Digital Commons Network^™

Development Of A Novel Bio-Mimetic Ornithopter With Variable Flapping Angle, Geourg Kivijian

Master's Theses

From the beginnings of flight, flapping-winged flight has been a goal of many engineers to mimic and replicate. With gains in aerodynamic efficiency of flight and certain other favorable characteristics such as reduced noise, higher maneuverability, and surveillance opportunities in urban environments, flapping-wing aerial vehicle(FWAV) designs are consistently pursued in many corners of academia and industry. This thesis goes into the development of a flapping wing aerial vehicle with a Bio-mimetic novel drive mechanism that is cable-driven and can produce variable amplitude and frequency flapping stroke. Employing a Field-Oriented Control (FOC) Brushless Direct Current (BLDC) motor, paired with a bio-mimetic …

A Fault-Tolerant, Multi-Heap Dynamic Memory Allocator For Freertos, Garrett E. O'Neill

Master's Theses

The use of dynamic memory allocation presents a significant challenge for embedded systems, particularly in applications that require high reliability. The software controlling these systems needs to perform critical operations within strict timing constraints, and memory management plays a critical role in a system’s ability to meet these constraints. Dynamic memory allocation is inherently non-deterministic: if a task requests memory, it is impossible to predict how long it will take for the memory to be allocated. If a critical task were to rely on dynamically allocated memory, its execution could become stalled leading to a missed deadline and system failure. …

Leveraging Machine-Learning Algorithms In Two Car Crash Detection Systems On A Custom Dataset, Addison Jacob Sandvik

Master's Theses

Traffic accidents pose a significant threat to public safety, causing millions of deaths and injuries worldwide each year. While efforts to reduce accidents have seen limited progress in recent years, improving emergency response times through automated detection systems is a promising avenue for saving lives. This thesis describes the development of machine learning-based traffic accident detection systems, exploring both video classification and image detection models. The models are trained on a new dataset deemed the Cal Poly Traffic Accident Dataset, an extension of the existing Car Accident Detection and Prediction (CADP) dataset with a precise collision annotations. Two systems were …

Design, Fabrication, And Testing Of A Dual-Rate Spring System For Mountain Bike Frames, Lucas P. Grizzle

Master's Theses

The design of full-suspension mountain bikes is a careful balance of suspension kinematics, structural dynamics, and manufacturing optimization for the expected use case. A bike designed to excel in one area will likely exhibit reduced performance in others. This optimization problem is addressed by designing, integrating, and testing a dual-rate spring system within a fully custom frame. The dual-rate spring is fully decoupled from the rest of the suspension kinematics, providing designers with an additional parameter to achieve ideal suspension behavior. This is accomplished by placing a thermoplastic polyurethane (TPU) bushing in series with the rear shock. The influence of …

Thermal Modeling Techniques For Additively Manufactured Porous Metals, Lucas D. Rambo

Master's Theses

Advances in additive manufacturing have enabled the creation of metallic components with tailored porosity, offering design flexibility for thermal, structural, and fluid transport applications. This thesis investigates the effective thermal conductivity (ETC) of porous Inconel 625 (IN625) and Inconel-ceramic composites (IN625-RAM2) fabricated by Laser Powder Bed Fusion (LPBF) using Elementum 3D’s PermiAM technology. Experimental measurements of thermal conductivity using the laser flash method are compared to numerical models built from micro-computed tomography data. Simulations were performed using both finite element (FE) and finite volume (FV) methods to evaluate thermal transport in real microstructures. The study investigates the effects of micro- …

Density-Dependent Habitat Selection And Home Range Sizes In A Recovering Population Of Island Foxes (Urocyon Littoralis) On Santa Rosa Island, California, Kathleen B. Elder

Master's Theses

Understanding factors that affect how animals select their home ranges is critical for proper species management, especially for threatened and endemic species. Density-dependent factors can be particularly difficult to understand because studying them requires large fluctuations in population size. The island fox (Urocyon littoralis), endemic to the California Channel Islands, has experienced dramatic fluctuations in population size making it an excellent candidate for studying the effects of density on home range size and habitat selection. In 2009, researchers on Santa Rosa Island took advantage of this “natural experiment” to document fox home ranges and habitat selection at a …

From Conflict To Clarity: Resolving Differences In Habitat Assessments To Inform Conservation Priorities For The Giant Kangaroo Rat, Caroline Mackenzie

Master's Theses

From Conflict to Clarity: Resolving Data Differences in Habitat Assessments to Inform Conservation Priorities for the Giant Kangaroo Rat

Caroline MacKenzie

Conservation strategies frequently rely on habitat suitability models, habitat assessments and species occurrence data to identify areas for protection. However, these methods often produce conflicting inference on species presence and habitat quality, complicating management decisions. This study builds on prior work which used three distinct methods to guide conservation planning for the endangered Giant Kangaroo Rat (Dipodomys ingens): habitat suitability modeling based on abiotic predictors, aerial imagery to assess habitat quality through visible burrow mounds and live-trapping …

Multibeam Communication With Digital Sparse Arrays, Tavita Dayton

Master's Theses

The thesis presents a novel approach to maximizing spectral efficiency by utilizing spatial spectrum sharing in digital sparse arrays through non-uniform element configurations. A genetic algorithm approach is developed to optimally place the array elements to achieve maximum beam orthogonality and isolation. The proposed method is compared against three different configurations, namely purely random, random with jitter, and the Van Der Corput sequence (a low-discrepancy sampling approach). Simulated results demonstrate that the genetic algorithm and jitter methods successfully meet design specifications for beam orthogonality, average interelement spacing, and computational time. At the same time, the random and Van Der Corput …

Open Source Asic Design Curriculum, Francisco Wilken

Master's Theses

The ever-growing importance of Application-Specific Integrated Circuits (ASICs) in a high-compute world necessitates that college graduates entering the workforce are well prepared to design them. This thesis details the design of novel ASIC curriculum, using open source tools to teach at the undergraduate level. By moving to a higher level of abstraction than classical transistor-focused coursework, chip design material can be made accessible earlier in an undergraduate degree. Additionally, open source tools provide a powerful, free, and portable platform for students to create their own designs, solving assignments focused on industry readiness. Finally, this thesis studies the results and challenges …

Remote Monitoring And Control Of Protection Relays Via Programmable Logic Controller, Rio Mcgown-Kauffman

Master's Theses

The purpose of this study is to explore the ability of a programmable logic controller (PLC) to wirelessly monitor and control power protection relays. The technologies surrounding power protection and industrial automation are ever evolving and have developed significantly in recent history. Industrial power applications call for consistent condition monitoring and status updates for various high-importance components. The high-importance components have power protection schemes that are managed by digital relays to trip circuit breakers in fault or unsafe operating conditions. The smart relays have a wide range of capabilities, including communications. Cal Poly assembled a collection of relays from Schweitzer …

Birch With Tidyclust In R, Jacob Perez

Master's Theses

This thesis introduces a new implementation of the BIRCH clustering algorithm within the tidyclust framework in R. Traditional hierarchical clustering methods face scalability limitations with large datasets, due to their computational complexity. BIRCH offers a scalable alternative by summarizing data into microclusters using a CF-tree. This work shows the integration of the phases of the BIRCH algorithm into tidyclust, which enables a streamlined workflow for model specification, evaluation, and prediction. Through this implementation, scalable hierarchical clustering has been brought to R users within the tidyclust interface, enhacing the ability to better analyze large datasets.

Hands-Free Balance Protocol And Development Of An Iphone App For Self-Assessment, Jacob Matties

Master's Theses

For many clinical populations, the measurement of balance is a critical task. Previous studies have agreed that smartphone IMUs provide a valid measure of balance that can be significantly correlated with force plate measurements and is sensitive enough to distinguish between various balance poses, but many balance assessment protocols require uncommon equipment or the use of hands during assessment. These limit accessibility of balance assessment. To eliminate the need for hands or any additional equipment, this study assessed the use of a smartphone recording the root mean square of 3D acceleration magnitude. The goal of the study was to determine …

Analyzing Player Difficulty Perception In Platformers Through Procedural Level Generation, Sasank Madineni

Master's Theses

Games utilizing Procedural Level Generation (PLG), such as Roguelikes, are becoming increasingly popular in today's gaming sphere. In games employing PLG, levels are generated randomly or pseudo-randomly, and aim to retain player attention through variance in levels between playthroughs. However, when generating levels with variance in structure and design, player enjoyment is often a mixed bag. With low enjoyment, player retention for these games can dwindle. This study explores the efficacy of real-time difficulty adjustment in procedurally generated platformers, as a method for maintaining stable player enjoyment without causing frustration. This thesis focuses on creating a short user experience, MIMEVA, …

Hybrid Computing For Real-Time Model Predictive Control Of A Buck Converter, Grace Paladichuk

Master's Theses

Advancements in power electronics require high switching frequencies which the digital control routines of the systems cannot keep up with. Analog computing is added to digital control systems to prevent bottlenecks and allow real-time implementation. This paper proposes a hybrid computing model predictive control system for a buck converter. The control system implements the gradient dynamics of the optimization function using digital computing, and the gradient dynamics for the penalty function and integrator using analog computing. For the full simulations of the entire system, the PLECS RT Box is used to simulate the controller in real time with a 1 …

The Relationships Among Orthorexia Nervosa, Perfectionist Tendencies And Academic Achievement In Nutrition And Dietetics Students, Sophia Grace Owens

Master's Theses

Eating disorders can cause a disturbance in how the health of food is viewed (Cerniglia et al., 2017). If a person has disturbances in their eating behaviors that can cause harm to their health, but the behaviors do not fit into the criteria of a specific eating disorder, they fall into the category of a disordered eating pattern (Academy of Nutrition and Dietetics, 2018). Because of the stress the college environment can cause students, some college students may cling to anything they can control, which may be reflected in their dietary habits. Orthorexia Nervosa (ON), a disordered eating pattern, is …

The Antioxidant Potential Of Rosemary Leaf-Derived Nanovesicles, Shani Akila Griffin

Master's Theses

Human dermal fibroblasts are essential for maintaining skin homeostasis. However, exposure to exogenous and endogenous stressors can lead to fibroblast instability, extracellular matrix degradation, and excessive reactive oxygen species (ROS) production. These factors contribute to skin aging and ROS-induced skin disorders leading to hair loss. Adverse effects from synthetic treatments have driven interest in natural alternatives like plant extracts for skin therapy. However, the polyphenols in these treatments require an effective delivery system to ensure their stability and targeted application. Plant derived nanovesicles (PDNVs) are emerging as a promising natural alternative for therapeutic applications. Their biocompatibility, stability, and encapsulated compounds …

The Impact Of Teacher Training On Newcomer Integration, Erika Ibanez

Master's Theses

As global migration diversifies classrooms, teachers face growing responsibility to meet the academic, social, and emotional needs of students navigating new cultural and linguistic contexts. Therefore, this thesis examines how teacher training programs shape educators’ ability to support newcomer students in U.S. schools. Chapter One outlines the research problem and objectives, highlighting the need for inclusive teaching practices that promote newcomer integration. Chapter Two reviews literature on newcomer student integration, instructional strategies, and teacher professional development, framed by Culturally Sustaining Pedagogy. Chapter Three outlines the qualitative methodology, which involved semi-structured interviews with five K–12 teachers. Chapter Four presents key findings, …

The Algorithm Of Inclusion: Homonationalism, Queer Advocacy, And Digital Marketing Of Un Ecosoc Ingos And Indian Ngos, Dewansh Chauhan

Master's Theses

Advocacy organizations have increasingly turned to social media as digital platforms become integral to contemporary activism, shaping public discourse and securing institutional legitimacy. This thesis examines the organizational communication of organizations that support marginalized sexualities within a neoliberal and homonationalist context. Employing Critical Content Analysis (CCA), the study analyzes a representative sample of 200 Instagram posts from 2024, comparing two international NGOs with ECOSOC status at the UN (Outright International and ILGA) and two national NGOs in India (Humsafar Trust and Naz Foundation). The findings reveal how homonationalist tendencies may manifest at the intersection of engagement metrics, identity-centric rhetoric, brand …

The Long-Term Effect Of Universities On Local Technology, Dafina Rizvanolli

Master's Theses

This paper studies the long-term effects of universities on local economic complexity, contributing to new evidence on how higher education institutions shape local productive capabilities over time. While extensive research documents universities’ positive impact on development, fundamental questions remain about the mechanisms through which they operate. Our study employs the Economic Complexity Index (ECI), a measure that captures the diversity and ubiquity of regional economic structures, to provide novel insights into universities’ influence on local economies. Building on Andrews (2023), we exploit historical natural experiments in university site selection during the 19^th and 20^th centuries in the U.S. …

Sustainability In Professional Sports: A New Nexus Of Profit And Social Responsibility, Matthew Teplitz

Master's Theses

The world is facing a climate crisis – corrective action that will improve our collective situation is needed, now. Those with the power to do so, in the capitalist structure under which we live, are largely the individuals, corporations, and governments with financial resources and the platform to inspire others to act. Two such entities, complete with the financial heft to make a difference and inspiration to spare, are North America’s National Basketball Association (NBA) and Spain’s La Liga. This thesis seeks to understand what distinguishes the NBA’s approach to sustainability from La Liga, and by employing each league as …

Identification Of Methylation Patterns, Associated Dna Methylating Proteins, And Methyltransferase Inhibitors On The Promoter Regions Of Dax-1, Brandon Tyler Toy

Master's Theses

The DAX-1 gene (Dosage-Sensitive Sex Reversal, Adrenal Hypoplasia Congenita, Critical Region on the X chromosome, gene 1) encodes for an orphan nuclear hormone receptor and its mutation is implicated in multiple diseases including congenital adrenal hypoplasia, adrenal cancer, and breast cancer. Previous research has linked DAX-1 downregulation to tumor initiation in breast tissue, suggesting the gene acts as a tumor suppressor with respect to breast cancer. Additional studies completed by the Tzagarakis-Foster laboratory have shown that methylation of the DAX-1 promoter region is heavily influential in breast cancer development, with release of epigenetic repression resulting in slowing of cellular proliferation …

Establishment Of Six Flags Over The Deconstruction Of Sandtown, John Ely

Master's Theses

Development, both private and public, has played a crucial role in the knowledge that historians can take from the land, but the desire to build quickly ultimately destroyed many sites before they were properly studied. The Chattahoochee River, along with almost all the other rivers and streams in the Southeast, supported not only survival but civilization. Unfortunately, almost the entire catalog of scholarly sources regarding these places was written by men of European descent, and these writers rarely discuss the details regarding the fate of the sites that were destroyed in the name of industry. Sandtown was an almost mythic …

Reverse Engineering Of Binary Programs Using Graph Attention Networks, Sai Nikhila Kanigiri

Master's Theses

Understanding the functionality and behavior of binary code is essential for many software engineering tasks, including malware analysis, vulnerability detection, and program optimization. However, automating this process is challenging due to the complexity of machine code and the significant manual effort required from experienced software engineers. In this paper, we present BinGAT (Reverse Engineering of Binary Programs using Graph Attention Networks), a method for classifying binary programs into algorithmic categories using Graph Attention Neural Networks (GNNs) based on their Control-Flow Graphs (CFGs). Given a binary program, BinGAT extracts its CFG through static analysis and transforms the assembly instructions within each …

Cartoon Kinship, Kelsey Bell Quinn

Master's Theses

Most people view cartoons as mindless entertainment exclusively for children. They dismiss the genre as if it only contains zany and overzealous characters who deal with simple, predictable challenges, easily resolved by the end of the episode. The negative attitude towards cartoons—or seemingly anything animated—undermines the importance of the lessons and the themes many shows do impart on their viewers, regardless of their age. Shows like Nickelodeon's Avatar: The Last Airbender cover a plethora of complex themes, but due to its status as an animated work, it has been disregarded as a show for children rather than being appreciated as …

Does Limb Specialization In Track And Field Introduce Asymmetry In Dynamic Stability?, Aaron X. Jones

Master's Theses

Time to stabilization (TTS) represents the time it takes for a person to become still after a hop landing. Lower times suggest greater dynamic stability. Whereas leg dominance (preference) does not seem to have a significant impact on TTS performance in the general healthy populations, limb specialization in sport may introduce asymmetry. This study compares TTS following forward hops in healthy male controls (N = 19) to varsity DIII Track & Field athletes (N = 20). Groups were equal for height, but the athlete group’s average limb length (106.7 ± 5.5 cm) was greater than the control group (101.5 ± …

Impacts Of Temperature Acclimation On Swimming Performance And Metabolic Dynamics Of The Amargosa River Pupfish, Cyprinodon Nevadensis Amargosae, Teresa E. Guerre

Master's Theses

Climate change is leading to warmer atmospheric temperatures in many regions of the world, which in turn is raising the temperatures of aquatic habitats and simultaneously shifting the frequency and severity of extreme precipitation events. In fishes, metabolic demands are higher under warmer conditions, while dissolved oxygen levels typically decline in warmer water. This mismatch may limit the ability of fishes to cope with high water flow events like floods that can occur following extreme rainfall. A few species of pupfishes (genus Cyprinodon) in the Death Valley region of California and Nevada, USA, occupy stream or river habitats with …

Evaluating Cannabigerol As A Therapeutic Agent In Non-Alcoholic Fatty Liver Disease, Michael J. Viereckl

Master's Theses

Non-Alcoholic Fatty Liver Disease (NAFLD) is a prolific disease worldwide, with rising incidence and limited treatment options. The disease is progressive, what begins as simple lipid congestion within the cells of the liver eventually leads to incitement of inflammatory reactions and destruction of the liver which can further develop into cancer. Epidemiological data suggests that Cannabis use is associated with reduced incidence of NAFLD, and relatively recent changes in the plants legal status now affords us with the opportunity to investigate unstudied cannabinoids in the context of NAFLD. Further, growing popularity of these bioactive compounds as supplements warrants investigation into …

“But Where Are Those Good Old-Fashioned Values?”—The Racial Politics Of Animated Satire In Family Guy, Jordanne Greenidge

Master's Theses

Few animated shows have shaped American pop culture quite like Family Guy. Known for its rapid-fire cutaway gags and irreverent humor, the series has remained a television mainstay since its debut in 1999, despite frequent criticism and even two cancellations. Created by Seth MacFarlane and based on his 1995 student film The Life of Larry, Family Guy has built its reputation on pushing the boundaries of taste, especially when it comes to race, gender, and politics. Though often defended as satire, the show’s use of racial humor raises questions about its true impact: Do its portrayals of Black characters challenge …

Edouard Reményi And Johannes Brahms: A Lifelong Influence Reconsidered, Katherine Marie Martin

Master's Theses

Edouard Reményi was one of the first important influences in Johannes Brahms’s life and compositional career. Yet, beyond a single biography, much of what is commonly believed about Reményi is based on information provided by the Brahms literature.

By reexamining the accounts of Reményi in the Brahms literature, and comparing them with Mary Kelley and George Upton’s biography of Reményi and Robert Eshbach’s excellent research, the timeline of Reményi’s life and work can be clarified. Analysis of a set of three pieces for violin and piano demonstrates Reményi’s work as a composer and illustrates the style of Hungarian music that …

Doin' Time: Entertainment And Exploitation At Decommissioned Prison Museums In The United States, Jessi Robbins

Master's Theses

This thesis aims to explore how decommissioned prison museums in the US, such as Brushy Mountain State Penitentiary (BMSP), shape societal attitudes and understanding of the carceral system as a whole and the presence of systemic racism within by addressing three questions: (1) What histories do prison museums tell, and which are erased?, (2) How do objects displayed in prison museums reflect past and present racial attitudes toward the incarcerated?, and (3) Does visiting or working at a prison museum affect individual attitudes regarding the US carceral system? Grounded in James Scott’s (1992) concept of “hidden transcripts” and Michel Foucault’s …