Digital Commons Network^™

A Privacy-Preserving Strategy For The Trust Layer Of The Energy Grid Of Things Distributed Energy Resource Management System, Mohammed Abdullah Alsaid

Dissertations and Theses

Emergent from the shadows of the traditional grid flaws, the Smart Grid (SG) idea was born and led by government mandates toward cleaner energy production. The SG represents the next generation of electricity distribution systems that subsume recent technological innovations. It uses digital communication between its components and entities to attain more automation, self-sufficiency, and reliability. Unfortunately, this relatively new concept is not flawless; the intrinsic reliance on increased digital communication spreads open attack paths for adversaries. Therefore, finding solutions that address information exchange vulnerabilities has become imperative.

The Energy Grid of Things (EGoT) is Portland State University's implementation of …

Nmr Analyses Of Flavored E-Cigarette Liquids Before And After Aerosolization, Paul Joseph Kerber

Dissertations and Theses

Electronic cigarettes (e-cigarettes) are the most commonly used tobacco products among adolescents with ~11 and ~3% of high school and middle school students reporting past 30 day use in 2021 according to the Centers for Disease Control and Prevention (CDC), respectively. Furthermore, greater than ~80% of high school and middle school e-cigarette consumers use flavored e-liquids. Consumers can be exposed to variable toxicant levels upon e-liquid aerosolization, depending on the composition of the e-liquid, type of e-cigarette, e-cigarette settings, and other customizations.

E-liquids are typically composed of a carrier solvent (propylene glycol (PG) and glycerol (GL)), flavorants, and nicotine. PG …

Modeling Postfire Effects On Snow Albedo And Forest Recovery Over A Chronosequence Of Burned Forests In The Triple Divide Region Of The Rocky Mountains, Anton J. Surunis

Dissertations and Theses

Wildfires impact snow albedo, forest cover, and forest structure and thus snow melt rate and snowpack supply for as long as 15 years following burn. These effects have not been quantified at fine spatial resolutions and long time periods at a watershed scale. I modeled the effects of postfire effects on snow albedo, snow-mass energy balance, and resulting snow-water equivalent (SWE) depth over a long-time scale and at a fine spatial resolution. Using a spatially and temporally distributed snow evolution model called SnowModel, I modeled postfire effects on snow albedo and forest structure over postfire recovery within 8 forest fires …

Proper Orthogonal Decomposition Of Reynolds And Dispersive Stresses In Turbulent Boundary Layers Over Multi-Scale Rough Patches, Catherine Virginia Spivey

Dissertations and Theses

Multi-scale rough patches are present in topologies such as urban canopies (cities) and natural landscapes (forests, ocean floors). The flow over such canopies is three-dimensional, with turbulent structures known as secondary flows present in the boundary layer due to the difference in rough surface heterogeneities. Three dimensional instantaneous velocities are analyzed within the roughness sublayer over three generations of multi-scale rough patches at nine vertical planes using particle image velocimetry obtained experimentally. The secondary structures present in the flow are identified in the form of Reynolds and dispersive fluctuations. Proper orthogonal decomposition is employed to characterize the imprint of the …

Development Of A Configurable Derms Test System In Gridapps-D, Sean James Keene

Dissertations and Theses

Distributed Energy Resources and their increased penetration within the power grid are a suitable method to provide essential reliability services. In order to do so, they must operate in aggregate. Aggregation of a wide variety of systems with varying standards and protocols is a complex task, which could benefit from rules and standards to support interoperability. To this end, the Portland State University Power Lab has developed the Energy Grid of Things project, which includes a Distributed Energy Resource Management System to provide aggregation and demonstrate the usage of an Energy Services Interface: a set of rules governing the interface …

Learning From Machines: Insights In Forest Transpiration Using Machine Learning Methods, Morgan Thornwell

Dissertations and Theses

Machine learning has been used as a tool to model transpiration for individual sites, but few models are capable of generalizing to new locations without calibration to site data. Using the global SAPFLUXNET database, 95 tree sap flow data sites were grouped using three clustering strategies: by biome, by tree functional type, and through use of a k-means unsupervised clustering algorithm. Two supervised machine learning algorithms, a random forest algorithm and a neural network algorithm, were used to build machine learning models that predicted transpiration for each cluster. The performance and feature importance in each model were analyzed and compared …

Analyzing Classroom Discourse To Investigate Structuring Equitable Mathematical Talk In Small Groups And Whole-Class Discussions, Brittney Marie Ellis

Dissertations and Theses

Shifting classroom discourse to be more student-centered has become an integral part of reform-oriented instructional practices. At the same time, shifting discourse can open up opportunities for inequity to occur in the immediate learning environment as both the quantity and quality of mathematical talk changes. In this project, I examined complexities involved in such settings by using discourse analysis methods to explore the positioning of students relative to mathematics content and each other's mathematical ideas. First, I analyzed the ways teachers' discourse during group work enactments related to established equitable teaching practices. Findings from this study suggest communicating group tasks …

High School Persisters And Alternative Schools, Hyuny Clark-Shim

Dissertations and Theses

In response to a "dropout crisis," over the past decade much effort was made to retain high school students. Recent years' trends indicated an overall increased level of graduation rates; however, there has been a largely overlooked student population, persisters, who did not earn a high school diploma by the expected graduation date but remain engaged and continue to work towards graduation into their fifth or even sixth year of high school.

Using exploratory CART analysis, this study examined what individual-level and school-level factors were most effective in distinguishing students who were persisters versus on-time graduates. Given that persisters …

Toward Analyzing The Diversity Of Extractive Summaries, Aaron David Hudson

Dissertations and Theses

As the amount of text generated across the internet continues to increase, developing methods for processing that text to glean valuable insights is paramount. Automatic text summarization is one such method that aims to provide a concise and representative summary of input text, allowing users access to the most salient points from a large amount of textual data. However, in working with these summaries, especially those generated from social media data, questions arise about not only the quality of a summary, but also its ability to reflect the diversity of user perspectives. This work examines the quality of summaries with …

Stoneware And Earthenware From The Beeswax Wreck: Classification Of The Dubé Collection And Discussion Of The Interpretation Of The Materials In Protohistoric Sites, Vanessa Renee Litzenberg

Dissertations and Theses

Over the past three centuries, items from the Beeswax Wreck have been discovered on Oregon's northern coastline near Manzanita, including stoneware and earthenware fragments. While the stoneware and earthenware were not noticed by beachcombers washing ashore until more recently, similar artifacts have been noted within Indigenous sites for decades. While most of the analysis of the artifacts found in protohistoric settings are used to provide proof of a wreck or potentially a marker of the start of the contact period, this study aims to provide some context to the stoneware and earthenware sherds related to the wreck. The goal was …

Treatment Disparities In Emergency Medical Services: The Influence Of Race/Ethnicity, Obesity, And English Proficiency, Jamie Kennel

Dissertations and Theses

Different treatment in healthcare settings provided to different social groups of people may lead to disparities in health, quality of life, and life span. Despite the critical role among healthcare services that Emergency Medical Services (EMS) provides disproportionately for marginalized communities, it remains unclear if and to what extent treatment disparities take place in the pre-hospital setting. Guided by the theoretical frameworks of social worth, aversive racism, and stigma, this study utilizes medical chart data from three different public and private datasets to investigate treatment disparities by Emergency Medical Service providers for racial minority, obese, and limited English proficiency patients. …

Gender Equity And State-Mosque Relations In Middle East North Africa: A Case Study Of Tunisia, Joy Amarachi Agbugba

Dissertations and Theses

Why is the Middle East North Africa region consistently ranked the lowest on the gender equity scale? This question is quite perplexing and that has driven several scholarly researchers to investigate the situation of gender and women's rights within the states in the region. In this research, I explore the various theories explaining the cause of gender inequity in this region including the Islam thesis/social modernization theory, political-economic theory, and psychological/social structural theories, with an emphasis on the Islamic thesis theory. I argue that the state's support and prioritization of Muslim/sharia law over federal law is a major contributor to …

Unpaired Style Transfer Conditional Generative Adversarial Network For Scanned Document Generation, David Jonathan Hawbaker

Dissertations and Theses

Neural networks are a powerful machine learning tool, especially when trained on a large dataset of relevant high-quality data. Generative adversarial networks, image super resolution and most other image manipulation neural networks require a dataset of images and matching target images for training. Collecting and compiling that data can be time consuming and expensive. This work explores an approach for building a dataset of paired document images with a matching scanned version of each document without physical printers or scanners. A dataset of these document image pairs could be used to train a generative adversarial network or image super resolution …

"Damn, Man. The Time That I Lost": Power And The Process Of Diagnosis For Women With Chronic Illnesses, Kaitlin Roquel Yeomans

Dissertations and Theses

Historical sociological research on people with chronic illness has examined their navigation of their lives post-diagnosis. Diagnosis has been considered with regard, not to its process, but rather to its definitions. While a rich literature has been produced by such approaches, how people experience the process of diagnosis has largely been ignored. This research looks at the process of diagnosis as a series of moments, all of which hold specific meaning in the interactional context of the patient-provider relationship. Looking at diagnosis from the patient’s perspective demonstrates how information about health and illness is exchanged, navigated, and negotiated. Importantly, this …

Efficiency In The Upper Deschutes Basin: Understanding The Hydrosocial Implications Of Irrigation Canal Piping, Rebecca Anderson

Dissertations and Theses

In response to water scarcity, irrigation efficiency projects aim to conserve water for in-stream flow and agricultural use. Piping irrigation canals is a common irrigation efficiency method which reduces the loss of incidental recharge, resulting in trade-offs within a hydrosocial system. Few studies have focused on the consequences of canal piping and none have integrated a critical analysis of the social factors involved in deciding what constitutes 'efficient' water use. This study seeks to fill this gap by combining natural and social science to give attention to the scales and perspectives involved in irrigation efficiency canal piping and the material …

A Critical Discourse Analysis Of How Youth In Care Describe Social Support, Jared Israel Best

Dissertations and Theses

There are nearly 422,000 youth in foster care in the United States with 20,000 aging out each year. Youth who age out of care demonstrate worse outcomes in all areas (education, employment, homelessness, justice system involvement, and social support) compared to the general population. These outcomes represent an ideological production, or a production of knowledge regarding the discursive youth in care. Thus, dominant discourses of youth are informed and constitutive of these problematic outcomes. Similarly, youthhood is dominantly defined by risk and informed by peer groups and social relationships. This study presents findings from interviews with 22 youth preparing to …

Legislative Procedures And Perceptions Of Legitimacy, Megan Elizabeth Cox

Dissertations and Theses

While mechanisms of legitimacy development have been extensively studied in governments as a cohesive whole, procedural legitimation of the legislative branch has not been explored. Using a procedural justice framework to identify indicators of openness in legislative rules, this paper theorizes that the presence or absence of these indicators will be the key factor in public perceptions of legitimacy of the legislature. This paper hypothesizes that where more indicators are present, a legislature will be viewed as more legitimate by its citizens as compared to a legislature with fewer indicators.

Comparing Indonesia and the Philippines, two presidential democracies in Southeast …

Making Curry With Rice: An Optimizing Curry Compiler, Steven Libby

Dissertations and Theses

In this dissertation we present the RICE optimizing compiler for the functional logic language Curry. This is the first general optimizing compiler for a functional logic language. Our work is based on the idea of compiling through program transformations, which we have adapted from the functional language compiler community. We also present the GAS system for generating new program transformations, which uses the power of functional logic programming to provide a flexible framework for describing transformations. This allows us to describe and implement a wide range of optimizations including inlining, shortcut deforestation, unboxing, and case shortcutting, a new optimization we …

Silos In Higher Education Institutions: Shifting From Organizational Phenomena To A Practical Framework For Equitable Decision-Making, Mandi Sue Mizuta

Dissertations and Theses

As higher education has evolved, administrative and support functions have become more stratified and specialized, creating institutions with complex and compartmentalized organizational structures known as silos. These silos have a detrimental impact on institutions, employees, and ultimately the student stakeholders that they serve. Silos within higher education administration support services are readily acknowledged anecdotally; however, robust research to describe this phenomenon and actionable resources to address it are lacking. This multi-paper dissertation explores the theoretical implications and practical applications for using collaborative, intentional approaches to address what is argued to be at its core is a matter of equity. The …

Erasure Through Engagement: The Community Resettlement Of Isle De Jean Charles, Meghan Elizabeth Sullivan

Dissertations and Theses

The State of Louisiana and the national media have claimed that the community resettlement of Isle de Jean Charles (IDJC) is an example of a 'model resettlement' for communities experiencing the impacts of climate change. At the outset, the project was advocated and led by the tribal leadership of the Isle de Jean Charles Band of the Biloxi-Chitimacha-Choctaw Tribe. Although, through the course of the resettlement the supposed partnership between the State of Louisiana and the Tribe has dissolved. This study seeks to provide a robust and in-depth understanding of the planning and implementation process of the IDJC resettlement to …

Work-Related Ipv Among Latinos: Exploring The Roles Of Fatherhood Status, Gendered Expectations, And Support For Intimate Partner's Employment, Adrian Luis Manriquez

Dissertations and Theses

IPV can spill over from individuals' personal lives into their work lives. Men's work-related IPV perpetration has been found to negatively impact their work performance and employment outcomes. Additionally, acculturation, lack of support for an intimate partner's maintenance employment, and traditional gender role expectations may have an impact on Latinos' work-related IPV perpetration. However, it is plausible that fatherhood can serve as a point of intervention for ending men's IPV perpetration. The current study aimed to examine the moderating effect of fatherhood status on the relationship between various risk factors for IPV perpetration and work-related IPV behaviors among Latinos. Additionally, …

Exploring Structure-Function Relationship In Small-Molecular Catalysts Using Computational And Experimental Methodologies, Avik Bhattacharjee

Dissertations and Theses

Molecular modeling is a useful tool in the field of catalyst design for various processes. The use of Density Functional Theory (DFT) is routine in almost every discipline of chemistry. This allows for a deeper understanding of a molecular system even in situations where implementation of an experimental technique is unfeasible. However, without the right choice of theory and insufficient description, the model becomes susceptible to produce ambiguous results. This often leads to poor correlation with experimental findings hence an incomplete understanding of the system under study. Hence, to acquire a thorough knowledge of the intricacies involved in a system, …

Same Game, Different Rules: Pointillist Imperialism And The New Cartography Of Great Power Competition, Andrew Jesse Shaughnessy

Dissertations and Theses

For centuries, "Great Powers" competed for global hegemony not only through building up military strength and amassing wealth, but through the formal acquisition of distant lands, conquered and folded into their borders. Today, core states continue to vie for global power, but no longer exert formal control or sovereignty over less powerful states. So how has the nature of great power competition in peripheral states changed? Most scholars studying great power competition measure power in terms of military and economic resources, often failing to account for a third, crucial dimension in international power politics: the impact of distributed networks of …

Sleeping To Support: An Examination Of The Relationship Between Leader Sleep And Positive Support Behaviors, Jordyn Jan Leslie

Dissertations and Theses

Although research has documented the relationship between sleep and workplace outcomes among general employees, less research has focused on the role of sleep among workplace leaders. Drawing from the work, nonwork, and sleep theoretical model (Crain et al., 2018), the current study investigates emotional exhaustion the link between leader sleep quantity on a constellation of positive leader support behaviors (i.e., general supervisor support, family supportive supervisor behaviors (FSSB), and sleep leadership) rated by both the leader and their direct employee. To gain a deeper understanding of the role of sleep in these relationships, this study examines the interaction between sleep …

In Sickness And In Health: Parasites Of Stranded Pacific Harbor Seals (Phoca Vitulina Richardii) In Northern Oregon And Southern Washington, Cecily Douglas Bronson

Dissertations and Theses

Parasites have the capability to infect virtually every living organism on the planet and have adapted to infiltrate every trophic level. Many species have complex indirect life cycles and rely upon hosts at different levels of the food web for growth and reproduction. In the marine environment, having a high level of parasite diversity is thought to indicate a more stable ecosystem than an environment with low parasite diversity. As one of the top predators in their environment and because of their amphibious behaviors, pinnipeds (seals and sea lions) are exposed to a wide variety of parasites, making them ideal …

Electron Backscatter Diffraction Analysis Of Olivine In Ureilite Meteorites: Evaluation Of The Partially Magmatic Catastrophic Disruption Model Of The Ureilite Parent Body (Upb), James Karl Frye

Dissertations and Theses

Past studies of olivine have yielded insights into crystallographic slip systems and how they are activated thermally. Using this information in conjunction with Electron Backscatter Diffraction (EBSD) analysis and metrics developed for chondrites, I constrained the thermal environment and the cooling rate for four ureilite meteorites in an attempt to test the model of catastrophic disruption of the ureilite parent body while it was partly molten. Present evidence for deformation, along with thermal metrics, were examined in order to conclude the following: Deformation of the meteorites took place at high temperatures followed by swift cooling, leaving little time for annealing. …

Do Motives Matter? The Role Of Motivation In Shaping The Impact Of Mindfulness Training On Teachers' Psychological Distress And Wellbeing, Cristi N. Pinela

Dissertations and Theses

Research on the impacts of mindfulness trainings (MTs) on teachers' psychological health and wellbeing suggests that MTs may be especially well-suited to preparing teachers for the unique demands of the profession. However, few studies have investigated whether different teachers benefit in different ways from mindfulness training, although there is some evidence that mindfulness training may yield dissociable benefits and preliminary evidence of differential effects of MTs on subgroup of teachers. The paucity of empirical evidence may be partly attributed to the paucity of theoretical frameworks that identify possible mechanisms for differential effects. The present study stepped into this gap by …

In Their Own Words: Examining The Educational Experiences, Expectations, And Values Of Oregon Low-Income, Single Black Mothers, Reiko Mia Williams

Dissertations and Theses

The long-standing achievement gap between African-American students in grades k-12 and their White counterparts has inspired many educational leaders and policy makers to seek a deeper, more comprehensive understanding of the various factors affecting the well-being of Black students. The conversation has historically focused on deficits and dysfunction while ignoring strengths and resiliencies. The research in this study investigates inaccuracies regarding Black families in order to change the conversation from one of deficits to a strength-based lens. In spite of the inequities that exist for Black families with regards to housing, employment, and health, Black parents remain committed to ensuring …

Wealth And Peace: The History And Political Economy Of Montesquieu's Doux Commerce, Adam W. Saltzman

Dissertations and Theses

The purpose of this work is to trace the genesis of doux commerce from its origins as a social phenomenon, to its employment as a political theory in the Spirit of the Laws by the Enlightenment philosophe Montesquieu, to its implementation by entities globally in the aftermath. The study will seek to determine the importance of doux commerce to the evolutionary progression of societies and their economies during the eighteenth century, its role in the dissolution of mercantilism, and its position in the rise of free trade and industrial capitalism during the nineteenth century. The concept has only recently been …

Transforming Learning Communities, Transforming Ourselves: A Qualitative Investigation Of Identity Processes In A Participatory Action Research-Themed Undergraduate Course, Julia Sara Dancis

Dissertations and Theses

In contrast to the dominant, post-positivist approaches to research in psychology, participatory action research (PAR) programs aim to democratize knowledge production and participate in social action through explicitly value-based and politicized agendas. Despite the inclusive nature of this work, college students are often left out of PAR collaborations and rarely even exposed to this frame of research. The handful of researcher-educators who have conducted participatory and action-oriented research with undergraduate students report a range of benefits for students, their universities, and the surrounding communities, confirming its importance. Left unaddressed are the key identity processes that unfold during knowledge production and …