Digital Commons Network^™

Just-In-Time Adaptive Intervention To Improve Hiv Prevention And Substance Use In Youth Experiencing Homelessness (My-Ride): Protocol Fora Randomized Controlled Trial, Diane Santa Maria, Nikhil Padhye, Michael Businelle, Natasha Slesnick, Stefani Ricondo, Marguerita Lightfoot

OHSU-PSU School of Public Health Faculty Publications and Presentations

Background: Youth who are experiencing homelessness face a higher risk of HIV infection compared to their housed peers, and suicide and overdose remain the leading causes of death among homeless youth. Just-in-Time Adaptive Interventions (JITAIs) are gaining momentum for HIV prevention and substance use research. Yet, most interventions for homeless youth have not addressed modifiable real-time factors. Objective: This paper describes the development and implementation of a randomized attention-controlled trial to assess the efficacy of motivating youth to reduce infections, disconnections, and emotional dysregulation (MY-RIDE), a JITAI to improve HIV prevention and substance use in homeless youth. Methods: This study …

What Influences Changes In Gait Spatiotemporal Parameters In Boys With Duchenne Muscular Dystrophy? Focusing On Contractures, Muscle Strength, And Gait Deviations, Anita Bagley, Susan Sienko, Cathleen E. Buckon, Kent Heberer, Loretta Staudt, Eileen Fowler, Jason Newsom, Craig Mcdonald, Michael D. Sussman

Psychology Faculty Publications and Presentations

Aim: The absence of dystrophin in patients with Duchenne Muscular Dystrophy (DMD) causes muscle fiber necrosis and fibrosis and eventually muscle weakness and contractures. This study aimed to investigate the timing and extent of lower limb contracture development and to examine how contractures, muscle strength, and kinematic (e.g., limb position or joint movement) deviations relate to longitudinal changes in gait spatiotemporal parameters.

Methods: Seventy-five ambulatory boys with DMD participated in this prospective longitudinal study of contractures, isometric muscle strength, and gait analysis. Nonlinear mixed modeling (NLMIXED) exponential growth curve models were developed to investigate the effects of contractures, muscle strength, …

Coupling The Parflow Integrated Hydrology Model Within The Nasa Land Information System: A Case Study Over The Upper Colorado River Basin, P.Eyman Abbaszadeh, Fadji Zaouna Maina, Chen Yang, Dan Rosen, Sujay Kumar, Matthew Rodell, Reed Maxwell

Civil and Environmental Engineering Faculty Publications and Presentations

Understanding, observing, and simulating Earth's water cycle is imperative for effective water resource management in the face of a changing climate. While NASA's Land Information System (LIS)/Noah-MP is widely used for land surface modeling, its ability to represent groundwater processes is limited. In contrast, the ParFlow hydrologic model explicitly simulates subsurface water movement. This study explores the effectiveness and usefulness of the newly coupled modeling framework, ParFlow-LIS/Noah-MP (PF-LIS/Noah-MP) over the Upper Colorado River Basin (UCRB). The framework integrates the strengths of both models to provide a physically based representation of surface and subsurface processes and their interactions. Unlike standalone LIS/Noah-MP, …

Biodiversity Conservation Depends On The Expansion Of Taxonomy And Systematics Research, Luis A. Ruedas, Scott L. Gardner

Biology Faculty Publications and Presentations

Despite mammals constituting fewer than 0.3% of all described species, their conservation is compelling for a number of reasons. They contribute to biodiversity and are important in maintaining and regulating ecological communities. Many mammals have significant cultural and economic value, serving as sources of food, medicine, and tourism revenue. Furthermore, the conservation of mammals often leads to the protection of entire habitats, benefiting numerous other species and preserving ecosystem services that are critical for human well- being. Humans share a unique evolutionary history with other mammal species, making their preservation important for scientific research, education, and understanding of our own …

Transit-Oriented Development And Affordable Housing: Lessons From Portland, Nathan Mcneil

PSU Transportation Seminars

The seminar will cover surveys of residents at recently built Transit-Oriented Developments (TODs) focused on affordable housing sites. This study builds off of an ongoing partnership between Portland State University and the Portland Metro regional government to understand the travel choices of people who move to recently constructed Metro supported TODs. Since 2018, Metro has focused their TOD investment on affordable housing; this survey, conducted in 2024, offers a lens into how TOD works for these low-income Portlanders, how their travel differs from prior TOD residents, and what opportunities exist to improve the TOD - affordable housing combination.

Justice Impacted Mothers: An Autoethnographic Study Exploring The Impacts Of Quality Prison Visitation With Children, Sarah E. Gore

PSU McNair Scholars Online Journal

This study explores the impacts of in-person visitation at correctional facilities and how the quality of this contact affects relationships between justice impacted mothers and their children. Little is known about these nuanced lived experiences as revealed by qualitative data and from someone who is mothering during incarceration. The literature on maternal incarceration is vast, but relies heavily on quantitative data. Existing research indicates facility visits, particularly those of high quality, offer constructive benefits such as reductions in maternal recidivism rates. However, separation during incarceration has shown higher risks for adolescent substance abuse, behavioral, and academic struggles. This study expands …

Sleeping To Support? The Interactive Effects Of Leader Sleep Quantity And Quality On Leader- And Employee-Reported Support Behaviors, Jordyn J. Leslie, Tori Crain, Rebecca M. Brossoit, Leslie B. Hammer, Todd Bodner, Cynthia D. Mohr

Psychology Faculty Publications and Presentations

Although research has documented the relationship between sleep and work outcomes among employees, less research has focused on the role of sleep among workplace leaders. We investigate the link between leader self-reported and actigraphic sleep quantity and outcomes of positive leader support behaviors (i.e., family supportive supervisor behaviors [FSSB], and sleep leadership supportive behaviors [SLSB]) reported by both the leader (N = 178) and their direct reports (N = 393). Additionally, we examine the interaction between leader sleep quantity and sleep quality indicators (i.e., insomnia symptoms, sleep dissatisfaction, and actigraphic wake after sleep onset [WASO]) on FSSB and SLSB. No …

Incorporating The Influence Of Vehicle Mix On Crash Frequency And Severity, Shahrior Pervaz, Manmohan Joshi, Tanmoy Bhowmik, Dewan Ashraful Parvez, Kai Wang, John N. Ivan, Naveen Eluru

Civil and Environmental Engineering Faculty Publications and Presentations

The current approaches for crash frequency and severity prediction in the Highway Safety Manual (HSM) do not employ vehicle mix information. In this research effort, we build advanced alternatives to HSM methods while incorporating vehicle mix information. Two model systems—(a) multivariate Poisson-lognormal model and (b) negative binomial-ordered probit fractional split model—are estimated by incorporating vehicle mix variables. The developed model systems can also capture the influence of observed and unobserved heterogeneity of different independent variables including vehicle mix variables. We estimate the models for three facility types including Urban Arterial 4-Lane Divided segments, Rural 3-Leg STOP-Controlled and Rural 4-Leg STOP-Controlled …

A Case Study On The Effectiveness Of Llms In Verification With Proof Assistants, Barış Bayazıt, Yao Li, Xujie Si

Computer Science Faculty Publications and Presentations

Large language models (LLMs) can potentially help with verification using proof assistants by automating proofs. However, it is unclear how effective LLMs are in this task. In this paper, we perform a case study based on two mature Rocq projects: the hs-to-coq tool and Verdi. We evaluate the effectiveness of LLMs in generating proofs by both quantitative and qualitative analysis. Our study finds that: (1) external dependencies and context in the same source file can significantly help proof generation; (2) LLMs perform great on small proofs but can also generate large proofs; (3) LLMs perform differently on different verification projects; …

Who Puts The "Support" In Supportive Housing? The Relationship Between Housing Staff Support And Resident Experiences, And The Potential Moderating Role Of Self-Determination, Kenna E. Dickard, Greg Townley

Psychology Faculty Publications and Presentations

The provision of residential and community‐based services for individuals with serious mental illness (SMI) has become increasingly important following the deinstitutionalization movement. Much of the existing research on supportive housing focuses on housing outcomes rather than exploring how the program helps its residents thrive in the broader community. This study draws upon data collected from 176 people with SMI residing in 16 supportive housing locations in Portland, Oregon. Analyses explore how housing staff support relates to residents' loneliness (interpersonal level), residential satisfaction (housing and neighborhood level), and sense of community (community level). Staff support was found to be related to …

Walk Portland: A Downtown Pedestrian Wayfinding Strategy And Pilot, Gena Gastaldi, Gwen Sullivan, Ryan Sullivan

PSU Transportation Seminars

Walk Portland, a partnership between the Portland Bureau of Transportation (PBOT) and Travel Portland, seeks to make it easier than ever for pedestrians to explore the city. In 2024, PBOT and Travel Portland, in partnership with sparks+sullivan, teamed up to develop a wayfinding strategic plan. In 2025, with grant funding from Travel Oregon, the team launched a short-term pilot wayfinding system to help people explore Portland as a pedestrian: the Downtown Portland Walking Route. The pilot, up from August-October 2025, is designed to see what works and what doesn’t in helping people navigate downtown. The long-term goal of this project …

Plan For Institutional Vitality And Organizational Transformation (Pivot), Office Of Academic Affairs, Research And Graduate Studies, Richard Tankersley, Shelly Chabon

Office of Academic Affairs Publications

This plan from Portland State University's Office of Academic Affairs and Research & Graduate Studies sets out the design of PIVOT, a multi-year initiative launched in response to a projected $35 million structural deficit. It states PIVOT's goals and guiding principles, reviews lessons from the university's prior budget reduction process (including concerns raised by the Faculty Senate), and describes planned modes of engagement and communication. The plan organizes the review into two parallel tracks. Track 1 evaluates academic programs across five evidence domains (student success, market demand, financial performance, mission alignment, and organizational viability) and classifies them as Grow, Sustain, …

Characterizing Meteorological Patterns For Oregon's Winter Elevated Pm2.5 Concentrations From 2000-2023, Arielle Golda Sherbak

Dissertations and Theses

Valleys and basins are uniquely susceptible to the buildup of air pollution during the wintertime due to cool, dense air pooling under favorable meteorological conditions, a common occurrence in the Intermountain West. In Oregon, wintertime anthropogenic air pollution is primarily from woodburning stoves and heaters and although efforts have been made to reduce wintertime pollution, stagnation events continue to result in decreased air quality. This analysis aims to understand the relationship between air pollution in six Oregon counties and the associated meteorology in the cool season (November-March) using a 2000-2023 climatology.

This is completed through a composite analysis using key …

An Evaluation Of Therapeutic Harm Reduction And Psilocybin-Assisted Therapy Within Oregon's Measure 109, Bodhi Norton

Dissertations and Theses

Despite psilocybin still being a Schedule I substance in the Federal Controlled Substance Act (OHA, 2022), Oregon voters passed Measure 109 in 2020, now codified into law as ORS457A, which allowed for the opening of psilocybin clinics for eligible clients. The passing of Measure 109 allowed for an adult-use model to be created, which is different from a therapeutic-use model. Advocates and Measure 109 framers employed the terms "harm reduction" and "mental health support" in order to secure the passing of Measure 109, but there is no specific definition of therapeutic harm reduction within M109 and ORS475A. To receive psilocybin …

Hybrid Publishing And The Legacy Memoir: A New Model For Preservation, Julie Kanta

Book Publishing Final Research Papers

This research investigates the advantages and limitations of hybrid publishing models for legacy-focused memoirs that integrate written narratives with visual ephemera. As traditional publishers prioritize commercial viability and self-publishing platforms present technical challenges for complex projects, legacy memoir authors face unique obstacles in preserving personal histories with professional quality while maintaining creative control.

Through an analysis of industry standards, case studies of published legacy memoirs, and an examination of current publishing models, this study identifies how hybrid publishing can address the specialized needs of legacy memoir authors in ways that traditional and self-publishing models cannot fully accommodate. The research contributes …

Faith Vs. Morality: Do Viewpoints Of Protestant Christians Attending Psu Align With Anti-Transgender Legislation Being Proposed In Oregon?, Asher Schneider

University Honors Theses

Transgender-identifying individuals living within the US face significantly higher rates of discrimination and harassment compared to the general US population. Recently, there have been thousands of legislative measures introduced with the intent of limiting the rights of Transgender and other LGBTQ identifying individuals. Christian Americans are significantly more likely than irreligious Americans to be against various rights for Transgender people, such as the ability to participate in sports or use restrooms that correlate with their self-identified gender rather than their biological sex. Research indicates that recent anti-transgender legislative measures introduced in several states is in part driven by the large …

Sex Worker Stigma, Morality And Ambivalent Sexism, Emily Kate Kinzel

Dissertations and Theses

Sex worker stigma has received limited attention in psychological research. Although stigma is often theorized to relate to moral concerns, the relationship between stigma and moral concerns has not been empirically established. This study aims to address these gaps by developing a measurement tool for attitudes towards sex workers--specifically an implicit association test (IAT)--and explore the relationships between sex worker stigma, moral concerns, and ambivalent sexism. Mock policy questions on the criminalization and punishment of sex workers were also included to approximate behavioral intentions of participants. A cross-sectional correlational study of 168 community members found evidence that both moral concerns …

Recovery Of Daily Water Levels In The Sacramento-San Joaquin Delta, 1915–2023, Serena B. Lee, Steven Dykstra, Reyna Gomez‐Sanchez, Cole Wilkenson, Ricardo Estrada, Nick Mcguire, David A. Jay, Stefan A. Talke

Civil and Environmental Engineering Faculty Publications and Presentations

This manuscript documents the data rescue, digitization, and quality assurance of archival daily maximum and minimum water levels at twenty-five sites within the Sacramento-San Joaquin Delta. The records encompass 1846 total unique years, where 915 years are newly digitized from the 1915–1985 era. The period of record for each gauge location varies from 40 to 109years (median=80 years). Quality assurance procedures and datum corrections were applied to both archival and digital records to generate a time series referenced to a common geocentric datum. Both riverine and coastal influences on mean sea level and great diurnal range are evident in the …

Data-Driven Optimization And Parameter Estimation For A Metric Graph Epidemic Model With Applications To Covid-19 Spread In Poland: A Real-World Example Of Optimization For A Challenging Rosenbrock-Type Objective Function, Hannah Kravitz, Christina Duron, Brittani Nieves, Moysey Brio

Mathematics and Statistics Faculty Publications and Presentations

In this paper, we apply data-driven optimization to estimate key parameters in a metric graph-based epidemiological model, with the aim of analyzing the effect of road networks on the geographic spread of epidemics. As a case study, we fit our model to data from the COVID-19 pandemic in Poland during 2021. Our dataset integrates county-level daily case reports, national census information, and traffic flow studies. This framework allows us to examine the relative contribution of specific travel routes over time and infer unobserved transmission patterns in the presence of incomplete or unreliable case reporting. The optimization problem that arises from …

Immigrant Selection And Global Subordination: A Critical Response To Sahar Akhtar, Alex Sager

Philosophy Faculty Publications and Presentations

In 1908, the Canadian government passed a law to prevent immigration from British India, making the right to immigrate conditional on completing a continuous journey from the country of origin. Hundreds of thousands of European immigrants easily met this stipulation; doing so was nearly impossible for British Indians. In April 1914, Canadian authorities in Vancouver, British Columbia detained 376 British Sikh, Muslim and Hindu subjects travelling on the Japanese steamship Komagata Maru from the Punjab. The Komagata Maru incident, as it has come to be known, reminds us of the toxic role of immigration policy in promulgating anti-Asian racism in …

Exploring Impacts Of Diversity Ideologies On Allyship (Intergroup Responsiveness), Fiona Nguyen

Dissertations and Theses

Colorblindness and multiculturalism are widely studied diversity ideologies that reflect prominent attitudes about how diversity should be understood and managed, as they can help predict individual behavior. Colorblindness proposes that distinct group identities should be ignored, and can be used to exclude minoritized groups and downplay racial minorities' experiences, whereas multiculturalism embraces and values group differences, can foster inclusive environments for minority groups, and leads to positive intergroup outcomes such as reduced prejudice. Despite much research dedicated to exploring the intergroup outcomes of diversity ideologies, few studies have examined their impacts on specific interpersonal interactions, particularly allyship. Research has defined …

Pathos, Fall 2025, Portland State University. Student Publications Board

Pathos

Editor: Adriana Stanzione

Costly Compliance: Stipulated Agreements In Oregon’S Nonpayment Eviction Cases, Colleen Carroll, Minji Cho, Lisa K. Bates

Urban Studies and Planning Faculty Publications and Presentations

In Oregon, stipulated agreements are court-enforced agreements that dictate the terms and conditions under which an eviction case can be dismissed. Stipulated agreements are court-enforced agreements that landlords and tenants enter into during the course of the eviction process instead of going to trial. If all the terms of the agreement are not met, the landlord can seek a swift judgment of eviction against the tenant. These types of agreements are often touted as a successful form of post-filing eviction diversion; however, very little is known about the terms and outcomes of these cases.

Fight, Flight, Freeze 2: An Update On Tenants’ Responses To Eviction Across Urban And Rural Oregon, Natalie J. Cholula, Lisa K. Bates, Alex Farrington, Marisa Zapata, Jacen Greene, Colleen Carroll

Urban Studies and Planning Faculty Publications and Presentations

In the original "Fight, Flight, Freeze" (FFF) report, the Evicted in Oregon researchers reported on the experiences of tenants who faced eviction during the COVID-19 pandemic and their access to resources. This brief provides updated analysis, now including 121 tenants with eviction experiences in Oregon. The analysis includes 13 new focus groups with tenants in both rural and urban Oregon, focusing on the type of support they received while navigating eviction. These groups represent tenants from diverse backgrounds.

Using the fight-flight-freeze framework, we analyzed tenants' reactions to eviction. We also report the resources they accessed after being threatened with eviction …

The Fate Of Recycled Water In Restored Wetlands, Punyotoya Paul

Environmental Science and Management Professional Master's Project Reports

This research investigates the hydrological fate of treated wastewater or "recycled water" used for irrigation at a restored wetland site (Thomas Dairy) near Tigard, Oregon, that is managed by Clean Water Services (CWS). CWS is interested in understanding how treated wastewater moves through plants and soil in ecosystems that might be targeted for recycled water applications. Using a water balance approach, we evaluated irrigation inputs, soil infiltration dynamics, and hydraulic conductivity measurements across three soil types with different textures and other properties. Field measurements were collected using advanced sensors (TEROS and ATMOS devices) and laboratory tools (KSAT) to quantify soil …

What Kinds Of Experiences And Activities Contribute To College Students' Sense Of Purpose? A Mixed-Methods Study, Katlyn Rochelle Viers

Dissertations and Theses

For many young people, attending college is a core marker of the transition to emerging adulthood. Some students thrive in college while others become lost, confused, or seem to be just marking their time. Some researchers have hypothesized that one thing that can help students take advantage of their college experience is if they are firmly anchored in their own life goals and sense of purpose. The primary goal of this study is to contribute to knowledge about the role of a sense of purpose in college students' development, including not only its potential benefits to their academic functioning and …

Understanding Covid-19 Message Fatigue And Reactance In A Post-Crisis Context, Lillian Hamilton Mantel

Dissertations and Theses

The COVID-19 pandemic prompted widespread public health messaging encouraging behaviors such as vaccination, mask-wearing, and staying home when sick. However, persistent exposure to these messages has sometimes produced unintended effects, including message fatigue and psychological reactance. Drawing on psychological reactance theory (PRT) and the integrative model of behavioral prediction (IMBP), this study examines the relationships between message fatigue, psychological reactance, and behavioral intentions toward three COVID-19 preventive behaviors: vaccination, masking, and staying home when sick. A survey of 348 U.S. adults assessed participants' levels of message fatigue, psychological reactance, attitudes, perceived norms, self-efficacy, response efficacy, collective efficacy, and behavioral intentions. …

Beyond Opacity: Distributed Ledger Technology As A Catalyst For Carbon Credit Market Integrity, Stanton Heister, Felix Kin Peng Hui, David Ian Wilson, Yaakov Anker

Business Faculty Publications and Presentations

The 2015 Paris Agreement paved the way for the carbon trade economy, which has since evolved but has not attained a substantial magnitude. While carbon credit exchange is a critical mechanism for achieving global climate targets, it faces persistent challenges related to transparency, double-counting, and verification. This paper examines how Distributed Ledger Technology (DLT) can address these limitations by providing immutable transaction records, automated verification through digitally encoded smart contracts, and increased market efficiency. To assess DLT’s strategic potential for leveraging the carbon markets and, more explicitly, whether its implementation can reduce transaction costs and enhance market integrity, three alternative …

Prospective Associations Among Loneliness And Health For Servicemembers: Perceived Helplessness And Negative Coping Appraisal As Explanatory Mechanisms, Sarah N. Arpin, Cynthia D. Mohr, Todd Bodner, Leslie B. Hammer, James D. Lee

Psychology Faculty Publications and Presentations

Links between loneliness and health are robust, though evidence for associations with alcohol use is mixed. Previous research has supported perceived stress as a predictor of alcohol use and as a pathway through which loneliness impacts health over time. Yet findings are primarily limited to civilian samples, and less is known about how loneliness relates to stress and health among service members. The current study explores prospective associations among loneliness, stress, and health (i.e., sleep, alcohol misuse, and psychological distress) within a sample of mostly male service members. We examine two dimensions of perceived stress, perceived helplessness and negative coping …

The Effect Of Mesoscale Frontal Waves On Landfalling Atmospheric Rivers And Their Associated Precipitation Over The Green River Watershed, Washington, Joseph Michael Riedl

Dissertations and Theses

In this study, the effect of mesoscale frontal waves (MFWs) on extreme precipitation (EP) in the Upper Green River Watershed (UGRW), Washington is investigated. 205 EP days (>95th percentile) are identified in the UGRW between the years 1980 and 2021. To characterize the range of large-scale meteorological conditions associated with EP days, the self-organizing map (SOM) approach is used to cluster daily integrated water vapor transport (IVT) on EP days. To further diagnose the meteorological drivers, composites of several other diagnostic fields are constructed for each SOM node and the preceding days. Together, these results illustrate common orientations of …