Digital Commons Network^™

Developing Social Work Skills In Online Environments: What Online Msw Graduates Tell Us, Samuel W. Gioia

Dissertations and Theses

Social work education is an academic discipline that prepares students to support individual, family, and community wellbeing, and to advance policies for social equity. Despite the increasing use of online education for social work, many social work faculty believe that online Master of Social Work (MSW) programs do not adequately prepare graduates for direct practice (engagement, assessment, intervention, and evaluation) with vulnerable populations. Students from an online MSW program at a midsized urban research university were interviewed to learn (a) how well an online MSW prepared these students for direct practice with individuals, families, and communities; and (b) what instructional …

Method Of Modeling The Swing Equation Using Time Synchronized Measurements, Robert Matthew Ferraro

Dissertations and Theses

In three phase, high-voltage transmission systems, synchronous generators accelerate or decelerate to adapt to changing power transfer requirements that occur during system disturbances. In network electrical power systems, frequency changes constantly based on system dynamics. Modeling network dynamics from oscillations and transients using time-synchronized measurements can provide real-time information, including angular displacements, voltage and current phasors, frequency changes, and rate of signal system decay from positive-sequence components.

Power system voltage and current waveforms are not steady-state sinusoids, especially during system disturbances. These waveforms contain sustained harmonic and non-harmonic components. Additionally, because of faults and other switching electromagnetic transients, there may …

Claiming Miscommunication To Justify Rape: The Role Of Liking The Perpetrator, Alyssa Marie Glace Maryn

Dissertations and Theses

In this dissertation, four experiments tested whether sharing an ingroup with a sexual violence perpetrator (vs not sharing an ingroup) makes individuals more likely to view the survivor's consent refusal as insufficient. Although most people communicate sexual consent indirectly and nonverbally, individuals often report that indirect and nonverbal consent refusals are an insufficient form of non-consent. These claims of consent miscommunication might be used to justify instances of sexual violence when an individual is motivated to do so. I hypothesize that sharing an ingroup identity with a perpetrator might motivate individuals to justify sexual violence, leading them to report that …

Photoemission Electron Microscopy For Direct Observation Of Photonic And Plasmonic Phenomena, Theodore Stenmark

Dissertations and Theses

Photoemission electron microscopy (PEEM) is a high-resolution microscopy technique that collects photoemitted electrons from the sample surface to form an image. PEEM offers a non-scanning imaging method with a spatial resolution in the range of 5-100nm by combining the advantages of light excitation and electron imaging. Our work looks at PEEM as an analysis tool for photonic and plasmonic phenomena. Photonic wave guiding structures exhibiting a strong dispersion relation have attracted considerable attention for applications in integrated optics, communications and sensing devices. Line defects in a photonic crystal (PC) slab offer a highly efficient way to create light with group …

Preventing Sexual Violence Through Understanding Perceptions Of Sexual Offenders, Judith G. Zatkin

Dissertations and Theses

In this dissertation, I present three complete manuscripts. I utilize social and community psychological theory, as well as criminological theory to better understand those who perpetrate sexual violence in two domains: child sexual abuse and college campus sexual assault. All three studies are conducted with an eye toward the prevention of sexual violence. In the first study, I conduct a complete psychometric analysis of the Modus Operandi Questionnaire, a comprehensive quantitative tool that examines offending patterns and tactics of those who commit child sexual abuse (Chapter II). An updated factor structure for this tool is presented, as well as recommendations …

Urban Lakes: Ecosystem Services And Management, Laura Costadone

Dissertations and Theses

Lakes provide a variety of ecosystem services and benefits that greatly contribute to urban sustainability. Despite the growing interest in integrating freshwater systems into management and policy decisions, urban lakes are often overlooked in land-use planning. Nutrient and pollutant runoff from the surrounding urbanized watershed result in water quality deterioration that negatively impact the lake ecological functions and related ecosystem services. The vulnerability and degradation of these urban ecosystems should be a matter of concern, especially considering that, in rapidly growing metropolitan areas, the demand for aesthetic and recreational services provided by urban lakes is increasing. The overall goal of …

Development Of A Design Guideline For Pile Foundations Subjected To Liquefaction-Induced Lateral Spreading, Milad Souri

Dissertations and Theses

Extensive loss of stiffness and strength in liquefied soils can cause large ground deformations during strong earthquake shaking. One of the major sources of damage in pile foundations in liquefied soil is the excessive deformation due to lateral spreading. Pile-supported wharves subjected to earthquake motions are expected to accommodate inertial loads imposed at pile head from the superstructure as well as the kinematic loads imposed on piles from the lateral ground deformations. Current design codes significantly vary on how to combine inertia and kinematic demands. Recent research on soil-foundation-structure interaction suffers from lack of experiment-based data. There is a serious …

Steady-State Transmembrane Water Exchange In Proliferating Cultures Of Saccharomyces Cerevisiae, Joseph O'Malley Armstrong

Dissertations and Theses

Cellular water exchange is often considered in terms of a change in volume, where a net flux of water moves across the cell membrane due to a change in osmotic pressure. Osmotic pressure can cause a cell to shrink or swell, however, rapid water exchange persists across the membrane even when the volume of the cell is constant. Steady-state transmembrane water exchange describes the exchange of water across the cell membranes which results in no net change in cell volume. This exchange is astonishingly rapid; the entire pool of intracellular water of a Saccharomyces cerevisiae cell may exchange 2-5 times …

Spectrum Modeling Of Rf Amplifiers Based On Intercept Points With Measurement Improvements, Siyuan Yan

Dissertations and Theses

Orthogonal frequency-division multiplexing has been developed into a popular modulation scheme for wireless communication systems, used in applications such as LTE and 5G. In wireless communication system, spectrum regrowth caused by RF amplifiers will generate distortions to both passband in use and adjacent channels such that the transmission quality will be degraded. The study of this dissertation aims to predict the spectrum regrowth for OFDM based signals at the output of a RF amplifier due to the nonlinearity. Based on Taylor polynomial coefficients, a power spectrum expression for amplified OFDM signals in terms of intercept points up to nth-order is …

Chemical Characterization Of Toxicologically Relevant Molecules In Cannabis Concentrates And Vaporizer Aerosols, Jiries Meehan-Atrash

Dissertations and Theses

Consumption of cannabis concentrates using the relatively novel non-combustion methods dabbing and vaping has steadily grown in popularity as cannabis legalization in North America has allowed increased access to sophisticated cannabis products and technology. In order to assess the safety of these products, it is necessary to gain a chemical understanding of the decomposition reactions that occur when the active ingredients are heated in the conditions seen when dabbing or vaping. This dissertation contains a manuscript that details efforts to structurally characterize a toxic cannabis concentrate adulterant, and three manuscripts that studied the chemical decomposition of the two primary cannabis …

Storing Intermediate Results In Space And Time: Sql Graphs And Block Referencing, Basem Ibrahim Elazzabi

Dissertations and Theses

With the advancement of data-collection technology and with more data being available for data analysts for data-intensive decision making, many data analysts use client-based data-analysis environments to analyze that data. Client-based environments where only a personal computer or a laptop is used to perform data analysis tasks are common. In such client-based environments, multiple tools and systems are typically needed to accomplish data-analysis tasks. Stand-alone systems such as spreadsheets, R, Matlab, and Tableau are usually easy to use, and they are designed for the typical, non-technical data analyst. However, these systems are limited in their data-analysis capabilities. More complex data …

A Narrative Critique Of The Film Loving (2016): How Narratives Help Us Understand Standpoint And Social Change, Chesney Jo Garnos

Dissertations and Theses

ABSTRACT The film Loving (2016) portrays the true story of the Loving v. Virginia (1967) plaintiffs in a narrative that individualizes the struggle against institutionalized oppression through a story of a couple’s love. This paper will show how (1) the narrative elements in the film Loving (2016) combine to influence the viewer’s understanding of social acceptance of interracial marriage in the United States; (2) the film’s depiction of Mildred Loving’s role in advocating for interracial marriage demonstrates the significant tenets of standpoint theory. This paper uses narrative criticism (Fisher, 1985) as a method of analysis and feminist standpoint theory (Harding, …

Exploring The Relationships Between Community Experiences And Well-Being Among Youth Experiencing Homelessness, Katricia Stewart

Dissertations and Theses

The current dissertation presents two published empirical studies and one new study informed by the findings and recommendations of the first two. The first study investigated how intrapersonal factors (self-esteem, psychological distress, and optimism) and social-contextual factors (social support, sense of community, and empowerment) relate to the psychological well-being of 100 youth experiencing homelessness. The results indicated that all six variables were significantly related to well-being, but the intrapersonal factors had a stronger association with psychological well-being than the social-contextual factors. The second manuscript is a qualitative study investigating what community means to youth experiencing homelessness, what communities they are …

Portland Urban Coyote Project: A Review Of Citizen Science's Utility For Researching Urban Canids And The Human Environment, Keith David Vanderbrooke

Dissertations and Theses

The Portland Urban Coyote Project (PUCP) is a citizen science project that allows community members to upload coyote (Canis latrans) sighting data to a database that is used to create a public web map; contributors often add observations as well. I analyzed one year of PUCP comment data in order to assess the utility of the citizen science methods used by PUCP for urban carnivore research. I code and summarize findings from PUCP's data, compare the extracted data to other research studies of urban coyote from other regions, and find that results from this analysis supports conclusions made …

From Molecules To Mountains: A Multi-Proxy Investigation Into Ancient Climate And Topography Of The Pacific Northwest, Usa, Alex Mclean

Dissertations and Theses

The modern Cascades are a north-south striking mountain range that intercepts Pacific Ocean-derived moisture resulting in orographic precipitation on the western flank and a relatively arid rain shadow in the lee. Because of the strong coupling between topography and climate and consistent moisture source (Pacific Ocean) throughout the year, the region is ideally situated for paleoclimate studies that utilize the isotopic composition (δ¹⁸O and δD) of meteoric water to determine when uplifts occurred. Here, I synthesize the spatial and temporal evolution of stable isotopes in paleowater proxies across the Pacific Northwest during the Cenozoic. New volcanic glass (δD) …

Oregon's Racial Purity Regime: The Influence Of International Scientific Racism On Law Enforcement, Legislation, Public Health, And Incarceration In Portland, Oregon During The Victorian And Progressive Eras (1851-1917), Katherine N. Bush

Dissertations and Theses

In 1983, the Oregon State legislature repealed the eugenic sterilization law that had been in use for 60 years. Initially passed during the Progressive era, this law epitomized the State's legacy of surveilling, policing, caging, and inflicting brutality on marginalized and racialized communities who were deemed dangerous, threatening, or contagious. Public health leaders, political officials, law enforcement authorities, and private charities worked together as a multivalent system to maintain racial purity in the State. This racial purity regime drew upon a legacy of international pseudo-scientific racism to justify and bolster policies, legislation, and practices that targeted impoverished communities, people of …

The Use Of Mayflies, Stoneflies And Caddisflies As Indicators Of Fine Sediment Pollution In Salmon-Bearing Streams Of The Pacific Northwest, Cory Michael Mccaffrey

Dissertations and Theses

Fine sediment (particles < 2 mm in diameter) deposition is a natural component of streams but in excess amounts it is harmful to aquatic biota. Fine sediment is the main cause of impairment in streams and rivers of the Pacific Northwest and it can lead to unsuitable spawning and rearing habitat for Endangered Species Act (ESA) listed Salmon and steelhead. From a regulatory perspective, fine sediment presents a challenge because it is difficult to measure in situ and to establish criteria that would indicate stream impairment. Consequently, there is considerable effort to develop biocriteria using stream macroinvertebrates that would help regulators determine if a stream is impaired by excessive fine sediment.

Stream macroinvertebrates are widely used to monitor and assess stream degradation because they are affected by the physical, chemical and biological conditions in a stream. In particular, the stream insects known as mayflies (Ephemeroptera, E), stoneflies (Plecoptera, P) and caddisflies (Trichoptera, T) are commonly used as a metric referred to as EPT richness. EPT taxa are well known as pollutant intolerant …

The Mode Less Traveled: Exploring Bicyclist Identity In Portland, Or, Christopher Johnson

Dissertations and Theses

This study explores bicyclist as a social identity in Portland, OR and a relatively under researched topic in the existing literature about transportation mode choice. The results indicate that bicyclists in Portland do have an understanding of what it means to be a bicyclist and particularly the normative behaviors associated with that social identity. Results also indicate that barriers to entry into this social group are quite low but the path to becoming someone who regularly chooses bicycling as a mode of transportation is not straightforward and is fraught with barriers that could easily discourage new group members. Bicyclists in …

Climatic Controls On The Kinematics Of The Hooskanaden Landslide, Curry County, Oregon, Kara Kingen

Dissertations and Theses

Slow-moving earthflows represent major sources of sediment transport and erosion and are problematic for the management of critical infrastructure. The Hooskanaden Landslide -- a slow-moving earthflow on the southwest coast of Oregon -- crosses US Highway 101 and has been a site of continued interest to the Oregon Department of Transportation (ODOT) due to the weak lithology, erosive environment, and recurrent surge behavior (every ~15 years). Past surges, including the most recent (2019), have occurred during the winter, suggesting that velocity changes are predominantly controlled by climatic inputs. To examine the response of the Hooskanaden Landslide to seasonal and other …

Modeling Tools For Analyzing Electrical Power Distribution Systems Impacted By Electric Vehicle Load Growth, Jacob Sheeran

Dissertations and Theses

Growing Electric Vehicle penetration presents unwanted problems to grid reliability. For nearly every EV there is corresponding household charging. High penetration of Electric Vehicle Service Equipment can lead to over loading of assets and under voltage conditions. In order to understand the effects EV have on a distribution system, studies have to be done for EVSE to understand how the distribution system is affected. Using advanced Power Engineering Simulation Software is often the best way to model systems due to the credibility of their software modules. For this thesis, I developed a suite of distribution system analysis tools using CYME …

"B-Ing Flexible" : Examining Creativity In Bisexual Employees, Megan Jane Snoeyink

Dissertations and Theses

Creativity is essential for organizations to remain competitive and profitable. Past evidence suggests diversity in organizations promotes creativity, however, the mechanisms through which diversity promotes creativity in the workplace are not yet understood. Diverse populations' unique experiences may promote creativity, particularly through cognitive flexibility. I investigate the potential for heightened creativity in diverse populations within the context of bisexuality. Specifically, I use the flexibility model of bisexuality to explain why bisexual employees may have greater cognitive flexibility and subsequent creativity than heterosexual employees. Additionally, I seek to understand the moderating role of supervisor support in this relationship. Participants were recruited …

Values Of Young Adults In An Increasingly Secular World, Joseph Daniel Eichenlaub

Dissertations and Theses

This thesis examines data from a religion and values survey entitled Young Adults and Religion in a Global Perspective (YARG) conducted in the spring of 2018. The data for this research comes from a sample of college undergraduates from diverse nations, Portland State being one of the sites sampled. This research investigates three main research questions: Do the values of college-age youth tend to be more individualistic, the less religious that they are? Do the irreligious still maintain moral values? And is irreligiosity related to a cosmopolitan-humanitarian outlook? This research finds that the overall sample is individualistic while still holding …

Evaluation Of Manual And Semi-Automated Deep-Seated Landslide Inventory Processes: Willapa Hills, Washington, Tiffany E. Justice

Dissertations and Theses

Recent advances in remote sensing data and technology have allowed for computational models to be designed that successfully extract landforms from the landscape. The goal of this work is to create one such semi-automated model to extract deep-seated landslides located in complex geomorphic terrain. This is accomplished using geographic object-based image analysis (GEOBIA) techniques, considered by leaders in the field of image analysis to have an advantage over traditional automated classification methods. GEOBIA methods can mimic human visual interpretation by including more characteristic features used to assess the relationship between image data and the ground surface such as color reflectance …

Public Perception Of Air Quality Risks In Portland, Oregon, Dawn Nolan

Dissertations and Theses

The availability and demand for localized air quality information from communities are on the rise. However, not all information and not all communities are the same. Effective engagement and communication strategies will depend on a community's existing knowledge, opinion about air quality, individual experiences with inequities, and more. This study aims to understand how people living in Portland, Oregon understand and experience air pollution as an environmental risk and examine the extent to which those risk perceptions relate to confidence in science and technology. This gap is critical because of the complex interaction between air pollution and the risk perception …

Creating Systems Of Shared Accountability For Early Leaver Students: Perspectives Of Principals, Lorna Kay Fast Buffalo Horse

Dissertations and Theses

Alternative high schools in the United States perform a significant role for students who drop out, are pushed out, or fall out of conventional high schools. An essential function of alternative high schools is to support some of the most underserved students in the country to graduate from high school. High school graduation is a major factor associated with higher incomes, better health, longer life expectancy, and less involvement in the criminal justice system. It also positively impacts local, state, and national economies. Despite these positive impacts, many alternative high schools are stigmatized as low-performing and even "drop-out factories" by …

The Soniferous Experience Of Public Space: A Soundscape Approach, Kenya Dubois Williams

Dissertations and Theses

This research explores the awareness and perceptions of practitioners regarding the role of the soundscape in understanding and managing public spaces. Without considering the role of the soundscape as part of public spaces, urban planners, designers, and policy officials cannot accurately engage in placemaking that provides a complete sensory experience. The antiquated practice of enforcing noise codes has been the traditional approach to mitigate noise (unwanted sounds). However, sound is an overlooked element in the sensory experience of cities and how individuals and communities construct a "sense of place." This study considers the implications of the soundscape approach and soundwalks …

The Dark Triad And Impulsivity: Predictors And Correlates Of Workplace Representative Task Problem Solving And Decision Making, Peter Kendall Glazer Jr.

Dissertations and Theses

This research investigated group and individual differences in decision-making and problem-solving on workplace representative tasks, and whether certain personality traits correlated with or were predictors of participant strategy. In parallel studies done online (N = 214) and in-person (N = 80) with Portland State University undergraduate School of Business students, performance was measured on two workplace representative tasks under two different difficulty conditions. The Number Place experiment resulted in two major findings: First, when given a comparatively easy task, women had more Time Remaining than men. However, this was moderated by the difficulty condition, such that men had more Time …

Biological Invasions In Coastal Marine Ecosystems: How Changes In Trade Are Linked To Ballast Water Delivery Of Nonindigenous Species, Danielle Elizabeth Verna

Dissertations and Theses

Globalization has escalated transfers of nonindigenous species (NIS) across natural dispersal barriers. The resulting biological invasions have become a leading global mechanism of ecological change. NIS are often transported between coastal marine ecosystems in the ballast water of commercial ships, and patterns of NIS introduction and establishment can be linked to global trade dynamics. Here I examined drivers of trade and ballast water across spatial and temporal extents of invasion. The analyses incorporated a variety of datasets on trade, industries, and ship behavior to identify fluctuations in globally transported commodities that lead to changes in maritime shipping patterns and frequency. …

Exploring "What Works" In Veterans Affairs Home-Based Primary Care, Elizabeth Catherine Hulen

Dissertations and Theses

Home Based Primary Care (HBPC) is an interdisciplinary care model involving comprehensive primary care services for patients with chronic illness who are unable to access clinic-based care. The largest HBPC program in the United States is run by the Department of Veterans Affairs (VA) and provides team-based primary care service to Veterans with complex, chronic conditions. The VA HBPC model includes primary care visits from a physician, nurse practitioner, or physician assistant, nurse care management, service coordination by a social worker, mental health services from a social worker or psychologist, nutrition counseling from a dietician, and help with medication management. …

Walking As A Way Of Knowing: An Autoethnography Of Embodied Inquiry, Lauriel-Arwen Amoroso

Dissertations and Theses

The purpose of this study was to understand and describe the role of walking in my own ways of knowing and to explore how walking itself is an epistemological process by using personal narrative to examine and story my experience. I used an embodied narrative research method, known as evocative autoethnography, in which I explored my own innate ways of knowing, including intellectual, embodied, emotional, and spiritual knowledge. I collected data using field notes, reflective journaling, reviewing past writing, and artistic interpretations of experiences such as photography and poetry. I compiled my data into a series of short essays, stories, …