Digital Commons Network^™

7lr-C Upper Limb Dancing Prosthetic, Victor Ochoa, Zoe Kelemen, Ged Mulingtapang, Marley Paltiel

Mechanical Engineering

Ella Wallis, a student at Cal Poly and performer in the Cal Poly Drag Club with a trans humeral upper limb difference, wants a prosthetic device that allows for a large range of motion and high degree of articulation to help them better dance in the style of voguing, allowing them to express themselves further while performing. The prosthetic arm is body-driven and relies on momentum to reposition. It attaches to the user through a harness, which is clipped to a socket with elastic straps to not impede the shoulder’s range of motion. The design contains urethane resin, aluminum, stainless …

Drone Package Delivery System, Aiden Tyler Sim, Ryan Anders O'Toole, Matthew Karl Wyant, James Shaw Glanville

Mechanical Engineering

In response to the demands of the 2025 C-UASC (California Unmanned Aerial Systems Competition), our team developed an autonomous drone payload delivery system capable of two distinct delivery modes: a precision-controlled descent and a high-speed aerial drop. Designed for modular integration with UAV platforms, the system prioritizes reliability, accuracy, and simplicity under desert environmental conditions. Our solution features a custom winch mechanism with a programmable stepper motor, a passive mechanical hook for tension-based release, and a servo-actuated trapdoor for high-altitude drops. The design was extensively tested for structural integrity, motor torque requirements, drop precision, and electronics reliability—culminating in a robust …

Uav & Ugv Drone Competition (Raytheon), Christian Michael Freese, Adien Edmond Haro, Ethan Ray Andres, Sam Sakaguchi

Mechanical Engineering

Autonomous vehicles have been starting to address real-world issues through innovative technology. RTX (Raytheon) needs a way to have two autonomous vehicles, an unmanned air vehicle (UAV), and unmanned ground vehicle (UGV) reliably communicate with each other with the goal of landing and delivering a payload to designated delivery zones. This will foster creativity, innovation, and team-solving skills. Additionally, it will also promote & strengthen university relationships, evaluate top graduates, and promote corporate branding.

This report details the design process of a UAV-UGV delivery system developed for the RTX Autonomous Vehicle Competition (AVC). The system features a custom-built hexacopter UAV …

Llnl Raft Flash Pole Redesign, Jack Stangel, Evan Wolfson, Jake Borden, Alexander Meeter

Mechanical Engineering

During research exercises in the ocean, Lawrence Livermore deploys a fleet of rafts outfitted with flash modules affixed to tall poles (in tandem called flash poles) that flash while a photo is taken to act as datums for data collection. The current flash pole design that the LIDSS (Lawrence Livermore Independent Diagnostic Scoring System) team uses is too short to be visible in high seas, not mechanically suited to be made taller, too susceptible to the elements and blunt impact and too difficult to service. We aim to solve these issues.

Torsional Vibration Kit Simulator (Tks), Joseph Thachet, Luca Lawson, Ryan Ota, Otis Mcloughlin

Mechanical Engineering

The goal of this project was to create torsional vibration on a shaft while limiting axial and radial vibration. To do this an eddy current brake was used to slow down a rotating shaft. The electromagnets used to create the eddy currents are able to be turned on and off at a frequency produced by a function generator. This power cycling of the electromagnets creates an alternating braking force thereby inducing torsional vibration while limiting the other two vibration types

Uv Vessel Hoist Scope Of Work, Quinn J. Horak, Harvey Perkins, Andrew A. Osborn, Mikayla H. Nieman

Mechanical Engineering

The San Luis Obispo Wastewater Treatment Plant uses ultraviolet (UV) tubes to purify water. These tubes are cleaned by an internal wiping mechanism that must be removed for servicing and replacing damaged tubes. Currently, this is accomplished by using an engine hoist, but this method requires a large amount of effort and is not safe. Technicians have requested a new method of lifting wiper mechanisms that is safer, faster, and easier to use than their current method.

To solve this problem, we have developed a design that consists of a custom gantry crane with a hoist on a trolley. The …

Poly Mars Mini-Rover, Dane Carroll, Aaron Lubinsky, Henry Bouma, Gerardo Tapia-Onate, Scott Frizzel

Mechanical Engineering

The Cal Poly Mars Rover project is creating a fleet of near-identical rovers operating collaboratively to research the surface of Mars. Over the last six years, teams at Cal Poly have been developing vehicles to be launched upon the commercialization of interplanetary travel. Two of these vehicles are to take the roles of ‘Scout’ and ‘Relay’ with the most significant difference being their respective ‘arms.’ The ‘Scout’ will have a robotic arm that interacts with objects on the surface while the ‘Relay’ will have a fixed arm, equipped with a StarLink antenna to communicate with orbiting satellites as seen in …

Air To Water Capture In Support Of Un Sustainable Development Goals, Jordan Macconnell, Michael Tiscareño, Ari Dennis, Baxter Mercy

Mechanical Engineering

This senior project explored the use of thermoelectric cooling for atmospheric water capture. The system was designed to cool aluminum condensing surfaces below the dew point using Peltier modules, with forced convection heat sinks on the hot side. The purpose of this system was to gather reliable amounts of water for various water-scarce areas around the world to help meet the UN's sixth Sustainable Development Goal.

The final design of this project consisted of a 1.5 x 1.5 x 2 foot frame made of acrylic panels and insulation. Within the frame, the thermoelectric system was constructed using Peltier modules with …

Micro Mobile Home R3, Roha Y. Ali, Yuka M. Iwashita, Luke C. Douglas, Joshua Q. Le

Mechanical Engineering

Homelessness is an ever-growing issue all around the world. In 2023, over 250,000 or ~40% of all people experiencing homelessness did not have access to shelter spaces in the U.S. [1]. All people have the right to a place where they are safe from violence, crime, and the constant fear that they will be forced out.

Both homeless people and outdoor enthusiasts need a new way to keep themselves and their belongings safe when living outdoors, since existing products do not offer adequate security, portability, or versatility.

The Application Of Lidar For Classifying Wildland Fuels, Madison Muschetto

Master's Theses

Accurate vegetation classification is critical for modeling wildfire behavior, particularly in fire-prone ecosystems where fuel type influences fire spread and intensity. This study evaluates the effectiveness of UAV-based aerial LiDAR, supplemented by multispectral imagery, for classifying grass, shrub, and tree vegetation types across a grass-dominated landscape. Using canopy height thresholds, vertical profile analysis, LiDAR predictions were compared against field-verified vegetation observations at 80 survey points. Results showed that LiDAR classified grass with high accuracy but was less reliable for detecting shrubs and trees, especially under canopy cover. Misclassifications were most common beneath tree canopies and in areas where low-stature shrubs …

Frequent Itemset Mining With Tidyclust In R, Andrew D. Kerr

Master's Theses

Unsupervised learning is closely associated with clustering, however other methods fall under this umbrella such as data mining. In R, the tidyclust package provides a unified interface for clustering models, yet lacks support for data mining. This thesis addresses this gap by introducing the Apriori and ECLAT algorithms into tidyclust, with a focus on frequent itemset mining. Unlike traditional clustering models, frequent itemsets produce groupings of column variables, rather than cluster labels or partitions of observations. To address this, a novel clustering approach is proposed: items (columns) are grouped based on their ”dominant” frequent itemset. A key contribution is a …

Srh Lab Case Study: Ia, Mental Models, And Website Labels, Trista Wang

Graphic Communication

This paper discusses the results of a research study investigating Cal Poly students’ mental models regarding the Sexual and Reproductive Health Lab’s (SRH Lab) website. Mental models are beliefs that the user has about a website and how it functions, which affects how users interact with the website (Chan 2024). By tailoring its website to students’ mental models through appropriate nomenclature, the SRH Lab will be able to better engage and disseminate information to students.

52 students participated in a card sorting study, in which they were asked to intuitively sort cards labeled with SRH Lab website labels into different …

Floating Wind Turbine Foundation, Clayton Lahodny, Dillon Nelson, Trevor Ortega, Andrew Cervantes

Mechanical Engineering

The 2024 Collegiate Wind Competition (CWC) has introduced a new element to their Turbine Design Competition: a floating foundation. In previous years, foundations have been fixed-bottom in a box of sand and water. The Cal Poly Wind Power Club, who competes in the CWC every year, requires a floating foundation to be designed, manufactured, and tested to assist in winning the competition. The foundation is a large, hollow, cylindrical barge with a hanging spar (heavy mass). The barge will provide a restoring moment using buoyancy, and the heavy spar provides additional restoring moment. Four cables will be attached at the …

Exploring Who, Where, And When: A Mixed-Methods Analysis Of A New Study Abroad Program, Garrett Schoep, Elijah Duane Blake

Construction Management

Study abroad programs can have a significant impact on the lives of college students. These programs create opportunities for students to experience the world, while earning college credit. As Cal Poly is transitioning from the quarter system to the semester system, there is an increase demand for a new study abroad program that is tailored to students’ preferences. Understanding what students want from a study abroad program is extremely important. To better understand student preferences, a survey was created and distributed to Cal Poly students. The goal of the survey was to identify trends amongst students to get a better …

Analyzing Copyrightability Of Ai-Generated And Assisted Works Under A New Theory Of Authorship, Katherine Lu

Journalism

While pending cases like the New York Times’ case against OpenAI will be the first test for artificial intelligence (AI) in the copyright space, current copyright legislation inadequately answers questions regarding grey-area uses of generative AI in the creation of journalistic, creative, or academic works. The Copyright Office has established that copyright requires human authorship, but current legal definitions of authorship may include simple prompt writing as a form of authorship. This paper addresses the inadequacies of the current definitions of authorship, and proposes a new one that encompasses traditional definitions, the Copyright Office’s new motions addressing AI, and Christopher …

Keeping Coms Connected: Building A Foundation For Alumni Engagement, Ella Captain, Alec Tonas, Selina Bali

Communication Studies

This project addresses the lack of Alumni Engagement in the Communication Studies department at Cal Poly. It aims to cultivate a stronger department community by creating sustainable resources and events to deepen connections. We looked to answer how targeted alumni outreach could strengthen the department and what benefits this would bring to current students, faculty, and alumni. To do this, our group organized an Alumni Panel event, created a contact list, implemented student alumni liaison positions, solicited donations for the COMS spring social, and worked on the department website and social media. By applying research on communication theories, we were …

Degradation Characterization Of Nopal-Based Biopolymer Made From Opuntia Sp. Juice, Beeswax, Animal Protein, And Polyvinyl Alcohol, Logan Williams, Mary Elizabeth Holland, Spencer Williams

Materials Engineering

Since the introduction of polymers in the 1960s, there has been an exponential increase in use. Driven by rapidly growing demand, the volume of polymers in the production, application, and end-of-life stages has surged. The widespread use of these materials has led to escalating environmental pollution, which disrupts ecosystems, and contributes to global ecological degradation. While advancements in recycling technologies and infrastructure have shown promise, they have not maintained pace with polymer production and disposal. This imbalance warrants research into sustainable alternatives. Environmentally benign polymers derived from renewable sources and exhibiting minimal ecological impact at the end of their life …

Automation Of Post Fermentation Must Removal, Grace Hurley, Jakob Spink, Ariel Metscher

Industrial and Manufacturing Engineering

The Harvest Haulers project addresses a critical operational inefficiency at Saucelito Canyon Winery, where post-fermentation must removal from wine barrels was labor-intensive and potentially hazardous. This project aimed to develop a custom forklift attachment that could securely handle Bordeaux and Burgundy barrels, streamline the dumping process, and improve worker safety.

The resulting solution is a forklift-compatible fixture designed to lift, secure, and tilt barrels using a robust combination of a modified aluminum pallet, padded hoop, ratchet straps, and a custom hinge mechanism. The design meets all engineering requirements, including a 600 lb. load capacity, 135° tilt, and a single-operator setup …

Synthesis And Testing Of A Biodegradable Composite From Agricultural Waste, Amanda Anne Avrit, Kyla Carlson

Materials Engineering

In this study, polylactic acid (PLA) and ground pistachio shells are combined into a biocomposite with 15 wt% shells through compression molding. To improve interfacial bonding, shells were treated by alkali cleaning and functionalized with tetraethoxysilane before processing. Two biocomposite sample types were fabricated: PLA/shells and PLA/shells/chemical additives. The chemical additives (maleic anhydride and dicumbyl peroxide) were investigated to improve matrix and reinforcement bonding. Difficulties in processing resulted in four testable samples. Mechanical property testing showed that plain PLA samples performed the best on average. Incorporation of the additives increased both ultimate tensile strength and Young’s modulus by 50% as …

Langlands Reciprocity And The Splitting Behavior Of Primes In Number Fields, Skip E. Moses

Master's Theses

This thesis explores the evolution of reciprocity laws in number theory in order to provide a conceptual bridge between the classical ideas of quadratic reciprocity and the modern framework of the Langlands program. We develop the necessary algebraic background to understand how the splitting behavior of primes in number fields reflects deep arithmetic structure in ℚ. Starting with quadratic fields and cyclotomic extensions, we motivate the development of the Kronecker–Weber theorem and the characterization of abelian extensions of ℚ. We then introduce Artin reciprocity and show how it generalizes quadratic reciprocity through the formalism of Frobenius elements and Artin L-functions. …

A Case Study Of Leveraging Auxiliary Data To Improve Treatment Effect Estimation Precision In An Hiv Clinical Trial, Lana Mai Huynh

Master's Theses

Randomized controlled trials (RCTs) are typically the gold standard for evaluating treatment efficacy in the medical field, yet they can have small sample sizes due to logistical, ethical, and financial constraints. This limitation can result in imprecise treatment effect estimates. Recent methods have sought to enhance the precision of RCT estimates by incorporating information from large, observational, “auxiliary” datasets. An auxiliary dataset includes units that were not randomized in the trial itself, but may be similar to the RCT sample. By leveraging predictive models trained on these auxiliary data, researchers can adjust for potentially more powerful covariates, thereby reducing variance …

Case Study On Using Soil Nails In Unstable Substrates, Joseph Hass

Construction Management

Soil nailing is becoming a popular method in construction projects to anchor retaining walls into soil. To maximize installation success rates and minimize pullout failure during testing, this case study examines efficient techniques and installation protocols for soil nails in unstable substrates through research and studying an active construction site utilizing soil nails. In geotechnical engineering, unstable soil conditions present serious difficulties that frequently result in delays, cost overruns, and compromised structural integrity. This study determines the main elements affecting nail performance by carefully examining field data, installation trials, and performance testing. Using real life experience and in-depth research of …

Deeppanorf: Deep Prior For Neural 3d Reconstruction From Sparse Panoramas, Edward Du

Master's Theses

Advances in neural field representations have led to a significant improvement in view synthesis quality. However, many current novel view synthesis methods rely on a dense set of input views, which can be impractical and inefficient in real-world applications. We propose DeepPanoRF, a novel method for 360◦ scene reconstruction from a sparse set of input equirectangular panoramas. Built upon K-Planes, a radiance field representation that encodes explicit features on orthogonal feature planes, our method does not directly learn feature grids. Instead, we parameterize the feature grids to enable sparse view reconstruction without pretraining or additional regularization. We implement a custom …

Vertical And Latitudinal Variability Of Marine Heatwaves In The California Current, Gavin M. Plume

Master's Theses

Marine heatwaves (MHWs) are increasing in frequency and intensity globally, with grave effects on marine ecosystems and their dependent industries. There are significant gaps in knowledge of the subsurface behavior and geographic distribution of MHWs, especially in eastern boundary upwelling systems like the California Current. Here, two decades of full water-column temperature observations from a shallow autonomous profiler in San Luis Obispo Bay (~10m) revealed that while MHWs have similar average durations and intensities across all depths, one-third of bottom MHWs occur without a concurrent surface signal. MHWs across the water column initiated during anomalously weak upwelling or downwelling conditions …

The Chumash War Of 1824: Revolution And Counterrevolution In The California Missions Santa Inés, Santa Barbara, And La Purísima, Joseph V. Payne

Master's Theses

In 1824, the Indigenous Chumash of Missions Santa Inés, Santa Barbara, and La Purísima de Concepción went to war against the settler-colonial system that bonded them to the mission lands and forced labor regime demanded by the Spanish Franciscan missionaries and compelled by Mexican military force in Alta California. The conflict lasted months and included violent battles and skirmishes at all three missions, the militant occupation and reclamation of La Purísima, a mass exodus to the interior of the territory, and the subsequent counterrevolutionary collaboration of the Spanish missionaries and Mexican military to return many (but not all) of the …

Effectiveness Of Nutrition Education On Male Student Veterans From Cal Poly, San Luis Obispo University, Keith S. Kim

Master's Theses

This pilot study evaluated the effectiveness of a 13-week nutrition education intervention designed to improve dietary patterns, physical health, and mental health outcomes among 10 student male military veterans at California Polytechnic State University, San Luis Obispo. The intervention, grounded in the Dietary Guidelines for Americans, 2020–2025, included a one-time educational presentation and periodic recap videos to reinforce key messages. Outcome measures included dietary intake, body mass index (BMI), handgrip strength, depressive symptoms (via the Beck Depression Inventory), and post-traumatic stress disorder (PTSD) symptoms (via the PCL-5). Results revealed no statistically significant changes in dietary patterns, BMI, handgrip strength, …

Effect Of Household Oil Contamination And Agricultural Soil Contamination On Phyllosilicate Nanocatalyst Performance During Pyrolysis Of Polyolefins, Joey Velasquez

Master's Theses

The effect of household oil and agricultural soil contamination on catalyst performance during polyolefin pyrolysis was simulated on mixed virgin plastic pellets by evaluating contamination influence on mixed plastic degradation temperatures. Three phyllosilicate nanocatalysts including Fulcat435, Fulcat22F and Y-Zeolite were evaluated in this work based on a literature review of catalyzed plastic pyrolysis and these catalysts’ ability to lower plastic decomposition temperature by 50 °C – 100 °C. These findings were confirmed in this research through thermogravimetric analysis of a polyolefin mixture and further developed in furnace experiments containing household oil and agricultural contamination. Household oil contamination deactivated each of …

The Effect Of Dietary Strawberry Supplementation On Glycemic Control Factors In Overweight And Obese Postmenopausal Women With At-Risk Diabetes Mellitus Pathogenesis, Jennifer Herrera

Master's Theses

Glycemic control is directly related to type II diabetes mellitus (T2DM). As of 2023, 30.5 million Americans have T2DM, and this number only continues to increase exponentially across the world (“Facts & Figures,” n.d.). T2DM is only a precursor to fatal conditions including cardiovascular disease, the number one cause of death in the United States. Extensive research has revealed that strawberries, a high polyphenolic food, may pose positive effects on glycemic control biomarkers. This study aimed to investigate the effect of three servings of strawberries in the form of 39-g of freeze-dried strawberry powder (FDSP) for six weeks on glycemic …

An Analysis Of Renewable Energy Frames In The News Media Pre- And Post-Trump Administration, Kendall Anjolie Rozen

Communication Studies

This paper aimed to examine how news media portrayed environmental issues, specifically renewable energy, and how this may differ between two presidential administrations in the United States. Entman’s framing theory was used to analyze the portrayals of renewable energy in the articles selected. The frames chosen were based on research done by Rochyadi-Reetz et al. (2019) who established four framing dimensions within environmentally-focused news media. These dimensions are as follows: (1) economy, (2) society, (3) environment, (4) technology. A fifth dimension ((5) policy) was added by the researcher. This paper used a deductive quantitative analysis to mark these themes as …

Building Confidence, Building Careers: An Industry-Informed Evaluation Of A High School Aec Camp, Madisen Berube

Construction Management

This study assesses the effectiveness of the Girls Build Summer Academy, an architecture, engineering, and construction (AEC) summer camp for high school girls, and similar programs by gathering and analyzing feedback from industry professionals. The research aims to identify which program elements most successfully inspire interest and build foundational skills for young women considering careers in architecture, engineering, and construction. An anonymous survey was distributed to AEC professionals, some who were familiar with the program. The survey included multiple choice, rankings, and open-ended questions to evaluate areas for improvement and future curriculum development. Findings revealed strong support for interactive learning …