Digital Commons Network^™

Diverging Impacts Of Organizational Dei Practices: The Role Of Objective And Subjective Group Status, Julia Oberlin, Claudia Toma, Tessa L. Dover

Psychology Faculty Publications and Presentations

Purpose – While DEI practices aim to enhance the outcomes of disadvantaged groups, their impact remains uncertain, with disparities often persisting. This paper examines whether the accumulation of DEI practices helps reduce psychological and work disparities between employees, considering both their objective (e.g. gender and race) and subjective (or perceived) (dis)advantage.

Design/methodology/approach – Study 1 surveyed 602 employees to assess the impact of perceiving their organization as having many orfew DEI practices on theirsense ofinclusion and job satisfaction. Study 2 used an experimental design (N 5 739) to extend the findings of Study 1 by manipulating the number of DEI …

A Projector-Rank Partition Theorem For Exact Degrees Of Freedom In Experimental Design, K. G. Nagananda

Mathematics and Statistics Faculty Publications and Presentations

In many experimental designs—split-plots, blocked or nested layouts, fractional factorials, and studies with missing or unequal replication—standard ANOVA procedures no longer tell us exactly how many independent pieces of information each effect truly contributes. We provide a general degrees of freedom (df) partition theorem that resolves this ambiguity. For N observations, we show that the total information in the data (i.e., N −1 df) can be split exactly across experimental effects and randomization strata by projecting the data onto each stratum and counting the df each effect contributes there. This yields integer df—not approximations—for any mix of fixed and random …

Machine Learning Local Potentials For Accelerated Electron-Phonon Interactions Calculations Within The Projector Augmented-Wave Framework, Yi Xia

Mechanical and Materials Engineering Faculty Publications and Presentations

No abstract provided.

Lrq-Solver: A Transformer-Based Neural Operator For Fast And Accurate Solving Of Large-Scale 3d Pdes, Peijian Zeng, Guan Wang, Haohao Gu, Xiaoguang Hu, Tiezhu Gao, Zhuowei Wang, Aimin Yang, Xiaoyu Song

Electrical and Computer Engineering Faculty Publications and Presentations

Solving large-scale PDEs on complex three-dimensional geometries remains a central challenge in scientific and engineering computing, often due to expensive pre-processing stages and high computational overhead. We present Low-Rank Query-based PDE Solver (LRQ-Solver), a physics-integrated deep learning framework for efficient CAE simulations of complex three-dimensional geometries in CAD-driven design analysis. Built upon the Parameter-Conditioned Lagrangian Modeling (PCLM) that embeds physical consistency into the learning process and the Low-Rank Query Attention (LR-QA) module that reduces attention complexity from O(N2) to O(NC2+C3) via covariance decomposition, LRQ-Solver supports multi-configuration analysis within iterative design workflows. On two benchmark datasets, it achieves a 28.6% error …

Influence Of Particle Properties And Grain Size On Aggregation In Dry Particle-Laden Volcanic Jets, Md Miraz Hossain, Stephen A. Solovitz, Josef Dufek, Joshua S. Mendez Harper, Alexa R. Van Eaton, Mary C. Benage, Larry G. Mastin, Benjamin J. Andrews

Electrical and Computer Engineering Faculty Publications and Presentations

Explosive volcanic eruptions can inject large amounts of ash into the atmosphere. These suspended particles pose hazards to aircraft, so a better understanding of the ash residence time and transport distance is needed. Fine particles combine to form larger aggregates, altering their settling behavior. Ash aggregation is influenced by liquid bonding, electrostatic forces, and preferential concentration driven by turbulence. We examine particle aggregation through controlled, low-humidity experiments at similar particle-fluid scaling to conditions near a volcanic vent. Particle-laden jets used compressed air containing three types of particles at controlled mass loadings: hollow glass spheres (∼10 μm diameter), solid nickel spheres …

Xenoliths In Meteorites: Insights Into The Dynamics Of Material Exchange Between Asteroids, J. Gattacceca, B. Devouard, L. Bonal, Y. Marrocchi, A. Greshake, R. Tartese, M. Gounelle, D. Auyang, C. Sonzogni, M. Hutson, Multiple Additional Authors

School of Earth, Environment, and Society Faculty Publications and Presentations

A minor fraction of meteorites contains xenoliths, that is, clasts that were formed on a different parent body than that of the host lithology. The occurrence of xenoliths is direct evidence for the exchange of material between asteroids, including exchanges between asteroids from the carbonaceous (CC) and non-carbonaceous (NC) reservoirs. Overall xenolith population statistics may therefore inform us about the dynamical mixing of these two asteroid reservoirs. Xenoliths are also intrinsically interesting because they may sample parent bodies that are not represented in the meteorite collection. In this work, we conducted a critical and exhaustive review of xenoliths described in …

Measurements And Analysis Of Light Non-Methane Hydrocarbon Mole Fractions In 1982–1987 At Six Remote Sites Along The Pacific Rim, A. M. Smith, C. L. Butenhoff, M. A. K. Khalil, A. L. Rice

Physics Faculty Publications and Presentations

Atmospheric non‐methane hydrocarbons (NMHCs) are important trace species with anthropogenic and natural sources including fugitive emissions from fossil fuel mining and distribution, biomass burning, biofuel combustion, and biogenic emissions from microbes and plants. We present previously unpublished whole air sample measurements of NMHCs collected at approximately weekly intervals from 1982 to 1987 at six stations spanning the Northern and Southern hemispheres, which sampled primarily Pacific Basin air masses as determined by back‐trajectory analysis. The four alkanes in this data set, ethane, propane, i‐ and n‐butane had a mean measured mole fraction of 712 ± 22 ppt, 245 ± 13 ppt, …

Extensive Glacier Loss In The Coterminous United States, Andrew G. Fountain, Bryce Glenn, Christopher Mcneil, Brian Menounos

Geology Faculty Publications and Presentations

Glaciers populate the mountain ranges of the western conterminous United States and despite their importance to alpine hydrology, their area and volume change have never been comprehensively evaluated. Our study shows that since the mid-twentieth century about one-quarter of the glaciers have disappeared and the overall area and volume are reduced by one-third. The pattern of glacier shrinkage suggests most glaciers in the conterminous United States are largely maintained by local topographic influences due to their small size. These results improve our understanding of evolving high alpine hydrology and importance to ecosystem processes.

Editorial: Innovations In Dementia Policies And Services, Walter D. Dawson, Alison J. Canty, Joaquín Migeot, Laura O'Philbin, Sherril B. Gelmon

Institute on Aging Publications

There is an increasing global consensus that dementia is a significant public health issue (Chapman et al., 2006; Jackson et al., 2023; World Health Organization, 2017). As the global population ages and the number of people living with dementia increases, dementia will continue to grow in salience (Nichols, E., and GBD 2019 Dementia Forecasting Collaborators, 2022). The complexities associated with dementia require innovative approaches to the provision of care and support as well as to the design of service systems at local and national levels across the globe that can truly meet the unique needs of people living with dementia …

Representation Stability In The Intrinsic Hyperplane Arrangements Associated To Irreducible Representations Of The Symmetric Groups, Ian Flynn, Eric Ramos, Benjamin Young

Mathematics and Statistics Faculty Publications and Presentations

Some of the most classically relevant Hyperplane arrangements are the Braid Arrangements Bn and their associated compliment spaces Fn. In their recent work, Tsilevich, Vershik, and Yuzvinsky [TVY20] construct what they refer to as the intrinsic hyperplane arrangement within any irreducible representation of the symmetric group that generalize the classical braid arrangements. Through examples it is also shown that the associated compliment spaces to these intrinsic arrangements display behaviors far removed from Fn. In this work we study the intrinsic hyperplane arrangements of irreducible representations of the symmetric group from the perspective of representation stability. This work is both theoretical, …

Computational Study Of Irrational Rotations Via Exact Discontinuity Tracking: A New Experimental Framework, Hannah Kravitz

Mathematics and Statistics Faculty Publications and Presentations

We present an algorithm for studying the sum𝐺𝑁⁡(𝑥,𝜌)=𝑁∑𝑘=1[{𝑥+𝑘⁢𝜌}−12],

which is closely related to the discrepancy of the irrational rotation. Computation of𝐺𝑁and associated statistics is notoriously difficult due to numerical instability and the failure of sampling to capture the discontinuities. Our algorithm instead fully defines𝐺𝑁through its discontinuities, which allows computation of𝐺𝑁⁡(𝑥,𝜌)with errors on the order of𝑁times machine epsilon in𝑂⁡(𝑁)time for practical𝑁. The associated probability density function can then be computed in𝑂⁡(𝑁⁢log⁡𝑁)time. Presented as a tool for experimental mathematics, the algorithm enables reliable plots of the descriptive statistics of𝐺𝑁over𝑁, in particular the length of the support of the pdf (the discrepancy), revealing …

Factors Influencing Enterprise Adoption Of Ai-Enabled Computers: An Expert Judgment Quantification Approach Across Multiple Sectors, Yu Shan Su, Tugrul Daim, Chia-Hao Hung, Leong Chan, Dana Bakry

Engineering and Technology Management Faculty Publications and Presentations

This study examines the key factors influencing the adoption of Artificial Intelligence Personal Computers (AIPCs) by enterprises, exploring both the benefits and challenges of their business applications. As enterprises increasingly require real-time computing, autonomous decision-making, and improved cybersecurity, AIPC—combining artificial intelligence and edge computing—has become a strategic technology for boosting competitiveness. Particularly in scenarios with less reliance on cloud services, businesses are more likely to adopt devices with local processing and standalone AI capabilities to meet the dual needs of operational efficiency and data privacy. Through an extensive review of the literature, this study identifies four main dimensions and sixteen …

The Effects Of Pluss: Adapting An Evidence-Based Reading Intervention For Multilingual Learners, Amanda K. Sanford, Christopher J. Pinkney, Sheldon Loman, Julie Esparza Brown, Theresa Just, Kendall Flori, Camila Swift, Holly Ramstead

Educator Licensure Faculty Publications and Presentations

The effects of an evidence-based literacy intervention with and without added supports to address the unique needs of multilingual learners (MLs) were assessed through an ABAB single-case withdrawal design. The dual dependent variables were reading fluency/accuracy and performance on the workbook that included spelling, vocabulary, and reading comprehension tasks. Three students (one each in second, third, and fourth grades) who qualified for English language development services and exhibited low reading performance (second and third graders) or were identified with a reading disability (fourth grader) participated. From the initial baseline phase (A1) to the final intervention phase (B2), adding supports specific …

Don’T Sweat Interaction Trees Proof-Guided Local Variable Lifting For Interaction Trees, Yiming Lin, Ian Kariniemi, Yao Li

Computer Science Faculty Publications and Presentations

Verifying existing software is hard: Programs are developed in languages not amenable to verification, involve complicated optimizations that obscure the underlying logic, and are gigantic in size. In this paper, we propose a way to ease this pain via a simplification framework that employs interaction trees as a language-agnostic interface. We show that local variable lifting, the technique underlying AutoCorres for the Simpl language, can be generalized to interaction trees via an implementation in Rocq. A key challenge with simplifying interaction trees is that they are highly dynamic structures and we would like our approach to work with mostly uninterpreted …

Acceptability And Implementation Of A Primary Care Health Check For Autistic People: Findings From Evaluation Questionnaires And Interviews, Hannah Merrick, Helen Taylor, Barry Ingham, Tracy Finch, Sarah A. Al-Ashmori, Ruby Herrington, Clare Scarlett, Carole Buckley, Christina Nicolaidis, Dora Raymaker, Multiple Additional Authors

School of Social Work Faculty Publications and Presentations

Autistic people experience higher rates of physical and mental health conditions and face barriers to accessing healthcare. This study evaluated the acceptability and implementation of a co-designed primary care health check for autistic people (18 years+), delivered within a randomised controlled trial in Northern England investigating clinical and costeffectiveness. Following health checks, all autistic people, carers/supporters, and clinicians were invited to complete evaluation questionnaires and a subset invited for an interview. Eighty-one autistic people, 11 carers/supporters, and 18 clinicians returned questionnaires and were descriptively analysed; 44 participants were interviewed. Findings demonstrated that the pre-appointment questionnaire and health check appointment were …

A Profile Of Assisted Living Direct Care Workforce Training Requirements Across The United States, Erh-Chi Hsu, Paula Carder, Lindsey Smith, Zhiqing E. Zhou, Olga Yakusheva, Anna S. Beeber, Eric Jutkowitz, Kali Thomas

Institute on Aging Publications

Objectives

To characterize assisted living (AL) direct care worker (DCW) training requirements across the United States and how these regulations have changed over time. Specifically, we examine state-level profiles of training regulations, including duration, frequency, content, source of materials, evaluation, and changes in regulatory coverage.

Design

Cross-sectional and longitudinal descriptive study using state policy data and AL directories from 2019, 2021, and 2023.

Setting and Participants

All US states' AL training–related regulations; all ALs and AL beds governed by those regulations.

Methods

We used a mixed-methods approach with an explanatory sequential design (QUAN → qual), first conducting health services regulatory …

Superiorgat: Graph Attention Networks For Sparse Lidar Point Cloud Reconstruction In Autonomous Systems, Khalfalla Awedat, Mohamed Abidalrekab, Gurcan Comert, Mustafa Ayad, Negash Begashaw

Electrical and Computer Engineering Faculty Publications and Presentations

LiDAR-based perception in autonomous systems is fundamentally limited by sparse vertical sampling and further degraded by structured beam dropout caused by occlusions, sensor faults, or reduced-cost LiDAR hardware. These degradations disrupt vertical geometric continuity and negatively affect downstream perception tasks such as object detection, localization, and scene understanding. Existing reconstruction approaches often struggle to balance reconstruction accuracy with the computational efficiency required for real-time autonomous operation. This paper presents SuperiorGAT, a graph attention–based framework for reconstructing missing elevation information in sparse LiDAR point clouds under structured beam loss. The proposed method models LiDAR scans as beam-aware graphs and enhances standard …

Factors Influencing Non-Perennial Stream Initiation In The Mt. Hood National Forest, Allison Bast

Dissertations and Theses

Historically, non-perennial headwater streams have been overlooked due to their small size and infrequent flow regimes, often leading to them not being recognized as legitimate streams, despite scientific evidence that has shown these streams significantly affect the quality of downstream waters. To combat this issue, environmental managers need to be able to accurately identify and delineate the origins of these streams; however, despite decades of research, an accurate, universal method for predicting how and where these streams commence has yet to be developed. Early studies conducted in steep, humid environments, identified a strong inverse linear relationship between the size of …

Multi-Solution Ternary Grover’S Algorithm For Logic-Based Quantum Machine Learning With Pseudo-Kronecker Reed–Muller Form Minimization, Sophia Lee, Ali Al-Bayaty, Marek Perkowski

Electrical and Computer Engineering Faculty Publications and Presentations

Optimization problems in machine-learning (ML) applications can be computationally challenging for classical methods, particularly when they involve large, unstructured search spaces. Quantum computing offers a promising approach to combinatorial optimization by utilizing quantum superposition and amplitude amplification. This paper presents a new methodology using logic-based quantum machine learning (QML) as a complete framework for employing a multi-solution ternary Grover’s algorithm to minimize incomplete binary functions represented by Pseudo-Kronecker Reed–Muller (PKRO) expansions, consistent with Occam’s razor principle. Unlike previous quantum approaches based on Kronecker Reed–Muller (KRO) or fixed-polarity Reed–Muller (FPRM) representations, our work introduces the first Grover-based optimization framework for PKRO …

A Systematic Approach For Controlling Tem Sample Thicknesses, Monte Kozell

Physics Faculty Publications and Presentations

Historically, TEM prep has been an artisan craft without a systematic workflow that ensures quantified control over TEM sample thickness. Over- and under-thinning is a significant problem in the TEM prep process. A direct measurement process was demonstrated to control the final thickness of the TEM lamella. Final lamella thickness was controlled by directly measuring lamella thickness in real time using a 10–15 kV SEM while performing secondary electron imaging at the mill position, allowing for (human-mediated) closed-loop processing. We demonstrated the utility of this technique by systematically thinning five TEM samples to discretely target thicknesses ranging from 100 nm …

Epidemic Dynamics Under Pulse Population Exchange, Hannah Kravitz, Christina Durón, Moysey Brio

Mathematics and Statistics Faculty Publications and Presentations

Many epidemiological models assume either closed populations or continuous demographic turnover. We consider an intermediate setting in which exchange occurs through discrete pulses. In this paper, we introduce a population-conserving compartmental epidemiological model with pulse population exchange at a set of prescribed times. At each pulse, a fraction of the population in each compartment is replaced by a combination of susceptible and immunized individuals. In contrast to typical pulse birth or pulse vaccination models where only a single compartment undergoes a pulse population change, the pulses in this model have competing effects: removing infectious individuals reduces the force of infection, …

Comparative Analysis Of Bacterial Recbcd And Sbcc-Sbcd Systems And The Yeast Mre11-Rad50 Complex During Dna Replication, Tannos Seyedjavadi

Dissertations and Theses

Accurate completion of DNA replication when forks converge is essential for genome stability. In Escherichia coli, several proteins have been identified including RecG, ExoI, RecBCD, and SbcCD, that contribute to completing replication, and loss of these factors causes genetic instability. Eukaryotes encode proteins with homology to several E. coli completion enzymes. Mre11–Rad50 complex is structurally and functionally conserved with bacterial SbcCD, and Rrm3 shares homologous motifs with bacterial RecBCD. These proteins are often described as being involved in homologous double strand break repair. Whether they are also conserved and play a similar role as their E. coli counterparts in …

Degree Assortativity And Estimation Of Degree Distribution In A Contact Network Of People Who Inject Drugs, Peter Geissert

Dissertations and Theses

This dissertation analyzes data from a respondent driven sampling (RDS) study of people who inject drugs in Portland, OR.  The objective was to assess assumptions for the use of weighted estimators to estimate a population physical contact (syringe sharing) network degree distribution.

Visualization of degree distribution for social and physical networks, Kolmogorov-Smirnov tests of difference, and kernel tests of equivalence were used for comparison of distributions. Spearman's rho and GAM non-parametric regression models were used to test for association and assess non-monotonic relationship. The validity of Markov chain assumptions for RDS was assessed using a transition matrix, Markov chain graphs, …

God's Not Neutral: Narrative Tropes, Spiritual Warfare, And The Construction Of Evangelical Political Identity In American Christian Fiction, Evelyn L. Mccullough

Dissertations and Theses

Evangelical Christian fiction has reached tens of millions of readers and viewers during the most sustained period of evangelical political mobilization in American history, yet its narrative construction remains largely unexamined. This study asks how recurrent tropes in this genre build the attitudinal and emotional preconditions for political engagement. Combining systematic qualitative content analysis of eight texts spanning four decades (1986–2024) with Critical Discourse Analysis grounded in van Dijk's sociocognitive framework, it traces how storytelling devices connect theological belief to political behavior. The analysis reveals a single organizing logic: the corpus holds one regressive heroic disposition constant while making it …

Extending W-Event Differential Privacy To The Publish-Subscribe Framework, Jacob Jerome Olinger

Dissertations and Theses

Internet of Things (IoT) devices have become ubiquitous, permeating both enterprises and homes, and they increasingly rely on publish-subscribe (pub-sub) frameworks that give subscribers real-time, high-fidelity access to device data. For privacy and confidentiality, however, today's pub-sub systems largely stop at channel-level authentication, encryption, and access-control lists. These protect data in transit and restrict who may receive it, but place no quantitative limit on what a subscriber with legitimate access to messages can infer about its publishers.

We close this gap by extending w-event differential privacy to the pub-sub setting. We generalize it from count queries to any aggregate …

Omoiyari In The Performance Of American Learners Of Japanese: An Analysis Of Second Culture Compilation And Pragmatic Transfer, Shizuka Fukuo

Dissertations and Theses

This thesis examines omoiyari (consideration for others) as a Japanese cultural theme by examining how it is enacted by native Japanese speakers and American learners of Japanese during an invitation scenario. L2 learners' incorporation of the target culture's linguistic and behavioral norms is essential to fully participate in ways that read as natural in that culture. However, relatively little research has examined the extent to which L2 learners are able to enact culturally embedded norms in L2 interaction. Furthermore, little attention has been paid to explaining the cultural theme of omoiyari as it is enacted in an invitation role-play provides …

Without A Map: A Lived Experience Study Of The Paths People Create Through Homelessness, Kathleen P. Conte, Susan Avila, Desiree' J. Duboise, Carlton Bone, Marisa A. Zapata, Transformational Research For Equity And Experience In Shelter (Trees) Committee

Homelessness Research & Action Collaborative Publications and Presentations

The Pathways to Housing Study examines how people experience and navigate homelessness and the systems intended to help them move toward stable housing. Conducted in Multnomah County, Oregon, the study used a participatory mixed-methods design co-led with the TREES lived experience committee. The first phase was reported in April 2026 included surveys with 541 people with current or recent experience of homelessness. The second phase, reported here, used in-depth interviews and journey mapping with 29 participants to explore how pathways through homelessness unfold over time and across service systems.

Findings demonstrate that homelessness pathways are rarely linear. Participants described entering …

Catching A Glimpse Of Complex Relaxation: A Theoretical Phase Transition Is Finally Experimentally Observed In A Material, Yogesh Joglekar

Physics Faculty Publications and Presentations

A bulk crystal, as small as 0.5 mm in size, contains more than a quintillion atoms that behave collectively like a large-scale object. When such a crystal is disturbed by an outside influence, it quickly transitions into a new steady state after a brief transient phase known as relaxation. When this phase is the shortest in duration, the system can exhibit extreme sensitivity to even a tiny perturbation. Examining changes in relaxation in a bulk material could help engineer new sensors and rapid response devices. However, the transient response only lasts for a few picoseconds, making observation difficult. On page …

Representing Post-Fire Reality: An Empirically Informed Temperature Index Approach To Post-Fire Hydrologic Modeling In Oregon's Western Cascades, Logan Hastings

Dissertations and Theses

The invaluable water resources stored in snowpack face mounting threats from rising temperatures, drought, shifts in precipitation regimes, and increased fire frequency, which pose challenges to operational hydrologic modeling in Oregon's sensitive maritime snowpacks. The gridded temperature index (GTI) approach in operational models like the Hydrological Engineering Center's Hydrologic Modeling System (HEC-HMS) from the U.S. Army Corps of Engineers remains in common use for its minimal data requirements, but how GTI parameterizations should adapt to post-fire conditions is largely unknown.

This research assessed the impact of the 2020 Lionshead Fire on HEC-HMS performance in the North Santiam River basin across …

Post-Fire Erosion And Debris Flows In The Western Pacific Northwest, United States: Recent Science And Opportunities, Sara A. Wall, Kevan Moffett, Annette Patton, Ben Leshchinsky, Andrew C. Wilcox, Maryn Sanders, Heejun Chang, Josh Roering

Geography Faculty Publications and Presentations

Most research into post-fire geomorphology has been conducted in regions with frequent fire, such as in dry Mediterranean and temperate climates and less has been conducted in wet forests where wildfire is now expanding with climate change. Because climate, soils, topography, vegetation, management legacies and fire history influence post-fire geomorphic processes, research into post-fire erosion and debris flow hazards across a broader set of climatologies is needed. The western Pacific Northwest (wPNW) of the United States is susceptible to multiple types of post-fire debris flows (i.e. shallow landslide-initiated and runoff-generated) that can be initiated by longer-duration lower-intensity rainfall compared to …