Digital Commons Network^™

The Role Of Dna Topoisomerases In The Completion Of Dna Replication, Parisa Mokhtari

Dissertations and Theses

Accurate replication of the genome is essential to maintain cellular life. Completing DNA replication on the chromosome is central to this task and involves several enzymes, including RecBCD, RecG and SbcCD-ExoI, which process, join, and resolve the two convergent replication forks. This event is certain to generate a number of structural complexities involving supercoiling, tangles and knots as the two DNA replication forks converge which must be resolved to maintain the integrity of the genome. Structural knots and tangles generated during DNA replication, transcription and segregation are typically resolved by DNA topoisomerases. E. coli encodes four DNA topoisomerases--two type I …

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 …

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 …

Recontextualized Knowledge: Available Designs Of The Long-Form Youtube Video Essay, Michelle Lynn Arendt

Dissertations and Theses

Recontextualization - the intricate process of transferring meaning material from one social semiotic context to another - is the primary avenue through which science and social science are communicated to general audiences. The prevailing popularity of social media platforms such as YouTube has encouraged a digital turn in recontextualization research and practice, with considerable emphasis given to navigating web 2.0's unique participation structure. However, compared to professional organizations, which contribute the largest amount of recontextualized scientific or social scientific content to social media platforms, independent user-generated creators consistently produce more successful content. Of interest to this project is the YouTube …

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 …

A Faculty Workshop On Developing Students As Discipline-Situated Researchers, William Badke, Elizabeth Kreiter, Qinqin Zhang

Communications in Information Literacy

The reference librarians of Trinity Western University have a strong mission-driven commitment to teach information literacy, but there is a significant contrast between the amount of instruction they can provide and the demanding task of developing all students as skilled researchers. The growing teach-the-teacher model suggested an option to enlist faculty in providing a larger portion of information literacy instruction themselves. With strong support from academic administration, three librarians devised an initial faculty workshop as part of the university’s faculty professional development series, followed by four detailed weekly sessions. They based their activities on several factors: first, faculty members would …

Factors Impeding Mental Health Help-Seeking: A Literature Review, Justin Benner

University Honors Theses

This article is an examination and review of a selection of research articles published in relation to factors that serve as barriers that inhibit the mental health help seeking process. Untreated mental illness is a significant problem within the United States, with a reported more than half of adults within the United States not receiving treatment. In order to discover possible causes, 28 articles all released within the last 20 years, had a primary focus on barriers to mental health treatment seeking and featured adult populations within the United States were chosen. Findings where that stigma both serves as a …

The Role Of Christianity In Shaping Agrarian Policies And Environmental Interactions: A Comparative Analysis Of The Uk And The Netherlands, Grace N. Brimble

University Honors Theses

This thesis explores the enduring influence of Protestant Christianity on agrarian practices and environmental policies in the UK and the Netherlands, focusing on how historical religious values shape modern ecological and political landscapes. Despite increasing secularism, Protestant ethics--emphasising stewardship, diligence, and moral responsibility--persist culturally, influencing debates on sustainability, rural identity, and land use. Using case studies such as nitrogen policy protests in the Netherlands and post-Brexit agricultural transitions in the UK, this analysis highlights the symbolic role of Christian values in framing resistance and adaptation to contemporary challenges. The research combines discourse analysis and ethnographic perspectives to uncover the interplay …

The Inclusion Of Metacognition In Source Evaluation Instruction, Anthony Tardiff

Communications in Information Literacy

Though the ACRL Framework holds metacognition as crucial to exercising information literacy, its emphasis was reduced from prominence in early drafts to a single mention in the final document. At the same time, few of the frequently-taught sets of source evaluation criteria include a step for self-awareness. This raises the question: do librarians explicitly teach metacognitive concepts when they teach source evaluation? Online library guides about source evaluation from various colleges and universities in Washington state were analyzed, and librarians who taught source evaluation were surveyed to determine whether and to what extent metacognitive concepts were included as part of …

Mapping Out Information Literacy: A Textbook Review, Alyssa Russo

Communications in Information Literacy

This narrative review examines the thematic content and evolution of information literacy textbooks published between 2005 and 2022. Analyzing sixteen textbooks, it explores two themes: the research process and conceptual foundations of information literacy. The research process theme highlights the procedural aspects of conducting library research, delineating the steps from topic selection to presentation. The conceptual foundations of IL theme reveals a discrepancy in how textbooks address the broader conceptual underpinnings of information literacy, particularly the context of a rapidly changing information society. This review highlights the focus on practical skills and the relative lack of discussions on broader contexts …

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 …

Landscaping Impacts On Urban Soil Development, Fry Lundgren

University Honors Theses

Urban soils can play a key role in flood mitigation, water filtration, and supporting urban plant communities, however many are highly disturbed due to development and management practices. Although full recovery will take time (centuries), in the short term managing soils in ways that conserve organic matter inputs and promote nutrient cycling can support important soil functions and likely promote long term development. To understand how landscaping impact soil development on PSU campus, organic matter content, moisture content, and respiration rates were measured in soils from four area types with different long term weed management strategies (mulch- M; sustained plant …

Urban Japanese, Rural American: How Regionality Shaped Nisei Girlhood In Prewar America, Lauren Reiko Yanase

University Honors Theses

This thesis explores Nisei girls' racial and cultural identity formation in the American West before their forced removal to the World War II Japanese American mass incarceration camps. Japanese American history has long been dominated by male narratives, from labor histories of the 1880's first-generation Issei to the American patriotism of the 1930's second-generation Nisei. Japanese American women are generally considered through generational categories, promulgating a linear story of American progress. I argue that regionality is the main factor that shaped Nisei girls' self-identity, employing transcribed interviews with Nisei women born 1924-1929 as primary sources to write narrative histories differentiated …

Supporting Well-Being For The Home Visiting Workforce: Organizational Supports For Experiences Of Bias & Discrimination, Beth L. Green, Nicole M. Lauzus, Yumi Lee, Ron Joseph, Erin Gaines, Center For Improvement Of Child And Family Services

School of Social Work Faculty Publications and Presentations

This learning brief is the third in a series to share findings from a 2023 statewide survey of over 700 members of Oregon’s home visiting workforce. This study has provided a wealth of information about Oregon’s home visiting workforce and what could be done to improve and support worker well-being and retention, with a focus on the needs and experiences of home visitors of color and those who speak languages other than English.

Little research has examined the extent to which home visitors experience racism or discrimination on the job, how this may impact their professional and personal well-being, and …

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 …

Not Taking "No" For An Answer: The Interactional Organization Of Accepting And Refusing Childhood Vaccination In The Netherlands, Robert Prettner, Hedwig Te Molder, Jeffrey D. Robinson

Communication Faculty Publications and Presentations

Communication-intervention strategies for reducing vaccine hesitancy have been primarily based on survey and interview data. Virtually absent is an understanding of how vaccine hesitancy is organized interactionally in its primary, natural environment of medical consultations between parents and healthcare providers. This article uses conversation analysis to describe the sequence organization of the action of providers soliciting parents’ vaccination intent. We demonstrate that parents’ acceptance is “preferred” and sequence-closure relevant and that refusal is “dispreferred” and sequence-expansion relevant. Regarding vaccine refusal, we describe three different sequence-expansive actions, including soliciting an account, cautioning about the consequences of vaccine refusal, and “keeping the …

Evaluating The Multi-Valued Bartlett Processor, Daniel Robert Frister

Dissertations and Theses

A variety of approaches exist to track targets in the ocean using acoustic sensors, and the complex mix of source characteristics, environmental effects, and sensor array limitations can make the selection of an appropriate algorithm challenging. This thesis models in simulation a recently proposed signal processing method that is intended for use with a large rectangular sensor array to track the bearings of multiple sources. The method, referred to as the Multi-Valued Bartlett (MVB) processor, is an eigenvector beamformer that leverages the capabilities of large arrays to locate in bearing multiple sources simultaneously. The analysis of this thesis details the …

Ioc Consensus Statement: Interpersonal Violence And Safeguarding In Sport, Yetsa A. Tuakli-Wosornu, Kirsty Burrows, Kari Fasting, Mike Hartill, Ken Hodge, Keith Kaufman, Emma Kavanagh, Sandra L. Kirby, Jelena G. Macleod, Margo Mountjoy, Sylvie Parent, Minhyeok Tak, Tine Vertommen, Daniel J. A. Rhind

Psychology Faculty Publications and Presentations

Interpersonal violence (IV) in sport is challenging to define, prevent and remedy due to its subjectivity and complexity. The 2024 International Olympic Committee Consensus on Interpersonal Violence and Safeguarding aimed to synthesise evidence on IV and safeguarding in sport, introduce a new conceptual model of IV in sport and offer more accessible safeguarding guidance to all within the sports ecosystem by merging evidence with insights from Olympic athletes.

Mindfulness In Helping Professions: A Systematic Review Of Interventions And Research Gaps, Yi-Wen Su, Ye Luo

Counselor Education Faculty Publications and Presentations

Mindfulness interventions yield significant benefits such as stress reduction, increased empathy and compassion, and enhanced self-efficacy among counselors. These outcomes are particularly valuable for helping professionals. This systematic review examines mindfulness interventions within mental health professional development programs, evaluating their effectiveness, assessing outcomes, and analyzing the mindfulness measures used. A comprehensive search across three databases identified 19 articles meeting the inclusion criteria. Findings demonstrate that diverse formats of mindfulness interventions effectively enhance mindfulness levels, reduce stress, foster self-compassion, and improve mental health outcomes among counselors and trainees. The review underscores the necessity for future studies to report practical significance to …

¡Viva Puerto Rico! How Puerto Rico's Political And Economic Status Has Affected Its Vulnerability To Natural Hazards, Mystique Quintana

University Honors Theses

Using Hurricane Maria as a case study, this thesis examines Puerto Rico's vulnerability to natural disasters and explores the intersections between colonial history, political status, and socioeconomic inequalities. Undertaking the island's susceptibility to environmental crises based on centuries of colonial exploitation and dependence, along with restrictive U.S. policies. It is argued that policies like the Jones Act, Operation Bootstrap, and PROMESA perpetuate systemic neglect and undermine disaster preparedness. Due to these structural vulnerabilities, intensified by climate change, Puerto Rico is ill-equipped to recover from hurricanes. During Hurricane Maria, systemic governance failures, inadequate infrastructure, and insufficient federal aid exposed these deep-rooted …

Ev Charging At Multifamily Properties: Moving Beyond Barriers, Whit Jamieson, Anna Guida, Connor Herman

PSU Transportation Seminars

Transportation is the top contributor of greenhouse gas emissions in the US and light-duty vehicles are the #1 contributor to transportation emissions. Mass adoption of electric vehicles (EVs) is key in the fight toward a more sustainable future, but there are several factors that have delayed our transition to EVs.

EV charging at home is the most convenient and cost-effective charging option for EV drivers, but people living in multifamily housing face serious barriers to accessing home charging. During this session, we will explore why EV charging at multifamily housing is critical to mass adoption of EVs, barriers to charging …

Faint Glimmers: Redrawing The Housewife In Yamada Murasaki's Talk To My Back, Ceres Lovelace

Dissertations and Theses

Yamada Murasaki's seminal manga collection Talk to My Back, originally titled Shinkirari, tells a story of a woman's gradual journey toward agency within the constraints of a nuclear patriarchal family. Set within the everyday suburban life of Chiharu in 1980s Japan, Yamada uses subtle visual cues and restrained narrative techniques to illustrate her protagonist's struggles and quiet breakthroughs as she questions her identity and renegotiates her role as a housewife and mother.

By exploring the often-overlooked inner world of a housewife, Yamada scrutinizes traditional gender roles and reveals the burden and psychological toll of the emotional labor imposed on …

Inefficiencies In Water Supply And Perceptions Of Water Use In Peri-Urban And Rural Water Supply Systems: Case Study In Cali And Restrepo, Colombia, Diana Carolina Callejas Moncaleano, Saket Pande, Melissa Haeffner, Juan Pablo Rodríguez Sánchez, Luuk Rietveld

Environmental Science and Management Faculty Publications and Presentations

Introduction:

Water scarcity is a significant global challenge that frequently manifests as inadequate water supply for domestic purposes. However, domestic water insecurity can occur even in regions where water is naturally abundant. Despite Colombia’s plentiful surface water resources, rural and peri-urban communities often experience limited access to water. Existing water supply systems are frequently susceptible to poor maintenance, particularly in remote areas where much of the infrastructure remains outdated. Consequently, water is often lost through leaks or unintentional non-domestic use. Although a regulatory framework for water usage exists, it does not consistently translate into effective implementation.

Methodology:

Based on an …

Automated Verification Of Compiler Transformations, Yanzhao Wang

Dissertations and Theses

The ever-growing complexity of software and its target hardware makes it increasingly challenging to develop reliable compilers that preserve the semantics of source code during compilation. Traditional testing methods often lack sufficient test coverage and fail to identify subtle errors and undefined behaviors that can lead to compiler malfunctions. Furthermore, while formal compiler certification ensures semantic preservation through theorem proving, the inherent complexity of this process makes re-certification after each compiler revision substantially labor-intensive. This often significantly hinders the improvement of compilers.

This research aims to bridge the gap between increasing compiler complexity and the limited scalability of formal verification …

Faculty Senate Monthly Packet November 2024, Portland State University Faculty Senate

Faculty Senate Monthly Packets

The November 4, 2024 monthly packet includes the November agenda, appendices, and the Faculty Senate minutes and attachments from the meeting held November 4, 2024.

Editorial: Advances In Ecological Environment Changes In Coastal And Estuarine Waters In Response To Hydrodynamic Variability, Jiayi Pan, Yeqiang Shu, Zhe-Wen Zheng, Adam T. Devlin, Majid Nazeer, Andrew M. Fischer

Civil and Environmental Engineering Faculty Publications and Presentations

Over the past few decades, coastal and estuarine ecological environments have undergone significant and rapid transformations, driven by a range of factors, with the variability in hydrodynamic conditions being one of the most prominent (Elliott et al., 2019; Statham, 2012; Da et al., 2024). These dynamic forces influence water movement, sediment transport, and nutrient cycling, all of which are critical components affecting the health and stability of these ecosystems (van Vliet et al., 2023; Li et al., 2023). Consequently, understanding and interpreting hydrodynamic processes in coastal and estuarine waters are fundamental to unraveling the mechanisms behind ecological changes. This task …