Digital Commons Network^™

Ecological Drivers And Temporal Dynamics Of Daphnia In A Diverse Environmental And Spatial Landscape, Crysta A. Gantz

Dissertations and Theses

In the modern era, commonly referred to as the Anthropocene, human-caused changes to the environment are prevalent and complex. The study of impacts to biodiversity and ecosystem functioning requires multi-faceted approaches that encompass scales of organization from genes to ecosystems. It is often difficult to tease apart whether species responses to environmental change are due to phenotypic plasticity or genotypic variation. Therefore, it is important to try to understand where variation originated, that is, to link a phenotypic response to a genetic change or to gauge whether the response is from the environment. In addition, neutral genetic variation arising from …

Towards Scalable Schema Mapping Using Large Language Models, Christopher Buss, Mahdis Safari, Arash Termehchy, David Maier, Stefan Lee

Computer Science Faculty Publications and Presentations

The growing need to integrate information from many diverse sources poses significant scalability challenges for data integration systems. These systems often rely on manually written schema mappings, which are complex and costly to maintain. While recent advances suggest that large language models (LLMs) can assist in automating schema mapping, key challenges remain. We motivate future research in schema mapping generation by highlighting key challenges, presenting a competitive bidirectional schema matching pipeline, and exploring the limitations of current methods for generating more complex mappings.

Evaluation Of Fano Resonance In Silver Nanotriangles And Complementary Triangular Apertures For Enhanced Refractive Index Sensing, Nabila Islam

Dissertations and Theses

This thesis presents a detailed investigation of plasmonic sensors based on silver (Ag) nanotriangles, focusing on the interaction of plasmonic mode with waveguide modes to achieve Fano resonance for enhanced refractive index sensitivity. For this purpose, Ag nanotriangles were chemically synthesized and were on indium tin oxide (ITO)-coated glass. The samples were illuminated with laser light of various wavelengths and polarization to excite surface plasmon in the nanotriangle. Observation and characterization of their plasmonic behavior was done experimentally using Photoemission Electron Microscopy (PEEM). Numerical simulations using the Finite Element Method (FEM) were performed that agreed with these experimental results and …

Design And Evaluation Of An Electromagnetic Band Gap Structure For Self-Interference Reduction In Mmwave Full-Duplex Systems, Adewale Kehinde Oladeinde

Dissertations and Theses

Full-duplex (FD) wireless is a new technology that allows a device to transmit and receive at the same time and on the same frequency band. It has the potential to double the capacity and spectral efficiency of a wireless link compared to the family of conventional half-duplex wireless systems. The key challenge in implementing FD wireless communication is self-interference (SI): a node's transmitting signal generates significant interference to its receiver. Several previous studies have demonstrated the potential to reduce SI and develop FD radios; however, these studies are mostly limited to sub-6 GHz systems. Previous and on-going research explored various …

Multi-Sensor Remote Sensing Captures Geometry And Slow-To-Fast Sliding Transition Of The 2017 Mud Creek Landslide, Alexander L. Handwerger, Pascal Lacroix, Andrew F. Bell, Adam M. Booth, Mong-Han Huang, Simon M. Mudd, Roland Bürgmann, Eric J. Fielding

Geology Faculty Publications and Presentations

Landslides pose a significant hazard worldwide. Despite advances in landslide monitoring, predicting their size, timing, and location remains a major challenge. We revisit the 2017 Mud Creek landslide in California using radar interferometry, pixel tracking, and elevation change measurements from satellite and airborne radar, lidar, and optical data. Our analysis shows that pixel tracking of optical imagery captured the transition from slow motion to runaway acceleration starting ~ 1 month before catastrophic failure—an acceleration undetected by satellite InSAR alone. Strain rate maps revealed a new slip surface formed within the landslide body during acceleration, likely a key weakening mechanism. Failure …

Optimizing Boys' Motivation Over The Transition To Middle School: A Pattern-Centered Approach To Identifying Boys' Profiles Of Engagement And The Interpersonal Resources Important In Supporting Optimal Engagement Of Boys Across Sixth Grade, Brandy Anne Brennan

Dissertations and Theses

There are normative declines in student engagement during the transition to middle school, and studies indicate that these challenges may be especially problematic for boys. Given the limited empirical evidence offering ways to support boys' motivation, the main goal of this study was to understand ways we can help boys reach their full potential over the transition to middle school by examining the interpersonal resources from parents, teachers, and peers that sustain boys' optimal engagement across the first year of middle school. Using data from an existing longitudinal dataset of 191 sixth-grade boys (N = 366; 52% male) in …

Using The Epic (Exposure, Persuasion, Identification, And Commitment) To Develop A Measure Of Student Buy-In To Laboratory Learning Goals, Elizabeth Blanche Vaughan, A. Montoya-Cowan, Jack Barbera

Chemistry Faculty Publications and Presentations

Buy-in has been described as the series of judgements students make when deciding to engage with a pedagogical practice. Buy-in to pedagogical practices is known to have a meaningful impact on students’ engagement in learning environments, making it a construct of interest for researchers and practitioners. This study develops a measure of student buy-in to faculty defined laboratory learning goals by adapting an existing measure which operationalizes the construct in terms of Exposure, Persuasion, Identification, and Commitment (EPIC). The adapted measure presented in this study, deemed the EPIC-LaG (Laboratory Goals), was developed using learning goals for general and organic chemistry …

Defining Antisemitism Or Activism?: An Analysis Of Congressional Debate Over The Antisemitism Awareness Act Of 2023, John Carpenter

University Honors Theses

Introduced amid widespread campus protests against the Israeli militarys actions in the Gaza Strip, the Antisemitism Awareness Act of 2023 (AAA) directs the Department of Education to consider the International Holocaust Remembrance Alliance (IHRA) definition of antisemitism during investigations of potential discrimination under Title VI of the Civil Rights Act. This study investigates congressional debate on the AAA using the Discourse Historical Approach to Critical Discourse Analysis to assess how members of Congress portray the victims and perpetrators of antisemitism and whether these portrayals align with the stated aim to "improve safety and security for Jewish Communities." Findings reveal that …

Ronald E. Mcnair Scholars Program Profiles And Abstracts 2025, Mcnair Scholars Program

McNair Symposium

This publication provides research abstracts and biographies of 2025 McNair scholars and their mentors.

Ronald E. Mcnair Research Symposium Presentation Schedule 2025, Mcnair Scholars Program

McNair Symposium

This is the presentation schedule for the 23rd Undergraduate Ronald E. McNair Research Symposium 2025.

Voice As A Biomarker: Exploratory Analysis For Benign And Malignant Vocal Fold Lesions, Phillip Jenkins, Rylan Harrison, Steven Bedrick, Lisa Karstens, Bridge2ai-Voice Consortium

Mathematics and Statistics Faculty Publications and Presentations

Benign and malignant vocal fold lesions can alter voice quality and lead to significant morbidity or, in the case of malignancy, mortality. Early, noninvasive identification of these lesions using voice as a biomarker may improve diagnostic access and outcomes. In this study, we analyzed data from the initial release of the Bridge2AI-Voice dataset to evaluate which acoustic features best distinguish laryngeal cancer and benign vocal fold lesions from other vocal pathologies and healthy voice function. Seven diagnostic cohorts were grouped into two analyses: the first included participants with laryngeal cancer, benign lesions, or no voice disorder; the second included those …

Overcoming Challenges In Mapping Hydrography And Heterogeneity In Urban Landscapes, Kristina G. Hopkins, Rebecca L. Hale, Krista A. Capps, John S. Kominoski, Jennifer L. Morse, Allison H. Roy, Andrew Blinn, Shuo Chen, Liz Ortiz Munoz, Annika Quick, Jacob Rudolph

Environmental Science and Management Faculty Publications and Presentations

Understanding how water moves through a watershed is one of the most fundamental yet often complicated aspects of hydrology, especially in urban areas. Urban infrastructure and water management alter natural hydrological pathways in developed watersheds, which can violate assumptions of a watershed approach to ecosystem science. We focus on two aspects of urban landscapes that often create challenges to model watershed processes within and among urban areas: (1) accurate delineation of urban flow paths and (2) consistent characterisation of the urban landscape within and among cities. Here, we describe these challenges and identify how certain components of these challenges can …

Urban Wildlife In Your Backyard: Community Experiences With Coyotes And Outdoor Cats, Clarissa Emma Cressotti

Dissertations and Theses

Urbanization reshapes ecological processes by fragmenting habitat and altering patterns of human-wildlife interaction, often reducing biodiversity. However, at the household scale, residential yards can either enhance or inhibit ecological connectivity - functioning as informal habitat stepping stones or barriers to wildlife. This thesis examines how residents' environmental attitudes, wildlife experiences, and socio-demographic characteristics influence yard-level behaviors and shape the presence of urban-adapted wildlife species, particularly coyotes and domestic cats, across the Portland, Oregon metropolitan region. A mixed-methods, social-ecological framework guided the analysis, integrating survey data from 244 households with wildlife detections from motion-triggered cameras (Urban Wildlife Information Network, UWIN), citizen …

More Than A Ramp: Rethinking School Design For Sensory And Cognitive Inclusion, Andrew Ho

University Honors Theses

This thesis advocates for the integration of the ASPECTSS framework, developed by Magda Mostafa, into legislative standards that would govern the design of educational environments that accommodate students with Autism Spectrum Disorder (ASD). Drawing on evidence from a case study demonstrating significant improvements in student behavior and overall satisfaction through ASPECTSS-based interventions, the thesis highlights the urgent need for these principles to move beyond voluntary adoption and rather, toward enforceable design mandates.

The ASPECTSS framework includes the seven following criterias; Acoustics, Spatial Sequencing, Escape Spaces, Compartmentalization, Transitions, Sensory Zoning, and Safety. This model provides a comprehensive and actionable approach to …

We Who Are Not Cared For: Social Death, The Lie Of Educational Equity, And A Radical Replanting Praxis, Chantell Wesley

University Honors Theses

This thesis examines how the concept of social death, as theorized by Orlando Patterson and expanded by Frank B. Wilderson III and Christina Sharpe, can serve as a transformative foundation for culturally informed care practices within academic institutions. Arguing that traditional equity efforts and even critical race interventions often fall short by focusing on reform within inherently anti-Black systems, I propose a new framework: Radical Replanting Praxis. Using the metaphor of education as a tree, this praxis calls for a shift in attention from reforming institutional "roots" to transforming the "soil"--the relational, ideological, and everyday conditions in which …

A Groundwater Flow System Investigation In The Upper Rowena Creek Drainage, Oregon, Catelee Yamei Kambur

Dissertations and Theses

Groundwater level declines are a growing concern within the upper Rowena Creek drainage, Oregon. This area is home to a small community located on the upper limb of the Columbia Hills anticline, where local residents rely on aquifers within the Columbia River Basalt Group (CRBG) for domestic water supplies. Groundwater level declines in CRBG aquifers have been studied more extensively in the Mosier area, which lies approximately 5 miles to the northwest of Rowena, but there has been little research conducted specifically on the upper Rowena Creek drainage area. Rowena is located higher up the dip of the Columbia Hills …

Imputation Via Domain Adaptation: Rethinking Variable Subset Forecasting From Knowledge Transfer, Runchang Liang, Qi Hao, Yue Gao, Kunpeng Liu, Lu Jiang, Pengyang Wang, Minghao Yin

Computer Science Faculty Publications and Presentations

Multivariate time series forecasting in practical deployment faces a critical challenge termed Variable Subset Forecasting (VSF), where certain variables accessible during training are entirely missing during inference. This creates a stark discrepancy between the training (source domain with full variables) and inference (target domain with partial variables) environments, disrupting cross-variable dependencies and fragmenting global temporal patterns. Existing imputation methods, limited to transferring local knowledge (e.g., temporal neighbors or pairwise correlations), fail to capture essential global dynamics, leading to severe performance degradation under distribution shifts. To address these challenges, we redefine VSF as a cross-domain knowledge transfer problem and propose VIDA, …

Physical And Mental Health Of Behavioural Health Certified Peer Specialists In Four Us States, Judith A. Cook, Jane K. Burke-Miller, Morgan Pelot, Jessica A. Jonikas, Laysha Ostrow

Psychology Faculty Publications and Presentations

Background:

Little is known about the health and healthcare needs of the behavioural health peer specialist workforce in the USA. This study explored the physical and mental health-related quality of life (QOL) of a US multistate cohort of certified peer specialists, and factors associated with health-related work absences among those employed in peer specialist positions.

Methods:

Data come from 419 participants surveyed 18 months after state certification as part of a 2-year longitudinal cohort study of peer specialists in four US states. Measures included the Veterans RAND 12 Item Health Survey, the Epidemic-Pandemic Impacts Inventory and items from the National …

Impact Of Firefighters' Work Schedule On Cardiovascular Disease Risk, Wellbeing And Safety In Firefighters: Protocol For The Swift Study, A Multidisciplinary Prospective And Cross-Sectional Study, Walaa F. Abdelmoaty, Shelby L. Watkins, Aanuoluwakiitan Ayeni, David A. Hurtado, Andrew W. Mchill, Jeremy J. Biggs, Kurt T. Hegmann, Steven A. Shea, Todd Bodner, Nicole P. Bowles

Psychology Faculty Publications and Presentations

Firefighters face frequent physical and psychosocial stressors, increasing their risk for hypertension. Rising call volumes with a stable workforce have heightened occupational burdens. To meet their occupational demands while increasing time off-duty, fire departments across the country have switched from a 24 hours on 48 hours off (termed ‘24/48’) work schedule to one that increases the number of consecutive days off (eg, 1 day on, 3 days off, 2 days on, 3 days off (termed ‘1/3/2/3’) or 48 hours on 96 hours off (termed ‘48/96’)). However, these schedule changes come at the expense of increasing time on-duty, which may have …

Assessing The Accessibility Of Queer Romance Book Covers As Digital Thumbnails: An Analysis Of Color Contrast, Colorblind Safety, And Typography Legibility, Madelynn Sare

Book Publishing Final Research Papers

This research investigates the digital accessibility of queer romance book covers displayed as thumbnails online, focusing on the balance between creative freedom, genre appeal, and inclusive cover design. Using a dataset of 100 highest-rated queer romance titles from Goodreads (2020–2024), the study evaluates accessibility by examining color contrast ratios against Web Content Accessibility Guidelines (WCAG) standards, assessing colorblind safe design with Adobe Color, and measuring typography legibility through a custom-developed scale. Findings reveal that many covers fall short of WCAG color contrast requirements, yet a majority are colorblind safe, indicating that relatively minor design adjustments can significantly improve digital accessibility …

Guided Modes Through The Dual Perspectives Of Geometrical Optics And Wave Equation, Mason Spears

Mathematics and Statistics Undergraduate Departmental Honors Theses

In an optical waveguide, only finitely many electric field intensity profiles travel without loss, and these are aptly named guided modes. This paper uses fundamental concepts from the two paradigms of interpreting light, geometrical and physical optics, to derive guided modes axiomatically. First, basic principles of geometrical optics are demonstrated in a slab waveguide to explain characteristics of optical waveguides such as total internal reflection and numerical aperture. Dispersion curves are assembled from the same principles and used to show that only finitely many guided modes exist for a given waveguide. Next, Maxwell’s equations are used to derive the famous …

Sabin Cdc Affordable Infill Initiative, Andrew Lindstrom, Casey Dobbert, Josh Miller, Laura Fleming, Menodora Roos-Lemaster, Nick Flowers

Master of Urban and Regional Planning Workshop Projects

Grounded Growth Planning Cooperative partnered with Sabin Community Development Corporation (CDC), a non-profit affordable housing developer in North/Northeast Portland. The project goal was to examine 11 sites in their Scattered Sites Portfolio for the possibility of infill development to increase the portfolio’s financial performance and to provide additional housing to individuals with intellectual and developmental disabilities (IDD). Accessory Dwelling Units (ADUs) were the primary focus of the evaluation, as they can be constructed without modifying the existing housing and displacing existing tenants. The report identifies opportunities for Sabin CDC to take advantage of Portland zoning code changes that allow increased …

What's The Value Of A State? Accounting For The Ecosystem Services And Natural Capital Of Oregon, Kathryn Liebrecht

University Honors Theses

Ecosystem services are vital to human welfare and society, but often are overlooked when it comes to planning and setting policy. By neglecting to incorporate the benefits received from natural resources, policy makers may unknowingly be making decisions that harm the long term sustainability and use of these services. To highlight the importance of Oregon's ecosystems, the present study aims to provide a full accounting of the ecosystem services and natural capital of the state. Using data from the Institute for Natural Resources' updated Oregon statewide habitat map, Oregon's ecosystems were matched to biome categories from the Ecosystem Services Valuation …

An Exploration Of The Structure Of The Linear Algebraic Model Of Color, Isaac Martin

University Honors Theses

This thesis surveys the mathematical grounding of linear algebraic models of color. It aims to build from the ground up the framework by which additive color is broadly understood in the digital age. Primarily building on the work of Jozef Cohen, Eric Dubois, David H. Krantz, and Günter Wyszecki, it aims to chart the construction of a model of color that underpins most modern understandings of color. While the construction is certainly established in colorimetric circles, the construction is, in the thesis author's opinion, either obtuse or non-rigorous. Ideally, this thesis serves to make the construction accessible to an audience …

Psilocybin And Death Anxiety: A Dual-Mechanism Approach To Existential Distress, Annabelle Swain

University Honors Theses

This literature review looks at how psilocybin, the active compound in "magic mushrooms," can help people deal with death anxiety; the deep fear of dying or losing control that shows up in lots of mental health struggles. While traditional treatments like SSRIs and talk therapy work for some people, they don't always get to the root of the problem. Psilocybin works differently. It changes brain activity, especially in networks tied to repetitive, self-focused thinking, as well as creates powerful, emotional experiences that help people rethink how they see life and death. This paper covers recent research showing how one or …

Honoring Childhood Agency In Developmental Research: Best Practices, Applications, And Insights, Amanda N. Howery, Olivia J. Lashley, Hanna R. Wright, Julia L. Williams, Olivia K. Nomura, Eline Lenne, Elizabeth K. Wood, Hanna C. Gustafsson, Elinor L. Sullivan

School of Social Work Faculty Publications and Presentations

Pediatric research requires caregivers to provide informed consent on behalf of their children. While not a formal requirement for children under the age of seven, it is important to involve child participants in the assent and decision-making processes in developmentally appropriate ways. This is especially important in longitudinal research, where the extent to which a developing child understands study tasks evolves over time. Although there is consensus that assent procedures are important and necessary, limited resources synthesizing strategies for pediatric researchers to encourage positive and respectful research experiences for young children exist. We describe methods used in an ongoing longitudinal …

State Of The Climate In 2024: The Arctic, R. L. Thoman, T. A. Moon, M. L. Druckenmiller, Thomas G. Askjaer, Thomas J. Ballinger, Uma S. Bhatt, Logan T. Berner, Germar H. Bernhard, Siiri Bigalke, Jarle W. Bjerke, Multiple Additional Authors

Geography Faculty Publications and Presentations

The Arctic environment in 2024 continued on a trajectory that has put it in a state far different from that of the twentieth century. Ongoing accumulation of greenhouse gases in the atmosphere continues to quickly warm the Arctic, resulting in rapid changes in the cryosphere that are driving cascading impacts to climate, ecological, and societal systems.

Teaching With The Electronic Literature Collection Volume 4, Rui Torres, Kathi Inman Berens, Maria C. Zamora, Lyle Skains, John Murray

English Faculty Publications and Presentations

This article surveys the four ELCs – Electronic Literature Collections (2006- 2022), reviews pedagogical approaches to teaching ELCs, and situates ELCs and electronic literature pedagogy into higher education’s course management systems. ELCs’ increasing accessibility serves its global audience and centers the ethical values of diversity, equality, and inclusion. The ELC4’s user experience design manifests these values. The article discusses the history of the Collections’ experience design. Volume Four (2022) expanded reader accessibility and linguistic diversity by including video playthroughs and collecting 132 works from 42 author nationalities in 31 languages. This article surveys those evolving design changes. It engages a …

Analyzing National War Propaganda Through Comparison Of Diverse Case Studies, Ike Sugitani

Dissertations and Theses

In the build-up to war, national governments utilize propaganda to gather public support for the war effort. In some instances, propaganda campaigns are conducted but war does not occur. This begs the question as to why war follows propaganda campaigns in some cases, but not in others. I argue that propaganda efforts that lead to war can be generally characterized through three major strategies based on a patriotic participatory social structure, a claim to moral authority, and the blending of individual concepts of the state, government and nation. In this study, I analyze the major historical case studies of the …

Effects Of Mating System And Adaptedness On The Evolution Of Fitness And Mtdna Copy Number In Mitonuclear Mismatched C. Elegans, Zachary P. Dietz, Devshuvam Banerji, Jennifer A. Sullins, Brent W. Bever, Stephen F. Christy, Ulfar Bergthorsson, Vaishali Katju, Suzanne Estes

Biology Faculty Publications and Presentations

Metabolic functioning in nearly all eukaryotes relies on molecular machinery dual-encoded by mitochondrial DNA (mtDNA) and nuclear DNA (nDNA) genomes. The two genomes have sustained an extraordinary degree of cooperation across evolutionary time, preserving the capacity for indispensable processes including oxidative phosphorylation and ATP production, which in turn influence many fitness-related traits. How this cooperation is maintained when one member of the pair is debilitated by deleterious mutation is poorly understood, as is the influence of mutation location (mtDNA or nDNA), mating system, or the potentially compensatory effects of mtDNA copy number changes on the process. We asked whether and …