Digital Commons Network^™

Re-Indigenizing And Collaboratively Tending Urban Greenspaces, Divinity Nnenne Adewale

University Honors Theses

This work details the active process of land tending with the intention of re-Indigenization in the Pacific Northwest at several Portland sites; The Native American Student Community Center, PSU Oak Savanna, and the Ridgefield National Wildlife Refuge. Land tending is an intuitive process, one rooted in love and respect for life of all forms as well as becoming the perpetual student; land tending is not a skill to be mastered, only practiced. Unlike environmental management, tending cannot be done separate from the earth, in a classroom or otherwise. Connections are what tending is built on top of: the foundation; effort …

Participatory Longitudinal Qualitative Interview Study To Understand Autistic Gynaecological And Obstetric Health: The Autism From Menstruation To Menopause Study Protocol, Amy Brown, Kathryn Williams, Aimee Grant, Gemma L. Williams, Harriet Axbey, Abigail Wilkins, Ellen Firth, Hazel Lim, Helen Cave, Christina Nicolaidis, Multiple Additional Authors

School of Social Work Faculty Publications and Presentations

Autism is a lifelong minority neurotype present from birth. There is a dearth of credible evidence to suggest gender variation in Autism prevalence, despite historical under-diagnosis of women. Autistic people Assigned Female At Birth (AFAB) have worse physical and mental health compared with non-Autistic peers. To date, the reproductive health experiences of Autistic AFAB people have been under-investigated.Methods and analysis This study aims to co-develop a quality improvement intervention to improve the reproductive health of Autistic people. The study uses Community Partnered Participatory Research (an approach similar to Community-Based Participatory Research), largely through a Community Council that co-governs the study. …

Philanthropy Under Uncertainty: Muslim Religious Giving During The Covid-19 Pandemic, Osman Umarji, Rafeel Wasif, Shariq Siddiqui, Zeeshan Noor

Public Administration Faculty Publications and Presentations

This study investigates the demographic, religious, and psychological correlates of charitable giving during times of uncertainty. We employ structural equation modeling to understand the mechanisms that underlie faith-based philanthropy amongst Muslims. For this purpose, we analyzed Muslim American philanthropy during the month of Ramadan in 2020, a month traditionally associated with increased religiosity and philanthropy. Utilizing a sample of 1,722 Muslims in the United States and Canada, uncertainty intolerance was associated with financial anxiety (B = .26), which in turn was related to donating less money (B = -.06). Financial anxiety was also associated with subjective financial well-being (B =.-.22), …

Portraits Of Agency And Power: Exploring Andean Women In Guamán Poma's Chronicle, Ruby Sygar

University Honors Theses

This study explores the depictions of women in Felipe Guamán Poma de Ayala’s chronicle titled, El primer nueva crónica y buen gobierno. By concentrating on six distinct portraits within this manuscript, the findings intend to reveal the themes, differences, and symbolic meanings that characterize and differentiate these representations. The analysis delves into how these portrayals provide insights into the roles, status, and societal perceptions of women in Inca society during the colonial period. The situation of these depictions within the general context of gender and colonialism in Andean society aims to showcase how nobleman Guamán Poma’s work critiques and …

Efficient Visual Data Processing Approaches To Improve Resource Utilization, Yeganeh Jalalpour

Dissertations and Theses

With continuous advancements in technology, the volume of visual data being captured, distributed, and consumed across various applications is rapidly increasing. Enhancing the efficiency of visual data processing can improve resource consumption, making the storage, transmission, and use of this growing visual content more effective.

Image and video data constitute a significant share of internet traffic, making video compression a critical factor in enhancing overall data throughput by improving the video compression ratio. Capturing, transferring, and storing raw video data is challenging due to the substantial resources required for both storage and computation. Video compression, however, can significantly mitigate these …

A Mechanistic Study Of Silicon Nanocrystal Formation Via Solid State Synthesis, Katherine Mccarthy Weinfurter

Dissertations and Theses

Silicon nanocrystals (SiNCs) show promising physiochemical properties that could be used in industrial applications. The production of SiNCs through solid-state synthesis is ideal due to relatively low cost of equipment and chemical reagents, as well as the ability to scale-up production. A widely known and commonly used precursor previously used in solid-state synthesis for SiNCs, hydrogen silsesquioxane (HSiO_1.5), was discontinued in chemical manufacturing, which has led to researching alternative precursors (or starting materials). We have identified that there is a gap of knowledge related to producing these precursors, as well as the mechanistic understanding of the chemical reactions …

Schools Apart: Curricular Stratification Across School Socioeconomic Compositions And Implications For Educational Inequality In The Us, Daniel Mackin Freeman

Dissertations and Theses

Motivated by longstanding sociological theories and utilizing the most current, large, and nationally representative data, this dissertation aims to describe and add nuance to our understanding of how the curriculum US youth are exposed to is stratified by the socioeconomic composition of the schools they attend. All three empirical chapters suggest that school SES contributes to substantial differences in school structure, as evidenced by differences in course-taking patterns and how course-taking relates to academic achievement in high school and beyond. The first study suggests that the relationship between curricular intensity in secondary school and postsecondary achievement is variable depending on …

Working Paper No. 92, Karl Polanyi, Human Labor, And The Working Class, Niccolo Cellini

Working Papers in Economics

This inquiry seeks to establish that Karl Polanyi advanced ideas regarding human labor that we could judge as both seminal and enduring. Through examining his famous book, The Great Transformation, we could draw out three interconnected theses central to his critique of market-oriented economies. Firstly, we could emphasize that Polanyi judges labor as a fictitious commodity, emphasizing distinct aspects associable with labor’s emergence during the industrialization of England. In developing his ideas Polanyi draws upon the historical examples of the Speenhamland System and Frederick Engels' accounts of industrial labor that highlighted the destabilizing effects of embedding labor within …

The Devil In The Details: The Malleus Maleficarum And Its Relationship To Regional Witchcraft Beliefs In Metz And The Corresponding Trials, Morgan Gubser

University Honors Theses

This thesis will explore witch trials in Lorraine, France, in the mid- to late-1400s, with a strong focus on trials conducted in or in reference to the city of Metz. The sixteenth century saw the period of the "great witch trials", which is often studied by those publishing in Witchcraft Studies, but a renewed scholarly focus is now being placed on the time before these great trials. By understanding these smaller outbreaks of trials that occurred in Lorraine before the sixteenth century we might hope to understand why so many trials tore through the region a century later. This thesis …

Investigating Student Expectations, Buy-In, And Engagement In Lower Division Undergraduate Chemistry Labs, Elizabeth Blanche Vaughan

Dissertations and Theses

Laboratory courses constitute an integral aspect of chemistry education at the undergraduate level. Despite their prominence, a growing number of researchers have begun to think more critically about the value of laboratory learning experiences. As pedagogical decisions should be based on evidence, it is necessary for chemistry education researchers and practitioners to investigate the claim that teaching laboratories are a valuable part of science education. Therefore, the aim of this dissertation was to address one small section of this gap in the literature by obtaining a more robust understanding of students' expectations, buy-in, and engagement in lower division, undergraduate, chemistry …

Aquatic Plant Threats To The Columbia River, Jacob Rose, Gabriel Campbell

Center for Lakes and Reservoirs Publications and Presentations

These presentation slides provide an overview of some of the invasive aquatic plants that pose an emerging threat to Oregon waterways. It contains botanical notes and high-quality photographs of approximately nine different plant species. Additional slides emphasize the importance of early detection and rapid response, as well as existing resources for invasive species outreach. This presentation was given orally at the Oregon Department of Agriculture's Interagency Noxious Weed Symposium to an audience of natural resource practitioners.

Emerging Aquatic Plant Threats To Oregon Waterways, Jacob Rose, Gabriel Campbell

Center for Lakes and Reservoirs Publications and Presentations

This brief presentation provides an overview some of two invasive aquatic plants that pose a threat to the Columbia River, where it borders Oregon and Washington. Flowering rush (Butomus umbellatus) and fragrant waterlily (Nymphaea odorata) threaten aquatic habitats up and down the Columbia River. Staff from the Center for Lakes & Reservoirs promoted a quick, picture-based key for flowering rush and lookalikes. This presentation was given orally at the Oregon Department of Agriculture's Interagency Noxious Weed Symposium to an audience of natural resource practitioners.

Tag-Based Security In C: Writing And Specifying Flexible Protection, Sean Noble Anderson

Dissertations and Theses

The C language is ubiquitous and insecure. Tag-based security policies offer a flexible toolkit for runtime protection, including policies that mitigate the effects of undetected programming bugs and those that enforce security properties of the program logic. But tag policies can be difficult to define, and the protection that they offer can be difficult to specify and to prove.

This dissertation builds from an assembly-level specification of stack safety, encompassing the essential control-flow structure of C and other high level languages, to a C source-level policy definition framework called Tagged C. Tagged C includes a variant C semantics parameterized by …

Recovery Of Black Carbon Concentrations In Burned Forests In Wyoming, Usa, Monica Vanesa Zapata Villegas

Dissertations and Theses

Burned forests that remain standing following fire release light-absorbing particles (LAPs), including black carbon (BC), into winter snowpacks, reducing snow surface albedo and accelerating snowmelt timing for decades postfire. Although the role of LAPs in seasonal snow has been extensively studied, the spatiotemporal variability of LAPs' contributions to snowmelt relative to time-since-fire and burn severity remains unknown. This study aimed to quantify the spatiotemporal variability of forest fire effects on LAPs in snow and associated snow albedo in the Triple Divide region of western Wyoming, headwaters of the Colorado, Columbia, and Missouri rivers. Using geochemical analysis and radiative transfer modeling, …

Landslide Mapping, Characterization, And Hazard Assessment With 3d Slope Stability Modeling In White Bluffs, Washington State, Anna Tsitsivas

Dissertations and Theses

Slope failures shape the landscape by moving unstable material downslope and, in doing so, become a great hazard to all those in their path. Understanding the mechanisms that control landslide location, timing, size, type, and runout - and therefore hazards - requires a deep understanding of the local geology, stratigraphy, and groundwater conditions. Along White Bluffs, in south-central Washington, landslides of several failure styles have likely been triggered by an increased water table in recent decades, threatening both farmland behind the bluffs and habitat below. This study focuses on characterizing potential groundwater sources and determining controls on spatial and temporal …

It's Going To Be Okay: Experiences And Perceptions Of People Who Seek Reassurance At Work, Liana Bernard

Dissertations and Theses

This study examined the experiences and perceptions of people who seek reassurance at work using a mixed methods (focus groups and experimental) approach. Reassurance-seeking is an attempt to elicit supportive communication from another person to help one reduce experienced anxiety. First, using focus groups with 32 participants, this study found that people seeking reassurance at work develop complex cognitive structures to reduce the prospective negative impacts of reassurance-seeking behaviors, particularly for those with marginalized identities. Then, in a 3x2 between-person experimental design in which employee gender and reassurance-seeking were manipulated, participants read a transcript of an interaction between an employee …

Increased Thermal Stability And Retained Antibacterial Properties In A Sulbactam And Amantadine Salt: Towards Effective Antibacterial-Antiviral Combination Therapies, Josephine Bicknell, Ivan Bondarenko, Alice Colatrella, Elani J. Cabrera-Vega, Jesus Daniel Loya, Delbert S. Botes, Jay L. Mellies, Gonzalo Campillo-Alvarado

Chemistry Faculty Publications and Presentations

A clinically relevant multidrug solid comprising sulbactam (β-lactamase inhibitor) and amantadine (antiviral) displays enhanced thermal stability and sustained antibacterial activity compared to starting materials.

We describe the formation of a multidrug salt comprising sulbactam (SUL, β-lactamase inhibitor) and amantadine (AMNH, antiviral). Physicochemical investigation of the SUL·AMNH salt revealed enhanced thermal stability compared to pristine starting materials. In vitro studies found that salt formation in SUL·AMNH does not disrupt antibacterial activity against model organisms Escherichia coli and Staphylococcus epidermidis. To our knowledge, we show the first β-lactamase inhibitor-antiviral salt where both components have been approved by the U.S. Food and Drug …

When Help Hurts: Workplace Instrumental Support And Employee Emotional Exhaustion Within-Person, Jensine Paoletti-Hatcher, Anthony T. Misisco, Eden B. King

Psychology Faculty Publications and Presentations

The social support paradox describes mixed findings on the effects of social support on well-being. An application of the person-environment fit perspective can address the paradox by reasoning that similar quantities of social support needs and social support supplies should result in optimal well-being outcomes. We integrate a person-environment fit perspective with self-determination theory in an examination of the relationship between workplace instrumental support and emotional exhaustion through a two-week experience sampling method study. Fifty-nine participants responded to questions about desired quantities of work-related help from their colleagues (coworkers and supervisors) and their perceived quantities of work-related help after work …

Social Contributors To Differences In Math Course Attainment Among Adolescents With And Without Learning Disabilities And Adhd, Dara Shifrer, Angela Frederick, Daniel Mackin Freeman, Hannah Sean Ellefritz, Rachel Springer

Sociology Faculty Publications and Presentations

Completing advanced high school math coursework relates to better adulthood outcomes. Our understanding of why youth with learning disabilities (LDs) and/or ADHD have less access to high math course attainment is limited. Using data on around 20,000 adolescents from the High School Longitudinal Study of 2009, results indicate that, regardless of disability status, structural inequities in family social position are more salient for youth's math course attainment than formal disability programming, universal supports, or structural inequities in how students are sorted across schools. Among youth with the same disability status, youth from higher SES families, or whose parents have a …

Taking Up Space And Making Demands: Portland State University Students Construct The Free And Autonomous Refaat Alareer Memorial Library, Aaron Roussell, Anonymous

Sociology Faculty Publications and Presentations

Student campus protest has been a hallmark of US social movements for decades. Edited versions of these movements are lauded in university courses on historical social change. Yet a variety of commentators in traditional media, campus administration, and political administration display a calculated confusion when it comes to contemporary campus movements, particularly around Palestine. This article aims to clear up that confusion, outlining the protests and occupations that took place in spring 2024 on the campus of Portland State University and in its renamed Refaat Alareer Memorial Library, setting them in their national (and international) context, and outlining the violent …

The Microorganisms Associated With Doliolids In A Productive Coastal Upwelling System, Melissa Steinman, Moritz S. Schmid, Robert K. Cowen, Su Sponaugle, Kelly R. Sutherland, Anne W. Thompson

Biology Faculty Publications and Presentations

Doliolids have a unique ability to impact the marine microbial community through bloom events and filter feeding. Their predation on large eukaryotic microorganisms is established and evidence of predation on smaller prokaryotic microorganisms is beginning to emerge. We studied the association between microorganisms and wild-caught doliolids in the Northern California Current system. Doliolids were collected during bloom events identified at three different shelf locations with variable upwelling intensity. We discovered doliolids were associated with a range of prokaryotic microbial functional groups, which included free-living pelagic Archaea, SAR11, and picocyanobacteria. The results suggest the possibility that doliolids could feed on the …

Sustainability Assessment Of Photovoltaic Cells In Cross-Functional Applications, Achyuth Ravilla

Dissertations and Theses

Achieving the G7 countries' net-zero emissions target by 2050 requires integrating photovoltaic (PV) systems into diverse cross-functional applications that support sustainable energy transitions across multiple sectors. This dissertation explores the economic and environmental sustainability of three such applications: agrivoltaics, lower-dimensional materials in perovskite solar cells, and PV-electrochemical water-splitting technologies for hydrogen production. Employing life cycle assessment (LCA) and techno-economic analysis (TEA), we address the knowledge gap in comprehensive evaluations of PV-integrated solutions.

The first chapter assesses agrivoltaic systems (AVS), which combine PV systems with agriculture to mitigate land-use conflicts while enhancing food and energy production. Findings indicate that AVS designs, …

Propagation Modeling Of Terahertz Reflections And Reflector Design For Mimo Channel, Thanh Ngoc Dan Le

Dissertations and Theses

Wireless communication has transformed connectivity, enabling seamless access across devices without physical constraints. Terahertz (THz) frequencies, ranging from 100 GHz to 10 THz, promise high-bandwidth channels crucial for applications like IoT and virtual reality. However, deploying THz communication faces challenges due to significant propagation limitations such as high attenuation and environmental absorption. The motivation behind this research is to develop a comprehensive understanding of THz propagation dynamics and utilize reflective surfaces to create multipath environments for an improvement in the capacity performance of MIMO channels.

This research investigates the potential of Multi-Input Multi-Output (MIMO) channels at THz frequencies to overcome …

Applying Positive Unlabeled Learning Techniques And Using The Kullback-Leibler Divergence To Improve Geothermal Surveying Assessments, Martín Thomas Rodriguez

Dissertations and Theses

As we face the current climate crisis, the discovery of geothermal energy resources has the potential to greatly reduce our dependence on fossil fuels worldwide. However, the development of any new energy infrastructure is expensive and depends on the willingness of energy agencies and developers to make initial investments based on calculated risk measures. One such measure, called geothermal favorability, is the likelihood that a site has conditions favorable for geothermal systems containing recoverable energy potential. Its prediction from existing geophysical datasets proves to be a nontrivial task. The prediction of geothermal favorability can be framed as a binary classification …

Laundry Program Evaluation, Jacen Greene, Sandra Comstock, Marisa Zapata

Homelessness Research & Action Collaborative Publications and Presentations

Nearly 4,000 people were reported as experiencing unsheltered homelessness in Multnomah County in 2023 (Theriault, Roots & Okeke, 2023). Studies by the Homelessness Research and Action Collaborative (HRAC) at Portland State University and other researchers have identified an urgent need for free laundry services among people experiencing unsheltered homelessness in the Portland region. A lack of access to clean laundry is associated with negative impacts on mental and physical health, as well as environmental impacts from wet or dirty textiles that are discarded rather than being reused.

In an attempt to address these and other issues, the City of Portland …

Cognitive Apprenticeship Strategies For The Media Literacy Classroom, Nate Floyd, Jaclyn Spraetz

Communications in Information Literacy

Inspired by the apprenticeship model of teaching and learning, two instructors report on their efforts to place current events at the center of a semester-long media and information literacy course. They discuss strategies to harness curiosity about contemporary topics (e.g., misinformation, climate change, algorithms, right-to-repair, blockchain, artificial intelligence, etc.), and create engagement-driven course content. The paper provides concrete examples of activities and assignments used to situate learning in real-world contexts and build students' confidence in navigating information independently. This case study offers insights for other educators seeking to apply cognitive apprenticeship principles to media and information literacy instruction.

Building On Strengths: A Collaborative, Asset-Focused Approach To Teaching Critical Information Literacy Skills, Rebecca B. Penrose, Kristi J. Chavez

Communications in Information Literacy

This article showcases an instructor–librarian collaborative model for teaching critical information literacy (CIL) skills in a higher education course by incorporating interactive workshops into a sequence of required course assignments. Using an asset-focused design, this assignment sequence allows students to first demonstrate their existing research strategies and then evaluate those strategies during workshop activities, applying the CIL principles they are learning. In this way, the approach recognizes students’ existing strengths and builds upon them, while emphasizing self-reflection opportunities and an intentional research focus on diversity, equity, inclusion, and representation. Results from our one-year study are also highlighted. The suggested instructional …

Centering Relevance In Information Literacy Teaching And Learning, Anne Jumonville Graf

Communications in Information Literacy

The process of determining whether a source of information is relevant is multidimensional, dynamic, and subjective. This essay puts information science scholarship on relevance, including the process and nature of making relevance judgments, in conversation with models of teaching and learning information literacy. Teaching librarians are encouraged to recognize students’ relevance judgments as sites of reflection and instruction. This essay suggests a variety of ways librarians might do this, from re-thinking source evaluation methods to emphasizing the opportunities available at the source selection stage. The process of determining relevance is a practical site of reflective possibility and deserves greater attention …

Aars Online: A Collaborative Database On The Structure, Function, And Evolution Of The Aminoacyl-Trna Synthetases, Jordan Douglas, Haissi Cui, John J. Perona, Oscar Vargas-Rodriguez, Henna Tyynismaa, Claudia Alvarez Carreno, Jiqiang Ling, Lluis Ribas De Pouplana, Xiang-Lei Yang, Multiple Additional Authors

Chemistry Faculty Publications and Presentations

The aminoacyl-tRNA synthetases (aaRS) are a large group of enzymes that implement the genetic code in all known biological systems. They attach amino acids to their cognate tRNAs, moonlight in various translational and non-translational activities beyond aminoacylation, and are linked to many genetic disorders. The aaRS have a subtle ontology characterized by structural and functional idiosyncrasies that vary from organism to organism, and protein to protein. Across the tree of life, the 22 coded amino acids are handled by 16 evolutionary families of Class I aaRS and 21 families of Class II aaRS. We introduce AARS Online, an interactive Wikipedia-like …

Mathematics Education Reform Through Socio-Political Means: A Synthesis, Nadine Ferguson

University Honors Theses

Mathematics education urgently needs reform, as traditional approaches fail to meet the diverse needs of today's student populations. Conventional teaching methods, which often focus on rote memorization and procedural understanding, overlook mathematics being a human activity that is inherently interlinked with culture. This paper explores three key approaches to reforming mathematics education: differentiation, culturally responsive mathematics (CRM), and critical mathematics. Grounded in Rochelle Gutiérrez's definition of equity--which emphasizes nurturing students' mathematical identities and agency--this analysis evaluates how each approach addresses four critical goals: ensuring access for all students to complex mathematics, fostering student confidence, promoting collaboration, and making mathematics relevant …