Digital Commons Network^™

An Exploration Of Bicyclist Comfort Levels Utilizing Crowdsourced Data, Bryan Philip Blanc

Dissertations and Theses

Bicycle transportation has become a central priority of urban areas invested in improving sustainability, livability, and public health outcomes. Transportation agencies are striving to increase the comfort of their bicycle networks to improve the experience of existing cyclists and to attract new cyclists. The Oregon Department of Transportation sponsored the development of ORcycle, a smartphone application designed to collect cyclist travel, comfort, and safety information throughout Oregon. The sample resulting from the initial deployment of the application between November 2014 and March 2015 is described and analyzed within this thesis. 616 bicycle trips from 148 unique users were geo-matched to …

Language Policy And Bilingual Education For Immigrant Students At Public Schools In Japan, Naomi Asakura

Dissertations and Theses

This thesis discusses the current Japanese language (nihongo) education for immigrant students at public schools in Japan and provides recommendations through the study of language policy and the comparison of bilingual education in the United States. The current situation of a decreasing birth rate and increasing aging population in Japan has led to the acceptance of more foreign workers. Due to this change, language education in Japan has increasing development. The focus of chapter 1 is on the theories of language policy. This paper particularly focuses on the ideas of Wright (2004), Neustupný (2006), Spolsky (2004), and Cooper (1989), and …

Antimalarial Drug Discovery Using Triazoles To Overcome Chloroquine Resistance, Elias Sibhatu Tesfaselassie

Dissertations and Theses

Malaria is considered as one of the most prevalent and debilitating diseases affecting humans. Plasmodium falciparum is the most virulent form of the parasite which developed resistance to several antimalarial drugs. Chloroquine is one of the most successful antimalarials developed that is safe, effective, and cheap. However, its use has been limited due to the emergence of drug resistance. Click chemistry, particularly, the copper(I)-catalyzed reaction between azides and alkynes has shown to have a cutting-edge advantage in medicinal chemistry by its reliability, selectivity and biocompatibility.

Triazole-based antimalarials were synthesized via copper(I)-catalyzed alkyne-azide cycloaddition reaction by modifying the aliphatic chains terminal …

The Role Of Pyrococcus Furiosus Transcription Factor E In Transcription Iniitiation, Robyn Lynn Eustis

Dissertations and Theses

All sequenced archaeal genomes encode a general transcription factor, TFE, which is highly conserved and homologous to the alpha subunit of the eukaryotic transcription factor TFIIE. TFE functions to increase promoter opening efficiency during transcription initiation, although the mechanism for this is unclear. The N-terminus of TFE contains a common DNA binding motif, a winged helix. At the tip of this winged helix is a highly conserved region of aromatic amino acids that is close to DNA during initiation. TFE activation can compensate for mutations in another transcription factor, TFB2, which is homologous to TFIIB. P. furiosus encodes two paralogs …

Developmental Mechanisms That Support Genome Stability And Embryonic Survival In Stress-Tolerant Embryos Of The Annual Killifish Austrofundulus Limnaeus, Josiah Tad Wagner

Dissertations and Theses

In order to complete their life cycles, vertebrates require oxygen and water. However, environments are not always forgiving when it comes to constantly providing these basic needs for vertebrate life. The annual killifish Austrofundulus limnaeus is possibly the most well described extremophile vertebrate and its embryos have been shown to tolerate extremes in oxygen, salinity, and water availability. This phenotype is likely a result of the annual killifish life history, which includes periods of temporary habitat desiccation and oxygen deprivation, and requires the production of stress-tolerant embryos that depress metabolism in a state of suspended animation, known as diapause. Over …

Centralia, Collective Memory, And The Tragedy Of 1919, Shawn T. Daley

Dissertations and Theses

The Centralia Tragedy of 1919 has been represented in numerous works over the course of the past 100 years. The vast majority of them concern the events of the day of the Tragedy, November 11, 1919, and whether a small group of Wobblies – members of a union group known as the International Workers of the World (I.W.W.) – opened fire on a group of parading American Legionnaires. This particular element, whether or not the Wobblies opened fire on the Legionnaires or the Legionnaires actually charged the hall where the Wobblies were staying, has generated significant concern in academic and …

Neurobiology Of Seasonal Life-History Transitions, Ashley Rae Lucas

Dissertations and Theses

Many animals exhibit seasonal changes in life-history stages, and these seasonal transitions are often accompanied by dramatic switches in behavior. While the neuroendocrine mechanisms that regulate such behavioral transitions are poorly understood, arginine vasotocin (AVT) and neuropeptide Y (NPY) are excellent candidates because they regulate reproductive and feeding behavior, respectively. In this study, I asked if seasonal changes in AVT and/or NPY are concomitant with spring migration away from the breeding grounds, as male and female red-sided garter snakes (Thamnophis sirtalis parietalis) are transitioning from reproductive to non-reproductive behavior during this time. To address this question, I collected …

A Town On Fire: The Copperfield Affair Of 1914, Daniel Joseph Shepard

Dissertations and Theses

In 1914, Copperfield, Oregon was militarily occupied by order of the governor, Oswald West. Its town government was deposed, the city officials were arrested, and the town's saloons were closed and all liquor and gambling devices were seized. The town, previous to Governor West's interdiction, had seen a breakdown into violence and arson between two competing saloon cliques. The resulting martial law of Copperfield and subsequent court battles between the governor and Copperfield's saloonkeepers would become known as the Copperfield Affair.

The purpose of this study is to explain how and why the Copperfield Affair happened. The event which precipitated …

Inspiring Action: Measuring The Effect Of Motivational Frames On Social Movement Mobilization, Rebecca Louise Smith

Dissertations and Theses

In order to probe how social movement messages foster participant mobilization, this study utilized an experimental design to investigate collective action frames, core messaging tasks that define problems, assign blame, convey a plan of action, and inspire participation. The study compared the effects of climate change messages that contain motivational frames with those that do not, incorporating the influence of resonance, and exposure to competing and counter frames. Results revealed that motivational frames contributed to mobilization, especially intention to act, under conditions of resonance and with exposure to counter frames. Salience primed participants to respond to motivational frames, however for …

Supervisor-Specific Outcomes Of A Work-Family Intervention: Evidence From The Work, Family, & Health Study, Mackenna Laine Perry

Dissertations and Theses

Workplace interventions provide a practical and important means of providing support for employees' work-family needs. However, work-family interventions are rare and are generally not thoroughly evaluated. The current study seeks to better understand the impacts of STAR ("Support. Transform. Achieve. Results."), the large-scale work-family intervention developed and implemented by the Work, Family, & Health Network (see Bray et al., 2013). Drawing on Conservation of Resources theory (Hobfoll, 1989), this study examines supervisors' participation in STAR through assessment of three primary supervisor-specific outcomes: training-related views and behaviors, well-being, and the work-family interface. The sample, consisting of 184 supervisors from 30 extended-care …

Perspectives On The College Readiness And Outcome Achievement Of Former Intensive English Language Program (Ielp) Students, Meghan Oswalt

Dissertations and Theses

Program evaluation (PE) is important for ESL programs but also difficult. As the scope of PE has grown, student voices have increasingly been included. Alumni provide unique perspectives, but Portland State University's (PSU) Intensive English Language Program (IELP) currently has no exit survey. Furthermore, little research uses alumni data, so this constructivist, mixed-methods study used data triangulation to compare the perceptions of former IELP students with those of three other stakeholder groups -- the topic: IELP student preparedness for PSU. Both online surveys and interviews were conducted, and participants included 63 former and 33 current IELP students, 27 IELP faculty …

Hydrogeologic Investigation Of A Pumice Aquifer, Fremont/Winema National Forest, Oregon, Jonathan Michael Weatherford

Dissertations and Theses

The middle Holocene cataclysmic eruption of Mount Mazama blanketed Walker Rim, in south central Oregon, with 270 cm to 300 cm of pumice, causing capture of surface water systems by groundwater, stream relocation, and the formation of biologically diverse fens and seasonal wetlands. The pumice aquifer at Round Meadow, an 8.6 km² basin, hosts both a fen and seasonally ponded wetlands. The Round Meadow watershed lies within a closed basin between the upper Klamath and Deschutes river basins. As the highest meadow at Walker Rim, it is a relatively well-constrained system to study the effects of hydrological disruption.

A …

Training "In A Good Way": Evaluating The Effect Of A Culturally Responsive Pre-Training Intervention On Learning And Motivation, Adam Thomas Murry

Dissertations and Theses

Employee Training and Development (T&D) is a crucial component to an organization’s success and its ability to remain competitive. Although researchers in the field have discovered ways to enhance the effectiveness of training programs through the design, delivery, and evaluation process, research has not provided empirically-based recommendations for how to best train individuals whose cultural backgrounds may influence receptiveness of training curriculum. This is particularly relevant for employees whose cultural groups have been historically discriminated against, where cultural norms implicit in the training design may be met with resistance on behalf of the trainees. In the field of multicultural education, …

The Forgotten Front: Gender, Labor, And Politics In Camas, Washington, And The Northwest Paper Industry, 1913-1918, Bradley Dale Richardson

Dissertations and Theses

Southwest Washington labor history has received little examination by scholars. Focusing mainly on Seattle, Everett, Centralia, and Spokane, historians view Southwest Washington, a traditionally conservative community, to be of little importance in the state's overall historical narrative. This thesis corrects that assumption and the omission of Southwest Washington. The failure of the unionization effort in Camas impacted organization in Pacific Northwest paper mills for nearly a decade. Although workers failed to sustain their union, the events in Camas between 1913 and 1918 present an excellent new laboratory and case study to explore the intersection of gender, labor, and politics. Despite …

Upper Body Posture And Pain In Division I Female Volleyball And Softball Athletes, Brittany M. Plunkett Castilla

Dissertations and Theses

Participation in athletics is a popular pastime and form of entertainment. Children often begin to specialize in one sport at a young age in an effort to excel, which increases physical stress and the potential for injuries. Athletes participating in overhead sports are at increased risk of upper body chronic injuries, in part because the shoulder is an unstable hypermobile joint. Posture may also be affected in these athletes because of the demands placed on the upper body. The purpose of this study was to measure the upper body posture in a sample of Division I collegiate volleyball and softball …

Expressionist Art And Drama Before, During, And After The Weimar Republic, Shane Michael Kennedy

Dissertations and Theses

Expressionism was the major literary and art form in Germany beginning in the early 20th century. It flourished before and during World War I and continued to be the dominant art for of the Early Weimar Republic. By 1924, Neue Sachlichkeit replaced Expressionism as the dominant art form in Germany. Many Expressionists claimed they were never truly apart of Expressionism. However, in the periodization and canonization many of these young artists are labeled as Expressionist.

This thesis examines the periodization and canonization of Expression in art, drama, and film and proves that Expressionism began much earlier than scholars believe and …

Assessing The Impact Of Restrictiveness And Placement Type On Transition-Related Outcomes For Youth With And Without Disabilities Aging Out Of Foster Care, Jessica Danielle Schmidt

Dissertations and Theses

Nearly 23,000 youth age out of the foster care system between the ages of 18 and 21 each year in a transition fraught with challenges and barriers. These young people often lack developmentally appropriate experiences and exposure to necessary knowledge, role modeling, skill building, and long-term social support to promote positive transitions to adulthood while in foster care. As a result, young people who exit care face an array of poor adult outcomes. Nearly 60% of transition-aged foster youth experience a disability, and as such, face compounded challenges exiting foster care. While the examination of young adult outcomes for youth …

A Queer Liberation Movement? A Qualitative Content Analysis Of Queer Liberation Organizations, Investigating Whether They Are Building A Separate Social Movement, Joseph Nicholas Defilippis

Dissertations and Theses

In the last forty years, U.S. national and statewide LGBT organizations, in pursuit of "equality" through a limited and focused agenda, have made remarkably swift progress moving that agenda forward. However, their agenda has been frequently criticized as prioritizing the interests of White, middle-class gay men and lesbians and ignoring the needs of other LGBT people. In their shadows have emerged numerous grassroots organizations led by queer people of color, transgender people, and low-income LGBT people. These "queer liberation" groups have often been viewed as the left wing of the GRM, but have not been extensively studied. My research investigated …

School Reform And Coaching: Identifying Structures For Successful Implementation Of A Data Informed Decision-Making Program, Kristan D. Parman

Dissertations and Theses

During the past 50 years, the landscape of education shifted from a rank order model to a system where all students are expected to achieve at a minimum level. This led to reforms in the way schools operate and teachers teach. One change to teaching is the use of data to inform instructional practices and student groupings. The need for teachers to increase their data use and change their instruction has prompted the need for professional development practices to be more effective. Coaching has been shown to be an effective professional development strategy to help teachers transfer new skills into …

Investigation In To The Effect Of Spin Locking On Contrast Agent Relaxivity, Julian Saunders Haigh

Dissertations and Theses

The current trend in magnetic resonance imaging (MRI) is towards higher external magnetic field strengths (B₀) to take advantage of increased sensitivity and signal to noise ratio (SNR). Unfortunately, as (B₀) increases the effectiveness (relaxivity) of clinical gadolinium (Gd³⁺⁾-based contrast agents (CAs) administered to enhance image contrast is significantly reduced. Excellent soft tissue contrast can be generated with current agents despite their non-optimum relaxivities but necessitates large doses. The limits of detection of a CA at high B₀ fields can be lowered by recovering the lost relaxivity and is a pre-requisite to the …

Caring For The Land, Serving People: Creating A Multicultural Forest Service In The Civil Rights Era, Donna Lynn Sinclair

Dissertations and Theses

This qualitative study of representative bureaucracy examines the extension and limitations of liberal democratic rights by connecting environmental and social history with policy, individual decision making, gender, race, and class in American history. It documents major cultural shifts in a homogeneous patriarchal organization, constraints, advancement, and the historical agency of women and minorities. "Creating a Multicultural Forest Service" identifies a relationship between natural and human resources and tells a story of expanding and contracting civil liberties that shifted over time from women and people of color to include the differently-abled and LGBT communities. It includes oral history as a key …

Photoluminescent Silicon Nanoparticles: Fluorescent Cellular Imaging Applications And Photoluminescence (Pl) Behavior Study, Sheng-Kuei Chiu

Dissertations and Theses

Molecular fluorophores and semiconductor quantum dots (QDs) have been used as cellular imaging agents for biomedical research, but each class has challenges associated with their use, including poor photostability or toxicity. Silicon is a semiconductor material that is inexpensive and relatively environmental benign in comparison to heavy metal-containing quantum dots. Thus, red-emitting silicon nanoparticles (Si NPs) are desirable to prepare for cellular imaging application to be used in place of more toxic QDs. However, Si NPs currently suffer poorly understood photoinstability, and furthermore, the origin of the PL remains under debate.

This dissertation first describes the use of diatomaceous earth …

Rational Design Of Materials For The Protection Of Outdoor Metalworks, Natasja Alexandria Swartz

Dissertations and Theses

Protective coatings are commonly used to protect culturally significant works, such as outdoor sculptures and architectural elements. Given the valuable nature of such metalworks, there is a surprising lack of environmentally sustainable coatings available for their conservation. High performance clear coatings are not developed or thoroughly tested for compatibility and longevity on outdoor sculptures. This can make the implementation of both methods and materials, no matter how promising in a lab, a significant hurdle for the conservation science community. This dissertation work initially aims to replace high-VOC formulations such as acrylic lacquers and waxes currently used as protective coatings for …

Mistrust: An Exploration Of African Americans' Attitudes And Perspectives Toward Healthcare, Adolfo Gabriel Cuevas

Dissertations and Theses

This dissertation explored mistrust through focus group discussions (study 1), responses to standardized laboratory vignettes (study 2), and survey questionnaires (study 3). In the first study, I found that African American community members (N=60) experienced perceived discrimination, medical mistrust, and poor communication in numerous and interrelated ways. For example, medical mistrust occurred when clinicians did not convey respect to patients, leaving patients to wonder whether their clinician's treatment was discriminatory or not. Based on these findings, I wanted to see whether these experiences of perceived discrimination and mistrust were related to other dimensions of Black experience, such as racial identity. …

Evaluation Of Data-Path Topologies For Self-Timed Conditional Statements, Navaneeth Prasannakumar Jamadagni

Dissertations and Theses

This research presents a methodology to evaluate data path topologies that implement a conditional statement for an average-case performance that is better than the worst-case performance. A conditional statement executes one of many alternatives depending on how Boolean conditions evaluate to true or false. Alternatives with simple computations take less time to execute. The self-timed designs can exploit the faster executing alternatives and provide an average-case behavior, where the average depends on the frequency of simple and complex computations, and the difference in the completion times of simple and complex computations. The frequency of simple and complex computations depends on …

The Design And Validation Of A Group Theory Concept Inventory, Kathleen Mary Melhuish

Dissertations and Theses

Within undergraduate mathematics education, there are few validated instruments designed for large-scale usage. The Group Concept Inventory (GCI) was created as an instrument to evaluate student conceptions related to introductory group theory topics. The inventory was created in three phases: domain analysis, question creation, and field-testing. The domain analysis phase included using an expert consensus protocol to arrive at the topics to be assessed, analyzing curriculum, and reviewing literature. From this analysis, items were created, evaluated, and field-tested. First, 383 students answered open-ended versions of the question set. The questions were converted to multiple-choice format from these responses and disseminated …

Tweakable Ciphers: Constructions And Applications, Robert Seth Terashima

Dissertations and Theses

Tweakable ciphers are a building block used to construct a variety of cryptographic algorithms. Typically, one proves (via a reduction) that a tweakable-cipher-based algorithm is about as secure as the underlying tweakable cipher. Hence improving the security or performance of tweakable ciphers immediately provides corresponding benefits to the wide array of cryptographic algorithms that employ them. We introduce new tweakable ciphers, some of which have better security and others of which have better performance than previous designs. Moreover, we demonstrate that tweakable ciphers can be used directly (as opposed to as a building block) to provide authenticated encryption with associated …

Network Structure, Network Flows And The Phenomenon Of Influence In Online Social Networks: An Exploratory Empirical Study Of Twitter Conversations About Youtube Product Categories, Nitin Venkat Mayande

Dissertations and Theses

Traditional marketing models are swiftly being upended by the advent of online social networks. Yet, practicing firms that are engaging with online social networks neither have a reliable theory nor sufficient practical experience to make sense of the phenomenon. Extant theory in particular is based on observations of the real world, and may thus not apply to online social networks. Practicing firms may consequently be misallocating a large amount of resources, simply because they do not know how the online social networks with which they interact are organized.

The purpose of this dissertation is to investigate how online social networks …

The Influence Of Surface Chemistry On The Photoelectrochemical Properties Of Fes(2) Photoanodes, Qi Tong

Dissertations and Theses

The recurring theme of this dissertation is the correlation between FeS₂ surface chemistry and key electrical and electronic properties of FeS₂. Efforts have been made to identify and characterize the FeS₂ surface, investigate the photoelectrochemistry of FeS₂ photoanodes under anhydrous and anoxic conditions, and investigate the influence of deliberate surface chemistry on FeS₂ photoelectrochemistry.

Infrared reflection-absorption spectroscopy (IRRAS) was used to investigate a thin adsorbate layer on pyrite. The results showed that the combination of angle-dependent studies and computational efforts are a powerful tool for characterizing the pyrite surface.

The photoelectrochemistry of FeS_{2 …}

Glacier Change On The Three Sisters Volcanoes, Oregon: 1900-2010, Justin George Ohlschlager

Dissertations and Theses

A glacier responds to changes in climate by subsequent retreat and advance as a result of changes in snow inputs and outputs. Understanding these changes is important because shrinking glaciers limit and diminish local water resources. They contribute to alpine runoff in the late-summer months by delaying the maximum runoff until late in the melt season. A comprehensive glacier and perennial snowfield inventory has not been completed for the Three Sisters in Central Oregon. Using aerial photography, Digital Elevation Models (DEMs), previous studies, and historical ground based photographs these glacier and perennial snowfields were defined and their surface area change …