Index Catalog // Hyrax

“Red Light, Yellow Light!”: Evaluating the Anti-Listerial Potential of Bacillus Isolate Metabolites Using a High-Throughput Chromogenic Assay”

Creatore:: Johnson, Taylor S.
Abstract:: Listeria monocytogenes contamination continues to pose challenges for the food industry and there is demand for effective methods of food preservation and protection that can also be considered clean label. A promising source of antilisterial compounds may be sourced from bacteria that produce novel byproducts. Ribosomally synthesized and post-translationally modified...
Resource Type:: Masters Thesis

Comparing and Contrasting the Merits of Additive Manufactured Electric Vehicle Suspension Components: GFR Case Study

Creatore:: Peraza-Garcia, Jesus
Abstract:: This thesis compares the implementation of additive manufactured suspension uprights against subtractive manufactured suspension uprights from concept generation, design, and validation through simulation. Additive manufactured suspension uprights were designed for Global Formula Racing’s 2023 electric vehicle. Utilizing Siemens NX, Nastran, Fusion 360, and Ansys Workbench both subtractive and additive manufactured...
Resource Type:: Masters Thesis

Purification of cyclotron-produced 89Zr for its use in diagnostic radiopharmaceutical labeling

Creatore:: Knaus, Clinton W.
Abstract:: Production of 89Zr serves as a crucial preliminary step for exploring Zr-chelates, determining their stability constants, and advancing radiolabeling methodologies for monoclonal antibody based theranostics. 89Zr is typically produced by the irradiation of natural yttrium targets, a process extensively documented in scientific literature. Two primary methods are employed: the 89Y(p,n)89Zr...
Resource Type:: Capstone Project

Investigating Time-Digital-Converters for Hardware Security in FPGAs

Creatore:: Lytikov, Daniil
Abstract:: In this comprehensive thesis, we present a series of experiments and findings that highlight the critical importance of TDC Voltage Sensors in the hardware security domain. Our research begins by introducing a novel self-calibrating module, demonstrating its efficiency through preliminary calibration tests. We then delve into the Peak-to-Peak tests, which...
Resource Type:: Masters Thesis

Bonds Across Divides: Track III Diplomacy in Environmental Peacebuilding Projects A case study of EcoPeace Middle East in the Jordan Basin

Creatore:: Mathieu, Laura J.
Abstract:: This research explores the mechanisms of Track III diplomacy employed by EcoPeace Middle East, in the context of environmental peacebuilding within the Jordan Basin region. Focusing on how these mechanisms contribute to improving water quality and quantity, the study delves into their processes in facilitating cooperation among conflicting parties—Israelis, Palestinians,...
Resource Type:: Masters Thesis

Internalized Racism and Depression: The Moderating Role of Racial Idenitity

Creatore:: Mitchell, Jazlyn M.
Abstract:: The current study aimed to further explore the relationship between internalized racism and depression, using racial identity (centrality) as a moderator. The current study was guided by two hypotheses. First, it was hypothesized that internalized racism would predict depression. Second, it was hypothesized that racial identity (centrality) would moderate the...
Resource Type:: Masters Thesis

Exploring the Anaerobic Co-digestion of Food Waste, Brewery Waste, and Fats, Oils, and Greases through Biomethane Potential Testing and Response Surface Methodology

Creatore:: Liberman, Madalyn R.
Abstract:: Food waste (FW), brewery waste (BW), and fats, oils, and greases (FOG), are prevalent waste streams in municipalities across the country, particularly in the Pacific Northwest (PNW). Anaerobic digestion (AD), the microbial-mediated transformation of organic waste into methane-rich biogas, offers a sustainable, energy-generating, waste management solution for these wastes. Anaerobic...
Resource Type:: Masters Thesis

Terrain-Aware Probabilistic Search Planning for Unmanned Aerial Vehicles

Creatore:: Schomer, Nathan L.
Abstract:: Mountain search and rescue is a vital form of emergency response to assist people in austere environments (e.g., extreme terrain, poor weather). Volunteer mountain search and rescue teams in the United States have begun adopting consumer- grade unmanned aerial vehicles to assist a variety of tasks (e.g., search, resource delivery);...
Resource Type:: Masters Thesis

Intraseasonal Oscillations of ~20 days Revisited: The Jet Stream and its Ecological Implications along the Oregon Coast

Creatore:: Herweck, Kendra
Abstract:: Intraseasonal oscillations in the atmosphere-ocean system can affect weather patterns and regional ecosystems. In turn, these oscillations can be affected by climate variability, resulting in additive and/or non-linear responses of regional ecosystems to climate forcing. In the Northern California Current, a strong correlation was identified between the location of the...
Resource Type:: Masters Thesis

Life History of the Northern Rubber Boa (Charina bottae) in Oregon

Creatore:: Leppin, Mark V.
Abstract:: The Northern Rubber Boa (Charina bottae) is a small, secretive boa native to the Pacific Northwest. Despite this being possibly the highest latitude boas and one of only two boas native to the continental U.S., it has received surprisingly little attention. Most of the research on the natural history of...
Resource Type:: Masters Thesis

Does the Source of the Conflict Impact the Effectiveness of River Basin Organizations?

Creatore:: Kakhramonov, Vokhidjon
Abstract:: The success or failure of river basin organization (RBO), when they deal with disputes, might rely on the source of conflict along with other factors such as institutional design, legal attributes and conflict resolution mechanism of the organization. However, little attention has been paid to the research which studies a...
Resource Type:: Masters Thesis

Molded Fiber Bottle Coatings for Environmental Resistance and Sustainability

Creatore:: Sim, Elaine
Abstract:: In recent years, non-renewable and non-biodegradable plastic packaging forms the majority of landfilled waste. These products, mainly made from Polyethylene Tetraphlatate (PET) and other polyolefins, have excellent durability and barrier properties, but take hundreds of years to degrade. Much focus has been put on developing environmentally friendly alternatives to polyolefins...
Resource Type:: Masters Thesis

Cannabidiol Effects on NMDA and AMPA Receptor Activity and Cognitive Function at a High Dose in 5xFAD Mice

Creatore:: Sackinger, Emily P.
Abstract:: Alzheimer’s Disease (AD) is an abnormal part of aging that mainly affects those over the age of 65. The current therapies are only FDA approved for mild to moderate AD symptoms. Cannabidiol (CBD) is a non-intoxicating constituent of Cannabis sativa that has been shown to have beneficial effects on cancer,...
Resource Type:: Masters Thesis

Diving into Diversity: Fish Populations and Climate Resilience in an Endorheic Basin

Creatore:: Dew, Aleah
Abstract:: The Goose Lake Basin, situated on the border of Oregon and California, USA, faces significant challenges from drought, wildfire, and other environmental stressors. This region hosts numerous endemic fish species such as the Goose Lake redband trout (Oncorhynchus mykiss newberri), Goose Lake lamprey (Entosphenus sp.), Goose Lake tui chub (Siphateles...
Resource Type:: Masters Thesis

Lamprey of the Goose Lake Basin: A Multi-Scale Habitat & Distribution Analysis

Creatore:: Dickey, Jacob C.
Abstract:: Two ecologically important lamprey species found in the endorheic Goose Lake Basin face conservation threats; however, relatively little is known about their habitat needs or spatial distribution. Lamprey and their habitat are often found to be patchy; to evaluate these relationships for the lamprey in this basin, I utilized a...
Resource Type:: Masters Thesis

The Examination of Escherichia coli Contamination via Agricultural Water Applications and Survival During Pre-Harvest Field Curing of Dry Bulb Onions

Creatore:: Racine, Jason R.
Abstract:: 2020 and 2021 brought the first reported outbreaks of salmonellosis epidemiologically linked to dry bulb onions in the United States. Outbreak investigations were not able to implicate a specific source of the contamination but speculated that contaminated water was a significant contributor. The Produce Safety Rule established minimum standards for...
Resource Type:: Masters Thesis

Laboratory Observations of Tsunami-Driven Debris Damming with Comparison to ASCE 7-22 Minimum Design Loads

Creatore:: Doyle, Kellen C.
Abstract:: Tsunami inundation of coastal communities can impose a wide array of forces on the built environment. Forces generated by tsunami-driven debris damming have the potential to cause failure of coastal structures and further accumulate flow-entrained debris. Since tsunami-resilient design standards were adopted by ASCE in 2016, debris damming considerations have...
Resource Type:: Masters Thesis

The role of international water treaties in mitigating the transboundary negative environmental and social impacts of dams

Creatore:: Idris, Hussam
Abstract:: Given the recent attention to dams in developing countries as a means to efficiently utilize water resources, mitigating the negative environmental and social impacts they have on riparian states is of utmost importance. This thesis presents a global review of how basin countries, through international water treaties (IWT), ensure that...
Resource Type:: Masters Thesis

Optimizing the Membrane Architecture and Interrogating the Stability of Hybrid Lipid-coated Gold Nanoparticles for Biological Studies and Applications

Creatore:: Kmetz-Gonzalez, Gemma
Abstract:: Nanoparticles are a hugely diverse category of material that have a wide variety of biomedical applications, and developing tools for biological research with high cellular uptake is critical to their effective application. However, rarely is attention paid to the exact mechanism by which this is occurring, with most studies focusing...
Resource Type:: Capstone Project

Structure-Property Relationships of Supported Palladium and Rhenium Oxide for the Alkane Rearrangement of Hydrocarbons and Deconstruction of Polyethylene via Tandem Dehydrogenation and Olefin Metathesis

Creatore:: Moore, Selena C.
Abstract:: The rapid accumulation of plastic waste in landfill, waterways and oceans is becoming a critical problem, one that current recycling technologies are not capable of solving. Recent proposed approaches in the depolymerization of waste plastics employ an Olefin-Intermediate Process (OIP), where feedstocks like polyolefin plastics are ‘activated,’ producing an olefin...
Resource Type:: Masters Thesis

Evaluating the Potential of Protein Supplements and Probiotics for Improving Honey Bee Health and Understanding Honey Bee Behaviors Related to Social Immunity

Creatore:: Chapkin, Elissa R.
Abstract:: Managed honey bees (Apis mellifera) play a vital role in pollinating cultivated crops worldwide. Honey bee colony declines reported in the past two decades have been associated with stressors such as pests and diseases, pesticide exposure, and poor nutrition. In the wake of these colony declines, beekeepers have strived to...
Resource Type:: Masters Thesis

Student Club Analysis: The Effects of Organizational Structuring on Competition Performance

Creatore:: Chandler, Jacob J.
Abstract:: This thesis aims to explore the effects of organizational and management principles within the context of a student club – an international Formula Student team. Research on the effects of organizational structuring on student club performance tends to be qualitative in nature. While considering the inherent complexity of the human...
Resource Type:: Masters Thesis

Removing Residual Lane Markings to Reduce Driver Confusion

Creatore:: Weber, Jane B.
Abstract:: When pavement markings on roadways are removed, scarring can occur leaving behind traces of where the marking used to be called ghost lines. These ghost lines can confuse drivers on the roadway and divert their attention from the correct lane markings leading them into the false lane. Previous research has...
Resource Type:: Masters Thesis

Spatiotemporal Variability in Benthic-Pelagic Coupling on the Oregon-Washington Shelf: An Investigation of Bottom Water and Benthic Flux Data

Creatore:: Hughes, Anna R.
Abstract:: Continental shelf sediments are sinks for dissolved oxygen and sources of many major and minor nutrients required for oceanic surface primary production, resulting in a strong coupling between benthic and pelagic biogeochemical cycling. However, the influence and spatiotemporal variability of benthic remineralization on bottom-water chemistry and the supply of nutrients...
Resource Type:: Masters Thesis

Methods of taste testing

Creatore:: App, Jean
Resource Type:: Capstone Project

Enhancing Facial Recognition: A Comparative Analysis of Image Preprocessing Techniques in PCA, KL Expansion and SVD

Creatore:: Tuffour, Prince A.
Abstract:: Facial recognition has become increasingly important in recent years, due to the wide range of applications it has in fields such as security, surveillance, and human-computer interaction. Three popular methods for facial recognition are the Principal Component Analysis (PCA), Karhunen-Loeve Expansions, which is fundamentally a continuous form of PCA but...
Resource Type:: Capstone Project

Roles of microorganisms in the deterioriation of rockfish

Creatore:: Lobben, J. C. and Lee, J. S.
Abstract:: Seven species of microorganisms indigenous to fish were inoculated into sterile fish muscle, obtained from Sebastodes alutus and Sebastalobus alascanus, and the production of total volatile acids (TVA) and total volatile bases (TVB) was determined during storage at 1 C. No production of TVA and TVB was noted in sterile...
Resource Type:: Capstone Project

On a Topological Criterion for the Construction of Higher Arity Metrics

Creatore:: Barkan, Willow
Abstract:: Metric spaces (X, d) are ubiquitous objects in mathematics and computer science that are able to capture pairwise distance relationships d(x, y) between points x, y ∈ X. Because of this, it is natural to ask what useful generalizations there are of metric spaces for capturing “k-wise distance relationships” d(x1,...
Resource Type:: Masters Thesis

Gas chromatographic identification of chlorinated insecticides based on their U.V. degradation

Creatore:: Banks, K. A. and Bills, D. D.
Abstract:: Certain chlorinated insecticides can be identified by electron capture gas-liquid chromatographic (EC-GLC) analysis of the prepared sample before and after treatment with ultraviolet irradiation, Upon U.V. treatment, characteristic degradation products arise from the insecticides investigated. Comparison of the degradation pattern obtained by EC-GLC of unknown and authentic insecticides provides an...
Resource Type:: Capstone Project

Teacher-Child Relationships and Preschool Teachers’ Attributions: Relations with Preschool Children’s Emotion Regulation and Emotion Knowledge

Creatore:: Johnson, Maya E.
Abstract:: Emotional understanding is important for social connection and fulfilling relationships across the lifespan. Without these skills, relationships with others can feel chaotic, unpredictable, and unattainable, affecting a person’s health and well being. Early childhood is a critical time to learn and practice foundational emotional skills that build into skills needed...
Resource Type:: Masters Thesis

Organic Pelletized Chicken Manure Application Rates and Effects on Novel Asian Vegetables in the Willamette Valley

Creatore:: Velazquez, Hannah D.
Abstract:: Daikon, mizuna, mizspoona, and komatsuna are novel Asian vegetables for which a market exists in Oregon, especially in the organic sector. However, these crops are currently not grown widely in the area, despite the favorable growing environment of Oregon’s Willamette Valley. Little is known about the appropriate application level of...
Resource Type:: Masters Thesis

Mitigating Wildfire Impacts on Mobility Using GIS, Fire Modeling, and Operations Simulation

Creatore:: Al-Hamadani, Saifaldawlah
Abstract:: Wildfires are a recurring disaster that threatens communities living close to forests and result in significant financial losses along with negative environmental effects, especially with the increase of wildfire season length and intensity due to climate change and increasing urbanization. Wildfire events can also have a significant impact on the...
Resource Type:: Masters Thesis

Weighing the Benefits of Returning Fire to the Landscape: Strategic Fire Management Workloads

Creatore:: Goodwin, Ian
Abstract:: The accumulation of fuels in fire prone landscapes, and changing climatic conditions, have resulted in increasingly volatile fire behaviors. As a result, social and operational risk, management expenditures, and budgetary requirements for responsible agencies are increasing. The United States Forest Service (USFS) manages 193 million acres across the United States...
Resource Type:: Masters Thesis

Classification Modeling of Nuclear Power Plant Outage Severities with Complement Naïve Bayes and Bidirectional Encoder Representations from Transformers

Creatore:: Castillo, Michael A.
Abstract:: Low-level nuclear power plant outages in the United States can lead to unanticipated costs, potentially compromising the expected operation lifetime of the plant. Nuclear power plants are complex systems of interfacing components and highly regulated processes. This inherent complexity makes predicting outages from system dependencies very challenging. When outages do...
Resource Type:: Masters Thesis

Exploring the Ductility Minimum of Niobium C103 at Intermediate Temperatures using Triaxial Tensile Specimens

Creatore:: Wood, Thomas N., II
Abstract:: This work explores the mechanical properties of single-phase niobium alloy C103 from room temperature to 600°C for the purpose of expanding safe uses of the material into new applications. The study utilizes a symmetrically notched triaxial tensile specimens to manipulate the internal stress field in order to observe the changes...
Resource Type:: Masters Thesis

A Numerical Investigation into Capillary-Wrapped Liquid Sodium Pin-Bundles for Instrumentation Development

Creatore:: Vietz, Stefan
Abstract:: Liquid sodium is a challenging fluid to perform verification and validation for. Its chemical reactivity, large thermal conductivity, and opacity make both modeling and experimental data gathering difficult. Converting the wire wraps of liquid sodium reactor fuel pin geometry into capillaries, and inserting fiber optic temperature sensors, promises to capture...
Resource Type:: Masters Thesis

Linkages Between Domestic Water Politics and Foreign Water Policy in Kyrgyzstan

Creatore:: Dairova, Zhamilia
Abstract:: Although newly independent Central Asian states in 1991, including Kyrgyzstan, started developing their own foreign water policies, Kyrgyzstan’s independence period demonstrated the challenges of determining foreign water policy independently. The conceptual framework of a two-level game was applied in the study to understand and answer the question about how domestic...
Resource Type:: Masters Thesis

Improving User Mental Models of XAI Systems with Inclusive Design Approaches

Creatore:: Hamid, Md Montaser
Abstract:: Explainable Artificial Intelligence (XAI) systems aim to improve users’ understanding of AI but rarely consider the inclusivity aspects of XAI. Without inclusive approaches, improving explanations might not work well for everyone. This study investigates leveraging users’ diverse problem-solving styles as an inclusive strategy to fix an XAI prototype, with the...
Resource Type:: Masters Thesis

Effect of Audible Static on Blood Pressure Measurement by Doppler Ultrasound Sphygmomanometry in Cats

Creatore:: Uematsu, Sayaka
Abstract:: Systemic hypertension, a persistent elevation in systemic arterial blood pressure (BP), is a well-recognized disorder in cats. Failing to diagnose it accurately could lead to organ damage or unnecessary lifelong therapy. Doppler ultrasonic flow detectors are commonly used for indirect BP measurements in cats. However, whether the audible static from...
Resource Type:: Masters Thesis

Evaluating Alternative Soil Amendments for Organic Northern Highbush Blueberry Cultivation in Sub-Optimal Soils

Creatore:: Retano, Andrea
Abstract:: Escalating demand for organic blueberries has driven a significant expansion of northern highbush blueberry (NHB; Vaccinium corymbosum L.) production area. This expansion is particularly pronounced in regions of the Pacific Northwest where native soil conditions are sub-optimal for NHB, notably east of the Cascade Mountain Range of Oregon and Washington,...
Resource Type:: Masters Thesis

Engineering Student Perspectives of a New Required Programming Course

Creatore:: Garcia Ramirez, Jessica
Abstract:: We present student perceptions of a new first-year engineering programming class that was designed by informed research practices. While the College of Engineering at Oregon State University saw a lot of major switching in the first year, there were not many students switching into computer science (CS). This could have...
Resource Type:: Masters Thesis

Consequences of Influenza A Virus on Pneumococcal Biofilm Formation and Stability in the Absence of Host Factors

Creatore:: Nutter, Laura
Abstract:: Streptococcus pneumoniae and Influenza A Virus both primarily infect the upper respiratory tract, with more severe disease occurring during coinfection than would be caused by either pathogen independently. Until recently, characterization of the interactions between these two pathogens has occurred exclusively in the context of a host or using host-derived...
Resource Type:: Masters Thesis

Operation of a High-Temperature Oxidation Reactor for Thermochemical Energy Storage

Creatore:: Ramsey, Owen C.
Abstract:: The cost of long-duration energy storage poses one of the most significant limitations on the penetration of renewables into power grids. Thermochemical energy storage has great potential to reduce this cost through the use of a reversible redox reaction pair that has a high enthalpy of reaction. The chemical nature...
Resource Type:: Masters Thesis

Modifications to Rearing Environments as a Method for Reducing Domestication Selection in Hatchery-reared Steelhead (Oncorhynchus mykiss)

Creatore:: Obley, Miriam
Abstract:: Since the decline of salmonid populations in the Pacific Northwest, supplementation programs have become frequently implemented by hatcheries as a way to protect and conserve wild stock. However, hatchery-reared fish have lower fitness than wild fish which is likely due to adaptation to the hatchery environment, i.e., domestication selection. Fish...
Resource Type:: Masters Thesis

The Impact of Surface Ocean Mixing on Phytoplankton Communities and Associated Carbon Pools

Creatore:: VerWey, Brian J.
Abstract:: Deep mixing events in the ocean’s surface layer act as physical drivers of carbon export by detraining dissolved and particulate organic matter, including surface phytoplankton communities, to depth. Once removed from the sunlit surface ocean environment, phytoplankton accumulation rates are dependent on the relative contributions of loss processes, such as...
Resource Type:: Masters Thesis

Evaluation of system-level performance of closed thermochemical energy storage systems for space heating

Creatore:: Rivera, Kate E.
Abstract:: This study evaluates the system efficiency and energy-offsetting capabilities of a closed-cycle thermochemical energy storage (TCES) system. Current TCES research primarily focuses on material selection and reactor design but overlooks the practical limitations faced on a system level. Thus, this study investigates various TCES integration methods for providing building space...
Resource Type:: Masters Thesis

Insight into Western Stemmed Tradition cultural patterns based on analysis of Pit Feature 95 at the Cooper's Ferry Site (10IH73), Idaho

Creatore:: McPherson, Gabrielle
Abstract:: Excavations at the Cooper’s Ferry site (10IH73) revealed a long record of repeated human occupation extending from the late Pleistocene into the early Holocene (~16,000-10,000 cal BP) and have yielded unique insights into the Western Stemmed Tradition (WST), which includes. Several studies have focused on WST pit features encountered at...
Resource Type:: Masters Thesis

Development and Evaluation of a Static Land-Based Aquaculture System for Pacific Dulse (Devaleraea mollis): Environmental and Nutrient Requirements

Creatore:: Chatfield, Marcus W.
Abstract:: Devaleraea mollis (Pacific Dulse) is becoming a popular food for human consumption. Previously, Pacific Dulse has been used as a nutrient source for cultured abalone species, with some historical food use by indigenous peoples, while the closely related Atlantic dulse (Palmaria palmata) has a long-documented history of use in cuisine...
Resource Type:: Masters Thesis

Exploring Vulnerability and Scarcity of Groundwater Resources in Quintana Roo, Mexico

Creatore:: Iglesias Thome, Maria Jose
Abstract:: This study examined water scarcity and vulnerability in Quintana Roo, along the northern Caribbean coast of Mexico where rapid growth of tourism in the past 40 years has limited the ability of rural and urban communities to obtain safe, reliable, and equitable access to water services and critical water infrastructure...
Resource Type:: Masters Thesis

The Impact of Overlapping Forest Disturbance Across a Stream Network in Western Oregon: Harvesting, Wildfire and Post-Fire Management Effects on Stream Water Nitrate and Riparian Soil Nutrients

Creatore:: McCredie, Katherine E.
Abstract:: Understanding the magnitude and longevity of wildfire effects in forested watersheds and subsequent impacts to downstream aquatic ecosystems and communities requires congruent investigation into post-fire aquatic and terrestrial processes. However, results from wildfire studies are often confounded by pre- and post-fire land management actions and based on either hydrologic or...
Resource Type:: Masters Thesis

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