Digital Commons Network^™

Experiences Of Minority Workers: A Three-Study Dissertation Evaluating Recruitment And Workplace Experiences For Minority Workers, Jennifer Saucedo

Dissertations and Theses

Through a series of three manuscripts, the dissertation explores the experiences of minority groups across different points of the employee life cycle. As minority employees often face a negative set of unique stressors inside and outside of work, this series of papers attempt to further our understanding of minority experiences during the organizational stages of recruitment and retention. The first manuscript tests the effects of recruitment material on pre-hire applicant outcomes for minorities by integrating literature on realistic job previews (RJPs) and diversity recruitment. The experimental study finds that leader diversity testimonials that provide a mix of positive and negative …

Oregon State Rank Assessment For Kruckeberg Mountainbalm (Monardella Kruckebergii), Nora Dunkirk, Gabriel E. Campbell

Institute for Natural Resources Publications

Oregon state conservation status assessment for Kruckeberg mountainbalm (Monardella kruckebergii) using NatureServe methodology, 2025.

Oregon State Rank Assessment For Cascade Rockcress (Boechera Cascadensis), Gabriel E. Campbell, Nora Dunkirk

Institute for Natural Resources Publications

Oregon state conservation status assessment for Cascade rockcress (Boechera cascadensis) using NatureServe methodology, 2025.

Faculty Senate Monthly Packet February 2025, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The February 3, 2025 monthly packet includes the agenda, appendices, and the Faculty Senate minutes and attachments from the meeting held February 3, 2025.

Seguir Adelante: A Qualitative Exploration Of Latino Farmworkers' Work And Nonwork Resources., Faviola Robles Saenz, Julissa Castellanos Regalado, Larry Martinez, Greg Townley

Psychology Faculty Publications and Presentations

Latino immigrant workers have been an exploited community within many dangerous workforces, but especially within the agricultural industry. They are a crucial population for the labor and economy of the U.S., yet Latino farmworkers report feeling expendable, discriminated against, and exposed to hazardous working conditions. Due to these experiences, it is essential to explore the resources that farmworkers find valuable in improving their working conditions. This study draws upon qualitative interviews conducted with 41 Latino farmworkers in Oregon. Themes pertaining to work and nonwork resources were uncovered through thematic analysis, illustrating that farmworkers receive support from their proximal communities and …

Youth Experiences Of Participation, Inclusion, And Influence Within A Youth-Serving Organization Implementing Participatory Processes, Rhen M. Miles

Dissertations and Theses

The youth development field has undergone shifts and reconstructions in how youth are conceived, impacting the approaches of youth-serving programs attempting to facilitate learning, growth, and engagement. Evolving views inform how policymakers, funders, and youth-serving agencies perceive and relate with youth. In turn, these dynamics influence how youth learn to think about themselves, others, and the world. Dominant discourse regarding youth development has been shifting from a deficit-based to an asset-based lens, with the proliferation of Positive Youth Development (PYD) frameworks, which seek to cultivate internal strengths and positive developmental outcomes rather than just prevent negative behaviors and outcomes. Despite …

"I'Ll Just Say It's Been A Racist Process": The Power Dynamics Within And Outside Diversity Requirement Classrooms At A Minority-Serving Institution, Kazusa Seko

Dissertations and Theses

U.S. higher educational institutions have increasingly implemented diversity requirements; however, institutional power dynamics during the implementation process and in a classroom after the implementation should be more highlighted. This study aims to understand the implementation of a diversity requirement during the implementation process and faculty and student experiences within required diversity courses at Portland State University (PSU) by analyzing one-on-one semi-structured interviews. PSU is a minority-serving educational institution that implemented a diversity requirement, the Race and Ethnic Studies Requirement (RESR), in Fall 2022. These data are analyzed through Critical Race Theory (CRT) lenses--introducing Okun's (2021) white supremacy culture in an …

Risk-Based Methodology For Structural Evaluation Of Bridge-Sized Culverts, David Yang, Kevin White, Timothy Wood

Civil and Environmental Engineering Faculty Publications and Presentations

This report presents the results of the project sponsored by the Federal Highway Administration (FHWA), “Risk Based Methodology for Structural Evaluation of Bridge-Sized Culverts”. The goal of this project was to develop general methodology to (a) quantify uncertainty, especially live load uncertainty, unique to bridge-sized RC box culverts and (b) analyze and calibrate reliability of culverts rated under different rating loads. Over 344 combinations of culvert designs and backfill depths were analyzed based on the AASHTO Manual for Bridge Evaluation as well as the three-dimensional finite element models (FEMs) of the soil-culvert systems. For each combination, a wide range of …

Phase Of The Seabed Frequency-Domain Reflection Coefficient: Measurements And Modeling, Charles W. Holland

Electrical and Computer Engineering Faculty Publications and Presentations

The phase of the seabed frequency-domain reflection coefficient potentially contains valuable information on the geoacoustic properties in a layered/refracting seabed. However, heretofore, the phase has not been exploited. Measurements of phase are presented in an area of thick mud at the New England Mud Patch. In addition, a model is presented along with the modeling results. While this is only a first step towards understanding the potential value of exploiting the phase, it seems clear that in some instances, the phase not only contains valuable geoacoustic information, but carries a higher information content than the magnitude.

How Was Your Crossing Experience? Development Of A Pedestrian Satisfaction With Unsignalized Crossings Scale, Seth Lajeunesse, Wesley Kumfer, Sirisha Kothuri, Krista Nordback, Nathan Mcneil

Civil and Environmental Engineering Faculty Publications and Presentations

Unsignalized pedestrian crossing accommodations can improve pedestrian safety, yet their quality of service for pedestrians remains understudied. The present study explored whether and how pedestrians’ satisfaction with crossing unsignalized crossings varied according to the type of crossing accommodation used, that is, the rectangular rapid-flashing beacon (RRFB) with median island, median island alone, marked crosswalk, and unmarked crosswalk. The research team collected intercept survey and video observation data from 358 pedestrians across a total of 40 sites in two different cities. Structural equation models illustrated how pedestrians’ crossing-oriented satisfaction was shaped by their positive perceptions of safety and low levels of …

Pumped Storage Hydropower In The United States: Emerging Importance, Environmental And Social Impacts, And Critical Considerations, Surabhi Karambelkar, Alida Cantor, Thien-Kim Bui, Bethani Turley, Maryalice Fischer, Shannon Ames

Geography Faculty Publications and Presentations

Pumped storage hydropower is a widely used, long-duration energy storage system that sits squarely at the water-energy nexus. Bold decarbonization goals have propelled a rapid resurgence of interest in pumped storage hydropower in the US, given its ability to provide bulk energy storage, manage grid reliability, and support increasing integration of variable renewable energy sources. Drawing on published research from both technical and social science perspectives, this paper provides an overview of pumped storage hydropower technology, the project development pipeline, potential social and environmental impacts, including a comparison of open-loop and closed-loop design configurations, and critical considerations for project development. …

Introduction To The Special Issue On Verification And Validation Of Source And Propagation Models For Underwater Sounda), Kathleen J. Vigness-Raposa, Klaus Lucke, Michael A. Ainslie, Michele B. Halvorsen, Christ A. F. De Jong, Stanley J. Labak, Martin Siderius

Electrical and Computer Engineering Faculty Publications and Presentations

This joint Special Issue of JASA and JASA Express Letters focuses on underwater sound source and propagation modelling, both of ambient sound as well as sources of relevance to possible effects of sound on aquatic life, and corresponding acoustical metrics. Combining information on the sound field with information on a dose-effect relationship enables estimation of the potential effects. The Special Issue presents a collection of eighteen articles on the following topics: (1) verification of source and propagation models, (2) validation of source and propagation models, and (3) bioacoustical metrics for assessment of the risk of environmental effects. This special issue …

Understanding Anionic Hyperporphyrins: Tddft Calculations On Peripherally Deprotonated Meso-Tetrakis(4-Hydroxyphenyl)Porphyrin., Jeanet Conradie, Carl C. Wamser, Abhik Ghosh

Chemistry Faculty Publications and Presentations

Presented herein is a DFT/TDDFT study of -tetrakis(4-hydroxyphenyl)porphyrin (H[THPP]) and its Meso-deprotonated tetraanionic form; the latter was modeled as both a free tetraanion and with various counterions. Based on our calculations, the experimentally observed hyperporphyrin spectra are attributed to an admixture of phenol/phenoxide character into the a-type HOMO of tetraphenylporphyrin. The admixture results in an elevation of the orbital energy of the HOMO in relation to other frontier orbitals, which accounts for the observed spectral redshifts. The calculations underscore differences in the performance of different exchange-correlation functionals. Thus, while the popular hybrid functional B3LYP greatly exaggerates the redshift of …

Oregon State Rank Assessment For Transparent Milk-Vetch (Astragalus Daphanus Var. Diaphanus), Nora Dunkirk, Gabriel Campbell

Institute for Natural Resources Publications

Oregon state conservation status assessment for Transparent Milk-vetch (Astragalus daphanus var. diaphanus) using NatureServe methodology, 2025.

Explaining The 2022 Record Low Great Salt Lake Volume, Siiri Bigalke, Paul C. Loikith, Nicholas Siler

Geography Faculty Publications and Presentations

The Great Salt Lake reached the lowest water volume in its entire 170+ year record in 2022. To explain this record low we develop and apply a lake mass‐balance model and perform four simulations: one where all input and output variables are fixed to their mid‐20th century average resulting in an equilibrium lake volume, and three others where one of the input variables (precipitation or streamflow) or the output variable (evaporation) follows observations while the other two are fixed to their mid‐20th century average. Results show anomalously low streamflow accounting for the largest proportion of the lake volume departure from …

3F4 Hypergeometric Functions As A Sum Of A Product Of 1F2 Functions, Jack C. Straton

Physics Faculty Publications and Presentations

This paper shows that certain ₃F₄ hypergeometric functions can be expanded in sums of pair products of ₁F₂ functions. In special cases, the ₃F₄ hypergeometric functions reduce to ₂F₃ functions. Further special cases allow one to reduce the ₂F₃ functions to ₁F₂ functions, and the sums to products of ₀F₁ (Bessel) and ₁F₂ functions. The class of hypergeometric functions with summation theorems are thereby expanded beyond those expressible as pair-products of ₂F₁ functions, ₃F₂ functions, and generalized Whittaker functions, into …

Charging Ahead: Prioritizing Renewable Energy For Electric Minibuses In The Philippines, Thomas Stringer, Sandy Mae Gaspay, Varsolo Sunio, Manuel Burelo

Center for Urban Studies Publications and Reports

This study evaluates the environmental and economic impacts of transitioning to electric minibuses (e-jeepneys) in the informal transportation sector of the Philippines. Using a comprehensive model that simulates different e-jeepney uptake scenarios and electricity grid configurations, we analyze carbon emissions and energy costs. Data from the 2023 energy grid and vehicle emission standards are utilized to assess various grid scenarios, including net-zero and natural gas options. Our findings reveal that a 10% increase in e-jeepney uptake results in significant reductions in both carbon emissions (36 gCO2/km) and energy costs (0.70 PHP/km) when paired with a decarbonized grid. The study underscores …

Performance Methodologies In Suicide Prevention Research: Queerness, Colonization, And Co-Performative Witnessing In Indigenous Community, Antonia R. G. Alvarez

School of Social Work Faculty Publications and Presentations

Performance methodologies take many forms—performative writing, poetic transcription, and co-performative witnessing, to name only a few—and can be both process and product, differentiating and unifying a group between and across differences. As a social work researcher committed to decolonial, liberatory methodologies that make and bring meaning to the communities I work with, performance methodologies fill a gap that other qualitative research methods can only begin to approach. This project is an exploration in performance methodologies and Critical Suicidology through the lens of social work research, with a case study derived from a performance documenting suicide prevention research with Native Hawaiians. …

Forest Fires Increase Mid-Winter Snowmelt In The Western Oregon Cascades, Sage Ebel

Dissertations and Theses

As the spatiotemporal overlap between burned forests, seasonal snow, extreme precipitation, and mid-winter warming continues to increase with climate change, it is critical we quantify the impacts of forest fires and rain-on-snow (ROS) on mid-winter snowmelt and snow-water resources. In the Pacific Northwest, the release of large volumes of meltwater to downstream receiving water from already vulnerable snowpacks can have catastrophic consequences. I show that forest fires doubled mid-winter snowmelt proportions as compared to unburned reference sites, using a novel network of snow monitoring and micrometeorological stations installed across an elevational and forest type gradient in a burned watershed in …

Integrative Approaches To Climate Resilience Planning: Application Of A Plan Evaluation Framework, Maulsri Jha

Dissertations and Theses

In the last two decades, urban governments have streamlined and prioritized the creation and implementation of climate resilience plans to cater to the communities' vulnerabilities. Existing research illustrates that there is a gap in understanding how, or if, empirical (evidence-based) data are incorporated into the design and implementation of such plans and the extent to which their inclusion impacts outcomes in terms of vulnerability reduction. There is also a gap in the systematic study of their outcomes in terms of community resilience, and whether equity and environmental justice are promoted as priorities.

The purpose of the research is to understand …

Tree-Equity And Environmental Justice Discourses Among Urban Forestry Professionals In Portland: Current Impacts And Future Implications, Axcelle Deone Bell

Dissertations and Theses

Urban tree equity is critical for addressing environmental justice and mitigating the effects of climate change in cities. This study investigates how professionals in Portland's urban forestry sector conceptualize and implement tree equity, focusing on equity and justice discourses. Through 27 semi-structured interviews with 29 professionals from government agencies and NGOs, I examine how these discourses shape decisions regarding tree planting, distribution, and maintenance, particularly in underserved communities. The analysis draws on political ecology, systems dynamics, and structuration theory to explore the systemic barriers perpetuating inequities in tree canopy distribution. The findings reveal tensions between different approaches to equity, such …

Prediction-Powered Inference For Clinical Trials, Pierre-Emmanuel Poulet, Maylis Tran, Sophie Tezenas Du Montcel, Bruno Dubois, Stanley Durrleman, Bruno M. Jedynak

Mathematics and Statistics Faculty Publications and Presentations

Prediction-powered inference (PPI) [1] and its subsequent development called PPI++ [2] provide a novel approach to standard statistical estimation leveraging machine learning systems to enhance unlabeled data with predictions. We use this paradigm in clinical trials. The predictions are provided by disease progression models, providing prognostic scores for all the participants as a function of baseline covariates. The proposed method would empower clinical trials by providing untreated digital twins of the treated patients while remaining statistically valid. The potential implications of this new estimator of the treatment effect in a two-arm randomized clinical trial (RCT) are manifold. First, it leads …

Direct Graphene Growth On Low-Alloy And Mild Steel Surfaces Controlled By Carbon Solubility And Surface Microstructural Transformations During Chemical Vapor Deposition, Kaleb Hood, Nam Nguyen, Sebastian Lara, Adan Velasquez, Samuel Olson, Yi Xia, Jun Jiao

Mechanical and Materials Engineering Faculty Publications and Presentations

This study demonstrates for the first time, graphene grown directly on the iron-rich surfaces of bulk 8620 low-alloy and 1018 mild steel by chemical vapor deposition, a key step toward developing thin graphene coatings with strong graphene-steel bonding. Low growth temperatures of 660 °C–680 °C, were used to manipulate the steel's carbon solubility, confining carbon diffusion and microstructural transformations to the surface regions, with the bulk relatively unchanged. For 1018, a growth temperature of 680 °C resulted in a multilayer graphene coating with 80 % coverage. The alloying elements in 8620 improved graphene formation by influencing the surface microstructure transformations …

Identifying The Effect Of Architecture Morphology On Wind Fields And Pm2.5 Dispersion At The Urban Block Scale Via A Combined Scheme, Bin Guo, Lu Li, Xiaowei Zhu, Zheng Wang, Miaoyi Chen, Lin Pei, Tengyue Guo

Mechanical and Materials Engineering Faculty Publications and Presentations

This study explores the potential of architecture morphology to mitigate PM2.5 pollution through enhanced urban ventilation. Despite the recognized influence of building designs on wind and air pollution distribution at the urban block scale, specific mechanisms remain poorly understood. To address this gap, we have developed an integrative approach combining in-situ observations, Geographic Information System (GIS), Remote Sensing (RS), Computational Fluid Dynamics (CFD), and statistical modeling. Here, CFD simulates the flow field and PM2.5 dispersion, using in-situ observations for turbulence model selection. GIS quantify architecture morphology parameters to establish accurate CFD boundary conditions, ensuring simulations reflect real-world conditions and precise …

Cardiometabolic Multimorbidity And Dementia Onset Among Middle-Aged And Older Adults: Differences By Race/Ethnicity., Siting Chen, Ana R. Quiñones, Corey L. Nagel, Nicholas J. Bishop, Heather G. Allore, Jason T. Newsom, Jeffrey Kaye, Anda Botoseneanu

Psychology Faculty Publications and Presentations

Racial/ethnic minoritized groups in the U.S. have higher prevalence of cardiometabolic multimorbidity and experience higher risk of dementia. This study evaluates the relationship between cardiometabolic multimorbidity and dementia onset according to racial/ethnic group in a nationally representative cohort of U.S. middle-aged and older adults.

Identification And Analysis On Surface Deformation In The Urban Area Of Nanchang Based On Ps-Insar Method, Mengping Zhang, Jiayi Pan, Peifeng Ma, Hui Lin

Civil and Environmental Engineering Faculty Publications and Presentations

Interferometric Synthetic Aperture Radar (InSAR) technology has emerged as a vital tool for monitoring surface deformation due to its high accuracy and spatial resolution. With the rapid economic development of Nanchang, extensive infrastructure development and construction activities have significantly altered the urban landscape. Underground excavation and groundwater extraction in the region are potential contributors to surface deformation. This study utilized Sentinel-1 satellite data, acquired between September 2018 and May 2023, and applied the Permanent Scatterer Interferometric Synthetic Aperture Radar (PS-InSAR) technique to monitor surface deformation in Nanchang’s urban area. The findings revealed that surface deformation rates in the study area …

Oregon State Rank Assessment For Western Marsh-Rosemary (Limonium Californicum), Nora Dunkirk, Gabriel E. Campbell

Institute for Natural Resources Publications

Oregon state conservation status assessment for western marsh-rosemary (Limonium californicum) using NatureServe methodology, 2025.

Faculty Senate Monthly Packet January 2025, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The January 6, 2025 monthly packet includes the agenda, appendices, and the Faculty Senate minutes and attachments from the meeting held January 6, 2025.

Drta: Dynamic Reward Scaling For Reinforcement Learning In Time Series Anomaly Detection, Bahareh Golchin, Banafsheh Rekabdar, Kunpeng Liu

Computer Science Faculty Publications and Presentations

Anomaly detection in time series data is important for applications in finance, healthcare, sensor networks, and industrial monitoring. Traditional methods usually struggle with limited labeled data, high false-positive rates, and difficulty generalizing to novel anomaly types. To overcome these challenges, we propose a reinforcement learning-based framework that integrates dynamic reward shaping, Variational Autoencoder (VAE), and active learning, called DRTA. Our method uses an adaptive reward mechanism that balances exploration and exploitation by dynamically scaling the effect of VAE-based reconstruction error and classification rewards. This approach enables the agent to detect anomalies effectively in low-label systems while maintaining high precision and …

Scitopic: Enhancing Topic Discovery In Scientific Literature Through Advanced Llm, Pengjiang Li, Zaitian Wang, Xinhao Zhang, Ran Zhang, Lu Jiang, Pengfei Wang, Yuanchun Zhou

Computer Science Faculty Publications and Presentations

Topic discovery in scientific literature provides valuable insights for researchers to identify emerging trends and explore new avenues for investigation, facilitating easier scientific information retrieval. Many machine learning methods, particularly deep embedding techniques, have been applied to discover research topics. However, most existing topic discovery methods rely on word embedding to capture the semantics and lack a comprehensive understanding of scientific publications, struggling with complex, high-dimensional text relationships. Inspired by the exceptional comprehension of textual information by large language models (LLMs), we propose an advanced topic discovery method enhanced by LLMs to improve scientific topic identification, namely SciTopic. Specifically, we …