Digital Commons Network^™

Understanding Rare Species In California: An Assessment Of Camatta Canyon Amole (Hooveria Purpurea Var. Reducta) And A Meta-Analysis Of California Rare Plants In Literature, Kieran N. Althaus

Master's Theses

California is currently in the midst of a biodiversity crisis. There are approximately 5,000 native species of plants in California, a quarter of which are considered rare. Determining threats to these rare plants is often times difficult. Despite California's botanical resources, we still know very little about much of California’s rare plants. San Luis Obispo County is home to 2,000 of California’s native plant taxa, one- third of which are rare or endemic to the county. These species are of great local and environmental concern.

In Chapter 1, we attempted to assess the impact of non native species on a …

The Tragedy Of The Commons: A Podcast Exploring Solutions To The Housing Crisis In California, Delaney Li-Ming Faherty

City and Regional Planning

Affordable housing has become increasingly inaccessible across the United States, particularly in California. Because of its long history and far-reaching span, California’s housing crisis is a complexity that affects individuals at most income levels. Accordingly, opinions on solving the crisis vary among each public.

A popular solution is increasing the amount and scale of housing, however, barriers, such as single-family zoning, exist at the state and local level. While statewide legislation is working to counteract municipal zoning codes, local opposition is rampant. Because of this pushback, and the slow pace at which housing reliant on individual action is built, today’s …

Comparing Learned Representations Between Unpruned And Pruned Deep Convolutional Neural Networks, Parker Mitchell

Master's Theses

While deep neural networks have shown impressive performance in computer vision tasks, natural language processing, and other domains, the sizes and inference times of these models can often prevent them from being used on resource-constrained systems. Furthermore, as these networks grow larger in size and complexity, it can become even harder to understand the learned representations of the input data that these networks form through training. These issues of growing network size, increasing complexity and runtime, and ambiguity in the understanding of internal representations serve as guiding points for this work.

In this thesis, we create a neural network that …

Spacecraft Trajectory Optimization Suite: Fly-Bys With Impulsive Thrust Engines (Stops-Flite), Aaron H. Li

Master's Theses

Spacecraft trajectory optimization is a near-infinite problem space with a wide variety of models and optimizers. As trajectory complexity increases, so too must the capabilities of modern optimizers. Common objective cost functions for these optimizers include the propellant utilized by the spacecraft and the time the spacecraft spends in flight. One effective method of minimizing these costs is the utilization of one or multiple gravity assists. Due to the phenomenon known as the Oberth effect, fuel burned at a high velocity results in a larger change in orbital energy than fuel burned at a low velocity. Since a spacecraft is …

The Effects Of Atomic Oxygen On Silicone And Carbon-Based Contamination, Mayana W. Gordon

Master's Theses

Understanding the space environment and contamination concerns of a spacecraft is critical in designing a successful mission. The ability for a spacecraft to meet its science objectives relies on systems functioning as intended. A concern for maintain- ing performance while on orbit is molecular contamination. Silicones have previously been shown to form a silica layer on their surfaces when exposed to atomic oxygen. For silicone contamination, this translates to a silica film on the contaminated surface. Missions such as Long Duration Exposure Facility and Evaluation of Oxygen Interactions with Materials III have indicated that the silica film can trap deposits …

Design Justice In Community-Oriented Engineering Pedagogy And Practice, Michael S. Reyna

Master's Theses

While engineering service-learning projects are seen as a favorable way for students to reinforce curricular learning while gaining cultural awareness, the outcomes of these projects center student benefits over partner community wellbeing. For these projects, and in other engineering contexts, various scholar-activists have conceptualized numerous principles and methods to center justice and equity in engineering outcomes. This research project and its associated intervention involved collecting scholarship and methods in engineering and social justice, and attempted to integrate these ideas into the practices of a local humanitarian service-learning engineering team. The collected scholarship centered around the topics of Design Justice, feminist …

A Nano-Drone Safety Architecture, Connor J. Sexton

Master's Theses

As small-form factor drones grow more intelligent, they increasingly require more sophisticated capabilities to record sensor data and system state, ensuring safe and improved operation. Already regulations for black boxes, electronic data recorders (EDRs), for determining liabilities and improving the safety of large-form factor autonomous vehicles are becoming established. Conventional techniques use hardened memory storage units that conserve all sensor (visual) and system operational state; and N-way redundant models for detecting uncertainty in system operation. For small-form factor drones, which are highly limited by weight, power, and computational resources, these techniques become increasingly prohibitive. In this paper, we propose a …

Ofdm Channel Estimation With Artificial Neural Networks, Joseph W. Bednar

Master's Theses

The use of orthogonal frequency-division multiplexing (OFDM) by wireless standards is often preferred due to its high spectral efficiency and ease of implementation. However, data transmission via OFDM still suffers when passing through a noisy channel. In order to maximize the abilities of OFDM, channel effects must be corrected. Unfortunately, channel estimation is often difficult due to the nonlinearity and randomness present in a practical communication channel.

Recently, machine learning based approaches have been used to improve existing channel estimation algorithms for a more efficient transmission. This thesis investigates the application of artificial neural networks (ANNs) as a means of …

Modeling And Control Of A Planar Bounding Quadrupedal Robot, Patrick John Ward

Master's Theses

Legged robots have the potential to be a valuable technology that provides agile and adaptive locomotion over complex terrain. To realize legged locomotion's full abilities a control design must consider the nonlinear piecewise dynamics of the systems. This paper aims to develop a controller for the planar bounding of a quadrupedal robot.

The bounding of the quadruped robot is characterized by a simplified hybrid model that consists of two subsystems for stance and flight phases and the switching laws between the two states. An additional model, the Multibody model, with fewer simplifications, is used concurrently to best approximate real-world behavior. …

Quantum Key Distribution Simulation Using Entangled Bell States, Nayana Tiwari

Physics

To communicate information securely, the sender and recipient of the information need to have a shared, secret key. Quantum key distribution (QKD) is a proposed method for this and takes advantage of the laws of quantum mechanics. The users, Alice and Bob, exchange quantum information in the form of entangled qubits over a quantum channel as well as exchanging measurement information over a classical channel. A successful QKD algorithm will ensure that when an eavesdropper has access to both the quantum and classical information channels, they cannot deduce the key, and they will be detected by the key generators. This …

The Role Of Psychotherapy In Effective Integration Of Spiritually Transformative Experiences, Michael Deklerk

Social Sciences

Building upon the rich literature in the discipline of spiritually transformative experiences (STE) studies, this paper examined the role of psychotherapy in facilitating the integration of STE narratives. STEs are broadly defined as a discrete experience of an altered state of consciousness that brings about a profound transformation in the spiritual identity and life expression of the experiencer (Brook 2017). STEs include near death experiences, mystical experiences, spiritual energy or kundalini awakenings, diverse psychic experiences, and inspired creativity (Kason 1994). Current psychological frameworks, theories, and interventions for STE integration were reviewed. Additionally, one clinician registered with the American Center for …

Fire Safety Management Plan For South Texas Project Turbine Generator Building, Brett Long

Fire Protection Engineering: Culminating Experience Project Reports

This report includes a fire protection and life safety analysis of the South Texas Project Turbine Generator Building (TGB). This analysis was done to fulfill the requirement for the Master of Science Degree in Fire Protection Engineering from California Polytechnic State University. The Turbine Generator Building consists of three elevations and is Type II-B construction. The TGB’s primary use is a special-purpose industrial building housing the turbine generator, main feed pumps, condensate pumps, condenser, feed water re-heaters, secondary cold chemistry lab, Balance-of-Plant (BOP) diesel, batteries, and switchgear, 13.8 kVA switchgear, and various other systems and components. This analysis consists of …

Fire Protection And Life Safety Analysis Of The Adult Education Facility, William K.W. Bridges

Fire Protection Engineering: Culminating Experience Project Reports

The objective of this report is to provide an analysis of an existing building’s prescriptive-based and performance-based design methods. The intention is to provide the building owner with a working assessment of the building’s current life safety situation, as well as providing recommendations to improve the overall life safety and property protection of the selected building. This report is developed following the writing style and structure to meet the requirement for the Master of Science Degree in Fire Protection Engineering from California Polytechnic State University. The analysis includes an evaluation of the building owner’s fire and safety program for the …

Air Wear, Ani M. Svadjian, Ada A. Tadeo, Deepthi Ravuru

General Engineering

Since the outbreak of COVID-19 pandemic, hospitals have experienced an overwhelming increase in patients needing respiratory assistance. Our client identified the need for a sustainable, affordable, and portable outpatient device that will provide supplemental oxygen and assisted breathing to speed up the patient recovery process. Our team accomplished to design a device that contains a more sustainable oxygen supply method, has a longer functional duration, is safer and ergonomic, as well as compact.

Design/ Rebranding Of Andies Cafe To Go Packaging, Ryan Oscar Kastella

Graphic Communication

The following pages goes over the creation of To go packaging for a restaurant called Andie’s Cafe that sorely lacked it. The To go packaging that was created for this was Menus, Tamper Seal Stickers, Bags, and a Burger Wrapper. The goal in creating these is to increase there brand awareness and improve there current packaging branding.

The Queer Dictionary, Mia Lew

Graphic Communication

With the government continually obstructing queer education in public schools, it becomes harder and harder for queer people to understand themselves than in turn, have the tools to explain what they are going through to others. This is a problem but in turn an opportunity. While there are queer literature and children’s books out there, they typically only encompass one story or one view on queerness. Thus, this project's main goal is to encompass queerness as a whole by using as many LGBTQ+ words as possible, people's stories under each word, historical graphics, highlights on the internationality of queerness, pronoun …

Fire Protection And Life Safety Analysis Of Christopher Cohan Center, Kristen Dentici

Fire Protection Engineering: Culminating Experience Project Reports

This report analyzes the fire protection and life safety systems of the Christopher Cohan Center. The building was assessed from both a prescriptive and performance-based approach.

The prescriptive design analyzed the code requirements for the building based on the 2018 IBC, with some consideration for the codes in place at the time of construction. The prescriptive analysis main focus was on egress systems, fire alarm and detection, fire suppression, and structural fire protection. The egress analysis found that the exits and exit configuration were sufficient for the occupant loads that were calculated for the building. The fire alarm and detection …

Solar Powered Electric Bicycle, Joseph Kent Debruynkops

Liberal Arts and Engineering Studies

A solar-powered electric bike that is useful for college students.

Barker Bird Animatronic Senior Project Report, Marcus Monroe, Nolan Clapp, Ishan Jandaur, Jonathan Ogden

Mechanical Engineering

This document describes how our F71 Senior Design Project team developed a 3D printed, electronic bird that mimics Disneyland’s first animatronic, the Barker Bird. An animatronic is a mechanical puppet that replicates real life movement with robotic parts. Disney’s Barker Bird is a well-known animatronic that replicates a talking macaw with multiple moving systems. The final prototype completed by our team serves as a teaching tool for CAPED (Cal Poly Amusement Park Engineers and Designers) club members that are interested in the field of animated robots.

Wave Goodbye To Salt, Andy Wu, Amanda Olla, Solie Grantham, Charlie Sinclair

Mechanical Engineering

Our team of Cal Poly Mechanical Engineers ideated, designed, built, and tested a system to help combat the growing problem of widespread drought in coastal and island communities. We developed a proof-of-concept model of a wave powered, mechanical system to desalinate ocean water using a reverse osmosis process. From topical research, it was found that there are many ways to harness a portion of the huge amount of energy that the ocean provides. While large scale ocean water desalination plants are already in operation, smaller scale desalination units powered by ocean waves are largely underdeveloped. Our relatively small and inexpensive …

Insulated Solar Electric Cooker With Phase Change Materials, Weijun Zhao, Jake Lung, Owen Chu, Sarah Melzer

Mechanical Engineering

This Senior Project Report documents the development and design process of the Insulated Solar Electric Cooker with a Phase Change Material (ISEC w/ PCM). In this project, we developed a PCM assembly that can be integrated into an existing ISEC system which utilizes two 100 W solar panels. This report details the use of a nitrate salt solution of 60% NaNO3 and 40% KNO3 and demonstrates its potential as a viable form of thermal storage solution for cooking. We found that only 1kg of PCM is able to retain its heat for around 5 hours after power removal and believe …

Insulated Solar Electric Cooker With Solid Thermal Storage, Eric M. Cortes, Andy M. Mccombs, Dominick Trageser, Nami Suzuki

Mechanical Engineering

This Senior Project report outlines the design for our senior project under the Mechanical Engineering department of California Polytechnic State University. Insulated solar electric cookers (ISEC) are a relatively novel and exciting solution to the ethical, environmental, and medical issues associated with the conventional cooking methods - burning of biomass and charcoal - practiced in nonindustrial countries around the world. ISECs use solar energy input from a solar panel to cook food within an insulated chamber and have been researched and developed by Dr. Peter Schartz and his research group over the past several years. However, our target users expressed …

Shallow-Water Wind Turbine Foundation, Andrew Walker, Nico Nani, James Cusanelli, Zachary Dunkelberger

Mechanical Engineering

Over the 2021-2022 academic year, we, the Shallow Water Wind Turbine Foundation senior project team, designed, manufactured, and tested a fixed bottom, sand mounted turbine foundation for the Cal Poly Wind Power Club’s Collegiate Wind Competition turbine. The foundation was restricted to certain material, installation, and geometric constraints outlined in this report, and needed to support the turbine under operating conditions including 22 m/s wind speeds. The design was analyzed using primarily a bearing capacity geotechnical analysis to determine final geometry and weight. The foundation was then manufactured using welded, custom carbon steel parts.

The foundation was inspected for geometric …

Baker/Koob Final Report: Solar Solution For Mini Mars Rover, Jonathan Cederquist, Cole Korchek, Derick Louie, Michaella Ochotorena, Collin Petersen

Mechanical Engineering

This project focused on designing, building, and testing a functional prototype of a collapsible solar array on the mini Mars rover being developed by client and sponsor, Mr. Rich Murray. Although many previous collapsible solar arrays have been deployed for space missions, the previous solar-powered Mars rovers only deployed their arrays once upon landing. This solar array will be able to collapse and deploy multiple times to allow for greater rover mobility and stability when the rover is not charging. This system is critical to the success of the rover project because it provides power without which the rover cannot …

Legislative Language For Success, Sanjana Gundala

Master's Theses

Legislative committee meetings are an integral part of the lawmaking process for local and state bills. The testimony presented during these meetings is a large factor in the outcome of the proposed bill. This research uses Natural Language Processing and Machine Learning techniques to analyze testimonies from California Legislative committee meetings from 2015-2016 in order to identify what aspects of a testimony makes it successful. A testimony is considered successful if the alignment of the testimony matches the bill outcome (alignment is "For" and the bill passes or alignment is "Against" and the bill fails). The process of finding what …

Smart Usb-C Wall Plug For The Dc House Project, Ridge Lahti, Dino Maslic

Electrical Engineering

DC operated devices and appliances powered by AC systems suffer inefficiencies resulting from the losses of converting AC energy into DC energy. At Cal Poly, the DC House Project aims to minimize the need for AC electricity in homes and encourage the use of renewable energy systems. The DC House uses a 48V DC bus that must be stepped down for use with increasing number of DC loads in a typical home. In this project, a Smart USB-C Wall Plug is designed to work with USB Power Delivery to provide a variable voltage output for use with these DC loads …

Current-Source Dc-Dc Converter, Rocio Sanchez-Mendoza, Carlos Aguilar, Adrian Aranjo

Electrical Engineering

In this project, a hardware implementation of a current-source DC-DC converter for powering sensors used in an underwater communications system is presented. The proposed converter is designed to step down an input current of 0.9 A to 0.625 A, while maintaining an output voltage of 24 V and output power of 15 W. An overview of the system design is explained as well as the component selection process. The design of the converter was simulated and evaluated using LTspice before being physically constructed on a printed circuit board. Performance evaluation of the proposed converter was carried out in multiple lab …

Standalone Wireless Humming Music Synthesizer, Elizaveta Viktorovna Koush, Conrad Kinsey, Alberto Munoz

Electrical Engineering

This project, called a standalone wireless humming music synthesizer, aimed to provide a tool for musicians to make creating music easier. It did this by removing learning barriers and adding an assistive functionality element that current synthesizers fail to address.

Existing methods for synthesizers typically include a keyboard or some collection of buttons to play melodies on. This requires the knowledge of music theory and a learning curve for the instrument, and this device aims to tackle this barrier. A device that can synthesize your voice into high-quality audio removes this musical knowledge barrier and allows anyone to easily convert …

Mars Rover Structure, Ethan Nikcevich, Justin Marhoefer, Will Kish, Brenden Billing

Mechanical Engineering

Our project is the third iteration of a design to create a small Mars rover. Our main challenge was to change the existing rover structure into something that could survive the harsh conditions of Mars. This meant altering the design so that it could resist the large temperature fluctuations while still maintaining the structural stability and interface to support driving functions and the projects of the other rover teams. Our team accomplished this goal by altering the design of the existing rocker bogey from completely 3D printed to a tube and joint system. The longer portions of the rocker bogey …

Montagna Restaurant Brand And Website Development, Kevin A. Shin-Wheeler

Graphic Communication

My goal for this project was to provide engaging branding and collateral for the fictitious Montagna restaurant to increase its consistency and tangibility. I wanted to create a design guideline for all aspects of the Montagna brand to ensure that Montagna’s logo, typefaces, colors, interaction elements, and other stylistic choices are aesthetically pleasing and match the brand’s identity. Next, set out to make an accessible, interactive, and exciting website for the restaurant and a cohesive menu aligning with the design specifications. Although the brand is fictitious, I wanted to design it with actual needs in mind so that somebody could …