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Table Tennis Training Instrument (Ping Pongers), Derick Alvarado, Peter Sandberg, Andrew Wong

Mechanical Engineering Senior Theses

Table Tennis is an extremely popular sport worldwide, boasting an extensive market. However, it is a sport that generally requires other people to both play and practice with. The goal of this project was to create a machine that would serve table tennis balls for the purpose of individual practice. The machine was meant to fill the niche that other machines of the same type filled by allowing individuals to practice on their own without the assistance of another player or a coach. The main goal of the project was to offer a market competitive device, sharing the same basic …

Inductive Train Transport System, Nicholas Root, Devon Gibb, Ryan Cinarkaya, Davis Letsinger

Mechanical Engineering Senior Theses

Light rail systems can move large numbers of people at relatively high speeds as part of the transit networks critical to dense urban centers, lowering greenhouse gas emissions. However, costs associated with traditional light rail systems are incredibly high and hinder the implementation and expansion of such systems. In this paper, we detail the potential implementation of an inductively-charged, battery-powered light rail system with the potential to lower implementation and expansion costs. This system is compared to existing public transit networks and details of the subsystems required for the successful operation of the planned light rail system are established. As …

Camless Valve Engine, Berkeley Burbank, James Thomas Daniel, Haydn Fischer, Nicos Katigbak, John Holden Kleiner, Martin Raabe

Mechanical Engineering Senior Theses

This project focuses on the design and validation of a camless engine valve system as an  alternative to traditional camshaft-based valvetrain architectures. Conventional engines rely on  fixed camshaft profiles that limit performance and efficiency across varying operating  conditions. The goal of this work is to replace both the camshaft and throttle body with a  pneumatically actuated system capable of independently controlling valve timing, lift, and  duration in real time. By removing the mechanical constraints of a camshaft, the system has the  potential to optimize engine operation across all RPM ranges, improving efficiency and overall  performance without requiring major changes to …

Mantaray Profiler, Ashika Balamurugan, Divya Bengali, Angelina C. Ekdawy, Gabriela Ruiz, Alexander Israel Torres, Alondra Valencia Prado, Ysidro Magana

Interdisciplinary Design Senior Theses

Ocean health monitoring is essential for understanding and protecting marine ecosystems, yet existing methods of collecting oceanographic data are often expensive, labor-intensive, and difficult to scale. This project presents the design, integration, and testing of the MANTARAY Profiler, a low-cost, autonomous ocean-monitoring system developed to support repeatable environmental data-collection missions with reduced operator involvement. The system was designed to navigate among multiple surface waypoints, execute vertical profiling maneuvers, and collect water-column data while maintaining a compact, user-friendly, and transportable platform.

The profiler travels horizontally across the water surface to a predetermined GPS waypoint using autonomous navigation and heading-control algorithms. Once …

Predicting Clinical Outcomes Of Non-Specific Low Back Pain By Studying The Interaction Of Clinical And Demographic Factors Of A Retrospective Data Set, Erica Michelle Fernandes

Dissertations

The purpose of this research is to investigate demographic factors, including age, gender, body mass index (BMI), race, marital status, insurance type, severity of disease (initial pain level), and clinical factors such as number of visits (no. of visits) at physical therapy (PT), length of time at PT and the type of clinician either physical therapist versus physical therapy assistant (PTA), that most predict PT clinical outcomes in patients with nonspecific low back pain (NSLBP) and see if there is an interaction between demographic and clinical variables.

Methods

The current study is a retrospective, cross-sectional, observational study using secondary electronic …

The Relationships Among Neighborhood Disadvantage, Mental Health And Developmental Disabilities Diagnoses, And Race/Ethnicity In A U.S. Urban Location, Deborah Winders Davis, Kahir Jawad, Yana B. Feygin, Michelle Stevenson, Bethany Wattles, Veronnie Faye Jones, Jennifer Porter, W. David Lohr, Jennifer Le

Biostatistics Faculty Publications

Childhood health disparities by race have been found. Neighborhood disadvantage, which may result from racism, may impact outcomes. The aim of the study is to describe the distribution of mental health (MH) and developmental disabilities (DD) diagnosis across Child Opportunity Index (COI) levels by race/ethnicity. A cross-sectional study using 2022 outpatient visit data for children < 18 years living in the Louisville Metropolitan Area (n = 115,738) was conducted. Multivariable logistic regression analyses examined the association between diagnoses and COI levels, controlling for sex and age. Almost 18,000 children (15.5%) had a MH or DD (7,905 [6.8%]) diagnosis. In each COI level, the prevalence of MH diagnosis was lower for non-Hispanic (N–H) Black than for N–H White children. In adjusted analyses, there were no significant associations between diagnoses and COI for non-White children for MH or DD diagnoses. The odds of receiving a MH [OR: 1.74 (95% CI: 1.62, 1.87)] and DD [OR: 1.69 (95% CI: 1.51, 1.88)] diagnosis were higher among N–H White children living in Very Low compared to Very High COI areas. Current findings suggest that COI does not explain disparities in diagnosis for non-White children. More research is needed to identify potential multi-level drivers such as other forms of racism. Identifying programs, policies, and interventions to reduce childhood poverty and link children and families to affordable, family-centered, quality community mental and physical health resources is needed to ensure that families can build trusting relationships with the providers while minimizing stigma.

Should Dams Respond To Power Prices? Environmental Economics And Emissions Effects Of Hydropower Peaking, Levi Stephen Konrad-Shankland

Environmental Studies Senior Theses

Hydroelectricity stands to be particularly important to a decarbonizing power grid because unlike many renewables it is dispatchable. However, ramping up and down hydropower production at short notice to respond to power demand—hydropeaking—worsens many of the environmental harms of hydroelectricity (Bipa et al., 2024). In Chapter 1, I create a microeconomic framework to explain how and why revenue-motivated dams hydropeak.

In Chapter 2, I assess the extents to which six different case study dams around the US hydropeak, first by decomposing actual flow regime into combinations of counterfactual management objectives, and second with an index of flow variation alignment with …

The Post-Process Apostasy: Canaries, Calculators And Cathedrals, Thomas O. Main

University of the Pacific Law Review

No abstract provided.

Originalism And Saving The Constitution, Michael Vitiello

University of the Pacific Law Review

No abstract provided.

Assessing Rural Homelessness: A Mixed-Methods Case Study, Matthew Lyons, Ashley Feierstein, Christy Storey, Akilah Hairston, Jonathan Jones, Jada Brown, Sarah H. Cross

Journal of Rural Social Sciences

Rural homelessness represents a significant public health and human rights challenge, but research on homelessness in the United States has predominantly focused on urban settings. This case study describes a mixed-methods assessment of the prevalence, causes, and consequences of homelessness in a rural county. Through both surveys and interviews with stakeholders from multiple sectors (including both service providers and those experiencing homelessness), we built a rich picture of the scale and experiential dimensions of homelessness within the county. Here, we present our research methods, the main findings of each primary data collection arm, and the actionable conclusions drawn from the …

Rural Communities Transformed By Immigration Raids: A Community Of Capitals Perspective, Diego Thompson, Silvina Lopez Barrera

Journal of Rural Social Sciences

In 2019, communities of Central Mississippi experienced large-scale immigration raids. Past studies on immigration enforcement operations show that these types of events have significant consequences. Despite this scholarly evidence, little is known about the effects of large immigration raids and local responses in rural communities. Given the ongoing initiatives to carry out mass detention and deportation of immigrants, learning more about these events and the communities affected is paramount. Based on data from semi-structured interviews, this study uses the Community Capitals Framework to examine how large immigration raids have transformed communities. Results show that the raids had negative consequences in …

Behind The ‘Lettuce Curtains:’ Rural Homelessness In The Salinas Valley, California, Allison Evans

Journal of Rural Social Sciences

Rural homelessness remains under-researched despite its prevalence outside the city. This research note presents preliminary findings from a case study in the Salinas Valley, California, examining how rurality—particularly its statistical definitions and socio-cultural conceptions—shapes homelessness policy formation, resource allocation, and local politics. Semi-structured interviews conducted in spring 2023, alongside document analysis, explore rural homelessness in this unique context. Findings suggest that rural homelessness is highly salient to local politicians and policy-makers, particularly since the COVID-19 pandemic, with service clustering in Salinas and other regional towns with more progressive policies. Challenges include housing diverse unhoused subpopulations, especially migrant farmworkers, and confronting …

Co-Designed Interventions Package For Enhancing Women's Resilience In Reproductive And Child Health Through Income-Generating Associations: A Human-Centered Design Study In Tanzania, Kahabi Isangula, Aminieli Itaeli Usiri, Eunice Pallangyo

School of Nursing & Midwifery, East Africa

Background: Maternal and under-five mortality remain major public health concerns in many low- and middle-income countries, including Tanzania. Despite their widespread use in strengthening economic resilience, income-generating associations (IGAs) have not fully utilized their potential as platforms for addressing reproductive and child health (RCH) challenges.

Objective: This study aimed to co-design an intervention package with women participating in income-generating associations to enhance their preparedness and resilience in addressing RCH challenges in Tanzania.

Methods: A qualitative descriptive study guided by a Human-Centered Design (HCD) framework was conducted in the Arusha and Shinyanga regions of Tanzania. The study followed …

Computational Modeling To Evaluate Bipolar Flexible Electrode Designs For Use In Sciatic Nerve Stimulation, Krystyna S. Allman

Master's Theses

Peripheral nerve stimulation is clinically used to manage pain, rehabilitate motor function, and promote nerve regeneration. The sciatic nerve is often studied for stimulation due to its accessibility and clinical relevance. A conventional nerve cuff electrode is the least invasive method for nerve stimulation, but the mismatch of mechanical properties of the electrode with the nerve tissue can cause damage to the nerve and the electrode itself. This study investigated a novel bipolar, gold nanowire-based cuff electrode design and its ability to selectively activate fibers in the rat sciatic nerve at varying interelectrode spacings. In COMSOL, A finite element model …

Cloud Tank: Virtual Reality Performance Instrument For Embodied Audiovisual Remixing, Asya Ulger

Computer Science Senior Theses

Traditionally, live audiovisual performances are made behind a desk using a laptop and an audio controller. This setup restricts the performer’s movements and separates the artist from their work. Moreover, it narrows what counts as the performance to the output alone — the audience is preconditioned to treat the projected image and sound as the whole event, and not the artist producing it. Cloud Tank challenges this by positioning the performer’s body as the instrument, using virtual reality. As the performer, I mix spatialized audio and drive beat-aligned, reactive video layers through hand movement and hand-pose recognition. The audiovisual output …

Use Of Function Diagrams In Physiology Education, Thad E. Wilson, Brian A. Jackson, B. Peter Sawaya

Physiology Faculty Publications

Function diagrams focus on physiological concepts rather than associated structures and can serve as elaboration tools and mnemonic aids. A function diagram prototype of the gastrointestinal system was recently described (Wilson TE, Barrett KE. Adv Physiol Educ 45: 264-268, 2021). In this article, a functional diagram of the glomerulus, nephron, urinary system, and bladder is proposed. Colloquially named "Nessie the Nephron" to loosely capture the looping structure and elusive understanding of renal blood flow, glomerular filtration, and epithelial transport for the student, not to mention the nearly mythical countercurrent multiplier. "Navigating the Lochs" references Nessie's possible habitat and more importantly …

Socioeconomic Inequalities In Health-Related Quality Of Life During The Covid-19 Pandemic: A Six-Country Comparison Using The Eq-5d-5 L, Joëlle Eijkens, Joshua M. Bonsel, You-Shan Feng, M. F. Bas Janssen, Erica I. Lubetkin, Juanita A. Haagsma

Publications and Research

Purpose

Despite the growing attention to health inequalities, there is no global consensus on how to measure socio-economic status. This study examined inequalities in health-related quality of life (HRQoL) during the early phase of the COVID-19 pandemic across six countries—China, Italy, the Netherlands, Sweden, the United Kingdom (UK), and the United States (US)—using three SES indicators: education level, income, and work status.

Methods

Between April and June 2020, individuals aged 18–75 years old completed a web-based survey. HRQoL was measured using the EQ-5D-5L Level Sum Score (LSS), where higher scores indicate poorer health. Country-specific differences in LSS across SES groups …

Introduction To Mathematical Analysis Ii, Beatriz Lafferriere, Gerardo Lafferriere, Mau Nam Nguyen

PDXOpen: Open Educational Resources

These lecture notes complement the book Introduction to Mathematical Analysis I, Third Edition, with sections on integration, numerical series, series of functions, and selected advanced topics. Together, both volumes support a one semester or two-quarter course on introductory mathematical analysis.

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Hospital Bed Tray Table, Ava Mikeska, Sara Chamness, Samantha Kenney, Kaitlyn Ould

Mechanical Engineering

This project documents the design and development of a collapsible hospital bed tray table created through the Mechanical Engineering Senior Project program at Cal Poly, San Luis Obispo. The goal of the project was to reduce the floor space occupied by existing overbed tray tables while preserving the functionality, stability, and durability expected by patients, visitors, and healthcare staff.

The final design modifies a commercially available overbed tray table by incorporating a folding tabletop hinge mechanism and a telescoping base. The hinge allows the tabletop to lock in both the upright and stowed positions, while the telescoping base retracts to …

Thermosiphon Lab Experiment, Ella C. Perry, Zach Barry, Madison K. Felton, Lane A. Hunter

Mechanical Engineering

The Cal Poly Mechanical Engineering Department aims to develop a new lab centered on a thermosiphon solar system. This lab will introduce the operating principles of thermosiphons while integrating concepts from heat transfer, fluid dynamics, and thermodynamics. A thermosiphon functions by heating water using thermal energy. The lab will examine the efficiency of this energy transfer. The final lab will be tailored to enhance student learning while ensuring ease of use for the Mechanical Engineering Department.

Essential Oils Impact Rumen Kinetics But Not Post-Ruminal Digestibility In Steers Fed High-Grain Finishing Diets, Federico Podversich, Jorge Bonilla Urbina, Ana Clara B. Menezes

Animal Science Research Report 2026

No abstract provided.

25-26 Mecc: Magnetic Thread Wave Energy Converter, Adolfo Torres Flores, Maya Malay, Grayson Houghton, Chase Eavis, Ramyasree Kaja, Tyler Chin, Malia Merager, Chad Haines, Noah Borkum, Raina Moore

Mechanical Engineering

Remote coastal Alaskan villages face significant challenges accessing reliable and affordable electricity due to their geographic isolation and limited connection to central energy grids. These communities often depend on expensive and environmentally unsustainable diesel generators which are difficult to supply and operate. They require a new renewable, affordable, minimal maintenance power solution to decrease their reliance on fossil fuels and promote sustainable development in the region. Although several wave energy converters exist, none adequately suit the needs of these coastal villages, therefore a new design is required to support them. This project will be undertaken by three interdisciplinary teams made …

Smart Sleeve, Evan Abalos, Bright Jung, Owen Bowling, Wyatt Eberhart

Mechanical Engineering

Quantifying human arm muscle activity is essential for understanding human movements and helping individuals who suffer from motor or neurological impairments such as stroke or traumatic brain injuries. Today, these individuals, as well as clinicians, researchers, and athletes, face many challenges when using the traditional surface electromyography (sEMG) systems to monitor muscle activities, including complex setup, restricted mobility, discomfort, inconsistent placement of electrodes, and lack of accuracy. Therefore, a comfortable EMG sleeve device that accurately measures arm movement without interfering with daily tasks is needed, which the team will be designing, manufacturing, and testing as their senior project. In addition, …

Mobile Transfer Assist (Mta) Device, Ashley Homuth, Garrett Schnack, Will Bruner, Jacob Flores

Mechanical Engineering

The Mobile Transfer Assist (MTA) device was developed to assist caregivers with seated-to-seated transfers while reducing physical strain. The device uses a manually operated hand winch and pulley system to raise a user into a semi-standing position, allowing safe transfer between locations. The final design emphasizes portability, affordability, ease of use, and user safety through a modular frame, transfer sling, knee supports, and locking caster wheels. A verification prototype was fabricated and tested, demonstrating successful operation and compliance with project requirements established by VTC Santa Maria.

Hydropower Collegiate Competition 2026, Andres R. Arreola, Sammy D. Taporco, Kathryn E. Tinney, Ahmer S. Dhillon

Mechanical Engineering

The Hydropower Collegiate Competition (HCC) is sponsored by the Department of Energy’s (DOE) Water Power Technologies Office (WPTO) and is meant to offer university students an opportunity to solve complex hydropower challenges, build industry connections, explore career connections, and obtain a greater knowledge of hydropower’s potential in the United States. For this year’s competition, our team investigated a potential in-conduit hydropower site in California. Our work included creating a design package for a crossflow turbine related to our selected site and completing the community connections challenge. We also completed a siting and design report, community connections report, design and siting …

Clipped - A Clipless Bike Grip System, Colin P. Root, Jay Vaughan, Austin Mills, Oscar Weir

Mechanical Engineering

This bike grip system works by connecting a magnetic brace to magnetic pucks installed on handlebars to secure the rider. The brace is affixed inside a glove and connects to two retractable pucks to secure a rider using magnetic force only.

Process Improvement For Thermal Barrier Coating Masking Applications, Katherine Meezan, Aiden Senn, Saksham Giri, Katelyn Perez

Mechanical Engineering

Solar Turbines, a gas turbine manufacturer, needs a more efficient method to prevent the application of a thermal barrier coating (TBC) to select areas of their combustion liners during manufacturing. Currently, the process is labor, material, and time intensive: reusable masking tools should increase the efficiency of the TBC process.

This project is sponsored in full by Solar Turbines, and is under the guidance and administration of three Solar Turbines engineers: Chris Noone, Rick Rogers, and Carson Roff. The project is mentored by Cal Poly senior design Coach, Rick Lasko. This project will be completed by a team of four …

Semi-Automated Wine Case Palletizer, Ashley A. Corona, Joshan Darji, Russell Williams, Brett Beaudoin

Mechanical Engineering

The Semi-Automated Wine Case Palletizer project was sponsored by Saucelito Canyon Winery to reduce the physical demands of manually palletizing wine cases during bottling operations.

Using customer requirements developed through sponsor meetings and observations, the team designed, manufactured, and tested a semi-automated palletizing system consisting of a rotating carousel platform, pneumatic scissor-lift assembly, airbag jack, and forklift-compatible base. The design allows operators to maintain an ergonomic working height while accessing all pallet locations from a single position.

Engineering analyses, including finite element, fatigue, and buckling analyses, verified the structural integrity of the design. Prototype testing confirmed successful operation of the …

Me3328 Combined Loading Beam Bending Lab, Alejandro Islas, Viswesh Vancheeswaran, Owen Spencer, Henry Andrews

Mechanical Engineering

Serving as a new laboratory experiment for ME 3328 (Design for Strength & Stiffness), strain gauges were adhered, wired, and calibrated on a cantilever beam lab apparatus capable of undergoing pure bending, pure torsion, and combined bending.

Behind The Screen: A Comprehensive Framework For Digital Work Metrics And Data Integration, F. Demaria, A. Papana Dagiasis, M. Cavicchioli, T. Fabbri

Mathematics and Statistics Faculty Publications

The digital transformation and the subsequent datafication of work generate rich electronic traces that can be transformed into actionable insights through modern analytics. In this context, this study proposes a data-driven framework that leverages sidClustering and unsupervised Random Forest (RF) for clustering and feature selection, constructs composite indicators via multiple aggregation strategies, and employs visual tools to enhance the interpretability of results. A key feature of the framework is the integration of two data sources: click metadata from Microsoft 365 and employee attitudes measured through a questionnaire. This integration enables the analysis of digital work behavior (DWB) in relation to …