Digital Commons Network^™

Vacuum Modification Of The Surface Properties Of T15k6 Hard Alloy By Plasma–Chemical Synthesis Of Tin-Cu Coatings, Aleksandr Semenov, Dmitriy Tsyrenov, Nikolay Ulakhanov, Irina Semenova, Undrakh Mishigdorzhiyn, Wen Ma, Simon C. Tung, George E. Totten

Mechanical and Materials Engineering Faculty Publications and Presentations

The design and main parameters of a plasma–chemical reactor containing two compartments are presented. One compartment houses a vacuum-arc evaporator, while the other houses a planar magnetron. The compartments are separated by a diaphragm with a dosing slot for injecting copper vapor into the TiN synthesis compartment. The conditions for the synthesis of superhard TiN-Cu composite coatings are experimentally determined. Based on established process parameters for TiN synthesis in a nitrogen-containing plasma by Ti evaporation using a vacuum-arc discharge, it is proposed to apply TiN-Cu coatings by injecting Cu vapor into the TiN synthesis area and sputtering Cu using a …

Detecting Eigenvectors Of An Operator That Are Near A Specified Subspace, David Darrow, Jeffrey S. Ovall

Mathematics and Statistics Faculty Publications and Presentations

In modeling quantum systems or wave phenomena, one is often interested in identifying eigenstates that approximately carry a specified property; scattering states approximately align with incoming and outgoing traveling waves, for instance, and electron states in molecules often approximately align with superpositions of simple atomic orbitals. These examples—and many others—can be formulated as the following eigenproblem: given a selfadjoint operator L on a Hilbert space H and a closed subspace W ⊂ H, can we identify all eigenvectors of L that lie approximately in W? We develop an approach to answer this question efficiently, with a userdefined tolerance and range …

Psychometric Analysis Of The German Version Of The Barriers To Healthcare Checklist-Short Form, Judith Peth, Nicole David, Sophia Duckert, Petia Gewohn, Daniel Schottle, Pascal Rahlff, Alexander Konnopka, Hannah Konig, Kai Vogeley, Christina Nicolaidis, Dora M. Raymaker, Holger Schulz

School of Social Work Faculty Publications and Presentations

Background: Autistic people face multiple barriers to health care. To recognize specific barriers in a standardized way, autistic people, health care providers, and researchers need a suitable measure. The Academic Autistic Spectrum Partnership in Research and Education successfully developed the Barriers to Healthcare Checklist— Short Form (BHC-SF). It remains unclear whether (1) a German version of the BHC-SF performs well in terms of psychometric properties and (2) the BHC-SF consists of multiple constructs (i.e., assessing structural validity). Methods: We created a translated and culturally adapted version of the 17-item BHC-SF and used it with 345 autistic people in Germany. Psychometric …

Holding The Line: The Existential Threat To Dei Language And Values, Terrance Fitzsimmons, Larry Martinez, Jennifer Bishop, Darryl Rice, Florence Villesèche

Psychology Faculty Publications and Presentations

Purpose – This article critically analyses and critiques the operationalisation of the Trump administration’s anti- DEI policies on Diversity, Equity and Inclusion (DEI) initiatives in the United States of America and beyond. It specifically examines the attempt to silence DEI scholarship and practice, assessing the broader implications for social justice and global progress towards equity. The article also positions these attacks as an existential threat to DEI scholarship, scholars and practitioners, with the potential to reverse progress made since the adoption of the Universal Declaration of Human Rights in 1948. The article serves as a call to action, urging the …

Improving The Circuit Realization Of Grover’S Quantum Search Algorithm By Replacing Hadamard With √ × Gates, Ali Al-Bayaty, Ali Al-Shuwaili, Abbas Alzubaidi, Marek Perkowski

Electrical and Computer Engineering Faculty Publications and Presentations

Jozsa, Bernstein-Vazirani, and Grover, utilize Hadamard gates to create uniform superposition states for the input qubits of an oracle. However, Hadamard gates are non-native (non-supported) gates in all real quantum computers. For this reason, Hadamard gates are considered cost-expensive gates when realizing (transpiling) such algorithms into a real quantum computer. This paper introduces a new methodology for cost-effective transpilation of Grover’s algorithm into real quantum computers, by replacing all Hadamard gates with √ X gates. In quantum computing, the Hadamard and √ X gates create uniform superposition states of a qubit on the Xaxis and Y-axis of the Bloch sphere, …

Accelerated Coupled Mode Model For Fiber Laser Amplifiers As An Averaged Dynamical System, Rebecca Bryant, Jacob Grosek, Jay Gopalakrishnan

Mathematics and Statistics Faculty Publications and Presentations

We apply a known theorem for simplifying dynamical systems with bounded error to a specific optical fiber waveguide problem, thereby supplementing the physical intuition and heuristics used in the optics community with proper mathematical justification. Using techniques from the averaging theory of dynamical systems, a reliable accelerated model based on the coupled mode theory (CMT) approach for a common fiber laser amplifier application is derived. Computational testing reveals that this accelerated model achieves a ∼4000x increase in computational speed compared to the CMT model while preserving high accuracy in key figures of merit such as output power and amplification efficiency. …

Modeling The Combined Effects Of Forest Fire And Climate Change On Snow-Water Storage In The Oregon Cascades, Joseph D. Vigil

Dissertations and Theses

Forest fire and climate change are reshaping the snow hydrology of the Pacific Northwest of the United States, yet the combined effects of these disturbances on snow accumulation, storage, and melt timing remain poorly quantified in these Mediterranean mountain watersheds. This study integrates field-based snow and radiation observations with physically based modelling to evaluate how postfire forest structure, postfire snow albedo decay, and future climate change influence snow-water storage in the Breitenbush watershed of the western Oregon Cascades. This work was conducted as part of a broader U.S. Army Corps of Engineers effort to improve postfire hydrologic prediction and flood …

"I Wasn't Broken": Addressing Stigma Associated With Dementia While Walking The Talk For Dementia, Kate Irving, Fernando Aguzzoli Peres, Walter D. Dawson, Jonathan Adrián Zegarra-Valdivia, Lingani Mbakile-Mahlanza, Sherril B. Gelmon

Institute on Aging Publications

INTRODUCTION:Walking the Talk for Dementia (WTD) convenes people from every continent and multiple perspectives, including people with lived experience, in a 40- km walk followed by a 2-day symposium. The aim is collective reflective dialogue about dementia stigma without the burden of professional hierarchies.

METHODS: Qualitative reflections during and immediately following the walk were analyzed using content analysis to identify common themes.

RESULTS: Three themes demonstrate an evolution of perspectives about dementia and stigma: “meeting the person not the label”, “a community in solidarity”, and “I wasn’t treated like I was broken, and I wasn’t broken.”

DISCUSSION: WTD created an …

The Pathways Study: Findings From Surveys Of People With Recent Experience Of Homelessness In Multnomah County, Kathleen P. Conte, Amy Laird, Desiree' J. Duboise, Susan Avila, Carlton Bone, Transformational Research For Equity And Experience In Shelter (Trees) Committee, Marisa Zapata

Homelessness Research & Action Collaborative Publications and Presentations

As historic levels of funding to resolve and prevent homelessness draws down in Multnomah County, entities providing homeless services want to know the most effective ways of supporting people experiencing homelessness. The “Pathways” study aims to help answer that question. Through surveys and interviews, we sought to understand how people navigate their lives while homeless, and in particular how they interacted with homeless services. Overall, the findings reinforce what previous studies have found: people want housing, need housing to be affordable and within their means, and value helpful effective services. This report presents findings from surveys with 541 people with …

Goals And Budgets: An Exploratory Study Of Sequencing In Budget Simulation Engagement, Frankline Muthomi

Public Administration Faculty Publications and Presentations

Purpose:

The purpose of this study is to examine how the sequencing of budget simulations influences the alignment between priority goals and budgetary decisions. Drawing on behavioral perspectives, the study posits that two simulation sequences—goal setting to budgeting (default) and budgeting to goal setting (alternative)—shape individuals' budgetary responses, particularly the proximity between a program's total cost and the corresponding budgetary allocations. Design/methodology/approach This study employs a quasi-experimental research design using Balancing Act modules that enable participants to articulate their priority goals and corresponding resource allocations. Adult Americans (aged 18 and above) were recruited through an online crowdsourcing platform and randomly …

Multiple-Valued Quantum Automata For Robotics, Yuchen Huang

Dissertations and Theses

This dissertation introduces a new type of quantum automata, their encoding and circuit realization. I concentrate on possible applications in robotics. Several methods and application of quantum automata and quantum circuit-based controllers for elementary robotic systems, with a focus on humanoid robot motion, emotion, and behavior generation are illustrated in detail. The research introduces several novel methodologies that bridge quantum computing principles with robotic control, aiming to overcome the limitations of classical deterministic and probabilistic approaches.

The dissertation first presents a quantum-circuit-based framework for generating non-repetitive and expressive (e)motions in a humanoid robot actor, using superposition and entanglement to produce …

Reinvesting In A Lived Experience Workforce: An Exploration Of Why Peer Support Specialists Leave The Field, Morgan Rae Pelot

Dissertations and Theses

Peer support specialists (PSSs) are individuals who use their lived experience of mental health challenges along with formal training to provide peer support to other individuals experiencing similar challenges. PSSs have only become integrated into the mental health care system within the last several decades. Recently, a study reported a trend of PSSs leaving the field of peer support, but there is a gap in the literature exploring factors that may influence this decision. This study examined if self-efficacy, motivations to join the workforce, and negative work experiences were related to workforce retention. A secondary cross-sectional analysis was conducted on …

Impact Of Parent Education Programmes On Confidence And Self-Efficacy In Parents Of Preterm Infants: A Systematic Review, Puja Padbidri, Veena Joshi, Hollie Hix-Small, Pooja Bhavarth Dekhane

Educator Licensure Faculty Publications and Presentations

Objective:

Families of preterm infants can experience high stress during neonatal intensive care unit (NICU) hospitalisation, which interferes with the development of parenting confidence and self-efficacy through active engagement with their infants. Parent NICU support programmes provide guidance and education to build this connection. This systematic review examined the effects of parent education programmes on confidence and self-efficacy among parents of preterm infants.Design Systematic review in PubMed/Medline, PsycINFO, CINAHL, Google Scholar and Web of Science.Setting NICU.Participants Parents of preterm infants.Intervention Education programmes offered to parents in the NICU.Main outcome measures Quantitative surveys measuring parent confidence or self-efficacy.Results 14 studies met …

Relational Histories: Exploring The Transmission Of Ceramic Technology In The Norton Sound Region Through Petrographic Analysis, Laurel Michelle Diciuccio

Dissertations and Theses

Ceramic technology in the Bering Strait region of the North American Arctic dates to approximately 2,500 BP and is broadly divided into two traditions: the Early Arctic (Norton, pre-1,500 BP) and the Late Arctic (Thule, post-1,500 BP). While Arctic ceramic studies have focused on raw material sourcing, vessel use, and cooking performance, this research investigates forming methods and ceramic fabrics to better understand their place in the technological behavioral chain. This approach fills a gap in the literature by centering on vessel construction and offers new insights from Norton Sound sites, including type sites Iyatayet and Nukleet.

Macroscopic and petrographic …

Scale-Dependent Particle Transport Over Urban-Like Roughness In Turbulent Flow, Rae Riddle

Dissertations and Theses

This study employs direct numerical simulation (DNS) to investigate the dispersion of inertial particles in turbulent flow over three-dimensional urban-like roughness at Reτ = 200. Particles with Stokes numbers St = 5, 25, and 100 are tracked over cubic arrays with spanwise spacings Sy from 2h to 32h, where h = δ/8 and δ is the half-channel height, alongside a smooth-wall reference case. The results reveal scale-dependent particle responses characterized by three distinct regimes. First, high-inertia particles (St = 100) align strongly with mean secondary flows, exhibiting organized plumes above roughness elements. Their vertical transport peaks at intermediate spacing …

An Applied Anthropological Study Of Conflict Reduction: Fostering A Culture Of Safety At A Homeless Service Organization In Portland, Or, Katelyn Champion

Dissertations and Theses

Hygiene 4 All's (H4A) hub of operation provides hygiene services and resources to houseless individuals in Portland, OR. H4A seeks to foster a culture of safety, sanctuary, and welcome. During an internship that took place between February and December, 2025, I studied the organization's policies and practices, with a focus on how their formal and informal processes worked to lessen moments of social friction, escalations, and violent incidents. I apply theory regarding organizational management, practice theory, design, symbolic interactionism, and trauma-informed care to contextualize the research. I employed ethnographic methods, including participant observation, interviews, and document analysis, to identify themes …

Mental Health Under Pressure: A Scoping Review Of Suicide In The Dental Workforce, Man Hung, Spencer John, Nicholas Beasley, Amir Mohajeri, Connor Schwartz, Martin S. Lipsky

Institute on Aging Publications

Aims:

Suicide among healthcare professionals is a growing concern. Despite evidence of high psychological distress in dental practice, suicide in dentists remains underexplored. This scoping review systematically examined the literature on suicide and suicidal ideation among dentists, including prevalence, risk factors, and temporal trends.

Methods:

Searches of PubMed, Scopus, Web of Science, and Dentistry and Oral Sciences Source identified English-language studies reporting suicide, suicidal ideation, or related mental-health risks in dental professionals. Duplicates were removed; titles/abstracts and full texts were screened against predefined criteria. Data were extracted and thematically analysed.Results Fourteen studies met the inclusion criteria and were mostly retrospective …

More Than Just Survival Literature: The Influence Of Midcentury Lesbian Pulp Fiction On Contemporary Romance, Ash Duggirala

Book Publishing Final Research Papers

It’s no secret that queer romance is seeing an unprecedented increase in popularity. Despite making up only four percent of romance books sold in print in 2021, traditional retail outlets sold roughly 850,000 queer romance books that same year. This number is more than twice what was sold the previous year and shows a 740 percent increase from five 1 years prior. From May 2022 to May 2023, queer romance sales grew by forty percent—the 2 largest increase in any genre by more than double. Queer fiction as a whole is seeing a 3 surge in popularity, with sales in …

A Comprehensive Calibration Framework For The Northwest River Forecast Center, Geoffrey Walters, Cameron Bracken, Brad Gillies, Leah Pope, Henry Pai, Sonali Chokshi, Victor Stegemiller, Stephen King, Julie Bracken, Taylor Dixon, Multiple Additional Authors

Mathematics and Statistics Faculty Publications and Presentations

We present a comprehensive framework developed by the Northwest River Forecast Center for calibrating hydrologically diverse basins. The framework includes models for snow, soil moisture, routing, channel loss, and consumptive use. Data inputs include a wide range of open-access datasets for meteorology, land use, topography, and land cover. The framework uses conceptual hydrologic models to handle basins with various hydrologic regimes including rain-driven and snowmelt-dominated basins. We also develop a flexible automatic calibration system that can handle numerous unobservable model parameters in a computationally efficient manner. A single-basin automatic calibration run can typically be completed on a modern laptop in …

The Ladies' Home Journal: Dormant Seeds Of The Feminine Mystique Pre-Wwii, Isis Santos Villaça

University Honors Theses

At the turn of the 20th century, magazines were becoming increasingly available to the middle class. Throughout the 1890–1930s, the industry put forth an entire new iteration of publications that came to be popular with female readers. One of the most successful publications from this period, The Ladies' Home Journal, distinguished itself through its strong editorial presence on the page. The editors of the Ladies' Home Journal intended to create a "traditional" female identity that reflected domesticity in the journal, which countered the rising notions of the New Woman. Simultaneously, the publication aimed to create an educational product with …

Toxicity, Chemistry, And Public Health Relevance Of Emerging Nicotine Analog Vapes, Pods, And Pouches., Rhea Raghu, Mohana Sengupta, Karen Lin, Felix Effah, Robert M. Strongin, Irfan Rahman

Chemistry Faculty Publications and Presentations

Electronic nicotine delivery system manufacturers, such as Charlie's Holdings Inc., ECBlend, Outlaw, and NicRiver, have recently introduced nicotine analogs, such as 6-methyl nicotine, 6-MN ("Metatine"), and nicotinamide, NA ("Nixamide," "Nixodine," or "Nixotin-free base and salt") in products to circumvent the U.S. FDA's premarket tobacco product application (PMTA) requirements. Marketed as "tobacco-free," "PMTA-exempt," or "FDA-approved," these compounds now appear in oral nicotine pouches and disposable bars/vapes from brands such as Outlaw Dip, Kumi-Six, SBX, Katchmi, and Spree Bar under proprietary labels including "NoNic6," "Metatine," or "NIC-SAFE." These products often mimic the appeal of conventional nicotine delivery systems, with extensive use of …

Forest Fires Increase Vulnerability To Midwinter Rain-On-Snow Snowmelt In The Western Oregon Cascades, Sage C. Ebel, Kelly Gleason

Environmental Science and Management Faculty Publications and Presentations

Forest fires and rain-on-snow events in the seasonal snow zone of the Pacific Northwest are increasing in frequency and magnitude, yet the combined impacts of these events on snowpack and water resources remain poorly understood. We show that forest fires doubled midwinter snowmelt proportions in 2023 and 2024 compared to unburned reference sites in the western Oregon Cascades. Data from snow monitoring and micrometeorological stations installed across an elevational gradient revealed increased snowpack vulnerability during midwinter rain-on-snow events, where we observed more snowmelt per rain-on-snow event in the burned forest, indicating higher vulnerability of these snowpacks to rapid melt, increasing …

From Reclamation To Restoration: Remaking Nature On Portland's Peninsula, Theus Richards

University Honors Theses

This environmental history of the North Portland Peninsula is a critical case study of a landscape in transition, where new "natures" have been constructed through shifting projects of reclamation and restoration. The Port of Portland, who controlled the Peninsula, transformed the marshy bottomlands near the confluence of the Columbia and Willamette Rivers to accommodate greater networks of industrial infrastructure and expand their capacity for global trade. Beginning in 1967, the Port began dredging operations to fill Ramsey Lake to make way for the construction of Rivergate Industrial District. Through this process, Smith & Bybee Lakes were set aside as a …

Intrusion Detection Latency: The Neglected Metric, Sandhyarani Dash, John M. Acken

Electrical and Computer Engineering Faculty Publications and Presentations

Accuracy remains the dominant evaluation metric in Intrusion Detection System (IDS) research, yet an IDS that detects attacks too late is functionally equivalent to one that fails—particularly in Internet of Things (IoT) environments. In operational settings, the timing of detection shapes both the scope of adversarial activity and the feasibility of effective response. To the best of our knowledge, latency (the speed at which intrusions are identified) has received no systematic attention. Our analysis of published IDS papers reveals that latency is defined inconsistently—often referring to inference, communication, computation time, or combinations of these-leading to incomparable performance claims. To close …

Sweep Angle Effects Of Flow Over A Seal Whisker-Inspired Undulated Cylinder, Trevor Dunt, Christin T. Murphy, Ondrej Fercak, Raúl Bayoán Cal, Jennifer A. Franck

Mechanical and Materials Engineering Faculty Publications and Presentations

Flow over a seal whisker-inspired undulated cylinder at swept back angles is computationally investigated, comparing the vortex shedding, forces, and wake characteristics to those of an equivalent smooth geometry. Numerous prior studies have demonstrated that undulated cylinders can reduce mean drag and unsteady lift oscillations; however, none have isolated the effects of the sweep angle resulting from whisker positioning in flow. Inspired by the active control seals exert over their whiskers while navigating and sensing in unsteady aquatic environments, this study investigates how such orientation influences the hydrodynamic performance of the geometry. Simulations are performed of flow across a rigid, …

Influence Of Depressive Symptoms On Disease Activity In Patients With Rheumatoid Arthritis: The Mediating Effect Of Self-Efficacy, Wen-Wei Lin, Chieh-Tsung Yen, Hua-Lung Huang, Hanoch Livneh, Ming-Chi Lu, Wei-Jen Chen, Tzung-Yi Tsai

Leadership, Learning and Counseling Faculty Publications and Presentations

Background and Objectives:

Rheumatoid arthritis (RA) is a lifelong autoimmune disease in which joint inflammation is caused by a dysfunctional immune system. Synchronous depressive symptoms have been identified as determinants of disease progression, especially disease activity as measured using the 28-joint Disease Activity Score (DAS28). Although growing evidence suggests the interplay between depression and DAS28 in RA, related findings remain inconsistent, implying that a pivotal underlying mechanism is overlooked. Hence, we aimed to examine whether self-efficacy, the belief in one’s ability to manage health, could mediate the association between depressive symptoms and DAS28.

Materials and Methods:

Between January and October …

Pdxscholar Annual Report 2025, Julia Stone, Bertrand Robinson, Stacey Schlatter, Carolee Harrison

Library Faculty and Staff Publications and Presentations

This PDXScholar Annual Report covers the period between January 1, 2025, and December 31, 2025. This report demonstrates PDXScholar’s continued impact through readership data, new and growing collections, and comments and feedback from our users.

Properties Of The Graph Modularity Matrix And Its Applications, Benjamin Quiring, Panayot S. Vassilevski

Mathematics and Statistics Faculty Publications and Presentations

We study the popular modularity matrix and respective functional ([20]) used in connection with graph clustering and derive some properties useful when performing vertex aggregation of the associated graph. These properties are employed in the derivation of a multilevel parallel pairwise aggregation algorithm. Comparative performance results of the studied algorithm applied to graph clustering tested against the popular Louvain algorithm [4], [3] are presented. Some illustrative examples show that the resulting aggregates if used in an adaptive algebraic multigrid (AMG) are able to follow strong direction of anisotropy in finite element problems. 1.

Ross Island: An Urgent Call To Action: Toward Public Stewardship And Long-Term Responsibility, City Club Of Portland (Portland, Or.)

City Club of Portland

Located just south of downtown Portland, Ross Island is a 400-acre landscape of islands and a lagoon shaped by decades of sand and gravel mining. It is now one of the lower Willamette River’s clearest opportunities for large-scale ecological restoration, tribal stewardship, and lasting public benefit. But that opportunity is at risk under a private ownership structure in which reclamation remains unfinished and long-term stewardship has not been secured. At the same time, emerging coordination opportunities with related cleanup efforts could either advance reclamation and stewardship or create further delay and uncertainty, underscoring the need for clear state leadership. Immediate …

Drowning Prevention In The West: Who Did It Better?, Arran Hedley

University Honors Theses

This paper aims to communicate the differences on how the US, UK and Australia have approached drowning prevention in each of their nations. This paper addresses drowning statistics within each nation, national, state and local policies, access to public facilities, and the preventative strategies, swim lessons and Lifeguarding. These are the criteria each nation is being graded upon, because each criteria is a factor that can help mitigate drowning deaths.

For literature around this subject, there are many papers on each individual nation's approach to drowning but in researching there does not appear to be a comparison of the nations' …