Digital Commons Network^™

Analysis Of Turbulent Flow In Portland-Metro Urban Environment, Shaho Zana Meman

University Honors Theses

Air pollution is a significant issue faced by many major cities worldwide. The geometry and orientation of urban buildings greatly contribute to the dispersion of pollutants throughout cityscapes. To apply this information at a local level, this capstone project aims to analyze the velocity profiles of various areas in the Portland metro area using Computational Fluid Dynamics (CFD). First, we created models for three types of urban geometry: urban, suburban, and rural. Then, we ran simulations using the high-fidelity numerical simulation tool Envi-Met to analyze the turbulent flow field which is believed to have a close relation to air pollutant …

Early Detection Of Alcohol Related Dementia Across The Lifespan: An Integrative Literature Review For Primary Care Providers, Kaylee A. Chapman

University Honors Theses

Introduction: Alcohol related dementia (ARD) is a long-term, heterogeneous cognitive impairment that can develop in the course of excessive and prolonged use of alcohol. This integrative literature review evaluated the relevant research, preventative measures, and early detection of brain changes leading to memory impairment as a result of the chronic consumption of alcohol. Widespread prevention and detection of ARD can be achieved through the support of healthcare professiona ls in understanding, observing, and catching behavioral patterns ahead of time to properly direct treatment. The risk factors associated with an early diagnosis of dementia include, but are not limited to, abnormal …

Remediating History: A Review Of Restoration For Creeks Polluted From Historical Mining Sites, With The Red Boy Mine As A Primary Case Study, Kara Atiyeh

University Honors Theses

I conducted a literature review to examine the key aspects of restoring watersheds affected by pollution from historical mining. This review is then applied to a case study discussion of the Red Boy Mine and Clear Creek remediation project in Granite, Oregon. The goal of this discussion is to explore how an analysis of site conditions along with current literature on management practices can help guide these projects. Thousands of abandoned hard rock mines remain throughout the country, and many pose serious environmental health effects. Heavy metals like cadmium, nickel, and copper are brought to the surface from mining activity, …

A Stronger Square: Climate Resiliency For Pioneer Courthouse Square, Aaron Young, Anna Reusink, Hannah Johnston, Matthew Robinson, Meredith Herbst

Master of Urban and Regional Planning Workshop Projects

A Stronger Square aims to provide an inventory of climate resiliency initiatives for Portland’s Pioneer Courthouse Square that may be applied to mitigate the worst effects of climate change that the Portland metropolitan region is expected to face over the next 20 years. Given Pioneer Courthouse Square’s reliance on extensive programming and events throughout the year to fund its continued maintenance and upkeep in support of its mission to serve as “Portland’s Living Room”, it is important that operational and design alternatives begin to be considered in order to allow Pioneer Courthouse Square to continue to fulfill its mission well …

Office To Residential Conversions: A Housing Crisis Response, Lloyd District Portland Or., Mackenzie Aamodt, Carson Fehner, Samantha Gallagher, Kara Hamilton, Daisy Schonder, Etosha Terryll

Master of Urban and Regional Planning Workshop Projects

Given the prevalence of vacant commercial office space and the need for creative solutions from local developers and property owners, this report considers the feasibility of office-to-housing retrofits and comparable development options for increasing housing supply in the Lloyd District of Portland, Oregon. The purpose of this report is to analyze existing office buildings in Lloyd with a focus on financial feasibility, development opportunities and policy constraints for office to residential conversions. The opportunity to limit emissions by reusing existing structures and increasing energy efficiency, as well as the opportunity to increase seismic resilience was compared to other types of …

Pendarvis Farm Amphitheater: A Roadmap To Conservation Development, Maia Wiseman, Max Del Hierro, Wyatt Schaffner, Dawn Walter, Summer Cook, Miguel Gelin Ferreira

Master of Urban and Regional Planning Workshop Projects

This report focuses on the impacts and potential economic benefits of developing the Pendarvis Farm Amphitheater in Happy Valley, Oregon. Specifically, Cadence Planning Associates provides mitigation strategies for potential negative impacts to the surrounding areas; developed through community engagement and comparative case analysis. Key economic benefits, including increased regional activity and job creation, are projected alongside potential tax revenue. Mitigation strategies for impacts to the community developed to assuage community concerns, such as increased noise and decreased air quality, are proposed; including bike and pedestrian infrastructure improvements along key roads, a 10:00 pm end time for shows, and native tree …

Gathering Gardens: Identifying Land For Community Gardens In Portland, Aswatha Raghunathasami, Gail Chastain, Alan De Anda-Hall, Tyler Smith, Elias Peters

Master of Urban and Regional Planning Workshop Projects

The project’s ultimate goal was to create at least 5 new community garden sites in the city of Portland for people to grow their own culturally relevant foods. To focus on parts of the city with some of the highest equity and food security needs, Agate chose to narrow the project scope to neighborhood areas located east of SE 57th Ave. Through direct engagement with the community, the team developed a site inventory for new potential community garden locations, as well as recommendations for optimal garden management, inclusion, and longevity. The community gardens are expected to be established by APANO …

Exploring Professional Identities In Libraries: The Impact Of Credit-Bearing Courses Beyond Student Learning, Jane Hammons, Daniel S. Dotson, Hanna Primeau, Diana Ramey

Communications in Information Literacy

In this essay, we argue in support of library-led information literacy (IL) credit courses, emphasizing the impact that developing, teaching, and managing these courses can have on the professional identity of library faculty and staff. Existing research has indicated that librarians who teach credit courses may more strongly identify as teachers than those who teach only course-integrated sessions. We expand on this research by sharing the perspective of four individuals who are involved in the design, instruction, and coordination of credit-bearing IL courses, including two faculty librarians and two staff members. By providing these differing voices, we give a unique …

Moss Biomonitoring Of Lead Emissions From Hillsboro Airport, Daria Kolpakov

University Honors Theses

The objective of this experiment was to use biomonitoring as a method to determine lead concentration levels around Hillsboro Airport in Hillsboro, Oregon. Twenty-two samples were collected within a 2 km radius around Hillsboro Airport using a randomized sampling strategy. The concentrations of lead within the samples were determined using ICP-MS. The average lead concentration was (2.8 ± 5.0) mg/kg with a peak value of 21.6 mg/kg 0.57 km from Hillsboro Airport. As the average lead concentration was substantially skewed, Hillsboro Airport is likely to be the source of the lead increase.

Auditory Ace Mobile Application Capstone Review, Layla Smith

University Honors Theses

This paper describes the development process and outcomes of my 2023-2024 Capstone Project, Auditory Ace, a self-directed auditory training mobile application for individuals with cochlear implants. Recognizing the limitations of current market offerings, Dr. Timothy Anderson created a Capstone project proposal to develop an accessible auditory training mobile application. The Capstone team that took on this proposal consisted of Darya Haines, Dustin Huynh, Jordan Nguyen, Nihar Koppolu, Scott Thorkelson, Sienna Day, and myself, Layla Smith. This paper is structured to follow the Agile software development methodology, which we used to develop Auditory Ace, reviewing in detail every major choice we …

Advanced Acoustic Emission-Based Shm For Concrete Structures: Real-Time, High-Precision Imaging Of Crack Geometry And Damage Sourcetype Using Moment Tensor Inversion, Seyyedmaalek Momeni, Thomas Schumacher, Lindsay Linzer, Brice Lecampion

Civil and Environmental Engineering Faculty Publications and Presentations

In this paper, we introduce a novel automated and high-precision acoustic emission (AE) monitoring algorithm and the software SIMORGH, which is suitable for structural health monitoring (SHM) of civil structures. Initially developed for laboratory-scale hydraulic fracture monitoring, this core software has been effectively scaled up to meter-level applications and is compatible with heterogeneous media such as concrete. It is designed to work with various standard data formats and is handles both trigger-based and continuous data. We present initial results from implementing this software in the AE monitoring of two 4.88-meter-long concrete beams in a laboratory setting, comparing it with manually …

Combined Passive And Active Ultrasonic Stress Wave Monitoring Of Concrete Structures: An Overview Of Data Analysis Techniques And Their Applications And Limitations, Thomas Schumacher, Numa Bertola, Niklas Epple, Eugen Bruehwiler, Ernst Niederleithinger

Civil and Environmental Engineering Faculty Publications and Presentations

Combined passive ultrasonic (US) stress wave [better known as acoustic emission (AE)] and active US stress wave monitoring has been shown to provide a more holistic picture of ongoing fracture processes, damage progression, as well as slowly occurring aging and degradation mechanisms in concrete structures. Traditionally, different data analysis techniques have been used to analyze the data generated from these two monitoring techniques. For passive US stress wave monitoring, waveform amplitudes, hit rates, source localization, and b-value analysis, among others, have been used to detect and locate cracking. On the other hand, amplitude tracking, magnitude squared coherence (MSC), and coda …

Processes For Depositing Functionalized Nanoparticles Upon A Substrate, Erik T. Thostenson, Thomas Schumacher

Civil and Environmental Engineering Faculty Publications and Presentations

Processes for depositing functionalized nanoparticles upon a non-conductive substrate are disclosed herein. The processes may include the step of aerosolizing one or more particles into suspension within a gas, each of the one or more particles comprising functionalized nanoparticles having an electric charge. The processes may include the step the step of attracting the one or more particles onto a non-conductive substrate by a static electric charge opposite of the electric charge, wherein at least portions of the non-conductive substrate are having the static electric charge. The processes may include the step of depositing the functionalized nanoparticles onto the non-conductive …

The Value Of Support: Stem Intervention Programs Impact Student Persistence And Belonging., Erin E. Shortlidge, Mackenzie J. Gray, Suzanne Estes, Emma C. Goodwin

Biology Faculty Publications and Presentations

In response to unwaveringly high attrition from STEM pathways, STEM Intervention Programs (SIPs) support STEM students in effort to increase retention. Using mixed methods (survey and focus groups), we studied students at one university who were either supported or unsupported by SIPs to understand how students may differ in experiences believed to contribute to STEM persistence. We evaluated: sense of belonging, scientific self-efficacy, scientific community values, scientific identity, and STEM involvement. The enrollment status of students two and a half years postsurvey was also tracked. SIP students reported significantly higher science identity and sense of belonging and were more involved …

Exploring Cybertechnology Standards Through Bibliometrics: Case Of National Institute Of Standards And Technology, Tugrul Daim, Haydar Yalcin, Alain Mermoud, Valentin Mulder

Engineering and Technology Management Faculty Publications and Presentations

Cyber security is one of the topics that gain importance today. It is necessary to determine the basic components, basic dynamics, and main actors of the Cyber security issue, which is obvious that it will have an impact in many areas from social, social, economic, environmental, and political aspects, as a hot research topic. When the subject literature is examined, it has become a trend-forming research subject followed by institutions and organizations that produce R&D policy, starting from the level of governments. In this study, cybersecurity research is examined in the context of 5 basic cyber security functions specified in …

On The Transitional Wake Past A Streamwise Rotating Prolate Spheroid, Yuxin Wu, Jianzhi Yang, Helge I. Andersson, Jianyu Chen, Xiaowei Zhu

Mechanical and Materials Engineering Faculty Publications and Presentations

Direct numerical simulations are performed to study the behavior of the wake behind a 5:2 streamwise rotating prolate spheroid. The Reynolds number Re = 1000 under different rotational speeds over a large range of is considered, where Ω is the non-dimensional rotational speed based on the freestream velocity and the volume-equivalent diameter of the prolate spheroid. By successively increasing the rotational speed, seven distinct flow regimes were identified and explored: steady state, low-speed steady rotation state, axisymmetric state, high-speed steady rotation state, twofold rotational symmetrical state (TFRS), quasi-periodic vortex shedding state (QVS), and weakly chaotic state. Among these wake regimes, …

Streets Are For People! Livable Streets 2.0 And Five Decades Of The Conflict, Power And Promise Of Our Streets, Bruce Appleyard

PSU Transportation Seminars

Streets constitute the majority of our urban public spaces, yet we struggle everyday with how they should be designed and operated for travel, safety, and livability. In 1969, when Dr. Bruce Appleyard was 4 years old, he was hit by a car and nearly killed. Around that time his father, Donald Appleyard, started work on what would become Livable Streets, published in 1981 – a ground-breaking and seminal work, the product of more than a decade of rigorous research and thoughtful analysis that would uncover the ill effects of traffic and laying out the seminal arguments that streets are for …

Consequences Of Spatial Heterogeneity For Turbulent Wake Development, Ryan Scott

Dissertations and Theses

Spatial heterogeneity is an fundamental property of natural systems. In fluid dynamics subtle variations in fluid motion give rise to chaotic turbulent flows. When a fluid passes an object it retains an imprint of the object as a momentum deficit known as a wake. The resulting spatial structure of the wake is intrinsically linked to the object responsible for its creation. The coupling between geometric complexity in wake producing entities and turbulent wake evolution is considered in terms of spatial heterogeneity from individual wakes through turbulent canopy flows. First a novel Lacunarity-based method is developed for quantifying spatial heterogeneity in …

Investigation Of Piezocone Dissipation Test Interpretation In Clay Accounting For Vertical And Horizontal Porewater Pressure Dissipation With A Large Deformation Axisymmetric Penetration Model, Diane Moug, Andrew Huffman, Jason T. Dejong

Civil and Environmental Engineering Faculty Publications and Presentations

The piezocone (CPTu) dissipation test is used to characterize how the applied load from the penetrating cone is distributed between the soil and pore fluid during both penetrometer advancement and when penetration is paused. The coefficient of consolidation is often estimated from CPTu dissipation tests by interpreting the rate of excess porewater pressure (∆u) decay to static conditions during a pause in cone penetration. Most CPTu dissipation test interpretation methods are based on Terzaghi consolidation theory for ∆u dissipation at the cone shoulder (u₂ position) or cone face (u₁ position) and assume that radial ∆u dissipation dominates the …

Estimating Combined Effects Of Climate Change And Land Cover Change On Water Regulation Services Of Urban Wetlands In Valdivia, Chile, Jason Sauer, N. B. Grimm, Olga Barbosa, Elizabeth M. Cook, A. Mustafa, K. Kunkel, T. Mcphearson, A. Ballinger

Geography Faculty Publications and Presentations

The relationship between cities and wetland cover varies across the globe, with some cities converting wetlands to low‐ and high‐density urban cover and others preserving, conserving, or restoring wetlands, or constructing new ones. However, the scientific literature lacks studies relating changes in systemic flood risk in an urban stormwater management systems to changes in wetland cover. Furthermore, whether and how such relationships are affected by changing storm intensity under climate change is unknown. We present a case study on the effects of changes in urban wetland extent and storm intensity on flooding in an urban drainage system in Valdivia, Chile, …

Primary Care In The University Setting After Covid-19: A Multiple Case Study Of Student Health Services In Oregon, D. Chad Johnson

Dissertations and Theses

In 2020, the COVID-19 pandemic disrupted operations across the settings of primary care and higher education institutions (HEI). HEIs faced sudden decreases in revenue because of reduced enrollments and external pressures to rapidly adapt delivery methods to accommodate the inability to provide in-person classes. Similarly, most primary care settings experienced major reductions to in-person visits and fee-for-service revenues. Student health services (SHS) exist within both primary care and higher education settings and are a unique and poorly understood aspect of primary care. This research set out to explore this under-studied primary care setting by answering the question: "How has COVID-19 …

Experiences Of Community College Stem Students In Transferring And Adapting To A Four-Year Urban University, Mackenzie Jade Gray

Dissertations and Theses

Ensuring that the bachelor's degree pathway that begins at a community college is a robust option for science, technology, engineering, and mathematics (STEM) students will be key for addressing the calls to increase and diversify the future STEM workforce. Yet, students on this pathway currently face many structural barriers that can lead to attrition. In this work, we aim to understand the experiences of community college students as they transfer, adapt, and persist to graduation at an urban four-year university.

First, we used the Model for Analyzing Human Adaptation to Transition to explore the experiences of community college STEM students …

Nostalgia Marketing: An Integrative Framework, Yasamin Mehdian Rad

University Honors Theses

Nostalgia is a longstanding yet evolving concept in marketing, employed to evoke sentimental longing for the past. It is a complex emotion that can invoke warmth, happiness, sadness, and melancholy, and can be directed towards both personal memories and imaginative pasts--times and places that one has never experienced. This dual nature of nostalgia, categorized into personal and imaginative nostalgia, offers a powerful emotional appeal that marketers leverage to influence consumer behavior. Since the 1950s, the use of nostalgia in marketing has increased significantly, allowing brands to forge deep emotional connections with consumers. Despite its prevalent use, research on nostalgia's impact …

Rheological Properties And 3d Printing Behavior Of Pcl And Dmso2 Composites For Bio-Scaffold, Jae-Won Jang, Kyung-Eun Min, Cheolhee Kim, Chien Wern, Sung Yi

Mechanical and Materials Engineering Faculty Publications and Presentations

The significance of rheology in the context of bio three-dimensional (3D) printing lies in its impact on the printing behavior, which shapes material flow and the layer-by-layer stacking process. The objective of this study is to evaluate the rheological and printing behaviors of polycaprolactone (PCL) and dimethyl sulfone (DMSO₂) composites. The rheological properties were examined using a rotational rheometer, employing a frequency sweep test. Simultaneously, the printing behavior was investigated using a material extrusion 3D printer, encompassing varying printing temperatures and pressures. Across the temperature range of 120–140 °C, both PCL and PCL/DMSO₂ composites demonstrated liquid-like behavior, …

Artificial Neural Network-Based Modelling For Yield Strength Prediction Of Austenitic Stainless-Steel Welds, Sukil Park, Cheolhee Kim, Namhyun Kang

Mechanical and Materials Engineering Faculty Publications and Presentations

This study aimed to develop an artificial neural network (ANN) model for predicting the yield strength of a weld metal composed of austenitic stainless steel and compare its performance with that of conventional multiple regression and machine learning models. The input parameters included the chemical composition of the nine effective elements (C, Si, Mn, P, S, Ni, Cr, Mo, and Cu) and the heat input per unit length. The ANN model (comprising five nodes in one hidden layer), which was constructed and trained using 60 data points, yielded an R² value of 0.94 and a mean average percent error …

A Review Of The Toxicity Of Ingredients In E-Cigarettes, Including Those Ingredients Having The Fda's "Generally Recognized As Safe (Gras)" Regulatory Status For Use In Food., Nada O F Kassem, Robert M. Strongin, Andrea M. Stroup, Marielle C. Brinkman, Ahmad El-Hellani, Hanno C. Erythropel, Arash Etemadi, Vernat Exil, David H. Peyton, Multiple Additional Authors

Chemistry Faculty Publications and Presentations

Some firms and marketers of electronic cigarettes (e-cigarettes; a type of electronic nicotine delivery system (ENDS)) and refill liquids (e-liquids) have made claims about the safety of ingredients used in their products based on the term "GRAS or Generally Recognized As Safe" (GRAS). However, GRAS is a provision within the definition of a food additive under section 201(s) (21 U.S.C. 321(s)) of the U.S. Federal Food Drug and Cosmetic Act (FD&C Act). Food additives and GRAS substances are by the FD&C Act definition intended for use in food, thus safety is based on oral consumption; the term GRAS cannot serve …

Multi-Scale Variability Of Heavy Metals In A Snowpack In The Triple Divide Region Of The Western United States, Kelsey Hefner

University Honors Theses

Natural and anthropogenically sourced particulates are deposited from the atmosphere to landscapes via dry and wet deposition, making frozen winter snowpack a natural archive of atmospheric elemental composition. In the Western United States, wildfires are increasing in extent, duration, and severity. Severe fires remove forest canopy, impacting how atmospheric elements are dispersed and stored across snow-dominated watersheds. We evaluated concentrations of twelve elements in 397 winter snow core samples from a chronosequence of eight forests that burned with mixed severity from 2000 to 2018 in the Triple Divide region of Western Wyoming, the headwaters of the Columbia, Colorado, and Missouri …

Design And Test Of Asynchronous Systems Using The Link And Joint Model, Ebelechukwu Esimai

Dissertations and Theses

Asynchronous circuits offer numerous advantages, including low energy consumption and good composability and scalability. However, they remain meagerly adopted in the mainstream semiconductor industry. One reason is the limited number of design tools available to help designers navigate design complexity, particularly the myriad of asynchronous implementation styles.

This dissertation focuses on managing the myriad of asynchronous implementation styles by utilizing a circuit-neutral model, called Links and Joints, and embedding this Link-Joint approach into a design flow. Although years of past work have already laid the groundwork, the work in this dissertation identifies and addresses key missing pieces.

First, the …

Urgent Care Program Influences On An Integrated Health Care System, Craig H. Carter

Dissertations and Theses

The Veterans Health Administration (VHA) is the most extensive integrated health care delivery system in the world with over 20,000 physicians, 1,600 facilities, and more than 400,000 employees, caring for nine million veterans. The health care provided covers traditional outpatient and hospital-based services such as primary care, surgery, critical care, mental health, orthopedics, pharmacy, radiology, and physical therapy. Most VHA facilities offer additional medical and surgical specialties such as audiology, speech pathology, dermatology, dental, geriatrics, urology, oncology, podiatry, prosthetics, and vision care. Some of the more extensive VHA facilities offer advanced health care services, such as organ transplants and plastic …

A Deep Learning Framework For Blockage Mitigation In Mmwave Wireless, Ahmed Hazaa Almutairi

Dissertations and Theses

Millimeter-Wave (mmWave) communication is a key technology to enable next generation wireless systems. However, mmWave systems are highly susceptible to blockages, which can lead to a substantial decrease in signal strength at the receiver. Identifying blockages and mitigating them is thus a key challenge to achieve next generation wireless technology goals, such as enhanced mobile broadband (eMBB) and Ultra-Reliable and Low-Latency Communication (URLLC). This thesis proposes several deep learning (DL) frameworks for mmWave wireless blockage detection, mitigation, and duration prediction. First, we propose a DL framework to address the problem of identifying whether the mmWave wireless channel between two devices …