Digital Commons Network^™

Residential Ders In Service-Oriented Load Participation: Enhancing Grid Flexibility, Zhongkai Zeng

Dissertations and Theses

Amidst concerns about power consumption during peak periods and potential grid instability, the role of Distributed Energy Resource (DER) aggregation comes into consideration. Smart electric water heaters with remote capabilities and energy storage offer load reduction capabilities that can help maintain grid stability and manage residential energy consumption. DERs address challenges posed by stochastic renewable energy generation and fossil fuel power plant emissions, playing a contributing role in load shifting and enhancing grid flexibility by participating in energy management programs.

However, high unenrollment rates in demand response programs, notably programs that use direct load control, persist due to customer dissatisfaction. …

Women And Water: An Art-Based Academic-Community Partnership, Martina Angela Caretta, Bethani Turley

Geography Faculty Publications and Presentations

Women constitute most volunteer water stewards in West Virginia. After having conducted participatory research on the motivations behind women’s engagement with water preservation and restoration work we carried out two participatory art-based activities. In this Practices and Curations, we reflect on these two art-based activities to facilitate networking between researchers and participants and to communicate to the wider public the role of women water stewards. Together with community partners we first organized an icebreaker for women to share a boundary object that signified their connection with water. These boundary objects were subsequently displayed in an art exhibit highlighting women’s connection …

Can Smart Supply Chain Bring Agility And Resilience For Enhanced Sustainable Business Performance?, Mahak Sharma, Rose Antony, Ashu Sharma, Tugrul Daim

Engineering and Technology Management Faculty Publications and Presentations

Purpose

Supply chains need to be made viable in this volatile and competitive market, which could be possible through digitalization. This study is an attempt to explore the role of Industry 4.0, smart supply chain, supply chain agility and supply chain resilience on sustainable business performance from the lens of natural resource-based view.

Design/methodology/approach

The study tests the proposed model using a covariance-based structural equation modelling and further investigates the ranking of each construct using the artificial neural networks approach in AMOS and SPSS respectively. A total of 234 respondents selected using purposive sampling aided in capturing the industry practices …

Forest Service Engineering, Lessons And Opportunities, Joe Totten

PSU Transportation Seminars

Working in the Forest Service Engineering has different challenges and benefits than other common organizations for Civil Engineers or Transportation Planners. This presentation should provide a perspective on how we utilize dynamic tensions to reach consensus, how we apply lessons learned across disciplines and agencies, and share opportunities for growth and learning.

Immigration Policy Evaluation For Technology Professionals Immigrants In The United States, Angel Contreras Cruz

Dissertations and Theses

The U.S. Immigration System is complex for technology professionals seeking to relocate to the United States for employment or education. The United States relies on its employment-based immigration to attract and select the best talent to fill the shortage of skilled jobs. Technology professionals, a stream of highly skilled immigrants, tend to contribute and be more beneficial to the U.S. economy, which is one of the principles of U.S. immigration policies. Although U.S. immigration policies are constantly updating, policymakers, experts, and scholars suggest that the United States needs significant immigration reform to solve current issues, such as improving technological capabilities …

H1-Conforming Finite Elements On Nonstandard Meshes, Samuel Edward Reynolds

Dissertations and Theses

We present a finite element method for linear elliptic partial differential equations on bounded planar domains that are meshed with cells that are permitted to be curvilinear and multiply connected. We employ Poisson spaces, as used in virtual element methods, consisting of globally continuous functions that locally satisfy a Poisson problem with polynomial data. This dissertation presents four peer-reviewed articles concerning both the theory and computation of using such spaces in the context of finite elements. In the first paper, we propose a Dirichlet-to-Neumann map for harmonic functions by way of computing the trace of a harmonic conjugate by numerically …

Exploring The Curriculum And Institutional Contexts Of Stem Future Faculty Programs, Amy Mae Forester

Dissertations and Theses

While there are a multitude of contributing factors, under-represented student success in STEM appears to be critically interdependent with teaching and learning practices that are responsive to diverse epistemologies and inclusive pedagogies. However, the professional literature has yet to identify a set of faculty development best practices that might guide the field. Furthermore, the institutional supports required to drive the success of STEM-oriented future faculty programs remain unknown. This inquiry proposal intended to address these concerns through a critical comparative qualitative study in seeking evidence-based practices and institutional elements of STEM faculty professional development programs that support diverse graduate and …

Influence Of Antibiotic Exposure Intensity On The Risk Of Clostridioides Difficile Infection, Michael J. Ray, Luke C. Strnad, Kendall J. Tucker, Jon P. Furuno, Eric T. Lofgren, Caitlin M. Mccracken, Hiro Park, Jeffrey S. Gerber, Jessina C. Mcgregor

OHSU-PSU School of Public Health Faculty Publications and Presentations

Antibiotics are a strong risk factor for Clostridioides difficile infection (CDI), and CDI incidence is often measured as an important outcome metric for antimicrobial stewardship interventions aiming to reduce antibiotic use. However, risk of CDI from antibiotics varies by agent and dependent on the intensity (i.e., spectrum and duration) of antibiotic therapy. Thus, the impact of stewardship interventions on CDI incidence is variable, and understanding this risk requires a more granular measure of intensity of therapy than traditionally used measures like days of therapy (DOT).

Mental-Somatic Multimorbidity In Trajectories Of Cognitive Function For Middle-Aged And Older Adults, Siting Chen, Corey L. Nagel, Ruotong Liu, Anda Botoseneanu, Heather G. Allore, Jason T. Newsom, Stephen Thielke, Jeffrey Kaye, Ana R. Quiñones

Psychology Faculty Publications and Presentations

Multimorbidity may confer higher risk for cognitive decline than any single constituent disease. This study aims to identify distinct trajectories of cognitive impairment probability among middle-aged and older adults, and to assess the effect of changes in mental-somatic multimorbidity on these distinct trajectories.

Covid-19 Vaccination Uptake, Infection Rates, And Seropositivity Among Youth Experiencing Homelessness In The United States., Diane M. Santa Maria, Nikhil Padhye, Luis Ostrosky-Zeichner, Carolyn Z. Grimes, Adeline Nyamathi, Marguerita Lightfoot, Yasmeen Quadri, Mary E. Paul, Jennifer Torres Jones

OHSU-PSU School of Public Health Faculty Publications and Presentations

People experiencing homelessness are at greater risk of exposure and poor health outcomes from COVID-19. Yet, little data exists on the prevalence and correlates of COVID-19 among homeless populations. To mitigate the spread and severity, uptake of the COVID-19 vaccine is needed. This can be challenging among youth experiencing homelessness who are more likely to be unvaccinated when compared to stably housed youth.

Accord: Constraint-Driven Mediation Of Multi-User Conflicts In Cloud Services, Abhiroop Tippavajjula, Primal Pappachan, Anna Squicciarini, Jose Such

Computer Science Faculty Publications and Presentations

When multiple users adopt collaborative cloud services like Google Drive to work on a shared resource, incorrect or missing permis- sions may cause conflicting or inconsistent access or use privileges. These issues (or conflicts) compromise resources confidentiality, integrity, or availability leading to a lack of trust in cloud services. An example conflict is when a user with editor permissions changes the permissions on a shared resource without consent from the orig- inal resource owner. In this demonstration, we introduce ACCORD, a web application built on top of Google Drive able to detect and resolve multi-user conflicts. ACCORD employs a simulator …

Fixing A Hole: A Retrospective Cohort Study Evaluating Hav, Hbv, Tetanus Screening, And Vaccination During Hospitalization In Persons Who Use Substances, Amber C. Streifel, Jose Eduardo Rivera Sarti, Monica K. Sikka, Michael Conte, Bradie Winders, Cara D. Varley

OHSU-PSU School of Public Health Faculty Publications and Presentations

Background:Rates of serious injection-related infections in persons who use drugs have increased. Resulting admissions are an opportunity for screening and vaccination of preventable infections such as hepatitis A virus (HAV), hepatitis B virus (HBV), and tetanus. Design and methods:We conducted a retrospective review of adults with documented substance use admitted for bacterial infection between July 2015 and March 2020. We evaluated HAV, HBV, and tetanus vaccination status at admission, along with screening for HAV and HBV infection and immunity. We identified the proportion of patients at risk for infection who received HAV, HBV, and tetanus vaccines during admission and patient-level …

Using A Digital Entertainment Tax To Strengthen Local Information Infrastructure In The United States: A Conceptual Exploration, Lee Shaker, Antoine Haywood

Communication Faculty Publications and Presentations

As traditional local media decline, how might state and local governments provide support for local information infrastructure? We offer a proposal for states (or communities) to tax digital entertainment and then leverage existing community media centers (CMCs) to facilitate the distribution of the proceeds to local media outlets. Compared to other public subsidy plans, this approach is viable nationwide without federal action and offers several advantages that could lead to more immediate and durable support for local information infrastructure. To contextualize our proposal, we model both the possible revenue generation and distribution of funding that would result from its implementation.

Fea Simulations For Thermal Distributions Of Large Scale 3dic Packages, Suxia Chen, Qiang Wu, Wayne Xun, Jiachen Zhang, Jianping Xun

Computer Science Faculty Publications and Presentations

As the market increases for Artificial Intelligence and High-Performance Computing applications, the geometry of 3-Dimensional Integrated Circuit packages becomes more complicated; therefore, predicting the thermal distributions of the structures becomes not only more important but also more challenging. The physics governing the thermal distribution is a 3-dimensional partial differential equation. In order to predict the thermal distributions, various approaches such as the layer modeling method have been invented. While practical, these approaches solve a simplified version of the differential equation placing an inherent limitation on their capabilities which may be improved upon. In this research we solve the actual differential …

Motion History Images: A New Method For Tracking Microswimmers In 3d, Max Riekeles, Hadi Albalkhi, Megan Marie Dubay, Jay Nadeau, Christian A. Lindensmith

Physics Faculty Publications and Presentations

Quantitative tracking of rapidly moving micron-scale objects remains an elusive challenge in microscopy due to low signal-to-noise. This paper describes a novel method for tracking micron-sized motile organisms in off-axis Digital Holographic Microscope (DHM) raw holograms and/or reconstructions. We begin by processing the microscopic images with the previously reported Holographic Examination for Life-like Motility (HELM) software, which provides a variety of tracking outputs including motion history images (MHIs). MHIs are stills of videos where the frame-to-frame changes are indicated with color time-coding. This exposes tracks of objects that are difficult to identify in individual frames at a low signal-to-noise ratio. …

Is This My Place? Contributing Factors To Community College Students' Longitudinal Sense Of Belonging And The Connection Of Sense Of Belonging To Student Success, Kelly Elizabeth Love

Dissertations and Theses

Community colleges serve a large percentage of historically under-represented populations including students of color, low-income, and first-generation students. Unfortunately, less than half of students who begin at a community college return the following Fall and only about one-fourth of students eventually graduate. Previous research indicates that students' sense of belonging may be a key factor in retention and completion rates. However, large-scale datasets have yet to comprehensively explore students' sense of belonging in the community college setting. To address that issue, the purpose of this quantitative exploratory study was to examine individual and institutional variables associated with a measure of …

Evaluation Of Us Immigration Policies For Technology Professionals, Angel Contreras Cruz

Student Research Symposium

The U.S. Immigration System is complex for technology professionals seeking to relocate to the United States for employment or education. The United States relies on its employment-based immigration to attract and select the best talent to fill the shortage of skilled jobs. Technology professionals, a stream of highly skilled immigrants, tend to contribute and be more beneficial to the U.S. economy, which is one of the principles of U.S. immigration policies. Although U.S. immigration policies are constantly updating, policymakers, experts, and scholars suggest that the United States needs significant immigration reform to solve current issues, such as improving technological capabilities …

Youtube Video Essays As Critical Remixed Scholarship, Michelle L. Arendt

Student Research Symposium

YouTube videos have contributed primary and supplementary instructional materials to traditional classrooms since the 2010s (Sylvia & Moody, 2022). These internet-native materials are more successful than their traditional counterparts due to their recontextualization which melds dissemination with the semiotic landscape of web 2.0 culture.

Preferential treatment towards long-form, research-based content has facilitated the development of the YouTube video essay format: a grassroots practice that unapologetically embeds identity, pop culture, and humor with rigorous scholarly praxis and remediation of major elements of academic discourse (Davis, 2022). Videos of this type regularly reach “audiences which may rival or dwarf the enrollment of …

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

Student Research Symposium

The study "Beavers Beyond Boundaries: Perceptions of Beaver-Related Restoration" conducted by Matt Guziejka and Heejun Chang from the WISE Lab, Department of Geography at Portland State University, delves into the social, cultural, and environmental dimensions of Beaver-Related Restoration (BRR) within the urban setting of the Tualatin River watershed. Utilizing a voluntary survey with 187 participants across three urban watershed sites, the research aimed to analyze community perceptions concerning beavers and their impact on the environment, particularly in relation to their proximity to watercourses. Findings indicate that proximity significantly affects attitudes towards beavers, with those living closer to watercourses demonstrating more …

Impact Of Testosterone Therapy On Voices In Trans-Masculine People: A Scoping Review, Samuel E. Hedine, Jeff Conn, Deanna Britton

Student Research Symposium

Treatment of trans people by speech-language pathologists (SLPs) dates back to at least the 1980s. However, the majority of early research on the voices of trans people focused on trans-women. More recently, the field of speech-language pathology has garnered more interest in the effects of testosterone therapy in trans-masculine individuals. The goal of this project is to review current research, and compile the known effects of testosterone therapy in the trans-masculine population on common acoustic indices of voice production, including fundamental frequency (pitch), decibels/sound pressure level (dB SPL; loudness) and cepstral peak prominence (voice quality). A scoping literature search was …

Manga In Bookstores, Claire L. Curry

Student Research Symposium

In recent years, manga has seen a surge in popularity. This research seeks to provide insights into the role of manga in U.S. bookstores and its implications for reader discovery. Through observations at bookstores in the Portland area, including Books with Pictures, Kinokuniya, Powell’s, and Barnes and Noble, it was examined how manga is presented to readers. Factors considered include manga’s physical placement in the store and surrounding sections as well as shelving methods and categorizations like genre labels, particularly for manhwa, manhua, and light novels. Display tables, end caps, and shelf talkers also demonstrate an unique way for bookstores …

Impact Of Mindfulness-Oriented Recovery Enhancement On Pain And Disability In Patients With Chronic Lumbosacral Radiculopathy: Results From An Rct, Danielle Zuzero

Student Research Symposium

Lumbosacral Radiculopathy (LR), also known as sciatica, is a common type of radiating neurologic pain in the lower extremities with an estimated lifetime prevalence as high as 43%. The goal of this randomized control trial was to determine the impact of virtually delivered Mindfulness-Oriented Recovery Enhancement (MORE) on patients with LR. Participants were randomized to MORE sessions or treatment-as-usual (TAU) for 8 consecutive weeks, pain intensity was collected daily via email. At baseline and follow-up visits, participants completed questionnaires of disability, quality of life, depression, mindful interpretation of pain, and train mindfulness. Patients undergoing MORE sessions had greater improvement in …

Impact Of Intersecting Vulnerabilities On Functional Outcome And Health-Related Quality Of Life After Traumatic Brain Injury: A Prospective Cohort Study, Rekesh Subedi, Tatiana Hoyos-Gomez, Luis Tinoco-Garcia, John Cervantes Cervantes

Student Research Symposium

Traumatic Brain Injury (TBI) is a critical public health issue that disproportionately affects select vulnerable populations, including race/ethnic minorities, low-income individuals, and those without health insurance. Despite high incidences of TBI and its considerable impact on morbidity and mortality, research is limited in addressing how the intersectionality of vulnerabilities contributes to outcomes post-TBI. This literature review aims to synthesize existing knowledge regarding Social determinants of health (SDH) on TBI outcomes, focusing on functional recovery and health-related quality of life (HRQOL). This study will use a prospective cohort research design where TBI patients at Oregon Health and Science University (OHSU) will …

Work And Psychological Recovery Experiences Of Asian American And Pacific Island Workers In Higher Education, Christine M. Beceril

Student Research Symposium

Individuals from Asian, Asian American, and Pacific Islander (AAPI) backgrounds constitute the largest and fastest-growing minority group in the U.S. job market - comprising 6.7% of the U.S. population and expected to reach 15% by 2065 (United States Census Bureau, 2022). Despite their rapid growth, there has been a scarcity of literature in industrial-organizational psychology, with limited research on how AAPI workers engage in psychological recovery after work. This is a critical, yet unexplored area as previous research on psychological recovery from work has been investigated with homogenous White samples. Additionally, AAPI workers play integral roles in the U.S. higher …

Analyzing Intensifying Storm Events Correlation To Landslide Frequency In Portland’S West Hills, Aurora Villa Juan

Student Research Symposium

As the Pacific Northwest climate changes, extreme weather, such as intensifying storms, and a shift in the type of precipitation experienced with warmer winters causing more precipitation to fall as rain instead of snow, may lead to an increased frequency of landslides. There have been several recent landslides in Portland, noticeable to the public, particularly in areas of high elevation such as Council Crest, which stands at 1,073 feet. Additionally, residents of neighboring homes have observed changes in the landscape, including those on private properties. To better safeguard both public and private property, comprehensive research and mitigation efforts are required. …

The Cost Of Healthy Eating, Diana Prychyna, Miriam R. Elman, Joy Kim, Karen F. Miller, Deonni P. Stolldorf, Sean P. Collins, Bory Kea

Student Research Symposium

Background

Annually in the US, 15-20% of 1,000,000 Emergency Department visits for acute Heart Failure (HF) result in discharge, and patients often experience adverse health outcomes. The study, Get With the Guidelines in Emergency Department Patients With Heart Failure, utilized ‘Self-Care Coaches’ who meet participants via telehealth calls to discuss self-care maintenance after discharge; and offer provisions of resources, including a cookbook.

During calls, we observed gaps in self-care for retired older adults, living alone, and receiving food stamps from the federal SNAP program, who expressed struggles with affording an HF-friendly diet.

Objective

To investigate if the target population in …

Evaluating Equitable Success In Literary Spaces: A Portland Book Festival Case Study, Tia-Theo I. Thompson

Student Research Symposium

In 2015, data expressing the lack of diversity in literary institutions was made publicly available, yet equitable change remains slow. How do literary institutions achieve and evaluate successes in equity? Do certain factors expedite this transition?

In a three year Diversity and Inclusion plan (2019-2022), the Portland nonprofit, Literary Arts, drastically altered their internal and external practices to accommodate/introduce BIPoC writers, presenters, and employees. The equitability of this plan is assessed at the Portland Book Festival (PBF), 2023. Data concerning the identities, placement, and publications of Writers and Presenters at PBF is analyzed within the context of the goals set …

The Longitudinal Relationship Between Socioeconomic Status, Child Separation Anxiety Symptoms, And School Achievement In 1st Grade, Filip-Bogdan Serban-Dragan

Student Research Symposium

This informative poster highlights a study examining the association between child separation anxiety disorder (SAD) and school achievement, considering socioeconomic status (SES) and perceived financial stress. Data came from the Early Growth and Development Study (EGDS). Data from the kindergarten (age 6) and 1^st grade (age 7) assessments in the adoptive families (N=360 adoptive triads) were analyzed.

By controlling for parent’s income, financial stress, child’s gender and by measuring children at two time points (6 and 7 years), our study aims to identify the specific contribution of separation anxiety on academic achievement, enhancing our understanding of this …

Exploring Attrition And Linguistic Shifts: The Impact Of Covid-19 And Anti-Asian Discrimination On The East And Southeast Asian Diaspora, Sam Mutschler-Aldine, Amy Wan-Ling Lin, Natalie Robison, Milntra Raksachat, Carolyn Quam

Student Research Symposium

This study investigates language and identity among speakers of East Asian and Southeast Asian languages in the United States, within the context of the COVID-19 pandemic and the concurrent rise in anti-Asian hate. We adopt a mixed-methods approach guided by three research questions exploring: (1) changes in language use since pandemic onset, (2) changes in perspectives on language identity since pandemic onset, and (3) effects of geopolitical climate, specifically the rise in anti-Asian hate, on language use and perspectives on language identity. Qualitative methodologies allowed us to capture a diverse range of language experiences. Many (but not all) participants indicated …

Why People Pee In Public: Is A Lack Of Public Restrooms Keeping Portland Too Weird?, Cece Austin

Student Research Symposium

Various factors, including gender, housing status, socioeconomic status, and disability, impact access to public restrooms in Portland, Oregon. A pilot program involving the implementation of public restrooms has caused a significant reduction in public defecation in San Francisco. This research demonstrates the efficacy of this existing working model, which could be similarly implemented in Portland with some adjustments. Portland has the Portland Loos, which are single-stall, outdoor public restrooms. Still, many are not open 24 hours. An analysis of publicly available Google reviews indicates consistent poor cleanliness and Portland Loos being locked at times when they are advertised to be …