Digital Commons Network^™

Investing In United States Farmland: A Capital Asset Pricing Model Analysis, Bryce Jaden Messner

Agribusiness and Applied Economics

This study examines the risk and returns to owning United States farmland. State, regional, and national farmland returns from 1998 to 2018 are analyzed via the capital asset pricing model. Results show that farmland may be an effective route of investment portfolio diversification due to its favorable returns and low correlation with other commonly held assets. This study’s findings are generally consistent with similar research conducted in the past.

Critical Participatory Action Research: A Feminist Project For Validity And Solidarity, Michelle Fine, María Elena Torre

Publications and Research

We present critical participatory action research as an enactment of feminist research praxis in psychology. We discuss the key elements of critical participatory action research through the story of a single national participatory project. The project was designed by and for LGBTQIA+ (lesbian, gay, bisexual, trans, queer, intersex, asexual, plus) and gender expansive youth; it was called What’s Your Issue? We provide details of the research project, the dreams, desires, experiences, and structural precarity of queer and trans youth. We write this paper hoping readers will appreciate the complexities of identities; attend to the relentless commitment to recognition and solidarities; …

History Of Housing Policy In The United States, Lauren Elizabeth Morrow Everett, Marta Petteni

Homelessness Research & Action Collaborative Publications and Presentations

Graduate student Lauren Everett created a brief history of housing policy in the United States from 1843 to the present. She looked at major events that helped shape our country’s understanding and policies around property. Events include everything from the donation land claim act, which entitled each white, male settler to 320 acres in the Oregon territory, to the rent control stabilization legislation in 2019.

Useful Waste, Rebecca Taylor

Homelessness Research & Action Collaborative Publications and Presentations

The Useful Waste Initiative is an alternative and more sustainable way of thinking about construction waste. It encourages material diversion and aims to reframe views on waste management during the design and construction process. It guides the process to repurpose and utilize an overlooked material resource- envelope construction mock-ups. It also provides the opportunity to contribute to and support efforts to address pressing social needs with local communities, including shelter for the homeless.

Ralph Pugay: Excursions: A Ksmoca Collaboration Between Ralph Pugay And Students From Dr. Martin Luther King Jr. School, Ralph Pugay

King School Museum of Contemporary Art

Ralph Pugay: Excursions: A KSMoCA collaboration between Ralph Pugay and students from Dr. Martin Luther King Jr. School

This book presents two projects by Ralph Pugay. First, Excursions (2017), an exhibition of solo and collaborative works presented at KSMoCA, and second, A Long Line of Non-Partial Jurors (2018), a public art project commissioned by the Regional Arts and Culture Council and created in collaboration with KSMoCA.

Inheritance: A Ksmoca Collaboration Between Samantha Wall And Students From Dr. Martin Luther King Jr. School, Samantha Wall

King School Museum of Contemporary Art

Inheritance: A KSMoCA collaboration between Samantha Wall and students from Dr. Martin Luther King Jr. School

Inheritance features artwork by Portland-based artist Samantha Wall. The exhibit includes artwork by Wall as a well artwork created in collaboration with Dr. MLK Jr. School students in Ms. Jones' (5th grade) class. The Dr. MLK Jr. School students participated in a workshop led by Wall to create the portraits of people they care for. This catalog was created as an accompaniment to the exhibition of that work at King School Museum of Contemporary Art (KSMoCA).

Neuromechanical Model Of Rat Hindlimb Walking With Two-Layer Cpgs, Kaiyu Deng, Nicholas Szczecinski, Dirk Arnold, Emanuel Andrada, Martin Fischer, Roger Quinn, Alexander J. Hunt

Mechanical and Materials Engineering Faculty Publications and Presentations

This work demonstrates a neuromechanical model of rat hindlimb locomotion undergoing nominal walking with perturbations. In the animal, two types of responses to perturbations are observed: resetting and non-resetting deletions. This suggests that the animal locomotor system contains a memory-like organization. To model this phenomenon, we built a synthetic nervous system that uses separate rhythm generator and pattern formation layers to activate antagonistic muscle pairs about each joint in the sagittal plane. Our model replicates the resetting and non-resetting deletions observed in the animal. In addition, in the intact (i.e., fully afferented) rat walking simulation, we observe slower recovery after …

Performance Of Plunge Depth Control Methods During Friction Stir Welding, Jinyoung Yoon, Cheolhee Kim, Sehun Rhee

Mechanical and Materials Engineering Faculty Publications and Presentations

Friction stir welding is a preferred solid state welding process for Al/Fe joints, and in friction stir lap welding, the plunge depth is the most critical parameter for joint strength. We compared three plunge depth control methods, namely conventional position control, offset position control, and deflection compensation control in the friction stir lap welding of 3 mm-thick Al 5083-O alloy over 1.2 mm-thick DP 590 steel. The desired plunge depth was 0.2 mm into the steel sheet. However, the pin did not reach the steel surface under conventional position control due to deflection of the vertical axis of the welding …

Monitored Indoor Environmental Quality Of A Mass Timber Office Building: A Case Study, Jason Stenson, Suzanne L. Ishaque, Aurélie Laguerre, Andrew Loia, Georgia Maccrone, Ignace Mugabo, Dale Northcutt, Mariapaola Riggio, Andre Barbosa, Elliott T. Gall, Kevin Van Den Wymelenberg

Mechanical and Materials Engineering Faculty Publications and Presentations

A broad range of building performance monitoring, sampling, and evaluation was conducted periodically after construction and spanning more than a year, for an occupied office building constructed using mass timber elements such as cross-laminated timber (CLT) floor and roof panels, as well as glue-laminated timber (GLT) beams and columns. This case study contributes research on monitoring indoor environmental quality in buildings, describing one of the few studies of an occupied mass timber building, and analyzing data in three areas that impact occupant experience: indoor air quality, bacterial community composition, and floor vibration. As a whole, the building was found to …

Accumulation Of Di-2-Ethylhexyl Phthalate From Polyvinyl Chloride Flooring Into Settled House Dust And The Effect On The Bacterial Community, Samantha Velazquez, Chenyang Bi, Jeff Kline, Susie Nunez, Richard Corsi, Ying Xu, Suzanne L. Ishaque

Mechanical and Materials Engineering Faculty Publications and Presentations

Di-2-ethylhexyl phthalate (DEHP) is a plasticizer used in consumer products and building materials, including polyvinyl chloride flooring material. DEHP adsorbs from material and leaches into soil, water, or dust and presents an exposure risk to building occupants by inhalation, ingestion, or absorption. A number of bacterial isolates are demonstrated to degrade DEHP in culture, but bacteria may be susceptible to it as well, thus this study examined the relation of DEHP to bacterial communities in dust. Polyvinyl chloride flooring was seeded with homogenized house dust and incubated for up to 14 days, and bacterial communities in dust were identified at …

Equity In Emergency Management, Sabina Roan, Jaye Cromwell

Metroscape

In the decade following Hurricane Katrina, advocates fighting for the rights of people with disabilities changed the field of emergency management. Their pressure on FEMA led to the establishment of legal and planning precedents to include the needs of the whole community in emergency management.(4) There is now a national, legal requirement to plan for people with disabilities and access and functional needs. Despite this important victory for people with disabilities, there have been no direct legal or policy actions that address the disproportionate response along racial and socio-economic lines.

The theory of social equity has its roots in social …

Geography In Laser-Light: Using Lidar To Map The Metroscape, Justin Sherrill

Metroscape

Forms part of the recurring series Periodic Atlas of the Metroscape.

This issue of the Periodic Atlas will look at the rising prominence and capabilities of lidar, and how local researchers are using the technology to change the way we see, measure, and manage our region.

Preserving Small Farms In Gales Creek, Oregon: An Interview With Gales Creek Residents, Nathan Williams

Metroscape

Nathan Williams conducts interviews with several residents of rural Gales Creek, Oregon, discussing the problems faced by small farmers and challenges for farmland preservation.

Riverside Parks, Institute Of Portland Metropolitan Studies

Metroscape

A brief overview of the development of riverfront parks in the Portland Metropolitan Area, including the new Waterfront Park in Vancouver, WA that opened in September 2018.

A Bayesian Nonparametric Multiple Testing Procedure For Comparing Several Treatments Against A Control, Luis Gutiérrez, Andrés Barrientos, Jorge González, Daniel Taylor-Rodríguez

Mathematics and Statistics Faculty Publications and Presentations

We propose a Bayesian nonparametric strategy to test for differences between a control group and several treatment regimes. Most of the existing tests for this type of comparison are based on the differences between location parameters. In contrast, our approach identifies differences across the entire distribution, avoids strong modeling assumptions over the distributions for each treatment, and accounts for multiple testing through the prior distribution on the space of hypotheses. The proposal is compared to other commonly used hypothesis testing procedures under simulated scenarios. Two real applications are also analyzed with the proposed methodology.

Stability Conditions For Coupled Oscillators In Linear Arrays, Pablo Enrique Baldivieso Blanco, J.J.P. Veerman

Mathematics and Statistics Faculty Publications and Presentations

In this paper, we give necessary conditions for stability of flocks in R. We focus on linear arrays with decentralized agents, where each agent interacts with only a few its neighbors. We obtain explicit expressions for necessary conditions for asymptotic stability in the case that the systems consists of a periodic arrangement of two or three different types of agents, i.e. configurations as follows: ...2-1-2-1 or ...3-2-1-3-2-1. Previous literature indicated that the (necessary) condition for stability in the case of a single agent (...1-1-1) held that the first moment of certain coefficients governing the interactions between agents has to be …

Counting And Coloring Sudoku Graphs, Kyle Oddson

Mathematics and Statistics Dissertations, Theses, and Final Project Papers

A sudoku puzzle is most commonly a 9 × 9 grid of 3 × 3 boxes wherein the puzzle player writes the numbers 1 - 9 with no repetition in any row, column, or box. We generalize the notion of the n² × n² sudoku grid for all n ∈ ℤ^≥2 and codify the empty sudoku board as a graph. In the main section of this paper we prove that sudoku boards and sudoku graphs exist for all such n; we prove the equivalence of [3]'s construction using unions and products of graphs to the definition of …

Washington County: Tobacco Retail License Impact Analysis, Peter Hulseman

Northwest Economic Research Center Publications and Reports

This report estimates the economic impact of introducing tobacco retail licensure in Washington County, in the context of ensuring compliance with Tobacco 21 (SB 754) by using license registration to create a database of tobacco retailers.

Supporting Clinical Practice Through Rehearsals, Lubna Javeed

Northwest Journal of Teacher Education

Rehearsing is a form of pedagogy in teacher education to prepare pre-service teachers with instructional practices before live enactments in a classroom. This qualitative study used grounded theory to explore how rehearsals impacted five elementary literacy courses in a university teacher education program. Data comprised of prolonged observations, video recordings of rehearsals, and surveys. The process of coding and re-coding resulted in findings that reflect rehearsing provided Teacher Candidates with confidence with lesson presentation, improved understanding of literacy content, and understand how to make in-the-moment instructional decisions.

Field Experiences In Literacy Teacher Preparation: A Snapshot Of Current Practices, Laurie A. Sharp, Rebekah Piper, Roberta D. Raymond

Northwest Journal of Teacher Education

This qualitative study used social constructivism as a theoretical lens to examine ways in which literacy teacher educators incorporate field experiences during literacy coursework. A cross-sectional survey was distributed among literacy teacher educators affiliated with teacher preparation programs located in a single Southern state. Responses related to field experiences were retrieved from 42 surveys and analyzed with two cycles of coding. Findings indicated that preservice teachers completed a range of field experiences prior to student teaching that involved observing literacy instruction and leading literacy instruction with individual students and small groups of students. Incongruences between reported field experiences and recommendations …

The Relationship Between A University-Based Mentorship Program And First-Year Teachers’ Performance, Alicia C. Stapp, Laura F. Prior, Catherine Harmon

Northwest Journal of Teacher Education

Teacher attrition affects both the stability and quality of schools. Nearly 24% of teachers leave after one year, 33% leave after three years, and 40-50% leave within their first five years (Geiger & Pivovarova, 2018). Effective mentorship programs can effectively assist teachers in overcoming the challenges that lead to resignation. This study implemented a teacher mentorship program where the mentor was a teacher educator who had worked with the mentees in their undergraduate program. Utilizing a qualitative approach, the study examined first-year teachers’ performance through monthly field observations, interviews, and self-reflections. Themes emerged that are critical to a first-year teacher’s …

The Experiential-Learning Track: Career Exploration, Student Interest, & Applied Classroom-Learning In Small Rural Junior-Senior High Schools, Michael Turnlund

Northwest Journal of Teacher Education

Budgetary constraints can limit academic programs and elective offerings in small rural high schools. It is difficult to staff schools with teachers who hold the required credentials to offer elective courses that match student interests and future career or post-secondary education goals. This article details a strategy used by one small school in Idaho to address the problem. The Experiential-Learning Track Program allows for “hands-on” opportunities tied to learning objectives, and targets career and post-secondary education goals of individual students. Outcomes of the project included an increase in student population numbers and more connections with the local community.

In The Name Of Merit: Racial Violence In The Academy, Reshmi Dutt-Ballerstadt

Faculty Publications

Racial violence in the academy is enacted upon faculty of color, particularly women, in multiple disciplines. This essay attempts to both expose and suggest that everyday systemic racism has become a pervasive and normalizing feature within disciplines that continue to privilege white and Eurocentric forms of knowledge-making while devaluing others. Furthermore, attempts to challenge such supremacies are immediately countered by calls and charges of incivility. This is an essay about the costs of unmasking norms of civility as it bears upon constructions of both whiteness and meritocracy.