Digital Commons Network^™

Equidistant Sets In Spaces Of Bounded Curvature, Logan Scott Fox

Dissertations and Theses

Given a metric space (X,d), and two nonempty subsets A,B ⊆ X, we study the properties of the set of points of equal distance to A and B, which we call the equidistant set E(A,B). In general, the structure of the equidistant set is quite unpredictable, so we look for conditions on the ambient space, as well as the given subsets, which lead to some regularity of the properties of the equidistant set. At a minimum, we will always require that X is path connected (so that E( …

The Practice Of Traditional Grading: A Site For Inquiring Into Teacher Identity Friction In A U.S. High School, Sarah Emily Dutton-Breen

Dissertations and Theses

High school teachers' identities and agency are often affected by systems that require their compliance if the teachers are to maintain employment. Sometimes when teachers perform an expected task, they experience identity friction, a term created to explain the residual effect of performing an institutional obligation that is misaligned with a teacher's identity and agency. Considering the potential impact of grades on students' academic opportunities and perceptions of themselves, one teacher obligation that creates identity friction is assigning student grades. And yet, scant research has been done on the impact identity friction -- resulting from working within the traditional grading …

The Effect Of Peer Relationships And Cyberbullying Victimization On Young Adults' Propensity To Cyberbully, Taaj Weraphorn Orr

Dissertations and Theses

Technology has deeply engrained itself in our daily lives, leading us to develop a reliance on social media to interact with those in our inner circle and stay connected with what happens around the world. However, with all these changes in technology and how we socialize with one another, we find ourselves exposed to the dangers of cybercrime, cyberbullying. General Strain Theory (GST) could be a useful framework for understanding why cyberbullying exists and why it may be difficult to address it. I collected data through a survey, after recruiting college students, and conducted correlation, mediation, and multiple regression analyses …

The Rise Of Neo-Fascist Populism And Islamophobia In The West, Mohamed Tawfiq Said Tabib

Dissertations and Theses

Trumpism can be defined as racist right-wing neo-fascist populism and nativism combined with a cult of personality. There is very little distinction between neo-fascists, the alt-right, and far-right groups. All can be identified by their socio-political philosophy and vehement beliefs of racial supremacy, ultranationalism, populism, xenophobia, nativism, and anti-immigrant sentiment, as well as being opposed to liberal Western democracy and its values. This thesis explores why there has been a popular international resurgence of far-right neo-fascist movements throughout the European Union and the United States and examines the impact on inter-group social and political relations with those of different racial …

Investigating Active Learning Through The Lens Of Student Engagement, Nicole Naibert

Dissertations and Theses

Incorporating active learning into a course has been generally found to lead to improved student learning outcomes; however, not all students benefit from these environments to the same extent. Although active learning environments provide the opportunity for students to interact and engage with the material, whether a student decides to do so is completely up to them. Therefore, the goal of this dissertation was to begin exploring active learning environments through the lens of student engagement and relevant associated variables (i.e., self-efficacy and student perceptions). This was completed through three separate but related projects.

Project I focused on investigating flipped …

A Multi-Species Study On Several Types Of Visitor Effects On The Behavior And Physiology Of Animals At The Oregon Zoo, Laurel Berylline Fink

Dissertations and Theses

The visitor effect on zoo animals is one of the expanding research topics in zoo animal research. As visitors are a mandatory feature of zoological institutions, understanding their effects on zoo animals is imperative for maximizing zoo animal welfare. Zoo animals are subject to many anthropogenic influences: visual, olfactory, and audible, for example. This dissertation investigates several of the effects of visitor presence and its relative influence on six mammalian species: cheetahs (Acinonyx jubatus), African painted dogs (Lycaon pictus), Asian elephants (Elephas maximus indicus & Elephas maximus borneensis), giraffes (Giraffa camelopardalis reticulata & …

The Connections Between Innovation, Culture, And Expertise In Water Infrastructure Organizations, Alice Brawley-Chesworth

Dissertations and Theses

Infrastructure organizations are notoriously conservative and resistant to change, even when faced with wicked problems that cannot be solved with the same thinking used in the past. In the water sector, this resistance to change has been linked to an industry culture that is based in a single, engineering-oriented knowledge system. Scholars have suggested that diversification of knowledge systems is necessary for implementation of innovations that will move the sector forward to solve wicked problems.

This research used a qualitative case study approach comparing two water sector organizations in Portland, Oregon. One organization included members who shared an engineering knowledge …

The Plant Water Management Experiments, Marc Benjamin Wasserman

Dissertations and Theses

A simple means of watering plants in the low-g environment aboard orbiting spacecraft is not obvious. Since the beginning of spaceflight, numerous approaches have been pursued to water plants that seek to maximize plant viability and system reliability, while minimizing crew time and system complexity. The Plant Water Management experiments (PWM) seek to apply recent advances in low-gravity capillary fluidics to the challenges faced during plant growth operations aboard spacecraft. One primary challenge encountered in such applications is to establish Earth-like flows, minimizing the low-g specific adaptations required by the plants. This is difficult due to the fluid physics challenges …

Building A Turbulent Jet: Measuring/Modeling Lagrangian Dispersion, Particle Trajectory Dynamics And Intermittency, Bianca Fontanin Viggiano

Dissertations and Theses

The mechanics of how particles diffuse, interact, eject, etc. within a fluid is applicable to numerous industrial and environmental applications. Unwanted products of combustion, dust contamination of solar panels, pathogen transport during a cough and ejections of particles during volcanic eruptions, are a few examples of flows in which increased knowledge of particle dynamics could result in substantial reduction of negative environmental and economic impacts. To better understand the tendencies of particles within shearing flows (such as jets), an extensive experimental campaign was conducted. Measurements of a turbulent round water jet were performed within an icosahedral tank. Particle tracking velocimetry …

Keeping In Touch While Sheltering In Place: A Comparative Case Study On The Complex Emotions Experienced By Older Adults When Introduced To Icts And Video Conferencing Services, Marisa Susan Soltz

Dissertations and Theses

Currently, COVID-19 poses a threat to the US and the rest of the world, which has created the need for many people to establish physical distance from others. This need for physical distance is perhaps most important for those most vulnerable to COVID-19, which includes the older adult population. Through this time of physical isolation, most people need to keep in touch with each other while sheltering in place. Advances in digital communication have offered new avenues to help people maintain communication, and these advances have made the lives of many easier and more efficient. These new avenues for communication …

Fortunate People In A Fortunate Land: Dwelling And Residential Alienation In Santa Monica's Rent-Controlled Housing, Lauren E.M. Everett

Dissertations and Theses

The importance of safe and stable housing for individual and community wellbeing is widely acknowledged. However, for the one third of Americans who rent their homes, housing-related stress and precarity (residential alienation) may undermine stability and a sense of home. Rent control is perhaps the most well-known tenant protection policy in the United States, but it remains highly controversial and its efficacy has been debated for decades. This research is the first academic inquiry to examine the policy through the experience of residents of rent-controlled housing. In academic discourse dominated by quantitative inquiry from the discipline of economics, this study …

Interwar Weimar Film And Masculinity: Challenging The Presumed Crisis Of Interwar German Gender Discourse From Selected Films From 1925-1931, Brandon Metcalf

Dissertations and Theses

The First World War altered the view of masculinity held by many in Germany and shredded what many regarded as unchangeable fixtures of German life. For German men, much of the interwar period meant dealing with the losses from the war, reconfiguring what it meant to be a man. This reconfiguration of gender took place in a context of change in Germany. Many women entered the workforce to replace the lost men. The economic downturn and reliance on funding from the United States motivated many within Germany to examine gender roles and to reassemble masculinity to meet changing circumstances.

This …

The Meaning And Measure Of Deliberative Systems, Darren Michael Mccormick

Dissertations and Theses

Deliberative democratic theory emphasizes deliberation as central to the health of democracy. It has grown to be one of the most active and popular stands of political theory. In response to criticisms that deliberative democracy was unworkable at the large scale, the field made a systemic turn and now conceives of political communities as potential deliberative systems. While advancements have been made in measuring the quality of deliberation that occurs in deliberative forums, the practice of measuring the quality of deliberative systems is in its infancy. Authors have proposed various theoretical paths to assessing deliberative systems but no standardized method …

An Investigation Into Magnetic Gears And Magnetic Springs For Marine Hydrokinetic Power Generators, Hossein Baninajar

Dissertations and Theses

Marine hydrokinetic generators often use mechanical gears to convert the low-speed motion into the high-speed rotary motion that is required for conventional electrical generators. While mechanical gearboxes have a high torque density and can reach high efficiencies, they suffer from serious reliability issues. Recently, magnetic gearing technology has been proposed as a means of making hydrokinetic generators more reliable. As magnetic gears use magnetic field modulation to create speed change, they offer a high reliability, nonfriction, power transmission mechanism that limits the wear to only the bearings and makes the magnetic gears almost maintenance-free. During an over-torque condition, a magnetic …

Stakeholder Participation And Influence At State Public Utility Commissions, Genevieve Theresa Kruse

Dissertations and Theses

Despite the international consensus that climate change is a problem, few substantive policies are being pushed forward at the national level to meet international greenhouse gas reduction commitments under the Paris Agreement. The most significant climate change policies are emerging at state public utility commissions (PUCs). While PUCs were traditionally structured to regulate utilities, state PUCs are now finding themselves at the hub for renewable energy, clean energy, and distributed energy policies. Despite the increase in renewable and clean energy policies at state PUCs, there is a noticeably small environmental and clean energy stakeholder presence at those PUC proceedings. A …

Maturity Model For Customer-Centric Approach In Enterprise: The Case Of E-Commerce And Online Retail Industry, Soheil Zarrin

Dissertations and Theses

The network technologies are changing the dynamics of the interaction between customer and provider. Customers demand closer relationships and higher investment between partners, as well as cooperation between companies to build supporting technologies for their unique needs. Customer-centricity is defined as interaction with the customer through various touchpoints and aggregating these relations to create a position for the customer. Each Customer has a different need and expectation from the provider or seller, and companies need to be flexible enough to fulfill their needs. One of the reasons organizations invest less in customer experience is that they believe they are already …

Improvement Science: Improving Employee Engagement, Ryan S. Carpenter

Dissertations and Theses

Improving employee engagement has proven elusive in too many schools and districts in our nation, persistently contributing to high staff turnover in buildings and limited employee ownership in the mission, vision, and values of a school's strategic plan. The most common approach to the improvement of educational systems has been the adoption of top-down reforms and short-lived improvement programs. In recent years, an Improvement Science approach, which originated in the medical and business worlds, has made its way onto the education scene. The impact of Improvement Science in education is a developing area in educational research. This dissertation includes four …

The Benefits Of Social Support On Health And Well-Being In Military Populations: Examining Mechanisms, Source Of Support, And The Reach Of A Workplace Well-Being Intervention, Annamarie Sophia O'Neill

Dissertations and Theses

Social connection is essential for health and well-being. Although the salubrious effects of social relationships have been established, important questions remain such as: the mechanisms driving these beneficial effects, the extent that promoting social support in the workplace can benefit workers and their romantic partners, and if support from important but less close sources of support (like supervisors) can offer additional health benefits beyond support from closer relationships (like romantic partners). Over three studies, I explored these topics in the context of military couples (Studies 1 & 2) and in partnered service members (Study 3) on health and well-being outcomes …

Culture Of Care And Prosocial Leadership: Autoethnography Of An Elementary School Principal Navigating Covid-19, Ashley Marie Davis

Dissertations and Theses

Since 2016, I have been serving as principal at Davis Elementary School, a Title 1 school in Portland, Oregon. This autoethnography is a reflective account of my role as a principal during Covid-19 school closures and reopening. School systems and school leaders had to become more adaptive to change and had to find ways to creatively deal with Covid-19 challenges. Utilizing the conceptual frameworks of (a) culture of care informed by the constructs of ethic of care, cultural wealth in critical race theory, and culturally responsive leadership; and (b) prosocial leadership, this autoethnography used self-reflection and thematic analysis to elucidate …

Mass Capacity Analysis Of Stormwater Control Measures Using Synthetic Stormwater With Silica, Organic And Hydrocarbon Constituents, Craig Michael Fairbaugh

Dissertations and Theses

Stormwater control measure (SCM) performance is well studied regarding solids removal; however, analysis of mass loading capacity, long-term performance, and maintenance demands are challenging due to the variability and multiple constituents inherent in urban stormwater. This research examines the long-term water quality performance and sediment mass capacity of two common SCMs: high rate biofiltration (HRBF) and conventional bioretention (BRT). Pollutant removal trials were conducted in a laboratory setting per the New Jersey Department of Environmental Protection (NJDEP) filtration protocol in two phases: the first using inorganic sediment per the NJDEP protocol, the second phase with the addition of organic sediment …

Characterization Of High Mobility Channels For Use In Quantum Computing Devices, Payam Amin

Dissertations and Theses

Quantum computing promises computation that is fundamentally beyond the reach of classical computers. For the realization of a full-scale quantum computer, millions of quantum bits need to be fabricated on an integrated circuit and operated at cryogenic temperatures. Silicon and silicon-germanium based electron spin quantum bits have the advantage of leveraging decades of semiconductor industry knowledge for high volume manufacturability.

During the process development of any semiconductor device, material characterization is essential to understand and improve the process. Transmission electron microscopy is the only technique that could offer localized high spatial resolution characterization. In this work we have introduced two …

Eating Real Mexican: Identity, Authenticity, Americanization, Health, And Food Culture In The United States After 1900, Alexandra H. Ibarra

Dissertations and Theses

This thesis examines the connection between Mexican food and identity in the early to mid-twentieth century (1900-1950). Anglo-Americans created evolving racial/ethnic stereotypes during a period of intense Mexican immigration and nativism that used descriptions of food, hygiene habits, and health to reinforce boundaries of whiteness and citizenship.

By examining Americanization teaching manuals, food articles, as well as personal and corporate cookbooks, I seek to understand how Americanizers and other food writers used food to point to emphasize, unhygienic habits, excess use of spice and grease, as well as the "questionable" nature of immigrate food culture to separate them from Anglo-Americans. …

Effects Of Pore-Forming Peptides (Melittin And Magainin 2) On The Phospholipid Bilayer Interior, Elmukhtar Ehmed Alhatmi

Dissertations and Theses

Antimicrobial peptides (AMPs) are one of the most promising solutions to drug-resistant bacteria. Melittin and magainin 2 are two of the most representative and extensively studied AMPs. In this research, I investigated the interaction of these two AMPs with three models of cell membranes: 80% POPC 20% POPG, 40%POPC 40% POPE and 20% POPG, and 80%POPC 20%POPG plus 30% mole fraction of cholesterol. Time-resolved fluorescence emission and fluorescence anisotropy decays of the fluorescent probe 1,6-diphenyl-1,3,5-hexatriene (DPH) were analyzed to determine the effects of AMPs on the bilayer headgroup packing and changes in the interior of the phospholipid bilayer during the …

Words Matter: A Linguistic Analysis Of Cluniac Views On The Use And Abuse Of Violent Force, Amanda K. Swinford

Dissertations and Theses

The goal of this project is to isolate Cluniac attitudes towards violence and the use of martial force in the tenth through twelfth centuries, first by determining in what situations Cluniac authors deemed the shedding of human blood was permissible, and second by tracking the evolution of these attitudes from the abbey's foundation to the height of its influence. Given Cluny's role in European society, there is a rich and longstanding body of scholarship which examines Cluny's support or rejection of force as a means of conflict resolution. This study demonstrates a consistency over time in Cluniac attitudes on the …

Le Gout Qui Reste: Cultural Identity And Belonging In Ook Chung's Kimchi, Taurean James Weber-Laurencio

Dissertations and Theses

The emphasis placed on the questioning of identity in Québécois society since the Quiet Revolution of the mid-twentieth century continues to this day. Whereas this search for a specifically Québécois identity was originally cast in terms of an Anglophone/Francophone divide, the influx of migrants from around the world to the province since the 1970s has rendered such a simplistic, binary discourse impossible. The population of Québéc in general and of Montréal in particular is now multicultural; visible minorities now constitute twenty-six percent of the Montréal populace. While most migrants in Québéc are able to find a niche in Montréal in …

Seismic Performance Design Criteria Of Existing Bridge Bent Plastic Hinge Region And Rapid Repair Measures Of Earthquake Damaged Bridges Considering Future Resilience, A K M Golam Murtuz

Dissertations and Theses

The main objective of this research was to evaluate the seismic performance of existing sub-standard reinforced concrete (RC) bridge column-spread footing subassemblies and to quantify the material strain limits through a full-scale experimental program. A total of six column-footing test specimens with pre-1990 construction details were subjected to reverse cyclic lateral loading, utilizing a conventional three-cycle symmetric loading protocol and a protocol representing the demands expected from a CSZ earthquake. Additionally, the tests were designed so that variable axial loading could be applied to simulate the secondary load effects experienced during an earthquake in a column that is part of …

Using Intrinsically-Typed Definitional Interpreters To Verify Compiler Optimizations In A Monadic Intermediate Language, Dani Barrack

Dissertations and Theses

Compiler optimizations are critical to the efficiency of modern functional programs. At the same time, optimizations that unintentionally change the semantics of programs can systematically introduce errors into programs that pass through them. The question of how to best verify that optimizations and other program transformations preserve semantics is an important one, given the potential for error introduction. Dependent types allow us to prove that properties about our programs are correct, as well as to design data types and interpreters in such a way that they are correct-by-construction. In this thesis, we explore the use of dependent types and intrinsically-typed …

Robust Design Methodologies Under Performance Variations For More Than Moore Technologies: Cnfets & 3dics, Satya Keerthi Vendra

Dissertations and Theses

Various emerging technologies have shown great potential of supplementing silicon transistors as Moore's law slows down. One such disruptive technology, Carbon Nanotube Field Effect Transistors (CNFET), among others, promises increased speed and integration with reduced power consumption. However, due to a limited controllability over the Carbon Nano-tube(CNT) growth process, CNFETs show large variations in their performance and behavior. It is therefore difficult to predict and model their behavior while design suggestions are also challenging. CNT variations are important for a realistic delay modelling. Due to the presence of CNT-specific variations, conventional CMOS evaluation techniques cannot be used for CNFETs.

This …

Coming To Know The Local Environment: Children's Experiences In Rautamai Gaunpalika, Nepal, Elsie Nicole Love

Dissertations and Theses

This qualitative research, conducted over three months from late monsoon season into early fall of 2018 with twenty-six children and thirteen adults, explores how children in the hills of Rautamai Gaunpalika, Province 1, Nepal come to know their local environment. Semi-structured interviews with children, their family members, and teachers, and participant observation with children as they worked and played in forests, fields, and streams, suggest that outside of school, children come to know their local environment in the following ways: through participation in and application of knowledge to subsistence practices; through collaborative learning and teaching in mixed-age groups; through relationships …

Aerosolization Of Catalytic Rna For Prebiotic Transport And In Situ Reactivity, Brennan Roland Farrell

Dissertations and Theses

Recent theoretical and experimental work suggests that aqueous aerosols in the early Earth's atmosphere might have been an essential component to the development of life. These complex droplets would have served to compartmentalize emerging biomolecules, thereby concentrating them, increasing reactivity, and facilitating transport and exchange between ocean and atmosphere. This project tests an underexplored but potentially important environmental paradigm for the RNA world hypothesis of prebiotic evolution, probing the effects of aerosolization on catalytic RNA using a model ribozyme. Here we demonstrate the successful transport and in situ self-assembly of the Azoarcus ribozyme from multiple independent fragments via a laboratory-constructed …