Digital Commons Network^™

Faculty Mentors' Influence On Latino/A/X Stem Undergraduates' Stem Identity Development, Sandy Cerda-Lezama

Dissertations and Theses

Despite Latino/a/x college student attendance rising substantially over the past decades, their graduation rates do not match the increased admission rates. In addition, Latino/a/x students are considerably under-represented in STEM. However, research suggests that when these students are encouraged by social partners to have meaningful participation and given resources such as mentoring, this eases the barriers they experience. The current study utilized interviews with 11 Latino/a/x STEM undergraduates (aged 18-29) to understand how faculty mentors influence their STEM identity development. Students shared answers about how faculty promoted and inhibited their STEM identity development through conversations about their sense of competence, …

A Survey Of North American Electric Bicycle Owners, Cameron Steven Bennett

Dissertations and Theses

Rapid recent growth in the popularity of electric bicycles (e-bikes) has captured the attention of transportation researchers and policymakers seeking safe, sustainable, and active alternatives to conventional transportation modes. This thesis presents an investigation of e-bike owners in North America, complementing previous efforts in 2013 and 2017, and suggests implications for North American transportation planning.

An online survey was distributed to e-bike owners in the United States and Canada through email outreach, purchase incentive programs, and social media. The survey included questions on the respondents’ demographics, e-bikes, purchase decisions, travel behavior, perceptions of e-bikes, crash experience, maintenance needs, and receipt …

Beavers Beyond Boundaries: Perceptions Of Beaver-Related Restoration, Matthew V. Guziejka

Urban Ecosystem Research Consortium of Portland/Vancouver

This urban-focused research explores the multifaceted aspects of Beaver-Related Restoration (BRR) within the Tualatin River watershed, using a hydrosociological framework to understand the interconnectedness of water, ecological systems, and societal perceptions. Analyzing social and cultural dimensions associated with BRR, including stakeholder attitudes and potential conflicts, we conducted a voluntary survey at three Tualatin urban watershed study sites (Fanno Creek, Chicken Creek, Springville) during the summer of 2022.

Insights from residents' attitudes, perceived impacts, and preferred management strategies revealed a spectrum of opinions. While a majority acknowledged positive beaver impacts on water quality and habitat diversity, some expressed concerns about urban …

Edna Study Of The Kellogg-Mt. Scott Watershed, Amy D. Van Riessen

Urban Ecosystem Research Consortium of Portland/Vancouver

The Kellogg Creek Restoration and Community Enhancement Project is an exciting effort occurring in the heart of downtown Milwaukie. The project encompasses many elements, including:

• providing fish passage to 15 miles of habitat by removing the barrier at Kellogg Dam
• restoring 17 acres of high-quality habitat behind the dam
• providing public access and viewing points to encourage nature-based recreation and outdoor education
• increasing flood storage capacity to reduce flooding in lower Kellogg Creek
• modernizing the existing Oregon State Highway 99E bridge with an alternative that increases seismic resiliency and establishes a safe bike/pedestrian undercrossing
• providing interactive learning, scientific research and …

Vaux’S Swifts In Portland – 15 Years Of Monitoring An Iconic Bird, Candace Larson, Joe Liebezeit, Mary Coolidge

Urban Ecosystem Research Consortium of Portland/Vancouver

For 15 year, Portland Audubon has counted migrating Vaux’s Swifts at Chapman Elementary School and other sites in the Portland region as part of a community science effort to monitor fall chimney roost site use, safeguard key roosting sites from disturbances, and educate the public on the protection of this species of concern. Data are contributed annually to a larger West Coast wide tracking effort. Vaux’s Swift population numbers have been declining for several decades, likely due primarily to habitat loss. This species historically utilized large hollowed out old-growth tree snags to roost. Now, many depend on large chimneys as …

Supporting Private Property Owners In Tree Selection For Future Climate, Lea Wilson

Urban Ecosystem Research Consortium of Portland/Vancouver

Collectively, trees on private property provide broad watershed and human health benefits. The planting and maintenance of these trees, however, is reliant on the knowledge, resources, and stewardship ethics of a multitude of individual property owners. At the same time, climate change will both threaten these existing trees and necessitate a shift in the planting palette of future trees. We use a municipal tree planting program in Portland, OR (Treebate) as a case study for understanding how property owners value, select, and care for their trees. We found that while many property owners claim to have considered future climate in …

What Are Those Plants Doing Out There? Developing A Protocol To Assess Natural Area Function, Christa Von Behren

Urban Ecosystem Research Consortium of Portland/Vancouver

The Revegetation Program at the Bureau of Environmental Services aims to use a resilience-based adaptive management approach to steward natural areas, but we have lacked an adequate monitoring protocol to effectively implement this approach. We spent three years developing a functional assessment protocol to assess progress toward management goals and to infer performance of different ecological functions. Our goal was to create a protocol to evaluate progress toward multiple goals across habitat types, be quick enough to fit into busy schedules, and detailed enough to see change over time. We developed the functional assessment over three years from 2019 through …

Proceedings Of The 22nd Annual Urban Ecology & Conservation Symposium (2024), Lori Hennings

Urban Ecosystem Research Consortium of Portland/Vancouver

These proceedings document the agenda and abstracts for presentations and posters from the 22nd annual conference (2024) organized by the Urban Ecosystem Research Consortium of Portland/Vancouver (UERC). The UERC is a consortium of people from various universities and colleges, state and federal agencies, local governments, non-profit organizations and independent professionals interested in supporting urban ecosystem research and creating an information-sharing network of people that collect and use ecological data in the Portland/Vancouver area. The annual conference has an open call for abstracts. The UERC organizing committee selects the final oral and poster presentations, along with 2 invited keynote presentations

The Decline Of The Non-Hispanic White Population In The United States Of America, Richard R. Verdugo, David A. Swanson

Publications, Reports and Presentations

Objectives: The question of a declining non-Hispanic white (NHW) population has sparked debate in the United States. In examining this question, three bodies of research have emerged. One group reports that the decline is real, a second argues that it is an illusion, and the third provides evidence that the decline is concentrated within socio-economic segments of the NHW population. We use the third groups’ insight as the starting point for our research objective. Methods: In conjunction with data from Census Bureau sources, we use a series of Regression Models in this inquiry. Results: Our results show that the decline …

Teaching In A Kenyan Refugee Camp: A Critical Ethnography Of The Impact Of Teacher Preparation And Cultural Experience On Pedagogy, James Adiok Mayik

Dissertations and Theses

This research involved an investigation of the classroom experiences of formally unprepared refugee teachers in Kakuma Refugee camp. The purpose was to understand how refugee teachers with no preservice preparation in accordance with the standards of Kenya Teacher Service Commission (TSC) perceive and interact with pedagogical content knowledge (PCK) and cultural relevancy in their daily classroom experiences with students in a refugee camp-based school in Kenya. What informed this study was the view that refugee teachers bring with them their respective and diverse cultural knowledge--ontology, epistemology, and axiology. To gain better understanding of the experiences and perspectives of these educators, …

Understanding The Other: Mentor Ethnocultural Empathy And Relationship Quality And Duration In Youth Mentoring, Miriam Miranda-Diaz

Dissertations and Theses

Given the positive youth outcomes associated with participation in mentoring programs, there is growing interest to explore factors associated with mentoring relationship quality and duration in formal youth mentoring programs. In comparison to the majority of volunteer mentors, many young people participating in formal mentoring programs are of a racial-ethnic minority group and tend to be economically disadvantaged. This study investigates factors associated with these socio-cultural background differences between mentors and mentees. More specifically, this study investigates the association between a mentor's level of ethnocultural empathy, as reflected in empathic perspective-taking and acceptance of cultural differences, and the quality and …

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

Faculty Senate Monthly Packets

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

Machine Learning A Universal Harmonic Interatomic Potential For Predicting Phonons In Crystalline Solids, Huiju Lee, Yi Xia

Mechanical and Materials Engineering Faculty Publications and Presentations

Phonons, as quantized vibrational modes in crystalline materials, play a crucial role in determining a wide range of physical properties, such as thermal and electrical conductivity, making their study a cornerstone in materials science. In this study, we present a simple yet effective strategy for deep learning harmonic phonons in crystalline solids by leveraging existing phonon databases and state-of-the-art machine learning techniques. The key of our method lies in transforming existing phonon datasets, primarily represented in interatomic force constants, into a force-displacement representation suitable for training machine learning universal interatomic potentials. By applying our approach to one of the largest …

Queer Rural Youth Online: A Digital Ethnography, Joseph Robert Burns

Dissertations and Theses

This thesis is based on digital ethnographic fieldwork conducted in 2023 within Queer subcommunities on the social media sites Reddit and Twitter (now known as X) and data collected from interviews with Queer rural youth members of these communities. The data reveal that social media use directly influences the lives and actions of Queer rural youth, who use the space to build social connections, shape their personal identities, and seek advice pertaining to their in-person lives and decisions. By using these spaces, Queer rural youth build both bonding and bridging social capital, learn to subvert restrictions to their Internet access, …

Behavioral Management Of Respiratory/Phonatory Dysfunction For Dysarthria Associated With Neurodegenerative Disease: A Systematic Review, Sarah E. Perry, Michelle Troche, Jessica E. Huber, Jordanna Sevitz, James Curtis, Brianna Kiefer, Qiana Dennard, Deanna Britton, Multiple Additional Authors

Speech and Hearing Sciences Faculty Publications and Presentations

Purpose:

This systematic review represents an update to previous reviews of the literature addressing behavioral management of respiratory/phonatory dysfunction in individuals with dysarthria due to neurodegenerative disease.

Method:

Multiple electronic database searches and hand searches of prominent speech-language pathology journals were conducted in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses standards.

Results:

The search yielded 1,525 articles, from which 88 met inclusion criteria and were reviewed by two blinded co-investigators. A large range of therapeutic approaches have been added to the evidence base since the last review, including expiratory muscle strength training, singing, and computer- and device-driven …

From Body To World: Empathy And The Transformative Power Of Cinematic Imagination, Isabel Jaén Portillo

World Languages and Literatures Faculty Publications and Presentations

The transformative power of fiction has been acknowledged since antiquity (Jaén and Simon, 2012) and technologies such as cinematography have amplified it. This power resides in its capacity to move us, to change our emotional states. Moreover, the audiovisual and narrative strategies employed in film fictions allow us to experience emotions not only intensely but also safely. Our participatory responses are both elicited and modulated by the fictional “crafted” quality of the stories that we witness on the screen. What happens before our eyes does not pose a threat to us and does not need our intervention. Yet, …

Health From The Grassroots, Listening To Mob: University- Based Aboriginal Researchers Collaborate With Aboriginal Communities To Identify Health Priorities, Emma Walke, Kathleen P. Conte, David Edwards, Veronica Matthews

Homelessness Research & Action Collaborative Publications and Presentations

Background: There is opportunity for Universities to actively engage with Aboriginal communities to participate, conduct, and ideally lead, responsible research that attends to community priorities and issues. The Health from the Grassroots (Grassroots) project seeks to address an ongoing mismatch between university-defined priorities and community-defined priorities in rural [***]. Grassroots, led by Aboriginal staff of the [***], is a community engagement project aimed at engaging Aboriginal communities in conversations to inform research priorities. This paper describes the project vision, implementation, and lessons learned in the first years.

Approach: The Grassroots project was a true representation of collaborative research led by …

An Argument For The Integration Of Black Psychology In Undergraduate Psychology Program, Kelsey D. Glass

University Honors Theses

When we think about the theories behind the foundation of American psychology, many European names come to mind (i.e. Freud, Erickson, Brofenbrenner etc.). This Euro-American mode of psychology has been the standard in American Undergraduate education since the founding of a formal psychological education in the U.S. but what about names like Wade Nobles, Joseph White, Na-im Akbar, or Linda James Myers? These forerunners of Black Psychology are elusive in the foundational education of current American Undergraduate programs due to longstanding racial bias in the field. This bias reflects the systemic racism that American culture was founded on. This paper …

Where The Rubber Meets The Road: Emerging Environmental Impacts Of Tire Wear Particles And Their Chemical Cocktails, Paul M. Mayer, Kelly D. Moran, Susanne Brander, Stacey L. Harper, Manuel Garcia-Jaramillo, Elise F. Granek, Multiple Additional Authors

Environmental Science and Management Faculty Publications and Presentations

About 3 billion new tires are produced each year and about 800 million tires become waste annually. Global dependence upon tires produced from natural rubber and petroleum-based compounds represents a persistent and complex environmental problem with only partial and often-times, ineffective solutions. Tire emissions may be in the form of whole tires, tire particles, and chemical compounds, each of which is transported through various atmospheric, terrestrial, and aquatic routes in the natural and built environments. Production and use of tires generates multiple heavy metals, plastics, PAH's, and other compounds that can be toxic alone or as chemical cocktails. Used tires …

Localized Eigenvectors On Metric Graphs, Hannah Kravitz, Moysey Brio, J G, Caputo

Mathematics and Statistics Faculty Publications and Presentations

We analyze the eigenvectors of the generalized Laplacian for two metric graphs occurring in practical applications. In accordance with random network theory, localization of an eigenvector is rare and the network should be tuned to observe exactly localized eigenvectors. We derive the resonance conditions to obtain localized eigenvectors for various geometric configurations and their combinations to form more complicated resonant structures. These localized eigenvectors suggest new indicators based on the energy density; in contrast to standard criteria, ours provide the number of active edges. We also suggest practical ways to design resonating systems based on metric graphs. Finally, …

The Mosaic Programs Of The Basilica Of San Vitale And The Great Palace Of Constantinople: A Unique Reinvention Of Roman Pasts, Justine Spencer

University Honors Theses

The Church of San Vitale and the Great Palace of Constantinople offer remarkable examples of artistic productions in early Byzantine mosaics. Bridging from the same Roman past they reinvented a classical medium with their unique interpretations of earlier traditions. They exemplify the diversity of Byzantine artistic productions that could coexist within the same medium and era. The mosaics of the Great Palace were part of a secular governmental public space and found deep in the heart of the Eastern Roman Empire. The mosaics of the Church of San Vitale were made for the domain of the newly reconsecrated Orthodox church …

Analysis Of Countermeasures Against Remote And Local Power Side Channel Attacks Using Correlation Power Analysis, Aurelien Tchoupou Mozipo, John M. Acken

Electrical and Computer Engineering Faculty Publications and Presentations

Countermeasures and deterrents to power side-channel attacks targeting the alteration or scrambling of the power delivery network have been shown to be effective against local attacks where the malicious agent has physical access to the target system. However, remote attacks that capture the leaked information from within the IC power grid are shown herein to be nonetheless effective at uncovering the secret key in the presence of these countermeasures/deterrents. Theoretical studies and experimental analysis are carried out to define and quantify the impact of integrated voltage regulators, voltage noise injection, and integration of on-package decoupling capacitors for both remote and …

Technology Assessment For Cybersecurity Organizational Readiness: Case Of Airlines Sector And Electronic Payment, Sultan Ayed Alghamdi, Tugrul Daim, Saeed Mohammed Alzahrani

Engineering and Technology Management Faculty Publications and Presentations

Payment processing systems have advanced significantly in the airline business. Because e-payments are easy, they have captured the attention of many companies in the aviation industry and are quickly becoming the dominant means of payment. However, as technology advances, fraud grows at a comparable rate. Over the years, there has been a surge in payment fraud incidents in the airline sector, reducing the platform's trustworthiness. Despite attempts to eliminate epayment fraud, decision-makers lack the technical expertise required to use the finest fraud detection and prevention assessments. This research recognizes the lack of an established decision model as a hurdle and …

The Α-Crystallin Chaperones Undergo A Quasi-Ordered Co-Aggregation Process In Response To Saturating Client Interaction, Kirsten Lampi, Adam P. Miller, Susan E. O'Neill, Steve L. Reichow

Chemistry Faculty Publications and Presentations

Small heat shock proteins (sHSPs) are ATP-independent chaperones vital to cellular proteostasis, preventing protein aggregation events linked to various human diseases including cataract. The α-crystallins, αA-crystallin (αAc) and αB-crystallin (αBc), represent archetypal sHSPs that exhibit complex polydispersed oligomeric assemblies and rapid subunit exchange dynamics. Yet, our understanding of how this plasticity contributes to chaperone function remains poorly understood. This study investigates structural changes in αAc and αBc during client sequestration under varying degree of chaperone saturation. Using biochemical and biophysical analyses combined with single-particle electron microscopy (EM), we examined αAc and αBc in their apo-states and at various stages of …

Using Flipped Classroom Modules To Facilitate Higher Order Learning In Undergraduate Organic Chemistry, Lauren R. Holloway, Tabitha Miller, Bryce Da Camara, Paul M. Bogie, Briana L. Hickey, Jack Barbera, Angie L. Lopez, Multiple Additional Authors

Chemistry Faculty Publications and Presentations

In an ongoing effort to incorporate active learning and promote higher order learning outcomes in undergraduate organic chemistry, a hybrid (“flipped”) classroom structure has been used to facilitate a series of collaborative activities in the first two courses of the lower division organic chemistry sequence. An observational study of seven classes over a five-year period reveals there is a strong correlation between performance on the in-class activities and performance on the final exam across all classes; however, a significant number of students in these courses continue to struggle on both the in-class activities and final exam. The Activity Engagement Survey …

What Adolescents Say In Text Messages To Motivate Peer Networks To Access Health Care And Sexually Transmitted Infection Testing: Qualitative Thematic Analysis, Marguerita Lightfoot, Chadwick Campbell, Allysha C. Maragh-Bass, Joi Jackson-Morgan, Kelly Taylor

OHSU-PSU School of Public Health Faculty Publications and Presentations

Background:While rates of HIV and sexually transmitted infections (STIs) are extremely high among adolescents and young adults in the United States, rates of HIV and STI testing remain low. Given the ubiquity of mobile phones and the saliency of peers for youths, text messaging strategies may successfully promote HIV or STI testing among youths.

Objective:This study aimed to understand the types of messages youths believe were motivating and persuasive when asked to text friends to encourage them to seek HIV or STI testing services at a neighborhood clinic.

Methods:We implemented an adolescent peer-based text messaging intervention to encourage clinic attendance …

Mask2former With Improved Query For Semantic Segmentation In Remote-Sensing Images, Shichen Guo, Qi Wang, Shiming Xiang, Shuwen Wang, Xuezhi Wang

Computer Science Faculty Publications and Presentations

Semantic segmentation of remote sensing (RS) images is vital in various practical applications, including urban construction planning, natural disaster monitoring, and land resources investigation. However, RS images are captured by airplanes or satellites at high altitudes and long distances, resulting in ground objects of the same category being scattered in various corners of the image. Moreover, objects of different sizes appear simultaneously in RS images. For example, some objects occupy a large area in urban scenes, while others only have small regions. Technically, the above two universal situations pose significant challenges to the segmentation with a high quality for RS …

Editorial: Innovating A New Knowledge Base For Water Justice Studies: Hydrosocial, Sociohydrology, And Beyond, Melissa Haeffner, Jenia Mukherjee, Rebecca Lave, Jamie Linton, John Ndiritu, Raul Pacheco-Vega, Maria Ruska, Margreet Zwarteveen

Environmental Science and Management Faculty Publications and Presentations

Creating a new knowledge base that centers water justice (Zwarteveen and Boelens, 2014; Sultana, 2018; Wölfle-Hazard, 2022) in hydrosocial and sociohydrology studies involves a broader discussion about why justice matters, how to work toward this goal, and what the implications for research praxis are. The articles in this Research Topic approach different angles of water justice: as law (Fernández and Alba), a social movement (Dame et al.), practice (Pool et al.; Reeves and Bonney), cases of injustice (Caretta et al.), and theory (Krueger and Alba). From this Research Topic, we find that the interrelated concepts of naturecultures and care can …

Reconnecting A Stream Channel To Its Floodplain: Implications For Benthic Diatoms And Macroinvertebrate Trophic Structure, Patrick M. Edwards, Nicole C. Popp, Yangdong Pan, Christine L. Weilhoefer, Aspen Peterman, Lauren Mork, Matthew F. Johnson, Megan Colley, Multiple Additional Authors

Environmental Science and Management Faculty Publications and Presentations

Streams systems draining upland landscapes provide valuable ecosystem services, but they are vulnerable to incision and channelization caused by anthropogenic disturbance. Restoring a degraded stream to its pre-disturbance condition by reconnecting the channel to its historical floodplain aims to recover lost hydro-morphological processes and functions. Seeking evidence to indicate whether that aim is met in practice, we examined diatoms and the stream macroinvertebrate trophic structures in three reaches of Whychus Creek, Oregon, United States. Two reaches were reconnected to their pre-disturbance floodplains in 2012 and 2016. The third, control reach, was not restored and was selected to represent the degraded …

Uncovering The Critical Drivers Of Blockchain Sustainability In Higher Education Using A Deep Learning-Based Hybrid Sem-Ann Approach, Mohammed Alshamsi, Mostafa Al-Emran, Tugrul Daim, Mohammed A. Al-Sharafi, Gulin Idil Sonmezturk Bolatan, Khaled Shaalan

Engineering and Technology Management Faculty Publications and Presentations

The increasing popularity of Blockchain technology has led to its adoption in various sectors, including higher education. However, the sustainability of Blockchain in higher education is yet to be fully understood. Therefore, this research examines the determinants affecting Blockchain sustainability by developing a theoretical model that integrates the protection motivation theory (PMT) and expectation confirmation model (ECM). Based on 374 valid responses collected from university students, the proposed model is evaluated through a deep learning-based hybrid structural equation modeling (SEM) and artificial neural network (ANN) approach. The PLS-SEM results confirmed most of the hypotheses in the proposed model. The sensitivity …