Digital Commons Network^™

Testing The Correlation Of Trace Element Characteristics With The Petrology And Temperature Of Eruption Of Mid-Miocene Rhyolites In Eastern Oregon, Brianna Christine Young

Dissertations and Theses

The Lake Owyhee Volcanic Field (LOVF) in eastern Oregon experienced several major eruptive events during the mid-Miocene (16.8 to 15.5 Ma), resulting in the emplacement of 3,900 km³ of rhyolitic lava flows and ash-flow tuffs. Eighteen samples from eleven different silicic centers in the LOVF were selected for this study. While all samples of this study are classified as rhyolite, their compositions vary greatly in terms of trace and major elements. Using trace elements, these rhyolite samples are classified as "A-type", described as resulting from "hot and dry" magmas and associated with hot-spot activity, or as "I-type" or "calc-alkaline", …

Dynamic Effects Of Inertial Particles On The Wake Recovery Of A Model Wind Turbine, Sarah E. Smith

Dissertations and Theses

Impacting particles such as rain, dust, and other debris can have devastating structural effects on wind turbines, but little is known about the interaction of such debris within turbine wakes. This study aims to characterize behavior of inertial particles within the turbulent wake of a wind turbine and relative effects on wake recovery. Here a model wind turbine is subjected to varied two-phase inflow conditions, with wind as the carrier fluid (Re_λ = 49 - 88) and polydisperse water droplets (26 to 45µm in diameter) at varied concentrations (Φ_v=0.24 x 10^-5 - 1.3 …

The Rocky Ledge Fault, Shasta County, Ne California: Development And Morphology Of A Quaternary Oblique Normal Fault In Basalt, Gregory David Linscott Martin

Dissertations and Theses

Distinct morphology, variable vertical separation, and unique structural geometries are observed along the Rocky Ledge fault (RLF), an east-dipping, oblique normal fault in the tectonically complex Hat Creek Graben, Shasta County, NE California. Situated in the southern Cascade arc, the RLF is located at the boundary of the Klamath Mountains, Basin and Range, and Walker Lane Seismic Belt. The primary goal of this project is to better understand Quaternary deformation along the RLF. I developed detailed maps of geologic units and structures along the ~15 km length of the RLF. Map data informs assessment of fault geometry, scarp morphology, and …

Crime Risk Near Reported Homeless Encampments: A Spatial Analysis, Kortney Lynn Russell

Dissertations and Theses

Those experiencing homelessness face several challenges in contemporary society including a higher risk of victimization compared to the general population. In order to offer effective intervention to protect members of this population, understanding the spatial relationship between homeless camps and crime is imperative. To provide the foundation for a future risk assessment used to identify camps with a higher risk of nearby victimization, this study assessed crime concentration in relation to reported homeless camps in Portland, Oregon. Utilizing two publicly available data sources, this study conducted spatial analyses on voluntarily reported homeless camp data from October through December 2019 and …

Exploring Policies And Strategies For The Diffusion Of Remote Patient Monitoring (Rpm) For The Care Of Senior Population, Hamad Asri Alanazi

Dissertations and Theses

Telemedicine offers great promise in addressing some of the healthcare challenges such as the increase of healthcare expenditure, a growing population, and a projected physician shortage; telemedicine is increasingly being included in the discussion of medicine's future. Telemedicine offers the capabilities to deliver healthcare across distances at reduced costs while maintaining or even increasing the quality of treatment and services.

The objective of this research is to develop a model to evaluate alternative solutions to increase the adoption of RPM for the senior population. Also, the research provides a systematic approach for a comprehensive assessment of teleconsultation adoption, develop a …

Biogeography, Morphology, And Systematics Of The Mountain Cottontail, Sylvilagus Nuttallii (Bachman, 1837), Mammalia: Lagomorpha: Leporidae, Johnnie H. French

Dissertations and Theses

Widespread species often present taxonomic conundrums: are they truly a single panmictic species, or, is the widespread species in fact a polytypic species complex constituted by independently evolving, morphologically or otherwise cryptic species? One such broadly distributed taxon is Sylvilagus nuttallii, with distribution across the western United States, ranging from South Dakota to California, and from Canada to Arizona. The three subspecies constituting S. nuttallii are, however, geographically isolated and it has been hypothesized that they likely constitute independent, species level taxa. However, that study examined only two of the three holotypes, rather than broader geographic and non-geographic variation. …

Recurrent Formation, Low Levels Of Ecological Differentiation, And Secondary Dispersal Facilitate The Establishment And Persistence Of Autopolyploids In Eriophyllum Lanatum, Nicolas Alexander Diaz

Dissertations and Theses

The high rates of polyploidization events in angiosperms is a well-documented driver of diversification and speciation. The consequences of polyploidy--from gene expression up to ecology--and the processes facilitating the persistence of polyploidy in its early establishment in populations are poorly understood. In this thesis, I examined the role of recurrent formation, ecological differentiation, and secondary dispersal via biotic vectors in the maintenance and persistence of an intervarietal polyploid contact zone of Eriophyllum lanatum in Southern Oregon. Sampling 35 total populations, I used a whole chloroplast capture and flow cytometry to determine the diversity and distribution of chloroplast haplotypes and estimate …

Perceptions Of Police Use Of Force At The Intersection Of Race And Pregnancy, Emma Elizabeth Lee Money

Dissertations and Theses

Attention surrounding forceful policing largely focuses on men's experiences, but Black women, even when pregnant, are also harmed by police use of force. Previous research demonstrating anti-Black biases in perceptions of police use of force toward men cannot be directly applied towards women, due to unique stereotypes of Black women and mothers. How do race and pregnancy influence perceptions of police use of force against women? It was expected that pregnancy would elicit more positive responses in the current study, but only when pregnant women were also White. Benevolent sexism (BS) and social dominance orientation (SDO) were tested as moderators …

Time Series Analysis Evaluating Mortality Rates And The Differences Of How States Investigate Deaths, Jordan M. Bruhn

Dissertations and Theses

Mortality statistics are essential to both public health and criminal justice systems. The causes of death that are determined by death investigators influence whether a criminal investigation is opened or not. Prior research suggests a high degree of variability for death investigator requirements across states, which may attribute to inaccurate death reporting. This research provides a 20-year evaluation of the differences in state death investigation laws and their impacts on rates of mortality. This study examines the variation in mortality rates by answering if there is a difference in mortality rates for states requiring medical examiners and states requiring coroners …

Droplet Ejections During Wet Lab Operations Aboard Spacecraft, Caleb Cushman Turner

Dissertations and Theses

The breakup and rupture of liquid bridges, thin films, bubbles, droplets, rivulets, and jets can produce satellite droplets that are subsequently ejected into their surrounding environment. For example, when any solid object is withdrawn from a liquid bath, the formation of an ever-thinning columnar liquid bridge eventually ruptures along the axis of the bridge. When rupture occurs under typical pipetting conditions the dynamics governing the rupture almost always produce at a minimum a satellite droplet. When these droplets occur they are often too small and too fast to be observed by the human eye. In a terrestrial environment they are …

Detecting Reinforcement Patterns In The Stream Of Naturalistic Observations Of Social Interactions, James Lamar Delaney 3rd

Dissertations and Theses

How do consequences affect future behaviors in real-world social interactions? The term positive reinforcer refers to those consequences that are associated with an increase in probability of an antecedent behavior (Skinner, 1938). To explore whether reinforcement occurs under naturally occuring conditions, many studies use sequential analysis methods to detect contingency patterns (see Quera & Bakeman, 1998). This study argues that these methods do not look at behavior change following putative reinforcers, and thus, are not sufficient for declaring reinforcement effects arising in naturally occuring interactions, according to the Skinner's (1938) operational definition of reinforcers.

This study presents the conceptual and …

The Persistence Of Indigenous Markets In Mexico's 'Supermarket Revolution', Diana Christina Denham

Dissertations and Theses

This dissertation research investigates the paradoxical survival of Indigenous markets in the context of state-sponsored development strategies that privilege multinational retailers and rebrand Mexican cities as modern and globally competitive. I examine how Indigenous markets have survived the supermarketization (and, more precisely, Walmartization) of food retail that has taken hold in Mexico. Better known by their Nahuatl name tianguis, open-air Indigenous markets held in streets and public plazas predate the arrival of the first conquistadors and remain common across Mesoamerica today. My examination of tianguis in native language texts, colonial narratives, popular art, and mid-20th century newspapers demonstrates that …

Evaluating R&D Projects In Regulated Utilities: The Case Of Power Transmission Utilities, Edwin Garces

Dissertations and Theses

R&D project selection is essential for many organizations; however, it is a complex decision since it is affected by many factors. These factors vary among organizations because of their different objectives and conditions. There are limited budgets for the investments, and the current R&D project selection methods are focused on financial analysis or complex mathematical probabilistic calculations. Therefore, the main motivation of this research is to create a method to help improve the ex-ante selection of R&D projects in regulated organizations. More importantly, the case application is the electric transmission utilities sector, which plays one of the most critical roles …

Memristive Architectures And Algorithms For Approximate Graph-Based Inference, Mohammad M.A. Taha

Dissertations and Theses

The goal of this thesis is to design fast, low-power, robust graph-based inference systems. Our approach to this is by using (1) in-memory computing, (2) approximate computing principles, and (3) memristive devices.

This work is motivated by the fact that conventional von Neumann architectures are not efficient for inference applications, mainly due to the data transfer bottleneck. Adding cache memories and using GPUs is a remedy, however, does not eliminate this bottleneck. In-memory computing is an alternative approach that performs all computations inside the memory, thus eliminating the data transfer bottleneck.

The memristor, which is a passive two-terminal device, is …

A Market Diffusion Potential (Mdp) Assessment Model For Residential Energy Efficient (Ee) Technologies In The U.S., Momtaj Khanam

Dissertations and Theses

The Diffusion of Residential Energy Efficient (EE) Technologies has been studied for many years. Finding ways to bridge the energy efficiency gap and increase the diffusion of these technologies have been of much interest to researchers and practitioners alike. However, in most studies, diffusion is equated to adoption of EE technologies by consumers. The present study tries to break this mindset and develops a model to assess the diffusion of residential EE technologies from the market's perspective. The model assesses diffusion of an EE technology based on the market's ability to provide benefits to customers that are identified to be …

Spatial Statistical Approaches To Water Quality Modelling, Janardan Mainali

Dissertations and Theses

This dissertation aims to advance the existing knowledge related to spatial modeling of water quality by exploring and introducing innovative approaches to different spatial conceptualizations for water quality modeling and incorporating upstream-downstream relations in geographically weighted regression. By carrying out a systematic literature review of four different classes of spatial models in Chapter One, this dissertation identifies the following major research gaps: lack of incorporation of multiscale processes, not enough emphasis on spatial weights matrices, and unavailability of upstream-downstream relationships in geographically weighted regressions. Chapters Two and Three were designed to address these gaps in the literature. In Chapter Two, …

“Decolonize” E-Literature? On Weeding The E-Lit Garden, Kathi Inman Berens

English Faculty Publications and Presentations

Berens asks: Should the e-literature community include third-generation works in collections, syllabi, databases, prizes? A related question: do third-gen makers have a role in “decolonizing” e-literature? Who or what “colonizes” e-lit? E-literature, like earlier avant gardes, began as a coterie and has become a scholarly field. Using the comparison of a field versus a walled garden, the essay examines critiques of e-literature and variations on field definitions. It ends with two ideas about how to "decolonize" e-literature; about how equity and inclusion work in tandem with decolonization, but are not the same thing; and why decolonization efforts are urgent in …

Teachers’ Perspectives On Year Two Implementation Of A Kindergarten Readiness Assessment, Rachel E. Schachter, Erin E. Flynn, Amy R. Napoli, Shayne B. Piasta

School of Social Work Faculty Publications and Presentations

In this study we examined teachers’ perspectives regarding the second year of implementing a Kindergarten Readiness Assessment (KRA). Using a mixed-methods approach, we focused on the administration process, the perceived benefits of the assessment, and how teachers used the assessment to inform instruction. We also investigated whether these differed by teacher and district characteristics and how KRA experiences were different in the second year of implementation. Research Findings: Teachers generally did not view the KRA as beneficial for instruction or for students, reporting administration difficulties, inadequate KRA content, and limited utility of KRA data for supporting instruction as ongoing …

Ultrasonic Coda Wave Comparison For Quality Control Of Manufactured Parts: Proof Of Feasibility, Alexei Marin-Cortes

Civil and Environmental Engineering Master's Project Reports

Manufactured parts are a staple of modern urban life, visible in homes (e.g., kitchen appliances), offices (e.g., printers), the automobile and aerospace industries (e.g., body parts), and more. This M.S. project intended to determine whether ultrasonic testing could be used in a simple and rapid manner to perform quality control of manufactured parts. Ultrasonic testing is employed for this purpose using two surface-coupled transducers, one being a transmitter and the other one a receiver. An ultrasonic pulse, which is generated by the transmitting transducer, propagates through the part, collecting information about material and geometry, as well as potential unwanted features. …

Using Spoken Dialogue Technology For L2 Speaking Practice: What Do Teachers Think?, Veronika Timpe-Laughlin, Tetyana Sydorenko, Phoebe Daurio

Applied Linguistics Faculty Publications and Presentations

Often, second/foreign (L2) language learners receive little opportunity to interact orally in the target language. Interactive, conversation-based spoken dialog systems (SDSs) that use automated speech recognition and natural language processing have the potential to address this need by engaging learners in meaningful, goal-oriented speaking practice. However, these technology-based learning tools are often developed without input from teaching professionals. As part of a larger development effort, this study examined English as a second language (ESL) teachers’ perceptions regarding SDS-based speaking tasks, addressing the following research questions: (a) What do teachers think about the SDS-based tasks? (b) How would they use them …

Sound Discrimination And Explicit Mapping Of Sounds To Meanings In Preschoolers With And Without Developmental Language Disorder, Carolyn Quam, Holly Cardinal, Celeste Gallegos, Todd Bodner

Speech and Hearing Sciences Faculty Publications and Presentations

Purpose: To investigate links between sound discrimination and explicit sound-meaning mapping by preschoolers with and without developmental language disorder (DLD).

Method: We tested 26 children with DLD and 26 age- and gender-matched peers with typical language development (TLD). Inclusion was determined via results of standardised assessments of language and cognitive skills and a hearing screening. Children completed two computerised tasks designed to assess pitch and duration discrimination and explicit mapping of pitch- and duration-contrasting sounds to objects.

Result: Children with TLD more successfully mapped pitch categories to meanings than children with DLD. Children with TLD also showed significantly better overall …

Investigation Of Evidence For The Internal Structure Of A Modified Science Motivation Questionnaire Ii (Msmq Ii): A Failed Attempt To Improve Instrument Functioning Across Course, Subject, And Wording Variants, Regis Komperda, Kathryn Hosbein, Michael M. Phillips, Jack Barbera

Chemistry Faculty Publications and Presentations

The Science Motivation Questionnaire II (SMQ II) was developed to measure aspects of student motivation in college-level science courses. Items on the SMQ II are structured such that the word ‘science’ can be replaced with any discipline title (e.g., chemistry) to produce a discipline-specific measure of student motivation. Since its original development as the Science Motivation Questionnaire and subsequent refinement, the SMQ II and its discipline-specific variants have been used in a number of science education studies. However, many studies have failed to produce acceptable validity evidence for their data based on the proposed internal structure of the …

Among Low-Income Women In San Francisco, Low Awareness Of Paid Parental Leave Benefits Inhibits Take-Up, Julia M. Goodman, Holly Elser, William H. Dow

OHSU-PSU School of Public Health Faculty Publications and Presentations

Paid family leave policies have the potential to reduce health disparities, yet access to paid leave remains limited and unevenly distributed in the United States. Using California administrative claims data, we examined the impact of the San Francisco Paid Parental Leave Ordinance, the first in the US to provide parental leave with full pay. We found that the law increased parental leave uptake in San Francisco by 13 percent among fathers, but there was little change in leave among mothers. Data from a survey of mothers suggest that the limited impact may be partly a result of low understanding of …

The Meaning Of Red And Green In User Interfaces For The Color Deficient, Bassel Hamieh

University Honors Theses

Around 108 million web users are color blind which is a problem when the way we communicate over the web or interfaces is through the use of color. Red and green are two colors that are especially heavily used in interface design because of their strong symbolic associations; red being a sign to warn or stop and green being the opposite. This has a large effect on red-green color blind people who are not able to perceive either of those colors correctly. Many solutions exist that aim to help through color differentiation but none take into account color symbolism. With …

Empirical Analysis Of Cbow And Skip Gram Nlp Models, Tejas Menon

University Honors Theses

CBOW and Skip Gram are two NLP techniques to produce word embedding models that are accurate and performant. They were invented in the seminal paper by T. Mikolov et al. and have since observed optimizations such as negative sampling and subsampling. This paper implements a fully-optimized version of these models using Py-Torch and runs them through a toy sentiment/subject analysis. It is weakly observed that different corpus types affect the skew of word embeddings such that fictional corpus are better suited for sentiment analysis and non-fictional for subject analysis.

Automatic Keyphrase Extraction From Russian-Language Scholarly Papers In Computational Linguistics, Yves Wienecke

University Honors Theses

The automatic extraction of keyphrases from scholarly papers is a necessary step for many Natural Language Processing (NLP) tasks, including text retrieval, machine translation, and text summarization. However, due to the different grammatical and semantic intricacies of languages, this is a highly language-dependent task. Many free and open source implementations of state-of-the-art keyphrase extraction techniques exist, but they are not adapted for processing Russian text. Furthermore, the multi-linguistic character of scholarly papers in the field of Russian computational linguistics and NLP introduces additional complexity to keyphrase extraction. This paper describes a free and open source program as a proof of …

Functional Programming For Systems Software: Implementing Baremetal Programs In Habit, Donovan Ellison

University Honors Theses

Programming in a baremetal environment, directly on top of hardware with very little to help manage memory or ensure safety, can be dangerous even for experienced programmers. Programming languages can ease the burden on developers and sometimes take care of entire sets of errors. This is not the case for a language like C that will do almost anything you want, for better or worse. To operate in a baremetal environment often requires direct control over memory, but it would be nice to have that capability without sacrificing safety guarantees. Rust is a new language that aims to fit this …

Social Media In Business-To-Business Marketing And Sales: Review Of Literature & Research Recommendations, Daniel Bello Manjarrez

University Honors Theses

Social media usage in business to business marketing and sales has been steadily rising since its advent in the late 2000s. Similarly, research surrounding social media in this context has increased, with specific focus on its usage, influence, and adoption from B2B marketers and salespeople. This focus has resulted in gaps in the literature, especially when regarding small and medium B2B enterprises. This review of literature provides a systemic understanding of the research landscape by identifying the theory, methods, context, and results of twenty-one peer-reviewed business marketing articles concerning social media. This review also proposes five key recommendations to inform …

Exploring Perceptions Of Healthcare Quality In Oregon Male Prisons: Interviews With Individuals Recently Released From Long-Term Imprisonment, Rén Rosz

University Honors Theses

The healthcare that people who are imprisoned receive is inadequate and does not meet the requirements owed to them by the Eighth Amendment. The Bureau of Justice Statistics has repeatedly surveyed inmates about the health care that they receive (Bureau of Justice Statistics [BJS], n.d.). One of the most recent iterations, in 2004, showed that there were large gaps in the health care that prisoners received: not being able to see a healthcare provider after an injury, necessary medications being discontinued, and lab tests being restricted (Wilper, et al, 2009). The surveys were implemented to highlight policies needing correction and …

Socio-Emotional Learning As A Core Standard In Early Education: Producing Competent Adults, Talia Maras

University Honors Theses

A child’s foundational emotional proficiency is highly predictive of their academic success. It is therefore imperative that center-based, federally funded, public childhood education systems provide their students with a curriculum that facilitates the development of a strong socio-emotional baseline on which to build their cognitive, academic abilities. Drawing on government reports by the US Department of Education and empirical publications from an academic perspective, this paper reviews the nature of current efforts to reform the childhood education system, as seen through the implementation of the common core standards of learning. I review the quality of education that is provided by …