soheila Norasteh

Bioengineering Dissertations

Hypoxic–ischemic encephalopathy (HIE) is a neonatal brain injury caused by reduced oxygen and blood flow to the brain around the time of birth. It remains a major cause of neonatal mortality and long-term neurodevelopmental impairment worldwide. Therapeutic hypothermia is the standard treatment for moderate-to severe HIE and improves outcomes when initiated within the first six hours of life. Therefore, accurate assessment of injury severity during this period is essential. Cur rently, HIE severity is determined primarily through neurological examination and classified as mild, moderate, or severe. However, these examinations are subjective, cannot provide continuous monitoring of brain function, and may …

Reliable And Label-Efficient Learning For Open-World Visual Perception And Robot Learning Under Uncertainty, Zongyao Lyu

Computer Science and Engineering Dissertations

Modern learning systems deployed in open-world environments must make reliable decisions despite predictive uncertainty, previously unseen classes, limited annotations, and distribution shifts. This dissertation develops methods for reliable and label-efficient learning in visual perception and robot control.

First, this work studies uncertainty in object detection by representing semantic and spatial predictions probabilistically. A deep-ensemble framework aggregates detections into class-probability distributions and probabilistic bounding boxes, while a subsequent extension combines deep ensembles with Monte Carlo dropout to further investigate predictive uncertainty. Second, this dissertation addresses open-set recognition, where classes absent during training may appear at inference time. An empirical study shows …

Exploring K-2 Teachers’ Perspectives Around Screen Time In Blended Learning Classrooms, Cameryn Lee Ronspies

Dissertations and Theses

The integration of digital technologies in primary education has transformed instructional practices, yet the use of screen time in K-2 classrooms remains a debated issue. While prior research has examined the effects of screen time on children’s development and learning outcomes, little is known about how teachers themselves make decisions regarding its use in the classroom. This study explores how K-2 teachers in blended learning environments navigate the complexities of screen time. Despite debate among researchers, few policies exist to guide teachers in regulating the quality and duration of screen use, leaving teachers to make complex decisions independently. Grounded in …

Geography Of Erasure: Manufactured Housing, Heat Exposure, And State Neglect In Florida, Gianna M. Hutton

Pomona Senior Theses

This thesis examines Florida's manufactured housing communities through the intersecting frameworks of energy justice, critical heat studies, and housing displacement scholarship, centering how structural, political, and economic forces shape uneven exposure to thermal insecurity and housing precarity. Using a mixed-methods approach combining statistical regression analysis of American Community Survey microdata (2019-2023) and spatial case study of Miami-Dade County's heat governance and The Li'l Abner Mobile Home Community’s displacement, this research investigates how manufactured housing residents experience compounded exclusions across energy systems, urban heat governance, and housing security. The findings reveal that manufactured home residents face a 26% higher energy burden …

Place-Branding In The Japanese Agricultural Industry: A Discourse Analysis Of National, Prefectural, Municipal, And Producer Perspectives, Miyu L. Owada

Pomona Senior Theses

This essay is a case study of place-based agricultural branding in Japan, particularly in the sub-urban context of Mitaka City, Tokyo. Shifting the focus from rural revitalization models typically studied in this field, this study brings sub-urban landscapes into the conversation. Although existing studies assume a top-down policy is implemented for agricultural branding in Japan, the study assesses to what extent this structure holds true for the Mitaka context, comparing narratives across four tiers: the national Ministry of Agriculture, Forestry, and Fisheries (MAFF), the prefectural Tokyo Metropolitan Government (TMG), the municipal Mitaka City and Japan Agricultural Cooperatives (JA) Tokyo Musashi …

Left In The (Road) Dust: Analyzing Advanced Clean Cars Ii In California’S Disadvantaged Communities, Jj Hoffman

Pomona Senior Theses

Across the United States, air pollution disproportionately impacts minority groups. California’s Advanced Clean Cars II (ACC II) waiver was positioned to lead to significant environmental justice impacts, such as reductions in emissions and adverse health outcomes, by establishing stricter regulations for vehicle emissions and ensuring that 100 percent of new passenger vehicle sales are zero-emission by 2035. As the federal government recently nullified ACC II, pollution, and by extension health, could worsen, especially in disadvantaged communities. The thesis established several important relationships, including how disadvantaged communities experienced higher traffic, pollution, and worse health outcomes than non-disadvantaged communities. Though the results …

An Llm-Driven System For Doctor-Patient Simulation, Akilan Amithasagaran

Computer Science Theses

Effective physician-patient communication is fundamental to clinical competence, yet traditional simulation-based training methods using standardized patients and high-fidelity manikins are costly, resource-intensive, and difficult to scale. This dissertation presents CLiVR (Conversational Learning system in Virtual Reality), an LLM-driven system that integrates large language models and 3D avatars to simulate doctor-patient interactions for medical communication training.

CLiVR addresses three key limitations in existing virtual reality medical training platforms. First, the system operates on standalone Meta Quest 3 hardware with realistic 3D patient avatars featuring synchronized lip movements and speech-based interaction. Second, CLiVR grounds LLM responses using a curated syndrome-symptom database, constraining …

(R)Evolutionary Cultural Literacy: Pauli Murray’S Boundary-Crossing Tripartite Pedagogy, Lorise Ann Diamond

CGU Theses & Dissertations

Civil rights lawyer, poet, activist, questioning, and Episcopal priest Pauli Murray spent seven decades generating legal doctrine, autobiography, poetry, and institutional redesign across some of the most hostile yet fecund terrain American public life produced. Scholarship across rhetoric and writing studies, cultural studies, Black feminism, and critical pedagogy has theorized literacy, movement, and commons-making as separate concerns. What the field of cultural literacy lacks is a framework that holds those concerns together, reads them through a focused body of texts, and translates them into a transferable pedagogy applicable across academic, civic, and institutional settings. This dissertation argues that cultural literacy …

Electron Beam Irradiation Effects On Bulk Metals: A Comparative Study Of Polycrystalline Versus Single-Crystalline Structures, A. A. Elmustafa, N. A. Sultana, A. H. Al-Allaq, M. Ojha, Y. S. Mohammed, J. Vennekate, H. Baumgart

Mechanical & Aerospace Engineering Faculty Publications

This study investigates the effects of electron beam (e-beam) irradiation on the mechanical and structural properties of eight bulk metallic samples, comprising both polycrystalline (PC) and single-crystalline (SC) forms of Ni, Cr, V, and Ti. These metals were evaluated as potential candidates for beam exit windows in high-power (MW-class) particle accelerators. The primary objective is to identify metals capable of withstanding the conditions of high-power/MW-class e-beam accelerators and serve effectively as exit windows. Selection criteria were based on each metal’s intrinsic properties, power dissipation capability, and irradiation-induced changes in mechanical behavior, including hardness, elastic modulus, and defect density. Comprehensive characterization …

From Comparison To Integration: Building Energy Simulation Tool Variability And The Case For Intelligent Retrofit Workflows, Amir Safari, Dalya Ismael, Mahsa Safari, James Freihaut

Engineering Technology Faculty Publications

As the urgency to address climate change and modernize energy infrastructure grows, the building sector plays a key role in improving energy efficiency and reducing carbon emissions. This study evaluates five energy retrofit strategies for Building 101 at The Navy Yard in Philadelphia, comparing two real-world proposals from energy service companies with three simulation-based packages derived from Building Energy Simulation (BES) tools. The study examined whether advanced BES tools provide greater accuracy and decision-making value compared to simpler alternatives. Electricity savings ranged from 5 % to 40 %, gas savings from 29.7 % to 61 %, and annual cost reductions …

An Exploration Of Academic Help-Seeking Among Postsecondary Students: Differences By Gender And Ethnicity, Stephanie Greenquist-Marlett, Linda Bol, Claire Consadine, Courtney Hill

STEMPS Faculty Publications

Students often struggle to employ effective learning and study strategies in postsecondary settings that challenge their academic success. These struggles can be amplified depending on student characteristics like gender and ethnicity. One way to improve their success is an awareness they may need help and how to most productively use this help. We sought to understand students’ patterns of help-seeking behaviors as well as whether these patterns differed by gender and ethnicity. The researcher-developed Academic Help-Seeking Inventory (AHSI) was designed to measure academic help-seeking. Participants were 249 undergraduate and graduate students enrolled at two East Coast public universities. An exploratory …

Characterization Of Phytoplankton-Excreted Metabolites Mediating Carbon Flux Through The Surface Ocean, Yuting Zhu, Hanna S. Anderson, Eli Salcedo, Samuel E. Miller, Krista Longnecker, Melissa C. Kido Soule, Sheean T. Haley, Gretchen J. Swarr, Rogier Braakman, Sonya T. Dyhrman, Elizabeth B. Kujawinski

Chemistry & Biochemistry Faculty Publications

The marine labile dissolved organic carbon (DOC) pool is a dynamic reservoir of thousands of molecules that cycles approximately one-quarter of Earth’s primary production within days to weeks. After excretion by phytoplankton and other microbes, metabolites are rapidly consumed, resulting in low standing concentrations (picomolar to low nanomolar). Despite the decades-long search for labile DOC sources and molecular identities, marine phytoplankton exometabolomes are not well characterized, largely due to difficulties in measuring small polar molecules in saline water. Here, we profiled the exometabolomes of six axenic phytoplankton species representing key functional groups including a diatom (Thalassiosira pseudonana CCMP1335), a …

The Role Of Education In Reducing Social Inequality: A Systems-Level Analysis Of Socio-Technical Infrastructures And Policy Governance, Aisling O'Shea, Batzorig Dashnyam, Ximena Quintanilla

Women's & Gender Studies Faculty Publications

Social inequality remains one of the most persistent challenges to global systemic stability, threatening the robustness of democratic institutions and economic sustainability. Education has long been theorized as the primary mechanism for social mobility and the mitigation of disparate life outcomes; however, its role within modern socio-technical infrastructures is increasingly complex and often contradictory. This paper provides a comprehensive systems-level analysis of the relationship between educational architecture and social stratification. By examining the structural trade-offs inherent in contemporary pedagogical deployment, the research evaluates how institutional governance, digital infrastructure, and policy mandates either facilitate or hinder the reduction of inequality. The …

Sulfhydryl-Functionalized Diarylethenes: Synthesis, Photoswitching, And Fluorescent Properties, Pramod Aryal, Jonathan Bietsch, Gowri Sankar Grandhi, Josh Choi, Guijun Wang

Chemistry & Biochemistry Faculty Publications

Sulfhydryl group (SH) plays important roles in reactions with various functional groups, especially in biologically active systems. Photoswitchable diarylethene (DAE) derivatives have demonstrated applications in many research fields. Among the many classes of diarylethene derivatives, thiol derivatives have not been extensively explored. In this study, we systematically synthesized and characterized a series of bis-thiol functionalized dithienylethene derivatives. The thiol groups in this series are attached directly to the thiophene, or through a phenyl or methylene linker. Each series incorporated both dithienyl cyclopentene and hexafluorocyclopentene bridges and total six thiol substituted diarylethenes were synthesized. Among the six sulfhydryl DAE derivatives, four …

Land Use Influences Dissolved Organic Matter Composition In The U.S. Coastal Critical Zone Network, Aleksandar I. Goranov, Elizabeth V. Whitney, Brian R. Moyer, Katherine L. Tully, Patrick G. Hatcher, Yu-Ping Chhin

Chemistry & Biochemistry Faculty Publications

Coastal watersheds are highly productive biogeochemical systems supporting robust coastal fisheries and contributing significantly to the marine gross primary production flux. These ecosystems are comprised of civil infrastructure, farms, forests, and marshes, and their diversity is reflected in the quantity and quality of dissolved organic matter (DOM). Here, we assess the role of farming in influencing DOM from surface waters of six coastal tidal creeks adjacent to forest and farm sites in the US Critical Zone Network. Molecular fingerprinting using electrospray ionization - Fourier transform - ion cyclotron resonance - mass spectrometry revealed that farm-influenced DOM was enriched in nitrogen-, …

Multidentate Surfactant-Dependent Synthesis Of Giant Iridium Superstructures, Ramjee Balasubramanian, Maeren E. Hill

Chemistry & Biochemistry Faculty Publications

Giant superstructures of iridium, comprised of smaller spherical and slightly larger anisotropic nanoparticles, were synthesized by reducing iridium chloride in the presence of resorcinarene, a class of tetrameric macrocyclic polyphenols, with sodium borohydride in ethanol in 30 min under mild conditions. These superstructures were characterized by a range of techniques including TEM, HRTEM, EDS and other spectroscopic methods. The impact of the macrocyclic surfactant, its features and reaction conditions in dictating the formation of giant iridium superstructures was evaluated. The packing density of nanoparticles in these giant iridium superstructures could be altered qualitatively by varying the duration of the reaction, …

References, Appendices & All Parts Merged, Konstantin Likharev

Essential Graduate Physics

Includes: Appendix MA: Selected Mathematical Formulas; Appendix UCA: Selected Physical Units and Constants; References; EGP merged file (all parts, appendices, and references)

Antitrust And Tech Giants: Learning From United States V. Google Llc, Marcus D’Agostino

Fordham Journal of Corporate & Financial Law

This Note addresses the evolution of antitrust regulation and enforcement in the United States, with a focus on the recent case of United States v. Google LLC. That case is used to frame the broader problem of insufficient remedies being implemented against large technology firms. The mild remedies granted to the government in Google reinforce the findings of the 2020 Congressional Report on Digital Competition. The Report recommended changes to the antitrust laws that would revive structural separation as a remedy. This Note argues that the body of evidence presented compels structural separation to be used more frequently as the …

A Ministry Manual For Supporting Pastoral Transitions: Addressing The Emotional And Spiritual Needs Of Clergy And Their Families, John Tucker

Dissertations

Pastoral transitions represent spiritually significant yet often under-supported moments in the life of clergy, congregations, and ministry networks. While leadership change is frequently framed in theological language emphasizing divine calling and institutional continuity, insufficient attention is given to the emotional, relational, and familial dimensions of these transitions. This Doctor of Ministry project examines the spiritual and emotional impact of pastoral transitions within African American church contexts, with particular attention to clergy wellbeing and systems of care.

This study employed a mixed-methods research design integrating quantitative survey data with qualitative semi-structured interviews. Survey instruments were distributed to pastors affiliated with The …

Silent Struggles: The Hidden Burden Of Depression Among Black Single Mothers In Ghana, Sonja Brown

Doctor of Ministry

Reflections Through the Single Mothers of the Bible examines depression among Black single mothers in Ghana as an overlooked yet urgent mental, physical, economic, social, and Spiritual concern, highlighting the need for integrated Faith-based and community-centered responses. While global attention to maternal mental health has increased, the lived experiences of Black single mothers, particularly within faith-shaped, patriarchal, and economically constrained Ghanaian contexts, remain underrepresented in scholarly research, theological discourse, and public policy. This gap presents a problem and an opportunity to develop holistic, culturally responsive, and faith-informed approaches to care and advocacy.

This dissertation argues that depression among Black single …

Digging Deep: Food Sovereignty, Belonging & Community- A Systemic Approach, Julie Lynn Gullett

Doctor of Ministry

Set in the rural, agrarian context of Lewis County, Washington, one of the poorest counties in Washington State, this project explores the following NPO: Addressing the concerns of marginalized populations by fostering care of Creation, offers an innovative path to meaningful reciprocal community connections, and a future filled with hope. Drawing on the wisdom and methodologies of Seedpod Farm, my vocational context, a key insight of the Project centered on three interrelated outcomes that my research identified as critical for success: Sovereignty through the development of food skills, belonging through mentoring and cohort relationships, and fostering community connections through service. …

Generative Ai Professional Development Program For Higher Education Instructors, Sheena Bahra

Dissertations

As technology progresses and brings enhanced forms of artificial intelligence (AI), such as generative AI (Gen AI), it continues to affect education by introducing opportunities and challenges in its application to higher education teaching. Advances in technology can make instructors reluctant to use applications, leading to missed learning and skill-development opportunities for higher-order thinking skills. This study investigates how AI professional development (PD) training can influence higher education instructors’ willingness to use Gen AI in the classroom. This study employed a qualitative instrumental case study design informed by an exploratory lens. The study investigated instructors’ use of Gen AI in …

Testing The Governance Premium: Board Gender Diversity And Crisis-Period Returns During The Pandemic, Rhea Kulkarni

CMC Senior Theses

This paper examines whether board gender diversity predicts cumulative abnormal returns for S&P 1500 firms during the COVID-19 pandemic. Motivated by prior evidence linking board gender diversity to crisis-period stock performance and the broader question of whether governance quality is priced during periods of acute market stress, this study estimates cumulative abnormal returns across three economically distinct event windows covering the crash, recovery, and post-recovery periods using the Carhart (1997) four-factor model to test whether board composition translated into divergent outcomes across firms. The results fail to find evidence that board gender diversity predicts cumulative abnormal returns across any of …

Sustainable Mobility In International, European And National Law: A Perspective From Europe, Lando Kirchmair

Journal of Law and Mobility

This Article develops a European perspective on sustainable mobility, a concept still underexamined in legal scholarship, and argues that meeting today’s mobility needs while preserving ecological foundations for future generations will not occur without deliberate regulatory intervention. After clarifying the evolution of the core concepts of sustainability, mobility, and sustainable mobility, the Article shows how international, European, and Austrian law have progressively incorporated sustainability goals in the transport sector. It then proposes a taxonomy of financial incentives–from subsidies and tax breaks to behavioral nudges—and evaluates their effectiveness, emphasizing the need for flexible, context-specific regulatory instruments. Applying these insights to self-driving …

Book Review: Automobiles, Cultures And The Question Of Law, Stephen M. Young

Journal of Law and Mobility

Unsettling Colonial Automobilities: Criminalisation and Contested Sovereignties is a compelling interdisciplinary and multileveled study that sits at the intersection of law, criminology, settler colonial studies, and cultural analysis. The authors are well-suited to this task. They include Professors Harry Blagg, with expertise in First Nations community-engaged criminology; Thalia Anthony, from legal and carceral studies; Wiradjuri scholar Juanita Sherwood, who studies Indigenous health and community research; and Kieran Tranter, an expert in cultural legal theory. Together, they offer a layered interrogation of how the motor vehicle and automobility shape the settler colonial ordering of Australia.

This review is comprised of three …