Digital Commons Network^™

Drop Ceiling Inspection Robot, Kris Chon, Henry Fang, John Hoang, Kevin Zhang

Electrical and Computer Engineering Senior Theses

Electricians face significant health and safety hazards when inspecting drop ceilings, including exposure to dust, asbestos, and the risk of falls. To address these challenges, this project proposes a lightweight, autonomous robot capable of inspecting drop ceilings and assisting with wire tracing tasks—thereby distancing electricians from hazardous environments. The robot employs tread-based mobility to navigate fragile ceiling panels, integrated ultrasonic sensors and bumpers for obstacle avoidance, and an antenna system to detect and follow energized wire signals. Visual feedback is provided to the operator through a real-time video feed over a secure NoMachine interface, with manual and semi-autonomous operation modes …

“You Can Rise Back Up Again”: Using Photovoice To Understand Healing From Intimate Partner Violence Among Lgbtq+ Racial-Ethnic Minority College Students, Stephanie Lim

Dissertations and Doctoral Documents, University of Nebraska-Lincoln, 2023–

Intimate partner violence (IPV) is a longstanding public health crisis that has been linked to deleterious mental and physical health issues and negative academic outcomes among college students. Further, IPV disproportionately affects LGBTQ+ individuals and certain racial-ethnic minority students. Campus services are not adequately meeting the needs of these survivors and these efforts would be better informed by centering students disproportionately affected by IPV. Guided by intersectionality and minority stress theories, the current photovoice study examined the strengths that fostered healing and the challenges that LGBTQ+ racial-ethnic minority survivors faced in their recovery journeys. Participants were eight LGBTQ+ racial-ethnic minority …

Dreamvisions+: Virtualizing Medieval Poetics In Multimedia Performance, Mac Waters

Dartmouth College Master’s Theses

DreamVisions+ is a transdigital and transhistorical odyssey into the realm of fiction and truth, reality and virtuality. Rooted in the tradition of late medieval dream-vision poems—wherein religious or political allegories unfold through dreaming protagonists—DreamVisions+ stages a multimedia dream vision of the digital age, reading medieval dream visions as proto–virtual reality. Through the creation and analysis of DreamVisions+, a full-length solo multimedia performance, I synthesize live electroacoustic music, XR technologies, and 3D game environments with medieval textual and visual iconography to construct a porous, unstable dream world that collapses medieval and digital imaginaries.

Situating my work within broader political …

Health And Wellbeing: A Report Of The 2022 U.S. Transgender Survey, A. Rastogi, L. Menard, G. H. Miller, W. Cole, Daniel Laurison, J. Caballero, S. Murano-Kinney, R. Heng-Lehtinen

Sociology & Anthropology Faculty Works

The 2022 U.S. Transgender Survey (USTS) is the largest survey that examines the experiences of transgender people in the United States. The National Center for Transgender Equality (now Advocates for Trans Equality) conducted the survey in the fall of 2022 and 92,329 binary and nonbinary transgender respondents from all 50 states, the District of Columbia, American Samoa, Guam, Puerto Rico, and U.S. military bases took the survey. The USTS was an anonymous, online survey for transgender people ages 16 and older in the United States and was available in both English and Spanish. The 2022 survey followed the 2015 USTS …

Investigating Terrorist Use Of Improvised Explosive Devices In The United States: Evidence From Us Federal Court Cases, 2009 – 2024, Angie Benda, Austin C. Doctor

Political Science Faculty Publications

Terrorist use of improvised explosive devices (IEDs) remains a persistent and evolving threat within the United States. Until now, few data collection and analysis efforts have focused on the systematic capture of terrorist bombing plots and attacks. Filling this evidence gap, this research note presents and analyses an original dataset of US federal charges associated with terrorism-related IED incidents in the United States observed from 2009 through 2024. The data features 110 related cases, the analysis of which indicates a sample peak in the use of IEDs in terrorist incidents occurred in 2024. Incidents are not siloed to a specific …

Quantifying Return On Controls In Llm Cybersecurity, Richard Helder Moulton

Masters Theses & Doctoral Dissertations

As large language models are increasingly deployed in real world systems, concerns about their security have grown. While these models demonstrate impressive fluency and utility, they are also susceptible to a variety of attacks, including prompt injection, data leakage, and adversarial manipulation. These vulnerabilities pose serious risks in high stakes environments where privacy, reliability, and trust are essential. Despite emerging efforts to document and mitigate such issues, a gap remains in the ability to systematically measure the effectiveness of proposed defenses in a quantifiable and reproducible manner.

This research addresses the question: how can security vulnerabilities in language model based …

The Caitlin Clark Effect: Evidence Of Athlete-Driven Market Disruption In Women’S Collegiate Basketball, Lawrence W. Judge, Jeffrey C. Petersen

Journal of Applied Sport Management

Caitlin Clark’s emergence as a generational collegiate basketball talent triggered a profound shift in consumer behavior, known as the “Caitlin Clark Effect” (CCE) (Lucas, 2025). This study examined attendance and venue utilization data from the University of Iowa’s women’s basketball program, spanning pre-, during-, and post-Clark periods. Results from one-way ANOVA analyses showed a statistically significant increase in average game attendance (home, away, and neutral), rising from 5,387 pre-Clark to 13,877 in her senior year (p < .001), with a sustained post-Clark average of 9,890. Arena capacity utilization followed a similar trajectory, increasing from 37.3% to 92.4%. Notably, post-Clark utilization remained at 74.3%, indicating durable fan interest. These findings provide time-sequenced evidence of a singular athlete catalyzing lasting institutional and market change in women’s collegiate sports. The study advances sport business theory by illuminating the strategic implications of athlete-driven branding and challenges assumptions underpinning facility planning and resource allocation.

Biofeedback For Upper Limb Bionics, Arissa Anaya, Adam Moger, Connor Bly, Theodore R. Hughes

Biomedical Engineering

The purpose of this document was to present a senior design project from Cal Poly sponsored by Matt Robinson at the Hanger Clinic in San Luis Obispo to provide biofeedback for users of upper limb protheses. This project focuses on individuals with trans-radial upper limb amputations, including patients with congenital limb deficiencies who use trans-radial prosthesis, who receive very little or no sensory feedback from their prosthetic device. This sensory feedback device was intended to be used as a training tool with a myo-electric hand-like upper limb prosthesis in a clinical setting. This document provides an overview of the different …

High-Frequency Current And Voltage Sensing Buck Converter Compatible With Model Predictive Control, Cathy G. Chen, Lani K. Nguyen

Electrical Engineering

This paper presents the design and implementation of a high-frequency buck converter operating at 1 MHz, integrated with voltage and current sensing capabilities for enhanced output regulation. The primary objective is to minimize transient dips in output voltage commonly observed during load disturbances or switching events. The converter design is intended to be compatible with a Digitally Assisted Analog Computing Circuit (DAACC) for real-time model predictive control (MPC), which leverages fast analog elements with programmable digital components to solve a penalty-based reformulation of the quadratic optimization problem underlying conventional MPC.

Wireless Communication In Autonomous Vehicles, Ethan Paul Spalard, Alan Rubalcava, Jarnail Singh Sanghera

Electrical Engineering

This project focuses on building a realistic, standards based V2X communication platform using DSRC (IEEE 802.11p) to support future autonomous vehicle control research. The system is built around commercial off-the-shelf (COTS) hardware, specifically the NXP i.MX 8XLite – V2X Evaluation Kit, which integrates an automotive-grade processor and the SAF5400 V2X modem to handle low-level DSRC transmission in the 5.9 GHz band.

We successfully completed the hardware bring-up, verified over-the-air communication between two nodes, and performed initial RF characterization using a spectrum analyzer. The SAF5400 was confirmed to operate on all seven DSRC channels (172–184), maintaining the correct 10 MHz bandwidth …

Piezoelectric Actuator Driver System, Daniel Hoefer

Electrical Engineering

This work presents the design, fabrication, and testing of a high-voltage piezoelectric actuator driver system purposed for integration into defense and aerospace precision motion control applications, particularly those in laser optics. The core challenge addressed was the mismatch between the standardized 28V DC power bus used in military systems and the significantly higher voltage requirements of piezoelectric actuators. Existing commercial drivers were evaluated and found unsuitable for field deployment due to inadequate ruggedness, excessive complexity, or power limitations. Consequently, a modular system architecture was designed featuring four independent driver channels, each using a high-voltage, high-current linear amplifier topology to scale …

Direction Finding From Aerial Platforms With Amateur Radio Arrays, Ben Duval Iii, Esteban Perez

Electrical Engineering

This senior project presents the development of a communication network designed to remotely control and program a distributed digital antenna array for autonomous synchronization and calibration. The system facilitates command transmission using a custom BPSK communication protocol operating in the UHF band (430–450 MHz) and employs a two-tone waveform to extract frequency, phase, and timing offsets between array nodes. These offsets are critical for aligning received signals in preparation for digital beamforming. The array comprises four nodes: three aerial units and one ground-based control unit. Each node is built using a LimeSDR Mini 2.0, Raspberry Pi, portable battery pack, and …

Mesh-Networked Uav Swarm: Experimental Leader-Follower Formation Control, Toma Grundler, Jack Ryan

Electrical Engineering

In recent years, unmanned aerial vehicles (UAVs) have demonstrated significant potential for multi-agent coordination applications, yet reliable formation control algorithms remain challenging to implement in real-world environments. This report presents the design, simulation, and hardware implementation of four leader-follower formation control strategies for UAV swarms. The implemented algorithms include a semi-rigid PI controller based on forward and lateral distance error, a hybrid PID controller utilizing mixed error signals with velocity and position feedback, a simplified velocity-based PID controller operating on individual coordinate components, and a GPS offset controller with direct positional control. MATLAB simulation validated controller performance in four different …

Marine Energy Collegiate Competition - Polywave Energy, Beneda Loya, Isaiah Martinez, Emily Nicoletta, Michael Weber

Electrical Engineering

This document is the final Electrical Engineering senior project report for Cal Poly’s 2025 Marine Energy Collegiate Competition (MECC) team. The goal of this project is to build and test a wave-energy converter designed to address the need for sustainable power generation for remote coastal community microgrids. These existing systems often rely on costly, fossil-fuel generators, creating both logistical and environmental challenges. Our device aims to provide a renewable, low-maintenance solution that can operate reliably in offshore environments and serve commercial or research applications. The goal of the electrical engineering team was to develop a system that can convert rotational …

Synthetic Aperture Radar Processing For Increased Resolution Of Englacial Strata, Ava Stockman

Electrical Engineering

Glaciological research relies on a variety of remote-sensing methods to study the internal structure of glaciers and other bodies of ice. Synthetic Aperture Radar (SAR) serves as one method for imaging large cross sections of englacial strata, reducing the need for labor-intensive, costly, and hazardous ice coring expeditions and operations. Characterizing englacial structures using SAR images allows scientists to learn about the ice dynamics of past and present which provides the basis for discoveries about climate history and glacial dynamics. This project explores the benefits of employing various SAR processing methods to raw phase history data acquired through the British …

Test Equipment Automation And Remote Operation Curriculum Senior Project, Raheel Rehmatullah

Electrical Engineering

The goal of this project is to create new lab procedures and lab bench permutations for Cal Poly EE students to implement automated Test and Measurement equipment into their electrical engineering education. Currently EE students at Cal Poly have no classroom based opportunities to learn about leveraging software skills and test equipment knowledge in order to automate measurements, which is a valuable skill for an electrical engineer in the workforce. The curriculum outlined in this project will include three experiments, each leveraging an instrument controller, and Python as the primary scripting language. Each procedure will require students to write Python …

Autonomous Mapping Rover, Garrett Jones, Timothy Kyle Chu, Eugenio Caruso Pasos

Electrical Engineering

This report details the design, implementation, and evaluation of "Rovero," an autonomous mapping rover developed as a senior project. Rovero integrates state-of-the-art technologies, including ROS2 for communication, SLAM algorithms for mapping, and sensor fusion for accurate navigation. The project aimed to achieve robust autonomous operation in indoor environments, leveraging a combination of LiDAR, IMU, and encoder data for real-time decision-making. Key challenges addressed include path planning, obstacle avoidance, and integration of multiple sensor inputs. Results demonstrate successful mapping capabilities and efficient navigation performance.

Leader-Follower Platooning With Turtlebot3: A Low-Cost Ros Test-Bed Using Vision-Lidar Fusion, Patrick Kelly Crandall, Kalon Ma Bienz

Electrical Engineering

This report presents the design, implementation, and indoor validation of a two-robot leader–follower platoon built on low-cost Turtlebot3 platforms. Each robot runs ROS Noetic on an on-board Raspberry Pi 4, fusing a fisheye camera for HSV-based lane detection with an LDS-02 LiDAR for clustering-based leader identification. A dual-loop architecture (PD steering for lateral control and PID for longitudinal gap regulation) maintains a 0.40m headway and keeps the follower centered within +/- 5 cm of the lane midline, without any inter-vehicle communication or external localization. Track experiments at speeds up to 0.18m/s achieved mean gap error of +/- 3 cm and …

Advanced Light Dimming Power Converter, Jaden Nguyen, Edwin Lin, Alan Thai

Electrical Engineering

This senior project discusses and follows the development of the Advanced Light Dimming Power Converter meant to modernize the power electronics curriculum and improve student safety for a lab. The power converter attempts to replace the original experiment which includes a traditional TRIAC-based dimmer and focuses on demonstrating phase angle control for incandescent light bulbs. However, several drawbacks including high-voltage exposure and outdated technology warranted a revamp. The redesigned module includes a dual-experiment setup with an updated TRIAC-based dimmer circuit and a new AC-DC LED driver circuit with constant current control and PWM dimming capability. Both systems have been fabricated …

The Feasibility Of A Concise Online Anatomical Atlas For Nonmedical / Dental Healthcare Profession Education, Ming-Fong Chang, Chi-Chuan Yeh, June-Horng Lue, Chung-Liang Chien, Shu-Hao Hsu, Meng-Lin Liao

Journal of Medical Education

The web-based anatomical atlas of the National Taiwan University (NTU-WAA) was established in response to the reduction in teaching hours and reported to enhance the anatomy learning of nursing students. This study aimed to further analyze the use time over the entire semester and explore the learning outcomes of a large-scale cohort of students from seven nonmedical/dental healthcare professions using the NTU-WAA for their anatomy learning. The anatomy scores of lecture and laboratory examinations and questionnaires from 222 students were collected and analyzed. Participants were categorized into subgroups based on their self-report use time on NTU-WAA: less than 1 hour …

Arkansas Corn And Grain Sorghum Research Studies 2024, Jason Kelley, Travis Faske

Arkansas Agricultural Experiment Station Research Series

The 2024 edition of the Arkansas Corn and Grain Sorghum Research Studies Series includes research results on topics pertaining to corn and grain sorghum production, including weed, disease, nematode, and insect management; economics; irrigation; agronomics; soil fertility; drone use; and research verification program results.

Our objective is to capture and broadly distribute the results of research projects funded by the Arkansas Corn and Grain Sorghum Board. The intended audience includes producers and their advisors, current investigators, and future researchers. The Series serves as a citable archive of research results.

The reports inform and guide our long-term recommendations, but should not …

The Impact Of Perceived Social Support On Postpartum Depression: The Mediating Role Of Psychological Capital And Sense Of Coherence, Hana K. Aman

psychology

Background: The relationship between postpartum depression and social support is highly supported in research. However, few studies investigated the factors that could intervene with this relationship. The purpose of this research is to investigate how psychological capital (PsyCap) and sense of coherence (SOC) can mediate the relationship between perceived social support (PSS) and postpartum depression. Methods: This study analysed data from 217 postpartum women with age range between 25-41(M= 30.12, SD= 3.65). The sample was recruited from public and private hospitals and obstetrics/gynaecology and paediatric clinics in Cairo, Egypt. Data was collected using Arabic versions of the Edinburgh Postnatal Depression …

Incidental Finding Of An Infarcted Epiploic Appendage Attached To The Sigmoid Colon, Ifeanyi K. Uche, Alec A. Hirsch

School of Medicine Faculty Publications

Background: Epiploic appendagitis is a condition usually caused by infarction of the epiploic appendages, small outpouchings of adipose tissue found on the serosal surface of the colon. Epiploic appendagitis is a rare cause of acute lower abdominal pain, but the condition does not have any specific presenting clinical features and is often misdiagnosed as acute diverticulitis, appendicitis, or other gastrointestinal disorder. Case Report: A 53-year-old female presented with abnormal uterine bleeding and pelvic pain and was seeking definitive surgical management. During the patient’s total laparoscopic hysterectomy with bilateral salpingo-oophorectomy, an infarcted epiploic appendage attached to the sigmoid colon was found. …

The Impact Of Voluntary Disclosure Of Customers’ Names On Firm Value, Mu Li

Dissertations, Theses, and Capstone Projects

Customers are a primary source of a firm’s revenue, and a firm’s relationships with its customers are one of the key factors of its success. To reduce information asymmetry regarding customers, the U.S. Securities and Exchange Commission (SEC) mandates that all publicly traded firms disclose sales to major customers who account for more than 10% of the firm’s consolidated sales. Firms may voluntarily disclose more customer information such as customers’ names. While managers may be concerned with the financial implications of such voluntary disclosure, no studies to date have explored how it impacts firm value. Using a sample of 768 …

The ‘Double-Exposure’ Of Riverine Communities In Northeast India To Dams And Climate Change, Costanza Rampini

Faculty Research, Scholarly, and Creative Activity

No abstract provided.

Investigating Hardware Injections In Ligo O3 Data: Simulated Signals From A Neutron Star In A Low-Mass X-Ray Binary, Jediah Gofhaone Tau

Theses

Simulated continuous gravitational wave (CW) signals, called hardware (HW) injections were added to the data in the LIGO detectors' third observing run (O3), including two periodic signals mimicking a spinning neutron star in a binary system, similar to the Low-Mass X-Ray Binary (LMXB) Scorpius X-1 (Sco X-1). Using a cross-correlation pipeline, which searched for CWs from Sco X-1 in O3, we searched for these HW injections, using an uncertainty around the true signal parameters akin to the uncertainty associated with the parameters of Sco X-1. One of the signals, residing in the 230-235 Hz frequency band, was detected. The other …

Parsing Of Math Formulas And Chemical Diagrams Using Graph-Based Representation And Attention Models, Ayush Kumar Shah

Theses

Mathematical formulas and chemical diagrams appear frequently in scientific documents but are often embedded as visual content, either rasterized or vector-based images, limiting their accessibility and automated analysis. This thesis aims to bridge this gap by presenting a graph-based visual parsing framework that recognizes and parses these notations from both vector and raster image inputs in digital documents. For mathematical formulas in born-digital PDFs, we construct Symbol Layout Trees (SLTs) using a graph defined over vector-based primitives, capturing spatial relationships, avoiding relying on OCR. For born-digital chemical diagrams, we introduce a Minimum Spanning Tree (MST)-based technique that extracts molecular structure …

Navigating Early Career As An Oncologist: Thriving In Diverse Paths., Gita Suneja, Marjorie C Green, Janaki Parameswaran, Joseph Mccollom Do

PCI Publications and Projects

Early-career oncologists navigate a complex landscape of professional development, clinical responsibilities, and research endeavors. This manuscript explores key challenges and strategies for success in the early years of an oncology career, focusing on the first job after fellowship, career transitions, and practical tips for intentionality. Effective mentorship is pivotal, providing guidance in clinical decision making, research pursuits, and professional networking. Career development strategies include securing funding, building collaborative networks, and identifying opportunities for leadership. Additionally, balancing clinical duties with research and personal well-being requires time management and institutional support. This article emphasizes the importance of fostering inclusive mentorship, advocating for …

Borderplex Business Barometer, Volume 9, Number 6, Thomas M. Fullerton Jr., Steven L. Fullerton

Border Region Modeling Project

No abstract provided.

Nato Self-Defense – Is Article 5 The Right Framework For Responding To Sub-Kinetic Cyber Aggression?, Shreyas Kumar, Gary D. Brown, Srividhya Ragavan, Maddalena Cerrato, Gourav Nagar

Faculty Scholarship

Cyber aggression presents a significant challenge to traditional frameworks of collective defense, particularly under Article 5 of the NATO Washington Treaty, which obligates member states to respond collectively to an "armed attack." While NATO has acknowledged that cyber incidents may trigger Article 5, ambiguity persists over what constitutes a cyber "armed attack," especially in the absence of kinetic effects. This uncertainty complicates NATO’s ability to address increasingly prevalent sub-kinetic cyber threats, such as economic disruption, data manipulation, and interference in democratic processes. Unlike conventional military threats, cyber operations often fall below the traditional threshold of armed conflict while still exerting …