Digital Commons Network^™

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 …

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 …

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 …

Synthesis Of Binary-Input Multi-Valued Output Optical Cascades For Reversible And Quantum Technologies, Ishani Agarwal, Miroslav Saraivanov, Marek Perkowski

Electrical and Computer Engineering Faculty Publications and Presentations

This paper extends the decomposition from the group theory based methods of Sasao and Saraivanov to design binary input multivalued output quantum cascades realized with optical NOT, SWAP, and Fredkin Gates. We present this method for 3, 5, and 7 valued outputs, but in general it can be used for odd prime valued outputs. The method can be extended to realize hybrid functions with different valued outputs. A class of local transformations is presented that can simplify the final cascade circuits. Using these simplifying transformations, we present an upper bound on the maximum number of gates in an arbitrary -variable …

Collaborative Robotics: Application Of Delphi Method, Jean-Marc Salotti, Ephraim Suhir

Mechanical and Materials Engineering Faculty Publications and Presentations

In the domain of collaborative robotics, it is often needed to make complex multiparametric choices or assessments that combine heterogeneous criteria, such as task performance, reliability, safety, and ergonomics. The Delphi method, a process of arriving at group consensus by providing experts with rounds of questionnaires, as well as the group response before each subsequent round, can be applied to solve this type of problems. The following Delphi method efforts are addressed in our analysis with application to finding appropriate criteria and their relative weights for the evaluation of the teleoperation task of a robotic platform: (1) Contribution of experts; …

Economic Foundations Of Contraceptive Transitions: Theories And A Review Of The Evidence, Mahesh Karra, Joshua Wilde

Urban Studies and Planning Faculty Publications and Presentations

We review the foundations of the economic development–contraception nexus, focusing on the pathways through which economic factors drive contraceptive adoption and change. We investigate the channels through which the relationship between economic development and contraceptive dynamics is mediated. Using global data, we document the correlations between economic development and contraception transitions over time and across geographies. We briefly examine the evidence of the role of fertility, both desired and realized, as a central pathway through which the relationship has been historically theorized and empirically verified. We also discuss a range of mechanisms through which economic development drives contraceptive use independently …

Effectiveness And Durability Of A Workplace Sedentary Behavior Intervention Based On The Total Worker Health® Approach, Brad Wipfli, Sara Wild, Ginger Hanson, Steven A. Shea, Kerri Winters-Stone, Wura Olawole, Renee Kozlowski, Saurabh S. Thosar

OHSU-PSU School of Public Health Faculty Publications and Presentations

We used the Total Worker Health^® approach to develop a multi-component workplace sedentary behavior intervention and tested intervention effectiveness in a cluster randomized trial. Participants (n = 198; 75% female) were recruited from three call-centers (two intervention and one usual practice control). All worksites received pedal stand active workstations. The usual practice site received no additional support, while the intervention group completed a six-month program of activities including computer-based training, behavioral self-monitoring, health and safety discussions, and pedaling competitions. Data collection included a survey, a physical health assessment, and accelerometer measures of sedentary behavior, physical activity, and sitting/standing …

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 …

How Does Herbicide Resistance Change Farmer’S Weed Management Decisions? Evidence From The Roundup Ready Experiment, Huichun Sun, Terrance Hurley, George B. Frisvold, Katherine Dentzman, David Ervin, Wesley Everman, Jeffrey Gunsolus, Jason Norsworthy, Micheal Owen

Environmental Science and Management Faculty Publications and Presentations

Adoption of diverse weed management practices is viewed as essential for slowing the spread of herbicide-resistant (HR) weeds. Yet, adoption of diverse tactics has remained low, while there has been explosive growth of resistant weeds. This study analyzes U.S.-farm-level data to identify factors affecting adoption of diverse weed management practices. This study uses directed acyclic graphs (DAGs) to consider how practice adoption is influenced by different causal pathways between farmer and farm characteristics and farmer awareness of and concern over HR weeds. This study then uses multiple regression analysis to estimate the direct and indirect pathways that influence practice adoption. …

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 …

Bike Buses: An Evaluation Of An Emerging Active Transportation To School Intervention, Evan Howington, Nathan Mcneil, John Macarthur

TREC Faculty and Staff Publications

Bike buses are a relatively new form of active transportation to school (ATS) that have primarily emerged in Europe and the United States. A form of coordinated, group bike riding along a defined route to school, bike buses are an outgrowth of Safe Routes to School interventions in North America that seek to reverse the declining rates of walking and biking to school among children. Our initial phase of research included a literature review of social and environmental factors affecting ATS in the contemporary North American context, and two convenience surveys of bike bus coordinators and parent participants. This initial …

¡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 …

Predicting Cloud-To-Ground Lightning In The Western United States From The Large-Scale Environment Using Explainable Neural Networks, Dmitri A. Kalashnikov, Frances V. Davenport, Zachary M. Labe, Paul C. Loikith, John T. Abatzoglou, Deepti Singh

Geography Faculty Publications and Presentations

Lightning is a major source of wildfire ignition in the western United States (WUS). We build and train convolutional neural networks (CNNs) to predict the occurrence of cloud-to-ground (CG) lightning across the WUS during June-September from the spatial patterns of seven large-scale meteorological variables from reanalysis (1995-2022). Individually trained CNN models at each 1° × 1° grid cell ( = 285 CNNs) show high skill at predicting CG lightning days across the WUS (median AUC = 0.8) and perform best in parts of the interior Southwest where summertime CG lightning is most common. Further, interannual correlation between observed and predicted …

“You Could Have Did Us Better Than This”: Reparative Housing Policies And The Struggle To Right Harms To Black Communities, Amie Thurber, Lisa K. Bates, Susan Halverson, Keisha Muia

School of Social Work Faculty Publications and Presentations

This paper contributes to the burgeoning literature related to reparative planning, with an emphasis on housing policy. After exploring the state of theorizing related to reparative planning, this paper describes its three central dimensions: public recognition, material redistribution, and social/spatial transformation. The authors use these dimensions to evaluate a housing policy designed to repair harms to Black residents in Portland, Oregon. This in-depth analysis draws on survey, interview, and focus group data to explore the degree to which residents’ experiences of the policy reflect these three dimensions. The paper concludes with implications for other municipalities considering reparative housing policies, namely …

Mean Field Control Of Droplet Dynamics With High-Order Finite-Element Computations, Guosheng Fu, Hangjie Ji, Will Pazner, Wuchen Li

Mathematics and Statistics Faculty Publications and Presentations

Liquid droplet dynamics are widely used in biological and engineering applications, which contain complex interfacial instabilities and pattern formation such as droplet merging, splitting, and transport. This paper studies a class of mean field control formulations for these droplet dynamics, which can be used to control and manipulate droplets in applications. We first formulate the droplet dynamics as gradient flows of free energies in modified optimal transport metrics with nonlinear mobilities. We then design an optimal control problem for these gradient flows. As an example, a lubrication equation for a thin volatile liquid film laden with an active suspension is …

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 …

Best Practices For The Naming Of Species, Luis A. Ruedas, Ryan W. Norris, Robert M. Timm

Biology Faculty Publications and Presentations

The process of describing a species has evolved considerably since the modern age of taxonomy was initiated with the publication of the 10th edition of Linnaeus’ Systema Naturæ in 1758. Nevertheless, the basic unit of the taxonomic framework remains the species group (species and subspecies). As a result, it is incumbent upon individuals undertaking species-group descriptions to strive for the highest standards, just as it is for reviewers and editors to hold authors to those same standards. The clear and mounting biodiversity crisis, the increasing proliferation of journals, the multiplication of journals publishing only in electronic format, the decline in …

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 …

Investigating The Learning Goals And Expectations Of Laboratory Coordinators, Graduate Teaching Assistants, And Students In General And Organic Chemistry Laboratory Courses, Elizabeth Blanche Vaughan, A. Montoya-Cowan, Christine Kim, Alexandra Stephens, Osie Hamilton, Jack Barbera

Chemistry Faculty Publications and Presentations

As chemistry education researchers and practitioners continue to investigate and improve undergraduate laboratory courses, it is necessary to consider the perspectives held by each of the stakeholders who are directly involved in these courses, including laboratory coordinators, graduate teaching assistants, and students. This study sought to qualitatively investigate the learning goals and expectations held by laboratory coordinators, graduate teaching assistants (GTAs), and students for general and organic chemistry laboratory courses at a single institution. This was completed through the collection and analysis of semistructured interview data from laboratory coordinators and GTAs and open-ended written responses from students. Results indicated that …

Polymorphism Control Of Polyethylene Terephthalate (Pet) Degradation Product Via Mechanochemistry Leads To Accelerated Microbial Degradation, Deepika Shingwekar, Nicholas Lutz, Delbert S. Botes, Elani J. Cabrera-Vega, Gonzalo Campillo-Alvarado, Jay L. Mellies, Jesus Daniel Loya

Chemistry Faculty Publications and Presentations

Here, we optimized a chemo-microbial degradation of polyethylene terephthalate. Developed a path to mechanochemically interconvert between BHET polymorphs and established that BHET polymorphism influences bacterial biodegradation rate.

Active Grid Turbulence Anomalies Through The Lens Of Physics Informed Neural Networks, Sofía Angriman, Sarah E. Smith, Patricio Clark Di Leoni, Pablo J. Cobelli, Pablo D. Mininni, Martín Obligado

Mechanical and Materials Engineering Faculty Publications and Presentations

Active grids operated with random protocols are a standard way to generate large Reynolds number turbulence in wind and water tunnels. But anomalies in the decay and third-order scaling of active-grid turbulence have been reported. We combine Laser Doppler Velocimetry and hot-wire anemometry measurements in a wind tunnel, with machine learning techniques and numerical simulations, to gain further understanding on the reasons behind these anomalies. Numerical simulations that incorporate the statistical anomalies observed in the experimental velocity field near the active grid can reproduce the experimental anomalies observed later in the decay. The results indicate that anomalies in experiments near …

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.

On The Improved Convergence Of Lifted Distributional Gauss Curvature From Regge Elements, Jay Gopalakrishnan, Michael Neunteufel, Joachim Schöberl, Max Wardetzky

Mathematics and Statistics Faculty Publications and Presentations

Although Regge finite element functions are not continuous, useful generalizations of nonlinear derivatives like the curvature, can be defined using them. This paper is devoted to studying the convergence of the finite element lifting of a generalized (distributional) Gauss curvature defined using a metric tensor approximation in the Regge finite element space. Specifically, we investigate the interplay between the polynomial degree of the curvature lifting by Lagrange elements and the degree of the metric tensor in the Regge finite element space. Previously, a superconvergence result, where convergence rate of one order higher than expected, was obtained when the approximate metric …

A 3d Memristor Architecture For In-Memory Computing Demonstrated With Sha3, Muayad J. Aljafar, Rasika Joshi, John M. Acken

Electrical and Computer Engineering Faculty Publications and Presentations

Security is a growing problem that needs hardware support. Memristors provide an alternative technology for hardware-supported security implementation. This paper presents a specific technique that utilizes the benefits of hybrid CMOS-memristors technology demonstrated with SHA3 over implementations that use only memristor technology. In the proposed technique, SHA3 is implemented in a set of perpendicular crossbar arrays structured to facilitate logic implementation and circular bit rotation (Rho operation), which is perhaps the most complex operation in SHA3 when carried out in memristor arrays. The Rho operation itself is implemented with CMOS multiplexers (MUXs). The proposed accelerator is standby power-free and circumvents …

A Finite-Horizon Approach To Active Level Set Estimation, Phillip Kearns, Bruno Jedynak, John Lipor

Mathematics and Statistics Faculty Publications and Presentations

We consider the problem of active learning for level set estimation (LSE), where the goal is to localize all regions where a function of interest lies above/below a given threshold as quickly as possible. We present a finitehorizon search procedure to perform LSE in one dimension while optimally balancing both the final estimation error and the distance traveled during active learning for a fixed number of samples. A tuning parameter is used to trade off between the estimation accuracy and distance traveled. We show that the resulting optimization problem can be solved in closed form and that the resulting policy …

Techniques For Modeling Ocean Soundscapes: Detailed Description For Wind Contributionsa, Martin Siderius, Michael A. Ainslie, John Gebbie, Alexandra Schäfke, N Ross Chapman, Bruce Martin, Kay L. Gemba

Electrical and Computer Engineering Faculty Publications and Presentations

Wind over the ocean creates breaking waves that generate air-filled bubbles, which radiate underwater sound. This wind-generated sound is a significant component of the ocean soundscape, and models are essential for understanding and predicting its impact. Models for predicting sound pressure level (SPL) from wind have been studied for many years. However, the terminology and definitions behind modeling approaches have not been unified, and ambiguity has led to differences in predicted SPL. The 2022 Ambient Sound Modeling Workshop was organized to compare ambient sound modeling approaches from different researchers. The main goal of the workshop was to quantify differences in …

Nfts At The Nexus Of Innovation And Sustainability: A Framework Aligning Nft Affordances With The Sustainable Development Goals, Kristi Yuthas

Business Faculty Publications and Presentations

The United Nations’ Sustainable Development Goals (SDGs) are goals associated with the most significant global issues, which include climate, health, security, and poverty. The goals are part of an agenda for making progress on environmental, social, and economic issues while ensuring peace and leaving no one behind. Meeting these goals requires effort and innovation on all fronts, including technology. Information and communication technologies have long contributed to these efforts, and more recently, blockchain for good projects have begun to bear fruit. Non-fungible tokens (NFTs), which are, in essence, certificates of ownership stored on a blockchain, can also contribute to sustainable …