Digital Commons Network^™

Hydrogeomorphic Response Of Steep Streams Following Severe Wildfire In The Western Cascades, Oregon, David Matthew Busby

Graduate Student Theses, Dissertations, & Professional Papers

Severe wildfire may alter the morphologic resilience of steep mountain streams by increasing peak discharges, elevating inputs of sediment and wood into channels, and increasing susceptibility to landslides and debris flows. In the Pacific Northwest, where mean annual precipitation is high and mean fire return intervals range from decades to centuries, understanding of steep stream response to fire is limited. In 2020, the Western Cascade Range, Oregon, experienced wildfire of historic magnitude and severity. The objective of this study was to evaluate the hydrologic and geomorphic response of steep streams to the 2020 fires. I assessed streamflow, instream wood, and …

A Non-Deterministic Deep Learning Based Surrogate For Ice Sheet Modeling, Hannah Jordan

Graduate Student Theses, Dissertations, & Professional Papers

Surrogate modeling is a new and expanding field in the world of deep learning, providing a computationally inexpensive way to approximate results from computationally demanding high-fidelity simulations. Ice sheet modeling is one of these computationally expensive models, the model used in this study currently requires between 10 and 20 minutes to complete one simulation. While this process is adequate for certain applications, the ability to use sampling approaches to perform statistical inference becomes infeasible. This issue can be overcome by using a surrogate model to approximate the ice sheet model, bringing the time to produce output down to a tenth …

My Partner Didn’T Hit Me, So It’S Not Abuse: Exploring Factors That Contribute To Labeling Psychological Abuse Experiences & Help-Seeking, Jessica Jean Peatee

Graduate Student Theses, Dissertations, & Professional Papers

Despite the prevalence and detrimental impacts of psychological abuse, research has consistently demonstrated that many survivors of intimate partner violence (IPV) do not recognize or label these experiences as forms of relationship violence (e.g., Goldsmith & Freyd, 2005; Pipes & LeBov-Keeler, 1997; Raymond & Bruschi, 1989). Several help-seeking models suggest that abuse recognition may be a critical factor for survivors in the help-seeking process (e.g., Burke et al., 2004; Liang et al., 2005). Thus, the present study took a mixed-methods approach to explore what factors survivors identified as important for labeling experiences of psychological abuse and seeking help. As rates …

The Molly Hootch Schools After 40 Years: Successes, Failures, And Opportunities, Jody Lynne Drew

Graduate Student Theses, Dissertations, & Professional Papers

This quantitative study was designed to understand the relationship between the variables of student attendance, educator experience and turnover, and student achievement at the Molly Hootch schools in rural Alaska in an effort to understand the current state of achievement according to data from 2002–2019 collected from the Alaska Department of Education and Early Development (AKDEED) database. Data revealed that Molly Hootch school attendance was at 90% and that proficiency among student dropped from 40% to 15% during the years under review. The researcher was not granted access to review further data that could provide more concrete answers to the …

The Role Of Acculturation On The Relationship Between Selfcompassion And Depression Within Native Americans, Kristen Kaylie Pyke-Pierce

Graduate Student Theses, Dissertations, & Professional Papers

Research examining the relationship between depression and self-compassion in a Native American (NA) sample is limited (Tielke, 2016). Previous research has found a negative relationship between depression and self-compassion in the general population (Johnson & O’Brien, 2013; Macbeth & Gumley, 2012; Neff, 2003b). Additionally, culture has been found to be beneficial in decreasing depression symptoms in NA persons (Whitbeck et al., 2002). Furthermore, as far as this researcher knows, there is no research examining the relationship between depression, self-compassion and acculturation in a NA sample. This study explored the relationship between depression and self-compassion while utilizing acculturation as a moderator …

Conservation In Ecuador's Sangay-Podocarpus Connectivity Corridor: A Study Of Coproductive Capacities, Gabriel Isaac Oppler

Graduate Student Theses, Dissertations, & Professional Papers

Connectivity conservation, a growing topic across science, policy, and management, is considered an important supplement to protected areas. A diversity of ecological corridors is emerging to restore fragmented landscapes, preserve intact habitats, protect biodiversity, and improve resilience to climate change. Despite increasing expertise and resources for planning corridors, many initiatives face challenges mobilizing science and governance to implement corridors on the ground. In many cases, biophysical science is supplemented with social science to better understand the human elements of connectivity. Similarly, collaboration and partnership are heralded as essential for effective governance of corridors. However, less is known about how these …

“Making A Science Of Cooperation”: Labor, Business, Government, And The Defense Council System In The Wartime American West, 1916-1921, Robert Michael Joseph Lambeth

Graduate Student Theses, Dissertations, & Professional Papers

“Making a Science of Cooperation”: Labor, Business, Government, and the Defense Council System in the Wartime American West, 1916-1921” examines the socioeconomic and political transformations that occurred in the American West as a result of homefront mobilization for World War I. While those transformations happened at the national level as well, they were the most impactful in and inherently informed by the political and socioeconomic developments occurring in the western states at the time.

The vehicle in which those transformations were delivered was the Defense Council System (DCS), a unique federal mobilization program that enlisted the help of the nation’s …

Understanding And Improving Barriers To Treatment And Care Of Postpartum Depression, Marcy N. Hanson

Graduate Student Theses, Dissertations, & Professional Papers

Background: Postpartum depression (PPD) is a multifaceted and complex issue that impacts not only the mother, but also the infant and social system and may influence how healthcare is accessed. Compounding the effects of PPD are comorbidities such as perinatal substance use. Utilization of substances during pregnancy can increase feelings of anxiety and depression, result in cognitive and physiological consequences for the infant and impair relationships with healthcare providers.

Purpose: The studies completed for this dissertation revealed current concerns regarding PPD within the context of screening practices, perinatal substance use and rural practice implications.

Methods: Three studies were conducted. Study …

The Effects Humidity & Temperature Has On Dna Contamination During Storage, Samantha L. Ramey

Graduate Student Theses, Dissertations, & Professional Papers

Studies have been conducted on DNA cross-contamination throughout the criminal investigation process in order to evaluation the possibility that DNA from one sample could potentially influence the outcome of another. However, no published studies have examined the potential for contamination during the storage of genetic evidence after samples have been taken from crime scenes or suspects. This study is a continuation of a preliminary project, which examined storage drying time in relation to cross-contamination. The current study tested temperature and humidity for the potential of cross-contamination during storage prior to extraction. Prior to storage, 50 μl of male saliva was …

Toward A Dialectical Account Of Nature, Georgia Rae Grimm

Graduate Student Theses, Dissertations, & Professional Papers

The protection of nature has been a central aim of environmentalism for well over a century. However, the concept of nature has been subjected to abundant critiques in recent literature, threatening the conceptual tenability of this goal. In this paper, I discuss why I find the concept of nature too valuable to dismiss and offer an account of nature that I believe remedies existent critiques. In Chapter 1, I recount arguments for the protection of nature and illustrate their dualistic underpinnings. In Chapter 2, I discuss issues with dualistic accounts of nature and demonstrate why Steven Vogel’s monistic alternative is …

Traumatic Brain Injury: An Interdisciplinary Approach To Healthcare Oversight, Charles Robert Brown Gatlin

Graduate Student Theses, Dissertations, & Professional Papers

Introduction: State licensing boards (SLBs) serve as overseers to protect the interests of the public by ensuring that individuals who operate under a license to practice in a state uphold the standards of their profession. However, resolving complaints regarding unprofessional conduct for conditions that necessitate interdisciplinary care, such as traumatic brain injury (TBI), may necessitate involvement from SLBs of other disciplines who are most qualified to evaluate the appropriateness of care. To date, there is no single pathway to address complaints regarding the interdisciplinary management of TBI as the mechanisms of the injury are complex, often do not address the …

Characterizing Riverine Carbon: A Spatiotemporal Study Of Organic And Inorganic Carbon Variability And Evaluation Of Methods For Quantifying Pco2, Fischer Larson Young

Graduate Student Theses, Dissertations, & Professional Papers

Carbon is a critical component of aquatic ecosystems. For inland waters, carbon is a basal resource for biological communities and is a key component of trophic transfer through ingestion and respiration processes. Additionally, carbon acts as a key biogeochemical tracer that can track chemical, physical, and biological processes from the terrestrial landscape to inland waters to the ocean. Riverine carbon, however, can be challenging to characterize and interpret due to the complexity of its sources and sinks along a riverine continuum. Included in this work are the biogeochemically relevant forms of carbon such as dissolved inorganic carbon (DIC), the partial …

Genetic Monitoring And Rescue In Mid-Atlantic Brook Trout (Salvelinus Fontinalis) Poulations, Zachary Lorn Robinson

Graduate Student Theses, Dissertations, & Professional Papers

Brook trout (Salvelinus fontinalis) populations have experienced dramatic declines throughout their native range, in part, due to anthropogenic land use and habitat fragmentation. In the mid-Atlantic region, brook trout populations often occupy small, headwater habitat fragments in demographic and genetic isolation, making them vulnerable to inbreeding and genetic drift. My dissertation evaluates different methods for genetic assessment, monitoring, and management of small, isolated brook trout populations. First, I examined the potential value of effective number of breeders (N_b) estimates for genetic monitoring by determining whether N_b estimates were sensitive to habitat characteristics known to affect …

The Effect Of Attentional Manipulation On Cough Reflex Sensitivity In Patients With Cough Hypersensitivity Syndrome, Jane Elizabeth Reynolds

Graduate Student Theses, Dissertations, & Professional Papers

The cough reflex is complex and requires integration of sensorimotor information from the central and peripheral nervous system. Cough motor output can be volitionally modified even when a strong urge-to-cough (UTC) is felt which reinforces the idea of cortical involvement in cough and opens the door to consider how manipulating attention or changing cognitive load may impact cough reflex sensitivity. Two prior studies have shown healthy individuals have reduced cough reflex sensitivity to inhaled tussigenic stimulants when completing a distracting task, presumably due to influence from increased cognitive load. In this prospective case series study, 13 patients with cough hypersensitivity …

Quantitative Social Science Methods, Social Networks, And Scalar Mismatches: Advancing Social-Ecological Systems Science Towards Adaptation And Transformation, Holly Kathleen Nesbitt

Graduate Student Theses, Dissertations, & Professional Papers

The adaptive capacity of social-ecological systems to maintain resilience or undergo transformation is increasingly important for navigating global change. Although social interactions and ecological disturbances are often cited as an essential element of social-ecological systems, social interactions are often undertheorized and simplistic, and the relative effects of both social and ecological processes are rarely considered in tandem. In this dissertation, I work towards advancing social-ecological systems research by highlighting opportunities for improved quantitative social science methods, using structurally explicit methods to evaluate the mechanisms underpinning social interactions, and characterizing scalar mismatches in a social-ecological system experiencing a regime shift. In …

Traversing Paradigms: An Environmental Journey To Body And Mind, Martin Ceja Mejia

Graduate Student Theses, Dissertations, & Professional Papers

Traumatic life experiences altered the way I perceive the world. As a result, I embark on a journey to reshape my relationship to self, the built and natural world; to environment. In this thesis I ask: How do I want to relate to the environment? Considering I am a doubly colonized agent, I also aim to decolonize my relationship to environment along the process. Therefore, this work aims to formulate a new, personal, relationship to environment through academic literature, history, psychology, Indigenous knowledge and science, and literary studies, among other fields of knowledge. This work is interdisciplinary in nature; life …

Development Of Nanodisc Affinity Capillary Electrophoresis To Study The Interaction Of Giα Protein With Cell Membranes, Bethany R. Emeigh

Graduate Student Theses, Dissertations, & Professional Papers

Guanine nucleotide-binding proteins, or G-proteins, are crucial to cell signaling by acting as molecular switches through interactions with membrane-bound receptors. G-proteins have become of greater interest due to the possibility of novel drug targets. The G-protein alpha subunit, Gα, binds GTP before localizing to the membrane to interact with other G-protein subunits and G-protein-coupled receptors (GPCRs). Gi lacks a hydrophobic region to promote localization to the membrane, but a co-translational lipidation of the N-terminal residue stabilizes this interaction.

Protein interactions with biological membranes are challenging to study due to the complex structure of membranes and the often-limited quantities of the …

Emission And Chemistry Of Volatile Organic Compounds In Western U.S. Wildifre Smoke, Wade Jeremy Permar

Graduate Student Theses, Dissertations, & Professional Papers

Wildfires are a significant source of volatile organic compounds (VOCs) in the western U.S., emitting hundreds to thousands of different species that play key roles in tropospheric oxidation, ozone production, and secondary organic aerosol formation. Many of these VOCs have only recently been identified and quantified in laboratory burning experiments. Consequently, little is known about their emissions from wildfires, which species are most important for plume OH oxidation chemistry, and how they evolve as smoke plumes age. This dissertation aims to improve our understanding of the emissions and chemistry of VOCs in wildfire smoke using detailed in situ measurements made …

Getting To Know You: Relationship Formation Across Development In Octodon Degus, Amber Lynn Thatcher

Graduate Student Theses, Dissertations, & Professional Papers

Social relationships are a necessary part of group formation and cohesion across many animal species and can increase the health and fitness of the individuals involved. These benefits are seen across the lifespan, although the exact advantages and functions differ across developmental stages. Our current understanding of how relationships are formed and maintained is incomplete. Previous findings suggest that a measure of stability may be a useful method for understanding how relationships are formed and how this process may differ across development. The goal of this dissertation is to investigate the variability of social interactions over time and how it …

Arctic Greening: Characterizing Tundra Vegetation From In-Situ And Remotely Sensed Observations, Shira Ann Ellenson

Graduate Student Theses, Dissertations, & Professional Papers

As the Arctic has warmed at twice the rate of the global average, vegetation productivity has also been increasing. While satellite remote sensing is useful for summarizing Arctic-wide trends, changes in tundra species heights, densities, composition, and distribution can be missed at coarse resolution. Smaller, plot-scale studies are necessary to better understand vegetation dynamics at fine scales occurring on the ground.

In 1995, high-resolution traditional aerial photographs and in-situ measurements of vegetation characteristics were taken at a series of plots established on the Alaskan North Slope. Repeat field surveys in 2021 revealed increases in plant cover for deciduous shrubs and …

The Birds, The Bees, The Trees, And The Breeze: Expanding The Moral Universe Throught Rsk Anlysis, Jared Gibbs

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.

A Renaissance: The Absurd Retelling Of Mostly True Events, Erica R. Hitzman

Graduate Student Theses, Dissertations, & Professional Papers

Throughout the following you will be taken on a fantastical retelling of the exhibition A Renaissance, and some of what lead up to it. Through the eyes of various shifting perspectives you will explore the relationships between the artist, her art, and the viewer in the hopes of unveiling how the work plays into feminist theory, its place in the Zeitgeist, and the motivations behind it. Each perspective is formatted differently, to visually mirror the shift in perspective. Presented in the first person and aligned to the right, the account of the artist discusses the process, emotion, and inspiration behind …

Trading Financial Instruments Like A Video Game: Searching For Profit Using Deep Reinforcement Learning., Sebastian Coombs

Graduate Student Theses, Dissertations, & Professional Papers

Buying and selling Stocks, Foreign Currencies (FOREX), Commodities, and Cryptocurrencies have been a source of wealth generation, and more often, wealth loss for many brave enough to enter the financial markets. In this paper, the author builds on the work of Williams, J. 2022 and develops an agent-based method to solve this wealth generation problem with the use of neural networks. The author points out some assumptions made by Williams, J. 2022 that were sound in theory, but made the implementation of the algorithm presented in their paper diverge from the theory. The author proposes a fundamentally different algorithmic method, …

Accumulation By Dispossession In Protected Areas, A Literatrue Review And Case Study To Create A More Unified Understanding, Leon Russell Miller

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.

Pre-Service To In-Service: An Interpretive Study Of Emergent Multilingual-Focused Field Placements And New Teachers’ Beliefs And Practices, Anya Michelle Muggli

Graduate Student Theses, Dissertations, & Professional Papers

According to the National Center for Education Statistics, over 4.9 million public school students in the United States are emergent multilingual students (also referred to as English language learners or ELLs), and by 2025, it is estimated that one in four U.S. students will be an emergent multilingual student (NCES, 2019). Research on preparing mainstream teachers to effectively work with linguistically and culturally diverse student groups has shown the promise of preservice field experiences with emerging multilingual students; however, little is known about how these experiences impact teachers’ work, especially their practices, particularly in the long term. This interpretive study …

Humanitarian Workers' Perspectives On Mental Health And Resilience Of Refugee Youth: Implications For School Psychology, Diana Maria Diaków

Graduate Student Theses, Dissertations, & Professional Papers

Almost half of the 79.5 million forcibly displaced persons worldwide are youth under the age of 18, including refugees. Refugee youth face deliberate threats across all migration stages including violence, abuse, exploitation, poor living conditions, limited or no access to healthcare and education, interrupted family structure, and discrimination. Noteworthy, school psychologists who practice in host countries face new challenges as these diverse youth enroll in public schools. During the migration stage, humanitarian workers are a primary source of psychosocial and educational support for refugee youth and their families. Therefore, the aim of this research study was to inform school psychology …

Demonstratives In Nsélišcn ‘Montana Salish’, Aspen A. Decker

Graduate Student Theses, Dissertations, & Professional Papers

This thesis presents a detailed analysis of the Nsélišcn ‘Montana Salish’ demonstrative system. I propose that there are three features encoded in the demonstratives that I examined in this thesis: (i) proximity of the speaker in relation to the referent, (ii) common ground between the speaker and addressee, and (iii) visibility of the referent. I further propose that the Nsélišcn demonstrative system distinguishes three degrees of proximity: proximal, medial, and distal. Nsélišcn is a member of the Southern Interior branch of the Salishan language family. The data analyzed in this thesis was collected from native Nsélišcn speakers.

Growing Tiny Plants In Common Environments: Assessing Patterns And Mechanisms Of Drought Response Within Species, Mariah Kathryn Mcintosh

Graduate Student Theses, Dissertations, & Professional Papers

As climate changes and drought frequency and intensity increases, understanding how plants respond will be critical both for predicting potential for adaptation to future climate and for implementing effective ecosystem conservation and management at a time of rapid change. However, gaps in knowledge about the extent to which species vary in key traits across their ranges and the evolutionary and physiological mechanisms which underlie this variation limits both theoretical understanding and effective management. The broad theme of this dissertation is to address within-species variation both to improve understanding of adaptation to future climate and inform ecosystem conservation and management. The …

Preliminary Study In More Effective Utilization Of 87sr/86sr Analysis In The Field Of Forensic Anthropology, Samantha Powers

Graduate Student Theses, Dissertations, & Professional Papers

Isotopic analyses are gaining attention in the field of anthropology. The current utilization of strontium isotopes primarily focuses on residence and migration patterns of past populations extracting data from tooth enamel to indicate early-life residence This study aims to identify a skeletal feature to be set as a field standard in strontium analysis of modern remains when seeking end-of-life residence, the impact of diagenesis on modern remains, and to test the accuracy of the petrous as an alternative to tooth enamel.

The results of this research were unable to suggest such a standard but gathered helpful data to be used …

Y-Chromosome Dna Extraction From Post-Cranial Skeletal Elements, Mykala D. Ward

Graduate Student Theses, Dissertations, & Professional Papers

The use of DNA in forensic science has become an integral tool for victim and perpetrator identifications, missing person’s cases, paternity testing, etc. A major use of DNA is in the identification of unknown deceased individuals. With a reported number of individuals well over 8,000 in the United States, improved methods to accurately collect and analyze DNA from modern human bone are needed.

This project took the preliminary steps to improve DNA sampling and extraction methods by analyzing the Y-chromosome DNA yield from the two bone types. While both types are composed of the same materials, cortical bone is the …