Digital Commons Network^™

A Comparison Of Neighborhood-Scale Interventions To Alleviate Urban Heat In Doha, Qatar, Salim Ferwati, Cynthia Skelhorn, Vivek Shandas, Yasuyo Makido

Urban Studies and Planning Faculty Publications and Presentations

Recent evidence suggests that many densely populated areas of the world will be uninhabitable in the coming century due to the depletion of resources, climate change, and increasing urbanization. This poses serious questions regarding the actions that require immediate attention, and opportunities to stave off massive losses of infrastructure, populations, and financial investments. The present study utilizes microclimate modeling to examine the role of landscape features as they affect ambient temperatures in one of the fastest growing regions of the world: Doha, Qatar. By modeling three study sites around Doha—one highly urbanized, one newly urbanizing, and one coastal low-density urbanized—the …

Rescaling Air Quality Management: An Assessment Of Local Air Quality Authorities In The United States, Kelsea A. Schumacher, Vivek Shandas

Urban Studies and Planning Faculty Publications and Presentations

Institutional design for local air quality management is an underdeveloped area for research and practice. Although the United States has more than a century of organizational experience managing air quality at the Federal level, the recent years have seen a surge of interest in addressing municipal-scale solutions. Without information about the institutional designs, governance structures, and implications of localizing air quality management, practitioners may face challenges reducing population exposure to air pollutants. We offer a US national perspective on managing local air quality by assessing and surveying 117 local air quality authorities identified by the National Association of Clean Air …

Improved Drought Resilience Through Continuous Water Service Monitoring And Specialized Institutions—A Longitudinal Analysis Of Water Service Delivery Across Motorized Boreholes In Northern Kenya, Nick Turman-Bryant, Corey L. Nagel, Lauren Stover, Christian Muragijimana, Evan A. Thomas

Complex Systems Faculty Publications and Presentations

Increasing frequency and severity of drought is driving increased use of groundwater resources in arid regions of Northern Kenya, where approximately 2.5 million people depend on groundwater for personal use, livestock, and limited irrigation. As part of a broader effort to provide more sustainable water, sanitation, and hygiene services in the region, we have collected data related to site functionality and use for approximately 120 motorized boreholes across five counties. Using a multilevel model to account for geospatial and temporal clustering, we found that borehole sites, which counties had identified as strategic assets during drought, ran on average about 1.31 …

Pdxscholar Annual Report 2018, Karen Bjork, Sherry Buchanan, David Coate, Bertrand Robinson, Stacey Schlatter

Library Faculty and Staff Publications and Presentations

This report details the eighth year of operation for PDXScholar, Portland State University's institutional repository, as well as the growth of Portland State University Library's publishing services. The report covers the period between January 1, 2018 and December 31, 2018.

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.

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 …

Monitoring Annoyance And Stress Effects Of Wind Turbines On Nearby Residents: A Comparison Of U.S. And European Samples, Gundula Hübner, Johannes Pohl, Ben Hoen, Jeremy Firestone, Joseph Rand, Brian Elliott, Ryan Haac

Regional Research Institute for Human Services

As wind turbines and the number of wind projects scale throughout the world, a growing number of individuals might be affected by these structures. For some people, wind turbine sounds and their effects on the landscape can be annoying and could even prompt stress reactions. This comparative study analyzed a combined sample of survey respondents from the U.S., Germany and Switzerland. It utilized a newly developed assessment scale (ASScale) to reliably characterize these stress-impacted individuals living within populations near turbines. Findings indicate low prevalence of annoyance, stress symptoms and coping strategies. Noise annoyance stress (NASScale) was negatively correlated with the …

Attitudes Of U.S. Wind Turbine Neighbors: Analysis Of A Nationwide Survey, Ben Hoen, Jeremy Firestone, Joseph Rand, Debi Elliot, Gundula Hübner, Johannes Pohl, Ryan Wiser, Multiple Additional Authors

Regional Research Institute for Human Services

Experts predict continuing deployment of wind turbines in the United States, which will create more interactions between turbines and surrounding communities. Policymakers can benefit from analyses of existing wind projects that enable them to better understand likely effects on residents around proposed projects. Our analysis of a randomly drawn, representative national survey of 1705 existing U.S. wind project neighbors provides previously unavailable detail about factors influencing the attitudes of these neighbors toward their local wind projects. Overall, we find positive-leaning attitudes, which improve over time as individuals self-select into communities near existing wind projects. Hearing wind turbines leads to less-positive …

A Cost-Benefit Analysis Of Livelihood, Environmental And Health Benefits Of A Large Scale, Christina K. Barstow, Randall Bluffstone, Kyle Silon, Karl Linden, Evan Thomas

Economics Faculty Publications and Presentations

Public health interventions targeting contaminated drinking water and indoor air pollution may help to reduce two of the leading causes of death among children under 5 in Rwanda - diarrhea and pneumonia. These interventions also have the potential to provide economic benefits, including reduction in expenditures on fuelwood and time spent on fuelwood collection, environmental benefits through reductions in deforestation and greenhouse gas emissions, and additional economic benefits attributable to health impacts. We evaluate one such large scale intervention, the Tubeho Neza program in Western Rwanda using a cost-benefit analysis. This paper estimates monetized program benefits related to fuelwood savings, …

Lake Oswego School District Population And Enrollment Forecasts 2019-20 To 2028-29, Portland State University. Population Research Center, Charles Rynerson, Joshua Ollinger

School District Enrollment Forecast Reports

This report presents the results of a demographic study conducted by the Portland State University Population Research Center (PRC) for the Lake Oswego School District (LOSD). The study includes analyses of population, housing and enrollment trends affecting the District in recent years, and forecasts of district‐wide school enrollments for the 2019‐20 to 2028‐29 school years. Following are some of the highlights found in this report:

• Population and Housing Trends
• Housing and Enrollment
• Enrollment Trends
• Enrollment Forecasts

Tigard-Tualatin School District Enrollment Forecasts 2019-20 To 2028-29, Portland State University. Population Research Center, Charles Rynerson, Joshua Ollinger

School District Enrollment Forecast Reports

This report presents the results of a demographic study conducted by the Portland State University Population Research Center (PRC) for the Tigard‐Tualatin School District (TTSD). The study includes analyses of population, housing and enrollment trends affecting the District in recent years, estimates of the impacts of housing development on TTSD enrollment, and forecasts of district‐wide and individual school enrollments for the 2019‐20 to 2028‐29 school years.

Mechanics And Historical Evolution Of Sea Level Blowouts In New York Harbor, Praneeth Gurumurthy, Philip Orton, Stefan A. Talke, Nickitas Georgas, James F. Booth

Civil and Environmental Engineering Faculty Publications and Presentations

Wind-induced sea level blowouts, measured as negative storm surge or extreme low water (ELW), produce public safety hazards and impose economic costs (e.g., to shipping). In this paper, we use a regional hydrodynamic numerical model to test the effect of historical environmental change and the time scale, direction, and magnitude of wind forcing on negative and positive surge events in the New York Harbor (NYH). Environmental sensitivity experiments show that dredging of shipping channels is an important factor affecting blowouts while changing ice cover and removal of other roughness elements are unimportant in NYH. Continuously measured water level records since …

Bigger Tides, Less Flooding: Effects Of Dredging On Barotropic Dynamics In A Highly Modified Estuary, David K. Ralston, Stefan Talke, W. Rockwell Geyer, Hussein A. M. Al-Zubaidi, Christopher K. Sommerfield

Civil and Environmental Engineering Faculty Publications and Presentations

Since the late nineteenth century, channel depths have more than doubled in parts of New York Harbor and the tidal Hudson River, wetlands have been reclaimed and navigational channels widened, and river flow has been regulated. To quantify the effects of these modifications, observations and numerical simulations using historical and modern bathymetry are used to analyze changes in the barotropic dynamics. Model results and water level records for Albany (1868 to present) and New York Harbor (1844 to present) recovered from archives show that the tidal amplitude has more than doubled near the head of tides, whereas increases in the …

We Would If We Could: Examining Culturally Responsive Teaching Self-Efficacy In A Middle School Mathematics Methods Course, Jamaal R. Young, Jemimah L. Young, Brandon L. Fox, Earl R. Levingston Jr., Alana Tholen

Northwest Journal of Teacher Education

Despite mounting evidence of the pedagogical importance of culturally responsive teaching, many teachers do not implement culturally responsive practices in their classrooms. The purpose of this study was to investigate pre-service mathematics teachers’ culturally responsive teaching and outcome expectancy in order to inform teacher preparation in mathematics methods courses. Participants completed the Culturally Responsive Teaching Self-efficacy Scale (CRTSE) and the Culturally Response Teaching Outcome Expectancy (CRTOE) Scale. Results suggest that middle school mathematics teachers were only moderately efficacious in their ability to implement culturally responsive teaching practices, despite strong beliefs in the instructional utility of culturally responsive teaching practices.

The Impact Of Attending An Equity-Based Conference On One Teacher Educator: Five Pedagogical Changes Of Practice, Rebecca Smith

Northwest Journal of Teacher Education

This article is a reflective overview of five pedagogical practice changes that one teacher educator made after attending a multicultural education conference. The article integrates current research to highlight the educational benefits of innovative, equity-based instructional strategies. The pedagogical changes are explored through the theoretical lens of culturally relevant pedagogy (Ladson-Billings, 1995; Gay, 2010) and culturally sustaining pedagogy (Paris & Alim, 2017) and include: diversifying curriculum, engaging with community partners, collaborating with K-12 practitioners, innovative technology, and self-reflection.

Administrators' Insights Into The Preparation And Performance Of New Teachers, Sarah J. Kaka, Jennifer A. Tygret

Northwest Journal of Teacher Education

There are few studies that focus on the perceptions and experiences of school administrators toward new teachers; however, understanding of both are required for accreditation. Furthermore, the school administrators’ perceptions of the training, as well as teachers’ performance and impact on student learning during their first years of teaching is vital to determine how new teachers are performing in the classroom. This case study explored these perceptions and three main themes emerged: Indicators of New Teacher Effectiveness, Evidence of Impact on Student Learning, and Identified Areas for Growth. Insight for understanding ways to improve teacher preparation are included.

The Isotopic Composition Of Meteoric Water Along Altitudinal Transects In The Tian Shan Of Central Asia, John Bershaw, Alex R. Lechler

Geology Faculty Publications and Presentations

The Tian Shan in Central Asia are a unique mountain range in that they are in the world's most continental location. Seasonal precipitation in the northern Tian Shan is segregated into distinct elevation bands where high elevations receive precipitation primarily during summer and low elevations to the north receive precipitation primarily during the late winter and spring. In this study, we sampled stream water along multiple altitudinal transects to determine the effect unique seasonal patterns of precipitation have on the isotopic composition of surface water. Our results suggest that the northern Tian Shan exhibits an isotopic lapse rate for waters …

Reanalysis Of The Us Geological Survey Benchmark Glaciers: Long-Term Insight Into Climate Forcing Of Glacier Mass Balance, Shad O’Neel, Christopher Mcneil, Louis Sass, Caitlyn Florentine, Emily Baker, Andrew G. Fountain, Multiple Additional Authors

Geology Faculty Publications and Presentations

Mountain glaciers integrate climate processes to provide an unmatched signal of regional climate forcing. However, extracting the climate signal via intercomparison of regional glacier mass-balance records can be problematic when methods for extrapolating and calibrating direct glaciological measurements are mixed or inconsistent. To address this problem, we reanalyzed and compared long-term mass-balance records from the US Geological Survey Benchmark Glaciers. These five glaciers span maritime and continental climate regimes of the western United States and Alaska. Each glacier exhibits cumulative mass loss since the mid-20th century, with average rates ranging from −0.58 to −0.30 m w.e. a−1. We produced a …

Using Virtual Reality And Web Conferencing Technologies: Exploring Alternatives For Microteaching In A Rural Region, Raymond A. Dixon, Cassidy Hall, Farjahan Shawon

Northwest Journal of Teacher Education

Preservice teachers’ views of two types of technologies which provided realistic environments in which to practice microteaching are described: (1) TLE TeachLivE™ Lab, a virtual reality environment that employs avatars as students in a virtual classroom, and (2) web conferencing technology to synchronously teach students in remotely located classrooms. Preservice teachers opined that each technology offers a relatively realistic environment that allows them to interact with virtual and real students. Microteaching through these technologies increases their self-confidence and provided a safe, non-threatening environment for them to reflect on their practice. We concluded these emerging technologies can provide viable alternatives to …

Classification Of Aerosol Population Type And Cloud Condensation Nuclei Properties In A Coastal California Littoral Environment Using An Unsupervised Cluster Model, Samuel A. Atwood, Sonia M. Kreidenweis, Paul J. Demott, Markus D. Petters, Gavin Cornwell, Andrew C. Martin, Kathryn A. Moore

Geography Faculty Publications and Presentations

Aerosol particle and cloud condensation nuclei (CCN) measurements from a littoral location on the northern coast of California at Bodega Bay Marine Laboratory (BML) are presented for approximately six weeks of observations during the boreal winter–spring as part of the CalWater-2015 field campaign. The nature and variability of surface (marine boundary layer, MBL) aerosol populations were evaluated by classifying observations into periods of similar aerosol and meteorological characteristics using an unsupervised cluster model to derive distinct littoral aerosol population types and link them to source regions. Such classifications support efforts to understand the impact of changing aerosol properties on precipitation …

A Recent Systematic Increase In Vapor Pressure Deficit Over Tropical South America, Armineh Barkhordarian, Bahareh Saatchi, Ali Behrangi, Paul C. Loikith, Carlos R. Mechoso

Geography Faculty Publications and Presentations

We show a recent increasing trend in Vapor Pressure Deficit (VPD) over tropical South America in dry months with values well beyond the range of trends due to natural variability of the climate system defined in both the undisturbed Preindustrial climate and the climate over 850–1850 perturbed with natural external forcing. This trend is systematic in the southeast Amazon but driven by episodic droughts (2005, 2010, 2015) in the northwest, with the highest recoded VPD since 1979 for the 2015 drought. The univariant detection analysis shows that the observed increase in VPD cannot be explained by greenhouse-gas-induced (GHG) radiative warming …

Do Directionality And Network Size Affect Network Structure In Online Social Networks?, Nitin V. Mayande, Charles Weber

Engineering and Technology Management Faculty Publications and Presentations

A study of the online social networks of six Twitter conversations about six YouTube product categories reveals that directionality and network size affect the structure of online social networks. Our results indicate that large networks tend to be non-random, regardless of whether they are directional or not, suggesting that structural attributes of the online networks under study are a true reflection of network's features. Smaller non-directional networks also tend to be non-random, whereas smaller directional networks tend to be random in nature. However, very small networks tend to be random in nature, whether they are directional or not. Our results …

Photoemission Electron Microscopy To Characterize Slow Light In A Photonic Crystal Line Defect, Theodore Stedmark, Rolf Könenkamp

Physics Faculty Publications and Presentations

Using femtosecond nonlinear photoemission electron microscopy (PEEM) we provide a detailed characterization of slow light in a small-size asymmetric photonic crystal structure. We show that PEEM is capable of providing a unique description of the light propagation in such structures by direct imaging of the guided mode. This noninvasive characterization technique allows modal properties such as effective index, phase velocities, and group velocities to be determined. Combining experimental results with finite element method simulation calculations, we study slow light phenomena in a photonic crystal defect mode, and we produce a comprehensive picture of the mechanisms behind it. Our results illustrate …

Imaging Technologies And Strategies For Detection Of Extant Extraterrestrial Microorganisms, Jay Nadeau, Manuel Bedrossian, Chris Lindensmith

Physics Faculty Publications and Presentations

There is no reductionist definition of life, so the way organisms look, behave, and move is the most definitive way to identify extraterrestrial life. Life elsewhere in the Solar System is likely to be microbial, but no microscope capable of imaging prokaryotic life has ever flown on a lander mission to a habitable planet. Nonetheless, high-resolution microscopes have been developed that are appropriate for planetary exploration. Traditional light microscopy, interferometric microscopy, light-field microscopy, scanning probe microscopy, and electron microscopy are all possible techniques for the detection of extant micro-organisms on Mars and the moons of Jupiter and Saturn. This article …

Participatory Action Research And Co-Researching As A Tool For Situating Youth Knowledge At The Centre Of Research, Staci B. Martin, Jessica H. Burbach, Lulis Lares Benitez, Irisa Ramiz

School of Social Work Faculty Publications and Presentations

Too often youth from vulnerable communities see themselves talked about in academic research, but are rarely involved as co-researchers or co-authors of research. The purpose of this article is to share our reflections on engaging youth, their experiences and their perspectives on the multi-levels of impact of participatory action research methodologies, such as community-based action research or youth participatory action research. This article discusses more broadly how our participatory methodologies have impacted our co-researchers and ourselves. In it, we provide additional details about our past research projects, as well as theorizing those details in terms of how critical theory serves …

Joint Stabilization And Direction Of 360° Videos, Chengzhou Tang, Oliver Wang, Feng Liu, Ping Tan

Computer Science Faculty Publications and Presentations

Three-hundred-sixty-degree (360°) video provides an immersive experience for viewers, allowing them to freely explore the world by turning their head. However, creating high-quality 360° video content can be challenging, as viewers may miss important events by looking in the wrong direction, or they may see things that ruin the immersion, such as stitching artifacts and the film crew. We take advantage of the fact that not all directions are equally likely to be observed; most viewers are more likely to see content located at “true north,” i.e., in front of them, due to ergonomic constraints. We therefore propose 360° video …

Context-Aware Synthesis For Video Frame Interpolation, Simon Niklaus, Feng Liu

Computer Science Faculty Publications and Presentations

Video frame interpolation algorithms typically estimate optical flow or its variations and then use it to guide the synthesis of an intermediate frame between two consecutive original frames. To handle challenges like occlusion, bidirectional flow between the two input frames is often estimated and used to warp and blend the input frames. However, how to effectively blend the two warped frames still remains a challenging problem. This paper presents a context-aware synthesis approach that warps not only the input frames but also their pixel-wise contextual information and uses them to interpolate a high-quality intermediate frame. Specifically, we first use a …

Good Similar Patches For Image Denoising (Poster), Si Lu

Computer Science Faculty Publications and Presentations

Patch-based denoising algorithms like BM3D have achieved outstanding performance. An important idea for the success of these methods is to exploit the recurrence of similar patches in an input image to estimate the underlying image structures....

High-Speed Video From Asynchronous Camera Array (Poster), Si Lu

Computer Science Faculty Publications and Presentations

Poster presented at: 2019 IEEE Winter Conference on Applications of Computer Vision (WACV)

A Study Of Sidewalk Autonomous Delivery Robots And Their Potential Impacts On Freight Efficiency And Travel, Dylan Jennings, Miguel A. Figliozzi

Civil and Environmental Engineering Faculty Publications and Presentations

E-Commerce and package deliveries are growing at a fast pace and there is an increased demand for same-day deliveries. Established delivery companies and new startups are investing in technologies that reduce delivery times and/or increase delivery drivers’ productivity. In this context, the adoption of Sidewalk Automated (or Autonomous) Delivery Robots (SADRs) has a growing appeal. SADRs are pedestrian sized robots that deliver items to customers without the intervention of a delivery person. Since SADRs travel on sidewalks they have been the subject of increasing regulation by local agencies in the US. The three research questions that guide this research effort …