Digital Commons Network^™

Pdxscholar Multi-Year Annual Report (2022-2024), Julia Stone, Sherry Buchanan, Bertrand Robinson, Stacey Schlatter, Carolee Harrison

Library Faculty and Staff Publications and Presentations

We are excited to share our 2022-2024 PDXScholar Multi-Year Annual Report. This multi-year report covers the period between January 1, 2022 and December 31, 2024. PDXScholar, Portland State University's institutional repository, provides access to the scholarly and creative output of PSU faculty, students, and staff. In this report, we aim to highlight PDXScholar’s growth and impact through readership data, new content and collections, and feedback from our users.

Layout-Aware Quantum Circuitry And Algorithmic Extensions To Grover's Algorithm, Ali Al-Bayaty

Dissertations and Theses

Lov K. Grover introduced, in 1996, Grover's algorithm as a quantum search algorithm to find all solutions for quantum oracles representing classical problems. My research observed that the Grover diffusion operator of Grover's algorithm gives wrong solutions when Boolean oracles are designed in some logical structures. Therefore, I invented the new "controlled-diffusion operator" for Boolean oracles as a new approach for Grover's algorithm that always correctly solves the problem of Grover's algorithm.

Another important problem in quantum computing is designing reliable and cost-effective quantum gates using reversible binary logic. In classical logic design, the stage of logic design can be …

Model Explanations For Gender And Ethnicity Bias Mitigation In Ai-Generated Narratives, Martha Otisi Dimgba

Dissertations and Theses

Large Language Models (LLMs) are increasingly utilized in diverse applications, ranging from professional content creation to decision-making systems. However, their outputs often amplify the biases present in their training data, perpetuating stereotypes and reinforcing societal inequities, particularly regarding gender and ethnicity. Such biases can cause tangible harm, especially for underrepresented groups, and require awareness and effective mitigation strategies.

This work explores gender and ethnicity representation in narratives created by generative AI describing 25 occupational fields defined by the U.S. Bureau of Labor Statistics. We examine three large language models (LLMs)--Llama 3.1 70B Instruct, Claude 3.5 Sonnet, and GPT 4.0 Turbo. …

Culturable Microbial Communities In Root Nodules Of Red Alder (Alnus Rubra Bong.) And Scotch Broom (Cytisus Scoparius L.): Patterns Of Diversity And Composition, Felisha (Fay) Rene Pooler

Dissertations and Theses

Endophytes are a hyper diverse group of bacterial or fungal organisms residing within plant tissues without causing visible symptoms of disease. While their overall diversity and ecological functions are not well-understood, some endophytes can provide a range of important benefits to their host such as enhanced growth and increased tolerance to environmental stress. Nitrogen-fixing bacteria residing within nodules--specialized structures on the roots of legumes and actinorhizal plants--play an integral role in the plant microbiome by facilitating nitrogen availability in nutrient-poor environments. Remarkably, the patterns of diversity including both bacterial and fungal endophytes in root nodules are virtually known, except in …

The Role Of Homocysteine Redox Chemistry In Biomolecular Mechanisms, Megha Gupta

Dissertations and Theses

Homocysteine at elevated levels is a well-known independent risk factor for cardiovascular disease. However, it is still unclear, after large scale clinical trials, involving tens of thousands of patients, whether homocysteine is a disease mediator or marker. The disconnect between the basic science showing the association of homocysteine with cardiovascular disease and the outcomes of clinical trials based on vitamin therapy for homocysteine lowering, highlights the need for insights into the molecular mechanisms linking homocysteine to cardiovascular disease and other pathologies. For example, elevated homocysteine levels have also been associated with risk for stroke, venous thromboembolism, Alzheimer's disease, neural tube …

Towards A Global Understanding Of Tree Mortality, Andres Holz, International Tree Mortality Network

Geography Faculty Publications and Presentations

Rates of tree mortality are increasing globally, with implications for forests and climate. Yet, how and why these trends vary globally remain unknown. Developing a comprehensive assessment of global tree mortality will require systematically integrating data from ground-based long-term forest monitoring with large-scale remote sensing. We surveyed the metadata from 466 865 forest monitoring plots across 89 countries and five continents using questionnaires and discuss the potential to use these to estimate tree mortality trends globally. Our survey shows that the area monitored has increased steadily since 1960, but we also identify many regions with limited ground-based information on tree …

Plural Water Narratives: An Environmental Justice Lens On A Systematic Review Of Q-Methodology Water Research, Melissa Haeffner, Alida Cantor, Janet Cowal, Andrea Bryant, Darius Mani Yaw, Kinna Je Palacios, Daniela Serna, Bryce Sprauer, Abigail Tran-Gruver

Environmental Science and Management Faculty Publications and Presentations

Environmental justice research has shown that people's experiences and perceptions of water differ because systematic inequalities shape the extent to which people access clean water and are exposed to water hazards. Q‐methodology is one technique that has been used to aggregate multifaceted subjective narratives and understand different perspectives on a topic. In this paper, we systematically review 77 case study articles applying Q‐methodology to water‐related topics, to inventory how people perceive their relationships with water. We create a classification system based on environmental justice theory to examine (1) distributive justice issues around alternative water sources and agricultural and urban water …

"Our Vision Is That Black Mothers And Birthing People, Fathers, And Partners Are Safe, Honored, And Respected Throughout Pregnancy And Parenthood": Black Birth Workers' Agenda For Black Maternal Health In Oregon, Sarah Marguerite Applin

University Honors Theses

Black women and Birthing People (BWBP) face disproportionate rates of mortality within the United States healthcare system. BWBP are three times more likely to suffer a pregnancy-related death than White women. Therefore, addressing and consulting with BWBP about the birthing experience that BWBP sustains when they are bearing children is imperative. The inclusion and application of this key knowledge and understanding should be emphasized and at the root of further development toward reproductive justice. This participatory story was led by Dr. Roberta Hunte. Interviews and focus groups with Black birth workers, birthing people, and public health professionals were conducted in …

Beyond The Shadow Of Large Cities: Small And Mid-Sized Cities As Hidden Epicenters Of Eviction, Evicted In Oregon, Alex Farrington, Colleen Carroll, Azad Amir-Ghassemi, Safia Goldsmith, Lisa K. Bates

Urban Studies and Planning Faculty Publications and Presentations

Most eviction research focuses on large cities, leaving us with limited knowledge of evictions in smaller cities. Our analysis of evictions in three small and mid-sized cities in Oregon reveals that these cities can also experience severe eviction crises. By collecting and hand-coding data from justice courts, we provide a comprehensive view of evictions in these cities–including the role different types of courts play–for the first time.

Publishing And The Literary Agent, Rachel Noorda

English Faculty Publications and Presentations

Literary agents are an under researched and comparatively recent feature of international book publishing. This chapter defines literary agents in comparison to other international book publishing intermediaries (like foreign rights agents and literary scouts) and maps the history and roles of the literary agent in Europe and Anglo-America from the nineteenth century to the present. Agents are pushed and pulled by various dichotomies in the industry: center vs periphery, culture vs commerce, local vs global. Over time, literary agents have evolved from brokers to author advocates and informal to professionalized, enabled to flourish and multiply through international copyright coordination and …

Uncovering Moral Injury At Work: The Development And Initial Validation Of The Moral Injury At Work Scale (Miws), Megan J. Snoeyink

Dissertations and Theses

Employees frequently encounter situations at work that present moral or ethical dilemmas. Consequently, they may engage in immoral actions, witness moral violations, or fail to intervene when their coworkers behave immorally. Repeated exposure to such moral challenges can lead to moral injury--the damage to one's moral code and self-image resulting from witnessing, failing to prevent, or participating in what is perceived as an immoral act. Despite the potential for moral injury in workplace contexts, research has yet to adequately explore or measure this phenomenon. This dissertation addresses this gap by developing and validating the Moral Injury at Work Scale (MIWS). …

Improving Public Health Data Collection Approaches Across Populations: Findings From A National Evaluation Of Fruit And Vegetable Incentives, Carmen Byker Shanks, Betty T. Izumi, Jenna Eastman, Teala W. Alvord, Amy L. Yaroch

OHSU-PSU School of Public Health Faculty Publications and Presentations

Objective: Public health approaches for addressing diet-related health in the United States (US) include nutrition incentive (NI) and produce prescription (PPR) projects. These projects, funded through the US Department of Agriculture Gus Schumacher Nutrition Incentive Program (GusNIP), aim to support intake of fruits and vegetables through healthy food incentives. Measuring GusNIP impact is vital to assessing the ability of incentives to improve public health nutrition outcomes across populations. Shared measures used across GusNIP projects assess fruit and vegetable intake, food security, demographics, among other variables, through a participant survey. This study explored challenges and opportunities to support evaluation across GusNIP. …

Understanding Young Adolescent Identity And Experiences Through Internal Dimensions: A Scoping Review, Dezeré J. Martin, Stacie K. Pettit, Sandra L. Stacki, Kristie W. Smith, Micki M. Caskey

Curriculum and Instruction Faculty Publications and Presentations

The purpose of this study was to explore multiple facets of young adolescent identity and related experiences through a scoping literature review. Based on Gardenswartz and Rowe’s Four Layers of Diversity Model, we specifically examined extant literature around five of the internal dimensions: gender, sexuality, race, ethnicity, and physical ability. Two overarching research questions guided this investigation: What is the range and nature of current findings on young adolescent identity and experience? What gaps exist in research on young adolescent identity and experiences? To address these research questions, our research group conducted a scoping literature review using predetermined search strings …

Becoming A Learner: An Autoethnography, Joshua Dickinson

Dissertations and Theses

It is well understood that attitudes toward language learning impact outcomes. This thesis uses autoethnography to explore the author's experiences learning German, in-class and independently, examining the interplay between motivation, attitudes, and the learning environment. I analyze personal journals and notes, employing graphic storytelling to illustrate their emotional journey. This paper draws upon existing literature on second language acquisition, particularly focusing on Dörnyei's L2 Motivational Self System and Ushioda's person-in-context approach. The study reveals how personal beliefs, self-doubt, and the limitations of traditional classroom settings impacted my motivation and ultimately, how reflection facilitated a renewed commitment to learning. In conclusion, …

Monitoring And Modeling Legacy Tree Response To Restoration Treatments In The Klamath Mountains, Oregon, Usa, Isaac Joseph Ball

Dissertations and Theses

Climate change and its disruption of historical drought and wildfire patterns pose a substantial threat to forest health in the western United States. This threat is compounded by past management practices like fire suppression. The largest, oldest, and most ecologically valuable trees are particularly vulnerable, making their conservation a key objective of climate-adaptive forest management. Restoration treatments such as mechanical thinning have been shown to enhance tree growth and drought resilience in dry conifer forests, but long-term monitoring is necessary to understand their sustained effects. This study used dendroecological tree-ring analysis to investigate the effects of thinning on the growth, …

Navigating The Neoliberal Assemblage: The Role Of A Nonprofit Organization Shaping Disaster Governance And Community Resilience, Andrew Michael Russo

Dissertations and Theses

This dissertation examines the evolving role of Nonprofits Active in Disasters ("NADs") in disaster governance through a case study of the Cascade Relief Team, a nonprofit organization responding to the 2020 Echo Mountain Complex Fire in Oregon. Utilizing governmentality and assemblage theory frameworks, the study investigates how CRT navigates the complex interplay between neoliberal rationalities, community needs, and disaster response practices.

The research reveals CRT's multifaceted role in shaping disaster knowledge, mediating between official frameworks and local realities, and influencing the formation of resilient subjectivities. While CRT's practices often align with neoliberal approaches to disaster management, emphasizing individual responsibility and …

Investigating Environmental Controls On Temperature Dynamics In An Urban Stream, Matthew Cullen Yates

Dissertations and Theses

Water temperature is a critical environmental variable influencing aquatic ecosystems. This study investigated the factors controlling stream temperature and thermal stratification in Rock Creek (RC) and Bethany Lake, an urbanized watershed featuring an in-line irrigation pond and buried wastewater infrastructure. Previous research suggested that subsurface water flow might drive temperature shifts in Rock Creek during summer periods when flow from Bethany Lake ceases. From 2023 to 2024, continuous temperature and stage monitoring, combined with statistical methods including principal component analysis and random forest regression, were used to evaluate seasonal temperature dynamics and their controlling factors. Results confirmed that seasonal reversals …

Shock Effects Including Maskelynite Formation In Three Shergottite Meteorites From Mars, George Ayeh Anim

Dissertations and Theses

Martian meteorites result from large impact events on the surface of Mars that cause intense shock metamorphism. This study examines the shock metamorphic features of three shergottite meteorites, Dho 019, NWA 12241, and NWA 15628, to better understand shock impact events. The research uses petrographic analysis, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and electron backscatter diffraction (EBSD) to analyze the meteorites. A key focus of this research is the formation of maskelynite, a glass with plagioclase composition, whose formation mechanism has been the substance of debate among researchers. This study proposes that maskelynite forms through a transient intermediary …

Commensality In The Eateries Of Roman Pompeii, Amaya Yolanda Eckersley

Dissertations and Theses

Despite a nearly 300-year excavation history at Pompeii and many identified eating and drinking establishments, social behavior in these public or semi-public spaces has eluded significant research. Elite Roman literature is the traditional guideline for understanding Roman mealtimes and what they meant for social behavior. This literature, however, fails to accurately represent its sub-elite inhabitants. These sub-elites of Rome largely had their meals prepared outside of their homes. Pompeii is no exception and provides a massive boon for researchers willing to consider archaeological evidence. The buildings and evidence buried at Pompeii have ultimately shown a wide array of tabernae related …

A Critical Appraisal Of Poverty In The Context Of Nature-Based Communities: Selected Cases From The Philippines, Carla Edith Gonzales Jimena

Dissertations and Theses

The Philippines is considered one of the wealthiest countries in both Southeast Asia and the world when measured by biodiversity, mineral resources and natural resources. It is also one of the most highly mineralized countries on earth. However, despite these natural endowments, when measured by established economic and human development indices the Philippines remains poor. Using critical perspectives derived from Marxist tradition, William Chambliss' theory of law and its dialectical nature, Immanuel Wallerstein's World Systems Theory, and Fred Block's structural mechanism of the state, this study aimed to critically appraise the persistence of poverty in nature-based communities in the Philippines. …

Photocathodes From Aerobic Oxidation Of Tellurorhodamines, Amelia Jellison

Dissertations and Theses

Growing environmental concerns have facilitated an increased need for renewable energy. Solar energy is an excellent source of renewable energy, however current dye-sensitized solar cells are not efficient enough for commercial use. This thesis attempts to create a novel dye-sensitized cathode to increase the efficiency of dye-sensitized solar cells.

Dye-sensitized cathodes could lower the energy level on the cathode and thereby increase the overall efficiency of the solar cell, however until now it has not been attempted. A tellurorhodamine dye with a mesityl ring was chosen as the dye for its ability to aerobically oxidize in the presence of light. …

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

Dissertations and Theses

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

Displaced: An Ethnography Of Language And Identity Loss, Ariel Caroline Wilsey-Gopp

Dissertations and Theses

Through ethnography and personal narrative, I explore the language and identity loss of one person, my father, in order to understand the complex issues surrounding the effects of symbolic and structural violence on language and identity development. Through personal narrative, fieldwork, and interviews, I tell the story of one person, born in wartime during Nazi occupied Serbia, and follow the guiding questions: how does language get lost and what are the effects? Drawing on methodology set forth by empirical ethnographical work as well as more recent theory around epigenetics and trauma, my research synthesizes into focus three pillars of understanding …

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

Faculty Senate Monthly Packets

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

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

Psychology Faculty Publications and Presentations

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

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

Dissertations and Theses

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

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

Dissertations and Theses

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

Structural Earthquake Resiliency Of Rocking Core Systems With Floor Enabled Recentering, S. Taban Hajimirza

Dissertations and Theses

The growing need for structural earthquake resiliency, coupled with increasing demands for environmentally sustainable construction, has driven architects and engineers to emphasize the importance of earthquake-resistant mass timber multistory construction in regions prone to high seismic activity. With advancements in building technologies, cross-laminated timber (CLT) has emerged at the forefront of this movement by unlocking new potentials for urban development.

Motivated by the aforementioned demands, this PhD dissertation investigated lateral behavior and earthquake response of a novel lateral force-resisting structural system, known as Floor Recentering Rocking Core (FLR-ROCR). FLR-ROCR is a low-damage recentering mass-timber system that leverages restoring interactions between …

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

Dissertations and Theses

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

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

Dissertations and Theses

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

The purpose of the research is to understand …