Digital Commons Network^™

A Generalized Lehmer Conjecture For The Trace Of T ₃, Liubomir Chiriac, Erin Williams

Mathematics and Statistics Faculty Publications and Presentations

The expectation that Ramanujan’s tau function does not vanish, commonly known as Lehmer’s Conjecture, has inspired several extensions to broader settings. In this paper, we focus on one such direction, proposed by Rouse, concerning the non-vanishing of traces of Hecke operators Tn. We refine an algorithm originally introduced by Rouse to resolve the case n = 2, and, together with tools from our earlier work on the case n = 3 in level one, we settle the conjecture for T₃ in full generality. We also discuss an implication of our result for the non-vanishing of all coefficients of the …

Obesity Vs. Overweight Status: Differential Predictions To Poly-Substance Use In Young Adulthood, H. Isabella Lanza, Kailey Waller, Lalaine Sevillano

School of Social Work Faculty Publications and Presentations

Background:

Though past research has identified links between higher weight status and substance use in young adulthood, prospective studies are scarce and mixed, the role of higher weight status on vaping is less clear, and little empirical work has examined differences between obesity vs. overweight on poly-substance use. The current study assessed the role of weight status on poly-substance use trajectories across young adulthood.Methods1,303 young adults (20.5 ± 2.3 years; 63% female; 41% Latina/o/x, 30% Asian-American/Asian, 18% Caucasian/White) from a public, urban university were surveyed at six-month intervals from spring 2021 (W1) to spring 2023 (W5). Weight status was measured …

Friends In Our Lives: Perspectives Of Young People Who Participated In A Professional Mentoring Program, Kristian Jones, Karryn Satchell, Lakindra Mitchell Dove, Julissa Muñiz, Erik Hulman, J Mark Eddy, Kevin Haggerty, Deborah Cohen, Martie Skinner, Koren Hanson

School of Social Work Faculty Publications and Presentations

Mentoring programs are popular interventions to support holistic development for young people. One specific model of mentoring that has emerged over the past few decades in the United States is professional mentoring. Research has illustrated that this model of mentoring may be particularly helpful for young people who could benefit from extra support in their lives that a volunteer mentoring program does not have the capacity to provide. Despite the emerging utilization of professional mentoring programs, little is known about the ideal characteristics of a professional mentor and young people's experiences in these professional mentoring programs. This study interviewed 12 …

Unshrouding Narratives, Beliefs, And Practices Related To The Aye-Aye (Daubentonia Madagascariensis) In Eastern Madagascar, Alessio Anania, Fiona Besnard, Delaid C. Rasamisoa, Erito Andriantsitoherina, Jean Fidele Mosa, Marco Campera, Megan Phelps, Dean Gibson, Timothy M. Eppley, Giuseppe Donati

Anthropology Faculty Publications and Presentations

Ethnoprimatology emphasizes the complex sociocultural dimensions of human-alloprimate interactions, often overlooked in conservation practices and narratives shaped by ecological perspectives alone. In Madagascar, lemurs are deeply embedded in local traditions structured around taboos, legends, and kinship beliefs. Among them, the aye-aye ( Daubentonia madagascariensis ) is frequently subject to a narrative portraying it as an evil animal, an omen, or a harbinger of misfortune. Yet, cultural representations of the aye-aye across Madagascar are far more diverse. While some reports describe ritual killings, others recount respectful mortuary practices bestowed upon these primates. We explored the beliefs, narratives, and practices associated with …

Understanding The Role Of Sentiment And Emotion For Predicting Forced Displacement, Helge Marahrens, Ameeta Agrawal, Ali Arab, Katharine Donato, Yaguang Liu, Nathan Wycoff, Mohamed Ahmed, Colin Hwang, Lina Laghzaoui, Kate Liggio, Multiple Additional Authors

Computer Science Faculty Publications and Presentations

Digital trace data play an important role determining where and when people will move during migration crises because of their detailed temporal and spatial granularity. Yet, identifying variables that reliably serve as early indicators of movement remains a challenging task. Within this context, we conduct an in-depth analysis of two types of variables that can be constructed from social media data – sentiment and emotion. Sentiment is conceptually broad and easier to detect from social media posts, while emotion is conceptually nuanced and more difficult to determine. We investigate the potential of both sentiment and emotion of Twitter/X posts as …

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 …

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

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. …

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 …

Dilemmas Encountered While Planning Social And/Or Political Elementary Mathematics Tasks, Amanda Sugimoto, Simon Byeonguk Han, Courtney Koestler, Eva Thanheiser, Mathew Felton-Koestler, Molly Robinson

Mathematics and Statistics Faculty Publications and Presentations

A mathematical task rooted in social and/or political contexts has the potential to engage students in exploring their own real-ities and learning about the realities of others while building their mathematical knowledge. While there are planning and in-structional practices recommended for these types of tasks, no single practice can fully capture the nuances and challenges thatteachers might encounter. Therefore, this study identified dilemmas encountered by a team of mathematics education research-ers while planning a mathematical task rooted in social and/or political contexts. Using qualitative analysis, the researchersidentified three planning dilemmas: (a) what social and/or political goal to establish, (b) how …

(De)Centralized Water Futures: Key Dimensions Of Infrastructure, Governance, And Operations, Alicia Dailey Cooperman, Jenny Linder Rempel, Ellis Adjei Adams, Alida Cantor, Manuela Muñoz Fuerte, Jeremiah Osborne-Gowey, Nicole J. Wilson, Cassandra L. Workman, Melissa Beresford, Leila M. Harris, Multiple Additional Authors

Geography Faculty Publications and Presentations

Water system centralization and decentralization have variously been promoted as key to achieving household water security and Sustainable Development Goal 6.1. We argue that the lack of specificity with which scholars and practitioners use the terms centralization and decentralization limits our understanding of different water system configurations and their impacts. In this Primer, we provide a framework for thinking about levels of (de)centralization across three linked system dimensions: infrastructure, governance, and operations and maintenance. We encourage those analyzing water systems to characterize (de)centralization with respect to these multiple dimensions, as well as the system's broader political-economic and hydro-climatic contexts. Emphasizing …

Demographic And Economic Implications Of Alternative Us Immigration Policies, Guizhen Ma, Erin Trouth Hofmann, Ethan Sharygin

Publications, Reports and Presentations

Due to the United States’ decades-long stalemate in federal immigration policy-making, major institutional forecasts of the U.S. population have not included assumptions about changes in immigration policy. However, the 2016 election of President Donald Trump and the COVID-19 pandemic demonstrated just how much policy shifts can affect immigration flows, with substantial implications for the country’s demographic future. We created national-level population and economic projections through 2060 using nine different immigration policy scenarios, reflecting differences in both the scale of immigration allowed and the mix of immigrant visas issued (family reunification versus economic and labor visas). The projections highlight the dramatically …

Mechanistic Rationale For Toxic Aerosol Formation From Vaping And Dabbing With A Focus On Ketene Formation From Semi-Synthetic Cannabinoids, Kaelas Ryan Munger

Dissertations and Theses

Cannabis vaping is a relatively new route of administration that is increasingly common among youth and young adults. Cannabis vaping has been associated with cases of acute lung injury, especially among youth, and most often involves the heating and aerosolization of high-potency products having cannabinoid concentrations of ~ 50 % - 98 % w/w. Proponents argue that vaping is safer than smoking due to the characteristically lower temperatures and fewer plant materials. However, the extreme cannabinoid concentrations, along with non-natural formulations having undisclosed additives, require studies of the health effects of these products. Despite the popularity of cannabis concentrate vaping, …

The Effects Of Tfeα And Promoter Sequence On Early Events In Archaeal Transcription Initiation, Madolyn Toli

Dissertations and Theses

Expression of genes is dependent on promoter sequences in DNA, which direct transcription by RNA polymerase. Transcription factors interact with promoters and RNAP and are often conserved and are essential for proper gene expression. In this thesis, a functional region of archaeal TFEα, homologous to eukaryotic TFIIEα, has been identified, and specific amino acids in these regions have been determined to have significant importance in TFEα's ability to promote transcription in early initiation. All three Domains of life encode a 16S rRNA promoter, which is responsible for production of the 16S portion of ribosome. Transcription with this promoter is not …

Stayin' Alive (Even Without Oxygen): Retinal Development In Austrofundulus Limnaeus, Carmen Zecilia Rodriguez

Dissertations and Theses

The vertebrate eye is one of the most metabolically active organs in the body and is particularly sensitive to environmental stressors such as oxygen deprivation. Understanding how eye development proceeds under such conditions can provide critical insights into mechanisms of cellular resilience, tissue organization, and developmental plasticity. The annual killifish Austrofundulus limnaeus represents a unique model for investigating these processes due to its remarkable tolerance to anoxia during embryogenesis. However, the wild-type form is heavily pigmented, limiting the effectiveness of traditional imaging techniques for studying eye development. This thesis characterizes eye development and anoxia resilience in both wild-type and melanin-deficient …

Controlling The Curriculum: A Content Analysis Of Prageru's Children's Educational Material, Heather Katherine Costa

Dissertations and Theses

PragerU is a conservative media outlet founded by Dennis Prager in 2009 that aims to insert new conservative content into existing U.S. public school curricula. While conservative activist groups have attempted for decades to alter educational content and policy, PragerU is attempting to directly influence public school curricula by having their materials authorized for use in public schools.

This study utilizes qualitative content analysis to understand the meaning behind PragerU's content, using a sample of 39 videos, targeted at students in grades 6 and higher. The transcript data were analyzed to address two research questions: 1) What are the key …

A New Era Of Zines: Taking Lessons From The Past To Combat Intellectual And Political Fascism, Catherine Kane

Book Publishing Final Research Papers

Zines have long functioned as a way to circumvent the traditional gatekeepers of news, art, mainstream narratives, and publishing. They are largely non-commercial, and their emphasis is to put the means of production and distribution directly into the hands of the individual. Although their roots are in DIY, proletariat culture, they are now the subject of study in museums, libraries, and higher education, and have been co-opted by big brands, media outlets, and publishing houses—the institutions they originally sought to undermine.

In their most authentic form, zines have represented free thinking and speech, while giving individuals and communities a rallying …

Proceedings Of The 33rd United States – Japan Bridge Engineering Workshop, David Y. Yang

Civil and Environmental Engineering Faculty Publications and Presentations

This report summarizes the 33rd United States–Japan Bridge Engineering Workshop, an event that convenes bridge engineers from both countries. The workshop serves as a platform to exchange innovative ideas and technologies, as well as to share crucial knowledge and lessons learned, all with the aim of advancing bridge engineering. The 33rd workshop specifically addressed transportation asset management and seismic retrofitting, two subjects of increasing importance to both the United States and Japan. The report details the workshop's discussions on topics relevant to bridge engineers.

Hydrosocial Ocean Commons: Offshore Wind Energy In Oregon, Bryce Ashlyn Sprauer

Dissertations and Theses

The ocean has been culturally and legally conceptualized as a commons, a space of subsistence inherited by all. Enclosure or privatization creates overlapping jurisdictions of ocean space. The ocean is also the world's most significant carbon capture, absorbing billions of tons of anthropogenic carbon dioxide since the Industrial Revolution. Now, the ocean offers an additional opportunity to decarbonize energy production and reduce greenhouse gas emissions through 'new frontiers' of offshore wind technology; however, this potential is entangled within neoliberalism. Offshore wind is entering a fragmented legal landscape where the social-legal process of ocean jurisdiction remains contested. As the "new frontier" …

Projections Of Lightning‐Ignited Wildfire Risk In The Western United States, Dmitri A. Kalashnikov, John T. Abatzoglou, Frances V. Davenport, Zachary M. Labe, Paul C. Loikith, Danielle Touma, Deepti Singh

Geography Faculty Publications and Presentations

Cloud‐to‐ground (CG) lightning is a major source of summer wildfire ignition in the western United States (WUS). However, future projections of lightning are uncertain since lightning is not directly simulated by most global climate models. To address this issue, we use convolutional neural network (CNN)‐based parameterizations of daily June‐September CG lightning. CNN parameterizations of daily CG lightning occurrence at each grid cell use fields of three thermodynamic variables—ratio of surface Moist Static Energy (MSE) to 500 hPa saturation MSE, 700–500 hPa lapse rate, and 500 hPa relative humidity. Applying these parameterizations to the Community Earth System Model version 2 Large …

Evaluation Of Fano Resonance In Silver Nanotriangles And Complementary Triangular Apertures For Enhanced Refractive Index Sensing, Nabila Islam

Dissertations and Theses

This thesis presents a detailed investigation of plasmonic sensors based on silver (Ag) nanotriangles, focusing on the interaction of plasmonic mode with waveguide modes to achieve Fano resonance for enhanced refractive index sensitivity. For this purpose, Ag nanotriangles were chemically synthesized and were on indium tin oxide (ITO)-coated glass. The samples were illuminated with laser light of various wavelengths and polarization to excite surface plasmon in the nanotriangle. Observation and characterization of their plasmonic behavior was done experimentally using Photoemission Electron Microscopy (PEEM). Numerical simulations using the Finite Element Method (FEM) were performed that agreed with these experimental results and …

Cinematic Empathy: Autistic Interpretation Of Social Cues In Narrative Film, Lux Gomez

University Honors Theses

From research and lived experience we can see a pattern of Autistic people engaging and forming connection with emotional narratives in media, despite stereotypes suggesting they lack empathy or theory of mind. This mixed-methods study sought to lay the groundwork and start preliminary investigation into how film’s structured formal elements may facilitate autistic viewers’ interpretation of social cues that typically challenge autistic-allistic (nonautistic) communication in real life. A sample of 22 participants (13 autistic, 9 allistic) viewed five film scenes depicting lying, flirting, sarcasm, exposition, and flat affect and completed a survey. Both quantitative and qualitative data were analyzed. While …

Ronald E. Mcnair Research Symposium Presentation Schedule 2025, Mcnair Scholars Program

McNair Symposium

This is the presentation schedule for the 23rd Undergraduate Ronald E. McNair Research Symposium 2025.

Ronald E. Mcnair Scholars Program Profiles And Abstracts 2025, Mcnair Scholars Program

McNair Symposium

This publication provides research abstracts and biographies of 2025 McNair scholars and their mentors.

Trauma-Born Generations And Intergenerational Conflict: A Study Of Tensions In The Contemporary South Korean, Daihyun Kim

Dissertations and Theses

This paper analyzes how traumatic events that have been repeated in modern Korean history have affected each generation's identity and emotional structure, and how intergenerational conflicts arise, are structured, and reproduced. This study divides the groups of people born in the period from "The Liberation" in 1945 to 2025 into four generations: the Industrialization Generation, the Democratization Generation, the Capitalist Generation, and the Isolation Generation. Each generation has remembered major historical events such as the Korean War, the Gwangju Democratization Movement, the IMF foreign exchange crisis, the Sewol ferry and the Itaewon disaster in a unique way, thereby forming an …

Voice As A Biomarker: Exploratory Analysis For Benign And Malignant Vocal Fold Lesions, Phillip Jenkins, Rylan Harrison, Steven Bedrick, Lisa Karstens, Bridge2ai-Voice Consortium

Mathematics and Statistics Faculty Publications and Presentations

Benign and malignant vocal fold lesions can alter voice quality and lead to significant morbidity or, in the case of malignancy, mortality. Early, noninvasive identification of these lesions using voice as a biomarker may improve diagnostic access and outcomes. In this study, we analyzed data from the initial release of the Bridge2AI-Voice dataset to evaluate which acoustic features best distinguish laryngeal cancer and benign vocal fold lesions from other vocal pathologies and healthy voice function. Seven diagnostic cohorts were grouped into two analyses: the first included participants with laryngeal cancer, benign lesions, or no voice disorder; the second included those …