Digital Commons Network^™

Strength Tuned Steel Eccentric Braced Frames, Hosam Abdullah Al-Azzawi

Dissertations and Theses

The primary component in eccentrically braced frames (EBF) is the link as its plastic strength controls the design of the frame as well as the entire building within which it is installed. EBFs are the first part of building design and every other component is sized based on the forces developed in the link. Oversized link elements lead to the use of unnecessary materials and can increase construction costs. Additionally, the advantages of using a continuous member of the same depth for both the link and the controller beam (in terms of the cost and the time) motivates researchers to …

Uhf And Microwave Phase-Modulated Scattering Array, Nasr Nomas Hussein Alkhafaji

Dissertations and Theses

This dissertation investigates the use an array of active nonlinear elements, with particular emphasis on controlling distortion products generated by nonlinear elements in space rather than using conventional ways such as transmission lines, waveguides, and power dividers and combiners. The nonlinear elements are made of assemblies of antennas and electronic switches, called modulated scatterers (MSs). These so-called MSs elements are utilized in a wide variety of applications such as radio frequency identification (RFID) systems, microwave imaging, Internet-of-Things sensors, etc. However, no research work has been reported in the literature regarding exploiting and controlling several distortion products generated by MSs at …

Analytical And Numerical Modeling Of Long Term Changes To Tides, Storm Surge, And Total Water Level Due To Bathymetric Changes And Surge Characteristics, Ramin Familkhalili

Dissertations and Theses

Natural and local anthropogenic changes in estuaries (e.g., sea-level rise, navigation channel construction and loss of wetlands) interact with each other and produce non-linear effects. There is also a growing recognition that tides in estuaries are not stationary. These factors together are changing the estuarine water level regime, however the implications for extreme water levels remain largely unknown. Changes over the past century in many estuaries, such as channel deepening and streamlining for navigation have significantly altered the hydrodynamics of long waves, often resulting in amplified tides (a ~85% increase in Wilmington, NC since 1900) and storm surge in estuaries. …

Impactful Care: Addressing Social Determinants Of Health Across Health Systems, Nicole Lisa Friedman

Dissertations and Theses

There is emerging evidence that addressing health-related social needs through enhanced clinical-community linkages can improve health outcomes and reduce costs. Unmet health-related social needs, such as food insecurity, inadequate or unstable housing, and lack of access to transportation may increase the risk of developing chronic conditions, reduce an individual's ability to manage these conditions, increase health care costs, and lead to avoidable health care utilization. In response, work on social needs is happening across large health systems in the United States, but the pace of progress is slow and accountability is diffuse.

The goal of this applied research project is …

Radical Doulas Make "Caring A Political Act": Full-Spectrum Birthwork As Reproductive Justice Activism, Jadee Yvonne Carathers

Dissertations and Theses

This study, based on in-depth interviews with 30 self-identified radical doulas working in the US, describes the radical practices, positionality, and orientation towards reproductive justice that distinguish these care workers from mainstream doulas. Radical doulas provide nonjudgmental support in a full-spectrum of reproductive experiences from menarche to menopause according to the needs of their clients. As non-medically trained care workers, they provide informational, emotional, and physical support during abortion, birth and postpartum, fetal loss, adoption, or surrogacy, enacting individualized skill sets across settings from homes to hospitals and clinics. Radical doulas are paid professionals, but often offer a sliding-scale for …

Tree Canopy Cover And Potential In Portland, Or: A Spatial Analysis Of The Urban Forest And Capacity For Growth, Jeff Ramsey

Dissertations and Theses

Urban forests have positive impacts on human and ecosystem health, reduce stress on aging stormwater infrastructure, increase property values, and reduce energy consumption. The scale of these benefits ranges from the hyper-local to the global. While the benefits of urban forests can extend well beyond the boundaries of cities, they often do not reach all residents of the city equally. Urban forest policies do not adequately address environmental equity or employ planting strategies with knowledge of the social and political factors that determine the spatial variations of tree canopy extent in cities. Chapter I analyzes the determinants of current canopy …

Next Generation Science Standards And Physics First: A Case Study Of High School Teachers' Beliefs And Practices, Stephen Godfrey Scannell

Dissertations and Theses

This dissertation is a case study of a school district in the Pacific Northwest that developed three-year high school science curricula using a Physics First course sequence (Physics, Chemistry, Biology), with the crosscutting concept Patterns as the central theme of the courses. The purpose of the study was to examine the impact of the implementation of the 9th grade course, Patterns Physics, on teacher practice and beliefs about science teaching and determine whether this new approach facilitated teacher classroom practices and beliefs congruent with those expressed in A Framework for K-12 Science Education (NRC, 2012) and the Next Generation Science …

"It's All Because I Like The Person That's Teaching Me": Masculinities, Engagement, And Caring Relationships In Secondary Schools, Cristy Lauren Weggelaar

Dissertations and Theses

U.S. schools face a well-documented gender gap within some important educational and social indicators. In the United States, boys and young men are significantly more likely than girls and young women to be diagnosed with a learning disability, leave high school without a diploma, receive failing grades in core classes, and be suspended or expelled from school. This study uses an interpretive research framework to investigate the relationship between this gender gap in education and constructions of masculinity, social and cultural capital, agency, caring and resistance in secondary schools. Data collected through interviews with young men who engaged in acts …

An Investigation Of The Impact Of High School Student Fine Arts Course Accumulation On Mathematics Course Achievement, Daniel Mackin Freeman

Dissertations and Theses

Science, technology, engineering, and mathematics (STEM) educational achievement is vital to economic competitiveness in the United States and abroad. Despite a concerted effort, the US lags well behind many similarly developed nations. Research suggests that the integration of fine arts education into traditional STEM curriculum (STEAM) boosts academic achievement in STEM subjects and closes gaps between low- and high-socioeconomic status students. Justifications for STEAM programs are based, however, on the unexamined assumption, for one, that fine arts courses instill creative and critical thinking skills that can be transferred to STEM subjects. The present study explores the impact of taking fine …

Seismic Performance Of Substandard Reinforced Concrete Bridge Columns Under Subduction-Zone Ground Motions, Alvaro Francisco Lopez Ibaceta

Dissertations and Theses

A large magnitude, long duration subduction earthquake is impending in the Pacific Northwest, which lies near the Cascadia Subduction Zone (CSZ). Great subduction zone earthquakes are the largest earthquakes in the world and are the sole source zones that can produce earthquakes greater than M8.5. Additionally, the increased duration of a CSZ earthquake may result in more structural damage than expected. Given such seismic hazard, the assessment of reinforced concrete substructures has become crucial in order to prioritize the bridges that may need to be retrofitted and to maintain the highway network operable after a major seismic event. Recent long …

Context-Aware Wi-Fi Infrastructure-Based Indoor Positioning Systems, Huy Phuong Tran

Dissertations and Theses

Large enterprises are often interested in tracking objects and people within buildings to improve resource allocation and occupant experience. Infrastructure-based indoor positioning systems (IIPS) can provide this service at low-cost by leveraging already deployed Wi-Fi infrastructure. Typically, IIPS perform localization and tracking of devices by measuring only Wi-Fi signals at wireless access points and do not rely on inertial sensor data at mobile devices (e.g., smartphones), which would require explicit user consent and sensing capabilities of the devices.

Despite these advantages, building an economically viable cost-effective IIPS that can accurately and simultaneously track many devices over very large buildings is …

Integrating Work Ability Into The Organizational Science Literature: Advancing Theory And Developing The Nomological Network, Grant Brady

Dissertations and Theses

As the workforce ages, enabling individuals to work effectively across the lifespan is critical for individuals, organizations, and societies. Put simply, societies and organizations are beginning to face a "new normal" in which people must continue working later in life. Investigations of work ability (WA), an individual's ability to meet the demands of their job, is a line of research that facilitates our understanding of the factors related to working successfully across the lifespan. Although research has established that WA is influenced by a range of organizational and personal factors and linked WA to retirement and disability, a number of …

Distribution And Origin Of Carbide In Ordinary Chondrites, Karla Rae Farley

Dissertations and Theses

To understand the occurrence and distribution of carbide minerals in ordinary chondrites, thirty meteorites were examined, twenty-eight ordinary chondrites and two iron meteorites. The occurrence of carbide, textures, and chemical compositions were examined in the 7 carbide-bearing meteorites. Two formation methods for carbide have been presented in previous research. These are aqueous alteration and shock heating, and they are examined for validity in this thesis. Additionally, one other formation method for carbide formation through impact and brecciation is put forth and examined. Textural differences between the carbide-magnetite assemblages (CMAs) observed by Krot et al., (1997) and those seen in this …

Evaluating The Utility Of Theories Of Social Integration In Understanding Areal Suicide Rates In The United States, Nathan Finch Parsons

Dissertations and Theses

Despite over a century's worth of study, areal variations in suicide rate remain largely unexplained. In order to better understand these regional differences, this analysis aggregates county-level National Center for Health Statistics Multiple Cause of Death data with data from the US Census, the Association of Statisticians of American Religious Bodies, and the Penn State Northeast Regional Center for Rural Development to test the three leading conceptualizations of social integration (i.e. demographic, compositional, ecological) against US suicide rates. Results of negative binomial regression models indicate that an ecological measure, social capital, is substantially associated with suicide rate, while demographic and …

Snowy Plover Demography In Oregon, Eleanor Prindiville Gaines

Dissertations and Theses

A thorough understanding of demographic parameters and their contribution to overall population growth is fundamental to effective conservation of small populations, but this information is often lacking. The Pacific Coast population of the Western Snowy Plover (Charadrius nivosus nivosus) is listed as threatened and has been the target of long-term, multi-pronged management in Oregon. The Oregon coastal population has been intensively monitored since 1990, and over 80% of the population is color banded, but a comprehensive analysis of demographic parameters and the effect of management on vital rates and population growth has been unavailable until now. Here, the …

Learning From Culturally Specific Programs And Their Impact On Latino Parent Engagement, Analucia Lopezrevoredo

Dissertations and Theses

Latinos are the largest and fastest growing ethnic minority group in the United States. Academically, they are significantly trailing their non-Latino peers in graduation and overall educational attainment. Among many socioeconomic factors, parent engagement has been identified as being a defining indicator of student success. Reflective of racial and class disparities, this study explored with the use of critical race and intersectionality theory, that low Latino parent engagement is a result of the historical devaluing and omission of Latino culture, history and language from formal academic settings, and compounding social factors that make engagement complex for Latino immigrants in America …

Memcapacitive Reservoir Computing Architectures, Dat Tien Tran

Dissertations and Theses

In this thesis, I propose novel brain-inspired and energy-efficient computing systems. Designing such systems has been the forefront goal of neuromorphic scientists over the last few decades. The results from my research show that it is possible to design such systems with emerging nanoscale memcapacitive devices.

Technological development has advanced greatly over the years with the conventional von Neumann architecture. The current architectures and materials, however, will inevitably reach their physical limitations. While conventional computing systems have achieved great performances in general tasks, they are often not power-efficient in performing tasks with large input data, such as natural image recognition …

Making Imaginaries: Identity, Value, And Place In The Maker Movement In Detroit And Portland, Stephen Joseph Marotta

Dissertations and Theses

This dissertation explores the maker economy and culture in Detroit, MI and Portland, OR and queries the "Made in Place" branding strategy that relies so heavily on a shared imagination of cities, identities, and values. Bridging the gap between urban economic development, political economy, and affect theory, this dissertation is centrally concerned with how imagination works as a commons and how such "imaginaries" shape each city's milieu of small, entrepreneurial, artisanal producers ("makers"). The constituent elements of "Made in" branding "made" and "place" suggest common understandings of each; this sense of coherence is critical for how value is added to …

Closing The Loop: The Capacities And Constraints Of Information And Communication Technologies For Development (Ict4d), Phillip Nicholas Turman-Bryant

Dissertations and Theses

As a mechanism for collecting and sharing information, information and communications technologies (ICT) hold immense potential for individuals and institutions in low- and middle-income countries. Currently the distribution and adoption of ICTs--particularly mobile devices--has far outpaced the provision of other household services like clean water, sanitation, hygiene, or energy services. At the same time, the development and deployment of Internet of Things (IoT) devices including cellular- and satellite-connected sensors is facilitating more rapid feedback from remote regions where basic services are most limited. When used in conjunction with economic development or public health interventions, these devices and the feedback they …

The Ethical Challenges Of Community-Based Cs Training At Portland State, Joseph W. Christman

University Honors Theses

This literature review investigates Service Learning, the Capstone program at Portland State University, and the CS version of that Capstone program in particular in order to evaluate the ethical issues surrounding them. To achieve this, this paper is split into a few sections. There is an explanation of Service Learning, and a brief overview of its history. Following that is a summary of the history of the Capstone Program at Portland State including a description of the CS Capstone program at Portland State. After that the paper investigates some of the legal challenges surrounding the use of free labor. Next, …

Women And Corrections: A Review Of Oregon Prisoners' Perspectives On Procedural Justice, Kelci J. Mueller

University Honors Theses

This paper examines the perceptions of women prisoners in Oregon on procedurally just treatment and their attitudes of legitimacy towards agents of the criminal justice system. It argues that women in an Oregon prison perceived unjust treatment from criminal justice officials which leads to feelings of illegitimacy. 142 women from minimum and medium security at Coffee Creek Correctional Facility (CCCF) were surveyed about their interactions with police, defense attorneys, prosecutors, and judges. The research team analyzed survey responses to theoretically relevant questions such as when they were arrested, questioned by police, communicated with their defense attorney, plea bargain agreement, and …

Utilizing Parallelism In The Conjugate Gradient Algorithm, Adam James Craig

University Honors Theses

This paper develops the original conjugate gradient method and the idea of preconditioning a system. I also propose a unique type of additive-Schwarz preconditioner that can be solved in parallel, which creates a speed increase for large systems. To show this, I developed a C++11 linear algebra library used in conjunction with the OpenMP parallel computing library to empirically show a speed increase.

It's Not Just The White Girl: How Higher Education Professionals Support Transgender Survivors Of Sexual Assault, Hanna E. Luckett

University Honors Theses

The Obama Administration took important steps in extending civil rights and protections to the transgender community and even released the Dear Colleague Letter on Transgender Students in 2016 (Gupta and Lhamon). Despite the beginnings of this conversation, there are still very large gaps into which transgender students fall in Title IX compliance guidelines, let alone the educational system as a whole. It is approximated that 47% of transgender people have experienced or will experience acts of sexual violence (James et al, 2016) and Harris and Linder (2017) argue that most of these acts of violence are an exertion of power …

Defining And Measuring Equitable Access To Washington Park In Portland, Oregon, Marisa Zapata, Joseph Broach, Kara Boden, Qingyang Xie

TREC Final Reports

Explore Washington Park (EWP) is a 501c3 non-profit that serves as the Transportation Management Association for Washington Park. At 410 acres, Washington Park receives over 3 million visitors each year and is home to some of Portland’s most popular attractions including the International Rose Test Garden, Portland Japanese Garden, Oregon Zoo, Portland Children’s Museum, World Forestry, and Hoyt Arboretum. EWP, in partnership with Portland Parks & Recreation, provides transportation management and guest services to the park and its cultural institutions with the goal of decreasing the number of vehicle trips to the park. Since beginning its work in 2014, transit …

Living Streets: A Pathway Toward Inclusive, Equitable, And Accessible Pedestrian Streets, Eavan Moore, Kevin Tracy, Jason Nolin, Zoie Wesenberg, Oscar Saucedo-Andrade, Kate Wihtol

Master of Urban and Regional Planning Workshop Projects

Since 2009, the Portland Bureau of Transportation (PBOT) has aimed to prioritize pedestrians above all other transportation modes. By putting pedestrians first, cities can improve outcomes for communities and transform streets into welcoming public spaces. Pedestrian streets help achieve this goal by reallocating space that was once dedicated to the movement and storage of cars to spaces for people to interact, socialize, and recreate. By developing a typology and an evaluation framework for pedestrian streets, this document attempts to answer the question, what could pedestrian streets look like in Portland’s Central City?

Development Of The Aaspire Web Accessibility Guidelines For Autistic Web Users, Dora Raymaker, Steven K. Kapp, Katherine E. Mcdonald, Michael Weiner, Elesia Ashkenazy, Christina Nicolaidis

OHSU-PSU School of Public Health Faculty Publications and Presentations

Websites figure predominantly in everyday life. However, many websites remain inaccessible to autistic people, and existing efforts to improve accessibility are in early stages, do not directly include autistic users in their development, or have not been empirically evaluated. The Academic Autism Spectrum Partnership in Research and Education (AASPIRE) used a community-based participatory research approach to create a website to improve health care access for autistic adults. We used the creation of that website as a “living laboratory” to develop the AASPIRE Web Accessibility Guidelines for Autistic Web Users. Our guidelines are grounded in accessibility theory, had autistic end-user involvement …

Why Do Adults Read Young Adult Books?, Monica Hay

Book Publishing Final Research Papers

Young adult books are widely read by adults. Through interviews with publishing professionals and a survey of 2,139 participants, several reasons were discovered regarding why adults read young adult literature. In the research, the most common reasons were the influence of Harry Potter and Twilight, the relatability for millennials, the social media presence of YA online, and the success of women writers in the category. Survey participants had more to add. The survey themes were nostalgia, "less pretentious," "faster reads," diversity, escapism, "less graphic," and perhaps most importantly, hopeful.

A Cover Is Worth 1000 Words: Visibility And Racial Diversity In Young Adult Cover Design, Jenny Kimura

Book Publishing Final Research Papers

Diversity in young adult literature has been a hot topic in the publishing industry for many years now, and calls for diversity from the YA community, librarians, authors, and publishing professionals have garnered nationwide attention. But while the conversation around diverse content is well documented, few have considered how young adult cover design might have an impact on how diversity, especially in terms of race/ethnicity, is represented visually.

The research detailed in this paper compiles and analyzes data from 700 covers each from 2014 and 2018 respectively (1400 book covers total). In my quantitative analysis, I wanted to know whether …

Dementia-Related Neuropsychological Testing Considerations In Non-Hispanic White And Latino/Hispanic Populations, Shanna L. Burke, Mitra Naseh, Miriam Rodriguez, Aaron Burgess, David Loewenstein

School of Social Work Faculty Publications and Presentations

Hispanic individuals are at greater risk for health disparities, less than optimal health care, and are diagnosed at later stages of cognitive impairment than white non-Hispanics. Acculturation and different attitudes toward test-taking may result in decrements in performance, especially on unfamiliar measures that emphasize speed and accuracy. Non-Hispanic individuals often outperform Hispanic individuals on cognitive and neuropsychological measures in community and clinical populations. Current neuropsychological testing may not provide accurate data related to monolingual and bilingual individuals of Hispanic descent. Testing instruments were identified by searching academic databases using combinations of relevant search terms. Neuropsychological instruments were included if they …

Integrating Multiple Narratives In Human Behavior Across The Lifespan Curriculum, Amethyst R. Dawson

University Honors Theses

Bachelors' of Social Work programs have attempted to highlight diversity and multiculturalism since the 1960's, when the Council on Social Work Education (CSWE) required that social work, "must make special, continued efforts to enrich its program by providing racial, ethnic, and cultural diversity in its student body and at all levels of instruction and research personnel, and by providing corresponding educational supports." Despite this mandate, the actual application of diversity and multiculturalism in social work programs is marked by shortcomings.

To address this problem, some scholars have looked at the curriculum within social work programs, as well as different approaches …