Digital Commons Network^™

Key Issues For Speed Safety Cameras: Results From A Semi-Structured Interview Of Agencies In The United States, Sophia Semensky, Miguel Figliozzi

Civil and Environmental Engineering Faculty Publications and Presentations

Speed safety cameras (SSCs) are a recognized countermeasure for targeting speeding-related crashes, injuries, and fatalities. SSCs have been introduced in various cities and are steadily expanding in use both in the U.S. and internationally. The extensive literature review of domestic and international documents and research papers reveals that the U.S. has been comparatively slow to adopt SSCs, with some other countries implementing these systems more extensively and earlier. Many local agencies are eager to learn SSC best practices and implementation lessons within the U.S. context. In this research, key issues related to SSC implementation are explored through semi-structured interviews with …

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 …

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 …

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 …

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 …

Collaborating To Create A Research Training Program For Underrepresented Students: Insights And Strategies For Developing And Sustaining A Multi-Institutional Consortium, Mackenzie J. Gray, Dara Shifrer, De’Sha S. Wolf, Olivia M. Ainsworth, Rosemary A. Fama, Roberto P. Anitori, Ernest Blackwell, Tracey K. Burke, Carlos J. Crespo, Derek Helsham, Travis Kibota, Alissa Leavitt, Beylul Solomon, Thomas E. Keller

Sociology Faculty Publications and Presentations

Introduction

In 2014, the National Institutes of Health (NIH) invested in the Building Infrastructure Leading to Diversity (BUILD) initiative to enhance diversity in the biomedical research workforce. As one of ten grantees nationwide, the BUILD EXITO project at Portland State University established an institutionally and geographically diverse consortium including local community colleges, a research-intensive medical institution, and universities and community colleges around the Pacific Rim. The goal of this collaboration was to support comprehensive research training for undergraduates from backgrounds historically underrepresented in the biomedical workforce. This manuscript aims to provide insights into creating and sustaining a large-scale multi-institutional consortium.MethodsUsing …

Measuring Indigenous Cultural Strengths: A Systematic Review Of A Decade Of Approaches., Melissa L. Walls, Danica Love Brown, Victoria M. O'Keefe, Evan J. White, Miigis Gonzalez, Ivy Blackmore, Tara L. Maudrie, Meenakshi Richardson, Timothy R. Werwie, Hariata G Tai Rakena, Multiple Additional Authors

School of Social Work Faculty Publications and Presentations

Indigenous Peoples experience severe health inequities rooted in experiences of colonization. Calls for strengths-based, culturally grounded research and practice to redress these harms continue to grow. This systematic review assesses how Indigenous "culture" has been quantified in research across the globe over a 10-year span. Following PRISMA guidelines, we searched four databases (2013-2023) for peer-reviewed, English-language articles featuring quantitative measures of Indigenous culture as a positive/protective factor. Data were extracted via a double coding system to assess cultural domains, operationalization strategies, and sociodemographic characteristics of reviewed studies. We reviewed 279 records and identified 461 measures, 289 of which were unique. …

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.

Carver, Kafka, And Woolf On Re-Enchanting Modernity, Zachary Davis

University Honors Theses

Though removed from the time of the modernists, Raymond Carver shares similar interests with Woolf and Kafka in his late century story "Cathedral," as he investigates art's capacity for creating meaning, or "re-enchanting." While Carver investigates the function of art in a chaotic world, his story does not feature a central artist figure or a hierarchical social structure surrounding the artistic process, but rather an organic artistic experience which creates community among the characters. In this way, "Cathedral" can be seen as a mediation between Woolf's and Kafka's distinct, if not opposing, reactions to Matthew Arnold's prophecy that "most of …

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' …

Analysis Of Novel Cannabis Products Labeled As Containing Thc-Jd, Kaelas R. Munger, Carlton C. B. Bone, Killian M. Anreise, Robert M. Strongin

Chemistry Faculty Publications and Presentations

Objective:

THC-JD (tetrahydrocannabioctyl) is a semi-synthetic cannabinoid with an eight-carbon C3 side chain, present in only trace amounts in hemp, requiring synthesis for commercial use. It has been promoted as potentially 19 times more potent than delta-9-THC, consistent with enhanced CB1 receptor affinities for cannabinoids with 7-8 carbon C3 side chains. While one peer-reviewed report identified THC-JD (tetrahydrocannabioctyl) in Japanese online products, an anecdotal report from the U.S. suggests mislabeling. Method: To inform regulatory efforts and consumer awareness and to address these discrepancies, this study chemically analyzed five U.S. commercial cannabis vape products marketed as containing THC-JD. Results: Utilizing GC-MS …

Pressed For Time: The Role Of Time Pressure And Attentional Awareness On The Mental Health Of Employed Informal Dementia Caregivers, Kate Bishop

University Honors Theses

Informal caregivers for individuals with Alzheimer’s and related dementias (ADRD) experience increased time demands and poorer well-being, especially when caregiving is combined with paid employment. Subjective feelings of high time pressure, which include feeling rushed and short on time, relate to poorer self-reported measures of mental health more than objective task load. Attentional awareness is one of the fundamental components of mindfulness alongside nonjudgmental acceptance; it has been linked with more optimal mental health and feelings of having enough time. This cross-sectional study examined whether higher levels of perceived time pressure would relate to poorer self-reported mental health functioning and …

Inertia Versus Adaptation: Relational Resilience In Buyer-Supplier Relationships Facing Extreme Disruption, Jordan M. Barker, Anne E. Dohmen, Carlos Mena

Business Faculty Publications and Presentations

This research introduces the concept of relational resilience, which reflects the dynamic capacity of a buyer–supplier relationship to absorb external shocks and continue its core function of exchange. Guided by structural inertia theory (SIT), the research explores how relationship age, exchange volume, and multiplexity contribute to relational resilience across both stable periods and times of extreme disruption. Using a large-scale panel dataset of buyer–supplier relationships and the COVID-19 pandemic as an exogenous shock, the findings reveal that relational resilience is enhanced by all three mechanisms, but extreme disruptions lessen the protective value of relationship age and exchange volume while strengthening …

Using Soil-Plant-Atmosphere Continuum Modeling To Evaluate Drought Tolerance In The Urban Environment, Md Jahidul Islam, Samantha Hartzell

Urban Ecosystem Research Consortium of Portland/Vancouver

Global climate change expansion in the past few years is affecting the urban environment in the Pacific Northwest. The Mediterranean climate, combined with climate change, is making conditions more severe for plant function and ecosystem services through increasing soil moisture limitation. As a result, identifying the changes in plant physiological processes caused by soil moisture limitation is important for conservation and restoration initiatives.

This research uses the Photo3 model to quantify gas exchange, plant water use, and water use efficiency under urban environmental conditions in Portland, Oregon. Meteorological data required for the model simulation were obtained from the weather station …

Turning Point: Usa, 2020 Election Denialism And Its Consequences, Zack George

University Honors Theses

Current President of the United States, Donald Trump interrupted the peaceful transfer for power for the first time in 250 years. In the typical study of the events surrounding this interruption, much focus is made on the events of the January 6th Capitol Riot. Firstly, this thesis examines the 2 months in the leadup to the 2020 election and how the Trump administration acquired and attempted to execute their plans to commit a self-coup, keeping the administration in power in the face of the election victory and transition to the Presidency of election-winner, Joe Biden. Secondarily, it will contextualize and …

Using A Place-Based Harms Typology To Inform Community Practice And Research: Illustrative Cases And Contexts, Jason Sawyer, Greer A. Hamilton, Amie Thurber, Amy Krings

School of Social Work Faculty Publications and Presentations

Place-based harms comprise direct threats to community wellbeing within the spaces where people live. These harms, rooted in structural and cultural violence, are codified in policies and programs that contribute to poverty, homelessness, over-policing and surveillance, and environmental injustices. This paper argues, although community practitioners are needed to work alongside communities impacted by place-based harms, there are critical tensions and tradeoffs embedded within the place-based strategies. To illustrate this, we draw from the Contested Places Typology and present cases that highlight key tensions, tradeoffs, and nuances associated with its six approaches: (1) Reparation, (2) Remembrance, (3) Regeneration, (4) Resistance, (5) …

Fentanyl Use Among People Who Inject Drugs In Two Large Pacific Northwest Metropolitan Areas., Lauren Lipira, Sara N. Glick, Courtney Moreno, Lalaine Sevillano, Matthew A. Town, Timothy W. Menza

Regional Research Institute for Human Services

Background

We examined fentanyl use and outcomes among people who inject drugs (PWID) in the urban Pacific Northwest (PNW).

Methods We conducted secondary analysis of data from the 2022 National HIV Behavioral Surveillance PWID cycle from Portland, OR and Seattle, WA. We calculated proportions of any fentanyl, injection fentanyl, non-injection fentanyl, and street pill use. Next, we compared characteristics, behaviors, and outcomes by any fentanyl use. Finally, we estimated adjusted relative risk (aRR) of overdose outcomes associated with fentanyl use and injecting less associated with type of street pill use.

Results

Among 835 PWID, 76% reported fentanyl use, 47% injection …

Building Connections With Graduate Students Through Credit-Bearing Instruction, Michelle Desilets, Kimberly Pendell

Library Faculty and Staff Publications and Presentations

Graduate students often need support with research skills and other professional development that is under-recognized by their programs. Librarians play a key role in helping students fill in these gaps. This case study reviews student feedback on a librarian-developed and -delivered credit-bearing course. The course, Library Research and Scholarly Communication Fundamentals, is offered to graduate students across all disciplines. The curriculum is flexible and applicable to each student’s research, covering topics such as researching literature, citation and data management, and publishing in scholarly journals. The course has generated positive and constructive feedback from students, encompassing themes of self-efficacy, improved research …

Madwoman Makings: The Modern Girl As An Object Of Fear And Fascination In Unno Jūza’S "Mrs. Hirumi's Refrigeration Bag", Eliza Joy Mortimer

University Honors Theses

This thesis argues that Unno Jūza's 1937 short story "Mrs. Hirumi's Refrigeration Bag" uses the sensational tropes of deviant detective fiction to both stage and interrogate interwar Japanese anxieties around gender, science, and modernity. Focusing on the figure of Mrs. Hirumi—a scientifically empowered and sexually assertive female plastic surgeon who dismembers and cryogenically preserves her husband—the author reads her as a radical iteration of the Japanese Modern Girl character. By drawing on scholarship on deviant detective fiction, imperial modernity, and Kazue Harada's concept of (re)productivity, this thesis demonstrates how the short story both reproduces misogynistic criminological discourse and unsettles heteronormative …

Business Capstone Review: An Analysis Of A Local School Foundation, Emily Carlile

University Honors Theses

This capstone review thesis analyzes a school foundation in the Portland Metro Area. The capstone project was designed to conduct research to support the local school foundation, specifically the 18-35 demographic, and to increase overall funding. The project required navigating a compressed ten week timeline and coordinating a large, eleven member team to meet our client’s complex expectations. Beyond our hurdles with research, we managed multiple clients' expectations during the presentation, which were not part of the original consulting process. To maintain the project workload, we communicated with the client through a weekly email, four presentations, and a final recommendation …

In The Wake Of Usaid Cuts, We Can Create A Demographic And Health Survey Program Founded On More Equitable Data Infrastructure And Stronger Research Integrity., Jasmin Abdel Ghany, Aasli A. Nur, Kerry L D Macquarrie, Joshua Wilde, Elizabeth A. Sully, Mahesh Karra, Ursula Gazeley, Ben M. John, Livia Montana

Publications, Reports and Presentations

t ’ s I n o w b een more than a year since President Trump’s dismantling of the US Agency for International Development (USAID), which led to the closure of its Demographic and Health Survey (DHS) Program. In place for decades, the DHS Program produced and shared, free of charge, some of the highest-quality data on population health in low- and middle-income countries (LMICs). Our own analysis found at least 9,000 published studies, reports, and book chapters based on more than 400 DHS surveys in almost 100 countries (Fig. 1).* And the DHS has been instrumental in improving the …

Crispr Spacers Reveal Diverse And Abundant Thermococcales Viruses In Hydrothermal Vents, Ryan Catchpole, Justin Mclean, Emily St John, Anna-Louise Reysenbach, Mart Krupovic, Michael P. Terns

Biology Faculty Publications and Presentations

Viruses are the most pervasive biological entities on Earth and they profoundly shape host ecology and evolution. However, for many microbial lineages, knowledge of their viromes remains limited, especially for those inhabiting remote environments, including deep-sea ecosystems. Here, we leverage one of the most extensively cultivated and genomically characterized archaeal lineages, the Thermococcales, to identify novel viral genomes. By utilizing CRISPR spacers from isolates and spacer arrays reconstructed from metagenomes, we mined mobile genetic elements (MGEs) in 1,172 publicly available and newly sequenced hydrothermal vent metagenomic datasets. Comparative genomics and identification of viral hallmark proteins revealed 620 viral genomes across …

Characterizing Indoor Surface Voc Contamination After The 2025 Los Angeles Fires, Brett W. Stinson, Emily Lei, Elliott T. Gall

Mechanical and Materials Engineering Faculty Publications and Presentations

We quantify volatile organic compound (VOC) emissions from indoor surface swabs and portable air cleaner (PAC) filters collected in a home 30 days after the 2025 Los Angeles wildland-urban interface (WUI) fires. We calculate emissions for 17 fire-relevant compounds. Surface emissions exceeded those of clean controls, and emissions from a windowsill in a room without a PAC were ∼15× and ∼2× higher for benzene and toluene, respectively, than rates reported in the literature for comparable materials unaffected by smoke/soot. Particle filters installed in PACs at the start of the fire emitted aromatics at rates comparable to those reported in a …

Beyond Rationality: The Role Of Emotions In Communicative Planning, Minji Cho

Urban Studies and Planning Faculty Publications and Presentations

The impact of emotional dynamics has been overlooked within the field of planning. Traditional communicative planning theory, rooted in Habermas’ model of communication, typically propose that emotions should be managed to facilitate rational discussions that lead to logical agreements. Conversely, some research contends that emotions are not illogical or hazardous elements to be restrained during deliberation; instead, they are a topic requiring thorough investigation to create improved public forums. We investigate this tension by analysing facework during a land-use dispute at at the Gongjin Elementary School site in Seoul, South Korea. Our analysis reveals that facework not only impedes the …

Nonenzymatic Glucose Biosensor Based On Selective Reduction Of Silver Ions, Maryam Sarlak, Shankar B. Rananavare

Chemistry Faculty Publications and Presentations

A nonenzymatic conductivity-based glucose biosensor, reported here, designed for potential noninvasive measurement in accessible biofluids such as saliva, sweat, and tears. The sensor exploits a classic Tollens’ silvering process that deposits metallic silver on a sensitized surface via a quantitative, selective reduction of silver ions by glucose. Of the two surface sensitization methods used, the self-assembled bifunctional thiol/silane surfactant yields a more stable and sensitive sensor than tin(II) chloride. The conductometric sensor consists of two spiral interdigitated silver electrodes fabricated by lithography and wet etching. The sensor impedance changes after selective metallic silver deposition between the electrodes. The sensor exhibits …

Platforms For The Development And Sustainability Of Practice Research In Social Work: An International Cross-Case Analysis, Bowen Mcbeath, Michael J. Austin, Ilse Julkunen, Maija Jappinen, Lynette Joubert, Ralph Hampson, Rosaleen Ow, Lars Uggerhoj

School of Social Work Faculty Publications and Presentations

Purpose:

This paper presents an institutional and organizational comparative case analysis of practice research platforms in social work, which are institutionally embedded partnerships of university-based research centers, organizations delivering social services and healthcare, and other knowledge intermediaries that connect social work practice and research.

Methods:

An institutional and organizational comparative case analysis is presented concerning four practice research platforms from the USA, Finland, Australia, and Singapore.

Results:

We identify similarities and differences in the platforms’ purpose and basic goals, administration and financing, and substantive and methodological foci in the development of social work practice research studies.

Discussion:

We conclude by …

Implementation Of Soil Improvement Techniques In The Dhaka Mass Rapid Transit Project A Comprehensive Case Study, Shoma Hore, Mosharof Al Alim, Maliha Farjana, Monir Hossain, Ripon Hore

Civil and Environmental Engineering Faculty Publications and Presentations

This paper evaluates Sand Compaction Pile (SCP) and Dynamic Compaction (DC) methods for enhancing soft soil in the Dhaka Mass Rapid Transit (MRT) project. Targeted interventions were required for the stratified soil profile, consisting of liquefiable sand (3–5 m thick) over soft clay (SPT ∼5): dynamic compaction for densifying the sand layer and soil-cement piles for stabilizing the underlying clay. Post-treatment Standard Penetration Test (SPT) values indicated that DC significantly improved the sand layer (SPT rose to 15–25) while SCP effectively strengthened the clay (SPT increased to 8–12). The Tongi-to-Uttara section (CP01) simultaneously addressed liquefaction concerns and settlement issues through …