Digital Commons Network^™

Compressor Rotor Joints And Interference Fit Study, Isabela Jimenez, Aubrey Perez, Isaiah Guerrero, Jireh Velasquez

Mechanical Engineering

Solar Turbines need a comprehensive study on the effects axial and radial inference fits have on turbine compressor rotor stiffness. The aft weldment of the compressor has press-fit dowel pins and pilot joints to connect one weldment section to another. These fits need to be assessed through a finite element modal analysis, as well as practically tested through modal impacts to investigate how the fits affect the stiffness of the turbine’s connected weldments. The experimental data will be used to validate the finite element analysis (FEA) model.

Forged Carbon Fiber Adventure Project, Timothy Villafana, Victor Javadoff, Nathan Pittiglio, Cooper Starr

Mechanical Engineering

Forged carbon fiber compression molding remains a relatively under-researched manufacturing process. While there are documented processes online, the options are few and far between. Our sponsor and case-study user, Dr. Mello, tasked us with the goal of researching and developing a process for forged carbon fiber compression molding through means of modifying his prototype of a bike pack handlebar cradle (figure 3). This prototype will allow us to create tooling which will be used to manufacture a handlebar cradle that can withstand larger loads and more extreme environments using our developed process. A handlebar cradle is a structural support for …

Raytheon Rtx Autonomous Vehicle Competition (Avc) - Unmanned Ground Vehicle (Ugv), Bryant Jonathan Martinez-Bautista, Geovanni Lara, Jared Herrera, Jose Barrera

Mechanical Engineering

Raytheon RTX has four universities participating in a competition to successfully complete various challenges with a UAV and UGV including navigation and landing. The students must work collaboratively to integrate and manufacture a working UGV that is compatible with the UAV.

Our sponsor is Raytheon, more specifically Mr. Luis Esparza. Important stakeholders also include Cal Poly and the entire team of ME & CPE working on the project. Raytheon and Luis are looking for innovative solutions that can be applied for real world scenarios where UAV’s and UGV’s are applied. Cal Poly is gaining recognition, and the team is gaining …

Peltier-Based Hydration Accumulation Terminal (P.H.A.T.), Jenner Mucher, Ethan Pace, Renee Robolledo, Sabrina Luo, Taehoon Lee, Tarsem Pal

Mechanical Engineering

The objective of this project is to design an innovative potable water dispenser capable of safely delivering hot, ambient, and chilled water on demand for human lander missions. The system will support astronauts’ hydration and food rehydration needs while minimizing mass, power, maintenance, and contamination risks in microgravity and partial-gravity environments. Current spacecraft dispensers, such as the International Space Station (ISS) system, provide only heated water and have limited temperature control, cleaning accessibility, and microbial resilience. Building on NASA heritage designs and lessons learned from the ISS Potable Water Dispenser, this project advances a lighter, simpler, and more energy-efficient concept …

Mass - Modular Acoustic Suppression System, Julia Megargle, Michael A. Milner, Lucas Kaemmererer, Jonathan Corvera, Gabriel Choi, Emmi Cayer

Mechanical Engineering

The Modular Acoustic Suppression System (MASS) is a mass tuned damper that reverberates a membrane atop a cavity to absorb select acoustic frequencies produced by the Environmental Control and Life Support Systems (ECLSS) within NASA's Artemis Human Lander. The height of the reverberation chamber is adjusted to mitigate a range of varying tonal frequencies within the human lander.

Electronic Bike Chopper, Caleb S. Bermack, Joey Lederer, Ethan Dea, Evan Herrera, Fred Agregado

Mechanical Engineering

Our sponsor, David Royce, built an initial e-bike chopper prototype and desired an improved, next generation version. Our team designed and manufactured an electric bicycle to achieve the rugged visual style of a classic chopper motorcycle while improving stability and usability. The team built a functional E-Chopper prototype using a 4130 steel frame, custom dropouts, a long front fork, wide rear tire, ape-hanger handlebars, and prebuilt electric components such as the battery, hub motor, controller, throttle, and display. The design focused on reducing excess weight, improving frame rigidity, and meeting California e-bike regulations.

Buell Motorcycle Extended Swing Arm, Joseph Camuccio, Riley Clark, Vincent Sclimenti, Tristan Turcios

Mechanical Engineering

Buell motorcycle riders, including our sponsor Rick Lasko, need a way to easily and affordably manufacture and replace their swing arms with extended versions (4”, 8”, 12”, and 16”) that maintain the stock Buell aesthetic while also meeting the safety standards required for performance-intensive applications, such as drag racing. Each extended swing arm must be just as safe, strong, and rigid as the original swing arm. Currently, there is no convenient and affordable solution to this problem, which is why our sponsor, Rick Lasko, wanted a validated, repeatable manufacturing process and design that would allow riders to safely and consistently …

Guitar Pickup Testing Fixture, Koen Graue, Ethan Rezentes, Max Schecter, Timothy Webb

Mechanical Engineering

Small guitar pickup manufacturers and hobbyists have an interest in developing guitar pickups with unique tonal characteristics and responses, but currently lack a reliable way to test these pickups and characterize their sound. I.M. Bohannon Mechanical Design approached the team to develop a solution to this problem. In response, the team researched current technologies, customer needs, and existing products on the market to define the scope and requirements for a guitar pickup testing fixture. This report documents the work completed during the project scope and definition phase of Cal Poly's senior project process. It discusses researched topics and existing solutions, …

Investigating Heat Adaptation Solutions In The City Of Santa Clara, Ximena Garcia-Isabelli

Silicon Valley Power Sustainable Futures Program

In the face of climate change, weather events will become more frequent and severe. While heat adaptations have been explored, no such relationship between urban heat islands (UHI) within Santa Clara and specific applications of green infrastructure has been investigated. This policy brief aims to investigate the benefits and feasibility of heat adaptation solutions that will improve the urban environment and public health of the most vulnerable neighborhoods in Santa Clara. For Santa Clara, implementation of solar panel parking lots and green roofs should be prioritized.

Design And Implementation Of An Intelligent Wearable Health Monitoring System Using The Shimmer Platform, Christopher Tu, Rafael Martinez

Computer Engineering

This report goes over the wearable health monitoring system that we built that uses an activity classification system to tell what you are doing real time. We used a Shimmer3 sensor to collect accelerometer data and streamed it via Bluetooth to our laptops where we processed the data and ran a machine learning classifier to detect if someone is resting, walking or running. We collected our own data to train the Random Forest classifier that we used from scratch and ended with 98% accuracy. The system has a live dashboard implemented into it that shows sensor data and the current …

Estimation And Control For Physical-Ai Aerial Robots, Joshua S. Crain

Electrical Engineering

This project investigates the modeling, control, and state estimation of a Crazyflie 2.0 quadrotor using both a custom nonlinear simulation and the NVIDIA Isaac Lab robotics simulation framework. A twelve-state rigid-body dynamic model was developed to represent the translational and rotational motion of the vehicle, and classical cascaded PID control was implemented for position and attitude stabilization. To improve state awareness in the presence of sensor noise, Kalman Filter (KF) and Extended Kalman Filter (EKF) algorithms were integrated for state estimation. Initial controller development and verification were performed using a custom MATLAB/Python simulation environment based on numerical integration of the …

Emotional Support Through Ai: Venting To Artificial Intelligence Or A Perceived Human May Offer Comparable Emotional Well-Being Benefits, Meilan Hu, Jerlyn Q. H. Ho, Claire Ng, Shermaine S. M. Wong, Andree Hartanto

Research Collection School of Social Sciences

Artificial Intelligence (AI) chatbots are increasingly being explored as sources of informal emotional support, with emerging evidence suggesting that venting to these systems can reduce negative affect. Yet, it remains unclear whether such benefits depend on the responder's perceived identity. Given that emotional relief from venting often hinges on perceived authenticity and emotional validation, this study investigates whether the emotional well-being benefits of venting differ when users believe they are interacting with an AI chatbot versus a human, even when responses are content-matched. In a pre-registered experiment ( N = 279), participants were randomly assigned to either an AI-assisted venting …

Beyond Religious Narcissistic Identification: Agnostic And Atheistic Narcissism, Magdalena Żemojtel-Piotrowska, Jarosław Piotrowski, Bartłomiej Nowak, V. Saroglou, John Maltby, Constantine Sedikides, Mladen Adamovic, Nur Amali Aminnuddin, Seth Christopher Yaw Appiah, Rahkman Ardi, Zana Babakr, Einar Baldursson, Sergiu Bălţătescu, M. Bilgehan Aytaç, Li, Norman P., Bruno Bonfá-Araujo, Matthias Burghart, Phatthanakit Chobthamkit, Marilyn Clark, Magali. Clobert

Research Collection School of Social Sciences

Agnosticism and atheism are often grouped simply as nonreligious identities, yet emerging research highlights their distinct psychological profiles and social implications. Among these distinctions, collective narcissism—characterized by strong attachment to one’s group, exceptionalism, and grievance for recognition—offers a framework for understanding identity processes in both nonreligious groups. We examined whether agnostics and atheists exhibit collective narcissism and its forms (agentic—focused on exceptional effectiveness; communal—focused on exceptional morality) similarly to believers. We explored crossdenominational variance in agentic and communal collective narcissism levels relying on data from 77 countries (N = 3,570; 1227 agnostics, 2343 atheists). Agnostics and atheists from secular countries …

“Megadeal” Subsidies, Local Spillovers And Corporate Innovation, Yoojin Lee, Shaphan Ng, Aruhn Venkat

Research Collection School Of Accountancy

We examine whether the largest place-based, firm-specific corporate subsidies (“Megadeals”) awarded by state and local governments affect local firms’ innovation. First, we document that 1) subsidy firms innovate in the subsidized county and 2) subsidy firms bring inventors from other counties into the subsidized county, consistent with subsidy firms generating new knowledge locally. In our main test, we use a stacked cohort design with stringent fixed effects to document that local firms increase patenting following a Megadeal. Cross-sectionally, effects are increasing 1) in subsidy firm innovativeness, 2) in the technological closeness of subsidy firms and local firms, 3) when subsidy …

Beta2-Agonist And Anti-Inflammatory Combination Therapy For Asthma Rescue: A Paradigm Shift In Asthma Care, Neil Skolnik, Jessica Stieritz, Julie Akers, Timothy Hudd, Wendy L. Wright, Ileen Gilbert, Nazrin Yusufova, Bill Cook, Emily Robb, Henry Naddaf

Abington Jefferson Health Papers

The Global Initiative for Asthma (GINA) report and national and international guidelines have shifted away from short-acting beta2-agonist (SABA)-only bronchodilators as first-line asthma rescue therapy, recognizing that both bronchoconstriction and inflammation underlie the increase in symptoms preceding an exacerbation. Instead, the GINA Committee supports strategies to reduce inflammation, such as anti-inflammatory reliever (AIR) therapy (as-needed, low-dose inhaled corticosteroid [ICS]–formoterol or SABA–ICS for symptom relief) and single maintenance and reliever therapy (SMART) or maintenance and reliever therapy (MART; i.e., ICS–formoterol used as both maintenance and as-needed rescue therapy). This narrative review discusses the rationale behind the move toward AIR and SMART …

Climate Change Reduces Pollination Services And Sunflower Yields Across Europe And Northern Africa, Stella Gachoki, Clémence Riva, Danilo Bevk, Yamina Haider, Noureddine Adjlane, Ioannis Manthos, Bojan Stipešević, Zlatko Puškadija, Marin Kovačić, Leonidas Charistos, Fani Hatjina, Fabrice Requier

All Peer-Reviewed Publications

Sunflower (Helianthus annuus) productivity is highly dependent on pollinators, yet the effects of climate on pollination services and crop yield remain poorly understood. In this study, we investigate how temperature gradients influence flower-visiting communities, pollination services, and sunflower productivity across Europe and Northern Africa. We conducted standardized two-year (2022 and 2023) pollination exclusion experiments across 36 sunflower fields spanning a broad climatic gradient, from temperate regions in Slovenia to arid conditions in Algeria. We found that sunflower production (seed set, seed number, and oil content) relied heavily on insect pollination. However, this benefit declined with rising temperatures, likely due to …

Imagination And Its Mirror, Rubén Vega Balbás

Artículos científicos

The mirror exercise is a basic exercise in actor training. Mirrors are ubiquitous in dance halls. Theatre has been considered metaphorically as the glass where society gazes itself. From a philo-sophical perspective, the main question addressed here is: «How does reflectiveness concern imagination and performance?» This article in-quires on both sides of the mirror about the transmutation of ideas into images and the reverse, exploring whether physical bodies can perform subtlety. Drawing on Foucault’s heterotopia, Merleau-Ponty’s phenom-enology of perception, Deleuze’s monism, the Sufi concept of barzakh(Ibn ’Arabi, Corbin), Tantric pratibimba, and Taoist mirror-mind, the study gathers several transcendental philosophies into …

Multidomain Operations: The Pursuit Of Battlefield Dominance In The 21st Century. Edited By Amos Fox And Franz-Stefan Gady. Howgate Publishing, 2026., Nathan Jones

Journal of Strategic Security

No abstract provided.

Voces Del Exilio Cubano, Jesenia Alvear

World Languages and Cultures

This project examines how Cuban immigrants, particularly those who fled the Fidel Castro regime, developed political perspectives after migrating to the United States. By focusing on Cuban immigrant communities, this project seeks to understand how experiences under a communist government and migration have shaped political beliefs. Within the United States, Cuban-Americans have become one of the most politically active Latino communities. As a Spanish and Political Science double major with Cuban family ties, this project represents both my academic interests and my own family experiences. Growing up, I listened to political conversations at family gatherings that seemed to consume the …

Human-Ai Teaming Under Fire: Lessons From Ukraine’S Human-In-The-Loop Combat Ai Systems, Rahul Kumar Tiwari, Ram Babu

Journal of Strategic Security

This article examines human-artificial intelligence (AI) teaming in Ukrainian combat operations from 2022 to 2025, exploring the integration of AI systems with human decision-making in military contexts and how crisis-driven innovation can lead to human-AI teaming. The research addresses three questions: the effectiveness of human-AI teams compared with human-only or fully autonomous systems; the effect of organizational structures on the sustainability of AI integration; and strategic implications for the development of the doctrine and international security governance in the case of the North Atlantic Treaty Organization (NATO). The methodology uses mixed-method comparative case study analysis of three different Ukrainian systems: …

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 …

One Assay To Rule Them All: Development Of A Global Environmental Dna Tool To Support Range-Wide Surveys Of An Imperiled Sawfish And Its Application In The Eastern Tropical Pacific, Juan C. Cubillos-M, Annmarie Fearing, Demian D. Chapman, Peter M. Kyne, P. Joana Dias, Cindy Gonzalez, Ryan N. Lehman, Yaliana Chichaco, Bryan L. Huerta-Beltrán, Kayla L. Mcculloch, Sarah M. Toepfer, John K. Carlson, Nicole M. Phillips

Faculty Publications

Environmental DNA (eDNA) has emerged as a powerful tool to support the conservation of threatened species. The sawfishes are one of the most imperiled vertebrate groups, with all five species classified as Critically Endangered on the IUCN Red List of Threatened Species. Owing to their toothy rostra, sawfishes are easily entangled in a wide range of fishing gear, with mortalities in fisheries and loss of habitat driving global declines. The Largetooth Sawfish, Pristis pristis, historically had a circumtropical range, but has experienced severe declines in geographic range and abundance. Viable populations are thought to be confined to northern Australia, but …

Missed Clinic Appointments For Human Papillomavirus-Related Oropharyngeal Cancer, John M. Vieth, Anthony A. Mangino, Melina J. Windon, Joseph Valentino

Biostatistics Faculty Publications

Background: Missing appointments delay treatment affecting patient outcomes and healthcare resource utilization. Adherence to scheduled appointments has not been studied in patients with HPV-related oropharyngeal squamous cell carcinoma (HPV-OPSCC). Methods: We collected data from 36,690,000 scheduled medical outpatient encounters at the University of Kentucky Health Care from 2012 to 2021. A total of 36,579 of these encounters were from 334 patients with HPV-OPSCC. We performed regression analysis of no-show appointments by demographics, tumor characteristics, and insurance factors. Results: The no-shows rate for appointments was significantly higher for the HPV-OPSCC cohort (4.6% vs. 2.2% p < 0.001). The HPV-OPSCC cohort missed 36% of their appointments. Black, Hispanic, younger, those who have ever smoked and patients with advanced tumor stage all had statistically significantly higher no-show rates (p < 0.01). Conclusions: Treatment delay impacts cancer treatment efficacy and no-show appointments burden medical systems. Further research into targeted interventions is needed to lower barriers for attending appointments.

Resistance Is Not Futile: Lawyers Who Left Government Service In Furtherance Of Professional Duties, Mary-Beth Moylan

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 …

Message From The Journal Of Rural Social Sciences Editorial Office, John J. Green, Elizabeth Sweeney

Journal of Rural Social Sciences

No abstract provided.

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 …

Ecological Support For Stem International Doctoral Student Success, Emily A. Crider

Journal of Comparative & International Higher Education

International doctoral students enrich U.S. institutions but often encounter challenges that affect belonging and academic success. This qualitative study examined the social, cultural, and institutional challenges faced by international STEM doctoral students and the role of faculty advisor relationships in their adaptation. Guided by ecological systems theory, interviews with eight participants revealed five major challenges: language barriers, cultural differences, building social networks, financial challenges, and navigating institutional processes. Positive faculty mentorship was critical, with effective advisors demonstrating empathy, adaptability, responsiveness, guidance, and trust while supporting professional development, funding, and networking. Microsystem and mesosystem interactions were most influential. Findings emphasize the …