Digital Commons Network^™

Electromagnetic Enhancement Of A Potassium-Seeded Rotating Detonation Engine, Anthony Joseph Presto Jr.

Master's Theses

Rotating detonation engines offer a route to pressure-gain combustion by sustaining one or more detonation waves in an annular chamber supplied by continuous propellant injection. This thesis evaluates whether potassium seeding can make the high-temperature product flow of a hydrogen–air rotating detonation engine conductive enough to serve as the working fluid for magnetohydrodynamic acceleration. To the author’s best knowledge, the complete configuration modeled here has not been reported previously in open literature. This configuration consists of a hydrogen–air RDE with KOH-based potassium seeding, local conductivity estimates, and imposed Lorentz-force acceleration. The thesis therefore develops an initial computational model for this …

Prompt-Driven Tabletop Robotic Manipulation With A Structured Llm Interface And Visual Verification, Tomas Franco

Master's Theses

Creating a tabletop robotic manipulation system that connects language goals to robot actions is a challenging problem. Large language models can interpret mission objectives and reason through actions, but when placed directly in control of hardware they can produce hallucinated commands that result in unsafe behavior without the proper safeguards.

This thesis presents a constrained LLM-guided manipulation system built around the Quanser Qarm, a four degree of freedom manipulator with a mounted Realsense RGB-D camera and a gripper with readable current. Every decision made by the LLM planner is routed through a gated command interface that restricts the model to …

Sentinel: Evaluating Occlusion-Centered Next-Best-View Selection Using Rgb-Derived Pseudo-Geometry, Paul Nassar

Master's Theses

Three-dimensional cameras provide direct geometric measurements, but their cost, weight, power requirements, and calibration constraints can limit their use in various lightweight or large-scale sensing systems. A potential alternative is to use conventional two-dimensional RGB cameras together with geometric reconstruction models that infer a partial three-dimensional representation from images. This thesis evaluates that possibility for next-best-view (NBV) selection through Sentinel, an occlusion-centered system for static, object-centric scenes with known camera poses and intrinsics. Sentinel converts source RGB observations into pseudo-geometry using monocular depth or point-map predictions, combines those predictions with camera-ray evidence, identifies occluded unknown regions, and selects a candidate …

The Effect Of Specialty Malt On Dry-Hopping, Alexander Kivela

Master's Theses

Dry-Hopping is a modern and ever-increasing method to add hoppy flavors to beer. This is typically seen in pale ales and India Pale Ales (IPA’s). Most research has investigated the effect of dry-hopping only using pale malt, whereas most breweries used specialty malts to create a malty backbone to their beer.

The objectives of this research were to analyze the impact of specialty malts and their concentration on the efficacy of hop flavor and extraction, determined via gas chromatography and sensory analysis. Gas chromatography analysis was modeled after the ASBC Method Beer-48. Sensory analysis was performed via the 15cm line …

Hardware-In-The-Loop Evaluation Of Sensor-Source Selection For Prosthetic Locomotion Intent Recognition, Victoria Asencio-Clemens

Master's Theses

Active lower-limb prostheses use intent-recognition systems to identify a user’s locomotion mode and select an appropriate control strategy, but sensor configurations that perform well offline may be unsuitable for resource-constrained embedded hardware. Existing sensor-selection methods generally prioritize classification accuracy without directly accounting for processing latency, memory usage, or other hardware-dependent requirements. To address this limitation, this thesis develops a hardware-in-the-loop source-selection framework for embedded classification of level walking, ramp ascent, ramp descent, stair ascent, and stair descent using multimodal biomechanical data from transtibial amputee participants. Subject-specific linear support vector machine classifiers were evaluated using trial-held-out validation, and candidate configurations from …

Predicting Student Belonging In Computing Education: A Multimodal Machine Learning Approach Using Eeg And Survey Data, Hannah Moshtaghi

Master's Theses

Measuring students’ sense of belonging, characterized by feelings of acceptance, inclusion, and encouragement from teachers, remains a significant challenge in computing education. Prior research has associated this multidimensional construct with positive academic outcomes and has identified instructors’ growth- and fixed-mindset messaging as a potential influence. However, belonging is a complex and deeply personal experience that is difficult to capture through direct observation alone. Current measurement methods rely on self-report surveys, which may not capture every aspect of an experience that can also involve emotional and cognitive responses.

This thesis investigates whether combining EEG data recorded during a belonging questionnaire with …

Beyond Beliefs: Factors That Shape Agricultural Plastic End-Of-Life Management Among California Strawberry Growers, Kyle Y. Cahitas

Master's Theses

The practice of using plastics in agriculture is so prevalent it has earned its own name: plasticulture. One key plasticulture tool is polyethylene (PE) mulch film, a thin plastic sheet laid over the field for a single growing season and pulled out before the next. Because PE film is hard to recycle, most of it ends up in a landfill, yet how growers decide what happens to used plastic mulch has rarely been studied. To identify what shapes that decision, this study draws on a survey of California strawberry growers (n = 126). Twenty variables, spanning grower attitudes, farm characteristics, …

A Maintainable Extensible And Performant Compiler Toolchain For The Trustguard Architecture, Ethan N. Emery

Master's Theses

TrustGuard is a hardware architecture implementing a CAVO (Containment Architecture with Verified Output) model, which provides security guarantees by bootstrapping trust of a system to a hardware component known as the Sentry. Rather than verifying an entire system, TrustGuard re-executes trusted computation on the Sentry and validates the host system's execution before allowing values to pass to the outside world, thereby containing the effects of erroneous computation. Implementing this architecture in practice without hardware modifications to a host CPU requires a compiler toolchain capable of automatically generating instrumented binaries for both the untrusted host and the trusted Sentry from C …

Expected Structural Damage, Residual Capacity, And Repairability Of Light-Frame Timber Houses, Mikayla Caruthers

Master's Theses

Earthquake damage in light-frame timber structures is commonly evaluated using peak inter-story drift. However, drift alone does not fully represent the remaining structural capacity of a building or its ability to be repaired following a seismic event. Although expected structural damage, residual capacity, and repairability have each been studied extensively, these concepts are often considered independently, leaving limited guidance that links them within a unified post-earthquake assessment methodology.

This thesis establishes an integrated framework that relates expected structural damage, residual capacity, and repairability for light-frame timber residential structures. Existing literature was synthesized to develop drift-based damage-state classifications, identify methods for …

Synthesis And Characterization Of Carbon Quantum Dots And Gold Nanoparticles For Norovirus Biosensing Applications In Water Systems, Breanne Evans

Master's Theses

Rapid, reliable detection of viral pathogens remains a significant challenge across water-treatment and environmental monitoring systems, including drinking-water, wastewater, water reuse, and environmental surveillance applications. Waterborne viral contamination can pose substantial public-health risks, making early detection essential for protecting water quality and responding quickly to treatment failures or contamination events. Direct potable reuse (DPR) is one particularly demanding example because it requires continuous verification of treatment performance and the broader need for rapid virus monitoring extends across many water-treatment and environmental surveillance applications. Norovirus is a priority target because of its widespread occurrence in wastewater, environmental persistence, and exceptionally low …

A Technoeconomic And Lifecycle Analysis Of Catalytic Non-Thermal Plasma Steam Methane Reforming For Renewable Hydrogen Production, Gustav M. King

Master's Theses

When produced with sufficiently low life-cycle emissions, hydrogen may support low-carbon, dispatchable electricity generation to realize statewide renewable energy regulatory objectives. This thesis develops a screening-level electrothermochemical process model of catalytic non-thermal plasma steam methane reforming (CNTP-SMR) and integrates it with techno-economic and life-cycle assessments. Biogas and natural gas fed CNTP-SMR scenarios are compared with conventional steam methane reforming to evaluate hydrogen production cost, global warming potential, and the effects of key operating parameters. Under the baseline assumptions, CNTP-SMR generated hydrogen at a higher levelized cost (baseline of $3.86/kg H₂ and a range of $3.68 to $4.11) when compared …

Comparing 3-Connectedness And Roundness In Matroid Theory, Blanca Delia Larios

Electronic Theses, Projects, and Dissertations

A matroid is a discrete mathematical object that abstracts and connects the various notions of independence found throughout mathematics. Such notions of independence include linear independence, algebraic independence, as well as notions of independence that arise in graph theory. There are many broad classes of matroids. Important examples include binary matroids, graphic matroids, regular matroids, uniform matroids, and various levels of connected matroids. Some of the most important problems in matroid theory involve characterizing classes of matroids so that such characterizations can be used to prove results concerning these matroid classes. This thesis is a study of two important classes …

Impact Of Repeated Serotonin 6 Receptor Activation On Weight And Anxiety In C57bl/6j And Btbr Mice, Pedro Flores

Electronic Theses, Projects, and Dissertations

Selective Serotonin Reuptake Inhibitors (SSRI) are the most common form of medication prescribed to people with anxiety disorders. One of the most common side effects is weight gain. This weight gain often leads to the suspension of treatment. This has led to studies focusing on specific serotonin (5-HT) receptor targets for modulating depression and anxiety. Studies examining 5-HT6 antagonist treatment have shown that they reduce body weight as well as produce brain specific changes. Less is known regarding 5-HT6 receptor agonists, although previous literature has shown that exposure to high doses produces weight loss but not at lower doses, while …

How Recent Medicaid Defunding Has Impacted San Bernardino County Residents Access To Health Care Services, Samantha I. Rios

Electronic Theses, Projects, and Dissertations

Background: Medicaid is a critical source of health insurance for low-income populations in the United States, providing access to essential preventative, primary, and reproductive health care services (Donohue et al., 2022). The Medicaid defunding of 2025 and policy changes that follow have raised concerns regarding increased barriers to care, particularly among low-income and vulnerable populations who rely on safety-net providers such as Planned Parenthood (Planned Parenthood, 2025). The purpose of this study was to examine how the 2025 Medicaid defunding has impacted access to general and reproductive health care services among residents of San Bernardino County, California.

Conclusion: The research …

From Margins To Center: Los Deslenguados In The Borderlands, Brissa S. Porras Villalobos

Electronic Theses, Projects, and Dissertations

Borderland literature is a subgenre that often includes narratives of migration, tribulations, identity development, and resilience. It foregrounds the collaboration of vulnerability, isolation, connection, and power, showing that hybridity is a source of cultural energy. Acknowledging the borderland and its culture is crucial because it challenges stereotypes, validates marginalized voices, and celebrates heritage in all its complexity. By centering these experiences, borderland literature affirms the potential of living between cultures, prioritizing the recognition of the in-between, valuing and celebrating the space where identities are continually reshaped, histories are reclaimed, and resilience is nurtured rather than neglected. Using Gloria Anzaldúa's theory …

The Relativity Of Education: Student Perspectives On Artificial Intelligence In Community College, Ashley Greta Magana

Electronic Theses, Projects, and Dissertations

This hermeneutic phenomenological study examined how diverse community college students experience and make meaning of the integration of generative artificial intelligence (AI) into their educational contexts. Although AI is quickly transforming higher education through automated grading, personalized learning systems, and new models of assessment, the discourse surrounding its implementation remains dominated by administrators, faculty, and institutional stakeholders, while the perspectives of students, specifically community college students who are often historically underrepresented and economically marginalized, are systematically excluded. Most existing research is quantitative and centered on universities, leaving a critical gap in qualitative understanding of the most diverse population in higher …

A Culturally Responsive Sexual Health Education Framework For Community Clinics In The Inland Empire, Lilianna Mora Ledezma

Electronic Theses, Projects, and Dissertations

Sexually transmitted infections (STIs) continue to disproportionately affect underserved communities, where barriers such as limited healthcare access, stigma, healthcare anxiety, medical mistrust, and language differences may discourage individuals from seeking routine screening and timely treatment. This project examined current public health literature, surveillance data, and federal guidance to identify evidence-based strategies that community clinics can implement to improve patient engagement in sexual health services. The findings demonstrated that effective STI prevention extends beyond testing alone and is strengthened through culturally responsive care, stigma reduction, patient-centered communication, standardized clinic workflows, and effective patient navigation. As a result, this project developed a …

The Effect Of Telehealth Expansion On The Health Equity Of Underserved Populations, Mansi B. Satani

Electronic Theses, Projects, and Dissertations

The rapid expansion of telehealth, during and after the COVID-19 pandemic, has changed healthcare delivery in the United States. The use of telehealth can potentially decrease disparities related to isolation, shortage of providers and barriers to transportation, however, its impact on health equity in underserved populations is unknown. This paper explores how telehealth expansion impacts rural populations' access to healthcare, health outcomes, and equity. It also examines its impact on populations with low income, racial, ethnic minorities, and Medicaid recipients who frequently encounter obstacles to healthcare and digital access (Nouri et al., 2020; Shah et al., 2024). A mixed-method design …

Comparative Assessment Of Developmental Fidelity In Hpsc-Derived Neural Crest Cells, Michael H. Zepeda

Electronic Theses, Projects, and Dissertations

Neural crest cells (NCCs) are a transient, multipotent cell population that contributes to craniofacial structures, peripheral neurons, melanocytes, and smooth muscle. Defects in NCC development underlie a broad range of congenital disorders known as neurocristopathies. Human pluripotent stem cell (hPSC)-derived NCCs provide an evaluable model for studying early human development; however, existing differentiation protocols produce variable outcomes, and no standardized method consistently generates high-fidelity NCC populations. To address this challenge, we compared five published hPSC-to-NCC differentiation protocols using the H9 human embryonic stem cell line. We hypothesized that specific protocols more faithfully recapitulate neural crest development through coordinated regulation of …

How Establishing "Duration Of Treatment" Guidelines Shortens Workers' Compensation Cases, Annette Marie Smith M.D.

Electronic Theses, Projects, and Dissertations

Jobs provide financial security for individual workers and their families in the community until a worker gets hurt on the job, and then things are up in the air until their workers’ compensation claim is approved. It is a well-known fact within the workers compensation literature that one third of all workers’ compensation (WC) claims are “low back sprains and strains” which are the leading cause of global disability (Ummey, 2023). This project proposed to explore the relationship of x-ray and MRI result interpretations by the physician and standardize the duration of treatment with a physical therapist and new concept …

Genocide As Patriotic Duty: The Outcomes Of Ultranationalism And Dehumanization From World War Ii Genocide Orchestrators, Corie R. Blais

Electronic Theses, Projects, and Dissertations

The thesis provides a contribution to the field of history how nationalism

often transforms individuals during wartime to become dehumanizing

ultranationalists through patriotism and its connection to genocide.  Also, it gives

insight into the many ways that genocide orchestrators during World War II,

relied on propaganda of racism, religion, and “othering” in order to justify their

incentives to expand territories and dehumanize victims through medical

experimentations and sexual violence.  While research materials in the context of

Nazi Germany were ample, one challenge in my research was finding

documentations on Stalin’s People Commissariat of Internal Affairs (NKVD)

police unit which carried …

Role Of Stigma On Engagement In Mental Health Services For Latinxs With First-Episode Psychosis (Fep), Livia J. Padron Briceno

Electronic Theses, Projects, and Dissertations

Psychotic patients often endure stigma in their daily lives (Corrigan, 2018). Psychotic patients are understood as individuals who are experiencing psychotic symptoms such as hallucinations, delusions and disorganized speech (Arciniegas, 2015; Breitborde et al., 2017; Moskowitz et al., 2019) and have been diagnosed according to the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) criteria with a psychotic disorder (e.g. Schizophrenia, Schizoaffective Disorder). Stigma refers to negative perceptions held about an individual experiencing mental illness. While public stigma refers to the negative views adhered to by members of communities (e.g., sociocultural group, family units) about people with mental illness, self-stigma …

From Genes To Streams: Mitochondrial Approaches To Population Monitoring Of The Santa Ana Sucker Catostomus Santaanae, Mariana Antonio

Electronic Theses, Projects, and Dissertations

This study was developed to use aquatic environmental DNA (eDNA) as a tool to detect the presence of the Santa Ana sucker (Catostomus santaanae), a federally threatened fish species, across the Santa Ana River in Southern California. Environmental DNA is any genetic material that an organism sheds into the environment. We can get an idea of what aquatic species are present when sampling water at a given site. We sequenced the complete mitochondrial genome (mitogenome) of the Santa Ana sucker and designed custom DNA primers to improve eDNA detection accuracy. These primers were selected based on high genetic …

Harnessing Airborne And Spaceborne Lidar For Large-Area Assessment Of Canopy Structural Complexity, Tahrir Ibraq Siddiqui

Theses

Forests play a vital role in global carbon cycling, biodiversity conservation, and the provision of ecosystem services. Accurate quantification of forest carbon sequestration rates – or forest production – therefore is essential for understanding ecosystem dynamics and informing sustainable forest management practices. Light detection and ranging (LiDAR) systems, as an active remote sensing modality, have emerged as a powerful tool for capturing detailed structural information of forests. Studies employing terrestrial LiDAR demonstrated that canopy structural complexity (CSC) metrics are strongly correlated with forest production at stand to landscape scales. While terrestrial LiDAR systems provide highly detailed maps of internal canopy …

Analysis Of A Process-Based Approach To Case Formulation And Treatment With Acceptance And Commitment Therapy, Callum Smith

Dissertations

Process-Based Therapy (PBT) is a novel approach to clinical research and practice. PBT is proposed as an alternative model to classic diagnostic frameworks. It emphasizes conceptualizing psychological problems through adaptive and maladaptive processes of change. The aim of current PBT research is to develop reliable methods of organizing change processes into network models. In network models, change processes are presented in nodes connected by lines and arrows to represent the interacting relationships between those processes for a given individual. The present project aims to evaluate the inter-rater reliability and predictive validity of a novel semi-structured interview method to aid in …

Establishing And Validating Foundational Competencies In The Application Of Behavioral Gerontology Through Expert Consensus, Alexandra Doran

Dissertations

Behavioral gerontology continues to evolve and grow as an application of behavior analysis, but there remains a critical need to define competencies necessary for behavior analysts to provide ethical, effective care within their scope of competence. This study sought to establish and validate foundational competencies for Board Certified Behavior Analyst s® (BCBA s® ) working in this area. A mixed-methods design using three experiments was used. In Experiment 1, a review of discipline-specific competency frameworks and a job mapping process yielded a preliminary set of behavior-analytic competencies for behavioral gerontology. This produced a preliminary framework consisting of 142 competencies. Experiment …

Evalutating Self-Instructional Training Materials To Teach Caregiver Implementation Of A Reading Program, Ky'aria Moses

Dissertations

Approximately 69% of fourth grade students and 70% of eighth grade students performed below the proficient level on the 2024 National Assessment of Educational Progress (NAEP) reading assessment, highlighting ongoing gaps in early literacy skills (NAEP, 2024). Caregiver implementation of instructional reading strategies can positively impact children’s literacy development; however, training is often required to ensure fidelity. Teach Your Child to Read in 100 Easy Lessons (TYC), is an evidence-based Direct Instruction reading program designed for caregiver implementation, yet its written self-instructional Practice Guide may be insufficient for developing fluent instructional delivery. Research suggests that programmed instructional formats incorporating active …

Black Adolescents' Understanding Of Racial Trauma: An Interpretive Phenomenological Analysis, Winifred Wilson

Dissertations

Over the past two decades, scholars have increasingly recognized that chronic stress from racism can cause racial trauma in Black individuals. However, research on the impact of racial trauma on Black adolescents remains limited. Understanding the language and experiences of Black adolescents is essential for identifying and addressing the biopsychosocial effects of racial trauma. This study used interpretive phenomenological analysis to examine how 12 Black adolescents (9 boys, 3 girls, aged 14-17) from the Midwest conceptualize, experience, and cope with racial trauma. Participants completed two interviews: an initial session exploring their understanding and experiences, and a member-checking interview (completed by …

Severity-Informed Analysis Of Staff-Worn Personal Protective Equipment Use In An Applied Behavior Analysis Clinical Setting, Trey Ximenez

Dissertations

Staff who provide care for individuals with autism spectrum disorder and intellectual disability experience high workplace injury rates, particularly in applied behavior analysis settings (Hardesty 2020; Hardesty et al., 2025; Romani et al., 2020). Despite these elevated risks, organizations lack evidence-based criteria for determining what protection to recommend to staff based on documented injury outcomes (Irwin Helvey et al. 2024). This study examined how staff injury characteristics are associated with staff-worn personal protective equipment (PPE) use in an inpatient neurobehavioral unit. A retrospective analysis of 1,998 staff injury incidents from 105 patients (2020-2024) tested whether injury severity, injury type relevance, …

Bridging The Gap: Action-Oriented Vs. Community-Minded Mentalities And Behaviors In Cold Case Investigation Units, Samantha Strine

Dissertations

One key group in policing that has seen an increase in public and media attention but not research is the cold case investigation unit. These units tend to be more “bureaucratic”, focusing on communication, community-engagement skills, and “desk work”. Thus, this is a potential area for learning techniques and policies that shift the mentalities within police culture to be more accepting of new community focused policies. This study also seeks to address a gap in current research related to studying specialized police units.

The purpose of this study is to describe the organizational dynamics and officers’ tactics, perceptions, and interactions …