Digital Commons Network^™

Exploring Spatial Climate Analogs For Climate Impact Projection, Adaptation, And Communication, Svetlana Valeryevna Yegorova

Graduate Student Theses, Dissertations, & Professional Papers

Climate change requires that we adapt to the many impacts that are already unavoidable. To adapt, institutions and managers need to be able to anticipate how ecosystems are likely to respond to the observed and projected changes in climate. This dissertation explores spatial climate analogs for projecting climate change exposure and impacts to ecological systems, and for communicating climate impacts to diverse audiences. Chapter 1 summarizes the current state of knowledge about spatial climate analogs, and identifies areas for further research. Chapter 2 compares the skill and impact projections of analog impact models, to that of two commonly used empirical …

A Better Way To Make Protein, James Gillette Bosco

Graduate Student Theses, Dissertations, & Professional Papers

Producing recombinant proteins stands as a cornerstone in both biotechnology and pharmaceutical research, supporting the creation of therapeutics, vaccines, and enzymes used in various industries. Bacterial systems for expression, especially Escherichia coli, are preferred due to their rapid growth rates, ease of genetic manipulation, and scalability. However, generating proteins under current Good Manufacturing Practice (cGMP) standards introduces substantial challenges, such as issues with scalability, toxicity, protein misfolding, and strict regulatory demands. This section delivers an in-depth review of these obstacles and current methods developed to address them. An extensive exploration is conducted into induction techniques, including auto-induction and isopropyl-D-1-thiogalactopyranoside (IPTG) …

Evaluation Of Silk Fibroin And Hylauronic Acid As Otic Drug Delivery System Additives; Investigation Of Silk Fibroins Responses To Enviromental Stimulii, Kolton Charles Sandau

Graduate Student Theses, Dissertations, & Professional Papers

The Serban lab has previously developed and reported on a single application drug delivery system for the treatment of otitis externa. Otitis externa also known as outer ear infections is a very common ailment that impacts large portions of both human and domestic animal populations. Typical treatment for otitis externa typically requires an extended dosing regimen over several days that is inconvenient and can lead to poor clinical outcomes due to poor patient compliance. Our delivery system employs a thixotropic gel to deliver a steady dose of medication over the duration of the infection.

Here we evaluated the reproducibility and …

A Constellation In Training, Marko C. Capoferri

Graduate Student Theses, Dissertations, & Professional Papers

Capoferri, Marko, M.F.A., Fall 2023 Creative Writing - Poetry

Light, Loneliness, and Location

Chairperson: Sean Hill

In many better-known works by the 20^th century painter Edward Hopper, I find a locus of visual concerns that overlay the fixations of the majority—if not all—of the poems that comprise my thesis, what I like to think of as the three L’s: light, loneliness, and location (to which I could also add, as secondary colors, longing and landscape). Additionally, there are what Mark Strand identifies as “two imperatives” in Hopper’s work, “the one that urges us to continue and the other that …

Assessing Data Analytics Readiness: Comparative Analytics Of The Isec And Non-Isec Faculty In Isec Member Universities In China, Han Yu

Graduate Student Theses, Dissertations, & Professional Papers

This study was aimed to investigate differences and predictors of Big Data Analytics (BDA) readiness among teachers in Chinese ISEC member universities participating in internationalization programs (ISEC) and those not. The research highlighted the global demand for data analytics skills and the uneven distribution of talents, noting the understudied nature of data analytics research in education compared to fields like business, medicine, and engineering based on Web of Science data. Emphasis was placed on BDA's crucial role in improving teaching quality and decision-making processes in education. Addressing challenges in implementing data analytics in higher education, the study emphasized factors such …

Density Anomaly Leads To Rift Initiation: Quantifying Active Rifting And Comparison To The East African Rift Zone, Chloe Boucher

Graduate Student Theses, Dissertations, & Professional Papers

Active rifting, elastic failure in the lithosphere from rising density anomalies in the mantle, is fundamental to the Wilson Cycle which describes the cycle of tectonic plates. Active rift zones are common in the oceanic lithosphere but are less common in the thicker continental lithosphere. The current largest active continental rift zone is the East African Rift Zone (EARZ). Although active rifting is fundamental to plate tectonic theory, the mechanics and parameters needed for a density anomaly to initiate a rift have not been undertaken. This model aims to solve the problem of a density anomaly initiating a continental rift …

Where The Framework Ends: Equity Considerations And Limitations During Agency River Permit Allocation Decision Making Processes, Kelsey Ellen Phillips

Graduate Student Theses, Dissertations, & Professional Papers

River recreation in the U.S. increased dramatically in the 1970s as boating technology and recreational skill level shifted, thus a number of federally- and state-managed river areas instituted use limits over the years to prevent the environmental and social impacts perceived to have stemmed from increased use. These river managers were then faced with the task of allocating this use between private and commercial users (allotment) and within these groups (rationing), complicated by the fact that members of the public perceive equity differently. Early recreation use allocation research explored how different rationing techniques favor different groups, for example those with …

Bloom: A Microbial Self-Portrait, Emily Lauren Mulvaney

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.

A Tale Of Two Working Landscapes, Sage C. Sutcliffe

Graduate Student Theses, Dissertations, & Professional Papers

No abstract provided.

A Replicating Rna Vaccine For Crimean-Congo Hemorrhagic Fever Virus Protects Via Non-Neutralizing Anti-Nucleoprotein Antibodies And Trim21, Shanna Star Leventhal

Graduate Student Theses, Dissertations, & Professional Papers

Crimean-Congo Hemorrhagic Fever Virus (CCHFV) is a negative-sense, tick-borne bunyavirus endemic to Europe, Asia, and Africa. CCHFV may cause a severe hemorrhagic disease with a case fatality rate of 5-70% and, to date, there are no widely available or highly efficacious vaccines or therapeutics. Because of its widespread distribution and lack of countermeasures, the WHO has listed CCHFV as a high priority pathogen.

Here, we report a self-replicating, alphavirus-based RNA vaccine that expresses the CCHFV nucleoprotein (repNP) and glycoprotein precursor (repGPC). Initial studies showed that repNP induces high titers of non-neutralizing anti-NP antibodies while repGPC stimulates a robust T-cell response. …

El Pequeño Riego De México: Puebla, Morelos, Y Baja California Sur, José A. Rivera Ph.D.

Faculty Publications

Small to medium-sized irrigation systems in México are characterized in the literature as El Pequeño Riego. Some systems can be compared to those in northern New Mexico and southern Colorado, while others are significantly larger and more complex. Regardless of irrigated acres or hectáreas, however, there are many elements that are commonly shared across these regions. Firstly, the irrigation works are based on the use of acequias dug from the earth that need to be maintained and cleaned season to season. The terms canals and acequias are interchangeable. Secondly, the irrigators themselves, whether called parciantes or regantes, take …

Bird Predation On Coho Salmon (Oncorhynchus Kisutch) In Humboldt Bay, Colton J. Dixon

Cal Poly Humboldt theses and projects

Coho Salmon (Oncorhynchus kisutch) populations along the west coast of the United States are declining. In Humboldt County, located in northwestern California, Coho Salmon have been in decline since their federal listing as threatened in 1997, primarily due to habitat loss from logging, agriculture, and urban development. Although these anthropogenic factors caused salmon populations to decline, bird predation may also be hindering population recovery, as evidenced by the recovery of Passive Integrated Transponder (PIT) tags, originally implanted in Coho Salmon, from bird colonies in Humboldt Bay. This study examines predation by Double-crested Cormorants (Phalacrocorax auritus), Caspian …

Climate Change, Policy Paralysis, And A Nuclear Waste Island? Exploring Perceptions Of Risk, Trust, And Community Agency In Navigating Uncertain Futures Facing Humboldt Bay's Spent Nuclear Fuel Storage Site, Alexander Brown

Cal Poly Humboldt theses and projects

Climate and coastal hazards threaten the long-term viability of indefinite in-situ nuclear waste storage in the U.S., especially at vulnerable “stranded” sites like Humboldt Bay, California. The national policy framework is fundamentally incompatible with emergent climate realities and does not adequately accommodate uncertainty, localized hazard conditions, and the sociocultural and political dynamics that manifest in diverse and contested public arenas. I interviewed 21 community-experts working at the intersection of climate change and nuclear waste, and co-facilitated three scenario planning workshops to gather insights on how to responsibly manage Humboldt Bay’s nuclear waste in a climate-altered world. Qualitative findings indicate variation …

Two-Dimensional Hydrodynamic Model Comparison For Fish Habitat Assessment In Rivers, Tyler Caseltine

Cal Poly Humboldt theses and projects

Accurate prediction of aquatic habitat availability for salmonids and other aquatic species is crucial for effective river and tributary restoration and management. Two-dimensional (2D) hydrodynamic models have become the standard for simulating depth and velocity conditions in open channel systems, leveraging advances in computational capabilities and spatial data collection. This study compares four 2D hydrodynamic models—SToRM, River2D, HECRAS2D, and SRH2D—using consistent topographic and calibration data, and adhering to Quality Assurance and Quality Control (QA/QC) standards as outlined by the US Fish and Wildlife Service (USFWS) and McBain Associates. The models were evaluated with data from two study sites for their …

Barn Owls Exert Top-Down Effects On The Abundance And Behavior Of Rodent Pests, Katherine C. Larson

Cal Poly Humboldt theses and projects

Predators can exert top-down effects on their prey by direct consumption, by imposing risk of predation, or a combination of both. However, empirical evidence for these effects is mixed and inconsistent. Barn owls in agriculture present a system with attributes that should, according to theory, lead to strong top-down effects, but research is limited and the distinction between effects on prey abundance and behavior remains unresolved. Understanding the top-down effect of predators on pests is a cornerstone of integrated pest management and important where barn owls may contribute to the control of rodents on farms. Vegetation can mediate the top-down …

Analyzing Stakeholder Perceptions On Biogas Production Incentives Under California’S Low Carbon Fuel Standard, Emily Read

Cal Poly Humboldt theses and projects

Accounting for more than half of California’s methane emissions, the dairy and livestock sector has become a central focus for the state’s emission reduction efforts. As a leader in climate policy, California’s approach to addressing agricultural methane emissions has the potential to shape the future of livestock agriculture on a national and global scale. The state has prioritized anaerobic digesters as the primary strategy for addressing livestock methane, a decision that has been both widely contested and strongly supported by stakeholders. This thesis investigates stakeholder perceptions on livestock biogas under California’s Low Carbon Fuel Standard (LCFS) using interview and survey …

Mouralherwaqh Coastal Wetland Road Crossing Da'luk, Romel Robinson Ii

Cal Poly Humboldt theses and projects

The integration of Indigenous and Western science plays an essential role in Tribally led collaborations for land management. This process of woven sciences is rooted in reciprocal relations and partnerships guided by Tribal Nations. Our cohort was invited by Wiyot Tribal Representatives to investigate a culvert located within the wetlands of Mouralherwaqh— a parcel of land reacquired by the Wiyot Tribe in 2022. This document seeks to share our experience and analysis as part of the Wiyot Tribe’s broader journey in navigating ecocultural restoration projects within Mouralherwaqh. The four community interests we investigated for the wetland crossing included a resized …

Mouralherwaqh Coastal Wetland Road Crossing Da'luk, Pakunihanich Nicoli Martin

Cal Poly Humboldt theses and projects

The integration of Indigenous and Western science plays an essential role in Tribally led collaborations for land management. This process of woven sciences is rooted in reciprocal relations and partnerships guided by Tribal Nations. Our cohort was invited by Wiyot Tribal Representatives to investigate a culvert located within the wetlands of Mouralherwaqh— a parcel of land reacquired by the Wiyot Tribe in 2022. This document seeks to share our experience and analysis as part of the Wiyot Tribe’s broader journey in navigating ecocultural restoration projects within Mouralherwaqh. The four community interests we investigated for the wetland crossing included a resized …

Comparing Alternative Developmental Modes: Structure And Gene Expression In The Olfactory System Of Plethodontid Salamanders, Giuseppina S. Lanzilli

Cal Poly Humboldt theses and projects

The olfactory system of extant amphibians changes as the animal transitions from a fully aquatic to a terrestrial lifestyle at metamorphosis. Cellular morphology of the nose and expression patterns of olfactory genes in the nasal cavity have been examined for a variety of frogs and salamanders, but among plethodontid salamanders, molecular data are available only for Plethodon shermani. Using standard histology and micro-CT reconstruction, I investigated the structure of the olfactory organs of larvae, juveniles, and adults of six plethodontid species, with terrestrial, streamside, semiaquatic, and aquatic adults. The overall structure of the olfactory cavity was generally similar across …

"They Are Expecting Us To Stay Strong": How Ambulance Personnel Navigate And Manage Their Emotions In A Rural Region Of Northern California, Tina M. Orton-Owens

Cal Poly Humboldt theses and projects

This research examines how emergency medical service (EMS) workers navigate and manage their calls in Humboldt County, a rural region of Northern California. The primary theoretical framework is drawn from Arlie Hochschild’s theory of Emotional Labor. This paper examines how emotional labor impacts EMS workers within a rural environment and with limited resources. I also look at how COVID-19 complicated EMS workers’ experiences. This paper is based on qualitative research where I conducted 13 mostly face-to-face interviews with EMS workers throughout the County between 2020 and 2022. Interviews consisted of 30 questions and interviews ranged in length from 1 to …

Fire Severity Mediates Marten And Fisher Occurrence: Impacts Of The Dixie Fire On A Carnivore Community, Christopher James Collier

Cal Poly Humboldt theses and projects

The consumption of an astounding one million acres resulted from California’s largest single fire to date, the 2021 Dixie Fire. The social and economic losses associated with the fire were immediately apparent, but the effects on wildlife remained unknown. While previous research has suggested mixed or low severity fire may be beneficial to certain wildlife species, the responses to megafires are poorly understood for many carnivores. To better understand these responses to severe fire, I used a random sampling design stratified by burn severity to survey in and around the Dixie Fire footprint using baited camera stations. This allowed me …

The "Upside-Down" River: Trends In Total Nitrogen, Total Phosphorus, And Microcystin Concentration In The Klamath Basin, 2010-2021, Kayla M. Fitzpatrick

Cal Poly Humboldt theses and projects

The Klamath River tends to experience impaired upstream water quality, which improves downstream. Although this consensus is accepted, an updated spatiotemporal analysis of certain water quality parameters has not been conducted since 2017. With four of the Klamath River’s dams slated for removal by the end of 2024, it is critical to have an updated assessment of current water quality conditions from which to compare conditions following dam removal. In this study, total nitrogen (TN), total phosphorus (TP), and microcystin data from 2010-2021 were analyzed to determine concentration trends from Link Dam to the Klamath River Estuary.

Concentrations of TN …

Analyzing Science Classroom Design Ideas Of High School Students: Variations Amongst Lgbt-Identifying Students, Abraham A. Lewis

Cal Poly Humboldt theses and projects

The physical design of science classrooms is a leading factor in determining the uses of the classroom and the comfort and engagement of students in the classroom, and if a science classroom is designed with only the majority of students or the average student in mind, the classroom design may have a negative impact on the comfort, engagement, and perceptions of minority groups of students, such as queer students. The purpose of this research is to identify how a science classroom’s design impacts the perceptions, engagement, and comfort of queer students, and to use student suggestions to identify science classroom …

Dynamic Modeling And Control Of A Solid State Semiconductor-Based Transformer, Microgrid And Storage Systems, Rubén Darío Viñán-Velasco

Department of Electrical and Computer Engineering: Dissertations, Theses, and Student Research

Smart Grids are power grid models designed with the idea of including the growing new technologies, from generation to storage devices, and are a response to the growing demands from consumers and the presence of electronic components being commonplace in the modern devices. The design requires a dynamic alternative in order to build an independent grid that can also work in cooperation with other micro-grids and the power grid in an integrated way. Smart-grids present several advantages over the traditional power grid scheme, but the economic costs of the components required to implement smart-grids is currently a great limitation. This …

Student Interaction With Generative Ai: An Exploration Of An Emergent Information-Search Process, Ryan M. Schuetzler, Justin Scott Giboney, Taylor M. Wells, Benjamin Richardson, Tom Meservy, Cole Sutton, Clay Posey, Jacob Steffen, Amanda Lee Hughes

Faculty Publications

ChatGPT, a generative artificial intelligence, is one of the fastest-adopted tools in history and has quickly become a valued tool in education. This study seeks to understand how generative artificial intelligence has changed the information search process. We collected prompts submitted to ChatGPT and thoughts about ChatGPT responses through a survey of 455 students at a US university. Using thematic analysis, we identified ways that ChatGPT changes the information search process of students by supporting diverse information needs, allowing cycling of prompt adjustments, and promoting easy adoption of results.

Cell-Type-Specific Consolidation Of Learned Motor Memories In The Neocortex, Rebecca Dicicco

Harriet L Wilkes Honors College Theses 2020 - Present

Motor learning is crucial for diverse behaviors, yet the neural mechanisms that consolidate the learning remain poorly understood. A recent study (Majumder et al., 2023) found that inhibiting Calcium/calmodulin-dependent protein kinase II (CaMKII) in pyramidal tract (PT) neurons, but not Intratelencephalic (IT) neurons, in the Anterior Lateral Motor cortex (ALM) disrupt motor learning. This suggests a cell-type-specific reliance on CaMKII for inducing synaptic plasticity during motor skill acquisition. This project aims to explore how the brain consolidates the acquired motor skill as a long-term memory. We hypothesize that following motor learning, CaMKII in PT, but not IT, cells activates the …

“Biological Warfare: Can A War Be Justly Fought Using Biological Weapons?”, Gabrielle Emilio Fagundes

Harriet L Wilkes Honors College Theses 2020 - Present

Biological agents and toxins have been used as weapons offensively as early as 1320 BCE. Modern ability to manipulate and control biological materials has raised concerns as to how wars will be fought in the future. The Geneva Protocol of 1925 and the subsequent Geneva Conventions have clearly determined biological warfare as unethical and illegal due to the devastating effects it has on both combatants and noncombatants. The International Humanitarian Laws, based on the fourth Geneva Convention, are used as guidelines for fighting just and legal wars. Although the use of biological weaponry has been banned for almost a century, …

Genetic Doping, Enhancement, And Therapy: An Ethical Analysis In The Context Of Competitive Sport, Damon Farrell

Harriet L Wilkes Honors College Theses 2020 - Present

In the realm of sports, a domain characterized by skill, competition, and entertainment, the consensus stands firm—cheating is unequivocally wrong. Violations extend beyond the traditional realm of illicit substances like stimulants and steroids to encompass emerging technological advancements, notably gene doping. Gene doping involves the utilization of genetic-altering technology to augment human performance, introducing a new dimension to the ethical discourse surrounding sports. Despite its designation as a banned practice by numerous sports agencies, there are scenarios where the deployment of this technology warrants consideration and even ethical approval. This analysis delves into the prospects of gene doping, elucidates fundamental …

Elyrion's Harmony: A 2d Video Game, Jovan Fuller

Harriet L Wilkes Honors College Theses 2020 - Present

Elyrion's Harmony' is a 2D side-scrolling game in the fantasy genre. It takes place on the planet Elyrion. Elyrion is home to multiple countries, including Earth, Water, Air, and Fire. The player plays as Lyra, a citizen of Earth who witnesses her village's destruction by the malevolent sorcerer, Malachor. Seeking to tear the world asunder, Malachor's chaos disrupts the once-harmonious planet. As Lyra, players navigate diverse landscapes and battle elemental challenges to save her world.

Precarious Gardening: The Influence Of Victory Gardens In Wwii And Their Relevance With Marketing Sustainable Practices Today, Katherine Mali Hanner

Harriet L Wilkes Honors College Theses 2020 - Present

This thesis explores the concept of precarity in relation to sustainability efforts within the United States through a comparison of victory gardens during World War II and the contemporary garden movement in the twenty-first century. Victory gardens were used as a means to promote civilian action in war efforts to supplement food rationing and contemporary gardening has encouraged the average homeowner to grow backyard gardens in the name of sustainability. Both demonstrate how the marketing strategies during perceived crises have utilized precarity rather than progress to propel action among the common man. While some tactics employed then still remain useful …