Digital Commons Network^™

Cycle Structures Of Orthomorphisms Extending Partial Orthomorphisms Of Boolean Groups, Nichole Louise Schimanski, John S. Caughman Iv

Mathematics and Statistics Faculty Publications and Presentations

A partial orthomorphism of a group GG (with additive notation) is an injection π:S→G for some S⊆G such that π(x)−x ≠ π(y) for all distinct x,y∈S. We refer to |S| as the size of π, and if S=G, then π is an orthomorphism. Despite receiving a fair amount of attention in the research literature, many basic questions remain concerning the number of orthomorphisms of a given group, and what cycle types these permutations have.

It is known that conjugation by automorphisms of G forms a group action on the set of orthomorphisms of G. In this paper, we consider the …

Mitochondrial Dna Sequence And Lack Of Response To Anoxia In The Annual Killifish Austrofundulus Limnaeus, Josiah T. Wagner, Florisela H. Chavez, Jason E. Podrabsky

Biology Faculty Publications and Presentations

The annual killifish Austrofundulus limnaeus inhabits ephemeral ponds in regions of Venezuela, South America. Permanent populations of A. limnaeus are maintained by production of stress-tolerant embryos that are able to persist in the desiccated sediment. Previous work has demonstrated that A. limnaeus have a remarkable ability to tolerate extended periods of anoxia and desiccating conditions. After considering temperature, A. limnaeus embryos have the highest known tolerance to anoxia when compared to any other vertebrate yet studied. Oxygen is completely essential for the process of oxidative phosphorylation by mitochondria, the intracellular organelle responsible for the majority of adenosine triphosphate production. Thus, …

Gender Bias And The Evaluation Of Players: Voice And Gender In Narrated Gameplay Videos, Robin April Crowell

Dissertations and Theses

This study evaluates perception differences of male and female narrators in video game tutorials. Video games have long been considered a masculine pursuit, and because of this, women have endured unpleasant surroundings and interactions in gaming and related communities. With the proliferation of technologies like Twitch and YouTube gaming, gaming is more communicative than ever, increasing potential for problematic interactions. Recent booms in these technologies emphasize the importance of understanding how varying demographics are perceived, as these perceptions influence interactions, potentially limiting the likelihood of women and others' involvement and interest.

Involvement in technology during youth is associated with interests …

More Than Meets The Eye: Latino Students In A Two-Way Immersion Program And Stereotype Threat, Edgar Ubaldino Solares Vega

Dissertations and Theses

Figures from the 2010 Census indicate that there are 50.5 million Latinos (16% of the total population) living in the United States (US) today. From 2000 to 2010, the Latino population experienced a very rapid growth rate of 43%, which accounted for over half the total population growth. More and more Latino students are entering our public schools and face the reality that 62 years after the Brown V. Board of Education ruling to integrate schools and equalize educational opportunities, schools are more racially and economically segregated and more unequal than they were more than half a century ago. As …

Use Of Distance Weighted Metrics To Investigate Landscape-Stream Temperature Relationships Across Different Temporal Scales, Eric Craig Watson

Dissertations and Theses

Stream ecosystems have experienced significant negative impacts from land use, resource exploitation, and urban development. Statistical models allow researchers to explore the relationships between these landscape variables and stream conditions. Weighting the relevant landscape variables based on hydrologically defined distances offers a potential method of increasing the predictive capacity of statistical models. Using observations from three grouped watersheds in the Portland Metro Area (n=66), I have explored the use of three different weighting schemes against the standard method of taking an areal average. These four different model groups were applied to four stream temperature metrics: mean seven-day moving average maximum …

Quef And Quef-Like: Diverse Chemistries In A Common Fold, Adriana Bon Ramos

Dissertations and Theses

The tunneling fold (T-Fold) superfamily is a small superfamily of enzymes found in organisms encompassing all kingdoms of life. Seven members have been identified thus far. Despite sharing a common three-dimensional structure these enzymes perform very diverse chemistries.

QueF is a bacterial NADPH-dependent oxidoreductase that catalyzes the reduction of the nitrile group of 7-cyano-7-deazaguanine (preQ₀) to a primary amine (preQ₁) in the queuosine biosynthetic pathway. Previous work on this enzyme has revealed the mechanism of reaction but the cofactor binding residues remain unknown. The experiments discussed herein aim to elucidate the role of residues lysine 80, …

Practical Wired Digital Communications Link Analysis, Raymond Matthew Schmelzer

Dissertations and Theses

This thesis deals with the analysis of a Wired High Speed Serial Data Link (PAM2) which is commonly used throughout the data-communications and tele-communications industry. The goal of this study is to build a scalable simulation tool using Matlab that ultimately uses Receiver Bit Error Ratio (BER) as the metric for data link health. This study is also designed to aid in link specification development.

The Matlab and theoretical development is broken up into three sections being Transmitter (TX), Channel (Hs) and Receiver (RX). Realistic noise impairments can be added to each section along the signal path creating signal stresses …

Dietary And Physical Activity Acculturation And Weight Status In Chinese College Students, Yanni Zhang

Dissertations and Theses

This cross-sectional study examined the relationships between length of residence in the United States (U.S.) and dietary and physical activity acculturation, and the relationships between dietary and physical activity acculturation and weight status in 55 Chinese college students. Length of residence in the U.S. was positively associated with larger portion size, greater amount of physical activity, and change in BMI in male participants. Adoption of a Western diet was associated with weight gain. Portion size change was positively associated with BMI change. Lunch size change was positively correlated with BMI change in males while negatively correlated with BMI change in …

Understanding Neighborhood Satisfaction For Individuals With Psychiatric Disabilities: A Mixed Methods Study, Amy Leigh Shearer

Dissertations and Theses

Physical and social characteristics of neighborhoods are important to resident satisfaction for clinical and nonclinical populations. This study draws upon data collected from a sample of 172 individuals with psychiatric disabilities living in 16 supportive housing sites in the Portland, Oregon metropolitan area. Research questions explore the extent to which subjective and objective measures of neighborhood physical and social environments contribute to neighborhood satisfaction for this population. Mixed methods were employed to construct a detailed understanding of the factors that influence satisfaction with one's neighborhood of residence. Predictor variables were neighborhood social climate, neighborhood physical quality, perceptions of safety, crime …

Relative Sensitivities Of Dce-Mri Pharmacokinetic Parameters To Arterial Input Function (Aif) Scaling, Xin Li, Yu Cai, Brendan Moloney, Yiyi Chen, Wei Huang, Mark Woods, Fergus V. Coakley, William D. Rooney, Mark G. Garzotto, Charles S. Springer Jr.

Chemistry Faculty Publications and Presentations

Dynamic-Contrast-Enhanced Magnetic Resonance Imaging (DCE-MRI) has been used widely for clinical applications. Pharmacokinetic modeling of DCE-MRI data that extracts quantitative contrast reagent/tissue-specific model parameters is the most investigated method. One of the primary challenges in pharmacokinetic analysis of DCE-MRI data is accurate and reliable measurement of the arterial input function (AIF), which is the driving force behind all pharmacokinetics. Because of effects such as inflow and partial volume averaging, AIF measured from individual arteries sometimes require amplitude scaling for better representation of the blood contrast reagent (CR) concentration time-courses. Empirical approaches like blinded AIF estimation or reference tissue AIF derivation …

Groundwater-Surface Water Interactions Near Mosier, Oregon, Cullen Brandon Jones

Dissertations and Theses

The town of Mosier, Oregon, is located near the east, dry end of the Columbia River Gorge, and the local area is known for cherry orchards that rely heavily on groundwater for irrigation. The CRBG groundwater system in Mosier has experienced groundwater declines of up to 60 meters due to over-pumping and or commingling. Declining groundwater levels have led to concerns over the sustainability of the resource, as it is the principle water source for irrigation and domestic use. Despite numerous previous studies of groundwater flow in CRBG aquifers here and elsewhere in the Columbia River basin, an aspect that …

Generating Technology Development Paths To The Desired Future Through System Dynamics Modeling And Simulation, Hongyi Chen, Jiang Yu, Wayne Wakeland

Complex Systems Faculty Publications and Presentations

Technology foresight is usually conducted by government or industry associations and can serve to provide companies with information on critical technologies that a country or industry intends to develop in the next ten to twenty years. For individual companies to benefit from foresight results and transform them into specific technology development plans, the relationships between the desired technologies and the dynamic business environment need to be understood. In this article, an innovation diffusion model implemented via system dynamics simulation is used to operationalize the link between foresight and planning. It helps company decision makers visualize the diffusion process of the …

Information Literacy In The First Year Of Higher Education: Faculty Expectations And Student Practices, Meredith Esther Michaud

Dissertations and Theses

Information literacy is widely acknowledged as important for student success in higher education. Information literacy is the ability to sort through a large amount of available information, decide what is useful and believable, and apply it in an effective and ethical way. Faculty members have expectations regarding information literacy for students in the first year of college, while students have information literacy practices that may or may not match those expectations. In my study, I examined the alignment of faculty member information literacy expectations and student information literacy practices, focusing on freshman students and faculty members who teach freshman students …

The Intervening Sequence Of Coxiella Burnetii: Characterization And Evolution, Indu Warrier, Mathias C. Walter, Dimitrios Frangoulidis, Rahul Raghavan, Linda D. Hicks, Michael F. Minnick

Biology Faculty Publications and Presentations

The intervening sequence (IVS) of Coxiella burnetii, the agent of Q fever, is a 428-nt selfish genetic element located in helix 45 of the precursor 23S rRNA. The IVS element, in turn, contains an ORF that encodes a hypothetical ribosomal S23 protein (S23p). Although S23p can be synthesized in vitro in the presence of an engineered E. coli promoter and ribosome binding site, results suggest that the protein is not synthesized in vivo. In spite of a high degree of IVS conservation among different strains of C. burnetii, the region immediately upstream of the S23p start codon …

Japanese Dialect Ideology From Meiji To The Present, Nao Okumura

Dissertations and Theses

The intent of this study is to examine the trajectory of ideology regarding standard Japanese and dialects from the historical perspective, and also to discuss the cause of the post-war shift of the ideology. Before the war, the government attempted to disseminate hyojun-go aiming at creating a unified Japan in the time when many countries were developing to be nation states after industrial revolution. After the Pacific war, the less strict-sounding term kyotsu-go was more often used, conveying an ideology of democratization. Yet despite the difference in the terms, speaking a common language continues to play a role of unifying …

Minimizing Corrosion Of Outdoor Metalworks Using Dispersed Chemically Stabilized Nanoclays In Polyvinylidene Fluoride Latex Coatings, Natasja Alexandria Swartz, Capri A. Price, Tami Lasseter Clare

Chemistry Faculty Publications and Presentations

Nanoclays are small enough to appear optically transparent, yet they have large surface-to-volume and high aspect ratios that can significantly inhibit water diffusion when incorporated into protective coatings. Clear coatings, which minimally affect the aesthetics of metalworks, are commonly applied to outdoor metalworks, such as sculptures, to prevent and slow corrosion. In recent years, waterborne clear coatings, rather than solvent-based clear coatings, are increasingly used in many applications to reduce the quantity of volatile organic components in the formulation, yet the performance of dry films produced from waterborne colloidal suspensions is generally poorer. In this work, we aim to improve …

Expanding The Versatility Of Nano Assembled Capsules As Platform Of Potential High Payload Mri Contrast Agents, Annah Farashishiko

Dissertations and Theses

Magnetic resonance imaging (MRI) has become a powerful clinical modality in diagnostic medicine. It is non-invasive and offers high spatial and temporal resolution. The goal of molecular imaging is to reveal the pathophysiology underlying the observed anatomy and diagnose diseases. The detection of pathological biomarkers can lead to early recognition of diseases and improved monitoring for recurrence. Clinically available contrast agents are limited in their discrimination of contrast between tissues and they tend to have very high detection limits. Because biomarkers are very low in concentration there is a need for high payload deposition of contrast agent (CA) and targeted …

The User-Centered Repository: Foundational Conversations And Services, Maija Anderson, Kyle Banerjee, David Forero, Kate Thornhill

Northwest IR User Group

Launching a successful digital repository takes more than selecting the right software and hiring the right staff. How do libraries know that they’re developing repository services that their users want? How do you lobby administration for the funding and staff needed for a new program? How do you ensure a digital initiative's success? OHSU Library’s DAM/IR Task Force share their experiences developing relationships, getting administrative support, and implementing a marketing and communications digital assets management system, which is now in the implementation phase.

From the beginning of this process, the library took the opposite of the "If we build they …

José María Arguedas, Etnógrafo: Campo Cultural Y Mestizaje, Enrique E. Cortez

World Languages and Literatures Faculty Publications and Presentations

En la actualidad, es imposible trazar una historia de la etnología en el Perú sin tomar en cuenta las contribuciones de José María Arguedas. Sin embargo, la antropología de su época atribuyó escasa importancia a su trabajo. El propósito de este artículo es identificar los motivos del reconocimiento tardío y póstumo del aporte de Arguedas. El argumento central es que el concepto de mestizo manejado por la etnografía de Arguedas implicaba una crítica profunda de las prácticas deshistorizantes de la antropología dominante. Interviniendo de manera decisiva en un debate clave en la historia intelectual latinoamericana, Arguedas cuestionó la ideología hispanista …

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 …

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 …

Genomics-Informed Isolation And Characterization Of A Symbiotic Nanoarchaeota System From A Terrestrial Geothermal Environment, Louie Wurch, Richard J. Giannone, Bernard S. Belisle, Carolyn Swift, Sagar Utturkar, Robert L. Hettich, Anna-Louise Reysenbach, Mircea Podar

Biology Faculty Publications and Presentations

Biological features can be inferred, based on genomic data, for many microbial lineages that remain uncultured. However, cultivation is important for characterizing an organism’s physiology and testing its genome-encoded potential. Here we use single-cell genomics to infer cultivation conditions for the isolation of an ectosymbiotic Nanoarchaeota (‘Nanopusillus acidilobi’) and its host (Acidilobus, a crenarchaeote) from a terrestrial geothermal environment. The cells of ‘Nanopusillus’ are among the smallest known cellular organisms (100–300 nm). They appear to have a complete genetic information processing machinery, but lack almost all primary biosynthetic functions as well as respiration and …

Volunteering In Oregon: Strengths And Opportunities In The Nonprofit Sector, Callie H. Lambarth, Lindsey Anne Cochran

Equity & Diversity

The Volunteering in Oregon (VIO) project, conducted in 2016 and commissioned by The Oregon Community Foundation (OCF), sought to explore key questions related to volunteering in Oregon among nonprofits in the state. The VIO project included a statewide electronic survey with a random sample of nonprofit organizations, an electronic survey with a convenience sample of volunteers within these nonprofits, interviews with representatives from nonprofit organizations, and three case studies based on a document review and key stakeholder interviews with representatives of each organization. Ultimately, the aim of the VIO project was to identify recommendations and action steps for how OCF …

Reducing Student Costs: A Report On Textbooks And Course Materials Implementation Status Update As Of June 2016, Reducing Student Costs Implementation Plan

Reducing Student Costs Initiative

This is the implementation plan status update for the Reducing Student Costs: A Report on Textbooks and Course Materials. The plan is divided into two sections: 0-12 completion goals and 12-36 month goals.

Clear Creek Estuary Restoration: Establishing An Ecological Monitoring Program And Baseline Conditions, Christine Butler-Minor

Environmental Science and Management Professional Master's Project Reports

Monitoring habitat conditions in the Clear Creek Estuary before the completion of the Bucklin Hill Bridge Project is a critical part of this ecosystem restoration planning and execution. The Clear Creek Trail Alliance (CCTA) is working with local partners to monitor the effects of the estuary restoration. In a wider effort to characterize salmonid habitat suitability of the estuary prior to the bridge replacement, CCTA would like to gather data related to water quality, beach/bank elevations, vegetation in the vicinity, and invertebrate diversity in the estuary. The development and implementation of this Clear Creek Estuary monitoring project provides an opportunity …

(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 …

Sisters In Action For Power: How Youth-Adult Partnerships And Popular Education Can Facilitate Girl-Led Community Organizing For Equity And Justice, Samantha L. Taylor

PSU McNair Scholars Online Journal

“Sisters in Action for Power: How Youth-adult Partnerships and Popular Education can Facilitate Girl-led Community Organizing for Equity and Justice” examines how grassroots community organizing has impacted women of color in Portland, Oregon. Using a case study of the non-profit organization, Sisters in Action for Power, this paper addresses the question: how do women who were youth organizers with Sisters in Action relate to the broader significance and personal impact of the community organizing work they engaged in as youth? This paper offers three critical aspects of the practice of youth-adult partnerships at Sisters in Action: (1) civic engagement, (2) …

The Other Lives Of Ribosomal Proteins, Metrah M. Nader

PSU McNair Scholars Online Journal

Cellular mRNAs are produced in the nucleus and exported to the cytoplasm through nuclear pore complexes (NPC) that are found in the nuclear membrane. The correctly processed mRNAs are exported in the form of messenger ribonucleoproteins (mRNPs). Since the NPC allows the passage of only one mRNA molecule at a time, export of large ribonucleoproteins (megaRNP) found in the nucleus cannot be transported through the NPC. However, a recent study has discovered an alternative export mechanism known as nuclear envelope budding, which allows megaRNP granules to be exported. This study particularly focuses on identifying ribosomal proteins (RPs) found within large …