Digital Commons Network^™

Custom Sbc Gps Tracking And Geocaching Carputer Software Development And Implementation, Joshua A. Davis

University Honors Theses

This thesis argues that hardware-integrated capstone projects develop software engineering skills that traditional coursework cannot replicate. A team of eight developers built a GPS tracking system on a Raspberry Pi 4 over two academic terms, integrating real-time position streaming, the APRS amateur radio protocol for network-independent location sharing, and PostGIS spatial queries for "new road" detection. The system implements SmartBeaconing for adaptive GPS data reduction, achieving approximately 80% storage savings while preserving route fidelity. The project exposed challenges absent from classroom assignments: hardware debugging without stack traces, cross-layer integration failures, and coordination overhead when deploying to unfamiliar architecture; demonstrating that …

Brutalism, Bad Manners, And Tech Baddies: Strengthening Women's Sense Of Belonging In Undergraduate Computer Science Spaces, Mckenzie Starr West

University Honors Theses

Through a literature review supported by reflexive vignettes, this thesis explores women's experiences in undergraduate CS programs and how physical and discursive spaces may affect their sense of belonging and shape whether they enter, remain in, or leave CS programs. I provide historical and cultural context for undergraduate CS, including the history of women in education and the continued underrepresentation of women in CS compared to many other STEM fields. Using physical and discursive spaces as a lens, I examine how classrooms, study spaces, department communications, online forums, and other CS-related environments may signal who belongs, who is valued, and …

Adaptive Design Strategies For A Dual-Shaft Pvc Shredder, Gavin Balderas

University Honors Theses

This capstone project involved the design and development of a mid-size plastic shredder, created to process strong, ductile PVC sheets up to ½" thick. This application falls between the capabilities of consumer grade plastic shredders and heavy-duty industrial machines. Over 400 million tons of plastic produced annually and less than 10% of it is recycled; there is an ever-growing need for plastic recycling accessibility and infrastructure. This project aimed to create a compact dual-shaft shredder that can shred thick PVC sheets while being powered by a 120V outlet. Research into blade geometry and orientations aided an iterative design process driven …

Effects Of Changing Fire Regimes On Black Huckleberry Habitat Suitability, Emily Labarge

University Honors Theses

Black huckleberries are a significant cultural, ecological, and economic species in the Pacific Northwest. Historically, black huckleberries were tended with cultural fire by Indigenous peoples, and now also hold importance as a resource in the non-timber forest product economy. Research has begun on the impacts of climate change on suitable black huckleberry habitat and on changing fire regimes, but not in relation to each other. To address this gap, I examined the area of overlap between suitable black huckleberry habitat and fire burn probability into mid-century climate projections. I determined the current ownership entities with management jurisdiction in areas with …

Rapid-Prototyping Nanofabrication: Lcd-Based Projection Lithography And Physical Vapor Deposition, Sabeel Saleem Mohammmed

University Honors Theses

The semiconductor industry's continued growth, driven in large part by demand for artificial intelligence hardware, has highlighted the need for greater workforce development in regions adjacent to major fabrication centers like Oregon's Silicon Forest. This capstone project lays the groundwork for a small scale and student led semiconductor fabrication lab at Portland State University by demonstrating two of the core steps in chip manufacturing: photolithography and thin film deposition. Rather than relying on conventional fixed reticles, this work explores a unique, low cost approach to patterning that uses an ultraviolet-compatible liquid crystal display (LCD) as a programmable reticle, allowing arbitrary …

Trans And Gender Diverse Experiences With Healthcare Professionals, Victor N. Soto

University Honors Theses

There is a history of state powers working against the interest of Transgender and Gender Diverse (TGD) people, but since the second Trump election attacks on TGD have reached a new precedent; this suggests the state is engaging in necropolitical actions to gain and maintain power. To better understand how the current climate is impacting TGD people, and add to discussions about TGD-centered healthcare research, this thesis interviewed 15 TGD students from the Portland metro area about their experiences with healthcare providers. All fifteen of the interviews were transcribed and coded. Four primary themes were found: 1) bad provider experience; …

A Novel, Embedding-Based Approach To Longitudinal Survey Data Imputation, Julia Rezvani

University Honors Theses

Longitudinal surveys are ubiquitous in the social sciences as a means of tracking changes in behavior and opinions with time and identifying potential causal mechanisms. These surveys are frequently plagued by missing data and semantic drift, both of which limit their effectiveness and scientific utility. Imputation algorithms allow researchers to fill gaps in collected survey datasets, imperfectly reconstructing lost data. Although deep learning algorithms have been used in imputation to great success, approaches which simultaneously leverage the semantic and temporal structure of longitudinal surveys have not yet been developed. We propose a novel imputation architecture which is capable of leveraging …

Navigating Filipino-American Identity Through Philippine Foodways, Jenelle Kirsten De Leon

University Honors Theses

This thesis examines the complexity of Filipino-American identity and investigates how Philippine foodways can function as a meaningful pathway for cultural understanding, identity formation, and intergenerational connection. Shaped by colonization, cultural hybridity, generational divides, and limited representation in Western education and media, Filipino-American identity is often difficult to define and navigate, leaving many individuals without accessible entry points to explore their culture, history, traditions, and more.

Through an analysis of existing literature, primary research, and a survey of Filipino-American youth, this study finds that Filipino cuisine operates as a powerful site of cultural and historical knowledge. The narratives embedded within …

Characteristics Of Social Capital In Informal Housing Settlements, Lena Parsons

University Honors Theses

Many cities see growth of informal housing settlements as urban populations rise across the globe. Residents of informal settlements are observed to use robust networks of social capital to support themselves in an environment of resource scarcity and marginalization. This review synthesizes research examining characteristics of social capital in informal housing settlements, finding that (1) social capital influences residents' acquisition of basic needs, (2) the structure of social capital networks depend on the context of the settlement, and (3) the built environment of informal settlements has a cyclical relationship to their social capital networks. This synthesis concludes that formal solutions …

Staging Reception / Perception: Transhistorical Bi-Directional Dialogues Between Etruscan Visual Cultural Objects And Giuseppe Penone's Contemporary Sculptures, Shelby Morgan

University Honors Theses

I use the occasion of the March 2024 exhibit,"Vulci. Goods for Mankind. Goods for Gods." at Milan's Luigi Rovati Foundation to consider how the museum's staging of Etruscan visual material cultural objects and contemporary sculptures by Italian artist Giuseppe Penone prompts viewers to perceive transhistorical bi-directional dialogues between the viewer and material culture as well as between the ancient and contemporary objects themselves.

Via a close reading of the exhibition while leveraging the three frameworks of aura, imprint and classical reception I analyze how the staging of the hypogeum creates a place of atmosphere. I argue this is done through …

Projected Climate Change Impacts On Soil Greenhouse Gas Emissions From A Restored Freshwater Marsh, Annika Hendrickson

University Honors Theses

Wetlands provide valuable ecosystem services, one of which is a wetlands ability to sequester carbon. Climate change and human land use threaten a wetlands ability to do so. Globally, 21% of wetlands have been lost since the 1700s. As a result, restoration of wetlands has been increasing. However, wetlands in the process of restoration emit more methane than degraded ones, and as the climate continues to change, these fluxes could respond. Projected sea level rise is expected to cause salt water to infiltrate coastal freshwater systems, increasing the salinity. Past research has found that increased salinity has led to suppressed …

Healthcare Access Challenges Among Asian Americans, Phyo Theingi

University Honors Theses

Asian Americans are the fastest growing racial ethnic group in the U.S. According to the 2023 U.S. Census Bureau population estimate, Asian Americans account for 25.2 million (or 7.4%) of the nation's population. Asian Americans are not a monolith and represent a diversity of rich histories, cultures, languages and ethnicities. According to research conducted by the Pew Research Center, most Asian Americans face discrimination of some kind, including being treated as a foreigner in the U.S and being stereotyped as a model minority. They also experience health care access barriers. Research found that Asian Americans face barriers related to language …

Uniform Stability Of Katyusha In Strongly-Convex Settings, Don Li

University Honors Theses

Acceleration of convergence and reduction of variance constitute a trade-off in the design of stochastic optimization machine learning algorithms. Katyusha was introduced to address this trade-off, synthesizing Nesterov Accelerated Gradient (NAG) and Stochastic Variance-Reduced Gradient (SVRG) into a single first-order optimizer with promising empirical performance. However, the generalization properties of Katyusha remain largely unexplored. We conjecture that, in the smooth quadratic regime (i.e., under assumptions of strong convexity and smoothness of the loss function, and boundedness of gradients), Katyusha is uniformly stable in the sense of Bousquet and Elisseeff. Instantiating our framework for NAG, we extend the use of Lyapunov …

Seeing A Future Where I Exist As Myself: An Exploration Of Suicidality As A Response To Sociopolitical Oppression In Transgender And Gender Expansive Populations, Alexander Ray Sequoia

University Honors Theses

Suicide is often considered a mental health issue alone. For Transgender and gender non-conforming (TGNC) people, suicide can be a response to erasure of self and living under oppression conditions. The sociopolitical climate in the United States (U.S.), has become more hostile for TGNC people, along with legislative action that criminalizes their existence. This project explores the intersections of identity and nuances of suicide and death. The present study consists of 14 semi-structured interviews. This study examined the intersections of gender and culture on suicide responses, highlighting the importance of culturally relevant and community-led support for Transgender and gender expansive …

The Gut Microbiome, The Gut-Brain Axis, And College Student Well-Being, Idi Mckay

University Honors Theses

This literature review examines how diet, stress, environmental exposure, and food accessibility may influence college students' mental health and academic performance through the gut microbiome and the Gut-Brain Axis (GBA). Current microbiome research often focuses on early childhood development, clinical disease populations, or older adults, while overlooking college-age students who experience significant social, environmental, and biological transitions. College students frequently face food insecurity, irregular eating patterns, chronic stress, inconsistent sleep schedules, and reduced access to nutrient-dense foods, all of which may influence microbial diversity and overall gut health.

This thesis explores how modern campus environments and lifestyle factors may contribute …

The Good Knight, Elektra Koozer

University Honors Theses

The Good Knight is a comics adaptation of Sir Galahad's story through the lens of a queer retelling. This story focuses on queer relationships, struggling with depression and isolation, and death. It begins at the end of Galahad's life, where he is forced to question his legacy and who he is after completing the quest that has dictated his whole life. The story weaves through time, reflecting upon his past, thinking about his mother's expectations of him, being chosen for the grail quest, confronting his estranged father, and trying to cope with the world on his shoulders. He has to …

Oregon State Rank Assessment For Willamette Navarretia (Navarretia Willamettensis), Nora Dunkirk

Institute for Natural Resources Publications

Oregon state conservation status assessment for Willamette Navarretia (Navarretia willamettensis) using NatureServe methodology, 2026.

Adopting Critical Power Grid Infrastructure Technologies: An Organizational Cybersecurity Assessment Against Ransomware, Fayez Alsoubaie

Dissertations and Theses

For many years, researchers and practitioners have studied emerging technologies in field of energy production and distribution. Power grid systems carry major weights in the energy branch of the economy. Researchers and scientists have been interested in finding ways to connect the power grid gap and improve protection for its technologies.

The research supports organizational adoption and prioritization of critical cybersecurity technologies for ransomware protection in power grid infrastructure. As utilities increasingly integrate digital technologies, they become more vulnerable to sophisticated cyberattacks that can disrupt services and put public safety at risk. The main focus of the study is to …

How Do Us States Define Person-Centered And Family-Involved Care In Assisted Living Regulations, Paula Carder, Lindsey Smith, Jennifer N. Bunker, Cassandra L. Hua, Erh-Chi Hsu, Isabelle Boun, Olivia M. Ainsworth, Kali S. Thomas, Eric Jutkowitz

Institute on Aging Publications

Introduction: A large share of assisted living (AL) residents have a diagnosis of dementia or cognitive impairment, and these individuals can benefit from person-centered care and family-involved care. This study examines whether and how states’ AL licenses address these topics.MethodsThis research analyzed a national database of 249 unique licensing requirements that govern 35,602 ALs in all states and associated regulations, including those that govern memory care (MC) services. We reviewed each regulation for the presence of person-centered or family involved care and then used content analysis of license requirements with at least one relevant policy to identify key categories and …

The Method Of Periodic Averaging Applied To Reduced Coupled Mode Theory Models For Fiber Laser Amplifiers, Rebecca Nicole Bryant

Dissertations and Theses

Fiber laser amplifier (FLA) models are often implemented without rigorous mathematical justification or thorough numerical validation. Without a proper theoretical basis for assumptions and approximations, or a technical analysis of model performance, there is significant uncertainty about the limitations of any given reduced model and its suitability for an application. This research aims to address the lack of comprehensive assessment of FLA models by directly comparing distinct models and recommending a mathematical alternative to replace heuristic model-reduction techniques. The work in this dissertation is divided into two projects: a comparative study that uses existing FLA models to assess the validity …

Assessment Of The Readiness Of Architectural Design Companies To Adopt Eco-Friendly Nanotechnologies In Sustainable Building Design, Ashwaq Essa Al Khalil

Dissertations and Theses

Nanotechnology is emerging as a promising innovation in sustainable architectural design, although its adoption remains slow. Research highlights the advantages of incorporating nanotechnologies in architecture, including improved material performance, enhanced thermal efficiency, reduced energy consumption, improved durability, and progress toward the Sustainable Development Goals (SDGs). These advantages make nanomaterials a promising solution for sustainable building design, particularly in hot-climate regions where energy consumption and carbon emissions associated with conventional building design practices remain major concerns.

Despite this potential, nanotechnology adoption in architecture faces several challenges, including limited real-world applications, slow diffusion in practice, and persistent organizational, economic, and regulatory barriers. …

Aid And Assist Cases In Multnomah County: An Exploration Of Ors 161.370, Savannah Jurasek

Dissertations and Theses

Individuals with severe mental illness (SMI) are highly overrepresented in jails. In Oregon, these individuals can be eligible for what is referred to as the aid and assist process (ORS 161.370) which is designed to facilitate restorative care in efforts to ensure that vulnerable individuals can rationally participate in their criminal proceedings. However, continuous escalation in aid and assist orders (109.3% between 2011-2025) has led to strain on the Oregon State Hospital, the primary care facility for this population. As a consequence, defendants with SMI are spending unnecessary time in custody, despite hospitalization admission guidelines governed by previously decided case …

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 …

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 …

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 …

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 …

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 …

Growing Pains: The Loss Of Plasticity To Extreme Anoxia In Developing Embryos Of Austrofundulus Limnaeus, Patrick Ryan Clouser

Dissertations and Theses

Oxygen plays a pivotal role for most animal life on Earth, so much so that even short exposures to no oxygen, anoxia, can have severe effects on the animal's wellbeing. Conversely, aerobic recovery after anoxic insult can be just as detrimental. Some animals are the exception to this rule and demonstrate survival through anoxia and recovery. There has been a great deal of research around anoxia tolerant animals, but what remains unclear are the genetic underpinnings that determine the anoxia tolerant phenotype. RNA sequencing allows for the quantification of RNA transcripts within a sample, which can indicate if a gene …

Emotion-Focused Teaching And Preschool Children's Social, Emotional, And Self-Regulatory Development, Brielle Emily Petit

Dissertations and Theses

Contributing to the literature on supportive mechanisms for children's development of social, emotional, and self-regulatory competencies, the current study examines the contributions of emotion-focused teaching in preschool classrooms. Emotion-focused teaching is a framework used within preschool classrooms that encompasses three domains of teaching that support children's development of emotion skills—how teachers display their own emotions or emotion-related behaviors and actions (modeling), the ways they respond to children's emotional expressions (responding), and how instruction is used to inform children about emotions and related processes (instructing). More frequent emotion-focused teaching has been shown to be a …

Pieces Of The Pathway: A Qualitative Exploration Of Social Support For Individuals Navigating Houselessness, Desiree' Jane Duboise

Dissertations and Theses

Houselessness has long been an issue of pressing concern in the United States; and in Multnomah County, Oregon, approximately 10,526 people are experiencing houselessness. Social support has been identified as a critical factor in helping people navigate houselessness and will be explored in the current study. Specifically, the current study examines social support among populations with lived experience of houselessness as they navigate pathways through houselessness. The current study is situated within a broader study examining journeys through houselessness called the Pathways study, and it utilizes a subsample of individuals involved in the Pathways study. The Pathways study and the …