Digital Commons Network^™

The Design, Implementation, Evaluation And Results Of A Race Car For The Collegiate Formula Sae Electric Competition, Quinn Jasha Bryan Sullivan

Dissertations and Theses

The Formula SAE Electric competition is a collegiate autocross event in which teams design, build, and race an open-wheeled electric race car. The main motivation is the efficiency advantage of electric motors over internal combustion motors. This thesis presents the design and evaluation of two generations of Portland State University electric race cars.

The constraints are the competition rules, finances, human resources, and time required to complete a race car in one year. The design includes the implementation of existing components: battery cells, controllers, electric motors, drivetrains, and tire data for an optimized race car. Also, several circuits were designed …

Time Spent Away, Andrew Mitin

Dissertations and Theses

After the death of his father, Joshua Klein drops out of college and moves to Chicago. Alone in the city and with nothing of consequence to do, he attempts to justify to himself the ways of God, the sense of an early death and what is the good to do in life.

In this excerpt of Time Spent Away, Joshua seeks out the hidden aspects of the city and his spirit. Guided by his father's Bible and the formative texts of his undergraduate coursework, he sets out to complete his own education. During a tour of The Auditorium Building …

Inequality, Position, And Perception: Understanding And Addressing Workplace Harassment In Oregon's Construction Trades, Sasha Mae Bassett

Dissertations and Theses

Does our status impact the way we interpret change? This study proposes that one's level of power within their workplace, as granted by their role within the organization, shapes the way in which people interpret adjustments to the norms of that organization. Drawing on qualitative focus groups with forty-four members of Oregon's construction trades, this study examines the relationship between participants' position within the industry's structure and their opinions about the changing job site norms brought on by recent waves of diversification in the workforce. Findings suggest that within Oregon's construction trades, hierarchical distribution of power via industry position serves …

Bee Cause: Is Legislative Action Protecting Bees From Neonicotinoids Justified?, Ursula A. Squire

Dissertations and Theses

The potential harm caused to bees and other pollinators by the widespread use of neonicotinoids has the capacity to pose a real and immediate threat to both the environment and humans. The benefits that bees and other pollinators provide, combined with the potential of harm they may face, are important enough to warrant a more comprehensive testing apparatus by which to evaluate threats to their population. Environmentally, bees and other pollinators are an important piece of ecosystemic balance--from pest management to pollination of plants that are a part of many species' diet. Anthropologically speaking, the way of life humans have …

An Interpretive Phenomenological Analysis Of Long-Term Mentoring Relationships From The Youth Perspective, Kevin Richard Jones

Dissertations and Theses

When mentoring programs are well-designed and well-implemented, young people can experience positive gains in a number of social, emotional, behavioral, and educational areas. While some of the processes underlying mentoring relationships have been explored, the voices and perspectives of participants themselves have thus far been largely excluded from the mentoring literature. The lack of participant voice in mentoring research suggests that an important source of empirical and interpretive information is unavailable to the field in the process of designing, implementing, and researching mentoring programs. This study used interpretive phenomenological analysis (IPA) to explore how youth participants in the Friends of …

Watershed Management And Private Lands: Moving Beyond Financial Incentives To Encourage Land Stewardship, Matthew Thomas Deangelo

Dissertations and Theses

Public water utilities are tasked with providing high quality, inexpensive water often sourced from watersheds representing a diverse mix of public and private land ownership. There is increasing recognition amongst water resource managers of the role that private landowners play in determining downstream water quality, but bringing together landowners with a wide variety of land management objectives under the umbrella of watershed stewardship has proven difficult. Recently, a large number of "Payment for Watershed Services" programs have aimed to engage private landowners in watershed stewardship initiatives by offering financial incentives for adopting watershed best management practices. However, a growing field …

Frequency Multiplication In Silicon Nanowires, Marius Mugurel Ghita

Dissertations and Theses

Frequency multiplication is an effect that arises in electronic components that exhibit a non-linear response to electromagnetic stimuli. Barriers to achieving very high frequency response from electronic devices are the device capacitance and other parasitic effects such as resistances that arise from the device geometry and are in general a function of the size of the device. In general, smaller device geometries and features lead to a faster response to electromagnetic stimuli. It was posited that the small size of the silicon nanowires (SiNWs) would lead to small device capacitance and spreading resistance, thus making the silicon nanowires useful in …

Anachronisme, Rebuts Et Survivances Dans Les Escaliers De Chambord Et Le Dernier Royaume De Pascal Quignard, Etienne Lussier

Dissertations and Theses

This thesis investigates the particular conception of time developed by Pascal Quignard in his series Dernier Royaume and his novel Les escaliers de Chambord. We argue that this conception of time, which Quignard refers to as Le Jadis, operates through an anachronistic method based on a semiotic apparatus of waste, or rejects. The argument is presented in three different chapters. The first chapter uses the work of Jacques Rancière and Georges Didi-Huberman to show the way in which the concept of anachronism embraces a temporality that blurs the lines between past, present, and future and creates openings to …

Biofouling Management In The Pacific Northwest And Predation On Native Versus Non-Native Ascidians, Erin Suzanne Kincaid

Dissertations and Theses

Marine non-native species threaten economic and environmental health, making it crucial to understand factors that make them successful. Research on these species, therefore, allows for greater preparedness and informed management of biological invasions and increases understanding of elements structuring biological communities. Among the marine non-native species, and particularly the fouling community, non-native ascidians are a taxon of particular concern because they can crowd out native benthic species and smother mariculture products. This thesis addresses management for ascidians and other fouling organisms and includes research on the invasiveness of this taxon in addition to the invasibility of recipient fouling communities. On …

Wake Character In The Wind Turbine Array: (Dis-)Organization, Spatial And Dynamic Evolution And Low-Dimensional Modeling, Nicholas Michael Hamilton

Dissertations and Theses

To maximize the effectiveness of the rapidly increasing capacity of installed wind energy resources, new models must be developed that are capable of more nuanced control of each wind turbine so that each device is more responsive to inflow events. Models used to plan wind turbine arrays and control behavior of devices within the farm currently make questionable estimates of the incoming atmospheric flow and update turbine configurations infrequently. As a result, wind turbines often operate at diminished capacities, especially in arrays where wind turbine wakes interact and inflow conditions are far from ideal. New turbine control and wake prediction …

Assessment Of A Mycorrhizal Fungi Application To Treat Stormwater In An Urban Bioswale, Alaina Diane Melville

Dissertations and Theses

This study assessed the effect of an application of mycorrhizal fungi to stormwater filter media on urban bioswale soil and stormwater in an infiltration-based bioswale aged 20 years with established vegetation. The study tested the use of commercially available general purpose biotic soil blend PermaMatrix^® BSP Foundation as a treatment to enhance Earthlite^™ stormwater filter media amelioration of zinc, copper, and phosphorus in an ecologically engineered structure designed to collect and infiltrate urban stormwater runoff before it entered the nearby Willamette River.

These results show that the application of PermaMatrix^® BSP Foundation biotic soil amendment to Earthlite …

(Re)Presenting Peoples And Storied Lands: Public Presentation Of Archaeology And Representation Of Native Americans In Selected Western U.S. Protected Areas, Cerinda Survant

Dissertations and Theses

Every year, hundreds of thousands of people visit the Native American ancestral lands in the western United States developed for tourism and recreation. The stewards of these lands seek to engage visitors and enrich their experience, and simultaneously to protect the lands' natural and cultural resources. To achieve their mission, protected areas regularly use interpretation -- materials and experiences that aim to educate visitors about resources and see them as personally meaningful. However, there is little literature on interpretive content in protected areas, few qualitative studies of interpretation as constructed by visitors and interpreters, and little literature on the representation …

Language, Memory, And Exile In The Writing Of Milan Kundera, Christopher Michael Mccauley

Dissertations and Theses

During the twentieth century, the former Czechoslovakia was at the forefront of Communist takeover and control. Soviet influence regulated all aspects of life in the country. As a result, many well-known political figures, writers, and artists were forced to flee the country in order to evade imprisonment or death. One of the more notable examples is the writer Milan Kundera, who fled to France in 1975. Once in France, the notion of exile became a prominent theme in his writing as he sought to expose the political situation of his country to the western world--one of the main reasons why …

Transgender Patients' Experiences Of Discrimination At Mental Health Clinics, Corrine Ann Stocking

Dissertations and Theses

The transgender population is makes up about 0.3% of the U.S. population (Gates 2011). The term transgender is both an identity and an umbrella term used to describe people who do not adhere to traditional gender norms (Institute of Medicine 2011). Transgender people experience many barriers to services, negative health outcomes, and discrimination (Fredrikson-Goldsen et al. 2013; Institute of Medicine 2011; Eliason et al. 2009; Hendricks & Testa 2012). Mental health clinics are an important site for understanding transgender peoples' experiences due to being a gatekeeper for other medical services and their role in helping transpeople with issues surrounding coming …

Biomimetic Tools In Oxidative Metabolism: Characterization Of Reactive Metabolites From Antithyroid Drugs, Kudzanai Chipiso

Dissertations and Theses

Toxicities of sulfur-based drugs have been attributed to formation of highly reactive sulfur oxo-acids and depletion of glutathione by the formation of reactive metabolites. Metabolic activation of these sulfur centers to conceivably toxic reactive metabolites (RMs) that can covalently modify proteins is considered the initial step in drug-induced toxicity. Despite considerable effort and research, detection and characterization of these RMs during drug development and therapy remains a challenge. Methimazole (MMI) and 6-propyl-2-thiouracil (PTU) are two commonly used antithyroid, sulfur-based drugs. Though effective, these drugs are associated with idiosyncratic toxicity. PTU has acquired a black box warning and physicians are calling …

Examining Generational And Gender Differences In Parent-Young Adult Child Relationships During Co-Residence, Lauren Elizabeth Ferguson

Dissertations and Theses

Young adults of the twenty-first century face a long path to adulthood marked by uncertainty and lack of stability. In response, young adults are heading back to or failing to leave their family homes in higher numbers than generations before (Jacobsen and Mather 2011; Qian 2012). These macro-level trends bring about questions about their impact on family relationships as well as how these relationships have evolved over time. My thesis investigates parent-child relationships during co-residence with a specific focus on generation and gender differences. Through secondary data analysis of the National Survey of Families and Households, I explore how parent-child …

Does The School Day Matter? The Association Between Adolescent School Attachment And Involvement And Adult Criminal Behavior, Madeline O'Neil

Dissertations and Theses

Research with adolescence demonstrates school involvement and attachment greatly influences students' outcomes and choices outside of their school environment. Many studies have addressed whether delinquent behavior while in adolescence is associated with various aspects of schooling, but there is limited research looking at the long-term effects schooling has on criminal behavior in adulthood. The purpose of this study was to assess whether students' attachment to their school or involvement in extracurricular activities at school shapes students' outcomes in adulthood--specifically their criminality and likelihood of being arrested. In addition, this study took on a gendered relationship, examining how gender moderates the …

A Utility-Scale Deployment Project Of Behind-The-Meter Energy Storage For Use In Ancillary Services, Energy Resiliency, Grid Infrastructure Investment Deferment, And Demand-Response Integration, Joseph Nathanael Wilson

Dissertations and Theses

Electric utilities are increasingly incentivized to integrate new renewable energy generation resources to their systems; however, operations-related issues arise due to the non-dispatchable and stochastic nature of these renewable energy sources. These characteristics lead to a variety of issues for utilities, among which are voltage fluctuations, balancing dispatch against ramping events, short-duration power fluctuations, and the need to invest in peaking generation facilities just to accommodate the renewable energy. A traditional solution to these issues is to employ renewable generation-following techniques using either newly constructed gas peaking plants, or by shifting existing generation resources to this following responsibility. Unfortunately, use …

The Investigation And Optimization Of A Two-Heat-Pump System Incorporating Thermal Storage For Shaping Residential Heating Load, Emily Lord Barrett

Dissertations and Theses

Portland General Electric has proposed coupling one or more water tanks with two heat pumps in order to perform load-shifting in residential customer heating and cooling applications. By using the water tanks as a thermal storage unit, this project attempts to partially decouple energy consumption from generation to provide peak demand reduction and to better facilitate the integration of variable renewable energy resources. A scoping study was performed to evaluate the potential impact of this project if implemented in single family homes in Portland, Oregon. This study revealed that the system could provide meaningful savings in the cost of electricity …

Connecting To Nature, Community, And Self: A Conservation Corps Approach To Re-Engaging At-Risk Youth In Science Education, Sara Jo Linden

Dissertations and Theses

The social and environmental challenges of the coming decades will require that individuals possess environmental literacy: the understanding of natural systems combined with a sense of care for the earth, and the confidence and competency to act on its behalf. At the same time, disengaged youth need education environments that foster belonging and promote affective outcomes. The youth conservation corps model provides a natural context for engaging academically at-risk youth in environmental science education, while fostering connection to nature and student self-efficacy in ways that are experiential, relevant, and relationship-based. The focus of this study was a conservation corps program …

Investigating The Origin And Functions Of A Novel Small Rna In Escherichia Coli, Fenil Rashmin Kacharia

Dissertations and Theses

Non-coding small RNAs (sRNAs) regulate various cellular processes in bacteria. They bind to a chaperone protein Hfq for stability and regulate gene expression by base-pairing with target mRNAs. Although the importance of sRNAs in bacteria has been well established, the mode of origination of novel sRNA genes is still elusive, mainly because the rapid rate of evolution of sRNAs obscures their original sources. To overcome this impediment, we identified a recently formed sRNA (EcsR2) in E. coli, and show that it evolved from a degraded bacteriophage gene. Our analyses also revealed that young sRNAs such as EcsR2 are expressed …

Identity Construction And Language Use By Immigrant Women In A Microenterprise Development Program, Linda Eve Bonder

Dissertations and Theses

Researchers have explored immigrant identity in various contexts, but few studies have examined identity in low-income immigrant women entrepreneurs. To address this research gap, I conducted in-depth interviews with eight low-income Latino immigrants who were starting their own businesses and receiving support through a local microenterprise development program (MDP). The study explored how participants' microenterprise efforts affected their identities and their investments in learning English.

The research found that entrepreneurship promoted positive identity construction by providing opportunities for participants to develop personal and cultural pride, strengthened parental roles, and interdependence with the community. These benefits helped participants decrease family stress …

Stellar Works: Searching For The Lives Of Women In Science, Jennifer Elizabeth Woodman

Dissertations and Theses

While women have had a profound impact in the world of science, they struggle to gain an equal foothold in many science, technology, engineering, and mathematics (STEM) fields today. This has led to considerable public and private sector efforts to recruit women into these arenas. In order to understand how schools and nonprofits engage today's young women in STEM studies, this account includes time spent both in high school science classrooms and with ChickTech -- a Portland-based organization that works to provide a pathway into tech careers for high school-aged girls.

A historical perspective reveals that modern women aren't treading …

Complete Design Methodology Of A Massively Parallel And Pipelined Memristive Stateful Imply Logic Based Reconfigurable Architecture, Kamela Choudhury Rahman

Dissertations and Theses

Continued dimensional scaling of CMOS processes is approaching fundamental limits and therefore, alternate new devices and microarchitectures are explored to address the growing need of area scaling and performance gain. New nanotechnologies, such as memristors, emerge. Memristors can be used to perform stateful logic with nanowire crossbars, which allows for implementation of very large binary networks that can be easily reconfigured. This research involves the design of a memristor-based massively parallel datapath for various applications, specifically SIMD (Single Instruction Multiple Data) like architecture, and parallel pipelines. The dissertation develops a new model of massively parallel memristor-CMOS hybrid datapath architectures at …

Escritos Para Desocupados (2013) De Vivian Abenshushan: De Contraensayos, Libros Aumentados Y Vanguardias De Liberación, Gloria M. Robayo Trujillo

Dissertations and Theses

The present study focuses on Escritos para desocupados (Writings for the Unoccupied), a 2013 work by Mexican author Vivian Abenshushan, as a multifaceted book that poses challenges for literary studies, book studies, and the reader in general. From a textual perspective, Escritos para desocupados is a shape-shifter. That is, depending on how the reader accesses its content, it can be a blog-book, a web-book, a printed book or a digital PDF-book. Using a term coined by the author, the "augmented book," I seek to encompass a phenomenon that is no longer unusual, the publication of a text in different media. …

On Both Sides Of The Tracks: Light Rail And Gentrification In Portland, Oregon, Nathan Eric Rochester

Dissertations and Theses

This study draws on census data and geographic information systems (GIS) to investigate the relationship between light rail transit (LRT) infrastructure development and gentrification in Portland, Oregon. While recent research using comprehensive measures of neighborhood socioeconomic status (SES) supports a potentially causal link between transit development and gentrification, research into the effects of transit on property values alone tends to dominate the discourse. This study therefore seeks to build on previous research to develop an index measure of neighborhood SES and SES change based on measures of education, occupation, and income, using census data from 1980-2010. This multifaceted measure of …

The Terroir Of Pinot Noir Wine In The Willamette Valley, Oregon : A Broad Analysis Of Vineyard Soils, Grape Juice And Wine Chemistry, Kathryn Nora Barnard

Dissertations and Theses

Terroir is determined by a combination of factors in the vineyard including the grape varietal, geology and soil, soil hydrology, physiography, and climate. Although most studies have examined regional differences in wine flavors and associated provenance of wine based on chemistry, few have examined the chemistry of the soil and the ability to trace that chemistry to grape juice and, finally, to the wine. This dissertation examines what soil physical and chemical differences specific to this region might influence grape juice chemistry and wine chemistry.

Wine-grapes in the Willamette Valley, Oregon, are grown on three major soil parent materials: volcanic, …

Gritos En El Desierto: Denuncia Y Resistencia En Las Obras De Las Escritoras Wayuu Estercilia Simanca Pushaina Y Vicenta Marí­A Siosi Pino, Lindsay H. Perwak

Dissertations and Theses

The way we read and interpret literature is frequently influenced by factors that operate beyond the scope of the average reader's awareness. In this thesis, selected works by two Wayuu writers, Estercilia Simanca Pushaina and Vicenta Maria Siosi Pino, are analyzed and interpreted in an attempt to unveil some of these behind-the-scenes agents and issues, as well as explore how the stories' classification in the children's literature genre reveals a deep-rooted colonial tendency to infantilize indigenous individuals in contemporary Colombia.

Despite the fact that the two authors, both mestizo women who self-identify with the Wayuu indigenous group of northern Colombia, …

Stranding Mortality Patterns In California Sea Lions And Steller Sea Lions In Oregon And Southern Washington, 2006 To 2014, Kessina Lee

Dissertations and Theses

As changing ocean conditions lead to declining fish stocks and movement of forage fish, sea lions on the Oregon coast are subject to the pressures of declining prey availability and increasing conflicts with commercial and recreational fisheries. An analysis of strandings of California sea lions, Zalophus californianus, and Steller sea lions, Eumetopias jubatus, from 2006 to 2014, included cause of death, changing ocean conditions, and anthropogenic activity. Causes of death included disease, injury, and human interaction, such as gunshot wounds, fisheries net entanglements and boat strikes.

Oregon and Washington strandings of California sea lions are primarily adult and …

Investigating The Potential Of Land Use Modifications To Mitigate The Respiratory Health Impacts Of No2: A Case Study In The Portland-Vancouver Metropolitan Area, Meenakshi Rao

Dissertations and Theses

The health impacts of urban air pollution are a growing concern in our rapidly urbanizing world. Urban air pollutants show high intra-urban spatial variability linked to urban land use and land cover (LULC). This correlation of air pollutants with LULC is widely recognized; LULC data is an integral input into a wide range of models, especially land use regression models developed by epidemiologists to study the impact of air pollution on human health. Given the demonstrated links between LULC and urban air pollution, and between urban air pollution and health, an interesting question arises: what is the potential of LULC …