Digital Commons Network^™

Exploring The Effects Of Pest-Induced Hemlock Mortality On Growth In Neighboring Trees, Sidney L. Booher

McNair Culminating Research Projects

Trees provide many important products and services to humans. In particular, tree growth is critical to carbon storage, air and water quality, and helps determine demographic processes like population growth and reproductive success. Importantly, tree growth is sensitive to both abiotic (environmental) and biotic factors and is vulnerable to ecological disturbances. Understanding how tree populations respond to disturbances, like invasive pests, is therefore crucial to formulating timely and effective forest management practices.

Here, I used tree ring analysis to investigate how competition for water between neighboring trees changes following the decline of Eastern and Carolina Hemlock(ECH) trees due to the …

Exploring The Link Between Substance Use Severity And Self-Stigma: The Moderating Role Of Enacted Stigma, Alaya Shelton

McNair Culminating Research Projects

Self-stigma has been shown to negatively impact treatment engagement, recovery, and reintegration outcomes among individuals with substance use and criminal histories (Moore et al., 2023). Further, prior research has shown that markers of an individual’s substance use treatment history (e.g., number of prior treatment episodes and perceived substance use severity; Hammarlund et al., 2018; Luoma et al., 2012; Silveira et al., 2016) and negative experiences with medical professionals (Hoover et al., 2022; Muncan et al. 2020) are closely linked to self-stigma. While these factors independently contribute to one’s level of self-stigma, to our knowledge, no prior work has examined how …

Probabilistic Characterization Of Voltage Glitching Attacks, Anna Filyurina

Computer Science Senior Theses

Glitching, or Fault Injection, is an effective hardware hacking technique used in industry but largely unstudied in academia. Industry-led study of glitching is result-driven and overwhelmingly proprietary, meaning that a scientific approach to glitching is seen infrequently and published even less.

This thesis aims to be part of the effort to bring glitching to the attention of the academic side of the cyber security community. Specifically, this work aims to characterize and explore the probabilistic nature of fault injection that has been previously overlooked. Although from a purely result-driven point of view probabilistic nature of a phenomenon suggests unreliability and …

Exploring Strategies For Reducing Employee Turnover In Healthcare Facilities, Khaddy Jammeh

Walden Dissertations and Doctoral Studies

No abstract provided.

Examining The Relationship Between Leadership Styles And Staff Retention In Healthcare, Stephanie Michelle Brown

Walden Dissertations and Doctoral Studies

No abstract provided.

Wounded Domestic Ecologies: Ecofeminist Readings Of Gendered Trauma In Purple Hibiscus, Erere Victory Iwhi

Theses and Dissertations

This thesis examines Chimamanda Ngozi Adichie's Purple Hibiscus through an ecofeminist and postcolonial ecocritical lens, developing the concept of "wounded domestic ecology" to analyze how gendered violence operates within domestic space. Drawing on trauma studies, particularly J. R. Kurtz and Rob Nixon's concept of slow violence, it argues that harm in the novel is accumulative, produced through repetition, surveillance, ritual, and spatial regulation. Eugene's household functions as an environment that disciplines bodies, governs language, and embeds fear into everyday life. In contrast, Aunt Ifeoma's home in Nsukka offers a counter-ecology structured by sound, shared labor, and dialogic authority, interrupting the …

It's (Not) Raining Men: Exploring The Themes Surrounding Low Male Presence In Pediatric Nursing, Marcin Janczak

Honors Projects

Background: Men remain underrepresented in nursing, with an even smaller presence in pediatric nursing. Purpose: To examine pediatric-specific themes that may contribute to the low presence of men in pediatric nursing, and strategies to counteract these potential barriers. Methods: CINAHL Ultimate and Google Scholar were searched for primary research published from 2015 to 2025 related to male nurses, male nursing students, gender bias, pediatric care, and clinical experiences. Findings: Four major themes emerged: gender stereotypes and the feminization of pediatric nursing, sociocultural barriers and gender bias, fear and distrust toward male nurses, and psychological and professional impacts on men in …

Iris - Integrated Reef Information System, Colin Friedel, Zach Henderson, Cooper Mccarthy, Elias Pedroza, Thatcher Steele-Maley

Interdisciplinary Design Senior Theses

Our project provides an independent addition to the existing REEF Sensor Network, which has been created by the Santa Clara University Robotics Systems Lab and is planned to be deployed in the Palos Verdes Reef. Our system enables wireless transmission of data from the submerged sensor network to the scientist on land by designing and implementing a submersible winch mechanism to automatically raise and lower a buoy from the ocean floor to the surface, and cellular connectivity to wirelessly transmit collected data from the buoy to shore. After the data is transmitted, the buoy is lowered back to the sea …

Group Operations For Concurrent Binary Search Trees, Theodora R. Cooper

Dissertations and Theses

A group operation performs multiple independent instances of the same operation on a data structure. For example, a group operation might look up 10 different keys in a binary search tree, returning 10 results. Chen et al introduced group prefetching, an optimization for group operations on linked data structures that improves throughput by overlapping memory access latencies for independent traversals. Constructing code that maximizes this throughput benefit by fully leveraging the instruction- and memory-level parallelism available on modern hardware is challenging because of overhead, interactions with the cache hierarchy, and other factors.

To address these challenges, we present two new …

Expanding Transmobilities: Understanding Genderdiverse And Transgender Travel Behavior Through An Art-Informed Methodology, Nicholas Michael Puczkowskyj

Dissertations and Theses

Transgender and genderdiverse people face discrimination and harassment in public when making trips in Portland, OR. People who identify as genderdiverse or transgender create unique travel behavior due to the influence of their internalized and expressed gender identity and through interactions in public. This dissertation examines how gender identity influences the travel behavior of genderdiverse and transgender people and how these experiences influence their subjective wellbeing when making trips in Portland, Oregon. Traditional one-on-one interviews were conducted in conjunction with allowing the interviewees to produce art as a non-verbal form of expression and communication of their experiences making trips in …

Profiles Of Family Engagement In Head Start, Elizabeth Jane Tremaine

Dissertations and Theses

Families of young children are active participants in their child's transition to kindergarten. Head Start is designed to facilitate families' engagement in their child's learning experiences (Head Start Parent, Family, and Community Engagement Framework, 2018). This study explores family engagement in Head Start, its changes across the transition into kindergarten, and its relation to children's development of social-emotional and executive function skills.

The current study addresses limitations of previous research by relying on family perspectives of family engagement, approaching family engagement as a developmental concept, and taking a person-centered analytic approach that accounts for the multi-dimensionality of family engagement. This …

Synthesis And Characterization Of Organometallic Polymers And Their Cytotoxicity Towards Human Cancer Cell Lines, Paul Peter Slawek

Electronic Theses and Dissertations

This research aimed to synthesize organometallic polymers from dialkyl (methyl, ethyl, butyl, cyclohexyl, and octyl) and diaryl (phenyl) tin dichlorides and three organic monomers, dipicolinic acid (DPA), chloramphenicol (CH), and isomannide (IS), using interfacial polymerization. Structure-activity relationships were investigated through physicochemical characterization (light-scattering photometry, proton NMR, and IR spectroscopy) and cytotoxicity was evaluated against six human cancer cell lines (AsPC-1, PANC-1, MCF-7, MDA-MB-231, HT-29, PC-3), with cisplatin serving as the reference standard.

Five DPA/tin polymers were synthesized, with IC₅₀ values in the range of 0.60–0.71 μg/mL. Their cytotoxicity was significantly lower than that of cisplatin (0.0023-0.044 μg/mL), suggesting that …

Implementation Of A Mixed Precision Iterative Solver On An Amd Apu, Saeyeon Kim, Henrik Evers

Computer Science and Engineering Senior Theses

Solving systems of linear equations is a core operation in high-performance computing and many scientific and engineering applications. One of the most widely used direct methods for solving such systems is LU factorization. Mixed-precision methods accelerate these solvers by using low-precision LU factorization with iterative refinement, improving performance and energy efficiency while preserving high numerical accuracy. AMD Accelerated Processing Units (APUs), which integrate CPU and NPU resources, provide an opportunity to explore this approach on emerging heterogeneous architectures. However, effective NPU utilization remains challenging due to workload partitioning, buffer management, data-movement overhead, and software tooling limitations.

This project implements a …

Thermovision 3d, Daniel Louie, Iker Mendiburu Perez, Kieran Greeley

Interdisciplinary Design Senior Theses

This project presents the development of a three-dimensional thermal mapping system designed to identify energy inefficiencies in buildings. By integrating visible-light imaging with thermal sensing, the system generates detailed 3D models that visualize both structural features and heat distribution. Using photogrammetry techniques, overlapping images are processed to reconstruct building geometry, while thermal data is mapped onto the model to highlight areas of potential heat loss such as insulation gaps, windows, and structural joints.

The system combines hardware and software components, including a dual-camera setup and a custom visualization pipeline, to produce both qualitative and quantitative outputs. Users are able to …

Does A Common Threat Unite?: Alliance Formation In East Asia Under Chinese Pressure, Sean G. Mcclellan

Honors Theses

The study explores whether a shared geopolitical threat fosters alliance formation among East Asian nations, focusing on Taiwan, Japan, and South Korea in the context of increasing Chinese influence. Integrating insights from international relations theory and social psychology—particularly Realistic Conflict Theory and the out-group unifying effect—the research evaluates whether perceived Chinese aggression corresponds with increased positive sentiment toward the United States. Utilizing data from the Asian Barometer Survey, linear regression analysis is conducted to assess how perceptions of Chinese and U.S. influence, democratic values, and political affiliation shape public attitudes. Results show that while negative views of Chinese and U.S. …

Extraction Of Key Themes In Online Health Discourse Using Unsupervised Learning And Large Language Models, Miranda G. Scully

Computer Science Senior Theses

Health online discussion boards are a modern platform that allow patients to interact with each other and the healthcare system as a whole, making them valuable sources of information for clinicians seeking to better anticipate treatment experiences and barriers. This study focuses on one such community, r/suboxone, a subreddit where patients using Suboxone share their experiences and ask questions. Our analysis is motivated by previous work that proposes event-based classification systems for such posts which buckets posts from r/suboxone into one or more of five high-level labels (Access Logistics, Co-Occurring Drug Usage, Medication for Opioid Use Disorder Administration, Psychophysical Effects, …

Rehabvr: A Virtual Reality System For Upper-Body Orthopaedic Physical Therapy Rehabilitation, Winnie Brenda Wanjiru Waiya

Computer Science Senior Theses

Physical therapy is a central component of rehabilitation for musculoskeletal conditions, yet adherence to prescribed treatment remains persistently poor. Jack et al. identified pain, boredom, and insufficient feedback as key barriers to treatment adherence in physiotherapy outpatient settings,¹ and Rucinski et al. confirmed that non-adherence rates in orthopaedic populations remain between 50 and 70%, with patients who disengage facing elevated risk of reoperation, progressive functional decline, and poor clinical outcomes.² According to the World Health Organization, approximately 1.71 billion people globally live with musculoskeletal conditions,³ with shoulder pain specifically carrying a community prevalence ranging from 0.67 to 55.2% worldwide and …

Community-Based Organization Leaders' Perceptions On Efforts To Promote Informal Learning Among Young Low-Income Readers, Virginia S. Rector

Walden Dissertations and Doctoral Studies

No abstract provided.

The Perspectives Of Lesbian, Gay, Bisexual, Transgender, Queer/Questioning, Plus (Others) Teachers On The Enactment Of Their Identities At Work Amid Adverse Legislation, Mandy Rhea Manning

Walden Dissertations and Doctoral Studies

No abstract provided.

Case Study Answers Are Not Elementary: How A Positive Outlier K-5 School Beat The Odds, Douglas Aaron Ferguson

Education Dissertations

There are a limited number of case studies of positive outlier elementary schools, otherwise known as schools that are beating the odds, and more of such studies are needed in order to effectively replicate positive problem-solving solutions. Positive outlier schools and districts, the focus of this dissertation, are those that score significantly above demographically similar schools and districts on standardized state testing. For example, none of the existing case studies highlight organizational culture as a key factor despite the fact that many of the more targeted topically focused studies cite school culture as a top factor. Additionally, the longest running …

Uncovering Dkk1 As A Therapeutically Relevant Target In Aggressive Er+ Breast Cancer Using A Novel Antiestrogen, Kristen Young

Dissertations

Over 70 percent of breast cancers are estrogen receptor-positive (ERα+), meaning that the hormone estrogen drives tumor growth. Although first-line targeted therapies that directly block ERα from hormone-dependent pathologies are initially effective, almost half of patients ultimately progress. These patients show high mutational rates to the ESR1 gene that encodes for ERα. A hotspot missense tyrosine to serine mutation at position 537 (Y537S) initiates hormone-independent, allele-specific transcriptional programs that increase metastasis. While next-generation ERα-targeted therapies show promise, benefits are often limited compared to standard-of-care. Understanding the mechanisms of action used by the Y537S ESR1 breast cancer cells to evade therapeutic …

Discovery Of Bmi-Associated Gut Microbiome Signatures In The Awi-Gen 2 Cohort, Meriem Yagoubi

Theses and Dissertations

Obesity is increasing across sub-Saharan Africa amid rapid dietary, environmental, and urbanization transitions, yet the gut microbiome features associated with adiposity in African populations remain under-characterized. This study investigated whether species-level gut microbiome composition is associated with body mass index (BMI) in the AWI-Gen 2 cohort, and whether BMI-associated microbial signals remain detectable after accounting for the dominant geographic structure of the microbiome. Gut microbiome community structure and diversity were characterized across 1,665 participants, and differential abundance analysis was used to identify taxa associated with BMI after controlling for study site. Machine learning models were then trained to assess how …

Entre La Lucha: Familismo And Well-Being Of Latino Immigrant Families Navigating Manual Labor And Anti-Immigrant Sentiment, Faviola Robles Saenz

Dissertations and Theses

The United States' history of treatment toward Latino immigrants has been shaped by anti-immigrant sentiment and exploitative labor practices, creating psychological violence that harms their families' well-being. Although previous research has examined anti-immigrant sentiment, labor conditions, and familismo among Latinos, these areas are often studied in isolation, with limited attention to their intersections and how they are experienced across generations. Informed by history, prior research, and my lived experiences, this study qualitatively explored the intersections of anti-immigrant sentiment and parents' manual labor to understand how these contexts shape familismo and well-being among Latino immigrant families. This work was grounded in …

Acceptance Of Shared Autonomous Vehicles: Exploring The Attitudes And Perspectives Of Older Adults, Sara Sohaee Urbina

Dissertations and Theses

The fast development of autonomous vehicle systems will create major changes in how people move around. Previous research shows that these technologies can benefit older people who struggle with mobility, safety and access to transportation. Shared Autonomous Vehicles (SAVs) enable older people to achieve self-reliance while obtaining essential services which enhance their quality of living. The successful deployment of SAVs requires users to accept this new technology which they must also be willing to use. This research study investigates which elements affect older adults to adopt SAVs by using an extended Technology Acceptance Model (TAM) framework.

The research design of …

Ambivalence, Foremourning, And Displacement In The German Translation Of Marie Bonaparte's Topsy, Kooper Wilson

University Honors Theses

This paper offers a reading of Sigmund Freud’s German translation of Marie Bonaparte’s book, Topsy: The Golden-Haired Chow, in which the author attempts to both delay the death of her dog and mourn it in advance through what I call foremourning. I argue that the manifest subject matter of Topsy should not be interpreted away as a projection of merely human concerns, but rather that close attention to Freud’s translation introduces themes from his analytic experience which engender an appreciation of Topsy’s atopia (intractability). I draw from recent psychoanalytic theory, literary criticism, and deconstruction, especially Jacques Derrida’s seminars …

Foundations' Deep, Emily Williams, Morgan Williams

University Honors Theses

Most historic buildings do not survive as they were built, yet preservation frameworks still tend to evaluate them as if they did.

Foundations' Deep begins with a structure located in Helena, Montana 59602, a building that sits uneasily within the categories it has been asked to meet. Built in the early twentieth century, it has persisted through alteration, abandonment, and use. What remains is not a stable artifact but a record of accumulated decisions, some careful and many indifferent, now embedded in the fabric of the building itself.

The thesis grows from this condition and from the limits of the …

Office Discipline Referral Narratives, Context, And Categorization, Deanna M. Bush

Education Dissertations

This two-part qualitative study examined the experiences of students with disabilities (SWD) in the middle school discipline. Phase one was a qualitative document analysis study that examined school discipline for SWD through the lens of Critical Disability Theory (CDT), Multi-Tiered Systems of Support (MTSS), Constructivist Learning Theory, and the Vulnerable Decision Point model (VDP) in a midsize suburban district in Washington state. The study explored alignment of ODR teacher-written narratives with behavioral categories assigned to the ODR at the time of issue to determine variance based on behavior category or student disability status. Phase two a semi-structured interview (shown on …

Synthesis And Characterization Of Synergistic Bioactive– Organometallic Condensation Polymers, Francesca Isabel Mosca

Electronic Theses and Dissertations

This research focuses on the synthesis and structural characterization of polymers with anticipated anticancer and antiviral properties by combining metal-containing Lewis acids, organotin dichlorides (R2SnCl2), Group 4 metallocene dichlorides (Cp2TiCl2, Cp2ZrCl2 and Cp2HfCl2), and triphenyl Group 15 metal dichlorides (Ph3AsCl2, Ph3SbCl2 and Ph3BiCl2), with biologically active Lewis bases, lamivudine, a synthetic nucleoside, and camphoric acid, a dicarboxylic acid, to achieve synergistic effect.

Five classes of polymers were synthesized using interfacial polymerization: lamivudine and organotin dichlorides, lamivudine and Group 4 metallocene dichlorides, camphoric acid and triphenyl Group 15 metal dichlorides, camphoric acid and organotin dichlorides, and camphoric acid and Group 4 …

Diversification Of Ghost Electric Fishes (Gymnotiformes, Apteronotidae) In Tropical South America: How Traits And Environmental Factors Constrain Macroevolutionary Diversification, Jonathan Gifford Allen

Doctoral Dissertations

Neotropical electric fishes (Apteronotidae) display remarkable phenotypic and ecological diversity, offering an exceptional system for studying macroevolutionary processes in freshwater environments. Here I investigate the morphological, ecological, and historical factors shaping diversification in the clade Navajini, with a focus on craniofacial evolution, species delimitation, and biogeographic patterns. First, using high-resolution micro-CT scans, 3D geometric morphometrics, and phylogenetic comparative methods, I analyze skull shape variation across Navajini. Key traits resulting from heterocephaly exhibit strong phylogenetic signal and reflect functional differentiation among genera. Sexual dimorphism contributes significantly to cranial disparity in some lineages, while others show conserved, modular patterns likely tied to …

Blended Family Dynamics And Executive Functioning In Preschoolers: A Cross-Sectional Study, Kayla Butler

Walden Dissertations and Doctoral Studies

No abstract provided.