Digital Commons Network^™

Learning-Based Mri Reconstruction Method With Coil Sensitivity Estimation And Prior Adaptation, Haoyu Zhang

McKelvey School of Engineering Graduate Student Theses & Dissertations

Magnetic Resonance Imaging (MRI) reconstruction from undersampled multi-coil k-space data is a challenging inverse problem, typically relying on fixed priors such as precom puted coil sensitivity maps. To improve adaptability, we propose a novel framework named Learning-based Coil sensitivity Estimation and Prior Adaptation (LCEPA). LCEPA formu lates reconstruction as a bilevel optimization, using a Joint Deep Equilibrium (Joint DEQ) model in the inner loop to simultaneously estimate images and coil sensitivity maps, while the outer loop adaptively fine-tunes image and coil priors using supervised data. Experiments demonstrate that LCEPA surpasses state-of-the-art methods in terms of PSNR and SSIM, showcasing robust …

The Role Of Piezo1 In Mediating Chondrocyte Cell Signaling And Senescence, Sophie Gretler Paradi

McKelvey School of Engineering Graduate Student Theses & Dissertations

Osteoarthritis (OA), the leading cause of disability, is driven by articular cartilage degeneration and inflammation. Mechanosensitive ion channels PIEZO1 and PIEZO2 have been implicated in OA progression via calcium signaling in chondrocytes. This study investigates the role of conditional Piezo channel knockout (cKO) in modulating calcium signaling and senescence in OA, particularly under the supra-physiologic inflammatory condition of a high-fat diet (HFD). Using calcium imaging, we found that Piezo1 cKO and dual Piezo1/2 cKO significantly reduced Yoda1-induced calcium signaling, while Piezo2 cKO alone had no effect. Under HFD conditions, Piezo1 cKO showed a non-significant trend toward reduced calcium influx, potentially …

Structural Controllability For Switched Linear Ensemble Systems, Yi Li

McKelvey School of Engineering Graduate Student Theses & Dissertations

No abstract provided.

Partially Supervised Reinforcement Learning For Gps-Denied Navigation, Ethan Weilheimer

McKelvey School of Engineering Graduate Student Theses & Dissertations

Navigating dynamic environments is a key challenge for autonomous agents, yet most existing research focuses on 3D settings or settings where the agent has full access to relevant semantics. In this work, we propose a learning framework for aerial navigation in the presence of changing dynamics and limited positional information. Specifically, we consider a drone navigation task where a drone at one time has access to GPS location information, which it has now lost and needs to navigate in the same area but at a future time with no GPS signal and differing transition dynamics. To address this, we introduce …

Automated Beam Stitching And Segmentation Procedure For Space Division Multiplexing Optical Coherence Tomography Angiography, Andrew J. Song

McKelvey School of Engineering Graduate Student Theses & Dissertations

Optical Coherence Tomography Angiography (OCTA) has revolutionized ophthalmic imaging and its capability to produce high-resolution 3D maps of the retinal microvasculature is instrumental in diagnosing retinovascular diseases such as diabetic retinopathy and age-related macular degeneration; However, the existing OCTA devices often suffer from slow acquisition speed limiting the field-of-view (FOV) in the clinic. Space Division Multiplexing OCTA (SDM-OCTA) address these limitations by acquiring multiple beams simultaneously, achieving manyfold faster acquisition speeds than single beam OCTA systems. But as each beam contains only part of the image, SDM-OCTA requires additional processing steps to produce coherent wide-field images. Though manual stitching and …

Functional Devices Based On Freestanding 2d Materials, Shijue Xu

McKelvey School of Engineering Graduate Student Theses & Dissertations

Two-dimensional (2D) materials have attracted extensive attention in the field of nanoelectronics due to their atomic-scale thickness, high surface-to-volume ratio, tunable electronic properties, and compatibility with low-temperature processing. These characteristics make them highly suitable for the construction of emerging device architectures, particularly in both ionic and electronic devices.

In this work, we investigate the application of 2D materials in two distinct classes of devices: ionically-driven memristors and electronically-dominated metal–semiconductor contacts. For the memristor study, we fabricate heterostructure-based resistive switching devices using h-BN and WSe₂ as active layers. These 2D material-based memristors exhibit stable power consumption loops and high linearity …

Comparative Analysis Of Intrinsic Reward-Based Reinforcement Learning Algorithms, Chengyu Li

McKelvey School of Engineering Graduate Student Theses & Dissertations

Reinforcement learning agents often struggle in tasks with sparse or delayed rewards, since they receive little guidance about which actions to pursue. This thesis investigates how adding intrinsic rewards can help address that issue. We focus on three main methods: Count-Based bonuses, where states are hashed and infrequent states receive higher rewards; Random Network Distillation (RND), where a predictor network learns to match the output of a fixed random target; and the Intrinsic Curiosity Module (ICM), which uses an inverse and a forward model to highlight transitions the agent cannot yet predict.

We implement these approaches under a single Proximal …

Go: The Race Against Resignation, Townsend Baird

Bachelor of Fine Arts Senior Papers

How do we go about deriving meaning in the information age, when culture has replaced society, decentering religion? My art practice seeks to answer this with storytelling, specifically in how archetypes can connect mythology, history, and personal narrative to build a functional personal mythology. Through painting fantastical portraits collapsing the compositions of Christian iconography with contemporary motifs, the installations tell strange and humorous narratives. My thesis piece focuses on the marathon, in the context of the original myth of Pheidippides, the common misconceptions about this myth, the infamous 1904 St. Louis Olympic marathon, the 1978 Boston Marathon, and my experience …

Dark Echoes Of The Repressed In Texas Chainsaw Massacre Part 2, Itzel G. Corona

Student Scholar Symposium Abstracts and Posters

Horror films fulfill a unique psychological need in contemporary society, allowing viewers to confront and release repressed impulses. Tobe Hooper's The Texas Chainsaw Massacre, Part Two (1986) exemplifies how the genre explores deeper themes, particularly through phallic symbolism and the unconscious mind. Using the chainsaw as a phallic symbol, the film delves into power dynamics, sexuality, and societal norms, reflecting Freud’s theory of the return of the repressed. This paper applies Freudian psychoanalysis, drawing on works by Murray Leader and Linda Williams, to explore how repressed desires manifest in the film. The chainsaw represents twisted masculinity, with Leatherface embodying repressed …

Analyzing The 2020 Presidential Election & The Second-Generation, Olivia Sacco

Student Scholar Symposium Abstracts and Posters

What impact does second-generation immigrant status have on vote choice in the 2020 presidential election? The research surrounding this issue suggests a strong relationship between immigrants and their support for the Democratic Party. However, it often neglects the political behavior of their children, the second-generation. Immigration and its generational effects on political behavior is both a fascinating and increasingly critical phenomena to understand. By studying a presidential election like that of 2020, I aim to establish the second generation’s preference towards the Democratic Party and its candidate, Joe Biden. Using the American National Election Studies (ANES) 2020 Dataset and logistic …

Jews Of The Antebellum: A Spectrum Of Beliefs On Slavery, Raquel S. Kelley

Student Scholar Symposium Abstracts and Posters

How did recently arrived Jewish immigrants to the United States respond to the debates over slavery in the years leading up to the American Civil War? Jews from Central Europe joined people from various European countries in the stream of immigration to the United States, seeking new opportunities and freedom from persecution. When these Jewish immigrants arrived in the United States, the country was deeply divided over the issue of slavery. As America divided itself along the Mason-Dixon line, so did the new Jewish communities. My research seeks to learn what factors drove some Jews to support abolitionism, while others …

Death, Violence, And Condemnation: The News Media Coverage Of The 1981 Prisoners’ Hunger Strike In Northern Ireland In The United Kingdom And Ireland, Tyler Coker

Student Scholar Symposium Abstracts and Posters

During the Troubles, the ethno-political conflict between the majority Catholics and minority ruling Protestants in Northern Ireland that lasted from 1968 to 1998, the 1981 prisoners’ hunger strike in Belfast’s HM Prison Maze was a key turning point. The starvation death of 10 striking prisoners gained the world’s attention, as one by one Irish prisoners died in British custody. This tragedy helped push the Irish nationalist movement toward a diplomatic means of negotiation. As one of the most influential events during the conflict, the news media covered the strike extensively, shaping the narrative of the strike to largely uninformed audiences. …

Statistics - What Does My Data Say About Me?, Taylor Gadsden-Deterville

Student Scholar Symposium Abstracts and Posters

For my Introduction to Statistics Class, I have been tasked with collecting unique, personal data to give insight into my daily routine. I decided to record nine different outcomes (two qualitative and seven quantitative). On February 6, 2025, I began with a blank Excel sheet, and so far, I have 57 full days of data collected. I will continue monitoring my findings for the remainder of the Spring 2025 Semester. Per my project instructions, I must include tables and graphs for my qualitative and quantitative outcomes. So far, I have collected daily quantitative data on my screen time (Instagram and …

Development Of Interactive Games On An Affordable Braille Display, Daniel Tsivkovski, Dylan Ravel, Maryam Etezad

Student Scholar Symposium Abstracts and Posters

Developing an affordable and STEM learning-focused Braille display addresses a significant disparity in the market for Braille displays, where most fail to provide a cost-effective, accessible, and education-oriented solution. This research aims to bridge this gap through innovative hardware and software development, offering a comprehensive learning experience to elementary school children (K-6) who are blind/visually impaired. The hardware features a piezo-electric tactile display that displays up to six Braille characters at once or a shape in an 8x8 pin array configuration. The educational software includes a user-friendly website packed with engaging STEM activities specifically designed for blind/visually impaired children. The …

“Why Would You Make A Comment Like That?”: Engaging College Students As Allies Through An Evidence-Based Intervention, Kalyn Su, Elyse Tran, Amber Sharma

Student Scholar Symposium Abstracts and Posters

Background: Women, people of color, and LGBTQ+ individuals often experience subtle acts of prejudice (microaggressions) in college settings, which negatively impacts mental health and academic outcomes (Keels et al., 2017). To help improve campus climate, we developed and implemented a 75-minute theoretically grounded workshop to provide students with evidence-based ally strategies. We hypothesized that participants would be more willing to engage in ally behaviors towards LGBTQ+ individuals and people of color experiencing a microaggression after completing the workshop. In follow-up interviews, we examined attendees’ retention of the workshop.

Method: We surveyed 168 workshop attendees about their attitudes and ally behaviors …

Cultural Self-Harm Differences, Erin E. Simmons

Student Scholar Symposium Abstracts and Posters

This study is based on the evident cultural differences in self-harm behaviors and what those behaviors look like specifically for individuals that identify as Black or African American. Previous literature suggests that cultural differences in self-harm exist but very little research centers Black experiences and their connection to self-harm. Self-harm is considered a broad term, and it encompasses a variety of behaviors, some more common than others, but these common behaviors are typically exclusively explored within only a few demographics with a low Black participant pool. This contributes to the assumed lack of self-harm among the Black community but through …

Identity, Migration, And Folklore In Jamaican Postcolonial Literature: A Reading Of Paulette Ramsay’S “Aunt Jen”, Emily Mceachin

Student Scholar Symposium Abstracts and Posters

This project examines the formation of identity in “Aunt Jen,” a coming-of-age novel set in post-independence Jamaica, by exploring how colonialism, migration, and folklore shape the protagonist’s sense of self. Centering on the character Sunshine, the novel unfolds during Jamaica’s political and economic upheavals of the 1970s, including the rise of Michael Manley and the People’s National Party, depicting both the hopes and disillusionments of a young nation. Sunshine’s story parallels these challenges as she navigates her fractured self-image, intensified by the absence of her mother, Aunt Jen, who emigrated to England to escape Sunshine’s father and her internalized colonial …

Comfort Women Statues: Memory And Politics Of The East Asian-American Diaspora, Daniel Kim

Student Scholar Symposium Abstracts and Posters

My research analyzes the contrasting Asian-American perspectives on the Korean “comfort women,” who were subject to sexual exploitation by Japanese occupation forces during World War II. After the war, “comfort women” survivors and others advocated for the memorialization of those who experienced the horrors of sexual slavery. Two such markers include the “Comfort Women Memorial,” a bronze tablet in Palisades Park, New Jersey, placed in 2010, and the “Peace Monument,” a statue of a young Korean woman in Glendale, California, unveiled in 2013. Reactions from the Japanese government, Japanese citizens, and some Japanese Americans have been negative. The Japanese military …

Connection Beyond Coupledom: Do Single Men With Experience In Consensual Non-Monogamy Report Less Loneliness Than Those Without Experience?, Bryan R. Jorden

Student Scholar Symposium Abstracts and Posters

Background: While loneliness is a common experience, research suggests that men may be uniquely affected because of masculine ideals (Berke, Reidy, & Zeichner, 2018). People in consensually non-monogamous (CNM) relationships commonly highlight relationship benefits like shared experiences and social connection (Moors et al., 2017). To better understand how relationship structure shapes men’s connection and loneliness, we examined the experiences of men with and without prior engagement in CNM.

Method: Survey data were drawn from a U.S. Census-based quota sample of 747 men with experience in polyamorous, swinging, or open relationships, and 1,431 men with no such experience (total N = …

Analyzing The Impact That Partisan Media Had On Vote Choice In The 2020 U.S. Presidential Election, Hannah E. Fox

Student Scholar Symposium Abstracts and Posters

This study examines whether the partisan media that voters consume significantly influenced their vote in the 2020 U.S. Presidential Election. The study tests the hypothesis that individuals who frequently engaged with left-leaning media such as CNN were more likely to vote for Joe Biden, while voters consuming right-leaning media like FOX were more likely to vote for Donald Trump. This research contributes to a broader discussion of how different political, social, and economic factors influence voters' choices. Understanding the intersections between these ideas can provide deeper insights into some influencers in the outcomes of major elections as well as broader …

Spring 2025 Student Scholar Symposium Abstract Volume, Chapman University Center For Undergraduate Excellence

Student Scholar Symposium Abstracts and Posters

No abstract provided.

Exploring Smoking Habits, Neighborhood Characteristics, And Polygenic Risk: Data Analysis Using The Health And Retirement Study, Morgan E. Albert

Student Scholar Symposium Abstracts and Posters

Smoking is among the leading causes of death, necessitating the identification of individual and environmental risk factors. The study tested the hypotheses that both genetic risk and perceiving one’s neighborhood as undesirable (i.e., that the neighborhood was less cohesive and more disordered) would increase smoking risk. An additional hypothesis was that these individual and neighborhood-level risk factors may synergistically increase smoking risk. Data from the Health Retirement Study, a racially/ethnically diverse sample of older U.S. adults, was utilized for this study. All but one hypothesis was supported within this study. Non-Hispanic White participants who perceived their neighborhoods as more cohesive …

From Pagan Chieftains To Christian Kings: Shaping Medieval Nordic Political Culture, Carissa Chinnery

Student Scholar Symposium Abstracts and Posters

This research investigates how the Christianization of Scandinavia between the 800s and 1100s transformed Nordic political culture, particularly in relation to governance, kingship, and Scandinavia's integration into European Christendom. The adoption of Christianity contributed to the centralization of power, replacing the previous decentralized chieftain-based system with hereditary monarchies legitimized through Christian ideology. Additionally, the establishment of church institutions played a critical role in administrative development, reinforcing royal authority and expanding government structures. Methodologically, this study analyzes historical texts such as Heimskringla by Snorri Sturluson, which offers a narrative perspective on Christianization. Archaeological evidence, including church remains, runestones, and burial sites …

Queerness In The Ability To Choose, Haley Kamola

Student Scholar Symposium Abstracts and Posters

This presentation delves into examples of LGBTQ+ authors and characters within the choose your own adventure genre. With a primary focus on Anna Anthropy’s story game “queers in love at the end of the world” and Carmen Maria Machado’s memoir In The Dream House, instances of queerness found within the choose your own adventure genre are analyzed. Anthropy’s story game depicts two women with ten seconds to live until the world ends. The story game itself only exists for ten total seconds before players are given the chance to restart and try again. Machado’s memoir retells her experience in an …

Dual Perspectives: Exploring Self-Identity Development In Twins, Sophia V. Lucas

Student Scholar Symposium Abstracts and Posters

While psychological research often uses twins to compare genetic and environmental influences on development, little attention has been given to the lived experience of twins themselves. This study aimed to target this issue by investigating the developmental implications of being a twin, with a particular focus on the formation of self-identity and individuality. Participants were asked to complete a survey that explored topics such as their self-concept, attachment style, and perceived level of experienced social comparison with their sibling. Results found a statistically significant difference between twins and non-twin siblings on a measure of self-concept, in that twins scored higher …

Flourish And Student Loneliness: A Digital Positive Psychology Intervention, Jess M. Savela-Gomez, Alex Kraft, Julie Cachia, Xuan Zhao, John F. Hunter

Student Scholar Symposium Abstracts and Posters

Objective: The Flourish app is an AI-powered proactive approach to mental health, using positive psychology interventions. This study investigates the role of Flourish in impacting loneliness in college students. We hypothesize that there will be a significant difference in loneliness between conditions, where those who use Flourish will report greater decreases in loneliness than those who are in the control condition. Furthermore, we hypothesize that gender will moderate this difference, where women experience a greater decrease in loneliness in comparison to other genders. Methods: We conducted a randomized control trial (RCT) with 486 college students. In this 6-week longitudinal study, …

How Ideological Background Affects Consumption Of And Attitudes Toward Pornography Amongst Women, Roslyn N. Addy

Student Scholar Symposium Abstracts and Posters

Pornography is a notoriously male dominated field in consumption terms and as such, research regarding women’s consumption of pornography is limited and often contains focus on men’s consumption of pornography. The research conducted by Roslyn Addy and Dr. Desiree Crevecoeur-MacPhail intends to bring women in the pornography sphere as consumers rather than onlookers or subjects of pornography affected by male pornography users. Little is known about women’s actual thoughts, feelings, and use of pornography which limits the market of pornography that targets women and limits real conversations about pornography between women. The researchers have found that ideology does predict pornography …

Leading And Following: Exploring The Impact Of Mentorship On Collegiate Dancers, Peyton Winsett

Student Scholar Symposium Abstracts and Posters

Mentorship plays a pivotal role in student development across various disciplines, yet its specific impact on dancers within collegiate programs remains underexplored. This literature review and small pilot study investigates the hypothesis that mentorship in university dance programs positively influences students’ artistic identity, academic achievement, and career readiness. Drawing from six empirical studies, including research in arts education, peer mentorship, and emotional development, the paper analyzes how mentorship structures shape dancers’ holistic growth. While mentorship is generally associated with beneficial outcomes, findings also reveal critical nuances regarding mentorship quality, accessibility, and the risks of informal or biased systems. Through a …

As Above, So Below: The Cognitive Impact Of Found Footage Horror, Josephine Railston

Student Scholar Symposium Abstracts and Posters

What makes a horror movie good? Why do we like horror movies? Using the 2014 movie As Above, So Below my poster presentation explores the cognitive impact of found footage horror on its viewers. Employing the use of a handheld camera and first person perspective, the film is able to immerse its audience in a supernatural version of the Paris Catacombs. I discuss found footage as a narrative tool, particularly focusing on how it amplifies psychological and physical responses like fear and anxiety.

Does Choice Of Media Amplify Support For Political Violence?, Nathan Palomares

Student Scholar Symposium Abstracts and Posters

Acts of political violence have increased in frequency and exposure to American society via news media. Violent rhetoric is a common theme among many forms of media Americans consume, including social media, which has become an essential platform where Americans increasingly get political news information. The events of the January 6 Capitol Riots and the attempted assassination of President Donald Trump in late 2024 show how urgent the rise of political violence is and its destabilization of American Democracy. In this paper, I examine the relationship between the types of news media people consume and their potential to increase people’s …