Digital Commons Network^™

Synthesis And Computational Studies Of Α- And Δ-Substituted Macrocyclic Europium And Ytterbium Complexes, Delainey Amara Winder

Dissertations and Theses

The uses of macrocyclic lanthanide complexes are vast, with many targeted MRI contrast agents at the forefront of the field. Many of these are ParaCEST agents, which require exchangeable protons accessible on the macrocycle and the slow exchange of coordinated water molecules. The substitution at both the α- and δ-carbon on the amide pendant arm of these macrocyclic lanthanide complexes can lock bulky groups on the δ-carbon to a pseudo-axial position. When the α- and δ-carbons have the same chirality, the bulky group will be pseudo-equatorial, and when the chirality is opposed, the bulky group will be pseudo-axial. By performing …

The Influence Of Eyewitnesses And Police Tip Line Reports: An Exploratory Case Study Of A 2005 Homicide, Abigail Rose Torres

Dissertations and Theses

Public tip lines provide the public to provide information [sic] to the police when there is an ongoing investigation. These public tip lines could increase investigations where the public is being made aware of the investigation, increasing the amount of information being brought forward. Research focuses on how tips reporting is similar to eyewitnesses in that individuals recall information. The literature illustrates how the media can influence the tips. The study is an exploratory content analysis looking at potential themes or patterns that emerged from analyzing the tips and patterns of the tip line and media files related to an …

Centering The Leader: An Investigation Of Leader-Centric Variables In The Support Provision Process, Jordyn Jan Leslie

Dissertations and Theses

Few studies to date have investigated leader-centric variables associated with the support provision process. The following dissertation includes three studies that attempt to further understand such relationships. In Study 1, the interaction between leader sleep quantity and quality on various types of leader support (e.g., general supervisor support, family supportive supervisor behaviors, and sleep leadership) is studied using both employee and leader ratings. Study 2 integrates leader-centric research with work-life supportive leadership to propose a new theoretical model that delineates leader-centric variables (e.g., health & well-being, skills, role expectations, job demands) as precursors to the provision and perception of work-life …

Large Length Scale Droplet Capillary Phenomena: Generation, Jump, And Capture, Karl Jeffrey Theodore Cardin

Dissertations and Theses

Understanding the life cycle of droplets, from generation to capture, for example, is critical to understanding environments from the air-sea interface to the indoor environment of the International Space Station. Investigations have been performed in this work to provide insight into three droplet phenomena, each ubiquitous in both terrestrial and microgravity settings, through a lens of capillary flow. Each investigation attempts to disentangle the effects of gravity from the effects of surface tension. A drop tower test campaign is performed for each of the three investigations. Models are developed and simulations are performed to rationalize the observations. Each investigation is …

The Effects Of Physical Accessibility And Subjective Accessibility On Grocery Shopping Behaviors In Oakland, California, Huijun Tan

Dissertations and Theses

Existing studies underscore the complexity of urban accessibility, defined by a range of factors, including the city's physical layout and infrastructure as well as the subjective perceptions and experiences of its inhabitants. As urban areas continue to grow and diversify, gaining a comprehensive understanding of these varied interactions is imperative. This broader context highlights the necessity of investigating the interplay between physical and subjective accessibility, aiming to illuminate the specific challenges and opportunities faced by these communities in accessing necessary services. This study explored the relationship between physical and subjective accessibility and their consequential impact on grocery shopping behaviors among …

Synoptic Drivers Of Extreme Precipitation In The Upper Yuba Watershed Of California, Emma Nichole Russell

Dissertations and Theses

California's annual precipitation is dependent on a few strong storms and in addition to its Mediterranean climate, leads to great variability in precipitation both within and across years. While efforts to reduce the impacts of extreme precipitation events have been implemented, forecasting for these events remains a challenge in regions with complex terrain and dynamic meteorological drivers. In order to improve forecasting and preparedness for such events, it is important to understand the range of atmospheric drivers that lead to extreme precipitation, particularly on a small scale. Here we aim to better understand the variety of meteorological mechanisms resulting in …

"We're Going To Tear Up The Caldera So We Can Have An Electric Car": Competing Perceptions And Spatial Dimensions Of Open-Pit Lithium Mining In The Mcdermitt Caldera, Oregon, Elizabeth Bartholomew

Dissertations and Theses

The McDermitt Caldera, spanning from southeastern Oregon into northern Nevada, is believed to hold the largest lithium deposit in the United States. Actions have been swift to begin extraction in Nevada’s section of the Caldera. The construction of the Thacker Pass open-pit mine began in the spring of 2023, despite legal opposition from pan Indigenous groups, ranchers, and environmental groups. Across the border in Oregon, mining claims are scattered throughout the Caldera and exploratory drilling has begun. Given the early stage and rapid progression of these mining activities, there is a small but growing body of research regarding lithium mining …

Dynamic Social Ecologies Of Students' Motivational Resilience: The Complex Relationship Between Family, Teacher, And Peer Support, And Students' Academic Coping And Reengagement, Kristen Elizabeth Raine

Dissertations and Theses

Drawing upon self-determination theory (SDT) based models of motivational resilience, the following dissertation contains three studies that expand upon the current literature by investigating how processes of motivational resilience, or children's general capacity to handle the everyday academic stressors they encounter at school, are connected to the complex social ecologies created by the intersecting contexts of school and home. Study 1 examined whether family motivational support predicted increases in student reengagement through its effect on subsequent levels of students' self-system processes of relatedness, competence, and autonomy in a sample of 590 early adolescents from an urban middle school in the …

Phytoplankton Community Dynamics In The Northern California Current System, Kristin E. Forgrave

Dissertations and Theses

The Northern California Current system is a productive coastal ecosystem encompassing a variety of temporal and spatial features. The photosynthetic microbial community plays a crucial role in supporting the rich ecosystem and its economically important fisheries. My research integrates data across location and two years to investigate the community composition of two major phytoplankton groups in this system: picocyanobacteria and photosynthetic picoeukaryotes (PPE). The abundances and sizes of the phytoplankton were measured using flow cytometry. I found PPE present at similar concentrations in both summer and winter seasons. Abundances of both PPE and picocyanobacteria were comparable in the winter, but …

Concolic Testing For Scripting Languages, Zhe Li

Dissertations and Theses

Scripting languages, such as JavaScript and Lua, are becoming more and more popular. They are typically easy to learn and use, making them accessible to a wide range of developers, even those with limited programming experience. Lua, for instance, is a lightweight, efficient, and versatile scripting language. It is designed to be easy to integrate into other systems and is often used as an embedded scripting language in larger applications such as NMap, which is a network scanning tool.

As another example, web front-end development with JavaScript (JS) is a popular choice for developers due to its ability to add …

Exploring Evidentiary Approaches And Reform Potential In The Allies In Change Program For Abusive Intimate Partners, Julie Melissa Conner

Dissertations and Theses

This thesis examines the Allies in Change batterer intervention program, analyzing its curriculum components, alignment with evidence-based practices, unique features, limitations, and implications for domestic violence intervention. The study employs a qualitative mixed-methods approach, including curriculum textual analysis, word frequency count, a semi-structured interview with Chris Huffine, the curriculum author and program founder, and observation of a forty-hour domestic violence training provided for batterer intervention programs and facilitators.

The research begins by reviewing the literature on domestic violence intervention, highlighting the importance of evidence-based practices, cognitive behavioral techniques, and cultural responsiveness. It then conducts a textual analysis of the Allies …

The Conflict Between The United States And Iran And Its Effect On Iraq, Sarah Alsalih

Dissertations and Theses

This thesis examines the dynamic interplay between the United States and Iran and its repercussions on Iraq in the post-9/11 era. Against a backdrop of historical adversities, the research delves into the evolving relationship between the U.S. and Iran, elucidating its multifaceted dimensions and the consequential effects on Iraq. The central inquiry driving this investigation is: "Against the adversarial historical backdrop of U.S.-Iran relations, how has the relation between the two countries changed and impacted Iraq throughout the post 9/11 era?"

Drawing upon a comprehensive analysis through the lens of diplomatic interactions, military interventions, and regional dynamics, this study seeks …

An Examination Of The Impact Of Court-Appointed Fines And Fees: How Governmental Reliance On These Expenses Is Harming Vulnerable Communities, Rachel Elizabeth Couche

Dissertations and Theses

Fines and fees are commonplace in the United States criminal justice system as a form of punishment for both minor and severe offenses. While substantial research has demonstrated that these financial consequences disproportionately affect certain communities, studies that depict a narrative of these impacts are vastly underrepresented in the field. This project expands upon past literature by delving into the effects of these practices on individuals and their families. The current study outlines the findings from a content analysis of twelve semi-structured interviews on the impacts of fines and fees in Oregon. The findings create a deeper understanding of how …

An Analysis Of Citizen Participation In Spatial Plan Preparation, Case Study Of Gaborone City, Botswana, Bongani Tshidiso Ikaneng

Dissertations and Theses

In the dynamic field of urban planning, the significance of citizen participation in shaping spatial plans has grown substantially. Research exploring the significance of public participation in planning has become increasingly vital, highlighting the need to understand citizen’s contributions to the planning process. This study investigates the community engagement experiences of citizens in the development of a local plan, with a focus on Gaborone City, Botswana. With data that was collected through online interviews through Zoom, conducted in twelve neighborhoods between March and April 2024, which were recorded and transcribed, the study presents challenges articulated by residents about their participation …

Culture Or Power: The Eruption Of The Anglophone Crisis In Cameroon, Danielle Tagakou Talla

Dissertations and Theses

Located in Central West Africa, Cameroon has been the stage of a protracted conflict since 2016. The conflict called the "Anglophone crisis" is rooted in Cameroon colonial history. This is reflected in the composition of its population with a large majority of Francophones and only 20 percent of Anglophones. The subsequent thesis aims to examine the crisis between 2016 and 2022 and understand the shift in focus that happened in the early years of the conflict. Using a qualitative methodology, journal articles, books and recorded interviews will provide substantial sources to decipher the change from cultural focus to one of …

Assessing The Climate Resilience Of Quercus Garryana In The Portland Metro Region, Jess Rose Nettle Shamek

Dissertations and Theses

In the context of rapid global climate change, understanding the resilience of local tree species is essential for fostering effective environmental stewardship and community hopefulness. Oregon white oak (Quercus garryana), an emblematic species in the Pacific Northwest, has faced significant habitat loss and degradation since settler colonization. However, it also exhibits a predicted resilience to climate change, potentially leading to a range shift and expansion. Species resilience refers to the capacity of a species to persist and adapt in the face of rapid global climate change. Beyond vulnerability assessments and niche models, we know little about this species' …

Applying Decolonizing Theories And Methodologies In Archaeology To Two Collaborative Cultural Resource Management Projects, Cydney K. Lanthier

Dissertations and Theses

Decolonizing theories and methods were employed during two separate graduate research projects. The methods of the initial project were informed by political ecology, the landscape-level historical ecology theory, Tribal sovereignty, traditional ecological knowledge (TEK), Indigenous archaeology, and community based participatory research (CBPR). The initial project was based entirely on CBPR and purposed to gain National Register of Historic Places (NRHP) nomination as a Traditional Cultural Property (TCP) over a portion of the traditional landscape. This project was cancelled before completion. However, several methods involved in CBPR were employed before then. The second project took on more of the historical ecology …

A Cognitive Approach To Supervisor Training Intervention Evaluation: Analyzing Change With Response Shift Theory And Models Of Measurement Invariance, Luke Daniel Mahoney

Dissertations and Theses

Field-based experimental training intervention research continues to grow in importance as a method of simultaneously testing and advancing the theoretical and empirical basis for designing and deploying interventions to improve people's lived experiences. Training interventions are often designed to create positive change in the workplace context, for example, by providing behavioral tools to supervisors to help them become more supportive of their employees. Such a training intervention was the focus of this intervention evaluation -- one focused on interpersonal dynamics between supervisors and employees. However, change is often complex and may manifest in ways not accounted for by conventional ways …

Embodied Urban Political Ecology Of Oil: Social Reproduction In Oil ‎Geographies Case Study: Ahwaz, Khuzestan, Iran, Maryam Amiri

Dissertations and Theses

This dissertation examines the transformative impact of the oil industry on social ‎reproduction ‎‎within the urban and ecological landscapes of Khuzestan Province, Iran, and ‎its center, the city ‎of Ahwaz. Specifically, the study sought to understand the effects of ‎the oil industry on social ‎reproduction in three key areas: gender relations, race/ethnic ‎relations, and daily life ‎amidst ‎environmental pollution caused by the oil industry.

‎This is explored through three sub-questions: 1) How are hierarchical socio-‎spatial ‎relationships perpetuated through practices of ‎everyday life? 2) How are gender ‎relationships redefined and ‎reproduced in the oil city? 3) How ‎are ethnic relationships ‎redefined …

Resource-Constrained 2d Scene Recovery With Single-Photon Cameras, Daphne Ariadne Kurzenhauser

Dissertations and Theses

The modern world is built of images. However, in our goal to photograph and replicate what the human eye is capable of seeing, we are throttled by the restrictions of conventional imaging sensors in high- and low-illumination environments. Single-photon cameras (SPCs) have recently emerged as a promising alternative to conventional camera sensors for capturing images in challenging conditions such as high-dynamic range and fast scene motion. Compared to traditional CMOS cameras, SPCs exploit the arrival of individual photons rather than using an aggregate photon count to compute the brightness of pixels. However, SPCs are extremely resource-intensive, making them inconvenient for …

Artificial Intelligence As The Next Front In The Class War, Christopher Hill

Dissertations and Theses

For many years, artificial intelligence has been confined to the realm of science fiction, and while the technology has been in development, predicting the effects AI will have on our society has been a challenging endeavor. The release of ChatGPT in 2022, the subsequent mass adoption of the AI chatbot, and the response by other private firms in the field announced AI's permanent entrance into the public sphere. These recent strides made in the field of artificial intelligence reveal that the pace of technological development has outstripped the rate at which we are able to politically examine and understand these …

Undergraduate Students Of Color Raising Children And Persisting In Higher Education, Kimberly Denise Alvarez

Dissertations and Theses

Millions of undergraduate students have been identified as parents across the United States. Of those millions, a majority have been identified as undergraduate students of Color who are pregnant, parenting, frequently underrepresented, and often not equitably supported toward degree completion. The purpose of the qualitative single-site case study was to learn what undergraduate students of Color who are parenting have experienced, in terms of support for their continued enrollment, while earning baccalaureate degrees at Portland State University. Through an asset-based approach, this study elaborated on three key findings which include the persistent aspirations of undergraduate Students of Color (USPs of …

An Exploratory Study Of An Executive Team Leading Diversity, Equity, Inclusion, And Belonging (Deib), Tara Lashawn Cooper

Dissertations and Theses

With the increasing demographic diversity and critical focus on social justice in the United States, leaders are under significant pressure to integrate diversity, equity, inclusion and belonging (DEIB) strategies into their core operations and organizational culture. Challenged to think more critically about how to better prepare and support leaders in DEIB efforts, minimal research exists to provide insights on how executives should prepare, what they might expect, or the proven practices in DEIB. Driven by this lack of literature, this qualitative study explored how an executive team experienced and navigated the complexities of integrating and advancing DEIB in their organization. …

Yang-Baxter Equations, David Lovitz

Dissertations and Theses

Multiple equations in math, physics, quantum information, and elsewhere are referred to as "the" Yang-Baxter equation, in spite of being a broad family of equations. Most of the equations are nonlinear matrix equations, where the unknown variable is a matrix. This is the case for the so called braided, algebraic, and generalized forms of "the" equation, which are the primary focus of this dissertation. Finding solutions to the various forms of these equations has been the subject of much research. The equations in all their forms are largely considered intractable in high dimensions, and only in dimension 2 have the …

Social Reproduction On Campus: Quantitative Investigations Into The Reproduction Of Gender And Socioeconomic Inequality Through Higher Education, Ned William Tilbrook

Dissertations and Theses

This dissertation examines two key axes of inequality in higher education -- gender and socioeconomic status (SES) -- in terms of differences in college persistence and college major using the nationally-representative High School Longitudinal Study of 2009. While gender differences in terms of STEM majors has been oft-studied, this dissertation contributes to this body of literature by advancing Health & Social Sciences (HSS) majors as a separate category and examining the ways in which men and women may be sorted into these different types of major before and during college, despite the strong overlap in science and math related content. …

The Genetic Consequences Of Pollen And Seed Transport In The Wind, Elizabeth Hendrickson Scott

Dissertations and Theses

Dispersal is a crucial ecological and evolutionary process in plants. Seed dispersal is responsible for the colonization of novel locations and for range expansion in response to climate change, and pollen dispersal is important for the maintenance of genetic diversity in populations, particularly through long-distance dispersal events. Because plants are sessile, many species are dependent upon dispersal vectors to facilitate gene flow. Dispersal in the wind is a common vector in multiple plant families, as dispersal by abiotic vectors does not depend on community composition and is therefore more reliable than dispersal by biotic vectors. Despite prevalence among plant systems, …

Dft Based Modeling Of The Heavy Atom Effect In Triplet Photosensitizers: From Fundamental Mechanics To Rational Design, Bret Andrew Steinkamp

Dissertations and Theses

Photochemistry is the study of how light interacts with molecules and includes both the absorption and release of light. This document focuses on triplet photosensitizers -- molecules that utilize the excited triplet state -- for a variety of applications including photodynamic therapy and photocatalysis. There are many factors that influence the design of triplet photosensitizers; in this work, we have developed and used a methodology for the rational design of triplet photosensitizers based on an approximation of the heavy atom effect (HAE) from density functional theory calculations and the experimentally measured singlet oxygen quantum yield (Ф_Δ).

As excited …

Embodying Whole Community Preparedness: A Case Study Of Student-Facing Preparedness Initiatives At Institutions Of Higher Education In The State Of Oregon, Francis Pastorelle

Dissertations and Theses

Over the last two decades, there has been a dramatic increase in natural and manmade disasters. While no community is immune to the risks posed by these large-scale emergencies, colleges, and universities, which are home to numerous vulnerable populations, could be counted among those most at risk. In their current state of overall community preparedness, campuses are not equipped to weather impending dangers; consequently, the impact on students could be disastrous. This study examined preparedness practices at Oregon colleges and universities to better understand how institutions of higher education in the state prepare their students for large-scale emergencies, what challenges …

Strengthening U.S. Jail Systems’ Response To Infectious Diseases: An Evaluation Of The Covid-19 Pandemic, Erinn Bacchus

Dissertations and Theses

Jails across the United States were struck with increased infections and deaths during the COVID-19 pandemic. Studies have shown the structural make up of jails, lack of preparedness plans, and overcrowding contributed to health risks and poor health outcomes both inside jails and local communities. Yet little research has been dedicated to strengthening jail responses to infectious disease outbreaks spanning prevention measures, data collection, and reentry planning. Gaps include information on the (1) myriad infectious disease mitigation strategies used in jails and adherence to CDC prevention guidelines, (2) development of a standardized epidemiologic surveillance system, and (3) experiences working at …

The Nuanced Relationship Between Mindfulness, Racial Prejudice, And Policy Support, Jared Michael Cutler

Dissertations and Theses

Researchers have investigated the relationship between mindfulness and prejudice, although the findings have been somewhat inconsistent. Two broad factors may be responsible for these mixed findings: different conceptualizations of mindfulness across studies, and ideological differences among participants. Attention monitoring and acceptance, together, are proposed to be responsible for the psychological benefits of mindfulness, including reduced emotion rumination. Attention alone, however, strengthens rumination, which predicts prejudice. Additionally, prejudice hinders the endorsement of equitable policy. As such, mindfulness measures and interventions that capture attention alone, then, may be positively related to prejudice and negatively associated with support for equitable policy, whereas mindfulness …